Thermosetting aqueous coating compositions containing epoxy-phosphate dispersions
US4461857A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1983 |
| Grant date | Jul 24, 1984 |
| Priority date | — |
| Expiry date | Oct 31, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D163/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aqueous thermosetting coating compositions are disclosed characterized by reduced curing requirements and which produce coatings having superior cured properties. These coatings comprise water containing water miscible organic solvent and the compositions have dispersed therein, based on total resin solids, from 25% to 85% of carboxy-functional organic solvent-soluble copolymer salt with a volatile amine in which the copolymer contains hydroxy groups providing an hydroxyl value in the range of 30 to 300, from 5% to 40% of a water soluble or water dispersible aminoplast or phenoplast curing agent, and from 2% to 35%, of a water dispersible epoxy phosphate ester polymer which is an oxirane-function-free, salt reaction product of (1) a monoester reaction product containing residual epoxy functionality, of (a) a resinous polyepoxide having at least about 1.4 oxirane groups per molecule, and (b) less than 0.9 mole of orthophosphoric acid for each oxirane equivalent in the polyepoxide, with (2) at least 1 mole of a volatile amine per equivalent of oxirane functionality in the monoester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.