Coating of epoxy-functional polyester advanced with polyester or acid (anaydride)
US6359080B1 · kind B1 · utility
Inventors
Key dates
| Filing date | May 16, 2000 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | May 16, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/934
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A (powder) coating composition comprises an epoxy-functional polyester storage-stable at temperatures of up to 40° C. and having a Tg of more than 40° C. and a crosslinking resin, wherein the epoxy-functional polyester is prepared by the reaction of(III) an intermediate epoxy-functional polyester produced by glycidating a carboxyl-functional polyester derived from(a) secondary carboxyl groups-containing aromatic or cycloaliphatic dicarboxylic acid (anhydride)(s),(b) aliphatic hydroxyl groups-containing diol(s),(c) optionally, a compound containing one primary or secondary hydroxyl group, or a compound comprising one primary or secondary hydroxyl group and one tertiary aliphatic carboxyl group,(d) optionally, a compound comprising a tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups and(e) optionally, a trihydroxyalkane or tetrahydroxyalkane; with(IV) a carboxyl-functional polyester obtained from (a) and (b) above, or (a) alone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.