| abstract |
PURPOSE: To prepare the titled emulsion having excellent pigment dispersibility, initial adhesive power, compatibility with other emulsion, and stability of a mixture with other emulsion, by the emulsion polymerization of the monomers in the presence of a specific amount of a surface active agent and a water-soluble protective colloid. n CONSTITUTION: The titled emulsion is prepared by the emulsion polymerization of ethylene and vinyl acetate in the presence of (A) 0.5W2.5wt%, based on vinyl acetate, of an anionic surface active agent (e.g. sodium laurate), (B) 4W7wt% of a nonionic surface active agent (e.g. polyoxyethylene alkyl ether) and (C) 0.2W 1wt% of a water-soluble protective colloid (pref. polyvinyl alcohol having an average polymerization degree of 400W2,500 and an average saponification degree of 83W97mol%). The ratio of ethylene to vinyl acetate is selected togive a copolymer containing 20W29wt% of ethylene. The emulsion is added to an adhesive or a paint. n EFFECT: The demulsification does not occur even by adding a large amount of pigment or filler to the emulsion. n COPYRIGHT: (C)1981,JPO&Japio |