Epoxy fusion process
US4732958A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1986 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Dec 30, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
According to the invention, a relatively low molecular weight epoxy resin is reacted with a hydroxyl group-containing compound in the presence of a bis(trihydrocarbyl phosphine)iminium salt catalyst to produce a high molecular weight fusion reaction product. The process is particularly useful in reacting an epoxy resin having a molecular weight of less than about 500 with bisphenol-A in the presence of a bis(phosphine)iminium halide to produce a fusion reaction product having a molecular weight within the range of about 500 to 7000. The catalyst is relatively water-insensitive, and the reaction can therefore be carried out in the presence of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.