Production of compounds
US5362835A · kind A · utility
8Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1991 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Dec 9, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/687
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the production of a material having an increased molecular weight relative to the diepoxide starting material the material being either a hydroxy-terminated or an epoxy-terminated material comprising PA1 a) reacting a diepoxide with a dihydroxy compound, in the presence, as catalyst, of a triflate salt of a metal of Group IIA, IIB, IIIA, IIIB, or VIIIA of the Periodic Table of Elements (according to the IUPAC 1970 convention); PA1 b) de-activating the triflate salt catalyst; and PA1 c) optionally advancing the material produced in step b), with an aromatic diol or phenol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.