C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/397, 402/538
C08F 14/04 (2006.01) C08F 2/24 (2006.01) C08F 14/06 (2006.01) C08K 5/04 (2006.01)
Patent
CA 1065540
ABSTRACT OF THE DISCLOSURE There is disclosed a process preparing vinyl dispersion resins by conducting the polymerization reaction of the vinyl monomer or monomers in an aqueous alkaline medium, using an oil-soluble polymerization initiator, at temperatures preferably below about 48°C., i? the presence of an emulsi- fier system comprising the ammonium salt of a high fatty acid containing from 8 to 20 carbon atoms and at least one long chain alcohol containing from 14 to 24 carbon atoms wherein the ratio of alcohol to emulsifier is equal to or grater than 1.0 and wherein the reaction ingredients are thoroughly mixed, and preferably homogenized, prior to polymerization. The pro- cess produces paste resins having improved heat stability and flow properties and capable of producing films having high clarity and improved water resistance. More importantly, polymer build-up in the reactor is substantially reduced and multiple polymerizations can be run in the reactor without opening the same.
254636
Doyle Thomas J.
Mikofalvy Bela K.
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