Suspending agent for suspension polymerization of vinyl compound

Details Suspending agent for suspension polymerization of vinyl compound Suspending agent for suspension polymerization of vinyl compound

1995-09-15

1997-05-13

Reddick, Judy M.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 61, C08G 6348

Patent

active

056293780

ABSTRACT:
The present invention is to provide a suspending agent for suspension polymerization of a vinyl compound which comprises a polyvinyl alcohol polymer (A) having a degree of hydrolysis of at least 60 mol % and a mercapto group at an end thereof; and furthermore a suspending agent for suspension polymerization of a vinyl compound which comprises a polyvinyl alcohol polymer (A) having a degree of hydrolysis of at least 60 mol % and a mercapto group at an end thereof and a polyvinyl ester polymer (B) having a degree of hydrosis of less than 60 mol %, weight ratio of component (A)/component (B) being 40/60 to 95/5.
The suspending agent for suspension polymerization of a vinyl compound of the present invention has an excellent less-foaming effect and an effect of giving uniform and porous vinyl polymer granules.

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patent: 4931518 (1990-06-01), Sharaby
patent: 5308911 (1994-05-01), Takada et al.
patent: 5349008 (1994-09-01), Takada et al.
patent: 5360860 (1994-11-01), Itoh et al.
The Poval Book. Polymer Press, 1984.
Polyvinyl Alcohol-Development. C.A. Finch, Wiley, 1992.

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