Deactivation of phosphonium salt catalyst
US4692504A · kind A · utility
19Cited by
9References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1986 |
| Grant date | Sep 8, 1987 |
| Priority date | — |
| Expiry date | Apr 30, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is disclosed for deactivating a hydrocarbyl phosphonium salt catalyst of an epoxy resin fusion reaction. The method involves contacting the hydrocarbyl phosphonium salt catalyst with a sulfonic acid, such as p-toluenesulfonic acid or methane sulfonic acid. The method is particularly suited for deactivation of moisture-resistant phosphonium salts such as methylene bis(triphenyl phosphonium halide)s.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.