Polyarylene polyethers
US4175175A · kind A · utility
152Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1978 |
| Grant date | Nov 20, 1979 |
| Priority date | — |
| Expiry date | May 8, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/4025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyarylene polyethers composed of recurring units EQU --O--E--O--E'-- where E is the residuum of a dihydric phenol and E' is the residuum of a benzenoid compound having an inert electron withdrawing group ortho or para to the valence bonds and where both E and E' are bonded to the ether oxygens through aromatic carbon atoms. The polyarylene polyethers are prepared by reacting a double alkali metal salt of a dihydric phenol with a dihalobenzenoid compound in the presence of certain sulfoxide or sulfone solvents under substantially anhydrous conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.