N-acyl aminomethylene phosphonates and their use in waterborne coating compositions
US5429674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1994 |
| Grant date | Jul 4, 1995 |
| Priority date | — |
| Expiry date | Sep 12, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D5/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
N-acyl aminomethylene phosphonates are provided having a group defined by the following general formula: ##STR1## wherein R.sub.1 is hydrogen, an aliphatic radical having 1 to 25 carbon atoms, or an aromatic radical having 6 to 25 carbon atoms; R.sub.2 is hydrogen, an aliphatic radical having 1 to 25 carbon atoms, or an aromatic radical having 6 to 25 carbon atoms; and R.sub.3 is a group remaining after reaction of a hydroxyl group-containing or epoxy group-containing polymer with an acidic hydrogen of a ##STR2## group. Also provided are waterborne coating compositions containing metallic pigments which are normally reactive with water or moisture to release hydrogen gas, stabilized against gassing by incorporation of these N-acyl aminomethylene phosphonates into the waterborne coating compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.