申请人:Otsuka Chemical Co., Ltd.
公开号:EP3147319A1
公开(公告)日:2017-03-29
Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R1, R2, R5, and R6 each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but R1 and R2 do not both simultaneously represent a hydrogen atom and R5 and R6 do not both simultaneously represent a hydrogen atom, R3 and R4 each represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1.
本发明提供了一种橡胶组合物,它比传统橡胶组合物具有更好的耐候性,并能抑制橡胶制品表面变色。该橡胶组合物含有至少一种选自天然橡胶和二烯基合成橡胶的橡胶成分,以及至少一种由式(I)表示的双苯二胺化合物。在式 (I) 中,R1、R2、R5 和 R6 各自独立地代表氢原子、碳原子数为 1-10 的烷基或苯基,但 R1 和 R2 不能同时代表氢原子,R5 和 R6 不能同时代表氢原子,R3 和 R4 各自独立地代表碳原子数为 1-8 的烷基或芳烷基,A 代表碳原子数为 1-12 的亚烷基,l、m 和 n 各自代表 0 或 1 的整数。