Self-crosslinkable polyurethanes

US4153775A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans D. Winkelmann · Charleston, US
• Karlheinz Wolf · Leverkusen, DE
• Harald Oertel · Odenthal, DE
• Norbert Weimann · Leverkusen, DE

Key dates

• Filing date: Feb 21, 1978
• Grant date: May 8, 1979
• Expiry date: Feb 21, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S528/906
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for the production of solutions of segmented self-crosslinkable polyurethanes by incorporating in the polymer chain segments of the general formula EQU M--CO--NH--D'--NH--CO--A, wherein D' is the divalent residue of an organic diisocyanate; M is a diol containing residue derived by reaction of the active N-hydrogen of an aminodiol or a hydrazinodiol which contains a primary or secondary amino group, with an isocyanate group; and A is an isocyanate masking group.