Method for the polymerization of vinyl chloride monomer in an aq

Details Method for the polymerization of vinyl chloride monomer in an aq Method for the polymerization of vinyl chloride monomer in an aq

1985-06-25

1987-09-15

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526201, 526203, 5263442, 526345, 525246, 525301, C08L 3700

Patent

active

046940537

ABSTRACT:
The invention provides an improvement in the suspension polymerization of vinyl chloride in an aqueous medium in the presence of a monomer-soluble polymerization initiator, according to which the amount of polymer scale deposition on the reactor walls can be greatly decreased. The improvement comprises admixing the aqueous polymerization medium with (a) a water-soluble crosslinked copolymer of an unsaturated carboxylic acid monomer, e.g. acrylic acid, and a crosslinking monomer such as di(methyl)allyl ether of diethyleneglycol and (b) a non-ionic surface active agent in combination.

REFERENCES:
patent: 2772258 (1956-11-01), Mangelli
patent: 2886552 (1959-05-01), Helligmann et al.
patent: 3488328 (1970-01-01), Koyanagi et al.
patent: 3907730 (1975-09-01), Jones
patent: 3966696 (1976-06-01), Kidoh et al.
patent: 4228264 (1980-10-01), Yamamoto et al.
patent: 4360651 (1982-11-01), Dinbergs
patent: 4377672 (1983-03-01), Geschonke et al.

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