Modified aminoplast crosslinkers and powder coating compositions containing such crosslinkers
US6624249B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2001 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2150/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A crosslinking agent which is an ungelled reaction product of (a) at least one aminoplast resin, (b) at least one polyfunctional polymer having functional groups reactive with aminoplast resin (a) and having a glass transition temperature of at least 15° C.; and (c) at least one compound different from (b) having active hydrogen groups reactive with aminoplast resin (a) is provided. Also provided is a method for preparing the crosslinking agent. Further provided is a powder coating composition which includes the crosslinking agent. Additionally provided is a multi-layer composite coating composition having a base coat layer and a top coat over the base coat deposited from the previously described powder coating composition. Coated substrates are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.