Catalyst system and process for polymerization of conjugatged di

Details Catalyst system and process for polymerization of conjugatged di Catalyst system and process for polymerization of conjugatged di

1978-04-26

1979-04-10

Hamrock, William F.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252428, 252430, 252431R, 252431C, 252431L, 252431N, C08F 408, C08F 452, C08F 3604, C08F 3606

Patent

active

041489845

ABSTRACT:
The catalyst system disclosed herein comprises one suitable for the polymerization of a conjugated diene, which system comprises a trihydrocarbyl aluminum compound, in which the hydrocarbyl group is an alkyl, aryl or cycloalkyl radical of 1-10 carbon atoms, and an alkali metal compound of the formula M--Y--R wherein M represents Li, Na or K; Y represents O, S or NR.sup.1 ; R represents H or a hydrocarbyl group of 1-10 carbon atoms; R.sup.1 represents a hydrocarbyl group of 1-10 carbon atoms, an acyl group of 1-10 carbon atoms; and when Y is NR.sup.1 the R and R.sup.1 can represent divalent groups so that together they form, with the N, a cyclic radical such as piperdyl, morpholino or diethylene diamino. Lithium alkoxides are preferred forms of the MYR formula and Al(CH.sub.3).sub.3 and Al(C.sub.2 H.sub.5).sub.3 are preferred aluminum components.

REFERENCES:
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patent: 3285894 (1966-11-01), Lim et al.
patent: 3380979 (1968-04-01), Chiang
patent: 3429861 (1969-02-01), Chiang et al.
patent: 3448092 (1969-06-01), Chiang
patent: 3526604 (1970-09-01), Wadsworth
patent: 3631006 (1971-12-01), Hawkins
patent: 3852309 (1974-12-01), Simmons et al.
patent: 3894075 (1975-07-01), Schoen

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