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 which, when used as a cement mortar admixture, imparts satisfactory flowability and workability, is reduced in material property fluctuation, and attains improvements in bonding strength, etc. The aqueous synthetic-resin emulsion for use as a cement mortar admixture contains a synthetic resin dispersed and stabilized with a polyvinyl alcohol resin [I] having an average degree of saponification of 85 mol% or higher and an average degree of polymerization of 50-3,000 and having 1-15 mol% 1,2-diol bonds in side chains, the synthetic resin being one obtained from comonomer ingredients comprising (A) at least one monomer selected among acrylic monomers and styrene monomers and (B) at least one functional monomer selected from the group consisting of (i) monomers containing a glycidyl group, (ii) monomers containing an allyl group, (iii) monomers containing a hydrolyzable silyl group, (iv) monomers containing an acetoacetyl group, (v) monomers having two or more vinyl groups in the molecular structure, and (vi) monomers containing a hydroxy group.