Process to prepare aqueous dispersions of epoxy resins
US6143809A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1998 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Jul 17, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2363/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process to provide an aqueous dispersion is provided comprising the steps of: PA1 a) emulsifying a mixture comprising PA2 i) water, PA2 ii) at least one epoxy resin having a functionality of greater than 0.8 epoxide group per molecule, PA2 iii) from 0.1 to 20 weight percent, based on the epoxy resin, of at least one polyoxyalkylene surfactant, and PA2 iv) optionally an acetone-free solvent solution to produce a resin-surfactant emulsion; and PA1 b) adding a solvent mixture to said resin-surfactant emulsion, said solvent mixture comprising i) acetone and ii) a non-volatile hydrophobic liquid resin or resin modifier to produce the aqueous dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.