Sol-gel coating for single-layer or multi-layer varnishes

US6872765B1 · kind B1 · utility

Assignee

• BASF COATINGS GMBH · DE

Inventors

• Peter Betz · Munster, DE
• Horst Hintze-Brüning · Hachenburg, DE
• Wilfried Stubbe · Greven, DE
• Heinz-Peter Rink · Hachenburg, DE

Key dates

• Filing date: Mar 6, 2000
• Grant date: Mar 29, 2005
• Expiry date: Mar 6, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L83/14
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a sol-gel coating material containing (A) an acrylate copolymer solution containing at least one acrylate copolymer (A1); (B) a parent varnish which can be prepared by hydrolysis and condensation of at least one hydrolysable silane (B1) of the general formula (I) SiR4, in which the variable R=hydrolysable groups, hydroxy groups and non-hydrolysable groups, provided that there should be at least one, preferably two, hydrolysable groups; and (C) an additive solution containing c1) at least one ethylenically unsaturated compound containing at least one epoxide group; c2) at least one silane (B1) with at least one non-hydrolysable group R presenting at least one epoxide group; and c3) at least one adduct of at least one silane (B1) with at least one non-hydrolysable group R presenting at least one amino group and at least one cyclic ethylenically unsaturated dicarboxylic acid anhydride. The invention also relates to the use of said sol-gel coating material for producing scratchproof sol-gel coatings.