Process for producing homo- or copolymerization of vinyl or viny

Details Process for producing homo- or copolymerization of vinyl or viny Process for producing homo- or copolymerization of vinyl or viny

1977-04-29

1978-02-28

Lilling, Herbert J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 18PF, 260 23EM, 526 75, 526 88, 526212, 526344, C08F 200, C08F 1406, C08L 9100

Patent

active

040769208

ABSTRACT:
There is disclosed a process for 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.degree. C., in the presence of an emulsifier 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 greater than 1.0 and wherein the reaction ingredients are thoroughly mixed, and preferably homogenized, prior to polymerization. The process 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.

REFERENCES:
patent: 2674585 (1954-04-01), Condo et al.
patent: 2957858 (1960-10-01), O'Donnell
patent: 3793274 (1974-02-01), Hiyama et al.

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