Method of preparing epoxy resins having low hydrolyzable chloride contents
US4447598A · kind A · utility
15Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1983 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | Apr 7, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The hydrolyzable "chloride" contents of epoxides prepared from epihalohydrins and phenols, aromatic amines or >N-H group-containing heterocycles are considerably reduced by a second dehydrochlorination step which comprises dissolving the epoxide in a solvent having the characteristics of a 1:1 by weight blend of methylethylketone and toluene and treating it with amounts of base and water ensuring a final base concentration equivalent to that of about 4 wt. % aqueous NaOH.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.