Abrégé

The invention relates to a method for degassing elastomer-containing media, such as elastomer solutions and dispersions in particular, and degassing devices (1) for carrying out said method.

Classes IPC  ?

• B29C 47/08 - Eléments constitutifs, détails ou accessoires; Opérations auxiliaires
• B29C 47/60 - Vis
• B29C 47/40 - utilisant au moins deux vis qui s'engrènent
• B29C 47/76 - Events ou moyens de dégazage
• B29B 7/48 - Mélange; Malaxage continu, avec dispositifs mécaniques de mélange ou de malaxage avec dispositifs de mélange ou de malaxage mobiles rotatifs avec plus d'un arbre à dispositifs à engrènement, p.ex. à vis qui s'engrènent
• B29B 7/74 - Mélange; Malaxage utilisant d'autres mélangeurs ou des combinaisons de mélangeurs différents
• B29B 7/84 - Ventilation ou dégazage

Abrégé

The present invention relates to specific water and solvent-free nitrile rubbers having specific functional groups and/or end groups, a process for the production thereof and the use thereof. This process involves removing volatile compounds from a fluid (F) containing (1) at least one nitrile rubber and (2) at least one volatile compound, wherein the process comprises at least the steps of a.) treating the fluid (F) in at least one conversation unit, b.) retreating the concentrated fluid from step a.) in at least one retreating unit and c.) feeding the retreated concentrated fluid from step b.) into at least one retreating unit.

Classes IPC  ?

• C08L 9/02 - Copolymères avec l'acrylonitrile
• C08C 2/00 - Traitement des solutions de caoutchouc
• C08C 1/12 - Concentration par évaporation
• C08C 2/02 - Purification

Abrégé

The present invention relates to curing of polymers, particularly to self curing of polymers. The present invention provides a process for curing of copolymers of isoolefins and olefinic monomers. The process includes the step of reacting the copolymer with an azidation reagent to form an azidated copolymer and then heating the azidated copolymer at a suitable temperature to cure the polymer.

Classes IPC  ?

• C08J 3/24 - Réticulation, p.ex. vulcanisation, de macromolécules
• C08K 3/28 - Composés contenant de l'azote
• C08K 5/5445 - Composés contenant du silicium contenant de l'azote contenant au moins une liaison Si—N
• C08L 23/26 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures aliphatiques non saturés ne possédant qu'une seule liaison double carbone-carbone; Compositions contenant des dérivés de tels polymères  modifiées par post-traitement chimique

Abrégé

The present invention relates to functionalized copolymers of isoolefins and olefinic monomers, particularly to azidated copolymers. The present invention also relates to methods of preparing such azidated copolymers. The functionalized copolymers are used in various technology areas such as surface modification, adhesion, drug delivery, compatibilization of polymer blends or motor oil and fuel additives, and in providing clean cured products without contaminant leaching and/or side products.

Classes IPC  ?

• C08F 8/30 - Introduction d'atomes d'azote ou de groupes contenant de l'azote
• C08F 210/12 - Isobutène avec des dioléfines conjuguées, p.ex. caoutchouc butyle
• C08F 212/12 - Hydrocarbures possédant un radical aliphatique non saturé ramifié a radical alkyle lié à un cycle
• C08F 236/08 - Isoprène
• C08F 236/10 - Copolymères de composés contenant plusieurs radicaux aliphatiques non saturés et l'un au moins contenant plusieurs liaisons doubles carbone-carbone le radical ne contenant que deux doubles liaisons carbone-carbone conjuguées avec des monomères vinylaromatiques

Abrégé

The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.

Classes IPC  ?

• C08F 8/22 - Halogénation par réaction avec des halogènes libres
• C08C 19/14 - Incorporation d'atomes d'halogène dans la molécule par réaction avec des halogènes

Abrégé

The present invention relates to a process for the production of halogenated butyl rubber and an apparatus for the production of rubber cement for use in the production of halogenated butyl rubber. The process and apparatus permit direct mixing of aqueous rubber slurry with a non-halogenated organic solvent to make a rubber cement solution. The water layer is then separated from the partially dissolved rubber cement and the cement phase is sent for halogenation. The apparatus is an enclosed vessel comprised of at least one dissolving zone and at least one separator zone. The process and apparatus advantageously employ recycle of rubber cement in order to disrupt an interface layer that forms between the water and rubber cement, to thereby improve continuously operation of the process.

Classes IPC  ?

• C08C 19/12 - Incorporation d'atomes d'halogène dans la molécule
• C08L 23/28 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures aliphatiques non saturés ne possédant qu'une seule liaison double carbone-carbone; Compositions contenant des dérivés de tels polymères  modifiées par post-traitement chimique par réaction avec les halogènes ou des composés contenant des halogènes

Abrégé

The present invention relates to a reactor (10) and a method for continuous polymerization, the reactor (10) having a substantially tubular reactor housing (16). The reactor housing (16) has a drive (38) which runs along the geometric central axis (12) in the flow direction (22) and is configured as a central shaft. A rotatably arranged scraper or wiper (36) is provided within the reactor housing (16), the scraper or wiper (36) having at least one scraper or wiper blade (42) to run along an inner side (44) of the reactor housing (16). The rotational movement of the scraper or wiper (36) results in radial mixing of a flow within the reactor housing (16), which flow dominates gravity effects and, as a result of shaping of the scrapers or wipers, optionally makes possible plug flow, a loop flow or backflow within the reactor (10) or also via an additional external pumped circulation system (23). This allows the reaction conditions in the axial direction of the reactor housing (16) to be predicted and suitable reaction conditions to be set and controlled individually along the reactor housing, such that a desired molecular weight distribution can be set in particular.

Classes IPC  ?

• B01J 19/18 - Réacteurs fixes avec éléments internes mobiles
• B01J 19/20 - Réacteurs fixes avec éléments internes mobiles en forme d'hélice, p.ex. réacteurs à vis
• C08F 2/01 - Procédés de polymérisation caractérisés par des éléments particuliers des appareils de polymérisation utilisés

Abrégé

The present invention relates to water and solvent -free halogenated butyl rubber products as a process for the production thereof. The process comprises at least the steps of: a.) treating a fluid containing at least one halogenated butyl rubber and at least one volatile compound in at least one concentrator unit, b.) reheating the concentrated fluid and c.) feeding the reheated concentrated fluid into at least one extruder.

Classes IPC  ?

• C08F 6/00 - Traitements postérieurs à la polymérisation
• C08L 23/28 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures aliphatiques non saturés ne possédant qu'une seule liaison double carbone-carbone; Compositions contenant des dérivés de tels polymères  modifiées par post-traitement chimique par réaction avec les halogènes ou des composés contenant des halogènes

Abrégé

The present invention relates to specific water and solvent- free nitrile rubbers having specific functional groups and/or end groups, a process for the production thereof and the use thereof. This process involves removing volatile compounds from a fluid (F) containing (1) at least one nitrile rubber and (2) at least one volatile compound, wherein the process comprises at least the steps of a.) treating the fluid (F) in at least one conversation unit, b.) retreating the concentrated fluid from step a.) in at least one retreating unit and c.) feeding the retreated concentrated fluid from step b.) into at least one retreating unit.

Classes IPC  ?

• C08C 1/12 - Concentration par évaporation
• C08C 2/00 - Traitement des solutions de caoutchouc
• C08F 6/10 - Elimination des matières volatiles, p.ex. monomères, solvants

Abrégé

The present invention relates to a process for the production of water and solvent -free hydrogenated nitrile rubber polymers, to the hydrogenated nitrile rubbers and the use thereof. The hydrogenated nitrile rubbers comprise repeating units derived from at least one conjugated diene, at least one alpha, beta - unsaturated nitrile and optionally one or more copolymerizable monomers and having a viscosity of at maximum 20000 Pa*s (measured at 100 degrees Celsius and at a shear rate of 1/s), preferably at maximum 10000 Pa*s, more preferably at maximum 5000 Pa*s and most preferably at maximum 1000 Pa*s.

Classes IPC  ?

• C08C 1/12 - Concentration par évaporation
• C08C 2/00 - Traitement des solutions de caoutchouc
• C08F 6/10 - Elimination des matières volatiles, p.ex. monomères, solvants
• C08F 8/04 - Réduction, p.ex. hydrogénation
• C08F 236/12 - Copolymères de composés contenant plusieurs radicaux aliphatiques non saturés et l'un au moins contenant plusieurs liaisons doubles carbone-carbone le radical ne contenant que deux doubles liaisons carbone-carbone conjuguées avec des nitriles

Abrégé

The invention relates to an energy efficient, environmentally favourable process for preparing water and solvent-free rubber ionomers and/or polymer nanocomposites comprising said rubber ionomers.

Classes IPC  ?

• C08C 19/12 - Incorporation d'atomes d'halogène dans la molécule
• C08F 6/10 - Elimination des matières volatiles, p.ex. monomères, solvants
• C08F 8/20 - Halogénation
• C08L 15/02 - Dérivés du caoutchouc contenant des halogènes
• C08L 23/28 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures aliphatiques non saturés ne possédant qu'une seule liaison double carbone-carbone; Compositions contenant des dérivés de tels polymères  modifiées par post-traitement chimique par réaction avec les halogènes ou des composés contenant des halogènes

Abrégé

The present invention relates to water and solvent-free polymers, in particular water and solvent- free synthetic rubber products like non-halogenated and halogenated butyl rubber products as well as a process for the production thereof. The invention further relates to a device suitable to accomplish said process.

Classes IPC  ?

• B29C 47/50 - utilisant au moins deux vis successives, p.ex. plastificateurs à étages multiples
• B29C 47/56 - utilisant plus d'une extrudeuse pour alimenter une matrice unique
• C08C 2/00 - Traitement des solutions de caoutchouc
• C08F 6/00 - Traitements postérieurs à la polymérisation
• C08L 23/28 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures aliphatiques non saturés ne possédant qu'une seule liaison double carbone-carbone; Compositions contenant des dérivés de tels polymères  modifiées par post-traitement chimique par réaction avec les halogènes ou des composés contenant des halogènes

Abrégé

The invention relates to an energy efficient, environmentally favourable process for the preparation of butyl ionomers that uses a common medium for both solution polymerization and subsequent bromination of butyl rubber. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and bromination of butyl rubber in the presence of a brominating agent and optionally for subsequent reaction with at least one nitrogen and/or phosphorus based nucleophile.

Classes IPC  ?

• C08F 8/32 - Introduction d'atomes d'azote ou de groupes contenant de l'azote par réaction avec des amines
• C08C 19/32 - Addition d'un réactif qui réagit avec un hétéro-atome ou un groupe contenant des hétéro-atomes de la macromolécule réagissant avec des halogènes ou des groupes contenant des halogènes
• C08F 210/12 - Isobutène avec des dioléfines conjuguées, p.ex. caoutchouc butyle
• C08F 8/40 - Introduction d'atomes de phosphore ou de groupes contenant du phosphore
• C08C 19/22 - Incorporation d'atomes d'azote dans la molécule
• C08C 19/24 - Incorporation d'atomes de phosphore dans la molécule
• C08F 2/06 - Solvant organique
• C08F 8/22 - Halogénation par réaction avec des halogènes libres
• C08F 8/44 - Préparation de sels métalliques ou de sels d'ammonium

Abrégé

The invention relates to a processes for preparing nanocomposites comprising rubber ionomers which were prepared by an energy efficient, environmentally favourable process that uses a common medium for solution polymerization, bromination of rubber and optionally subsequent polymer nanocomposite formation. Polymer nanocomposites according to the present invention exhibit high oxygen impermeability.

Classes IPC  ?

• C08F 8/22 - Halogénation par réaction avec des halogènes libres
• C08F 210/12 - Isobutène avec des dioléfines conjuguées, p.ex. caoutchouc butyle
• C08J 5/00 - Fabrication d'objets ou de matériaux façonnés contenant des substances macromoléculaires
• B60C 1/00 - Pneumatiques caractérisés par la composition chimique, la disposition ou le mélange physique de la composition
• C08L 23/22 - Copolymères de l'isobutylène; Caoutchouc butyl

Abrégé

The invention relates to an energy efficient, environmentally favourable process for the preparation of halogenated rubbers, in particular chloro- and bromobutyl rubber, that uses a common aliphatic medium of specific composition for both solution polymerization and subsequent halogenation of the rubber. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and halogenation of rubber with intermediate removal of un-reacted monomers.

Classes IPC  ?

• B60C 1/00 - Pneumatiques caractérisés par la composition chimique, la disposition ou le mélange physique de la composition
• C08F 8/22 - Halogénation par réaction avec des halogènes libres
• C08F 210/12 - Isobutène avec des dioléfines conjuguées, p.ex. caoutchouc butyle

Abrégé

The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated rubbers, in particular bromobutyl rubber, that uses a common medium for both solution polymerization and subsequent bromination of the rubber and which further exhibits an enhanced bromine usage due to the use of a oxidizing agent. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and bromination of rubber in the presence of a brominating agent and an oxidizing agent with intermediate removal of un-reacted monomers.

Classes IPC  ?

• C08F 2/06 - Solvant organique
• C08F 8/22 - Halogénation par réaction avec des halogènes libres
• C08F 210/12 - Isobutène avec des dioléfines conjuguées, p.ex. caoutchouc butyle
• C08C 19/14 - Incorporation d'atomes d'halogène dans la molécule par réaction avec des halogènes
• C08F 6/10 - Elimination des matières volatiles, p.ex. monomères, solvants

Abrégé

The present invention relates to a reactor (10) and a process for continuous polymerization, wherein the reactor (10) has an essentially tubular reactor housing (16). The reactor housing (16) has a drive (38) which is configured as a central shaft and runs along the geometric central axis (12) in the flow direction (22). Within the reactor housing (16), a rotatable scraper or wiper (36) is provided, the scraper (36) having at least one scraper blade (42) for running along an inner face (44) of the reactor housing (16). Preferably, scrapers/wipers which are fastened to the housing wall and scrape/wipe the optionally temperature-controlled drive shaft aid the mixing action. The rotary motion of the scraper (36) achieves a radial mixing of a stream within the reactor housing (16) that suppresses gravity effects and the shape of the scrapers/wipers facilitates either a plug flow or a backflow within the reactor (10). This allows the reaction conditions in the axial direction of the reactor housing (10) to be predicted and individually suitable reaction conditions to be set and monitored along the reactor housing, so that, in particular, a desired molecular weight distribution can be set.

Classes IPC  ?

• B01J 19/20 - Réacteurs fixes avec éléments internes mobiles en forme d'hélice, p.ex. réacteurs à vis

Abrégé

The present invention relates to a reactor (10) and a method for continuous polymerization, wherein the reactor (10) comprises a substantially tube-shaped reactor housing (16). The reactor housing (16) comprises a drive (38) running along the geometric centerline (12) in the flow direction (22), the drive being implemented as a center shaft. A rotationally disposed scraper or wiper (36) is provided within the reactor housing (16), wherein the scraper or wiper (36) comprises at least one scraper or wiper blade (42) for running along an inner side (44) of the reactor housing (16). Radial mixing of a flow within the reactor housing (16) is achieved by the rotational motion of the scraper or wiper (36), dominating the effects of gravity and selectively allowing a piston, loop, or return flow within the reactor (10) by shaping the scraper or wiper. Said selection allows the reaction conditions in the axial direction of the reactor housing (16) to be predicted and individually suitable reaction conditions to be adjusted and controlled along the reactor housing, so that in particular a desired molecular weight distribution can be set.

Classes IPC  ?

• B01J 19/20 - Réacteurs fixes avec éléments internes mobiles en forme d'hélice, p.ex. réacteurs à vis

Abrégé

The present invention relates to water and solvent-free polymers, in particular water and solvent- free synthetic rubber products like non-halogenated and halogenated butyl rubber products as well as a process for the production thereof. The invention further relates to a device suitable to accomplish said process.

Classes IPC  ?

• C08C 2/00 - Traitement des solutions de caoutchouc
• C08L 9/00 - Compositions contenant des homopolymères ou des copolymères d'hydrocarbures à diènes conjugués
• C08L 23/22 - Copolymères de l'isobutylène; Caoutchouc butyl

Abrégé

An integrated process for the solution polymerization and subsequent halogenation of butyl rubber in a common medium is disclosed. The process comprises providing a solution polymerization reactor containing a C6 medium mixed with a monomer mixture comprising at least an isoolefin monomer and a multiolefin monomer in a mass ratio of monomer mixture to medium of from 61:39 to 80:20. Once polymerized, residual unreacted monomer mixture is separated from the rubber solution using a distillation process. The residual monomers may then be purified and recycled back into the reactor. The separated rubber solution is then halogenated. The process obviates the need for separating the rubber from the medium following polymerization, then re-dissolving it in another solvent for halogenation, thereby saving energy cost. The process optionally employs heat exchangers for the reactor feed streams to further reduce energy consumption.

Classes IPC  ?

• C08F 8/20 - Halogénation
• C08F 8/22 - Halogénation par réaction avec des halogènes libres