Clear coating composition for clear coat/color coat finish
US5314953A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1993 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Sep 8, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31605
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A improved process for applying a clear coat/color coat composition to a substrate in which a color coat is applied to a substrate and then a clear coat is applied over the color coat; the improvement used therewith is a clear coating composition having a film forming binder solids content of about 30-70% by weight and an organic liquid carrier, wherein the binder contains about PA0 (A) 50-80% by weight, based on the weight of the binder, of an acrylic polymer of polymerized monomers of styrene, a methacrylate monomer from the group of methyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate or any mixtures thereof, a second methacrylate monomer from the group of n-butyl methacrylate, isobutyl methacrylate or ethyl hexyl methacrylate or any mixtures thereof and a hydroxy alkyl methacrylate or acrylate each having 1-4 carbon atoms in the alkyl group, where the polymer has a number average molecular weight of about 5,000-20,000 determined by gel permeation chromatography and a calculated Tg of at least 40.degree. C. and correspondingly, PA0 (B) 20-50% by weight, based on the weight of the binder, of an organic polyisocyanate; wherein the clear coating composition on curin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.