Composite coating with improved chip resistance
US6210758A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Nov 17, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D7/577
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention provides a method of coating a substrate with first a layer of a chip resistant primer composition that has as a resinous portion a polyurethane polymer having a glass transition temperature of 0.degree. C. or less and, optionally, a second component that has reactive functionality; and next with a layer of a thermosetting primer composition including a polyurethane polymer having a glass transition temperature of 0.degree. C. or less, an acrylic polymer having a glass transition temperature that is at least about 20.degree. C. higher than the glass transition temperature of said polyurethane polymer, and a crosslinking component that is reactive with at least one of the polyurethane polymer and the acrylic polymer; and finally with at least one layer of a topcoat composition. The reactive functionality of the second component is reactive with at least one polymer selected from the group consisting of the polyurethane polymer of the chip resistant primer composition, the polyurethane polymer of the thermosetting primer composition, the acrylic polymer of the thermosetting primer composition, and combinations thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.