Vulcanisable compositions based on epoxy group-containing nitrile rubbers

There are provided novel vulcanizable compositions based on optionally fully or partly hydrogenated nitrile rubbers containing epoxy groups, specific basic crosslinkers and crosslinking accelerators, as a result of which the use of conventional crosslinkers, such as sulphur in particular, is no longer required. The vulcanizates producible therefrom possess very good compression sets at room temperature, 100° C. and 150° C., and additionally exhibit high tensile stress combined with good elongation at break.

Pulverulent mixtures containing low-emission nitrile rubbers

Pulverulent mixtures containing at least one nitrite rubber and at least one release agent, which are characterized by a particular average particle diameter, are provided. These mixtures have particularly low emissions and are outstandingly suitable for producing materials and components for indoor applications.

Nitrile rubbers having low emission values

An improved polymerization process using a specific molecular weight regulator makes it possible to produce new nitrile rubbers featuring particularly low emission values and giving vulcanizates which have an advantageous profile of properties and which are of outstanding quality, in particular in odor-sensitive applications.

Vulcanizable compositions based on nitrile rubbers containing epoxy groups

There are provided novel vulcanizable compositions based on optionally fully or partly hydrogenated nitrile rubbers containing epoxy groups, and specific crosslinkers, which no longer require use of conventional crosslinkers, more particularly sulphur. The vulcanizates producible therefrom possess very good compression sets at room temperature, 100° C. and 150° C., and additionally exhibit high tensile strength combined with good elongation at break.

COMPOSITIONS THAT CAN BE VULCANIZED AND THAT ARE BASED ON ETHYLENE/VINYL ACETATE COPOLYMERS CONTAINING EPOXY GROUPS

The invention relates to vulcanizable compositions comprising 1. Vulcanizable composition comprising(a) at least one ethylene-vinyl acetate copolymer containing epoxy groups and having a vinyl acetate content of at least 20% by weight, preferably at least 30% by weight, more preferably at least 40% by weight, based on the ethylene-vinyl acetate copolymer containing epoxy groups, and(b) at least one carboxylated nitrile rubber.3. Vulcanizable composition according to claim 2 , characterized in that the ethylene-vinyl acetate copolymer (a) containing epoxy groups has repeat units of a monomer which contains epoxy groups and is selected from the group of 2-ethylglycidyl acrylate claim 2 , 2-ethylglycidyl methacrylate claim 2 , 2-(n-propyl)glycidyl acrylate claim 2 , 2-(n-propyl)glycidyl methacrylate claim 2 , 2-(n-butyl)glycidyl acrylate claim 2 , 2-(n-butyl)glycidyl methacrylate claim 2 , glycidylmethyl acrylate claim 2 , glycidyl methacrylate claim 2 , glycidylmethyl methacrylate claim 2 , glycidyl acrylate claim 2 , (3′ claim 2 ,4′-epoxyheptyl)-2-ethyl acrylate claim 2 , (3′ claim 2 ,4′-epoxyheptyl)-2-ethyl methacrylate claim 2 , 6′ claim 2 ,7′-epoxyheptyl acrylate claim 2 , 6′ claim 2 ,7′-epoxyheptyl methacrylate claim 2 , allyl glycidyl ether claim 2 , allyl 3 claim 2 ,4-epoxyheptyl ether claim 2 , 6 claim 2 ,7-epoxyheptyl allyl ether claim 2 , vinyl glycidyl ether claim 2 , vinyl 3 claim 2 ,4-epoxyheptyl ether claim 2 , 3 claim 2 ,4-epoxyheptyl vinyl ether claim 2 , 6 claim 2 ,7-epoxyheptyl vinyl ether claim 2 , o-vinylbenzyl glycidyl ether claim 2 , m-vinylbenzyl glycidyl ether claim 2 , p-vinylbenzyl glycidyl ether and 3-vinylcyclohexene oxide.4. Vulcanizable composition according to claim 3 , characterized in that the proportion of epoxy monomers is less than 20% by weight claim 3 , preferably less than 15% by weight claim 3 , more preferably less than 10% by weight claim 3 , based on the ethylene-vinyl acetate copolymer.5. Vulcanizable composition according ...

VULCANIZABLE POLYMER COMPOSITIONS

A novel vulcanizable polymer composition is provided which is characterized by a specific combination of a polyamine crosslinking agent and a particular crosslinking accelerator. Furtheron polymer vulcanizates on the basis of such polymer compositions as well as method for preparing such polymer vulcanizate is provided, in particular in the form of mouldings or shaped parts.

PROCESS FOR PRODUCING NITRILE RUBBERS IN ORGANIC SOLVENTS

A novel and improved process is provided for producing nitrile rubbers through free-radical polymerization in specific solvent mixtures. The resultant nitrile rubbers can then be subjected to hydrogenation. The process features excellent time-conversion curves. 1. Process for producing nitrile rubbers through free-radical polymerization of at least one conjugated diene , of at least one α ,β-unsaturated nitrile and optionally of one or more other copolymerizable monomers , characterized in that at least two solvents are used , where the amount used of one solvent , known as the main solvent , is in the range from 70 to 99.9% by volume , based on the entirety of all of the solvents used.4. Process according to claim 3 , where regulator used comprises dodecylpropanoic acid trithiocarbonate (DoPAT) claim 3 , dibenzoyl trithiocarbonate (DiBenT) claim 3 , cumyl phenyl dithioacetate (CPDA) claim 3 , cumyl dithiobenzoate claim 3 , phenyl ethyl dithiobenzoate claim 3 , cyanoisopropyl dithiobenzoate (CPDB) claim 3 , 2-cyanopropyl dodecyl trithiocarbonate claim 3 , 2-cyanoethyl dithiobenzoate claim 3 , 2-cyanoprop-2-yl dithiophenylacetate claim 3 , 2-cyanoprop-2-yl dithiobenzoate claim 3 , S-thiobenzoyl-1H claim 3 ,1H claim 3 , 2-keto-3-oxa-4H claim 3 ,4H claim 3 ,5H claim 3 ,5H-perfluoroundecanethiol or S-thiobenzoyl-1-phenyl-2-keto-3-oxa-4H claim 3 ,4H claim 3 ,5H claim 3 ,5H-perfluoroundecanethiol.5. Process according to claim 2 , where the molar-mass regulator has been selected from the group consisting of{'sub': 1', '16, '(i) alkyl mercaptans, preferably C-Calkyl mercaptans, in particular methyl mercaptan, ethyl mercaptan, n-butyl mercaptan, n-hexyl mercaptan, n-octyl mercaptan, n-dodecylmercaptan, tert-nonyl mercaptan and tert-dodecyl mercaptans,'}(ii) aliphatic mercapto alcohols and cycloaliphatic mercapto alcohols, preferably 2-mercapto-1-ethanol, 3-mercapto-1-propanol, 3-mercaptopropane-1,2-diol, 4-mercapto-1-butanol and 2-mercaptocyclohexanol,(iii) mercaptoacetic ...

NITRILE RUBBERS

Through the use of an improved iron-based redox system it is possible to prepare special new, optionally hydrogenated, nitrile rubbers which feature a more uniform monomer distribution and a lower fraction of long-chain branches and hence are distinguished by enhanced flow properties at the same time as very good properties on processing.

Protein antigens useful for cancer therapy and vaccination

PstS1 protein or fragments thereof are highly immunogenic protein antigens for vaccination and immunotherapy of cancer in humans and animals. A wild-type or a recombinant mycobacterial PstS1 protein are used for the preparation of a vaccine or therapeutical composition for the treatment of cancer, in particular for the treatment of urothelial carcinoma of the bladder or mamma carcinoma.

COMPOSITIONS THAT CAN BE VULCANIZED AND THAT ARE BASED ON NITRILE RUBBERS CONTAINING EPOXY GROUPS

There are provided novel vulcanizable compositions based on optionally fully or partly hydrogenated nitrile rubbers containing epoxy groups, and specific crosslinkers, which no longer require use of conventional crosslinkers, more particularly sulphur. The vulcanizates producible therefrom possess very good compression sets at room temperature, 100° C. and 150° C., and additionally exhibit high tensile stress combined with good elongation at break. 1. Vulcanizable composition comprising(i) at least one optionally fully or partly hydrogenated nitrile rubber containing epoxy groups and comprising repeat units derived from at least one conjugated diene, at least one α,β-unsaturated nitrile and optionally one or more further copolymerizable monomers, but not from a nonconjugated cyclic polyene, and(ii) at least one Lewis and/or Brønsted base as a crosslinker,said vulcanizable composition comprising crosslinkers other than those specified under (ii) only in an amount of less than 2.5 parts by weight, based on 100 parts by weight of the optionally fully or partly hydrogenated nitrile rubber (i) containing epoxy groups.2. Vulcanizable composition according to claim 1 , characterized in that crosslinkers other than those specified under (ii) are present up to a maximum amount of 2.3 parts by weight claim 1 , preferably up to a maximum amount of 2.25 parts by weight claim 1 , more preferably up to a maximum amount of 2 parts by weight claim 1 , even more preferably up to a maximum amount of 1.5 parts by weight claim 1 , especially up to a maximum amount of 1 part by weight claim 1 , especially preferably up to a maximum amount of 0.5 part by weight claim 1 , very especially preferably up to a maximum amount of 0.4 part by weight claim 1 , based on 100 parts by weight of the optionally fully or partly hydrogenated nitrile rubber (i) containing epoxy groups claim 1 , and the vulcanizable composition most especially preferably does not have any crosslinkers at all apart from ...

Compositions that can be vulcanized and that are based on nitrile rubbers containing epoxy groups

There are provided novel vulcanizable compositions based on optionally fully or partly hydrogenated nitrile rubbers containing epoxy groups, and specific crosslinkers, which no longer require use of conventional crosslinkers, more particularly sulphur. The vulcanizates producible therefrom possess very good compression sets at room temperature, 100° C. and 150° C., and additionally exhibit high tensile stress combined with good elongation at break.

Nitrile rubbers having low emission values

An improved polymerization process using a specific molecular weight regulator makes it possible to produce new nitrile rubbers featuring particularly low emission values and giving vulcanizates which have an advantageous profile of properties and which are of outstanding quality, in particular in odor-sensitive applications.

Stabilized rubbers

Novel rubbers are provided which are stabilized by a specific combination of at least three different anti ageing compounds. Said rubbers dispose of an increase storage stability as well as an improved colour stability over the short term as well as over the long term. The invention also relates a process for producing said novel rubbers, vulcanizable mixtures based thereon, a process for producing vulcanizates from those mixtures and the vulcanizates obtained.

METHOD FOR PRODUCING PURIFIED NITRILE RUBBERS

A new process is provided for producing a purified nitrile rubber by subjecting the nitrile rubber, which contains specific impurities, to a defined ultrafiltration. Success is thereby achieved in substantially reducing the amount of the specific impurities in the nitrile rubber. 1. Process for producing a purified nitrile rubber , characterized in that a nitrile rubber which has repeat units of at least one conjugated diene monomer and of at least one α ,β-unsaturated nitrile monomer and also comprises Diels-Alder by-products of these monomers is subjected to an ultrafiltration , by the nitrile rubber , in solution in at least one organic solvent , being passed one or more times over an ultrafiltration membrane , to give a retentate stream which comprises the purified nitrile rubber and does not flow through the ultrafiltration membrane , and a permeate stream which comprises Diels-Alder by-products and which flows through the ultrafiltration membrane , with the provisos that(i) the ultrafiltration membrane has one or more porous layers and the layer with the smallest pores possesses a pore diameter in the 1-200 nm range,(ii) the ultrafiltration is carried out at a temperature in the range from 10 to 150° C. with application of a pressure in the range from 1 to 80 bar, and(iii) the flow rate of the retentate stream during the ultrafiltration is set to a level of greater than 0.2 m/sec, andthe amount of Diels-Alder by-products in the purified nitrile rubber is reduced by at least 50% by weight as a result of the ultrafiltration, relative to the amount in the nitrile rubber originally used.2. Process according to claim 1 , characterized in that the amount of Diels-Alder by-products in the purified nitrile rubber is reduced by at least 80% by weight claim 1 , preferably by at least 90% by weight and up to 99.9% by weight claim 1 , based on the amount in the nitrile rubber originally used.3. Process according to claim 1 , characterized in that the nitrile rubber ...

VULCANIZABLE POLYMER COMPOSITIONS

A novel vulcanizable polymer composition is provided which is characterized by a specific combination of a polyamine crosslinking agent, a particular crosslinking accelerator and an alkali metal salt. Further on polymer vulcanizates on the basis of such polymer compositions as well as a method for preparing such polymer vulcanizates is provided, in particular in the form of mouldings or shaped parts.

CROSS-LINKING AGENTS CONTAINING ISOCYANATE GROUPS FOR NITRILE RUBBERS

By the use of special cross-linkers that contain at least two isocyanate groups, hydroxyl group-containing optionally hydrogenated nitrile rubber polymers can be successfully cross-linked. Preferred cross-linkers contain allophanate, biuret, uretdione, uretonimine, bridged carbamate, carbodiimide, isocyanurate, iminooxadiazinedione or oxadiazinetrione structural elements. 2. Use according to claim 1 , characterized in that the compounds of the general formula (I) contain at least one allophanate claim 1 , biuret claim 1 , uretdione claim 1 , uretonimine claim 1 , bridged carbamate claim 1 , carbodiimide claim 1 , isocyanurate claim 1 , iminooxadiazinedione or oxadiazinetrione structure.4. Use according to one of to claim 1 , characterized in that the compound of the general formula (I) is a dimer or trimer of diisocyanates.5. Use according to one of to claim 1 , characterized in that the cross-linker is employed in the absence of tin-containing compounds.6. Use according to one of to claim 1 , characterized in that either no solvents at all or not more than 15% by weight of solvents claim 1 , preferably not more than 10% by weight claim 1 , particularly preferably not more than 5% by weight claim 1 , very particularly preferably not more than 2% by weight and especially preferably not more than 1% by weight of solvents are present in this claim 1 , in each case based on the hydroxyl group-containing (H)NBR rubber employed.7. Vulcanizable composition claim 1 , containing at least one hydroxyl group-containing (H)NBR rubber and at least one cross-linker claim 1 , as is defined in one of to .8. Vulcanizable composition according to claim 7 , characterized in that the (H)NBR rubber contains repeating units claim 7 , derived from at least one conjugated diene claim 7 , at least one α claim 7 ,β-unsaturated nitrile claim 7 , at least one copolymerizable hydroxyl group-containing monomer and optionally one or more other copolymerizable monomers and the C═C double bonds in ...

Color-stable nitrile rubbers

What are provided are colour-stable, low-salt nitrile rubbers and a process for production thereof under specific conditions for the coagulation and/or washing of the nitrile rubber. Additionally obtainable are the corresponding vulcanizable mixtures based on this nitrile rubber, a process for producing vulcanizates from these mixtures and the resultant vulcanizates having excellent processing properties.

Cross-linking agents containing isocyanate groups for nitrile rubbers

By the use of special cross-linkers that contain at least two isocyanate groups, hydroxyl group-containing optionally hydrogenated nitrile rubber polymers can be successfully cross-linked. Preferred cross-linkers contain allophanate, biuret, uretdione, uretonimine, bridged carbamate, carbodiimide, isocyanurate, iminooxadiazinedione or oxadiazinetrione structural elements.

Nitrile rubbers and production thereof in organic solvents

A new process is provided for preparing nitrile rubbers by free-radical polymerization in an organic solvent and in the presence of specific modifier substances. This polymerization may be followed by hydrogenation to give likewise new hydrogenated nitrile rubbers, the hydrogenation advantageously taking place likewise in organic solvent. The optionally hydrogenated nitrile rubbers obtained are notable for having fragments of the employed modifier substances in the main polymer chain and/or as end groups. They can be prepared with a wide diversity of molecular weights and polydispersity indices, especially with very low polydispersity indices.

Process for the production of water and solvent-free nitrile rubbers

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.

Nitrile rubbers

Through the use of an improved iron-based redox system it is possible to prepare special new, optionally hydrogenated, nitrile rubbers which feature a more uniform monomer distribution and a lower fraction of long-chain branches and hence are distinguished by enhanced flow properties at the same time as very good properties on processing.

VULCANIZABLE COMPOSITIONS BASED ON NITRILE RUBBERS CONTAINING EPOXY GROUPS

There are provided novel vulcanizable compositions based on optionally fully or partly hydrogenated nitrile rubbers containing epoxy groups, and specific crosslinkers, which no longer require use of conventional crosslinkers, more particularly sulphur. The vulcanizates producible therefrom possess very good compression sets at room temperature, 100° C. and 150° C., and additionally exhibit high tensile strength combined with good elongation at break. 1. Vulcanizable composition comprising(i) at least one optionally fully or partly hydrogenated nitrile rubber containing epoxy groups and comprising repeat units derived from at least one conjugated diene, at least one α,β-unsaturated nitrile and optionally one or more further copolymerizable monomers, but not from a nonconjugated cyclic polyene, and(ii) at least one Lewis and/or Brønsted acid as a crosslinker,said vulcanizable composition comprising crosslinkers other than those specified under (ii) only in an amount of less than 2.5 parts by weight, based on 100 parts by weight of the optionally fully or partly hydrogenated nitrile rubber (i) containing epoxy groups.2. Vulcanizable composition according to claim 1 , characterized in that crosslinkers other than those specified under (ii) are present up to a maximum amount of 2.3 parts by weight claim 1 , preferably up to a maximum amount of 2.25 parts by weight claim 1 , more preferably up to a maximum amount of 2 parts by weight claim 1 , even more preferably up to a maximum amount of 1.5 parts by weight claim 1 , especially up to a maximum amount of 1 part by weight claim 1 , especially preferably up to a maximum amount of 0.5 part by weight claim 1 , very especially preferably up to a maximum amount of 0.4 part by weight claim 1 , based on 100 parts by weight of the optionally fully or partly hydrogenated nitrile rubber (i) containing epoxy groups claim 1 , and the vulcanizable composition most especially preferably does not have any crosslinkers at all apart from ...

Process for the production of water and solvent-free nitrile rubbers

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.

VULCANISABLE COMPOSITIONS BASED ON EPOXY GROUP-CONTAINING NITRILE RUBBERS

There are provided novel vulcanizable compositions based on optionally fully or partly hydrogenated nitrile rubbers containing epoxy groups, specific basic crosslinkers and crosslinking accelerators, as a result of which the use of conventional crosslinkers, such as sulphur in particular, is no longer required. The vulcanizates producible therefrom possess very good compression sets at room temperature, 100° C. and 150° C., and additionally exhibit high tensile stress combined with good elongation at break. 2. Vulcanizable composition according to claim 1 , characterized in that it contains claim 1 , based in each case on 100 parts by weight of the optionally fully or partly hydrogenated nitrile rubber (i) containing epoxy groups claim 1 ,crosslinkers other than those mentioned in (ii) up to a maximum amount of 2.3 parts by weight and, at the same time, crosslinking accelerators other than those mentioned in (iii) up to a maximum amount of 2,3 parts by weight,preferably crosslinkers other than those mentioned in (ii) up to a maximum amount of 2.25 parts by weight and, at the same time, crosslinking accelerators other than those mentioned in (iii) up to a maximum amount of 2.25 parts by weight,more preferably crosslinkers other than those mentioned in (ii) up to a maximum amount of 2 parts by weight and, at the same time, crosslinking accelerators other than those mentioned in (iii) up to a maximum amount of 2 parts by weight,even more preferably crosslinkers other than those mentioned in (ii) up to a maximum amount of 1.5 parts by weight and, at the same time, crosslinking accelerators other than those mentioned in (iii) up to a maximum amount of 1.5 parts by weight,especially crosslinkers other than those mentioned in (ii) up to a maximum amount of 1 part by weight and, at the same time, crosslinking accelerators other than those mentioned in (iii) up to a maximum amount of 1 part by weight,especially preferably crosslinkers other than those mentioned in (ii) up to ...

Nitrile-diene-carboxylic acid ester copolymers

The present invention relates to nitrile-diene-carboxylic ester copolymers, to the preparation thereof, to vulcanizable compositions containing nitrile-diene-carboxylic ester copolymers and the production thereof, and to vulcanizates based on nitrile-diene-carboxylic ester copolymers and to the use thereof in elastomeric components.

NITRILE RUBBERS AND PRODUCTION THEREOF IN ORGANIC SOLVENTS

A new process is provided for preparing nitrile rubbers by free-radical polymerization in an organic solvent and in the presence of specific modifier substances. This polymerization may be followed by hydrogenation to give likewise new hydrogenated nitrile rubbers, the hydrogenation advantageously taking place likewise in organic solvent. The optionally hydrogenated nitrile rubbers obtained are notable for having fragments of the employed modifier substances in the main polymer chain and/or as end groups. They can he prepared with a wide diversity of molecular weights and polydispersity indices, especially with very low polydispersity indices. 2. Nitrile rubber according to claim 1 , in which the moieties Z and R are each singly or multiply substituted claim 1 , preferably by one or more substituents which are able to adopt all of the definitions applying to Z claim 1 , more preferably by one or more substituents selected from the group consisting of fluoro claim 1 , chloro claim 1 , bromo or iodo claim 1 , alkyl claim 1 , carbocyclyl claim 1 , heterocyclyl claim 1 , aryl claim 1 , heteroaryl claim 1 , arylalkyl claim 1 , heteroarylalkyl claim 1 , alkoxy claim 1 , aryloxy claim 1 , alkylthio claim 1 , arylthio claim 1 , amino claim 1 , amido claim 1 , carbamoyl claim 1 , carbonyl claim 1 , carboxyl claim 1 , oxycarbonyl claim 1 , oxysulphonyl and epoxy.4. Nitrite rubber according to claim 3 , where R claim 3 , with the proviso that R following homolytic fission to the adjacent atom in the nitrite rubber forms alternatively a secondary claim 3 , tertiary or aromatically stabilized radical claim 3 , is alternatively{'sub': 3', '20, 'a linear or branched, saturated or mono- or polyunsaturated, optionally singly or multiply substituted alkyl moiety, preferably a corresponding C-C-alkyl moiety, more particularly sec-butyl, tert-butyl, isopropyl, 1-buten-3-yl, 2-chloro-1-buten-2-yl, propionic acid-2-yl, propionitrile-2-yl, 2-methylpropanenitrile-2-yl, 2-methylpropionic ...

Compositions that can be vulcanized and that are based on ethylene/vinyl acetate copolymers containing epoxy groups

The invention relates to vulcanizable compositions comprising (a) at least one ethylene-vinyl acetate copolymer containing epoxy groups and having a vinyl acetate content of at least 20% by weight, preferably at least 30% by weight, more preferably at least 40% by weight, based on the ethylene-vinyl acetate copolymer containing epoxy groups, and (b) at least one carboxylated nitrile rubber.

PULVERULENT MIXTURE OF PRECROSSLINKED NITRILE RUBBERS

What are provided are pulverulent mixtures based on specific nitrile rubbers and at least one separating agent, and also a process for producing vulcanizable mixtures and vulcanizates made from these pulverulent mixtures, and the resultant vulcanizates and their use, especially in tyre treads, where an improvement in wet skid resistance, dry grip and rolling resistance delivers is observed with simultaneously good mixing characteristics. 1. Pulverulent mixture comprising of at least one α,β-unsaturated nitrile monomer selected from the group consisting of acrylonitrile, methacrylonitrile, ethacrylonitrile and mixtures thereof,', 'of at least one conjugated diene monomer selected from the group consisting of 1,2-butadiene, 1,3-butadiene, isoprene, 2,3-dimethylbutadiene, piperylene and mixtures thereof, and', 'of at least one free-radically polymerizable compound having at least three olefinic double bonds per molecule wherein the free-radically polymerizable compound containing at least three olefinic double bonds per molecule is trimethylolpropane tri(meth)acrylate, wherein the proportion of the free-radically polymerizable compounds having at least three olefinic double bonds per molecule is in the range from 0.5% to 5% by weight, based on the overall polymer,, '(1) at least one nitrile rubber containing repeat units'}and(2) at least one separating agent selected from the group consisting of silicas, calcium carbonate, magnesium carbonate, silicates, fatty acid salts, calcium phosphate, aluminium oxide, barium sulfate, zinc oxide, titanium dioxide, polymers having a high glass transition temperature, carbon nanotubes, and mixtures of the aforementioned separating agents; and whereinthe pulverulent mixture has an average particle diameter Da in the range from 0.06 mm to 0.75 mm.2. Pulverulent mixture according to claim 1 , wherein the nitrile rubber (1) has been precrosslinked.3. Pulverulent mixture according to claim 1 , wherein the pulverulent mixture has an ...

NITRILE-DIENE-CARBOXYLIC ACID ESTER COPOLYMERS

The present invention relates to nitrile-diene-carboxylic ester copolymers, to the preparation thereof, to vulcanizable compositions containing nitrile-diene-carboxylic ester copolymers and the production thereof, and to vulcanizates based on nitrile-diene-carboxylic ester copolymers and to the use thereof in elastomeric components. 1. Unhydrogenated nitrile-diene-carboxylic ester copolymers comprising:(a) 15% to 40% by weight of at least one α,β-ethylenically unsaturated nitrile unit,(b) 30% to 65% by weight of at least one conjugated diene unit and(c) 20% to 30% by weight of at least one PEG acrylate unit (c), the PEG acrylate unit (c) is butoxy polyethylene glycol (meth)acrylate having 2 repeat ethylene glycol units.2. (canceled)3. (canceled)4. Unhydrogenated nitrile-diene-carboxylic ester copolymers according to claim 1 , wherein the α claim 1 ,β-ethylenically unsaturated nitrile units (a) are derived from acrylonitrile claim 1 , methacrylonitrile claim 1 , ethacrylonitrile claim 1 , or mixtures thereof.5. Unhydrogenated nitrile-diene-carboxylic ester copolymers according to claim 1 , wherein the conjugated diene units (b) are derived from 1 claim 1 ,3-butadiene claim 1 , isoprene claim 1 , 2 claim 1 ,3-dimethylbutadiene claim 1 , 1 claim 1 ,3-pentadiene (piperylene) claim 1 , or mixtures thereof.6. Unhydrogenated nitrile-diene-carboxylic ester copolymers according to claim 1 , wherein copolymers are those containing 15% to 40% by weight of acrylonitrile units claim 1 , 30% to 65% by weight of 1 claim 1 ,3-butadiene units and 20% to 30% by weight of butoxy diethylene glycol (meth)acrylate units.7. (canceled)8. (canceled)9. (canceled)10. Vulcanizable composition comprising unhydrogenated nitrile-diene-carboxylic ester copolymers according to and at least one crosslinker.11. Process for producing a vulcanizable composition comprising mixing a unhydrogenated nitrile-diene-carboxylic ester copolymer according to with at least one crosslinker.12. Process for ...

PULVERULENT MIXTURES CONTAINING LOW-EMISSION NITRILE RUBBERS

Pulverulent mixtures containing at least one nitrite rubber and at least one release agent, which are characterized by a particular average particle diameter, are provided. These mixtures have particularly low emissions and are outstandingly suitable for producing materials and components for indoor applications. 2. The pulverulent mixture according to claim 1 , wherein particles of the pulverulent mixture have an average particle diameter Dof 0.05 to 3 mm claim 1 , particularly preferably in the range from 0.1 mm to 2 mm and in particular in the range from 0.2 mm to 1.5 mm.3. The pulverulent mixture according to claim 1 , wherein the particles have an average particle diameter Dof 0.01 to 2 mm claim 1 , preferably 0.04 mm to 1 mm claim 1 , particularly preferably 0.06 to 0.75 mm claim 1 , and in particular 0.08 mm to 0.12 mm.4. The pulverulent mixture according to claim 1 , wherein the nitrile rubber has an emission ratio E according to the general formula (I) of less than or equal to 0.22 mg/(kg*Mooney units) and particularly preferably less than or equal to 0.20 mg/(kg*Mooney units).5. The pulverulent mixture according to claim 1 , wherein the nitrile rubber component comprises either repeating units of acrylonitrile and 1 claim 1 ,3-butadiene claim 1 , preferably exclusively repeating units of acrylonstrile and 1 claim 1 ,3-butadiene claim 1 , or repeating units of acrylonitrile claim 1 , 1 claim 1 ,3-butadiene and one or more further copolymerizable monomers claim 1 , preferably repeating units of acrylonitrile claim 1 , 1 claim 1 ,3-butadiene and (I) one or more α claim 1 ,β-unsaturated monocarboxylic or dicarboxylic acids claim 1 , esters or amides thereof claim 1 , in particular repeating units of an alkyl ester of an α claim 1 ,β-unsaturated carboxylic acid claim 1 , very particularly preferably of methyl (meth)acrylate claim 1 , ethyl (meth)acrylate claim 1 , propyl (meth)acrylate claim 1 , n-butyl (meth)acrylate claim 1 , t-butyl (meth)acrylate claim 1 , ...

NITRILE RUBBERS HAVING LOW EMISSION VALUES

An improved polymerization process using a specific molecular weight regulator makes it possible to produce new nitrile rubbers featuring particularly low emission values and giving vulcanizates which have an advantageous profile of properties and which are of outstanding quality, in particular in odour-sensitive applications. 2. The nitrile rubber according to claim 1 , wherein the emission quotient E according to formula (I) is less than or equal to 0.22 mg/(kg*Mooney units).3. The nitrile rubber according to claim 2 , wherein the emission quotient E according to formula (I) is less than or equal to 0.20 mg/(kg*Mooney units).4. The nitrile rubber according to or which further comprises repeating units of one or more additional copolymerizable monomers.5. The nitrile rubber according to claim 1 , wherein the at least one conjugated diene is selected from (C-C) conjugated dienes and mixtures thereof.6. The nitrile rubber according to claim 5 , wherein the at least one conjugated diene is selected from 1 claim 5 ,2-butadiene claim 5 , 1 claim 5 ,3-butadiene claim 5 , isoprene claim 5 , 2 claim 5 ,3-dimethylbutadiene claim 5 , piperylene and mixtures thereof.7. The nitrile rubber according to claim 5 , wherein the at least one conjugated diene is 1 claim 5 ,3-butadiene.8. The nitrile rubber according to claim 1 , wherein the at least one α claim 1 ,β-unsaturated nitrile is selected from (C-C) α claim 1 ,β-unsaturated nitriles and mixtures thereof.9. The nitrile rubber according to claim 8 , wherein the at least one α claim 8 ,β-unsaturated nitrile is selected from acrylonitrile claim 8 , methacrylonitrile claim 8 , ethacrylonitrile and mixtures thereof.10. The nitrile rubber according to claim 9 , wherein the at least one α claim 9 ,β-unsaturated nitrile is acrylonitrile.11. The nitrile rubber according to having a Mooney viscosity ML 1+4 at 100° C. of from 10 to 150 Mooney units (MU).12. The nitrile rubber according to having a Mooney viscosity ML 1+4 at 100° C. of ...

NITRILE RUBBERS HAVING LOW EMISSION VALUES

An improved polymerization process using a specific molecular weight regulator makes it possible to produce new nitrile rubbers featuring particularly low emission values and giving vulcanizates which have an advantageous profile of properties and which are of outstanding quality, in particular in odour-sensitive applications. 2. The vulcanizable mixture according to claim 1 , wherein the nitrile rubber is prepared in emulsion in the presence of tertiary nonyl mercaptan claim 1 , wherein the emulsion polymerization is carried out up to a conversion of at least 60% by weight claim 1 , based on the sum of the monomers.3. The vulcanizable mixture according to claim 1 , wherein:the nitrile rubber is prepared emulsion in the presence of tertiary nonyl mercaptan, wherein the emulsion polymerization is carried out up to a conversion of at least 60% by weight, based on the sum of the monomers;{'sub': 3', '5, 'the at least one α,β-unsaturated nitrite monomer is selected from (C-C) α,β-unsaturated nitrites and mixtures thereof; and'}{'sub': 4', '6, 'the at least one conjugated diene monomer is selected from (C-C) conjugated dienes and mixtures thereof.'}4. The vulcanizable mixture according to claim 1 , wherein:the nitrile rubber is prepared in the presence of tertiary nonyl mercaptan;the at least one α,β-unsaturated nitrile monomer is selected from acrylonitrile, methacrylonitrile, ethacrylonitrile, and mixtures thereof; andthe at least one conjugated diene monomer is selected from 1,2-butadiene, 1,3-butadiene, isoprene, 2,3-dimethylbutadiene, piperylene and mixtures thereof.5. The vulcanizable mixture according to claim 1 , wherein:the nitrile rubber is prepared in the presence of tertiary nonyl mercaptan;the at least one α,β-unsaturated nitrile monomer is acrylonitrile; andthe at least one conjugated diene monomer is 1,3-butadiene.6. The vulcanizable mixture according to claim 1 , further comprising one or more fillers and no claim 1 , one or more additional additive(s).7. ...

STABILIZED RUBBERS

Novel rubbers are provided which are stabilized by a specific combination of at least three different anti ageing compounds. Said rubbers dispose of an increase storage stability as well as an improved colour stability over the short term as well as over the long term. The invention also relates a process for producing said novel rubbers, vulcanizable mixtures based thereon, a process for producing vulcanizates from those mixtures and the vulcanizates obtained. 2. The stabilized rubber according to claim 1 , wherein the rubber is a unsaturated claim 1 , partially or fully hydrogenated rubber selected from the group consisting of nitrile rubbers (NBR) claim 1 , hydrogenated nitrile rubbers (HNBR) claim 1 , styrene-butadiene copolymers (SBR) claim 1 , polychloroprene (CR) claim 1 , polybutadiene (BR) claim 1 , isobutylene-isoprene copolymers (IIR) claim 1 , brominated isobutylene-isoprene copolymers (BIIR) claim 1 , chlorinated isobutylene-isoprene copolymers (CIIR) claim 1 , butadiene-C-alkyl acrylate copolymers (ABR) claim 1 , acrylonitrile isoprene rubber (NIR) claim 1 , styrene isoprene rubber (SIR) claim 1 , polyisoprene (IR) claim 1 , natural rubber (NR) claim 1 , epoxidized natural rubber (ENR) claim 1 , and mixtures thereof.3. The stabilized rubber according to claim 1 , wherein the rubber is NBR or SBR.4. The stabilized rubber according to claim 1 , comprising:(i) at least one compound of formula (I) [{'sup': '1', 'sub': 1', '30', '3', '10', '3', '10', '6', '24', '5', '23', '7', '30', '6', '29, 'Rmeans hydrogen; straight chain or branched, saturated or one or more times unsaturated, unsubstituted or substituted C-Calkyl; saturated or one or more times unsaturated C-Ccarbocyclyl; or C-Cheterocyclyl; C-Caryl; C-Cheteroaryl; C-Carylalkyl; C-Cheteroarylalkyl; polyoxyalkylene ether;'}, {'sup': '2', 'sub': 1', '4, 'Rare identical or different, and mean straight chain or branched C-Calkyl; and'}], '(ii) at least one compound of general formula (II) wherein'} [{'sup ...

VULCANISABLE COMPOSITIONS BASED ON EPOXY GROUP-CONTAINING NITRILE RUBBERS

There are provided novel vulcanizable compositions based on optionally fully or partly hydrogenated nitrile rubbers containing epoxy groups, specific acidic crosslinkers and crosslinking accelerators, as a result of which the use of conventional crosslinkers, such as sulphur in particular, is no longer required. The vulcanizates producible therefrom possess very good compression sets at room temperature, 100° C. and 150° C., and additionally exhibit high tensile strength combined with good elongation at break.

Nitrile rubbers coupled via bisdihydropyrazole groups, production thereof and use thereof

A nitrile rubber coupled via bisdihydropyrazole groups is produced by reacting a nitrile rubber which is based on conjugated dienes, α,β-unsaturated nitriles and optionally further copolymerizable monomers as monomers, may have been hydrogenated and has covalently bonded tetrazole groups with a bifunctional ene compound in which the ene groups can each be reacted with the tetrazole groups to give dihydropyrazole groups. 1. A process for producing a nitrile rubber coupled via bisdihydropyrazole groups comprising reacting a nitrile rubber which is based on conjugated dienes , α ,β-unsaturated nitriles , and no , one or more further copolymerizable monomers as monomers , and has covalently bonded tetrazole groups with a bifunctional ene compound in which the ene groups are each reacted with the tetrazole groups to give dihydropyrazole groups.3. The process according to any one of to , comprising reacting a nitrile rubber which has been hydrogenated.5. The process according to claim 4 , wherein the compound of the general formula (I). R is a C-C-alkyl radical and Ris a —CHR—C(═O)OR— radical where Ris C-C-alkyl and Ris C-C-alkylene claim 4 , and R″ is phenyl claim 4 , tolyl claim 4 , naphthyl or anthracenyl.6. The process according to claim 5 , wherein Ris C-C-alkylene which is interrupted by (i) carboxyl groups claim 5 , or (ii) aryl groups or (iii) carboxyl and aryl groups.8. The process according to claim 7 , wherein the bifunctional ene compound has two maleimide groups wherein the nitrogen atoms are joined to one another via a C-C-alkyl radical which is either unsubstituted or substituted.9. The process according to claim 8 , wherein the C-C-alkyl radical is interrupted by (i) heteroatoms claim 8 , or (ii) aryl groups or (iii) heteroatoms and aryl groups.11. The process according to claim 10 , wherein the reaction step a) is followed by a hydrogenation as step h).12. A nitrile rubber coupled via bisdihydropyrazole groups.1311. The nitrile rubber according to claim ...

COLOR-STABLE NITRILE RUBBERS

What are provided are colour-stable, low-salt nitrile rubbers and a process for production thereof under specific conditions for the coagulation and/or washing of the nitrite rubber. Additionally obtainable are the corresponding volcanizable mixtures based on this nitrile rubber, a process for producing vulcanizates from these mixtures and the resultant vulcanizates having excellent processing properties. 2. The nitrile rubber according to claim 1 , wherein the aluminium index E is 3 ppm/MU to not more than 35 ppm/MU claim 1 , based on the nitrile rubber.3. The nitrile rubber according to claim 1 , additionally comprising repeat units of one or more further copolymerizable monomers.4. The nitrile rubber according to claim 1 , wherein the nitrile rubber is a copolymer of acrylonitrile and 1 claim 1 ,3-butadiene.5. The nitrile rubber according claim 1 , wherein the proportions of claim 1 , or the sum total of the conjugated dienes is in 20% to 95% by weight claim 1 , based on the nitrile rubber claim 1 , and the proportion of claim 1 , or the sum total of the α claim 1 ,β-unsaturated nitriles is 5% to 80% by weight claim 1 , based on the nitrile rubber claim 1 , where the proportions of all the monomers add up to 100% by weight in each case.6. A process for producing the nitrile rubbers according to claim 1 , by emulsion polymerization of at least one α claim 1 ,β-unsaturated nitrile monomer and at least one conjugated diene monomer claim 1 , the process comprising:(i) after the polymerization, coagulating the latex which contains the nitrile rubber using at least one salt, wherein the at least one salt comprises at least one aluminum salt, and the coagulation is effected at a pH of 1 to 4.5, preferably from 1 to 4, more preferably from 1 to 3.75 and especially from 1 to 3.5, and(ii) subsequently washing the nitrile rubber at a pH 6 to 12, preferably from 6.25 to 11, more preferably from 6.5 to 10.5 and especially from 6.75 to 10.57. The process for producing nitrile ...

Process for the production of water and solvent-free nitrile rubbers

Process for the production of water and solvent-free nitrile rubbers

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 concentrator unit, b.) reheating the concentrated fluid from step a.) in at least one reheating unit and c.) feeding the reheated concentrated fluid from step b.) into at least one reheating unit.

Cross-linking agent for nitrile rubbers containing isocyanate groups

Durch die Verwendung spezieller Vernetzer, die mindestens zwei Isocyanatgruppen enthalten, können Hydroxylgruppen-haltige optional hydrierte Nitrilkautschukterpolymere erfolgreich vernetzt werden. Bevorzugte Vernetzer weisen Allophanat-, Biuret-, Uretdion-, Uretonimin-, verbrückte Carbamat-, Carbodiimid-, Isocyanurat-, Iminooxadiazindion- oder Oxadiazintrion-Strukturelemente auf.

Cross-linking agents containing isocyanate groups for nitrile rubbers

By using specific cross-linking agents which contain at least two isocyanate groups, optionally hydrated nitrile rubber terpolymers containing hydroxyl groups can be cross-linked successfully. Preferred cross-linking agents have allophanate, biuret, uretdione, uretoneimine, bridged carbamate, carbodiimide, isocyanurate, iminooxadiazindione or oxadiazintrione structural elements.

nitrile rubber, process for producing nitrile rubbers, vulcanizable mixture, process for producing vulcanizable mixture, process for producing vulcanized, and vulcanized

são preparadas borrachas de nitrila pobres em sais de cor estável e um processo para sua produção mediante condições especiais para a coagulação ou lavagem da borracha de nitrila. é ainda possível obter as misturas vulcanizáveis correspondentes à base de borracha de nitrila, um processo para a fabricação de vulcanizados dessas misturas, bem como os vulcanizados assim obtidos com propriedades de processamento excelentes. stable salt-poor nitrile rubbers are prepared and a process for their production under special conditions for coagulation or washing of nitrile rubber. It is further possible to obtain the corresponding vulcanizable mixtures based on nitrile rubber, a process for the manufacture of vulcanisates of such mixtures, as well as the vulcanisates thus obtained with excellent processing properties.

Nitrile rubbers having low emission values

一種改進的聚合方法，該方法使用一特定分子量調節劑而能夠生產新丁腈橡膠，該等丁腈橡膠具有特別低的排放值並且產生的硫化橡膠具有多種有利特性特徵並且具有出色品質，特別是在氣味敏感應用中。

Color stable nitrile rubbers

Bereitgestellt werden farbstabile, salzarme Nitrilkautschuke und ein Verfahren zu deren Herstellung unter speziellen Bedingungen für die Koagulation bzw. Wäsche des Nitrilkautschuks. Zugänglich sind ferner die korrespondierenden vulkanisierbare Mischungen auf Basis dieses Nitrilkautschuks, ein Verfahren zur Herstellung von Vulkanisaten aus diesen Mischungen sowie die dabei erhaltenen Vulkanisate mit exzellenten Verarbeitungseigenschaften.

Color stable nitrile rubbers

Vulcanizable compositions based on nitrile rubbers containing epoxy groups

Cross-linking agents containing isocyanate groups for nitrile rubbers

By using specific cross-linking agents which contain at least two isocyanate groups, optionally hydrated nitrile rubber terpolymers containing hydroxyl groups can be cross-linked successfully. Preferred cross-linking agents have allophanate, biuret, uretdione, uretoneimine, bridged carbamate, carbodiimide, isocyanurate, iminooxadiazindione or oxadiazintrione structural elements.

vulcanizable composition, process for producing a vulcanizable composition, process for producing vulcanized, and, vulcanized

resumo composição vulcanizável, processo para a produção de uma composição vulcanizável, processo para a produção de vulcanizados, e, vulcanizados são proporcionadas novas composições vulcanizáveis à base de borrachas de nitrila opcionalmente totalmente ou parcialmente hidrogenadas contendo grupos epóxi, reticulantes ácidos específicos e aceleradores de reticulação, como um resultado do qual o uso de reticulantes convencionais, tais como, em particular, o enxofre, não é mais necessário. os vulcanizados que podem ser produzidos a partir das mesmas possuem muito bons conjuntos de compressão a temperatura ambiente, 100 °c e 150 °c, e adicionalmente exibem elevada resistência a tração combinada com bom alongamento na ruptura. 13 1/1 vulcanizable composition, process for producing a vulcanizable composition, process for producing vulcanizable, and vulcanized novel vulcanizable compositions based on optionally fully or partially hydrogenated nitrile rubbers containing epoxy groups, specific acid crosslinkers and crosslinking accelerators are provided. as a result of which the use of conventional crosslinkers such as in particular sulfur is no longer required. Vulcanisates that can be produced from them have very good compression assemblies at room temperature, 100 ° C and 150 ° C, and additionally exhibit high tensile strength combined with good elongation at break. 13 1/1

Vulcanizable polymer compositions

A novel vulcanizable polymer composition is provided which is characterized by a specific combination of a polyamine crosslinking agent, a particular crosslinking accelerator and an alkali metal salt. Furtheron polymer vulcanizates on the basis of such polymer compositions as well as a method for preparing such polymer vulcanizates is provided, in particular in the form of mouldings or shaped parts.

VULCANIZABLE COMPOSITION, PROCESS FOR THE PRODUCTION OF A VULCANIZABLE COMPOSITION, PROCESS FOR THE PRODUCTION OF VULCANIZED, AND, VULCANIZED

composição vulcanizável, processo para a produção de uma composição vulcanizável, processo para a produção de vulcanizados, e, vulcanizados. são proporcionadas novas composições vulcanizáveis à base de borrachas de nitrila opcionalmente totalmente ou parcialmente hidrogenadas contendo grupos epóxi, reticulantes ácidos específicos e aceleradores de reticulação, como um resultado do qual o uso de reticulantes convencionais, tais como, em particular, o enxofre, não é mais necessário. os vulcanizados que podem ser produzidos a partir das mesmas possuem muito bons conjuntos de compressão a temperatura ambiente, 100 °c e 150 °c, e adicionalmente exibem elevada resistência a tração combinada com bom alongamento na ruptura. vulcanizable composition, process for the production of a vulcanizable composition, process for the production of vulcanized, and, vulcanized. new vulcanizable compositions based on nitrile rubbers optionally totally or partially hydrogenated containing epoxy groups, specific acid crosslinkers and crosslinking accelerators are provided, as a result of which the use of conventional crosslinkers, such as, in particular, sulfur, is not more needed. vulcanized products that can be produced from them have very good compression sets at room temperature, 100 ° C and 150 ° C, and additionally exhibit high tensile strength combined with good elongation at break.

Process for the production of water and solvent-free nitrile rubbers

Isocyanate group-containing cross-linkers for nitrile rubbers

By the use of special cross-linkers that contain at least two isocyanate groups, hydroxyl group-containing optionally hydrogenated nitrile rubber polymers can be successfully cross-linked. Preferred cross-linkers contain allophanate, biuret, uretdione, uretonimine, bridged carbamate, carbodiimide, isocyanurate, iminooxadiazinedione or oxadiazinetrione structural elements.

Vulcanisable compounds on the basis of nitrile rubbers containing epoxy groups

Vulcanizable polymer compositions

A novel vulcanizable polymer composition is provided which is characterized by a specific combination of a polyamine crosslinking agent and a particular crosslinking accelerator. Furtheron polymer vulcanizates on the basis of such polymer compositions as well as method for preparing such polymer vulcanizate is provided, in particular in the form of mouldings or shaped parts.

Method for producing purified nitrile rubbers

A novel method for producing a purified nitrile rubber is disclosed, wherein the nitrile rubber containing special impurities is subjected to defined ultrafiltration, thus making it possible to substantially reduce the content of the special impurities in the nitrile rubber.

Nitrile rubbers having low emission values.

Mediante un procedimiento de polimerización mejorado con el uso de un regulador del peso molecular especial pueden producirse nuevos cauchos de nitrilo que se caracterizan por unos valores de emisión especialmente bajos y que llevan a vulcanizados con un perfil de propiedades ventajoso, que son de excelente calidad en particular en aplicaciones sensibles al olor.

Nitrile rubbers with low emissions

Process for preparing nitrile rubbers in organic solvents

Isocyanate group-containing cross-linkers for nitrile rubbers

By the use of special cross-linkers that contain at least two isocyanate groups, hydroxyl group-containing optionally hydrogenated nitrile rubber polymers can be successfully cross-linked. Preferred cross-linkers contain allophanate, biuret, uretdione, uretonimine, bridged carbamate, carbodiimide, isocyanurate, iminooxadiazinedione or oxadiazinetrione structural elements.

EVM cathode binders for battery cells using γ-valerolactone as processing solvent

The invention relates to a polymer comprising or essentially consisting of monomer units derived from ethylene, vinylacetate and optionally, a termonomer selected from glycidyl methacrylate, vinyl methac- rylate, and maleic anhydride, wherein the weight content of monomer units derived from vinylacetate is greater than 50 wt.-%, relative to the total weight of the polymer. The polymer is useful for manufactur- ing a cathode for a battery cell. The invention further relates to a cathode of a battery cell comprising the polymer as well as to a composition comprising the polymer and γ-valerolactone.

HNBR CATHODE BINDERS FOR BATTERY CELLS USING γ-VALEROLACTONE AS PROCESSING SOLVENT

The invention relates to a polymer comprising or essentially consisting of monomer units derived from 1,3-butadiene, acrylonitrile and optionally, methacrylic acid, wherein the weight content of monomer units derived from 1,3-butadiene is at most 65 wt.-%, relative to the total weight of the polymer. The polymer is useful for manufacturing a cathode for a battery cell. The invention further relates to a cathode of a battery cell comprising the polymer as well as to a composition comprising the polymer and γ-valerolactone.

Powderous polymer binder for high viscous processing for anode manufacture

A composition comprising a non-spherical powderous cross-linked polymer obtained by grinding, wherein the cross-linked polymer comprises the monomer units 1,3 butadiene, (hydroxyethyl)methacrylate and trimethylolpropane trimethacrylate, and the non-spherical powderous cross-linked polymer has a particle size D(90) of 180 – 450 µm. The compositionfurther comprises a silica anti-caking agent. The compositions are used as binders in anodes of a rechargeable battery.

Powderous rubbers with lithium stearate, and use thereof as an electrode binder

The invention relates to powderous rubbers with Lithium salts as antidusting agents and use thereof as a binder in battery applications.

Pulverulent mixture of precrosslinked nitrile rubbers

What are provided are pulverulent mixtures based on specific nitrile rubbers and at least one separating agent, and also a process for producing vulcanizable mixtures and vulcanizates made from these pulverulent mixtures, and the resultant vulcanizates and their use, especially in tyre treads, where an improvement in wet skid resistance, dry grip and rolling resistance delivers is observed with simultaneously good mixing characteristics.

Nitrilkautschuke

Acetoacetoxyalkyl group containing nitrile rubbers and use as positive cathode binder

The invention teaches a polymer which consists of monomer units acrylonitrile, 1,3-butadiene and acetoacetoxyethyl methacrylate. The polymer can be an unhydrogenated or a hydrogenated polymer. The invention also teaches a use of the polymer as a positive cathode binder for a rechargeable battery. The polymer according to the present invention has advantages over conventional polymers based at least on polyvinylidene fluoride polymer (PVDF).

Antigenos de proteina utiles para la terapia del cancer y la vacunacion.

Uso de una proteína PStS1 micobacteriana de tipo natural o recombinante en la preparación de una vacuna o una composición terapéutica para el tratamiento del cáncer.

Mezcla pulverulenta de cauchos de nitrilo reticulados previamente.

Lo que se proporciona son mezclas pulverulentas a base de cauchos de nitrilo específicos y al menos un agente de separación, así como un proceso para producir mezclas vulcanizables y vulcanizados fabricados a partir de estas mezclas pulverulentas, y los vulcanizados resultantes y su uso, especialmente en las bandas de rodadura, donde se observa una mejora en la resistencia al derrape en húmedo, el agarre en seco y la resistencia al rodamiento, simultáneamente con buenas características de mezcla.

Mycobakterielle proteinantigene für krebstherapie und impfung

VULCANIZABLE COMPOSITIONS BASED ON EPOXY GROUP-CONTAINING ETHYLENE-VINYL ACETATE COPOLYMERIZATES

Mycobakterielle Proteinantigene für Krebstherapie und Impfung

Protein antigens useful for cancer therapy and vaccination

The present invention relates to the use of highly immunogenic protein antigens for vaccination and immunotherapy of cancer in humans and animals. In particular, the present invention relates to the use of a wild-type or a recombinant mycobacterial PstS1 protein or wild-type or recombinant Hsp16 protein for the preparation of a vaccine or therapeutical composition for the treatment of cancer, in particular for the treatment of urothelial carcinoma of the bladder or mama carcinoma.

Vulkanisierbare zusammensetzungen auf basis von epoxygruppen-haltigen ethylen-vinylacetat-copolymerisaten

Die Erfindung betrifft vulkanisierbare Zusammensetzungen enthaltend (a) mindestens ein Epoxygruppen-haltiges Ethylen-Vinylacetat-Copolymerisat mit einem Vinylacetatgehalt von mindestens 20 Gew.-%, bevorzugt mindestens 30 Gew.-%, besonders bevorzugt mindestens 40 Gew.-% bezogen auf das Epoxygruppen-haltige Ethylen-Vinylacetat-Copolymerisat und (b) mindestens einen carboxylierten Nitrilkautschuk.

Compuestos vulcanizables a base de copolímeros de etileno y acetato de vinilo con contenido de grupos epóxidos

Compuesto vulcanizable que contiene (a) al menos un copolimero de etileno y acetato de vinilo con contenido de grupos epoxidos con un contenido de acetato de vinilo de al menos un 20 % en peso, preferentemente de al menos un 30 % en peso, de manera particularmente preferente de al menos un 40 % en peso, referido al copolimero de etileno y acetato de vinilo con contenido de grupos epoxidos y (b) al menos un caucho de nitrilo carboxilado, siendo la proporcion de (a) con respecto a (b) de 1 : 3 a 3 : 1, preferentemente de 1 : 1.

Powderous polymer binder for high viscous processing for anode manufacture

A composition comprising a non-spherical powderous cross-linked polymer obtained by grinding, wherein the cross-linked polymer comprises the monomer units 1,3 butadiene, (hydroxyethyl)methacrylate and trimethylolpropane trimethacrylate, and the non-spherical powderous cross-linked polymer has a particle size D(90) of 180 ? 450 µm. The compositionfurther comprises a silica anti-caking agent. The compositions are used as binders in anodes of a rechargeable battery.

Sposób wytwarzania kauczuków nitrylowych w rozpuszczalnikach organicznych

Verfahren zur herstellung von nitrilkautschuken in organischen lösungsmitteln

Bereitgestellt wird ein neues und verbessertes Verfahren zur Herstellung von Nitrilkautschuken durch radikalische Polymerisation in speziellen Lösungsmittelgemischen. Die erhaltenen Nitrilkautschuke können anschließend einer Hydrierung unterzogen werden. Das Verfahren zeichnet sich durch exzellente Zeit-Umsatz Kurven aus.

Functionalized pre-crosslinked hydrogenated nitrile rubbers as aqueous based cathode binders for li-ion battery applications

The invention relates to a functionalized and pre-crosslinked hydrogenated nitrile rubber as a binder in a cathode of a battery cell, to a cathode of a battery cell comprising said polymer, and to a composition comprising said polymer and an organic solvent.

Mistura pulverulenta de borrachas de nitrila pré-reticuladas

MISTURA PULVERULENTA DE BORRACHAS DE NITRILA PRÉRETICULADAS. O que é fornecido são misturas pulverulentas à base de borrachas de nitrila específicas e pelo menos um agente separador, e também um processo para produzir misturas vulcanizáveis e vulcanizados produzidos a partir dessas misturas pulverulentas, e os vulcanizados resultantes e seu uso, especialmente em bandas de rodagem de pneus, em que um aprimoramento na resistência à derrapagem em piso molhado, aderência em piso seco e resistência ao rolamento é observado simultaneamente com boas características de mistura.