Method of preventing polymer scale deposition

Details Method of preventing polymer scale deposition Method of preventing polymer scale deposition

B - Operations, Transporting

01

J

B01J 19/02 (2006.01) C08F 2/00 (2006.01) C23C 28/00 (2006.01)

Patent

CA 2043042

ABSTRACT OF DISCLOSURE A method of preventing polymer scale deposition in a polymerization vessel in polymerization of a particular monomer having an ethylenic double bond having a high dis- solving power against the conventional scale preventive coatings, wherein said polymerization is carried out in a polymerization vessel of which the inner wall has been previously coated with a first coating solution compris- ing: (A) a water-soluble anionic dye, and (B) at least one member selected from the group consisting of inorganic colloids and cationic dyes, to form a first coating, and the first coating thus formed has been then coated with a second coating solution com- prising: (C) an alkaline earth metal compound, and at least one member selected from the group consisting of: (D) a water-soluble anionic dye and (E) an inorganic colloid, to form a second coating. The polymerization vessel hav- ing the double coating as prepared above is also dis- closed. Polymer scale deposition can be effectively pre- vented.

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