Acid composition comprising a coated polyvalent carboxylic acid solid particle and a powder coating comprising the same
US5800923A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1996 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Aug 21, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An acid composition comprises a polyvalent carboxylic acid solid particle coated with a polymer. The acid composition may function as a cross-linking agent in a powder coating, which also includes a resin. The resin and the polymer of the acid composition may be the same, or they may be different. The mean particle size of the coated acid solid particles is in the range of 0.5 to 50 micrometers. When used in a powder coating, such coated solid particles reduce or eliminate sublimation of the acid cross-linking agent from the powder coating during the curing step. In addition, these coated solid particles increase the storage shelf-life of the powder coating in which they are used. Such coated particles also improve the flow characteristics of the powder coating during curing thereof and the gloss and surface quality of the final cured coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.