By polycondensation of 2-hydroxypropyl-1,3-bis-carboxymethylesterosulfoimide of saccharin-6- carboxylic acid with ethylene glycol, a thermostable polyhydroxyester was obtained. The structure of the synthesized compound was confirmed by data of the infrared spectroscopy and the thermal stability studied by a method of differential-thermal analysis on a derivatograph of “Paulik—Paulik Erdei” system. The derivatographic investigations showed that the synthesized polyhydroxyester had high thermal stability and physical-mechanical properties.
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