Process for the preparation of an aromatic polyether in the pres

Details Process for the preparation of an aromatic polyether in the pres Process for the preparation of an aromatic polyether in the pres

1990-08-07

1993-03-16

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528128, 528174, 528175, 528219, 525534, 525535, C08G 802, C08G 1400, C08G 6538, C08G 7500

Patent

active

051945614

ABSTRACT:
Process for the preparation of an aromatic polyether in the presence of finely divided condensation auxiliaries.
The process for the preparation of an aromatic polyether by condensation of the reactants in the presence of carbonates of metals of Group I of the Periodic Table, as condensation auxiliaries, employs the metal carbonates sodium carbonate or sodium bicarbonate or mixtures thereof in the form of very finely ground salts.
The fine particle size distribution of the carbonate allows a significant shortening of the reaction times and permits polyethers having a defined degree of condensation to be reproducibly prepared.

REFERENCES:
patent: 3065205 (1962-11-01), Bonner
"Comprehensive Polymer Science", vol. 5, Pergamon Press 1989, p. 492.

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