Process for copolymerizing conjugated diene and alpha-olefin

Details Process for copolymerizing conjugated diene and alpha-olefin Process for copolymerizing conjugated diene and alpha-olefin

1977-02-17

1977-09-27

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526142, 526143, 526339, C08F23602

Patent

active

040513092

ABSTRACT:
Conjugated dienes and alpha-olefins, such as butadiene and propylene, are copolymerized by a catalyst system comprising a metal component TiCl.sub.n Br.sub.4-n or VCl.sub.m Br.sub.5-m, a reducing agent of the formula AlR.sub.2 H wherein R is hydrogen or a hydrocarbon group, there being at least one hydrocarbon group per molecule, and a carbonyl-containing compound such as acetophenone. The use of the aluminum hydride compound allows the use of higher and more practical temperatures to obtain desirable molecular weights, yields and microstructure that with aluminum trialkyls require much lower and less practical polymerization temperatures.

REFERENCES:
patent: 3380981 (1968-04-01), Miller
patent: 3506632 (1970-04-01), Henderson
patent: 3663450 (1972-05-01), Cozewith
patent: 3838137 (1974-09-01), Tang
patent: 3919180 (1975-11-01), Furukawa
patent: 3953410 (1976-04-01), Imai

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