| abstract |
The invention provides a modified diene elastomer composition comprising a thermoplastic diene elastomer and a polysiloxane, characterized in that the polysiloxane is a branched silicone resin containing at least one group of the formula -X-CH=CH-R" (I) or -X-C≡C-R" (II), in which X represents a divalent organic linkage having an electron withdrawing effect with respect to the -CH=CH- or -C≡C- bond and/or containing an aromatic ring or a further olefinic double bond or acetylenic unsaturation, the aromatic ring or the further olefinic double bond or acetylenic unsaturation being conjugated with the olefinic unsaturation of -X-CH=CH-R" or with the acetylenic unsaturation of -X-C≡C-R", and X being bonded to the branched silicone resin by a C-Si bond, and R" represents hydrogen or a group having an electron withdrawing effect or any other activation effect with respect to the -CH=CH- or - C≡C- bond. |