Production of aromatic polyethers

Details Production of aromatic polyethers Production of aromatic polyethers

1977-07-11

1978-08-08

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528174, 528175, 528212, 528218, 528219, C08G 6540, C08G 7523

Patent

active

041056361

ABSTRACT:
Aromatic polyethers are made by boiling an organic sulphoxide or sulphone solvent containing i) an equimolar mixture of a bisphenol and an aromatic dihalo compound or ii) a halophenol, in which dihalo compound or halophenol the halogen atoms are activated by ortho or para --SO.sub.2 -- or --CO-- groups, and an alkali metal carbonate with removal of the water produced by the reaction by distillation in the absence of an azeotrope forming solvent.

REFERENCES:
patent: 3332909 (1967-07-01), Farnham et al.
patent: 3941748 (1976-03-01), King
patent: 4009149 (1977-02-01), King et al.
patent: 4010147 (1977-03-01), Rose
patent: 4036815 (1977-07-01), Feasey et al.

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