Urethane modified waterborne dispersions
US5369152A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1993 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Apr 14, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/184
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An excess of a urethane modified polyfunctional epoxide compound is reacted with a tertiary amine salt to form a quaternized epoxy resin. The quaternized epoxy resin is then dispersed in water. Therein the residual epoxy functionality is reacted with a polyamine, to form a waterborne epoxy resin system. The urethane modification leads to significant improvements in properties such as dry rate, adhesion, and chemical resistance, particularly aviation hydraulic fluid resistance. The waterborne dispersions of the urethane modified epoxy resins are useful in coating, ink and adhesive applications at ambient and elevated temperature curing conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.