| abstract |
Elastomer composition comprising (i) at least one elastomer; (ii) from 5 to 75 phr of an extender oil comprising at least one vegetable oil derivative selected from one or more of: a. a triglyceride mixture comprising one or more of the following oligomeric structures: R4- [OC (O) -R1-C (O) -O-CH2-CH (OR2) -CH2] nO-R3 in which R1 is selected from among C2-C22 alkylene, R2 is selected from one or more of the following groups consisting of C6-C24 dicarboxylic acid residues and C6-C24 monocarboxylic acid residues, R3 is selected from one or more of the following groups which consist of H, C6-C24 dicarboxylic acid residues and C6-C24 monocarboxylic acid residues, R4 is an alkyl group, n is an integer greater than or equal to 2, said C6-C24 dicarboxylic acid residues of R2 being esterified and R3 with monoalcohols and said triglyceride mixture having a number average molecular weight (Mn) of between 800 and 10,000. b. triglycerides of one or more long chain carboxylic acids that include at least one carboxylic acid containing adjacent hydroxyl groups, c. esters of polyols with at least one monocarboxylic acid and at least one dicarboxylic acid, said esters being different from triglycerides; (iii) at least one selected from - from 10 to 150 phr of silica - from 10 to 150 phr of carbon black - from 0.1 to 10 phr of a vulcanizing agent. |