Stabilizer or dispersing agent for use in a suspension polymeriz

Details Stabilizer or dispersing agent for use in a suspension polymeriz Stabilizer or dispersing agent for use in a suspension polymeriz

1980-10-10

1983-06-14

Levin, Stanford M.

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

Synthetic resins

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

524297, 524306, 524322, 525 56, 525 57, 525 58, 525 61, 526193, 526200, 526202, 5263442, C08F 812, C08F 836, C08F 840, C08F 846

Patent

active

043884423

ABSTRACT:
A stabilizer or dispersing agent for use in a suspension polymerization of a vinyl compound is provided which comprises a modified and partially hydrolyzed polyvinyl alcohol having an average polymerization degree of from 200 to 3,000 and an average hydrolysis degree of from 60 to 90 mol % and including anion hydrophilic groups at the side chains thereof, wherein said anion hydrophilic groups are selected from the group consisting of dicarboxyl groups and/or esters thereof and/or salts thereof, sulfuric esters and/or salts thereof and phosphoric esters and/or salts thereof, and the content of said anion hydrophilic groups is in the range of from 0.02 to 10 mol % per unit mol of the polyvinyl alcohol. A process for preparing a polymer of a vinyl compound is also provided wherein said vinyl compound is polymerized in a suspension thereof suspended by the use of the stabilizer or dispersing agent.

REFERENCES:
patent: 3702844 (1972-11-01), Ofstead et al.
patent: 3925290 (1975-12-01), Matsuo et al.

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