Solvent-free film-forming compositions for clearcoats, coated substrates and method related thereto
US6329060A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1999 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Nov 10, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31909
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A multi-component composite coating composition is provided which includes a pigmented base coat and a transparent topcoat composition applied over the base coat. The transparent topcoat is deposited from a substantially solvent free film-forming composition which includes a thermosettable dispersion of polymeric microparticles having functionality adapted to react with a crosslinking agent and a hydrophilic crosslinking agent reactive with the functionality of the microparticles. The microparticles are prepared from one or more reaction products of ethylenically unsaturated monomers, one or more hydrophobic polymers and one or more hydrophobic crosslinking agents. Pigmented film-forming compositions as well as curable compositions containing the above-described dispersions also are provided. A method of forming the dispersion of polymeric microparticles is provided. The substantially solvent-free film-forming compositions of the invention are storage stable at room temperature and provide coatings with excellent application properties such as sag resistance and tack-free overspray, and excellent performance properties such as chip resistance and adhesion. The film-forming composit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.