公开(公告)号：US20170107358A1

公开(公告)日：2017-04-20

申请号：US15128406

申请日：2015-02-19

申请人： UBE INDUSTRIES, LTD. ,  SUMITOMO RUBBER INDUSTRIES, LTD.

发明人： Mitsuharu AMBE ,  Yuuto KANOU ,  Takeshi SHODA ,  Takahiro MABUCHI ,  Toshifumi HABA

IPC分类号： C08L9/06 ,  C08L9/00 ,  C08L7/00

CPC分类号： C08L9/06 ,  B60C1/00 ,  C08F4/7096 ,  C08F36/06 ,  C08L7/00 ,  C08L9/00 ,  C08L2205/02

摘要： The present invention provides a rubber composition for a tire having improved workability and abrasion resistance. A rubber composition for a tire according to the present invention comprises: a polybutadiene which has: (A) a Mooney viscosity (ML1+4,100° C.) being 43 or more; (B) a ratio (Tcp/ML1+4,100° C.) of 5 wt % toluene solution viscosity (Tcp) to Mooney viscosity (ML1+4,100° C.) being 0.9 to 2.3; (C) a stress relaxation time (T80) being 10.0 to 40.0 seconds, which is a time until a torque is attenuated by 80% when the torque at the end of ML1+4,100° C. measurement is 100%; and (D) a molecular weight distribution (Mw/Mn) being 2.50 to 4.00; another rubber (ii); and a rubber reinforcing material (iii).

公开(公告)号：US20170015766A1

公开(公告)日：2017-01-19

申请号：US15300766

申请日：2015-02-19

申请人： UBE INDUSTRIES, LTD.

发明人： Mitsuharu AMBE ,  Yuuto KANOU ,  Takeshi SHODA

IPC分类号： C08F136/06 ,  C08F4/602

CPC分类号： C08F136/06 ,  C08F4/6022 ,  C08F4/70 ,  C08F36/06 ,  C08F4/7096

摘要： The present invention provides a polybutadiene having improved workability and abrasion resistance. A polybutadiene according to the present invention has: (A) a Mooney viscosity (ML1+4,100° C.) being 43 or more; (B) a ratio (Tcp/ML1+4,100° C.) of 5 wt % toluene solution viscosity (Tcp) to Mooney viscosity (ML1+4,100° C.) being 0.9 to 2.3; (C) a stress relaxation time (T80) being 10.0 to 40.0 seconds, which is a time until a torque is attenuated by 80% when the torque at the end of ML1+4,100° C.measurement is 100%; and (D) a molecular weight distribution (Mw/Mn) being 2.50 to 4.00.

摘要翻译： 本发明提供了具有改进的可加工性和耐磨性的聚丁二烯。 根据本发明的聚丁二烯具有：（A）门尼粘度（ML1 + 4,100℃）为43以上; （B）5重量％甲苯溶液粘度（Tcp）与门尼粘度（ML1 + 4,100℃）的比（Tcp / ML1 + 4,100℃）为0.9〜2.3; （C）应力松弛时间（T80）为10.0〜40.0秒，这是在ML1 + 4,100℃测量结束时的转矩为100％时扭矩减弱80％的时间; （D）分子量分布（Mw / Mn）为2.50〜4.00。