Production of aromatic polyethers

Details Production of aromatic polyethers Production of aromatic polyethers

1978-01-30

1979-11-27

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528128, 528174, 528219, C08G 6540

Patent

active

041762223

ABSTRACT:
Aromatic polyethers containing --SO.sub.2 -- and/or --CO-- groups are made by reacting (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, with sodium carbonate or bicarbonate in admixture with a second alkali metal carbonate or bicarbonate the alkali metal of the second carbonate or bicarbonate being of higher atomic number than that of sodium. The amount of the second alkali metal carbonate or bicarbonate is such that there is 0.001 to 0.2 gram atom of the second alkali metal per gram atom of sodium.

REFERENCES:
patent: 3332909 (1967-07-01), Farnham et al.
patent: 3941748 (1976-03-01), King

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