Vulcanizable blend comprising partially hydrogenated...

Details Vulcanizable blend comprising partially hydrogenated... Vulcanizable blend comprising partially hydrogenated...

C - Chemistry, Metallurgy

08

L

C08L 15/00 (2006.01) B60C 1/00 (2006.01) C08K 3/36 (2006.01) C08L 21/00 (2006.01)

Patent

CA 2681336

Raw elastomeric composition comprising: (a1) from 30 to 90% by weight of a partially hydrogenated vinylarene- conjugated diene random elastomeric copolymer; (a2) from 10 to 70% by weight of one or more diene rubbers; (b) from 10 to 150 phr of silica; (c) from 0.1 to 20 phr of a coupling agent based on silane; (d) from 0.1 to 10 phr of a vulcanization agent; the above composition being characterized in that the partially hydrogenated vinylarene -conjugated diene random copolymer has a structure which has nodes statistically distributed in the macromolecule, from which polymeric chains branch out, the bond between said nodes and said branches being a carbon- carbon bond.

L'invention porte sur une composition élastomère brute comprenant : (a1) de 30 à 90 % en poids d'un copolymère élastomère statistique vinylarène-diène conjugué partiellement hydrogénés ; (a2) de 10 à 70 % en poids d'un ou plusieurs caoutchoucs diéniques ; (b) de 10 à 150 parties de silice pour cent parties de caoutchouc ; (c) de 0,1 à 20 parties d'un agent de couplage à base de silane pour cent parties de caoutchouc ; (d) de 0,1 à 10 parties d'un agent de vulcanisation pour cent parties de caoutchouc. La composition ci-dessus est caractérisée par le fait que le copolymère statistique vinylarène-diène conjugué partiellement hydrogéné a une structure qui a des nAEuds statistiquement distribués dans la macromolécule, à partir desquels les chaînes polymère se ramifient, la liaison entre lesdits nAEuds et lesdites ramifications étant une liaison carbone-carbone.

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