Powder coating of semicrystalline and amorphous polyesters with crosslinker
US6635721B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2000 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Sep 18, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermosetting powder compositions comprising as binder a mixture of polyesters containing carboxyl groups and of a crosslinking agent having functional groups capable of reacting with the carboxyl groups.The polyesters comprise:(a) a semicrystalline polyester containing carboxyl groups, which comprises, with respect to the total amount of alcohols, of from 85 to 100 mol % of 1,4-cyclohexanediol and of from 0 to 15 mol % of at least one other aliphatic and/or cycloaliphatic polyol and, with respect to the total amount of acids, of from 85 to 100 mol % of a straight-chain saturated dicarboxylic aliphatic acid having from 4 to 14 carbon atoms and of from 0 to 15 mol % of at least one other aliphatic and/or cycloaliphatic and/or aromatic polycarboxylic acid; and(b) an amorphous polyester containing carboxyl groups, which comprises, with respect to the total amount of acids, of from 70 to 100 mol % of isophthalic acid and of from 0 to 30 mol % of at least one other aliphatic and/or cycloaliphatic and/or aromatic polycarboxylic acid and, with respect to the total amount of alcohols, of from 70 to 100 mol % of neopentyl glycol and/or of 2-butyl-2-ethyl-1,3-propanediol and of from 0 to 30 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.