Process for the preparation of an aromatic polyether

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

1990-08-07

1992-01-14

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, 528150, 528151, 528154, 528171, 528174, 528220, 528223, 528226, 528373, 528390, 528391, 524787, C08G 802

Patent

active

050812149

ABSTRACT:
A process for the preparation of an aromatic polyether by condensation of dihydric phenols with activated aromatic dihalo compounds or by self-condensation of polynuclear activated halophenols employs a mixture of sodium carbonate and sodium hydrogen carbonate as a condensation auxiliary.
By this means, the relatively low reactivity of the sodium carbonate is enhanced and the reaction rate is significantly increased.

REFERENCES:
patent: 3065205 (1962-11-01), Bonner
patent: 4320224 (1982-03-01), Rose et al.
patent: 4638044 (1987-01-01), Kelsey
patent: 4731429 (1988-03-01), McMaster et al.
patent: 4891167 (1990-01-01), Clendinning et al.
patent: 4952665 (1990-08-01), Ebata et al.

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