| 摘要 |
<p>Binders for aqueous primers for wood paints contain (A) from 50 to 95 % by weight, based on the weight of the primer, of an aqueous dispersion of a vinyl polymer having a particle size of from 0.03 to 0.5 .mu.m and a minimum film-forming temperature of from 0 to 50.degree.C, the said dispersion being stable to polyvalent ions, and (B) from 5 to 50 X by weight, based on the weight of the primer, of a water-soluble polymeric zinc amine complex of a copolymer which has a K value of from 8 to 40 and consists of (a) from 20 to 60 % by weight, based on the weight of the copolymer, of an .alpha.,.beta.-monoethylenically unsaturated mono- and/or dicarboxylic acid of 3 to 5 carbon atoms and (b) from 40 to 80 % by weight, based on the weight of the copolymer, of styrene and/or one or more alkyl (meth)acrylates, where alkyl is of 1 to 8 carbon atoms, the copolymer being reacted with from 2 to 6 moles, based on the carboxyl groups of the copolymer, of ammonia and from 0.8 to 1.2 equivalents of a zinc compound per carboxyl group of the copolymer.</p> |
