Patent ID: 6057392
Filing Date: 2000-05-02
Classification: C08K

Abstract:
A method of processing a rubber composition comprising thermomechanically mixing the rubber composition while maintaining a rubber temperature in a range of from 160.degree. C. to 190.degree. C. for a period of time ranging from 4 to 8 minutes, wherein said rubber composition is(i) 100 parts by weight of at least one sulfur vulcanizable elastomer containing olefinic unsaturation;(ii) 10 to 250 phr of a filler selected from the group consisting of silica, carbon black and mixtures thereof; and(iii) 0.5 to 50 phr of an ester of the formula: ##STR7## wherein R.sup.1 is selected from the group consisting of alkyls having from 16 to 18 carbon atoms and alkenyls having from 16 to 18 carbon atoms; and R.sup.2 is selected from the group consisting of alkyls having from 12 to 22 carbon atoms.