Water-dispersible acrylic-modified polyester resins used in coatings and process for their preparation
US6576717B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1995 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Apr 24, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a water-dispersible acrylic-modified polyester resin containing sulfonate groups prepared by addition copolymerization of ethylenically unsaturated vinyl monomers and a polyester. The polyester is prepared from a polycondensation reaction with dicarboxylic acids, glycols, ethylenically unsaturated monomer, and a minor amount of a sulfomonomer. The acrylic-modified polyester is prepared by first producing the polyester under polycondensation conditions followed by the addition polymerization of the ethylenically unsaturated vinyl monomers. The acrylic-modified polyesters can be formed into a coating composition that has zero or very little organic solvent and is very useful to produce crosslinked cured enamels having excellent gloss, hardness, impact resistance, and water resistance such as those used in automotive finishes, appliance, and coil coatings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.