Colloidal metal oxides having blocked isocyanate groups

US5998504A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Stefan Groth · Leverkusen, DE
• Claus Kobusch · Meerbusch, DE
• Lutz Schmalstieg · Neunburg vorm Wald, DE
• Lothar Puppe · Burscheid, DE
• Theodor Engbert · Recklinghausen, DE
• Manfred Bock · Leverkusen, DE
• Gerhard Jonschker · Friedrichsthal, DE

Key dates

• Filing date: Apr 3, 1998
• Grant date: Dec 7, 1999
• Expiry date: Apr 3, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/8096
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to colloidal metal oxides having blocked isocyanate groups, which are based on the reaction product of PA1 A) blocked isocyanate group-containing silanes corresponding to formula (I) ##STR1## wherein R represents hydrogen or an organic group having 1 to 40 carbon atoms, PA2 X, Y and Z represent identical or different organic groups having 1 to 30 carbon atoms which are inert to isocyanate groups below 100.degree. C., provided that at least one of these groups is a C.sub.1 -C.sub.4 -alkoxy group, PA2 Q represents an organic group which contains at least one isocyanate group reacted with a blocking agent and PA2 n is 2, 3 or 4 with PA1 B) colloidal metal oxides selected from Al, Si, Ti, Ta, W, Hf, Zr, Sn and Y. The present invention also relates to the use of modified metal oxides, either alone or in combination with compounds containing at least two isocyanate-reactive groups, for the preparation of optionally expanded polyurethane plastics, lacquers or coating agents.