Patent · US Expired

Polyarylene polyethers

US4108837A · kind A · utility

164Cited by

1References

63Claims

0Family size

Assignee

UNION CARBIDE CORPORATION · US

Inventors

Robert N. Johnson · Phoenixville, US
Alford G. Farnham · Mendham, US

Key dates

Filing date	Feb 28, 1972
Grant date	Aug 22, 1978
Priority date	—
Expiry date	Feb 28, 1992

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.