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.
本发明公开了一种合成
树脂乳液粉末,它是通过干燥由乳液(A)和聚
乙烯醇(B)组成的组合物而获得的,乳液(A)中的分散体是一种聚合物,其不饱和单体单元选自
乙烯基不饱和单体和二烯基单体,而聚
乙烯醇(B)分子中
乙烯单元的含量为 1 至 12 摩尔%。
乳胶粉具有良好的再分散性和耐
水性。其再分散性可形成良好的薄膜,在低温下具有良好的储存稳定性。乳液粉末可用作液压物质的添加剂,因为它能很好地分散在
水泥砂浆等液压物质中,硬化后的物品具有很高的机械强度。
乳胶粉还可用作液压物质的接合材料,因为它的粘合性和耐久性都很好,而且可提供机械强度很高的接合物品。