Abstract: 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.

Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.

Abstract: This invention relates to novel catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.

Abstract: The invention relates to functionalized diene rubbers with trimethylolpropane and fatty acid, to a process for production there of and use thereof for the production of wet-skid-resistant and low-rolling-resistance motor-vehicle tire treads with high abrasion resistance.

Abstract: A process of degrading nitrile rubbers comprises subjecting them to a metathesis reaction in the presence of specific catalysts with increased activity.

Abstract: 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.

Abstract: The present invention relates to polymers functionalized by terminal groups, where these have, at the chain end, a silane-containing carbinol group of the formula (I) where R1, R2, R3, R4 are identical or different and are H, alkyl moieties, cycloalkyl moieties, aryl moieties, alkaryl moieties and aralkyl moieties, where these can comprise heteroatoms such as O, N, S, Si, A is a divalent organic moiety which can comprise, alongside C and H, heteroatoms such as O, N, S, Si.

Abstract: The present invention relates to a method to control a liquid feed stream carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity.

Abstract: The present invention relates to a process for devolatilizing polymer-containing media such as, in particular, polymer melts, polymer solutions and dispersions and also devolatilisation apparatuses for carrying out the abovementioned process.

Abstract: The present invention relates to polymers functionalized by terminal groups, where the polymers have a trialkylsilyloxy group of the formula (I) at the end of the chain, where R1, R2, and R3 can be identical or different and are alkyl, cycloalkyl, and aralkyl moieties which can comprise heteroatoms such as O, N, S, and Si.

Abstract: The invention relates to neodymium-catalysed polybutadienes (NdBR) comprising >95 wt % of cis-1,4 units and <1 wt % of 1,2-vinyl content, based on the neodymium-catalysed polybutadiene, wherein the NdBR evinces a molar mass breakdown of not less than 25%.