Aqueous binder dispersions for the preparation of paints & finishes

US4840990A · kind A · utility

Assignee

• BASF SE

Inventors

• Erich Gullbins · Heidelberg, DE
• Graham E. McKee · Ludwigshafen, DE
• Gregor Ley · Wattenheim, DE

Key dates

• Filing date: Sep 26, 1988
• Grant date: Jun 20, 1989
• Expiry date: Sep 26, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L61/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to aqueous binder dispersions for the preparation of, inter alia, paints and finishes, substantially containing PA1 (A) from 0.5 to 50% by weight of a phenolic resin precondensate, PA1 (B) from 20 to 70% by weight of a copolymer of predominant proportions of alkyl acrylates and/or methacrylates, minor proportions of comonomers with groups capable of crosslinking and other comonomers, the copolymer being in the form of a dispersion and being crosslinkable by a condensation reaction, and PA1 (C) from 10 to 70% by weight of a graft elastomer comprising a diene polymer as the base polymer and a copolymer of, substantially, styrene, acrylonitrile and C.sub.1 -C.sub.6 -alkyl acrylates and/or methacrylates, as the graft polymer, the graft elastomer being in the form of a dispersion, the percentages being based on the solids content of the total amount of (A), (B) and (C).