Procedure for the production of polymers and copolymers of isobu

Details Procedure for the production of polymers and copolymers of isobu Procedure for the production of polymers and copolymers of isobu

1974-09-06

1976-06-22

Holler, Alan

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526188, 526339, C08F 452, C08F21012

Patent

active

039650782

ABSTRACT:
A method is described for the polymerization of isobutylene and, in particular, the copolymerization of isobutylene and isoprene to produce butyl rubber, by contacting the monomers with a catalyst prepared from: (a) an organoaluminum compound (e.g. Al(C.sub.2 H.sub.5).sub.2 Cl) and (b) a compound represented by the formula X'.sub.n M.sub.e Y.sub.m in which X' is a halogen atom; Y is oxygen, sulphur or a functional group selected from the alkoxies, esters, amides, simple or substituted alkyls, cycloalkyls, aromatics, arenes, phosphines, acetylacetones and oximes; Me is an element selected from Ti, Sn, Zn, B, Al, Hg, Pb, W, Sb, Ge, V, Zr, As, Bi and Mo; n and m are whole numbers whose sum equals the valence of Me except where Y is oxygen or sulphur, when the valency equals 2m + n, (e.g. Ti(O nC.sub.4 H.sub.9)Cl.sub.3), in a liquid reaction medium constituted by an aliphatic, aromatic, cycloaliphatic or halogenated hydrocarbon such as methyl chloride, and at a temperature in the range from -100.degree. to 30.degree.C.

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patent: 3493549 (1970-02-01), Uemura et al.
patent: 3631013 (1971-12-01), Horie
patent: 3850896 (1974-11-01), Priola et al.

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