Aqueous polyacrylate systems for varnishing plastic surfaces

US5139882A · kind A · utility

Assignee

• Rohm GmbH Chemische Fabrik · DE

Inventors

• Wilhelm Elser · Riedlingen, DE
• Klaus Langerbeins · Langen, DE
• Dieter Tessmer · Darmstadt, DE
• Ursula Rausch · Griesheim, DE
• Karl J. Folsch · Mainz, DE

Key dates

• Filing date: Jan 23, 1990
• Grant date: Aug 18, 1992
• Expiry date: Jan 23, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31935
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Varnishing plastic surfaces with a clear or pigmented aqueous dispersion of a (meth)acrylate copolymer of (a) 20 to 90% by weight of acrylic and/or methacrylic acid alkyl or cycloalkyl esters with 1 to 10 carbon atoms in the ester group; (b) 80 to 10% by weight of acrylic and/or methacrylic acid esters with aromatic groups as the ester group or containing aromatic groups in the ester group; and (c) optionally, small quantities of other monomers, results in the formation of a firmly adhering, water and alcohol resistant finish. The copolymers are preferably emulsion polymers and are synthesized as multiple-phase polymers according to the core-shell model.