Process for producing butadiene polymers

Details Process for producing butadiene polymers Process for producing butadiene polymers

C - Chemistry, Metallurgy

08

F

402/444

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

Patent

CA 1040347

PROCESS FOR PRODUCING BUTADIENE POLYMERS ABSTRACT OF THE DISCLOSURE A butadiene polymer consisting essentially of syndiotactic 1,2-polybutadiene is produced by the successive steps of: (A) preparing a catalyst component solution by dissolving, in an inert organic solvent containing 1,3- butadiene, a cobalt compound, soluble in the organic solvent, such as (i) cobalt-.beta.-diketone complex, (ii) cobalt-.beta.-keto- acid ester complex, (iii) cobalt salt of organic carboxylic acid and (iv) halogenated cobalt-ligand compound complex, and on organoaluminum compound, (B) preparing a catalyst composition by mixing the catalyst component solution with an alcohol, ketone or aldehyde compound and carbon disulfide; (C) providing a polymerization mixture containing desired amounts of 1,3-butadiene, the catalyst composition and an insert organic solvent, and (D) polymerizing 1,3-butadiene at a temperature of -20°C to 80°C. - 1 -

209638

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