Binders for aqueous primers for wood paints

US4636548A · kind A · utility

Assignee

• BASF SE

Inventors

• Heribert Kossmann · Ludwigshafen, DE
• Lothar Matthaei · Bad Dürkheim, DE
• Gregor Ley · Wattenheim, DE
• Eckehardt Wistuba · Bad Dürkheim, DE
• Savas Wulgaris · Ludwigshafen, DE

Key dates

• Filing date: Jan 21, 1986
• Grant date: Jan 13, 1987
• Expiry date: Jan 21, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D157/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Binders for aqueous primers for wood paints contain PA1 (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.degree. to 50.degree. C., the said dispersion being stable to polyvalent ions, and PA1 (B) from 5 to 50% 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 PA2 (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 PA2 (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.