The present invention relates to a briquetting molded body of a rubbery block copolymer, a rubber composition, a rubber composition for crosslinking, and a tire tread. The purpose of the present invention is to obtain the briquetting molded body of the rubbery block copolymer which has excellent elongation at break and tensile strength after the formation of the rubber composition, has high wear resistance, and does not readily increase the feeling of fatigue of a user in real vehicle operation evaluation of a tire formed by using the rubber composition. The briquetting molded body of the rubbery block copolymer contains 5-95% by mass (inclusive) of a polymer block (a) having a vinyl aromatic monomer unit content of 22% by mass or less; and 5-95% by mass (inclusive) of a polymer block (b) having a vinyl aromatic monomer unit content of 23-50% by mass, an iodine number of 10-250, an ethylene structure of not less than 3% by mass, and a vinyl aromatic monomer block content of less than 10% by mass.
本发明涉及橡胶状嵌段共聚物的压块成型体、橡胶组合物、交联用橡胶组合物以及轮胎用胎面,其目的在于得到在形成橡胶组合物后的断裂伸长率和拉伸强度优异、耐磨耗性高、在使用橡胶组合物而成的轮胎的实车运转评价中使用者的疲劳感不容易增大的橡胶状嵌段共聚物的压块成型体。一种橡胶状嵌段共聚物的压块成型体,其含有:5质量%以上95质量%以下的聚合物嵌段(a),其乙烯基芳香族单体单元的含量为22质量%以下;以及5质量%以上95质量%以下的聚合物嵌段(b),其乙烯基芳香族单体单元的含量为23质量%以上且小于50质量%,碘价为10~250,乙烯结构≥3质量%,乙烯基芳香族单体嵌段<10质量%。
Briquetting molded body of rubbery block copolymer, rubber composition, rubber composition for crosslinking, and tire tread
橡胶状嵌段共聚物的压块成型体、橡胶组合物、交联用橡胶组合物以及轮胎用胎面
2022-01-04
Patent
Elektronische Ressource
Chinesisch
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