Other

Petr Maximilianovich Valetsky

Vasily Vladimirovich Korshak

Lev B Sokolov

Svetlana Vasilievna Vinogradova

Grigory Lvovich Slonimsky

Nikolai Danilovich Zhuravlev

Abdulakh Kazbulatovich Mikitaev

Ivan Pavlovich Storozhuk

Larisa Borisovna Shirokova

Ljudmila Fedorovna Nebosenko

Andrei Alexandrovich Askadsky

Jury Sergeevich Kochergin

The present invention relates to novel compounds, viz. poly(arylate-sulphones) and to a method of preparing same. The compounds according to the present invention have the following formula: ##STR1## WHEREIN R is a carbon-to-carbon bond in para- or meta-position; ##STR2## n, m are indices denoting statistical distribution of structures over the macrochain; n and m are statistical values ranging from 1 to 10; x is a statistical value ranging from 1 to 100; y = 3 to 20; z = 5 to 20. The method of preparing said poly-(arylate-sulphones) comprises polycondensation of dichloroanhydrides of dicarboxylic acids with a mixture of bisphenol of the formula: ##STR3## and an oligosulphone of the formula: ##STR4## wherein y = 3 to 20; ##STR5## said oligosulphone being contained in the mixture in an amount ranging from 3 to 97% by weight as calculated for the desired poly(arylate-sulphone). The reaction is conducted in a medium of chlorinated hydrocarbons, followed by isolation of the desired product. The poly(arylate-sulphones) according to the present invention have a melt viscosity within the range of from 10.sup.3.8 to 10.sup.5.0 poises at a temperature of 330.degree. C and a shear stress of 10.sup.6 dn/cm.sup.2, which substantially facilitates their processing into articles by injection-molding or extrusion; they also feature a high heat-resistance as well as high thermal and mechanical characteristics. The method according to the present invention makes it possible to prepare poly(arylate-sulphones) on existing commercial plants producing polyarylates without any changes in the process scheme.

Poly/arylate-sulphones/and method of preparing same

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Moscow, Russia

Petr Maximilianovich Valetsky