Method for the production of adhesive-coated articles, articles obtainable thereby and their use

US9321939B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Jörg Büchner · Bensberg, DE
• Harald Kraus · Leverkusen, DE
• Pantea Nazaran · Neunburg vorm Wald, DE
• Matthias Wintermantel · Bensberg, DE

Key dates

• Filing date: Sep 14, 2011
• Grant date: Apr 26, 2016
• Expiry date: Mar 26, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2843
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Method for the production of adhesive-coated articles, articles obtainable thereby and their use A method for the production of adhesive-coated articles comprises the steps of: (I) providing a substrate; (II) applying a first polyurethane and/or polyurethane-polyurea polymer onto the substrate, the first polyurethane and/or polyurethane-polyurea polymer being capable of attaining an at least partially crystalline state with a final degree of crystallinity and wherein during and/or after the application the first polyurethane and/or polyurethane-polyurea polymer is present in a non-crystalline state. The method further comprises the steps: (III) applying onto the first polyurethane and/or polyurethane-polyurea polymer of step (II) a composition comprising a mixture of a second polyurethane and/or polyurethane-polyurea polymer and furthermore an acrylate polymer, wherein the application is performed while the degree of crystallinity of the first polyurethane-polyurea polymer is lower than its final degree of crystallinity; and (IV) cooling the article obtained to a temperature below the glass transition temperature of the acrylate polymer.