Use of tin catalysts for the production of polyurethane coatings

US8946372B2 · kind B2 · utility

Assignee

• Bayer Intellectual Property GmbH · DE

Inventors

• Frank Richter · Frankfurt, DE
• Raul Pires · Cologne, DE
• Stephan Reiter · Langenfeld, DE
• Jens Krause · Rahden, DE
• Klaus Jurkschat · Dortmund, DE
• Ljuba Iovkova · Dortmund, DE
• Markus Schürmann · Recklinghausen, DE
• Gerrit Bradtmöller · Dorsten, DE

Key dates

• Filing date: Oct 26, 2010
• Grant date: Feb 3, 2015
• Expiry date: May 15, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2231/14
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to the use of specific inorganic Sn(IV) for the production of polyisocyanate polyaddition products from a) at least one aliphatic, cycloaliphatic, araliphatic and/or aromatic polyisocyanate, b) at least one NCO-reactive compound, c) at least one thermolatent inorganic tin-containing catalyst, d) optionally further catalysts and/or activators other than c), e) optionally fillers, pigments, additives, thickeners, antifoams and/or other auxiliary substances and additives, wherein the ratio of the weight of the tin from component c) and the weight of component a) is less than 3000 ppm when component a) is an aliphatic polyisocyanate and less than 95 ppm when component a) is an aromatic polyisocyanate, wherein as thermolatent catalysts cyclic tin compounds of formula I, II or III:wherein n>1,are used.