| abstract |
PURPOSE: To obtain the title powder excellent in redispersibility, film properties, etc., by emulsion-(co)polymerizing an acrylic monomer in the presence of a specific protective colloid based on polyvinyl alcohol having a low degree of polymn. and spray-drying the resulting emulsion. n CONSTITUTION: An acrylic monomer (e.g. methyl methacrylate) is emulsion- polymerized, if necessary with 10wt.% or lower copolymerizable monomer (e.g. styrene), in the presence of a protective colloid based on polyvinyl alcohol having an average degree of polymn. of 500 or lower to give an acrylic resin emulsion, which is spray-dried, giving the title powder. Compounding an anticaking agent (e.g. hydrated silica) into the powder improves its storage stability, and the powder is useful for an adhesive, a coating binder, a cement additive, etc. n COPYRIGHT: (C)1992,JPO&Japio |