C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/397, 23/431,
C08F 14/06 (2006.01) C08F 2/20 (2006.01)
Patent
CA 1261542
ABSTRACT OF THE DISCLOSURE 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, ac- cording 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 crosslink- ing monomer such as di(meth)allyl ether of diethyleneglycol and (b) a non-ionic surface active agent in combination.
485267
Itoh Kenichi
Noguki Genji
Ohba Hitoshi
Tanaka Motoaki
Gowling Lafleur Henderson Llp
Shin-Etsu Chemical Co. Ltd.
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