Process for making wrinkle-free coating using solventborne clearcoat composition over waterborne basecoat composition
US5283084A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 8, 1992 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | May 8, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D2451/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The presence of an acid catalyst in a clearcoat composition enables the production of a wrinkle-free coating in a process comprising the simultaneous curing of applied layers of both a waterborne basecoat composition as well as a solventborne clearcoat composition. The waterborne basecoat composition comprises an organic resin, a crosslinker, and a free amine. The solventborne clearcoat composition comprises an acid catalyst in an amount significantly higher than the quantity normally used in high solids original equipment manufacturer clearcoat compositions, a polymer which is crosslinkable with melamine, and a monomeric melamine type crosslinking resin for crosslinking the polymer. The process is most preferably used to make an automotive quality topcoat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.