The present invention provides a polybutadiene rubber that is improved in terms of abrasion resistance and low loss property while maintaining processability. The polybutadiene rubber according to thepresent invention comprises: a polybutadiene (A) satisfying the conditions in which the ratio (Tcp/ML) of the 5 wt% toluene solution viscosity to the Mooney viscosity is 2.5 or more, and the weight average molecular weight is 60.0*104 or more; and a polybutadiene (B) satisfying the conditions in which the ratio (Tcp/ML) of the 5 wt% toluene solution viscosity to the Mooney viscosity is 3.5 or less, and the weight average molecular weight is 56.0*104 or less, wherein the polybutadiene (A)/the polybutadiene (B) is 10/90-80/20.
本发明提供一种在保持加工性的同时、耐磨耗性和低损耗性得到改善的聚丁二烯橡胶。本发明的聚丁二烯橡胶包含聚丁二烯(A)和聚丁二烯(B),上述聚丁二烯(A)满足5重量%甲苯溶液粘度与门尼粘度之比(Tcp/ML)为2.5以上和重均分子量为60.0×10以上的条件,上述聚丁二烯(B)满足5重量%甲苯溶液粘度与门尼粘度之比(Tcp/ML)为3.5以下和重均分子量为56.0×10以下的条件,上述聚丁二烯(A)/上述聚丁二烯(B)为10/90~80/20。
POLYBUTADIENE RUBBER
聚丁二烯橡胶
2020-04-21
Patent
Electronic Resource
Chinese