Multidimensional polyesters

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

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528271, 528272, 528274, 528282, 528289, 528292, 528293, 528295, 528298, 528299, 528300, 524175, C08G 6382

Patent

active

057566453

ABSTRACT:
The yield of fully substituted, multidimensional aromatic hubs in the condensation of hydroxyl and acid halide functionalities is improved by adding a thallium catalyst, such as thallium ethoxide (Tl-OC.sub.2 H.sub.5), in the solvent.

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Vinogradova et al., Vysokomal. Soedin., Ser. A (1967) 9(8) 1797-1801.

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