申请人:THE YOKOHAMA RUBBER CO., LTD.
公开号:US11180634B2
公开(公告)日:2021-11-23
The present invention provides a rubber composition for a tire, the rubber composition containing: a diene rubber; silica; and a heterocyclic compound (where, the heterocyclic compound does not have a silicon atom) having a hydrocarbon group having from 3 to 30 carbons and at least one type of heterocycle selected from the group consisting of a piperazine ring, a morpholine ring, and a thiomorpholine ring; an average glass transition temperature of the diene rubber being −50° C. or higher; a content of the silica being from 80 to 200 parts by mass per 100 parts by mass of the diene rubber; and a content of the heterocyclic compound being from 0.5 to 20% by mass with respect to the content of the silica. Such rubber composition has excellent processability, exhibits excellent wet grip performance and has low rolling resistance when the rubber composition is formed into a tire.
本发明提供了一种用于轮胎的橡胶组合物,该橡胶组合物包含:二烯橡胶;白炭黑;杂环化合物(其中,杂环化合物不含硅原子),该杂环化合物具有 3 至 30 个碳原子的烃基以及至少一种选自哌嗪环、吗啉环和硫吗啉环的杂环;二烯橡胶的平均玻璃化转变温度为 -50°C 或更高;白炭黑的含量为每 100 份二烯橡胶的质量的 80 至 200 份;杂环化合物的含量为相对于二烯橡胶质量的 0.5 至 20%。或更高;每 100 份二烯烃橡胶中白炭黑的含量为 80 至 200 份(以质量计);杂环化合物的含量为白炭黑含量的 0.5 至 20%(以质量计)。这种橡胶组合物具有优异的加工性能,在将橡胶组合物制成轮胎时,具有优异的湿抓地性能和较低的滚动阻力。