A method for producing a vulcanized rubber in which a flavan compound of the formula (I)
wherein R¹, R², R⁴ and R⁵ independently of one another are hydrogen or an aliphatic group having 1-6 carbon atoms, or R¹ and R², and/or R⁴ and R⁵, may form an alicyclic ring having 4-10 carbon atoms in combination, R³ is hydrogen or an aliphatic group having 1-6 carbon atoms, and X and Y independently of one another are hydrogen, hydroxy or an aliphatic group having 1-8 carbon atoms; is compounded to rubber in a kneading step at a high temperature and a rubber composition which comprises the flavan compound together with cobalt carbonate or an organic cobalt compound and a methylene donor: and the vulcanized rubber produced through the method or from the rubber composition exhibits excellent rubber properties such as high hardness and free from fuming problem.
一种生产
硫化橡胶的方法,其中含有式 (I) 的黄烷化合物
其中 R¹、R²、R⁴ 和 R⁵ 相互独立地为氢或具有 1-6 个碳原子的脂肪族基团,或 R¹ 和 R²,和/或 R⁴ 和 R⁵ 可结合形成具有 4-10 个碳原子的脂环,R³ 为氢或具有 1-6 个碳原子的脂肪族基团,X 和 Y 相互独立地为氢、羟基或具有 1-8 个碳原子的脂肪族基团;在高温下,通过捏合步骤将黄烷化合物与
碳酸钴或有机
钴化合物及亚甲基供体复合成橡胶:以及通过该方法或由该橡胶组合物生产的
硫化橡胶具有优异的橡胶性能,例如高硬度和无发烟问题。