| 摘要 |
PURPOSE:To provide an aq. dispersion compsn. for paints, which has excellent water repellency and stain resistance, by blending wax and colloidal silica with an aq. dispersion of a specified emulsion copolymer. CONSTITUTION:At least 30wt% hydrophobic alpha,beta-monoethylenically unsaturated monomer (A) (e.g. butyl acrylate) with solubility in water at 30 deg.C of 0.3wt% or below, 0-70wt% other alpha,beta-monoethylenically unsaturated monomer (B) (e.g. methyl acrylate) copolymerizable with component A, and 0.1-5wt% alpha,beta-monoethylenically unsaturated carboxylic acid (C) (e.g. acrylic acid) are mixed together and emulsion-copolymerized. 2-40wt% wax having an m.p. of 50-100 deg.C such as paraffin wax and 1-200wt% colloidal silica are blended with the resulting aq. dispersion to obtain the desired aq. dispersion compsn. for paints, each quantity being based on that (on a solid basis) of the dispersion. |
