Binders for paints

US4267091A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans J. Geelhaar · Bischofswerda, DE
• Erich Penzel · Heidelberg, DE
• Gregor Ley · Wattenheim, DE

Key dates

• Filing date: Apr 17, 1979
• Grant date: May 12, 1981
• Expiry date: Apr 17, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Binders which comprise (A) an aqueous emulsion of a copolymer A, having a glass transition temperature of 0-50.degree. C., of monoolefinically unsaturated carboxylic acid esters, with or without styrene, vinyl acetate, vinyl chloride and acrylonitrile, which copolymer contains, as copolymerized units, small amounts of monoolefinically unsaturated monocarboxylic acids and/or dicarboxylic acids and/or their amides (of which the nitrogen atoms may or may not be alkyl-substituted and/or alkylol-substituted) and small amounts of monomers containing carbonyl groups, (B) from 0.05 to 1 mole, per mole of carbonyl groups present in the copolymer A, of a water-soluble aliphatic dihydrazine compound and (C) from 0 to 0.02 mole, per mole of dihydrazine compound, of a water-soluble zinc, manganese, cobalt and/or lead salt, or particularly suitable for use in paints and pebble dash renderings, since they give films which adhere particularly well to alkyd resin primers and which show particularly little tendency to whitening.