Anticorrosive paint composition.

摘要

An anticorrosive paint composition comprising 100 parts by weight, calculated as solids material, of a vinylidene chloride copolymer latex and from 0.1 to 10 parts by weight of a chelating agent; the vinylidene chloride copolymer latex being obtained by subjecting 100 parts by weight of a monomeric mixture comprising from 50 to 95 % by weight of vinylidene chloride and from 5 to 50 % by weight of a monomer which is copolymerizable therewith to emulsion polymerization in the presence of a polymerization initiator and from 0.5 to 2.0 parts by weight of a nonionic emulsifier; wherein a preliminary emulsion polymerization is carried out with less than 20 % by weight of the total weight of the monomeric mixture, not more than 25 % by weight of the nonionic emulsifier and a proportion of the polymerization initiator, and the remaining monomeric mixture, nonionic emulsifier and polymerization initiator are subsequently continuously and uniformly added to the polymerization system to carry out emulsion polymerization of the monomeric mixture; the vinylidene chloride copolymer latex containing the nonionic emulsifier in a form which is not extractable by the methanol extraction method (as herein defined) in an amount of at least 50 % by weight of the total amount of the nonionic emulsifier used in the polymerization and in an amount of at least 0.25 % by weight of the solids content of the vinylidene chloride copolymer latex.