Moisture-hardening coating composition and method for its production

US5081203A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Josef Pedain · Cologne, DE
• Jurgen Schwindt · Leverkusen, DE
• Theodor Engbert · Recklinghausen, DE
• Manfred Schonborn · Gerhardshofen, DE

Key dates

• Filing date: Jun 26, 1990
• Grant date: Jan 14, 1992
• Expiry date: Jun 26, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/7664
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to of a coating composition containing a moisture-hardening binder based on organic polyisocyanates which is prepared by forming a mixture containing at least those auxiliaries and additives which are not completely dry and an isocyanate component a) which has an average NCO functionality of 1.05 to 1.8 and is based on the reaction product of PA0 a1) a polyisocyanate mixture of the diphenylmethane series with PA0 a2) a monohydric C.sub.1-26 alkanol which may contain ether bridges, and after the isocyanate/water reaction is substantially complete, further mixing the mixture with an isocyanate component b) which has an isocyanate content of 2.5 to 25% by weight and any remaining auxiliaries and additives, the quantities of components a) and b) corresponding to a weight ratio of a) to b) of 1:1 to 1:30. The present invention also relates to a process for the preparation of these coating compositions.