Epoxy fusion catalyst and process
US4829141A · kind A · utility
0Cited by
19References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Jul 31, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/688
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process is disclosed for preparing an advanced epoxy resin by reacting a relatively low molecular weight polyepoxide with a phenol, thiophenol, carboxylic acid or carboxylic acid anhydride in the presence of a catalytic amount of an alkyl substituted phosphonium salt such as tributyl phosphonium bromide. The process can be carried out under reaction conditions, such as the presence of water, which are deleterious to certain epoxy advancement catalysts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.