Preparation of arylene oligomers

Details Preparation of arylene oligomers Preparation of arylene oligomers

C - Chemistry, Metallurgy

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C07C 49/84 (2006.01) C07C 45/46 (2006.01) C07C 45/47 (2006.01) C07C 65/40 (2006.01) C07D 209/48 (2006.01) C08G 61/00 (2006.01)

Patent

CA 1312878

RK305 ABSTRACT PREPARATION OF ARYLENE OLIGOMERS 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, RSO3X, 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.

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