AQUEOUS SYNTHETIC-RESIN EMULSION FOR CEMENT MORTAR ADMIXTURE, RE-EMULSIFIABLE POWDER FOR CEMENT MORTAR ADMIXTURE FROM AQUEOUS SYNTHETIC-RESIN EMULSION, AND CEMENT MORTAR ADMIXTURE COMPRISING THE SAME

摘要

An aqueous synthetic resin emulsion is provided which, when being used for a cement mortar admixture, ensures that the resulting mortar is excellent in fluidity and workability and has little variation in properties and an improved adhesive strength. The aqueous synthetic resin emulsion for the cement mortar admixture comprises a synthetic resin comprising a copolymer of at least one monomer (A) selected from an acrylic monomer and a styrene monomer, and at least one functional group-containing monomer (B) selected from the group consisting of (B1) a glycidyl-containing monomer, (B2) an allyl-containing monomer, (B3) a hydrolyzable silyl-containing monomer, (B4) an acetoacetyl-containing monomer, (B5) a monomer having at least two vinyl groups in a molecular structure thereof, and (B6) a hydroxyl-containing monomer, the synthetic resin being stably dispersed in the emulsion in the presence of a polyvinyl alcohol resin [I] having an average saponification degree of not less than 85 mol% and an average polymerization degree of 50 to 3000 and having 1 to 15 mol% 1, 2-diol bonds on its side chains.