Modified aminoplast crosslinkers and powder coating compositions containing such crosslinkers
US6784258B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2001 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Oct 16, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/934
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A crosslinking agent is provided, prepared by reacting (A) an aminoplast resin; (B) a reactive urethane group-containing adduct and (C) at least one other compound having active hydrogen groups reactive with aminoplast resin (A). Compound (C) is selected from:(i) compounds having the structure (I):  wherein X is aromatic; R1, R2, and R3 each independently represents H, (cyclo)alkyl having from 1 to 12 carbon atoms, aryl, alkaryl, aralkyl, or an active hydrogen-containing group,(ii) compounds having the structure (II) or (III):  where R′ and R″ each independently represents an aromatic group or an alkyl group having 1 to 12 carbon atoms; and(iii) compounds different from (i) and (ii), having a melting point of at least 80° C.Further provided are methods for preparing the crosslinking agent curable compositions containing the crosslinking agent, and coated substrates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.