Process for the production of polyurethane coatings

US5236741A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Christian Zwiener · Cologne, DE
• Josef Pedain · Cologne, DE
• Lothar Kahl · Bensberg, DE
• Klaus Nachtkamp · Cologne, DE

Key dates

• Filing date: May 1, 1992
• Grant date: Aug 17, 1993
• Expiry date: May 1, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/792
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of a polyurethane coating by coating a substrate with a coating composition containing PA1 a) a polyisocyanate component and PA1 b) an isocyanate-reactive component containing at least one compound corresponding to the formula ##STR1## wherein X represents an organic group which has a valency of n and is inert towards isocyanate groups at a temperature of 100.degree. C. or less, PA2 R.sup.1 and R.sup.2 may be identical or different and represent organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less, PA2 R.sup.3 and R.sup.4 may be identical or different and represent hydrogen or organic groups which are inert towards isocyanate groups at a temperature of 100.degree. C. or less and PA2 n represents an integer with a value of at least 2, PA1 and curing the coating composition at a temperature of 100.degree. C. or less.