Process for polymerization in vessel with coating of polymer scale preventive agent
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsToshihide Shimizu, Mikio Watanabe
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Abstract
A process for producing a polymer of a monomer having an ethylenically unsaturated double bond is described, wherein the monomer is polymerized in a polymerization vessel having a coating on its inner wall surfaces of a specific three-component polymer scale preventive agent, these three components are a naphthoquinone dimer, a water soluble polymer, and an inorganic colloid, whereby polymer scale is prevented from being deposited on the inner wall surfaces of the polymerization vessel.
Claims8
A process for producing a polymer of a monomer having an ethylenically unsaturated double bond, which comprises polymerizing the monomer in a polymerization vessel having a coating on its inner wall surfaces, whereby polymer scale is prevented from being deposited, wherein said coating comprises:
- (A) a naphthoquinone dimer compound selected from the group consisting of 1,1',4,4'-tetraone, 1',4'-dihydroxy-1,4-dione, 3,3',4,4'-tetraone, 3'-hydroxy-1',3,4,4'-tetraone and 3-hydroxy-1,1',4,4'-tetraone;
- (B) a water-soluble polymeric compound;
- and
- (C) an inorganic colloid.
Dependencies are inferred from the claim text.