Polyurethane-based reactive mass and its use for the production of coatings

US4732957A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Schuster · Kawkawlin, US
• Rudolf Punessen · Münstermaifeld, DE
• Karl Nutzel
• Richard Kopp · Cologne, DE
• Werner Rasshofer · Kürten, DE

Key dates

• Filing date: Mar 17, 1986
• Grant date: Mar 22, 1988
• Expiry date: Mar 17, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/8032
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polyurethane-based reactive mass composed of PA0 (a) at least one organic compound in the molecular weight range of from 400 to 12000 containing isocyanate reactive groups and having a functionality from 2 to 8, PA0 (b) optionally an organic compound in the molecular weight range of from 62 to 399 containing isocyanate reactive groups and having a functionality from 2 to 8. PA0 (c) catalysts, PA0 (d) aliphatic isocyanate compounds and PA0 (e) optionally other auxiliary agents and additives known per se, characterized in that the aliphatic isocyanate compound used is one based on hexamethylene diisocyanate, hydrogenated diphenylmethane diisocyanate or isophorone diisocyanate containing isocyanurate and/or uretdione units and/or urethane and/or uretoneimine and/or oxadiazatrione groups is suitable for the production of lightfast coatings, including coatings in light colors, in particular for the formation of edgings round wooden panels without these panels having first to be dried down to the maximum dampness of 7% by weight.