Patent ID: 6794428
Filing Date: 2004-09-21
Classification: C08K

Abstract:
A rubber composition comprising:a) at least 30 parts per hundred rubber (phr) of a rubber having at least 30 weight percent of repeating units derived from polymerizing one or more conjugated diene monomers, b) at least 20 phr of a carbon black, or combination of carbon black with another filler such as silica, or clay, and c) at least about 0.5 phr of a coupler for said carbon black, said coupler having at least 1) an amine group, 2) a carbonyl group, and 3) either a thiol group or a mono, di or polysulfidic linkage, wherein said coupler is the reaction product of at least one amino compound and at least a second compound, said second compound having both a thiol or polysulfidic linkage and another group which can couple through a condensation reaction with said amino compound forming an ester or amide linkage, and optionally said reaction product further reacted with elemental sulfur to form additional polysulfiddic linkages.