Thermotropic polyester anhydride polymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate

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528364, 528422, 528425, 528125, 528126, 528128, 528172, 528173, 528183, 528184, 528185, 528191, 528193, 528194, 528195, 528206, 528208, 528209, 528210, 528212, 528220, 528229, 528271, 528337, 528339, 528340, 528344, 528348, 528360, 528361, 528363, C08G 6318, C08G 6360, C08G 6944

Patent

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044143818

ABSTRACT:
A melt-processable aromatic polyester anhydride characterized in that from 5 to 80% of the units linking the reactant residues in the polymer chain have the formula: ##STR1## the remaining linkages between the residues of the reactants being of the formula: ##STR2## optionally together with linkages of the formula: ##STR3## substantially all of said remaining linkages being disposed in coaxial or parallel and oppositely directed manner with respect to the residues to which they are linked, the polyester anhydride having a solubility of less than 5% by weight in dimethyl sulphoxide at room temperature.

REFERENCES:
patent: 3200097 (1965-08-01), Windholz
patent: 3515695 (1970-06-01), Loughran et al.
Yoda, Makromolekulare Chemie, vol. 32, pp. 1-12 (1959).
Conix, Journal of Polymer Science, vol. 29, pp. 343-353 (1958).

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