Polymer scale preventive process

Details Polymer scale preventive process Polymer scale preventive process

1994-01-13

1996-01-16

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...

526 74, C08F 200

Patent

active

054848555

ABSTRACT:
A polymer scale preventive process for use in polymerization of a monomer having an ethylenically unsaturated double bond, comprising an alkaline solution containing (A) a condensation product of (A-1) an aromatic compound having at least two amino groups with (A-2) an aromatic tetracarboxylic acid anhydride, and (B) at least one member selected from the group consisting of (B-1) a water-soluble polymeric compound and (B-2) an inorganic colloid. The scale preventive process is low in virulence or the like, and high in safety. The process is used for forming a coating on inner wall surfaces of a polymerization vessel. Where such a polymerization vessel is used to carry out the polymerization, polymer scale deposition can be effectively prevented, not only on areas in the liquid-phase region but on areas around the gas-liquid interface in the vessel, and the resulting polymeric product shows few fish eyes and good whiteness when formed into sheets or the like.

REFERENCES:
patent: 4081248 (1978-03-01), Cohen
patent: 5115051 (1992-05-01), Shimizu et al.

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