Preparation of poly(arylene ether ketones)

Details Preparation of poly(arylene ether ketones) Preparation of poly(arylene ether ketones)

1987-09-11

1989-06-20

Foelak, Morton

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528128, 528222, 528223, 528224, 528225, 525242, 525280, 525309, C08G 802, C08G 1400

Patent

active

048410136

ABSTRACT:
Friedel Crafts preparation of arylene ether ketone polymers with an exceptionally high degree of isomeric purity and freedom from by-products can be achieved by adding to the Lewis acid reaction system a protic controlling agent selected from ROX, water, RCOOX, RSO.sub.3 X, and ROY, wherein R is organic, X is hydrogen or metal, and Y is metal. Contrary to conventional expectation, the protic agent does not significantly acylate or alkylate the polymer, and agents of relatively low molecular weight, e.g. benzoic acid, can be selected to produce dispersions of the resulting polymers. The controlling agent also apparently acts to maintain the polymer in solution until a desired molecular weight is reached.

REFERENCES:
patent: 3442857 (1969-06-01), Thornton
patent: 4396755 (1983-07-01), Rose
patent: 4698393 (1987-10-01), Jansons et al.
patent: 4709007 (1987-11-01), Jansons et al.
patent: 4721771 (1988-01-01), Jansons et al.
Fieser & Fieser, Advanced Organic Chemistry, pp. 649-653 (Reinhold 1961).

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