Polymer scale preventive agent, polymerization vessel effective in preventing polymer scale deposition, and process of producing polymer using said vessel
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsToshihide Shimizu, Mikio Watanabe
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Abstract
A polymer scale preventive agent for use in polymerization of a monomer having an ethylenically unsaturated double bond, comprising a condensation product of: (A) an aromatic amine compound, and (B) an aromatic hydroxyl compound condensate. This agent is used for forming a coating on the inner wall, etc. of a polymerization vessel. Such a vessel is effective in preventing polymer scale deposition and useful in producing a polymer that shows very few fish eyes and good whiteness when formed into sheets or the like.
Claims9
A polymer scale preventive agent for use in polymerization of a monomer having an ethylenically unsaturated double-bond, comprising a condensation product of:
- (A) an aromatic amine compound, and
- (B) a condensation product of an aromatic hydroxyl compound with a compound selected from the group consisting of said aromatic hydroxyl compound, acetone, aldehydes and aromatic amine compounds, wherein said condensation product of components (A) and (B) is dissolved or dispersed in a solvent to form a liquid state:
- and
- one or both of:
- (D) a water-soluble polymeric compound:
- and
- (E) at least one compound selected from the group consisting of a colloidal silica and an alkali metal silicate.
The polymer scale preventive agent according to claim 11, wherein the component (D) is present in an amount of 0.01 to 10 parts by weight and the component (E) is present in an amount of 0.01 to 20 parts by weight per part by weight of the condensation product of the components (A) and (B).
Dependencies are inferred from the claim text.