Rubber compositions modified with sulfenamide derivatives

Details Rubber compositions modified with sulfenamide derivatives Rubber compositions modified with sulfenamide derivatives

C - Chemistry, Metallurgy

08

C

400/1116, 6/125,

C08C 19/22 (2006.01) C08K 5/47 (2006.01)

Patent

CA 1265298

Title: RUBBER COMPOSITIONS MODIFIED WITH SULFENAMIDE DERIVATIVES ABSTRACT OF THE DISCLOSURE Rubber composition having improved properties in the uncured as well as vulcanized form are described. The uncured rubber compositions of the invention are obtained by heating a mixture comprising (a) at least one rubber having an unsaturated carbon chain, and (b) a minor, property-improving amount of at least one 2-benzothiazyl sulfenamide derivative of the formula Image ( I) wherein each R is independently hydrogen, an alkyl, cycloalkyl or aryl group containing up to about 12 carbon atoms, or both R groups may be ethylene groups whose end carbon atoms are joined together through an oxygen atom to form a morpholinyl group to a temperature of at least about 140°C in the absence of vulcanizing and curing agents. Preferably, the uncured rubber composition also will contain at least one reinforcing filler such as carbon black. The invention also relates to methods of reducing the hysteresis of rubber compounds and the rolling resistance of tires wherein at least the tread portion of the tire is made from such modified rubbers.

488087

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