Bayer Aktiengesellschaft

Lanxess Deutschland Gmbh

Cristina Stere

Werner Obrecht

Thomas Scholl

Oskar Nuyken

Gerd Sylvester

Heike Windisch

Udo Sondermann

Mario Vierle

Lars Friebe

The random, hydrogenated copolymers according to the present invention of unsubstituted conjugated dienes and substituted conjugated dienes, having a glass transition temperature of &#x2266;&#x2212;60&#xb0; C., an enthalpy of fusion of &#x2266;100 J/g and a content of residual double bonds in the range from 0 to 80%, are suitable for the production of rubber moldings of all kinds which have good resistance to ageing and high resilience at low temperatures. In particular, various tire components and industrial rubber articles may be mentioned as rubber moldings. The copolymers are also suitable for the rubber modification of brittle thermoplastics.

Hydrogenated copolymers of unsubstituted and substituted conjugated dienes

The hydrogenated vinyl-polybutadienes according to the present invention have degrees of hydrogenation of from 20 to 100%, Mooney viscosities in the range of from 10 to 150 Mooney units (ML 1+4/100&#xb0; C.), glass transition temperatures (T) of &#x2266;&#x2212;57&#xb0; C. and enthalpies of fusion (&#x394;H) of &#x2266;30 J/g and having a microstructure with  

Hydrogenated vinyl-polybutadienes

The block copolymers according to the invention which are based on conjugated diolefins and polar monomers and are prepared in the presence of catalysts based on the rare earth metals have a high cis-1,4 content in the polydiene block and, because of their polar polymer part and their non-polar diene polymer part, can be used as agents which impart compatibility in the preparation of vulcanizates with a filler content for the production of tires and tire component in the preparation of thermoplastic elastomers or in the modification of thermoplastics.

Block copolymer based on conjugated diolefins and polar monomers

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Leverkusen, Germany

Cristina Stere