Coating agent based on a hydroxyl group-containing polyacrylate resin and its use in processes for producing a multicoat paint system

US6001947A · kind A · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Michael Brunnemann · Munster, DE
• Harald Borgholte · Munster, DE
• Peter Hoffmann · Senden, DE
• Olaf Hallmann · Munster, DE
• Bernhard Rubbert · Munster, DE

Key dates

• Filing date: Feb 4, 1998
• Grant date: Dec 14, 1999
• Expiry date: Feb 4, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31551
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a coating composition comprising PA1 (A) at least one hydroxyl-containing polyacrylate resin, PA1 (B) at least one isocyanate crosslinking agent and, if desired, PA1 (C) at least one hydroxyl-containing polyester-modified polyacrylate resin, PA0 wherein the polyacrylate resin (A) is obtainable by polymerizing PA2 (a1) at least one essentially carboxyl-free (meth)acrylic ester, PA2 (a2) at least one copolymerizable, hydroxyl-containing monomer which is different from (a3) PA2 (a3) at least one reaction product of acrylic acid and/or methacrylic acid with the glycidyl ester of an .alpha.-branched monocarboxylic acid having 5 to 18 carbon atoms per molecule, PA2 (a4) if desired, an [sic] at least one carboxyl-containing monomer, PA2 (a5) at least one polysiloxane macromonomer having a number-average molecular weight of from 1000 to 40,000 and on average from 0.5 to 2.5 ethylenically unsaturated double bonds per molecule or having on average from 0.5 to 2.5 epoxide groups per molecule, PA2 (a6) at least one aromatic vinyl compound, and PA2 (a7) if desired, at least one additional, essentially carboxyl-free monomer, PA0 the nature and quantity of the mon…