Method for producing vinyl chloride polymers

Details Method for producing vinyl chloride polymers Method for producing vinyl chloride polymers

1979-04-12

1981-03-24

Kight, III, John

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526263, 526322, 526323, 526326, 526327, 5263294, 526334, 5263442, 526345, C08F 1406

Patent

active

042581656

ABSTRACT:
A method for producing a vinyl chloride resin comprising 10 to 80% by weight of tetrahydrofuran-insoluble vinyl chloride resin gel fraction and the balance of tetrahydrofuran-soluble fraction with an average polymerization degree of 1,000 or more, characterized in that vinyl chloride alone or a mixture of a major amount of vinyl chloride and a minor amount of at least one monomer copolymerizable therewith is polymerized at a temperature of 0.degree. to 50.degree. C. in the presence of at least one polyfunctional monomer having two or more ethylenic double bonds in the molecule until the whole monomer or monomers in the polymerization system are substantially polymerized. The thus obtained vinyl chloride resin is excellent in processability and capable of forming a molded article having a small compression permanent set.

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patent: 4072806 (1978-02-01), Ravey et al.
Journal of Polymer Sci.: Part C, Polymerization of Vinyl Chloride in the Presence of X-Lagents, Itoh et al., No. 33, pp. 135-145 (1971).

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