Thermosetting glycidyl modified acrylic powder coatings
US5270416A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1992 |
| Grant date | Dec 14, 1993 |
| Priority date | — |
| Expiry date | Sep 4, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/904
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Thermosetting powder coating compositions are produced based on a low molecular weight glycidyl functional copolymer produced by solvent polymerization of ethylenic monomers in an organic solvent polymerization medium containing at least 15% by weight organic solvent based on the weight of solvent and monomers copolymerized, where the ethylenic monomers copolymerized comprise on a weight basis between about 15% and 35% glycidyl methacrylate, between about 5% and 60% methyl methacrylate, between about 2% and 15% butyl methacrylate, and between about 5% and 50% styrene, to produce glycidyl functional copolymer having a melt viscosity between 150 and 400 poise and a Tg between 80.degree. C. and 100.degree. C., where the copolymer is coreactive with carboxyl functional crosslinking compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.