Redispersible synthetic resin powder

摘要

Disclosed is a synthetic resin emulsion powder obtained by drying a composition that comprises an emulsion (A) where the dispersoid is a polymer having one more unsaturated monomer units selected from ethylenic unsaturated monomers and dienic monomers, and a polyvinylalcohol (B) having, in the molecule, from 1 to 12 mol% of ethylene units. The emulsion powder has good redispersibility and good water resistance. Its redispersion forms good films and it has good storage stability at low temperatures. The emulsion powder is useful for additives to hydraulic substances, as it disperses well in hydraulic substances such as cement mortar and gives hardened articles of high mechanical strength. The emulsion powder is also useful for joint materials for hydraulic substances, as its adhesiveness and durability are both good and it gives jointed articles of high mechanical strength.