Process for polymerizing conjugated dienes

Details Process for polymerizing conjugated dienes Process for polymerizing conjugated dienes

1976-02-11

1977-10-04

Holler, Alan

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526339, C08F 464, C08F23604, C08F23606, C08F23608

Patent

active

040525457

ABSTRACT:
Conjugated dienes and alpha-olefins, such as butadiene and propylene, are copolymerized by a new catalyst system which gives copolymers containing a high proportion of the alpha-olefin with accompanying desired properties. This catalyst system comprises: (1) A titanium or vanadium halide, preferably chloride, (2) an aluminum hydrocarbon compound which also has Cl, Br or H attached to the Al atom and preferably the hydrocarbon group or groups are alkyl groups which have 1-8 carbon atoms in each of said alkyl groups and (3) CS.sub.2. The copolymers produced by this process have molecular weights in the range of 100,000-5,000,000; referably 250,000-500,000, and other desirable properties.

REFERENCES:
patent: 3317494 (1967-05-01), Farson
patent: 3470144 (1969-09-01), Minekawa et al.
patent: 3590024 (1971-06-01), Ishizuka et al.
patent: 3766153 (1973-10-01), Kawasaki et al.
patent: 3803106 (1974-04-01), Hayashi et al.
patent: 3914207 (1975-10-01), Kang
patent: 3948869 (1976-04-01), Halasa et al.

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