Coating compositions and process for the preparation of a multicoat protective and/or decorative coating on a substrate surface

US5169922A · kind A · utility

Assignee

• Basf Lacke & Farben Aktiengesellschaft · DE

Inventors

• Hans-Dieter Hille · Bensberg, DE
• Arnold Dobbelstein · Cologne, DE
• Horst Grosch · Veitshöchheim, DE

Key dates

• Filing date: Apr 4, 1990
• Grant date: Dec 8, 1992
• Expiry date: Apr 4, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/3821
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to coating compositions which are particularly suitable for the preparation of the basecoat for two-coat coatings of the basecoat/clearcoat type, and which comprise organic diluents, at least one resin containing urethane and urea groups, and, where appropriate, other resins, pigments and other conventional additives in common use. The coating compositions according to the invention are those which comprise at least one resin containing urethane and urea groups, which resin is obtainable by reacting PA0 a1) a compound having two hydroxyl groups reactive toward isocyanate groups, with PA0 a2) an aliphatic and/or cycloaliphatic di-isocyanate to form a prepolymer (A) containing isocyanate groups, and by subsequently reacting the isocyanate groups of the prepolymer (A), at least in part, with PA0 a3) an adduct produced from a (meth)acrylic ester, preferably an acrylic ester, and an aliphatic or cycloaliphatic compound containing at least two aminic hydrogen atoms, the adduct containing at least one active aminic hydrogen atom.