Patent Number: 7,714,049

Title: Compounding agent for rubber vulcanization containing amine salt compound of carboxylic group-containing disulfide, method for producing the same, rubber composition containing the same and pneumatic tire using the same as rubber for belt coat and/or belt edge cush

Abstract: A compounding agent for rubber vulcanization comprising an amine salt compound of a carboxylic acid group-containing disulfide having the formula (I): ##STR00001## wherein R.sub.1, R.sub.2 and R.sub.3 are independently hydrogen or a C.sub.1-C.sub.20 organic group which may have a heteroatom and/or a substituent group, and X is a C.sub.2-C.sub.20 organic group which may have a heteroatom and/or a substituent group, a method for producing the same and a rubber composition containing the same, capable of improving the vulcanization rate and vulcanized rubber physical properties, without having a detrimental effect on the scorch time.

Inventors: Choi; Wonmun (Hiratsuka, JP), Shimizu; Yuuki (Hiratsuka, JP)

Assignee: The Yokohama Rubber Co., Ltd.

International Classification: B32B 7/12 (20060101)

Expiration Date: 5/11/12018