Polymerization of unsaturated hydrocarbons with an induction per

Details Polymerization of unsaturated hydrocarbons with an induction per Polymerization of unsaturated hydrocarbons with an induction per

1987-08-21

1989-08-29

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502103, 526142, 526283, 2643286, C08F 478, C08F 3208

Patent

active

048618489

ABSTRACT:
Process of polymerization of unsaturated hydrocarbons, with an initial induction period, by means of a catalyst constituted by a halogeno-phenate of tungsten, of which the phenate group carries one or more substituents, in the presence of an organometallic co-catalyst; the halogeno-phenate is chosen from amongst those represented by the formula ##STR1## where X is a halogen, especially Cl or Br, n is a whole number 2, 3 or 4, R.sup.1 is H or a C.sub.1 to C.sub.8 straight- or branched-chain alkoxy group, R.sup.2 is H or a C.sub.3 to C.sub.9 branched-chain alkyl group, R.sup.1 and R.sup.2 never being hydrogen simultaneously.

REFERENCES:
patent: 3849509 (1974-11-01), Streck et al.
patent: 4400340 (1983-08-01), Klosiewicg
patent: 4550216 (1985-10-01), Basset et al.
Boor, Ziegler-Notta Catalysts and Polymerizations, Academic Press (N.Y.) pp. 603-604 (1979).
Dodd et al., Journal of Molecular Catalysis, 15 (1982) 103-110.

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