Process for the preparation of aromatic polyethers with mixture

Details Process for the preparation of aromatic polyethers with mixture Process for the preparation of aromatic polyethers with mixture

1984-11-21

1987-01-13

Anderson, Harold D.

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 6538, C08G 6540

Patent

active

046365575

ABSTRACT:
The invention relates to a process for the preparation of aromatic polyethers by condensation of the reactants in the presence of a condensation agent consisting of a mixture of metal carbonates comprising (a) lithium and/or an alkaline earth metal carbonate and (b) sodium, potassium, rubidium and/or cesium carbonate.
The combination of carbonates (a) and (b) according to the invention leads to a surprising increase in activity.

REFERENCES:
patent: 3065205 (1962-11-01), Bonner
patent: 3332909 (1967-07-01), Farnham et al.
patent: 3941748 (1976-03-01), King
patent: 4108837 (1978-08-01), Johnson et al.
patent: 4175175 (1979-11-01), Johnson et al.
patent: 4176222 (1979-11-01), Cinderey et al.

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