Sherman & Shalloway
Cis-1,4-polyisoprene rubber composition
 A cis-1,4-polyisoprene rubber composition capable of giving a vulcanizate having improved strength, said composition comprising (1) a synthetic cis-1,4-polyisoprene rubber having epoxy groups, (2) a compound having at least two primary amino groups, and (3) a sulfur vulcanization system. 
Nippon Zeon Co Ltd
C C
C08C C08K
inventional inventional
Toshihiro Shizuo Nagatoshi
Fujii Kitahara Sugi