Method for charging stabilizer for suspension polymerization of

Details Method for charging stabilizer for suspension polymerization of Method for charging stabilizer for suspension polymerization of

1989-02-24

1990-03-20

Henderson, Christopher

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263442, C08F 220

Patent

active

049102737

ABSTRACT:
A method of charging a suspension stabilizer for suspension polymerization in an aqueous medium of a vinyl monomer comprising vinyl chloride, the suspension stabilizer comprising a partially saponified polyvinyl alcohol having an average polymerization degree of 200 to 600 and a saponification degree of 20 to 60 mole %, wherein the partially saponified polyvinyl alcohol is charged in the form of an aqueous suspension. The method makes it possible to charge a suspension stabilizer which is slightly soluble in water easily and efficiently without using organic solvents, thereby enhancing the quality of the vinyl chloride polymer obtained.

REFERENCES:
patent: 4324878 (1982-04-01), Biaggi
patent: 4345056 (1982-08-01), Thyret

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