Patent ID: 6291600
Filing Date: 2001-09-18
Classification: C08F

Abstract:
A method of preventing scale from adhering to the inner wall surfaces of a polymerization tank and the like used in the polymerization of vinyl chloride monomers, comprising:preparing an aqueous coating fluid which is an aqueous alkali solution containing a modified phenolic resin in an amount of 0.1 to 10.0 wt. % and having a pH adjusted with an acid to a pH of 0.2 to 4.0 higher than the pH at which the modified phenolic resin deposits at ambient temperature; andapplying the coating fluid to the surfaces wherein the temperature of the surfaces is 40.degree. C. or over and wherein the modified phenolic resin is deposited from the aqueous coating fluid and adhered to the surfaces.applying the coating fluid to the surfaces wherein the temperature of the surfaces is 40.degree. C. or over and wherein the modified phenolic resin is deposited from the aqueous coating fluid and adhered to the surfaces.