Polymer scale preventive agent

Details Polymer scale preventive agent Polymer scale preventive agent

1994-03-04

1995-02-28

Zitomer, Fred

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

Polymerization reactors for addition polymer preparation

526 62, 526918, 528228, 528229, 528422, C08G 1200, C08F 200, C08F 218, C08F 222

Patent

active

053938577

ABSTRACT:
A polymer scale preventive agent for use in polymerization of a monomer having an ethylenically unsaturated double bond, comprising a condensation product of (A) hydrazine and (B) a quinone compound. Where the monomer is polymerized in a polymerization vessel having, on its inner wall surface, a coating comprising the condensation product, deposition of polymer scale can be effectively prevented not only on the liquid phase part in the polymerization vessel but also near the interface between the gas phase part and the liquid phase part, so that the thus obtained polymer can provide a molded item having few fish eyes and low in initial coloration, when the polymer is molded into a sheet or the like.

REFERENCES:
patent: 4105839 (1978-08-01), Koyanagi

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