Aminoplast crosslinkers derived from aromatic heterocycles containing nitrogen and powder coating compositions containing such crosslinkers
US7141308B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2003 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Mar 20, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31942
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A crosslinking agent that is an ungelled reaction product of (a) at least one aminoplast resin and (b) at least one aromatic heterocycle containing at least one nitrogen atom wherein the crosslinking agent is essentially free of active hydrogen functional groups and has a glass transition temperature of at least 10° C. is disclosed. Methods for preparing crosslinking agents are also disclosed. Further provided is a curable powder coating composition including a polymer having a glass transition temperature of at least 30° C. containing reactive functional groups and the present crosslinking agent; a multilayer composite coating composition and substrates coated therewith are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.