A fiber reinforced polyester polymer composition is disclosed that contains at least one tribological modifier. The tribological modifier may comprise an ultra-high molecular weight silicone alone or in combination with polytetrafluoroethylene particles. The composition not only has excellent tensile properties but also can produce a low friction surface.
C08J 5/04 - Renforcement des composés macromoléculaires avec des matériaux fibreux en vrac ou en nappes
C08L 67/03 - Les acides dicarboxyliques et les composés dihydroxylés ayant les groupes hydroxy et carboxyliques liés directement à des cycles aromatiques
A water soluble polyoxymethylene copolymer is described. In one embodiment, the polyoxymethylene copolymer is a liquid at 35°C and is water soluble. The polyoxymethylene copolymer may have a comonomer content of greater than about 60% by weight, such as greater than about 70% by weight, such as greater than about 80% by weight. The copolymer is usually formed using a chain transfer agent. The polyoxymethylene copolymer can be formed so as to have a relatively low molecular weight and have a relatively great amount of end groups or terminal groups. For instance, the copolymer may contain end groups in an amount greater than 300 mmol/kg.
C08G 4/00 - Polymères de condensation d'aldéhydes ou de cétones et de poly-alcoolsPolymères d'addition de composés hétérocycliques oxygénés contenant dans leur cycle au moins une fois le groupement —O—C—O—
C08G 2/04 - Polymérisation en présence de composés agissant sur le poids moléculaire, p. ex. agents de transfert de chaîne
C08G 2/10 - Polymérisation d'oligomères cycliques du formaldéhyde
C10M 107/30 - Composés macromoléculaires obtenus par des réactions autres que celles faisant intervenir uniquement des liaisons non saturées carbone-carbone
A tribologically modified ultrahigh molecular weight polyethylene (UHMW-PE) polymer composition is disclosed, The UHMW-PE polymer composition is comprised of an UHMW-PE poliymer and at least one tribological modifier. The tribological modifier may be comprised of a silicone powder, a silicone oil, an olefin oligomer, an ultrahigh molecular weight silicone, or any combination thereof. The composition and polymer article produced therefrom may exhibit improved tribological properties, such as a reduced coefficient of friction and low wear, when contacted against a counter-material in comparison to an unmodified UHMW-PE polymer composition.
A tribologically modified polyoxymethylene polymer composition is disclosed. The polyoxymethylene polymer composition is comprised of a polyoxymethylene polymer and at least one tribological modifier. The tribological modifier may comprise at least one tribological modifier comprising an ultra-high molecular weight silicone having a kinematic viscosity of greater than 100,000 mm2s-1. The composition may exhibit a dynamic coefficient of friction against a counter-material of from about 0.01 to about 0.15. The polyoxymethylene polymer compositions provide polymer articles with improved tribological properties and mechanical properties.
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
A two component polyoxymeihylene based system is disclosed. The two component system is comprised of a first polymer layer and a second polymer layer. The first polymer layer is comprised of a polyoxymeihylene polymer composition comprising a polyoxymethylene polymer and optionally a tribological modifier. The second polymer layer is comprised of a second polymer composition comprising a liquid crystalline polymer, a polyarylene sulfide polymer, or a combination thereof and at least one tribological modifier, The compositions provide polymer articles, such as conveyor components, with improved tribological properties.
B32B 27/28 - Produits stratifiés composés essentiellement de résine synthétique comprenant des copolymères de résines synthétiques non complètement couverts par les sous-groupes suivants
B32B 27/42 - Produits stratifiés composés essentiellement de résine synthétique comprenant des résines de condensation d'aldéhydes, p. ex. avec des phénols, des urées ou des mélamines
6.
PROCESS FOR PRODUCING POLYOXYMETHYLENE POLYMERS WITH LONG-CHAIN ALKYL END GROUPS, AND POLYMERS MADE THEREFROM
A polyoxymethylene polymer is disclosed that contains long-chain alkyl end groups. The polyoxymethylene polymer may be formed by using a Bis-alkylformal as a chain transfer agent during production of the polymer. In one embodiment, the Bis-alkylformal is dissolved In a monomer, such as trioxane, during production of the polymer. In one embodiment a branching agent may also be present with one or more monomers for producing a branched polyoxymethylene polymer. In this manner, greater amounts of alkyl end groups can be incorporated into the polymer. The resulting polymer has excellent flow characteristics. The polymer may be used to form various molded articles with excellent tribological properties.
C08G 2/00 - Polymères d'addition d'aldéhydes ou de leurs oligomères cycliques ou de cétonesLeurs copolymères d'addition avec moins de 50 moles % d'autres substances
C08G 2/30 - Modification chimique par post-traitement
7.
POLYOXYMETHYLENE POLYMER WITH LONG CHAIN ALKYLENE GLYCOL END GROUPS
A polyoxymethylene polymer is disclosed that contains long-chain alkylene glycol end groups. The polyoxymethylene polymer may be formed by using a Bis- oligo-alkylene glycol-formal as a chain transfer agent during production of the polymer. The end groups on the polyoxymethylene polymer may comprise ethylene oxide end groups and/or propylene oxide end groups. The resulting polymer has excellent flow characteristics and may be used as a flow additive for other thermoplastic polymers. Alternatively, the polymer may be used to form various molded articles with excellent tribological properties.
C08G 2/00 - Polymères d'addition d'aldéhydes ou de leurs oligomères cycliques ou de cétonesLeurs copolymères d'addition avec moins de 50 moles % d'autres substances
C08G 2/38 - Polymères séquencés ou greffés, préparés par polymérisation d'aldéhydes ou de cétones sur des composés macromoléculaires
C10M 145/20 - Polymères de condensation d'aldéhydes ou de cétones
8.
FIBER REINFORCED POLYOXYMETHYLENE COMPOSITION WITH IMPROVED THERMAL PROPERTIES
The present disclosure relates to a molding composition and to molded products made from the composition. In accordance with the present disclosure, the polymer composition contains a polyoxymethylene copolymer having a relatively low amount of comonomer units. The polyoxymethylene polymer is combined with at least one reinforcing fiber and a coupling agent. The above polymer produces a composition have a relatively high heat deflection temperature, while also having excellent mechanical properties.
C08J 5/10 - Renforcement des composés macromoléculaires avec des matériaux fibreux en vrac ou en nappes caractérisé par les additifs utilisés dans le mélange de polymères
The present invention relates to a composition comprising a) at least one polyoxymethylene (A) having terminal OH-groups of more than 15 mmol/kg, b) at least one coupling agent (B), c) one or more hindered amine light stabilizer (C) having a molecular weight ranging from 500 to 1000 g/mol, and d) optionally at least one reinforcing fiber (D).
Disclosed is a tribologically modified molding composition, a method for the manufacturing of molded article by melt mixing said molding composition, molded article obtainable therefrom as well as the use of the molding composition for the manufacturing of molded parts used in the automotive industry or for housings, latches, window winding systems, wiper systems, pulleys, sun roof systems, seat adjustments, levers, gears, claws, pivot housings, wiper arms, brackets or seat rails bearings, gears, cams, rollers, sliding elements such as sliding plates, conveyer belt parts such as chain elements and links, castors, fasteners, levers, conveyor system wear strips and guard rails.
H01B 1/24 - Matériau conducteur dispersé dans un matériau organique non conducteur le matériau conducteur comportant des compositions à base de carbone-silicium, du carbone ou du silicium
11.
PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE
In a process for producing polyethylene, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition comprising a particulate support and a Group 4 metal complex of a phenolate ether ligand carried by the support and present in an amount so as to provide about 0.1 to about 35 μιηοΐ of Group 4 metal per gram of the support. The resultant polyethylene has a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, an average particle size, d50, of less 300 microns, preferably about 100 to 250 microns, and a span, log10(d90/d10), of less than 0.4.
The present invention relates to a process for producing cyclic acetal comprising i) preparing a liquid reaction mixture comprising a) formaldehyde source, b) an aprotic compound and c) a catalyst; and ii) converting the formaldehyde source into cyclic acetals.
The present invention relates to a process for producing cyclic acetal comprising i) preparing a reaction mixture comprising a) a formaldehyde source in a liquid medium and b) a catalyst; ii) converting the formaldehyde source into cyclic acetals, wherein the final conversion of said formaldehyde source to said cyclic acetal is greater than 10% on basis of the initial formaldehyde source.
A process for producing cyclic acetals is described. A formaldehyde source is contacted with an aprotic compound in the presence of a catalyst to produce the cyclic acetals. The aprotic compound can increase conversion rates and/or efficiency. In one embodiment, the formaldehyde source is obtained from methanol. In particular, methanol can be converted into formaldehyde which is then converted into a cyclic acetal. In one embodiment, the cyclic acetal can then be used to produce oxymethylene polymers.
A process for recovering volatile components from an oxymethylene polymer process is disclosed. The volatile components are removed from the process and the formaldehyde collected is converted to a cyclic acetal. The formaldehyde is converted to a cyclic acetal by contacting the formaldehyde with a catalyst in the presence of an aprotic solvent.
The present invention relates to a process for producing cyclic acetal comprising i) preparing a liquid reaction mixture comprising a) a formaldehyde source, b) an aprotic compound and c) a catalyst; wherein the total amount of protic compounds is less than 40 wt.-%, based on the total weight of the reaction mixture; and ii) converting the formaldehyde source into cyclic acetals.
A process for producing a cyclic acetal is disclosed. According to the process, a formaldehyde source is combined with an aprotic compound and contacted with a heterogeneous catalyst which causes the formaldehyde source to convert into a cyclic acetal such as trioxane. The catalyst, for instance, may comprise a solid catalyst such as an ion exchange resin. In one embodiment, the process is used for converting anhydrous formaldehyde gas to trioxane. The anhydrous formaldehyde gas may be produced form an aqueous formaldehyde solution by an extractive distillation.
A process for recycling polyoxymethylene polymers is disclosed. A polyoyxmethylene polymer is at least partially dissolved in an aprotic compound. The resulting solution or suspension (liquid mixture) is then contacted with a catalyst which causes the polyoxymethylene polymer to be converted into a cyclic acetal. The cyclic acetal can be separated, collected and used in other processes. In one embodiment, the cyclic acetal may be used to produce a polyoxymethylene polymer.
The present invention relates to a molding composition, a process for the manufacturing of said molding composition, molded parts obtainable therefrom as well as the use of the molding composition for the manufacturing of molded parts used in the automotive industry, for housings, latches, window winding systems, wiper systems, sun roof systems, seat adjustments, levers, gears, claws, pivot housing or wiper arms.
The present invention relates to a method for the manufacturing of a container or parts of a container for fuel or compressed gases by extrusion blow molding and container or parts of container for fuel or compressed gases made thereof.
C08G 18/79 - Polyisocyanates ou polyisothiocyanates contenant des hétéro-atomes autres que l'azote, l'oxygène ou le soufre de l'isocyanate ou de l'isothiocyanate de l'azote caractérisés par le polyisocyanate utilisé, celui-ci contenant des groupes formés par oligomérisation d'isocyanates ou d'isothiocyanates
The present invention relates to a molding composition, molded parts obtainable therefrom as well as the use of the molding composition for the manufacturing of molded parts used in the automotive industry, as well as for cables, pipes, tubes, corrugated pipes, fuel pipes, air pipes, fuel hoses, break hoses, air hoses, hydraulic hoses, pneumatic hoses, pressure hoses, and connection assemblies.
The present invention relates to a molding composition, a process for the manufacturing of said molding composition, molded parts obtainable therefrom as well as the use of the molding composition for the manufacturing of molded parts used in the automotive industry, for housings, latches, window winding systems, wiper systems, pulleys, sun roof systems, seat adjustments, levers, gears, claws, pivot housing, brackets, wiper arms or seat rails.
In a process for producing polyethylene having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition in at least one hydrocarbon. The catalyst composition comprises a Group 4 metal complex of a phenolate ether ligand and the slurry includes from about 5 to less than 40 ppm per liter of a compound effective to increase the conductivity of said at least one hydrocarbon.
In a process for producing high molecular weight polyethylene, ethylene is contacted with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand under polymerization conditions comprising a temperature of about 20 °C to less than 90 °C and a pressure of about 4 bar to about 40 bar.
In a process for producing an elongated polyethylene component, such as a fiber or membrane, polyethylene powder having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020 is dissolved in a solvent to produce an extrudable solution. The solution is then extruded through a die to form an elongated component and at least part of said solvent is removed from the elongated component. The polyethylene powder used in the process is produced by polymerizing ethylene in the presence of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
D01F 6/04 - Filaments, ou similaires, faits par l’homme, à un seul composant, formés de polymères synthétiquesLeur fabrication à partir d'homopolymères obtenus par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carbone à partir des polyoléfines
C08F 4/64 - Titane, zirconium, hafnium ou leurs composés
In a process for producing polyethylene having a molecular weight of at least 1 x 106 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition comprising a particulate support having an average particle size, d50, of less than 58 microns and a Group 4 metal complex of a phenolate ether ligand carried by the support.
A shaped article, suitable for in a prosthetic device, is formed of polyethylene having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, and has a yield strength greater than 20 as determined by DIN EN ISO 527. The polyethylene is produced by polymerizing ethylene in the presence of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
Ultra-high molecular weight polyethylene has a molecular weight greater than 20 x 106 gm/mol as determined by ASTM 4020 or by size exclusion chromatography (SEC) and is produced by polymerizing ethylene with a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
In a process for producing polyethylene having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand, wherein the slurry further includes a scavenger comprising an alkyl magnesium compound.
The invention relates to a modular container for preparing foods to be cooked, in particular baked goods, comprising a self-supporting base plate (1) that has an extension in a plane, and bordering elements (4, 5, 6) that extend out from the plane and are connected removably to the base plate (1).
The invention relates to oxymethylene copolymers having a large part of alkyl ether terminal groups, and hydroxy alkylene terminal groups. Said polymers are characterised by high thermal stability and high hot water resistence. The invention also relates to a method for producing oxymethylene copolymers, according to which the polymerisation of at least one monomer forming a -CH2-O- unit is carried out in the presence of at least one acetal of formaldehyde and at least one initiator of cationic polymerisation, the quantity of initiators of the cationic polymerisation being less than 10-4 mol %, in relation to the quantity of monomers forming -CH2-O- units at the beginning of the polymerisation; starting materials of the polymerisation are selected such that the water and formic acid contents at the beginning of the polymerisation are less than 40 ppm; and the initiator and/or the active polymer chains are deactivated by treating the produced polymer with a protic solvent containing a base.
The invention relates to a method and a device for producing oxymethylene polymers. Said method includes the polymerisation of monomers forming an oxymethylene group, optionally in the presence of a cyclic acetal, together with an acetal of formaldehyde and an initiator of the cationic polymerisation, preferably in a gas-tight kneader or extruder. The temperature course of the polymerisation is worked out such that the polymerisation mixture which is at first heterogeneous due to a precipitated polymer is converted into a homogeneous phase at the end of the polymerisation. The homogeneous phase containing the polymer in a liquid form is stabilised by the addition of deactivators. Once volatile constituents have been removed, oxymethylene polymers with high thermal stability and good mechanical properties are obtained. The oxymethylene polymers can be produced in an energetically favourable manner and the properties thereof can be adjusted in a targeted manner during the polymerisation by setting the temperature profile.
Moulding compositions and the mouldings produced therefrom containing a) polyoxymethylene in which at least 50% of the end groups are hydroxyl groups and which has a melt flow index MVR of less than 20 cm3/10 minutes, measured in accordance with ISO 1133 at 190°C and 2.16 kg, and has a proportion of low molecular weight constituents having molecular weights below 10 000 dalton of less than 15% by weight, based on the total mass of the polyoxymethylene, and b) a thermoplastic elastomer are described. The mouldings produced from these moulding compositions have a very high notched impact strength.
The invention relates to oxymethylene polymers which are distributed bimodally or higher and have a target low-molecular part of between 1 and 5 mass percent. Moulded bodies consisting of said polymers are characterised by high low-temperature impact strength combined with a high elasticity modululus.
A long-fibre-reinforced, thermoplastic moulding compound of plastics material has outstanding impact strength and notched impact strength if it contains 30 to 90% by weight of at least one thermoplastic polyolefin, 9 to 69% by weight of at least one glass-like reinforcing fibre and 1 to 30% by weight of at least one mineral filler of an average particle size in the range from 0.1 to 2 쎽m. The moulding compound is produced by the pultrusion method and is used in the production of domestic appliances such as washing machines or washer-dryers or electrical appliances such as coffeemakers or toasters or refrigerators or in automobile construction.
B29C 70/02 - Façonnage de matières composites, c.-à-d. de matières plastiques comprenant des renforcements, des matières de remplissage ou des parties préformées, p. ex. des inserts comprenant des combinaisons de renforcements et de matières de remplissage dans une matrice, formant une ou plusieurs couches, avec ou sans couches non renforcées ou non remplies
B29C 70/52 - Pultrusion, c.-à-d. façonnage et compression par traction continue à travers une matrice
C08J 5/10 - Renforcement des composés macromoléculaires avec des matériaux fibreux en vrac ou en nappes caractérisé par les additifs utilisés dans le mélange de polymères
C08K 3/00 - Emploi de substances inorganiques en tant qu'adjuvants
Disclosed is a cationic polymerization initiator containing a salt of a protonic acid in addition to a protonic acid. The molar ratio between the protonic acid and the salt ranges from 1:0.01 to 1:2000. The initiator according to the invention is used for cationically homopolymerizing or copolymerizing trioxane, for example, and allows the polymerization process to be carried out in a stable and flexible manner.
C08F 4/06 - Composés métalliques autres que les hydrures et autres que les composés organiques de métalComplexes d'halogénures de bore ou d'halogénures d'aluminium avec des composés organiques contenant de l'oxygène
C08F 4/10 - Composés métalliques autres que les hydrures et autres que les composés organiques de métalComplexes d'halogénures de bore ou d'halogénures d'aluminium avec des composés organiques contenant de l'oxygène de métaux alcalino-terreux, de zinc, de cadmium, de mercure, de cuivre ou d'argent
An apparatus and method are disclosed relating to a multi-layer flexible pipe for conveying a target fluid. The pipe includes a core layer arranged to provide an inner bore along which a fluid can flow and at least one barrier layer having a tensile elongation at yield of greater than 5% at a temperature of 23°C.
F16L 11/04 - Manches, c.-à-d. tuyaux flexibles en caoutchouc ou en matériaux plastiques flexibles
B29C 47/00 - Moulage par extrusion, c. à d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désirée; Appareils à cet effet (moulage par extrusion-soufflage B29C 49/04)
38.
METHOD FOR PRODUCING OXYMETHYLENE-POLYMERS IN THE HOMOGENEOUS PHASE AND USE THEREOF
The invention relates to a method and to a device for producing oxymethylene-polymers. Said method consists of polymerising monomers forming oxymethylene groups together with an acetal of formaldehyde and an initiator of cationic polymerisation in the homogeneous phase upto 90 % of the maximal conversion, and deactivating the reaction mixture. The obtained oxymethylene-polymers comprise alkyl ether-end groups and are extremely stable.
The invention relates to a device for producing oxymethylene-homo-and-copolymers. Said method consists of heterogeneously polymerising a monomer forming oxymethylene groups together with an acetal of formaldehyde and an initiator of the cationic polymerisation, then deactivating the polymer in the homogeneous phase by treating it with a basic aprotic solvent or with an aprotic solvent which contains a base. The invention also relates to oxymethylene-homopolymers having a very high stability.
The invention relates to producing ultra-high molecular weight polymers by polymerising and copolymerising olefins with the aid of special bridged metallocene catalysts and the catalytic systems thereof.
C08F 4/6192 - Composant couvert par le groupe contenant une liaison métal de transition-carbone contenant au moins un cycle cyclopentadiényle, condensé ou non, p. ex. un cycle indényle ou fluorényle
41.
LOW-EMISSION, TRIBOLOGICALLY MODIFIED POLYOXYMETHYLENE MOULDING COMPOUNDS AND MOULDINGS PRODUCED FROM THEM
The invention relates to mouldings or moulding compounds of polyoxymethylene which feature low formaldehyde emission, containing 0.1% - 50.0% by weight of a tribological modifier, 0.01% - 0.5% by weight of a cyclic stabilizer containing at least one nitrogen atom in the ring, and 0.05% - 1% by weight of at least one ester of a polyhydric alcohol and at least one (C10-C32) fatty acid, and also to their production and use.
The invention relates to compositions containing: a) polyoxymethylene; b) thermoplastic elastomer with active hydrogen atoms; c) polyoxymethylene, which contains active hydrogen atoms and which differs from constituent a); d) a reagent for covalently coupling constituents b) and c), and; e) optionally one impact resistance modifier that differs from constituent b). The compositions are characterized by having an improved toughness and can be used for producing shaped parts.
The invention relates to a device for producing homopolymers and copolymers of polyoxymethylene. Said device comprises the following elements: A) a reactor (1) having a polymerization zone (2) and a directly adjacent deactivation zone (2) for the polymerization and deactivation of homopolymers and copolymers of polyoxymethylene in a homogeneous phase in a manner known per se, B) a relief unit (4) which optionally comprises a metering device (5) for additives to be added to the polymer, C) a granulator (6), D) an extraction device (7), and E) optionally a drying device (8). The inventive device and the polymerization method carried out therewith allow to achieve especially low residual monomer contents in a simple and power-saving manner.
C08G 2/00 - Polymères d'addition d'aldéhydes ou de leurs oligomères cycliques ou de cétonesLeurs copolymères d'addition avec moins de 50 moles % d'autres substances
C08G 2/18 - Copolymérisation d'aldéhydes ou de cétones
C08G 2/38 - Polymères séquencés ou greffés, préparés par polymérisation d'aldéhydes ou de cétones sur des composés macromoléculaires
The present invention relates to an odorant for town gas, comprising norbornene or a norbornene derivative with a diluent and optionally further additives. The odorant according to the invention is characterized in that it is sulfur-free and of low toxicity, but is absorbed by the earth only in a small amount and develops a distinct warning odor even in low concentrations.
brevets
