A rubber composition (1) which comprises:
a rubber (A) such as natural rubber, isoprene rubber and the like;
a hydroxy flavan compound (B1) of the formula (I):
wherein R¹, R, R³, R⁴ and R⁵ are hydrogen or an aliphatic group and X and Y are hydrogen, hydroxy or an aliphatic group, such as 2,4,4-trimethyl-2',4',7-trihydroxyflavan (B2); and 2,2,4-trimethyl-1,2-dihydroquinoline polymer (C1) containing 1% or less by weight of a primary amine, 3% or less by weight of the monomer and 30% or more by weight of the dimer based on the total weight of the polymer, or a cromane compound (C2) which may be a novel cromane compound.
一种橡胶组合物(1),包括: 橡胶(A),例如
天然橡胶,
异戊二烯橡胶等; 一种羟基
黄酮化合物(B1),其
化学式为(I):其中R¹、R、R³、R⁴和R⁵为氢或脂肪基,X和Y为氢、羟基或脂肪基,例如2,4,4-三甲基-2',4',7-三羟基
黄酮(B2);以及含有1%或更少的一级胺,3%或更少的单体和30%或更多的二聚体的
2,2,4-三甲基-1,2-二氢喹啉聚合物(C1),基于聚合物的总重量,或者是一种可为新型的
环己烯化合物(C2)。