Polymer scale deposition preventive agent

Details Polymer scale deposition preventive agent Polymer scale deposition preventive agent

1994-12-27

1996-08-20

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...

526271, 5263171, 526328, 526330, 526332, 526335, 526341, 526344, 526346, C08F 200, C08F12206, C08F12006, C08F12010, C08F11804, C08F13604, C08F11612, C08F12044, C08F114106

Patent

active

055480390

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) an anthraquinone compound having at least two amino groups and (B) at least one compound selected from the group consisting of benzoquinone compounds and naphthoquinone compounds. When the 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 low initial coloration.

REFERENCES:
patent: 4795800 (1989-01-01), Yamauchi et al.
patent: 5411675 (1995-05-01), Usuki et al.

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