Process for preventing polymer scale using an alkaline solution

Details Process for preventing polymer scale using an alkaline solution Process for preventing polymer scale using an alkaline solution

1994-07-27

1995-04-04

Henderson, Christopher

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

Synthetic resins

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

526200, 526225, C08F 220, C08F 224

Patent

active

054039037

ABSTRACT:
A polymer scale preventive agent for use in polymerization of a monomer having an ethylenically unsaturated double bond, comprising an alkaline solution containing a condensation product of (A) an aromatic dibasic acid dihydrazide compound, and (B) an aromatic tetracarboxylic acid anhydride. This agent is used for forming a coating on the inner wall, etc. of a polymerization vessel. Such a vessel is effective in preventing polymer scale deposition and useful in producing a polymer that shows very few fish eyes and good whiteness when formed into sheets or the like.

REFERENCES:
patent: 4758639 (1988-07-01), Koyanagi

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