Aqueous dispersions of epoxy resins
US6221934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1998 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Jul 17, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2363/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Stable aqueous emulsions of epoxy resins are provided using an epoxy-functional surfactant prepared by reacting an amidoamine having the formula: ##STR1## wherein R.sup.1 is an alkyl, aryl, or arylalkyl group or mixtures thereof having 1 to 15 carbon atoms, R.sup.2 is aliphatic, cycloaliphatic, or aromatic group having 2 to 18 carbon atoms optionally containing non-reactive oxygen or at most all average of 4 secondary and/or tertiary nitrogen atoms per structure in the backbone, X and Y are independently a hydrogen, methyl or ethyl group with the provision that if X is methyl or ethyl, Y is hydrogen or if Y is methyl or ethyl, X is hydrogen, and n+m+o is a real number from 40 to 400, and n+o is a real number in an amount effective to provide resin emulsification, and the ratio of (I) to (II) by weight. is in the range of 100:0 to 0:100, the ratio of (I) to (III) by weight in the range of 100:0 to 0:100, and the ratio of (II) to (III) by weight in the range of 100:0 to 0:100, and at least one epoxy resin having a functionality of from greater than 0.8 epoxide group per molecule in an amine to epoxy equivalent ratio of at least 1:2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.