Patent ID: 6221943
Filing Date: 2001-04-24
Classification: B60C,C08K,Y10T

Abstract:
A vulcanizable elastomeric composition comprising:an elastomer;a reinforcing filler selected from the group consisting of silica and mixtures thereof with carbon black;an alkylalkoxysilane;from zero to less than about 1 percent by weight, based on the weight of the silica, of bis(3-triethoxysilylpropyl) tetrasulfide;a processing aid selected from the group consisting of fatty acid esters of sorbitan, polyoxyethylene derivatives of fatty acid esters of sorbitan, and mixtures thereof;a cure agent comprising an effective amount of sulfur to provide a satisfactory cure of the composition, as measured by a cured property selected from the group consisting of the 300% Modulus and the molecular weight between crosslinks, M.sub.c, wherein the cured property of the composition is comparable to the same property of a satisfactorily cured composition containing bis(3-triethoxysilylpropyl) tetrasulfide in the absence of the alkylalkoxysilane and the processing aid.