Process for producing syndiotactic 1,2-polybutadiene and...

Details Process for producing syndiotactic 1,2-polybutadiene and... Process for producing syndiotactic 1,2-polybutadiene and...

C - Chemistry, Metallurgy

08

F

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

Patent

CA 2286234

A catalyst composition comprising (a) an iron-containing compound, (b) a cyclic hydrogen phosphite, and (c) an organoaluminum compound is disclosed for polymerizing 1,3-butadiene into syndiotactic 1,2-polybutadiene. The use of the catalyst composition of this disclosure avoids the use of environmentally detrimental components such as carbon disulfide and halogenated solvents. The melting temperature of the syndiotactic 1,2-polybutadiene can be varied from about 125 to about 175 °C by variations in the catalyst components and the component ratios. The ability to vary the melting temperature over such a broad range with a single catalyst composition is very desirable. The syndiotactic 1,2-polybutadiene can be used as a plastic or as an additive for rubber compositions wherein it can crosslink with conventional rubbers using conventional crosslinking agents.

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