Method for manufacturing of butadiene-propylene copolymers

Details Method for manufacturing of butadiene-propylene copolymers Method for manufacturing of butadiene-propylene copolymers

1974-06-12

1976-02-24

Holler, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C08F 206, C08F 452, C08F 3606

Patent

active

039403785

ABSTRACT:
A method for manufacturing a high molecular weight, elastic and random type butadiene-propylene copolymer whose propylene content is in the range of 3 to 45 mol%, which comprises copolymerizing butadiene and propylene in the molar ratio ranging from 1/10 to 10/1 at a temperature in the range of 0.degree. to 80.degree.C in the presence of a catalyst system consisting of (1) at least one compound selected from the group consisting of titanium tetrachloride, titanium tetrabromide and vanadyl trichloride, (2) an organoaluminum compound having the general formula, ALR.sup.1 R.sup.2 R.sup.3 wherein R.sup.1, R.sup.2 and R.sup.3 represent a hydrocarbon radical and (3) phosgene, in which said components (2) and (3) are mixed at room temperature prior to the addition of other catalyst components and of monomers. The resulting random butadiene-propylene copolymer is highly elastic and superior to cis-1,4-polybutadiene in resistance to thermal aging.

REFERENCES:
patent: 3714133 (1973-01-01), Kawasaki et al.
patent: 3766153 (1973-10-01), Kawasaki et al.
patent: 3803106 (1974-04-01), Hayashi et al.

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