Polymer scale preventive agent, polymerization vessel wherein po

Details Polymer scale preventive agent, polymerization vessel wherein po Polymer scale preventive agent, polymerization vessel wherein po

1993-02-22

1994-10-04

Schofer, Joseph L.

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

Synthetic resins

Polymerizing in reactor of specified material, or in reactor...

526208, 422131, C08F 204, C08F 212

Patent

active

053527488

ABSTRACT:
A polymer scale preventive agent used for polymerizing a monomer having an ethylenically unsaturated double bond, comprising an alkaline solution containing (A) an anthraquinone dye and (B) a reducing agent. Where the monomer is polymerized in a polymerization vessel having, on the inner wall surface, a coating film formed by applying and drying said preventive agent, polymer scale can effectively be prevented from being deposited 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, when the polymer is molded into a sheet or the like.

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

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