Coating compositions containing alkoxysilanes

US6281322A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Stefan Groth · Leverkusen, DE
• Reinhard Halpaap · Odenthal, DE
• Markus Mechtel · Neunburg vorm Wald, DE
• Lutz Schmalstieg · Neunburg vorm Wald, DE
• Philip E. Yeske · Pittsburgh, US

Key dates

• Filing date: Dec 1, 1999
• Grant date: Aug 28, 2001
• Expiry date: Dec 1, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31663
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to coating compositions containing 40 to 100% by weight, based on resin solids, of an alkoxysilyl-functional polyisocyanate polyurea which is reaction product of PA1 A) a polyisocyanate component having an average functionality of 2.5 to 5.5, an NCO content of 11.0 to 20.0% by weight and a monomeric diisocyanate content of less than 10% by weight, and containing at least 50% by weight of a polyisocyanate prepared from 4,4'-diisocyanatodicyclohexyl-methane with PA1 B) at least 0.7 equivalents, based on the equivalents of isocyanate groups, of an aminosilane corresponding to formula (I) EQU (RO).sub.n Y.sub.(3-n) Si--CH.sub.2 CH.sub.2 CH.sub.2 --NHZ (I), PA1 wherein PA2 R represents methyl or ethyl, PA2 Y represents methyl, PA2 Z represents H, a C.sub.1- C.sub.12 alkyl or CH.sub.2 CH.sub.2 CH.sub.2 --Si(OR).sub.n Y.sub.3-n, and PA2 n is 1, 2 or 3, and PA1 C) optionally other isocyanate-reactive compounds. The present invention also relates the hydrolyzates/condensates that are prepared by adding water or an aqueous solution of a catalyst to the coating compositions according to the invention.