Direct method for preparing syndiotactic 1,2- polybutadiene

Details Direct method for preparing syndiotactic 1,2- polybutadiene Direct method for preparing syndiotactic 1,2- polybutadiene

C - Chemistry, Metallurgy

08

F

402/444

C08F 136/06 (2006.01) C08F 4/70 (2006.01)

Patent

CA 1297231

Abstract of the Disclosure DIRECT METHOD FOR PREPARING SYNDIOTACTIC 1,2-POLYBUTADIENE Short fibers of syndiotactic 1,2-polybutadiene are utilized in making tires that have improved resistance against heat build-up and improved wear characteristics. The preparation of syndiotactic 1,2-polybutadiene in fibrous form has traditionally involved an extrusion and stretching step. However, the technique of the present invention circumvents the necessity of hot mill flexing andJor extrusion in making fibrous syndiotactic 1,2-polybutadiene. The present invention more specificallv involves a process for preparing syndiotactic 1,2-polybutadiene fibers directly comprising polymerizing 1,3-butadiene monomer in the presence of (1) a catalyst composition which is comprised of (a) a cobalt compound and (b) an organoaluminum compound; (2) carbon disulfide; and (3) at least one member selected from the group consisting of liquid polymers and naphthenic oils.

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