Polyurethane-ureas based on cis-trans-1,4-diaminocyclohexane

USRE29623E · kind E · reissue

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Harald Oertel · Odenthal, DE
• Bruno Zorn
• Wilhelm Thoma · Leverkusen, DE
• Klaus Noll · Cologne, DE

Key dates

• Filing date: Sep 3, 1976
• Grant date: May 2, 1978
• Expiry date: Sep 3, 1996

Classification

• Technology area (CPC —): General

Abstract

Light stable polyurethane coatings with a considerably increased softening range and melting points coupled with improved resistance to perchlorethylene is obtained by using a chain extender comprising at least 80 mol % 1,4-diamino cyclohexane with a cis/transisomer ratio of from 10/90 to 60/40 .Iadd.and by using aliphatic or cycloaliphatic diisocyanates wherein such diisocyanates consist of at least 75 mol percent of 1-isocyanato-3-isocyanatomethyl-3,5,5-trimethyl cyclohexane.Iaddend..