Preparation of arylene oligomers

Details Preparation of arylene oligomers Preparation of arylene oligomers

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

048410110

ABSTRACT:
Friedel Crafts preparation of arylene ether (especially arylene ether ketone) oligomers 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 Friedel Crafts reaction product, and controlling agents of relatively low molecular weight, e.g., benzoic acid, can surprisingly be selected to produce dispersions of the resulting oligomers.

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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