| 摘要 |
PURPOSE:To obtain a compd. which does not allow undissolved lumps to occur when dissolved, is excellent in flowability, workability, and solubility, and hardly causes dusting by homogeneously mixing a specific granular water-sol. high- molecular compd. with a specific silica and thereby coating the compd. with the silica. CONSTITUTION:A granular water-sol. high-molecular compd. having a water content of 3-15% and a granule size of 2.0mm or lower (e.g. a copolymer of a quaternary salt of dimethylaminoethyl acrylate-methyl chloride with acrylamide) is homogeneously mixed with 0.1-5.0wt.% hydrophilic silica having a mean primary particle size of 5-50nm (e.g. Aerosil 300, a product of Nippon Aerosil) and thereby coated with the silica. |
