公开(公告)号：US3935180A

公开(公告)日：1976-01-27

申请号：US393290

申请日：1973-08-31

申请人： Shotaro Sugiura ,  Tetsuro Matsuura ,  Haruo Ueno ,  Minoru Kono ,  Hideo Ishikawa ,  Thunehiko Tokutomi

发明人： Shotaro Sugiura ,  Tetsuro Matsuura ,  Haruo Ueno ,  Minoru Kono ,  Hideo Ishikawa ,  Thunehiko Tokutomi

IPC分类号： C08F136/06 ,  C08D3/08 ,  C08D1/14

CPC分类号： C08F136/06

摘要： A process for producing a polybutadiene is provided wherein, first, 1,3-butadiene is polymerized in the presence of a particular cis-1,4-polymerization catalyst and subsequently, the polymerization is continued in the presence of a particular 1,2-polymerization catalyst. The resulting polybutadiene is characterized as containing 2 to 40% of the 1,2-structure, the melting point of the 1,2-structure portion being 110.degree. to 215.degree.C, and containing 60 to 98% of the cis-1,4-structure and having an intrinsic viscosity [.eta.] of 0.9 to 8 in tetraline at 135.degree.C. A vulcanized product of the polybutadiene is characterized as possessing improved tear strength, flex-crack resistance and tensile strength.

摘要翻译： 提供一种生产聚丁二烯的方法，其中首先在特定的顺式-1,4-聚合催化剂存在下聚合1,3-丁二烯，随后在特定的1,2- 聚合催化剂。 所得聚丁二烯的特征在于含有2〜40％的1,2-结构，1,2-结构部分的熔点为110〜215℃，含有60〜98％的顺式-1， 4-结构，在135℃下在四氢化萘中的特性粘度η为0.9-8。聚丁二烯的硫化产物的特征在于具有改善的撕裂强度，抗弯曲性和拉伸强度。