The invention pertains to a method for making a fluoropolymer comprising an aqueous emulsion polymerization of one or more fluorinated monomers wherein said aqueous emulsion polymerization is carried out in the presence of at least one cyclic fluorocompound of the following formula (I):
1-3 bridging group; Y is a hydrophilic function selected among anionic functionalities, cationic functionalities and non-ionic functionalities.
The invention pertains to a semi-crystalline fluoropolymer having ion exchange groups comprising recurring units derived from at least one ethylenicalty unsaturated monomer comprising at least one fluorine atom (fluorinated monomer); and a substantial amount of recurring units derived from at least one ethylenically unsaturated monomer comprising at least one ion exchange group (functional monomer), wherein the amount of unstable end groups of —COF type is of less than 0.05 mmol/kg, and the use of the stabilized fluoropolymer in fuel cells devices, a membrane and a membrane-electrode assembly.
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
The present invention pertains to an aqueous composition comprising: (A) at least one functional fluorinated polymer [polymer (F)] selected from: - a fluorinated ionisable polyurethane polymer [polymer (PUR)] comprising at least one fluorinated block comprising a (per)fluoropolyoxyalkylene chain [chain (ROF)] and at least one functional block comprising a hydrocarbon chain [chain (RH)] optionally comprising one or more aromatic or cycloaliphatic groups, said chain (RH) comprising at least one ionisable group, said blocks being linked by urethane moieties having formula (I) here below: wherein E is a divalent hydrocarbon group, linear or branched, optionally comprising one or more cycloaliphatic or aromatic groups, and - a fluorinated polymer [polymer (P)] comprising one or more perfluoroalkyl chains [chain (RF)] linked by one or more ester moieties having formula (II) and/or urethane moieties having formula (III) and/or urea moieties having formula (IV) here below: (B) at least one functional hydrogenated polymer [polymer (H)] different from said polymer (F), said polymer (H) comprising at least one functional group; (C) at least one cross-linking agent; wherein the weight ratio of the polymer (F) to the polymer (H) is higher than 0.75.
Use of a latex of perfluorinated polymers having particles with an average diameter between 5 and 200 nm for determining the binding constant of two interacting molecular species by Laser Light Scattering (LLS), said polymeric particles comprising on the surface an amphiphilic non ionic surfactant, the same or a different surfactant ended with a receptor and a ligand interacting with the receptor.
A process for producing a perfluorinated functional compound is disclosed, which comprises: A. converting an at least partially hydrogenated alcohol into an at least partially hydrogenated fluoroformate compound; B. reacting said at least partially hydrogenated fluoroformate compound with fluorine in the presence of at least one (per)haloolefin comprising at least one carbon-carbon double bond and having at least one fluorine or chlorine atom on either one of the carbon atoms of said double bond, to obtain a perfluorinated fluoroformate compound.
The invention pertains to a process for manufacturing certain (per)fluoroionomer liquid compositions, comprising, inter alia, at least one of fluorination and treatment with a polar solvent, to the liquid compositions therefrom having an improved solids content/surface tension/liquid viscosity compromise, to the use of the same for manufacturing composite membranes and to composite membranes obtainable therefrom.
B) a semi-crystalline fluoropolymer, in an amount of from 20% to 70% by weight relative to the total weight of A)+B), the semi-crystalline fluoropolymer being constituted of tetrafluoroethylene (TFE) homopolymers and copolymers of TFE with one or more monomers containing at least one unsaturation of ethylenic type, in an amount of from 0.01 to 10 mol %, said semi-crystalline fluoropolymer having a mean particle size between 10 and 400 nm.
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
The invention relates to a protective film for a solar cell module, to a process for manufacturing said protective film and to a solar cell module comprising said protecting film. The protective film comprises at least one layer comprising a perf luoropolyether (PFPE) polymer [polymer (F)], said polymer being obtainable by cross-linking a composition [composition (C) ] comprising : a) at least one functional perfluoropolyether compound [compound (E) ], said compound (E) comprising a (per) fluoropolyoscyalkylene chain [chain (Rf)], and at least one unsaturated moiety, said compound (E) being present in an amount included in the range of 10 % to 95 % wt with respect to composition (C); b) at least one nonfuorinated compound [compound (M) ] having at least one unsaturated moiety, provided that said nonf luorinated compound (M) has at least two unsaturated moieties if compound (E) has one unsaturated moiety; and c) at least one crosslinking initiator.
at least one fluoroionomer (I) [fluoroionomer (I-2)], the fluoroionomer (I-2) being substantially amorphous, that is to say having a heat of fusion of less than 4 J/g, and wherein the water extractable fraction of the fluoroionomer (I-2) is less than 40% wt, the liquid composition comprising the fluoroionomer (I-1) and the fluoroionomer (I-2) in a weight ratio (I-1)/(I-2) of at least 2:1.
The invention pertains to a process for the purification of a polyol (per)fluoropolyether derivative [polyol (P)], said polyol (P) comprising one or more hydroxyl (per)fluoropolyether derivatives [PFPE (OH)] comprising at least one (per)fluoropolyoxyalkylene chain (chain Rf) and at least one end-group having formula -CF2CH2OCH2CH(OH)CH2OCH2CH(OH)CH2OH (t3), from a mixture of hydroxyl (per)fluoropolyether derivatives [mixture (M)], said mixture (M) comprising said polyol (P) and at least one hydroxyl (per)fluoropolyether derivative [PFPE (OH)] different from polyol (P) and comprising at least one (per)fluoropolyoxyalkylene chain (chain Rf) and at least one end-group selected from those having formulae -CF2CH2OH (t1) and -CF2CH2OCH2CH(OH)CH2OH (t 2), said process comprising the following steps: step 1 : reacting the mixture (M) with a ketone and/or an aldehyde so as to yield corresponding mixture of cyclic ketal/acetal (per)fluoropolyether derivatives [PFPEs (OH)p] [protected mixture (P)]; step 2: molecular distillation of the protected mixture (P) so as to isolate a protected product heavy residue [product (Pr)]; step 3: hydrolyzing the product (Pr) so as to yield a deprotected product [product (Pd)]; step 4: distillation under reduced pressure of the product (Pd) so as to obtain polyol (P).
The invention pertains to a process for the purification of a polyol (per)fluoropolyether derivative [polyol (P)], said polyol (P) comprising one or more hydroxyl (per)fluoropolyether derivatives [PFPEs (OH)] comprising at least one (per)fluoropolyoxyalkylene chain (chain Rf) and at least one end-group having formula -CF2CH2OCH2CH(OH)CH2OCH2CH(OH)CH2OH (t3), from a mixture of hydroxyl (per)fluoropolyether derivatives [mixture (M)], said mixture (M) comprising said polyol (P) and at least one hydroxyl (per)fluoropolyether derivative [PFPE (OH)] different from polyol (P) and comprising at least one (per)fluoropolyoxyalkylene chain (chain Rf) and at least one end-group selected from those having formulae -CF2CH2OH (t1) and -CF2CH2OCH2CH(OH)CH2OH (t2), said process comprising the following steps: step 1 : reacting the mixture (M) with a ketone and/or an aldehyde so as to yield corresponding mixture of cyclic ketal/acetal (per)fluoropolyether derivatives [PFPEs (OH)p] [protected mixture (P)]; step 2: submitting the protected mixture (P) to adsorption on silica gel so as to yield an adsorbed protected product [adsorbed product (Pp)] and then recovering a desorbed protected product [desorbed product (Pp)] by subsequent desorption from silica gel of said adsorbed product (Pp); step 3: distilling the desorbed product (Pp) under reduced pressure so as to isolate a protected product residue [product (Pr)]; step 4: hydrolyzing the product (Pr) so as to obtain polyol (P).
6 group, preferably a group of formula
3 fluorocarbon group. The FAFS-hypofluorite adducts of formulae (I-A) and (I-B) can be produced with high selectivity so as to access useful intermediates which can further be reacted taking advantage of the un-modified fluorosulfate group chemistry.
The invention pertains to a process for the manufacture of a functional (per) fluoropolyether derivative comprising at least one triazole group, said process comprising: 1). reacting a (per) fluoropolyether hydroxyl derivative having at least one hydroxyl group [derivative (PFPE-OH)] with an activating agent, to yield an activated (per) fluoropolyether hydroxyl derivative comprising at least one activated hydroxyl group [derivative (a-PFPE-OH)]; 2). reacting said activated (per) fluoropolyether hydroxyl derivative [derivative (a-PFPE-OH)] with at least one azide salt to yield a functional (per) fluoropolyether derivative comprising at least one azido group [derivative (PFPE-N3)]; 3). reacting said functional (per) fluoropolyether derivative comprising at least one azido group [derivative (PFPE-N3)] with a hydrocarbon compound having a terminal alkyne group to yield a functional (per) fluoropolyether derivative comprising at least one triazole group [derivative (PFPE-azole)].
Microporous membrane composites that are non-dewetting are disclosed. These microporous membrane composites are wet with solutions of methanol and water and are non-dewetting following autoclave treatment in water. The microporous membrane composites comprise a microporous membrane support that is coated with a crosslinked ionomer comprising hydrophilic groups. Compared to the microporous membrane support, the microporous membrane composite has a flow loss on average in isopropyl alcohol of less than 82%.
optionally at least one (per)fluoropolyether [(per)fluoropolyether (E)].
The incorporation of the polymer (F) in the fluoroelastomer composition as described above enables easier processing of the fluoroelastomer composition, both in injection molding and extrusion molding technologies, yielding improved behavior in mold release, mold fouling, and aspect surface of the molded parts.
C08L 27/00 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères
C08L 27/04 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant des atomes de chlore
C08L 27/06 - Homopolymères ou copolymères du chlorure de vinyle
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
C08L 33/14 - Homopolymères ou copolymères des esters d'esters contenant des atomes d'halogène, d'azote, de soufre ou d'oxygène en plus de l'oxygène du radical carboxyle
C07C 41/26 - Préparation d'éthers par des réactions ne formant pas de liaisons sur l'oxygène de la fonction éther par introduction de groupes hydroxyle ou O-métal
C07C 43/12 - Éthers saturés contenant des atomes d'halogène
The invention pertains to a method for replicating a pattern, said method comprising: (a) providing patterned template, wherein said patterned template comprises a patterned template surface having a plurality of recessed or protruded areas formed therein; (b) contacting a volume of a curable perfluoropolyether composition [composition (C)] with said patterned template surface, said composition comprising: - at least one functional perfluoropolyether compound [compound (E)], said compound (E) comprising a (per)fluoropolyoxyalkylene chain [chain (Rf)], wherein the molecular weight of said chain Rf is more than 1000 and less than 3500; and at least two unsaturated moieties; and - at least one photoinitiator; (c) submitting to UV radiations said composition (C) to yield a mould comprising a patterned mould surface, and separating said mould from said patterned template; (d) contacting said patterned mould surface with a (pre)polymer composition [composition (P)]; (e) processing said composition (P) to yield an article having a patterned surface, and separating said article from said mould.
G03F 7/00 - Production par voie photomécanique, p. ex. photolithographique, de surfaces texturées, p. ex. surfaces impriméesMatériaux à cet effet, p. ex. comportant des photoréservesAppareillages spécialement adaptés à cet effet
G03F 7/027 - Composés photopolymérisables non macromoléculaires contenant des doubles liaisons carbone-carbone, p. ex. composés éthyléniques
The invention pertains to a peroxide curable perfluoroelastomer comprising: - recurring units derived from tetrafluoroethylene (TFE); and - recurring units derived from perfluoromethylvinylether (MVE); said perfluoroelastomer possessing a Mooney Viscosity (ML2+9) at 121°C of 25 to 140 MU, when measured according to ASTM D1646 standard, and comprising said MVE recurring units in an amount of from 26 to 33% by moles with respect to total moles of TFE and MVE, to a process for its manufacture, and to the cured articles obtainable therefrom.
The invention pertains to a peroxide curable perfluoroelastomer comprising: - recurring units derived from tetrafluoroethylene (TFE); - recurring units derived from perfluoroethylvinylether (EVE), in an amount of between 2 and 17 % by moles, with respect to total recurring units derived from TFE, perfluoromethylvinylether (MVE) and EVE; and - recurring units derived from perfluoromethylvinylether (MVE), in an amount of between 23 and 35 % by moles, with respect to total recurring units derived from TFE, perfluoromethylvinylether (MVE) and EVE, to a process for its manufacture and to its use for the manufacture of cured articles.
1, or alternatively a functional group —COOH or —COF; Rf is a (per)fluoropolyoxyalkylene chain, in which the starting hydrogenated aromatic polymers are obtained by polycondensation, stepwise polyaddition or polyaddition of cyclic monomers in which the ring is formed by at least 3 atoms.
C08F 283/00 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères prévus par la sous-classe
C08G 63/91 - Polymères modifiés par post-traitement chimique
C08G 69/48 - Polymères modifiés par post-traitement chimique
C08G 85/00 - Procédés généraux pour la préparation des composés prévus dans la présente sous-classe
C08L 101/04 - Compositions contenant des composés macromoléculaires non spécifiés caractérisées par la présence de groupes déterminés contenant des atomes d'halogènes
The invention pertains to a (per)fluoroelastomer composition comprising at least one (per)fluoroelastomer [(per)fluoroelastomer (A)] matrix comprising particles of at least one perfluoropolymer [polymer (F)] having a melt flow index (MFI), measured at 372°C under a 5 Kg load according to ASTM D1238 standard, of less than 10 g/10 min, said particles having an average size of less than 100 nm.
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
The invention pertains to a process for the purification from ionic impurities of a fluoroionomer liquid composition, said process comprising: - providing a liquid composition comprising at least one fluoroionomer (1-1) in a liquid medium, said liquid composition comprising ionic impurities; and - contacting said liquid composition with a solid particulate comprising at least one fluoroionomer (I-2) having ion exchange groups, wherein H+ Or OH- ions are bound to at least a fraction of said ion exchange groups, and - separating said liquid composition from said solid particulate.
C08F 6/02 - Neutralisation de la masse de polymérisation, p. ex. destruction du catalyseur
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
C08L 27/22 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères modifiées par post-traitement chimique
The invention pertains to novel (per)fluoropolyethers comprising at least one (per)fluoropolyoxyalkylene chain (chain Rf) comprising at least one recurring unit (R2) having formula: -CF2-CF(CF2OSO2F)-O- [poly(fluorosulfate) PFPE], to a process for their manufacture, and to their use for providing functional (per)fluoropolyethers.
This invention pertains to sealing articles of vulcanized (per)fluoroelastomer compositions incorporating particles of a vinylidene fluoride (VDF) polymers having a Shore A hardness of at least 85 when determined according to ASTM D 2240 Type A Durometer method, and a compression set of less than 30 %, when determined according to ASTM D395 at 200°C for 70 h on O-ring according to ASTM Dl 414, and to a process for their manufacture by vulcanizing-molding and thermal post-treating at a temperature above the melting point of the VDF polymer.
Hydrofluoro alcohols of formula : A-(Rf)a-CFX-O-RhO-(CFX-(Rf)a*-CFX-O-RhO-)nH (I) in which : Rh is a hydrocarbon-based chain; X is F or a C1-C6 (per)fluoroalkyl; a or a* is 0 or 1; Rf is a (per)fluoro(poly)oxyalkylene chain or a (per)fluoroalkyl chain; A is chosen from -F, -C1 and -H (possible only when a = 1) or is HO- Rh-O-CFX-; n is an integer from 0 to 200, with the condition that n = 0 when A is chosen from -F, -C1 and -H.
j—CFZ—O— wherein j is an integer from 0 to 3, and Z is a fluorooxyalkylene chain comprising from 1 to 20 repeating units selected from the above reported fluorooxyalkylene units; comprising the reduction of peroxidic perfluoropolyethers comprising one or more of the above defined repeating units by using gaseous hydrogen in the presence of a catalyst comprising one or more metals of the VIII group supported on graphitic materials.
The invention pertains to the use of certain fluorinated thermoplastic polymer additives for reducing the coefficent of friction of non- fluorinated polymers and to masterbatches of said additives with non-fluorinated polymers.
The invention pertains to a method of forming a lubricating film on a surface, said method comprising applying to a surface a multiphasic composition comprising at least one (per) fluoropolyether (PFPE) lubricant, water and from 0.1 to 3 % by weight of water of at least one thickening agent, said multiphasic composition having a viscosity, when measured at 21 °C at a shear rate of 1 sec -1 of at least 10 Pa*S so as to form a layer, and drying said layer to form a lubricating film. By the use of the multiphasic composition as above detailed it is advantageously possible to convoy the PFPE lubricant to the surface to be lubricated using application techniques (doctor blade, metering rod,...) as those suitable for solid-like greases, while the actual conveyed lubricant behaves in lubrication as an oil, avoiding the use of fluorinated solvents.
C10M 107/38 - Compositions lubrifiantes caractérisées en ce que le matériau de base est un composé macromoléculaire contenant des halogènes
C10M 169/02 - Mélanges de matériaux de base et d'épaississants
C10M 171/06 - Particules de forme ou de dimensions particulières
C10M 173/02 - Compositions lubrifiantes contenant plus de 10% d'eau ne contenant pas d'huiles minérales ou grasses
C10N 40/06 - Instruments ou autres appareils de précision, p. ex. fluides amortisseurs
C10N 50/02 - Forme sous laquelle est appliqué le lubrifiant au matériau à lubrifier en solution ou en suspension dans un liquide porteur qui s'évapore ultérieurement pour laisser un revêtement lubrifiant
31.
OPAQUE FLUOROPOLYMER COMPOSITION COMPRISING WHITE PIGMENTS FOR PHOTOVOLTAIC ELEMENTS OF SOLAR CELLS
The invention pertains to a fluoropolymer composition having a total luminous transmittance (TT) of less than (15 %), when measured according to ASTM D1003 on a sample having a thickness of about 50 μm, said composition comprising : - at least one hydrogen-containing fluoropolymer [polymer (A)]; and - from 5 to 80% by weight of (A) of at least one inorganic pigment [pigment (I)]; - from 1 to 99 % by weight of (I) of at least one per(halo)fluoropolymer chosen among tetrafluoroethylene (TFE) copolymers having a dynamic viscosity at a shear rate of 1 rad x s-1 of less than 100 Pa x s at a temperature of 280°C [polymer (B)]. By adding polymer (B) to the composition based on polymer (A) it is advantageously possible to obtain an even dispersion of the pigment (I) so that a composition possessing outstanding opacity and still being processable under the form of films, so as to provide adequate mechanical properties, can be manufactured therefrom.
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
The invention pertains to a process for transferring heat from a heat source to a heat sink, said process comprising using as heat transfer medium a composition comprising: at least one fluorinated fluid free from functional groups (fluid (H)); at least one functional (per)fluoropolyether (functional PFPE(1)) comprising recurring units (R1), said recurring units comprising at least one ether linkage in the main chain and at least one fluorine atom (fluoropolyoxyalkylene chain), and at least one functional end group chosen between -COOH and -CONH2; at least one functional (per)fluoropolyether (functional PFPE(2)) comprising recurring units (R1) as defined above and at least one functional end group chosen between -COCF3 and its hydroxylated derivative -C(OH)2CF3.
(a) a membrane comprising at least one fluorinated ionomer [polymer (I)] comprising recurring units derived from tetrafluoroethylene (TFE) and from at least one monomer of formula (M):
(iii) maintaining an average temperature of more than 65° C.
The invention pertains to a method for making a fluoropolymer comprising an aqueous emulsion polymerization of one or more fluorinated monomers wherein said aqueous emulsion polymerization is carried out in the presence of at least one cyclic fluorocompound of the following formula (I): wherein X1, X2, X3, equal or different from each other are independently selected among H, F, and C1-6 (per)fluoroalkyl groups, optionally comprising one or more catenary or non-catenary oxygen atoms; L represents a bond or a divalent group; RF is a divalent fluorinated C1-3 bridging group; Y is a hydrophilic function selected among anionic functionalities, cationic functionalities and non-ionic functionalities.
C07D 317/10 - Composés hétérocycliques contenant des cycles à cinq chaînons comportant deux atomes d'oxygène comme uniques hétéro-atomes du cycle comportant les hétéro-atomes en positions 1, 3 non condensés avec d'autres cycles
This invention pertains to a novel process for the manufacture of a perfluorooxycarboxylate of formula (I): RfO-CF2CF2-O-CF2-COOXa (I) wherein Rf is a perfluoro(oxy)alkyl group, and Xa is H, a monovalent metal or an ammonium group of formula NRN4, with RN, equal or different at each occurrence, being H or a C1-6 hydrocarbon group, said process comprising: (A) reacting a perfluorovinylether of formula Rf-O-CF=CF2 with an ethylene glycol derivative selected among ethylene glycol (HO-CH2CH2-OH), glycolic acid (HO-CH2-COOH), glycolaldheyde (HO-CH2-CHO) and protected derivatives thereof, so as to yield the corresponding addition product of formula Rf-O-CFH-CF2-O-CH2-E, with Rf having the same meaning as above detailed, and E being selected among -CH2OH, -COOH and -CHO; (B) optionally protecting functional group E with suitable chemistry; (C) fluorinating said (protected) addition product to yield the corresponding perfluorinated addition product; (D) optionally deprotecting said perfluorinated addition product to yield corresponding acyl fluoride of formula Rf-O-CF2-CF2-O-CF2-C(O)F; (E) hydrolyzing and, optionally, neutralizing, said acyl fluoride for yielding the perfluorooxycarboxylate of formula (I).
C07C 59/135 - Composés saturés ne comportant qu'un groupe carboxyle et contenant des groupes éther, des groupes , des groupes ou des groupes contenant des atomes d'halogène
C07C 51/04 - Préparation d'acides carboxyliques, de leurs sels, halogénures ou anhydrides à partir d'halogénures d'acides carboxyliques
37.
PROCESS FOR IMPARTING GREASE, OIL AND WATER REPELLENCE TO SUBSTRATES
The invention pertains to a process for imparting grease, oil and water repellence to a substrate, said process comprising applying by means of a printing process on at least a portion of the surface of said substrate a composition comprising at least one (per)fluoropolyether derivative. The Applicant has found that by means of the process of the invention it is possible to confer suitable grease, oil and water repellence properties to substrates via selective treatment/coating, by significantly reducing total amount of fluoro-containing additive required for the target properties.
C08G 18/50 - Polyéthers contenant des hétéro-atomes autres que l'oxygène
C08G 65/00 - Composés macromoléculaires obtenus par des réactions créant une liaison éther dans la chaîne principale de la macromolécule
D21H 19/24 - Couches sans pigments appliquées sous une forme autre que la solution aqueuse définie dans le groupe comprenant des composés macromoléculaires obtenus par des réactions autres que celles faisant intervenir uniquement des liaisons non saturées carbone-carbone
G03C 1/93 - Substances macromoléculaires à cet effet
The invention pertains to a process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): RfO-CRf'X-CRf''Rf'''X' (I-A) wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf', Rf" and Rf"' equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X', equal or different from each other, are independently chosen among Cl, Br or I; formula (I-B); wherein Rf* and Rf*', equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups; X and X' are as above defined; said process comprising contacting said halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising at least one transition metal of group VIII B at a temperature of at most 340°C.
The invention provides a novel polymer comprising recurring units derived from vinylidene fluoride (VDF) and trifluoroethylene (TrFE), said polymer comprising end groups of formula -CF2H and/or -CF2CH3 in an amount of at least 60 mmoles per kg of VDF recurring units [polymer (F)], a process for its manufacture and the use thereof as ferroelectric, piezoelectric, dielectric or pyroelectric material in electric/electronic devices.
H01L 37/02 - Dispositifs thermoélectriques sans jonction de matériaux différents; Dispositifs thermomagnétiques, p.ex. utilisant l'effet Nernst-Ettinghausen; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives utilisant le changement thermique de la constante diélectrique, p.ex. en opérant au-dessus et en-dessous du point de Curie
The invention pertains to a method of lubricating a wind turbine gearbox comprising using a lubricating composition comprising at least one (i.e. one or a mixture of more than one) perfluoropolyether (PFPE) lubricant, i.e. a lubricant comprising a perfluorooxyalkylene chain, that is to say a chain comprising recurring units having at least one ether bond and at least one fluorocarbon moiety and to a wind turbine gearbox comprising a lubricating system containing said lubricating composition.
−1; in which the dissolution time of the component A), determined via the test of the rate of dissolution at a temperature of 40° C. or 18° C., is not more than 5 minutes when determined at 40° C. or 15 minutes when determined at 18° C., for an amount of dissolved acid equal to 99% of the theoretical amount, as defined in the rate of dissolution test; the said dispersions in the test of stability at 40° C. for seven days show variations in viscosity of not more than 300 mPa·sec; the said aqueous formulations being obtainable by grinding the crystals of imidoalkanepercarboxylic acids in α form dispersed in an excess of water, in the presence of a surfactant chosen from nonionic surfactants; cooling the liquid dispersion to a temperature below 30° C.
A01N 43/38 - Biocides, produits repoussant ou attirant les animaux nuisibles, ou régulateurs de croissance des végétaux, contenant des composés hétérocycliques comportant des cycles avec un atome d'azote comme unique hétéro-atome du cycle des cycles à cinq chaînons condensés avec des carbocycles
A01P 1/00 - DésinfectantsComposés antimicrobiens ou leurs mélanges
C11D 3/39 - Percomposés organiques ou inorganiques
The invention pertains to a process for the purification of a tetraol PFPE derivative [tetraol (T)] of formula (I): HO-CH2-CH(OH)-CH2-O-CH2-CF2-O-Rf-CF2-CH2O-CH2-CH(OH)-CH2OH (I), wherein Rf represents a fluoropolyoxyalkene chain (chain Rf), i.e. a fluorocarbon segment comprising ether linkages in main chain, from a mixture of hydroxyl (per)fluoropolyether derivatives [mixture (M)], said mixture comprising said tetraol (T) and at least one hydroxyl (per)fluoropolyether [PFPE (OH)] comprising a chain Rf terminated with at least one end group of formula: -CF2CH2OH) -CF2CH2O-CH(OH)-CH2-O-CH2-CH(OH)-CH2OH; said process comprising: step 1 : reacting the mixture (M) with ketones and/or aldehydes so as to selectively protect couples of hydroxyl groups on vicinal carbon atoms by forming corresponding cyclic ketal/acetal derivatives, so as to yield a protected mixture [mixture (P)]; step 2: reacting residual hydroxyl groups of the mixture (P) with suitable functionalizing agents enabling substantial volatility modification, so as to obtain a functionalized protected mixture [mixture (Pf)]; step 3: fractional distillation of the mixture (Pf) so as to isolate the cyclic acetal/ketal derivatives of tetraol (T); step 4. hydrolyzing the acetal/ketal derivatives of tetraol (T) so as to recover pure tetraol (T).
The invention pertains to a process for the addition of at least one (per)fluoropolyether peroxide comprising at least one peroxidic moiety and at least one fluoropolyoxyalkene chain (chain Rf) (i.e. a fluorocarbon segment comprising ether linkages in main chain) [peroxide (P)] onto a per(halo)fluorinated aromatic compound [compound (F)], so as to yield an addition compound of said compound (F), said addition compound [compound (A)] comprising at least one perfluorinated non-aromatic cyclic moiety having at least two substituents comprising a chain Rf and, optionally, conjugated or non conjugated double bond(s). Said addition compounds have been notably found useful as additives for (per)fluorinated fluids and lubricants or as base materials for the manufacture of gum and/or graft polymer compositions.
Process for preparing perfluoro-1,3-butadiene, comprising the following steps : A) preparation of fluoro-halo-butanes of formula : CF2 YI -CFYIICFYIICF2 YI (V) in which YI and YII which may be identical or different, may be H, C1 or Br, with the condition that YI and YII are not simultaneously hydrogen; starting with a chloroolefin having the formula : CY'Y = CY'C1 (II) in which Y, Y', Y', which may be identical or different, are H, C1 or Br, with the condition that Y, Y', Y' are not simultaneously hydrogen; and performing the following steps : - a fluorodimerization, and - a fluorination with elemental fluorine, the order of the two steps also possibly being inverted, - a dehalogenation or dehydrohalogenation step being performed between the two steps, B) dehalogenation or dehydrohalogenation of the fluoro-halo compounds of formula (V) to give the compound perfluoro-1,3-butadiene.
C07C 17/281 - Préparation d'hydrocarbures halogénés par des réactions comportant un accroissement du nombre des atomes de carbone dans le squelette par des réactions d'addition d'hydrocarbures halogénés uniquement d'un seul composé
C07C 19/10 - Composés acycliques saturés contenant des atomes d'halogène contenant du fluor et du chlore
C07C 17/04 - Préparation d'hydrocarbures halogénés par addition d'halogènes à des hydrocarbures halogénés non saturés
C07C 17/23 - Préparation d'hydrocarbures halogénés par déshalogénation
C07C 17/25 - Préparation d'hydrocarbures halogénés par élimination d'halogénures d'hydrogène à partir d'hydrocarbures halogénés
The invention pertains to a process for preparing compounds of formula (I-A) or (I-B) here below: by reaction of perfluoroallylfluorosulfate (FAFS) of formula (II): with at least one hypofluorite of formula (II-A) or (II-B): wherein: RF in formulae (I-A) and (II-A) is a monovalent fluorocarbon C1-C20 group, optionally comprising oxygen catenary atoms, optionally comprising functional groups comprising heteroatoms (e.g. -SO2F groups); R'F in formulae (I-B) and (II-B) is a divalent fluorocarbon C-1-C6 group, preferably a group of formula (III): wherein X1 and X2, equal to or different from each other, are independently a fluorine atom or a C1-C3 fluorocarbon group. The FAFS-hypofluohte adducts of formulae (I-A) and (I-B) can be produced with high selectivity so as to access useful intermediates which can further be reacted taking advantage of the un-modified fluorosulfate group chemistry.
C07D 317/42 - Atomes d'halogènes ou radicaux nitro
C07C 43/17 - Éthers non saturés contenant des atomes d'halogène
C07C 303/30 - Préparation d'esters ou d'amides d'acides sulfuriquesPréparation d'acides sulfoniques ou de leurs esters, halogénures, anhydrides ou amides d'esters d'acides sulfoniques par des réactions n'impliquant pas la formation de groupes sulfo estérifiés
C08F 261/06 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères de monomères contenant de l'oxygène tels que définis dans le groupe sur des polymères d'éthers non saturés
The invention pertains to an aqueous fluoropolymer composition comprising: from 15 to 80 % wt of at least one fluoropolymer [polymer (F)]; from 2 to 20 % wt of glass beads [beads (G)]; from 1 to 15 % wt of at least one non-ionic surfactant [surfactant (NS)]; from 0.01 to 15 % wt of at least on thickener chosen among organic phosphates and organic phosphonates.
C08J 3/02 - Production de solutions, dispersions, latex ou gel par d'autres procédés que ceux utilisant les techniques de polymérisation en solution, en émulsion ou en suspension
The invention pertains to a liquid composition comprising: - at least one fluoroionomer (I) [fluoroionomer (I-1)], said fluoroionomer (I-1) having a heat of fusion comprised between 4 and 20 J/g; - at least one fluoroionomer (I) [fluoroionomer (I-2)], said fluoroionomer (I-2) being substantially amorphous, that is to say having a heat of fusion of less than 4 J/g, and wherein the water extractable fraction of fluorionomer (I-2) is less than 40 % wt, said liquid composition comprising fluoroionomer (I-1) and fluoroionomer (I-2) in a weight ratio (I-1)/(I-2) of at least 2:1.
H01M 4/86 - Électrodes inertes ayant une activité catalytique, p. ex. pour piles à combustible
H01M 8/1004 - Éléments à combustible avec électrolytes solides caractérisés par les ensembles membrane-électrodes [MEA]
H01M 8/1039 - Matériaux d’électrolyte polymère halogénés, p. ex. des fluorures de polyvinylidène sulfonés
H01M 8/1081 - Matériaux d’électrolyte polymère caractérisés par le procédé de fabrication à partir de solutions, de dispersions ou de suspensions de polymères uniquement
The invention pertains to a liquid composition comprising: - at least one fluoroionomer (I) [fluoroionomer (I-1)], said fluoroionomer (I-1) having a heat of fusion comprised between 4 and 20 J/g; - at least one fluoroionomer (I) [fluoroionomer (I-2)], said fluoroionomer (I-2) being substantially amorphous, that is to say having a heat of fusion of less than 4 J/g, and wherein the water extractable fraction of fluorionomer (I-2) is less than 40 % wt, said liquid composition comprising fluoroionomer (I-1) and fluoroionomer (I-2) in a weight ratio (I-1)/(I-2) of at least 2:1.
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
C08L 27/22 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères modifiées par post-traitement chimique
H01M 8/10 - Éléments à combustible avec électrolytes solides
The invention pertains to a fluoroelastomer composition comprising: - at least one fluoroelastomer [fluoroelastomer (A)]; - from 0.1 to 25 phr (with respect to fluoroelastomer (A)) of at least one melt-processable per(halo)fluoropolymer having a melting point of at most 250°C [polymer (F)]; and - optionally at least one (per)fluoropolyether [(per)fluoropolyether (E)]. The Applicant has surprisingly found that the incorporation in the fluoroelastomer composition of the polymer (F) as above described enables easier processing of the fluoroelastomer composition, both in injection moulding and extrusion moulding technologies, yielding improved behaviour in mould release, mould fouling and aspect surface of the moulded parts.
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
C08L 27/16 - Homopolymères ou copolymères du fluorure de vinylidène
C08L 27/18 - Homopolymères ou copolymères du tétrafluoro-éthylène
Vulcanizable fluoroelastomer compositions comprising : A) a fluoroelastomer matrix based on vinylidene fluoride (VDF) with a Mooney viscosity (1+10) at 121°C of less than 35 MU (Mooney Units), preferably less than 25 MU and more preferably less than 20 MU, measured according to ASTM standard D 1646; B) a semi-crystalline fluoropolymer, in an amount of from 20 % to 70 % by weight relative to the total weight of A)+B), preferably from 25 % to 60 % by weight and more preferably from 35 % to 55 % by weight, the semi-crystalline fluoropolymer being constituted of tetrafluoroethylene (TFE) homopolymers and copolymers of TFE with one or more monomers containing at least one unsaturation of ethylenic type, in an amount of from 0.01 to 10 mol % and preferably from 0.05 to 7 mol %, said semi-crystalline fluoropolymer having a mean particle size between 10 and 400 nm, preferably between 40 and 300 nm and more preferably between 60 and 250 nm.
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
C08L 27/16 - Homopolymères ou copolymères du fluorure de vinylidène
C08L 27/18 - Homopolymères ou copolymères du tétrafluoro-éthylène
C08L 51/00 - Compositions contenant des polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneCompositions contenant des dérivés de tels polymères
51.
Process for preparing high purity monocarboxylic perfluoropolyethers
F are as above defined; T, T′, equal to or different from each other, are selected from acyl fluoride or carbonyl-containing functional end groups and non functional end groups to obtain one PFPE fraction of formula (II) wherein the difference between the minimum and the maximum molecular weight of the components is lower than or equal to 600; b) partial fluorination of the fraction obtained in a); c) esterification c1) and/or hydrolysis c2) of the mixture obtained in b); d) distillation of the product obtained in c2) or in c1).
C07C 69/66 - Esters d'acides carboxyliques dont le groupe carboxyle estérifié est lié à un atome de carbone acyclique et dont l'un des groupes OH, O-métal, —CHO, céto, éther, acyloxy, des groupes , des groupes ou des groupes se trouve dans la partie acide
52.
PROCESS FOR PREPARING FINE DRIED POWDERS OF MELT-PROCESSABLE OR NON-MELT-PROCESSABLE TFE (CO)POLYMERS
Process for preparing, in dried form, fine coagulated powders of PTFE homopolymer or of melt-processable or non-melt-processable TFE copolymers, comprising: I) application of fine wet coagulated powders of the polymer in the form of a bed onto the surface of a metal belt, drying of the fine wet powders by means of passing a stream of air through the bed in the direction from the top of the bed to the bottom of the bed; the belt having a mesh size that allows passage of the air and that substantially prevents passage of the fine polymer powder; II) cooling of the dried fine powder; III) removal of the powder from the surface of the metal belt.
−1 of less than 10 Pa sec at a temperature of 280° C. [polymer (B)].
The addition of a TFE copolymer [polymer (B)] of low melt viscosity advantageously enables improvement of rheological behavior of thermoplastic hydrogen-containing fluoropolymer (A), making possible processing in less severe conditions and yielding final parts with outstanding surface aspect and good homogeneity and coherency.
Still objects of the invention are a process for manufacturing said thermoplastic fluoropolymer composition and the articles, such as shaped articles, films, cable sheathing, pipes, flexible pipes, hollow bodies comprising said thermoplastic fluoropolymer composition.
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
The invention pertains to a process for the manufacture of a polyol (per)fluoropolyether derivative [polyol PFPE (PFPE-OH)], said process comprising: 1. reacting at least one triol having two protected hydroxyl functions and a free hydroxyl group [protected triol (PT)] with an activating agent, to yield an activated protected triol [activated protected triol (APT)]; 2. reacting said activated protected triol with a functional (per)fluoropolyether derivative of formula (Ia) [functional PFPE (E)], wherein: Rf represents a fluoropolyoxyalkene chain (chain Rf), i.e. a fluorocarbon segment comprising ether linkages in main chain; T1 and T2, equal to or different from each other, are independently selected from - non-functional groups of formula: -CF3, -CF2-CF3, -CF2CI, -CF2CF2CI, -CF2-COF, -COF : and - functional hydroxyl groups comprising at least one hydroxyl group, with the provisio that at least one of T1 and T2 is a functional hydroxyl group as above detailed; to yield a protected polyol (per)fluoropolyether derivative [protected polyol PFPE (p-PFPE-OH)]; 3. deprotecting said protected polyol PFPE (p-PFPE-OH) to yield the polyol PFPE (PFPE-OH).
Extrudable (per)fluoroelastomer compositions comprising crosslinkable (per)fluoroelastomers having: - at least two glass transition temperatures Tg on DSC analysis, - at least one melting peak on DSC analysis with a H of second melting of between 0.3 and 5.5 J/g and preferably between 0.4 and 4 J/g, - a bimodal molecular weight distribution such that the ratio Mn1/Mn 2 is between 10 and 30 and preferably between 15 and 25, in which Mn1 and Mn2 are as defined in the invention.
C08L 27/16 - Homopolymères ou copolymères du fluorure de vinylidène
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
The invention pertains to a process for the modification of a carbonaceous material [material (C)], said process comprising: - contacting the material (C) with a (per)fluoropolyether peroxide comprising at least one peroxidic moiety comprised between sp3 carbon atoms and at least one fluoropolyoxyalkene chain (chain Rf), i.e. a fluorocarbon segment comprising ether linkages in main chain [peroxide (P)]; - heating the material (C) while in contact with the peroxide (P) at a temperature exceeding decomposition temperature of said peroxide (P). Still an object of the invention is a modified carbonaceous material having chemically bound on its surface at least one fluoropolyoxyalkylene chain (chain Rf).
The invention pertains to a heat transfer composition comprising: - at least one fluorinated ether fluid free from functional groups (fluid (H)); - from 0.01 to 5 % wt with respect to fluid (H) of at least one solid nano-sized additive chosen among metal, metal oxide or carbonaceous material particles, having an average particle size of less than 2 000 nm (additive (N)); - from 0.1 to 10 % wt with respect to fluid (H) of at least one functional (per)fluoropolyether comprising recurring units (R1), said recurring units comprising at least one ether linkage in the main chain and at least one fluorine atom (fluoropolyoxyalkene chain) and comprising at least one functional group (functional PFPE (F)).
Process for preparing aqueous polymer dispersions, comprising: a) aqueous-phase suspension polymerization of TFE, optionally in the presence of one or more ethylenically unsaturated comonomers, in the presence of a radical initiator, without the initial addition of fluorinated surfactants, without the addition of fluorinated surfactants during the polymerization, and without any in situ formation of fluorinated surfactants.
Aromatic hydrogenated polymers comprising perfluoropolyether (PFPE) chains bonded to the aromatic rings to form sequences randomly distributed in the polymer structure, having the formula (I): (T1-CF2O-Rf-CF2)n-T3 in which: n is an integer from 1 to 10, T1 is an aromatic group of the backbone of the hydrogenated polymer, or alternatively condensed aromatic groups, T3 may be equal to T1, or alternatively a functional group -COOH or -COF, Rf is a (per)fluoropolyoxyalkylene chain, in which the starting hydrogenated aromatic polymers are obtained by polycondensation, stepwise polyaddition or polyaddition of cyclic monomers in which the ring is formed by at least 3 atoms.
C08F 283/00 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères prévus par la sous-classe
C08G 63/91 - Polymères modifiés par post-traitement chimique
C08G 69/48 - Polymères modifiés par post-traitement chimique
C08G 85/00 - Procédés généraux pour la préparation des composés prévus dans la présente sous-classe
C08L 101/04 - Compositions contenant des composés macromoléculaires non spécifiés caractérisées par la présence de groupes déterminés contenant des atomes d'halogènes
The invention pertains to a composition useful for imparting durable stain repellence and soil release properties to textile substrates, said composition comprising: (A) at least one fluorinated ionisable polyurethane polymer [polymer (PUR)] comprising at least one fluorinated block comprising a fluoropolyoxyalkene chain [chain (Rof)], and at least one functional block comprising an hydrocarbon chain [chain (RHC)] having from 2 to 14 carbon atoms, optionally comprising one or more aromatic or cycloaliphatic group, said chain (RHC) comprising at least one ionisable group, said blocks being linked by urethane moieties of formula (I): wherein E is a divalent hydrocarbon carbon group, linear or branched, optionally comprising aromatic rings, said polymer (PUR) being free from perfluoroalkyl chains [chain (Rf)]; (B) at least one fluorocarbon polymer [polymer (F)] comprising at least one perfluoroalkyl chain [chain (Rf)] linked by one or more ester moiety of formula (II) and/or urethane moiety of formula (III) and/or urea moiety of formula (IV): (C) at least one crosslinking agent. Still object of the invention are the use of said composition for treating textile substrates and the textile substrates obtained therefrom.
C08G 18/12 - Procédés mettant en œuvre un prépolymère impliquant la réaction d'isocyanates ou d'isothiocyanates avec des composés contenant des hydrogènes actifs, dans une première étape réactionnelle utilisant plusieurs composés contenant un hydrogène actif dans le premier stade de la polymérisation
The invention pertains to a fuser system member comprising an outer layer comprising a tetrafluoroethylene (TFE) polymer [polymer (F)], said polymer (F) comprising: - recurring units derived from TFE; and - from 6.5 to 20 % wt of recurring units derived from at least one perfluoromonomer [monomer (CM)] chosen among: (i) perfluoroalkylvinylethers complying with formula CF2=CFORf1, in which Rf1 is a C1-C6 perfluoroalkyl, e.g. -CF3, -C2F5, -C3F7 and/or (ii) perfluoro-oxyalkylvinylethers complying with formula CF2=CFOX0, in which X0 is a C1-C12 perfluorooxyalkyl having one or more ether groups, like perfluoro-2-propoxy-propyl; and (iii) mixtures thereof. Other objects of the invention are a process for the manufacture of said fuser system member and an image forming apparatus comprising said fuser system member.
The invention pertains to a light source having shatterable encasement means comprising an outer layer comprising a tetrafluoroethylene (TFE) polymer [polymer (F)], said polymer (F) comprising:- recurring units derived from TFE; and - from 6.5 to 35 % wt of recurring units derived from at least one perfluoromonomer [monomer (CM)] chosen among:(i) perfluoroalkylvinylethers complying with formula CF2=CFORf1, in which Rf1 is a C1-C6 perfluoroalkyl, e.g. -CF3, -C2F5, -C3F7; and/or (ii) perfluoro-oxyalkylvinylethers complying with formula CF2=CFOX0, in which X0 is a C1-C12 perfluorooxyalkyl having one or more ether groups, like perfluoro-2-propoxy-propyl; and (iii) mixtures thereof. Another object of the invention is a process for the manufacture of said light source.
The present invention pertains to a linear semi-crystalline copolymer [polymer (A)] comprising recurring units derived from vinylidene fluoride (VDF) monomer and at least one hydrophilic (meth)acrylic monomer (MA) of formula (I) wherein each of R1, R2, R3, equal or different from each other, is independently an hydrogen atom or a C1-C3 hydrocarbon group, and ROH is a hydrogen or a C1-C5 hydrocarbon moiety comprising at least one hydroxyl group, said polymer (A) comprising from 0.05 to 10 % by moles of recurring units derived from said hydrophilic (meth)acrylic monomer (MA) and being characterized by a fraction of randomly distributed units (MA) of at least 40 %, having improved thermal stability, to a process for its manufacture, to a composition comprising the same, and to its use as binder in batteries or for the manufacture of hydrophilic membranes.
The present invention pertains to a solar cell module comprising at least one photovoltaic element (4) encapsulated between a front layer (3) on its light- receiving surface side and a back layer (3), said front layer comprising at least one layer comprising a tetrafluoroethylene (TFE).polymer [polymer (F)], said polymer (F) comprising: - recurring units derived from TFE; and - from 15 to 25 % wt of recurring units derived from at least one perfluoromonomer [monomer (CM)] chosen among: ' (i) perfluoroalkylvinylethers complying with formula CF
A process for preparing perfluoropolyethers of formula T-O-(R F) z-T' wherein: T, T' are end groups, z = 0 or 1; RF is a perfluoro(poly)oxyalkylene chain containing one or more fluorooxyalkylene repeating units selected from (CF2O), -(CF(CF3)O)-, -(CF2CF2O)-, -(CF2CF(CF3)O)-, -(CF(CF3)CF2O)-, -(CF2CF2CF2O)-, -(CF2CF2CF2CF2O)-, -(CF2) j-CFZ-O- wherein j is an integer from 0 to 3 and Z is a fluorooxyalkylene chain comprising from 1 to 20 repeating units selected from the above reported fluorooxyalkylene units; comprising the reduction of peroxidic perfluoropolyethers comprising one or more of the above defined repeating units by using gaseous hydrogen in the presence of a catalyst comprising one or more metals of the VIII group supported on graphitic materials.
The invention pertains to a process for operating a polymer electrolyte membrane fuel cell (PEMFC), said PEMFC comprising:(a) a membrane comprising at least one fluorinated ionomer [polymer (I)] comprising recurring units derived from tetrafluoroethylene (TFE) and from at least one monomer of formula (M): wherein m is an integer between 1 and 6 and X' is chosen among halogens (Cl, F, Br, I), -O-M+, wherein M+ is a cation selected among H+, NH4 +, K+, Li+, Na+or mixtures thereof, said polymer (I) having an equivalent weight (EW) of from 700 to 850 g/eq.; (b) a cathode; (c) an anode; said process comprising: (i) feeding gaseous reactants at the electrodes at a relative humidity of at most 66 %; (ii) maintaining an average current density between 0.05 and 1.5 A/cm2; and(iii) maintaining an average temperature of more than 65 °C.
H01M 8/1027 - Matériaux d’électrolyte polymère caractérisés par la structure chimique de la chaîne principale du polymère conducteur ionique comprenant du carbone, de l’oxygène et d’autres atomes, p. ex. des polyéthersulfones sulfonés [S- PES]
H01M 8/1039 - Matériaux d’électrolyte polymère halogénés, p. ex. des fluorures de polyvinylidène sulfonés
67.
PROCESS FOR OPERATING A FUEL CELL IN DRY CONDITIONS
The invention pertains to a process for operating a polymer electrolyte membrane fuel cell (PEMFC), said PEMFC comprising:(a) a membrane comprising at least one fluorinated ionomer [polymer (I)] comprising recurring units derived from tetrafluoroethylene (TFE) and from at least one monomer of formula (M): wherein m is an integer between 1 and 6 and X' is chosen among halogens (Cl, F, Br, I), -O-M+, wherein M+ is a cation selected among H+, NH4+, K+, Li+, Na+or mixtures thereof, said polymer (I) having an equivalent weight (EW) of from 700 to 850 g/eq.; (b) a cathode; (c) an anode; said process comprising: (i) feeding gaseous reactants at the electrodes at a relative humidity of at most 66 %; (ii) maintaining an average current density between 0.05 and 1.5 A/cm2; and(iii) maintaining an average temperature of more than 65 °C.
The invention hereby provides a method for the manufacture of a material, said method comprising a polymerization step of a dispersion comprising: - at least one polymerizable organic monomer free from fluorine groups [monomer (MA)]; - from 50 to 79 % wt (based on the dispersion) of inorganic filler particles; - from 0.1 % to 10.0% wt (based on the dispersion) of an organic monomer comprising at least a fluorinated group and at least an ethylenically unsaturated group [monomer (F)]. The Applicant has surprisingly and unexpectedly found that the incorporation of monomer (F) in the dispersion as above described enables obtaining a material having all advantageous features of marble-like materials of the prior art, but also possessing outstanding stain resistance and clean-ability properties.
Fluorinated lubricants of formula T-O-[A-B]z-[A-B']z'-A-T' (I) wherein: A = -(X)a-O-A'-(X')b- A' is a perfluoropolyether chain comprising units (CF2O), (CF2CF2O), (CF2CF2CF2O), (CF2CF2CF2CF2O); X, X' = -CF2-, -CF2CF2-; a, b = 0 or 1; B derives from olefins, of which at least one homopolymerizable by radical route, of formula: -[(CR1R2-CR3R4)j(CR5R6-CR7R8)j']- (Ia) wherein j = 1-5, j'= 0-4 and 2 ឬ(j+j')ឬ 5; R1-R8 = halogen, H, C1-C6 (per)haloalkyl, C1-C6 alkyl, C1-C6 oxy(per)-fluoroalkyl; z ≥ 2; z' is 0 or an integer; z, z' are such that the number average molecular weight of the polymer of formula (I) is in the range 500-500,000; B'= (Ia) but at least one of R1-R8 has a meaning different than that in B and 2 ≤(j+j')ឬ 5; T, T' = C1-C3 perfluoroalkyl, C1-C6 alkyl and compositions thereof.
C08F 283/06 - Composés macromoléculaires obtenus par polymérisation de monomères sur des polymères prévus par la sous-classe sur des polyéthers, des polyoxyméthylènes ou des polyacétals
C08F 293/00 - Composés macromoléculaires obtenus par polymérisation sur une macromolécule contenant des groupes capables d'amorcer la formation de nouvelles chaînes polymères rattachées exclusivement à une ou aux deux extrémités de la macromolécule de départ
Polymeric compositions comprising: 1) at least one thermoprocessable semicrystalline halo-polymer; 2) an additive in amounts between 0.01 and 10% by weight of 1) one or more (per)fluoropolyether polymers of formula Q-O-[A-B]z-[A-B']z'-A-Q' (I) wherein: A = -(X)a-O-A'-(X')b- wherein A' is a perfluoropolyether chain; X, X' = -CF2-, -CF2CF2-, -CF(CF3)-; a, b = 0 or 1; B derives from one or more olefins, of which at least one homopolymerizable by radical way, of formula: -[(CR1R2-CR3R4)j(CR5R6-CR7R8)j']- (Ia) wherein j = 1-30, j'= 0-29, with the proviso that 2 ឬ(j+j')ឬ 30; R1-R8 = halogen, H, C1-C6 (per)haloalkyl, C1-C6 alkyl, C1-C6 oxy(per)fluoroalkyl; B' = (Ia) but at least one of R1-R8 has a meaning different from that in B, and 2 ≤(j+j')ឬ30; z ≥ 2; z' is 0 or an integer; z, z' are such that the number average molecular weight of (I) is between 500 and 500,000; Q, Q'= C1-C3 perfluoroalkyl; C1-C6 alkyl; or functional end group(s).
C08L 27/00 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères
C08L 23/00 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures aliphatiques non saturés ne possédant qu'une seule liaison double carbone-carboneCompositions contenant des dérivés de tels polymères
Polymers of formula (I) Q-O-[A-B]z-[A-B']z'-A-Q' (I) wherein: - A = -(X)a-O-A'-(X')b- with A'= perfluoropolyether chain and X, X'= -CF2-, -CF2CF2-; a, b = 0.1 with the proviso that a = 1 if A is linked to Q-O-; b = 0 when A is linked to Q'; - B derives from homopolymerizable olefins by radical route, of formula: -[(CR1R2-CR3R4)j(CR5R6-CR7R8)j']- (Ia) wherein j is an integer from 1 to 30, j' is an integer from 0 to 29 with the proviso that (j+j') is higher than 2 and lower than 30; R1-R8 are halogen; H; C1-C6 (per)haloalkyl; C1-C6 alkyl; C1-C6 oxy(per)fluoroalkyl; B'= B but at least one among R1-R8 has a meaning different from that in B; - z, z' are such that the number average molecular weight of the polymer of formula (I) is between 500 and 150,000; - Q, Q'= C1-C3 (per)fluoroalkyl or functional end group -(CFW)-Dq-Tk; W = F, CF3; k and q are integers, k ranges from 1 to 4, preferably 1 or 2, q is an integer and is equal to 0 or 1; with the proviso that at least one of Q, Q' is functional end group.
The invention pertains to a process for stabilizing a semi-crystalline fluoropolymer comprising ion exchange groups, said process comprising: suspending at least one semi-crystalline fluoropolymer having ion exchange groups [polymer (I)] in at least one fluorinated organic dispersing medium [medium (M)] so as to obtain a dispersion (D) of polymer (I) in a dispersing medium (M); contacting said dispersion (D) with fluorine under irradiation with U. V. radiation so as to obtain a stabilized polymer. Still objects of the invention are a stable semi-crystalline fluoropolymer as above defined having a low amount of unstable ends groups of -COF type, the use of the stabilized fluoropolymer obtained by the process or of the stable fluoropolymer in fuel cells devices, a membrane and a membrane-electrode assembly comprising said fluoropolymers.
The invention pertains to a fluoropolymer composition (C) comprising: at least one functional fluoropolymer [polymer (I)], said polymer comprising: recurring units derived from at least one ethylenically unsaturated monomer comprising at least one fluorine atom (fluorinated monomer, hereinafter); and a substantial amount of recurring units derived from at least one ethylenically unsaturated monomer comprising at least one cation exchange group (functional monomer, hereinafter); and at least one cerium compound [compound (O)]. Still objects of the invention are a process for the manufacture of said composition and the use of the same as catalyst.
C08K 3/00 - Emploi de substances inorganiques en tant qu'adjuvants
C08L 27/12 - Compositions contenant des homopolymères ou des copolymères de composés possédant un ou plusieurs radicaux aliphatiques non saturés, chacun ne contenant qu'une seule liaison double carbone-carbone et l'un au moins étant terminé par un halogèneCompositions contenant des dérivés de tels polymères non modifiées par un post-traitement chimique contenant du fluor
c) hot lamination of two rolls (B) with the roll (A); the step being carried out so that the perimeter of the openings of the two rolls (B) falls inside the area of the electrocatalytic layers, and obtaining a roll (C), wherein on each of the two surfaces of the sheet formed of a CCM sequence (roll (A)) a subgasket sheet (roll (B)) is applied.
by tetrafluoroethylene (TFE) photooxidation in the presence of UV light, at a temperature from −80° C. to −40° C., in the presence of a mixture of solvents formed of HFC-227 (hepta-fluoropropane) and a solvent selected between HFC-125 (pentafluoroethane) and FC-218 (perfluoropropane).
C08G 73/00 - Composés macromoléculaires obtenus par des réactions créant dans la chaîne principale de la macromolécule une liaison contenant de l'azote, avec ou sans oxygène ou carbone, non prévus dans les groupes
C08G 73/24 - Copolymères d'un composé organique fluoronitrosé et d'un autre composé organique fluoré, p. ex. caoutchoucs nitrosés
A process for separating bifunctional perfluoropolyethers (PFPEs) having two terminations -CH2OH from their mixtures with monofunctional PFPEs with one termination -CH2OH, of general formula X1-O-Rf-Y (I) wherein Rf is a perfluoropolyoxyalkylene chain having a number average molecular weight of 500-10,000; X1 and Y are end groups selected from -CFXCH2OH (wherein X is F or CF3), -CF3, -CF2Cl, -CF2CF2Cl, -C3F6Cl, -CF2Br, -CF2CF3, wherein at least one of the two end groups is -CFXCH2oH, said process comprising the steps of: a) addition of the PFPE mixture to an adsorbing solid phase, under stirring; b) filtration of the mixture obtained in a): c) addition to the solid phase filtered in b), of a PFPE mixture having an average functionality higher than that of the PFPE mixture of the liquid filtered in b); c2) filtration of the mixture obtained in c); and subsequent treatment of the solid phase separated in c2) with a polar solvent obtaining a liquid containing the PFPE having high functionality.
Fluoroelastomers comprising in the polymer chain units deriving from fluorovinyl ethers having the formula:
CFX═CXOCF2OR (I)
wherein R is a C2-C6 linear, branched or C5-C6 cyclic (per) fluoroalkyl group, or a C2-C6 linear, branched (per) fluorooxyalkyl group containing from one to three oxygen atoms; when R is fluoroalkyl or fluorooxyalkyl group as above defined, it can contain from 1 to 2 atoms, equal or different, selected from the following: H, Cl, Br, I; X═F, H.
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