Color plus clear coatings employing polyepoxides and polyacid curing agents
US4650718A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Aug 19, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31529
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A color-plus-clear coating system is disclosed. A pigmented or colored base coat is first applied to a substrate followed by the application of a transparent top coat to the base coat. Either the transparent top coat, the base coat or both the top coat and base coat compositions are crosslinkable compositions comprising a polyepoxide and a polyacid curing agent which comprises a half-ester formed from reacting an acid anhydride with a polyol. The polyepoxide-polyacid curing agent in the transparent top coat provides a composite coating with outstanding gloss and distinctness of image making the composite coating particularly useful as an automotive top coat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.