申请人:Bridgestone Corporation
公开号:EP0846724A2
公开(公告)日:1998-06-10
Provided is a rubber composition which is improved in a dispersibility of silica into rubber, a heat generating property and an abrasion property. The rubber composition comprises 15 to 85 parts by weight of silica per 100 parts by weight of a rubber component comprising natural rubber and/or diene base synthetic rubber and a tertiary amine compound represented by the following Formula (I) blended in a proportion of 1 to 15 % by weight based on the amount of silica described above:
wherein R1 represents an alkyl group, alkenyl group or alkoxyl group having 1 to 36 carbon atoms and hydroxy-substituted group thereof, a benzyl group, a benzyl group substituted with an alkyl group or alkenyl group having 4 to 36 carbon atoms, or a group represented by one of the following Formulas (II); and R2 and R3 represent independently an alkyl group or alkenyl group having 1 to 36 carbon atoms, a benzyl group, a cyclohexyl group and a hydroxy-substituted group thereof:
wherein R4 represents an alkyl group or alkenyl group having 1 to 36 carbon atoms; R5 represents an ethylene group or a propylene group; X represents hydrogen, an alkyl group, alkenyl group, alkyloyl group or alkenyloyl group having 1 to 18 carbon atoms; A represents an alkylene group or hydroxyalkylene group having 2 to 6 carbon atoms; m is an integer of 1 to 10, and when m is 2 or more, respective A may be the same or different; and n is an integer of 1 to 10.
本发明提供了一种橡胶组合物,该组合物在白炭黑在橡胶中的分散性、发热性能和耐磨性能方面均有改善。该橡胶组合物包括每 100 份(重量)由天然橡胶和/或二烯烃基合成橡胶组成的橡胶组分中含 15 至 85 份(重量)白炭黑,以及由下式(I)代表的叔胺化合物,以上述白炭黑量为基础,按 1 至 15 %(重量)的比例混合:
其中 R1 代表具有 1 至 36 个碳原子的烷基、烯基或烷氧基及其羟基取代基、苄基、被具有 4 至 36 个碳原子的烷基或烯基取代的苄基或由下式(II)之一代表的基团;R2 和 R3 独立地代表具有 1 至 36 个碳原子的烷基或烯基、苄基、环己基及其羟基取代基:
其中 R4 代表具有 1 至 36 个碳原子的烷基或烯基;R5 代表乙烯基或丙烯基;X 代表氢、具有 1 至 18 个碳原子的烷基、烯基、烷氧基或烯酰基;A 代表具有 2 至 6 个碳原子的亚烷基或羟基亚烷基;m 为 1 至 10 的整数,当 m 为 2 或 2 以上时,各自的 A 可以相同或不同;n 为 1 至 10 的整数。