Preparation of adhesive bonds using carbodiimide-containing dispersions with heat activation

US6616797B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Ulrike Licht · Mannheim, DE
• Eckehardt Wistuba · Bad Dürkheim, DE
• Hans J. Neumann · Oberkochen, DE

Key dates

• Filing date: Jan 24, 2000
• Grant date: Sep 9, 2003
• Expiry date: Jan 24, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2475/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Adhesive bonds can be formed by a process that includes applying a dispersion containing a polyurethane which has structural units of formula (I)—N═C═N—  (I)to a surface. The dispersion is first coated onto the surface to form a coating. The coating is dried to give an essentially anhydrous coating. The dried coating is then subjected to heat activation. The adhesive bond is formed by joining the heat activated coating to itself or to another surface.