Modified polyurethanes with increased light stability

US4102870A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Peter Hofmann · Goldkronach, DE
• Helmut Muller · Bensberg, DE
• Jean Rody · Riehen, CH

Key dates

• Filing date: May 4, 1977
• Grant date: Jul 25, 1978
• Expiry date: May 4, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/5057
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The incorporation of sterically hindered piperidine derivatives into polyurethanes protects this polymer material against light degradation. Usable for the incorporation are piperidine derivatives which are at least difunctional towards isocyanates and contain the structure ##STR1## wherein R is hydrogen or alkyl having 1 to 5 carbon atoms.