Polymer scale deposition preventive agent

Details Polymer scale deposition preventive agent Polymer scale deposition preventive agent

1994-07-21

1995-08-15

Zitomer, Fred

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 4, 526 62, 526 74, 526918, 528229, 528492, C08K 529, C08G 1200

Patent

active

054420024

ABSTRACT:
A polymer scale deposition 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) a diphenyl compound having at least two amino groups and (B) a quinone compound. When the aforementioned monomer is polymerized in a polymerization vessel having a coating formed by applying the aforementioned preventive agent to inner wall surfaces followed by drying, polymer scale can be effectively prevented from being deposited not only on the areas located in the liquid-phase region but also on the areas around the interface between the gas and liquid phases in the polymerization vessel. When an obtained polymer is formed into a sheet or the like, it is possible to obtain a formed product having few fish eyes and good initial coloration.

REFERENCES:
patent: 4758639 (1988-07-01), Koyanagi
patent: 4831107 (1989-05-01), Erhan
patent: 4882413 (1989-11-01), Erhan
patent: 4981946 (1991-01-01), Erhan
Dr. Alexander von Funer, European Search Report 94111504.0-; Nov. 11, 1994.

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