Adhesive joining of surfaces using thermosetting polyurethane urea reactive adhesive compositions

US4595445A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rudolf Hombach · Leverkusen, DE
• Manfred Dollhausen · Odenthal, DE
• Heinrich Hess · Cologne, DE
• Gerhard Grogler · Leverkusen, DE
• Richard Kopp · Cologne, DE
• Artur Reischl · Leverkusen, DE

Key dates

• Filing date: Jan 24, 1985
• Grant date: Jun 17, 1986
• Expiry date: Jan 24, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S528/902
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to the use of thermosetting polyurethane urea reactive adhesive compositions which are stable at ambient temperature but rapidly set at higher temperatures, wherein the adhesive comprises stabilized finely-divided polyisocyanates of retarded reactivity of which 0.1 to 25% of the NCO-groups are surface-modified and higher and/or lower molecular polyamines (optionally with polyols as additional reactive components). An important feature of these thermosetting reactive adhesive compositions is their capacity for storage at ambient temperature and their spontaneous increase in viscosity at relatively low heating temperatures which prevents the adhesive from running off during the heating period when applied to vertical surfaces.