In order to synthesize new reactive monomers to obtain new heat-resistant polymers and epoxyimide resins, 2-hydroxypropyl-1,3-bis-hydroxyethylester-sulphoimide and 2-hydroxypropyl-1,3-bis-carboxy-me¬thylester-sulphoimide of saccharin-6-carboxylic acid were synthesized. Monomers were synthesized based on 2-hydroxypropyl-1,3-bis-ester-sulphoimide of saccharin-6-carboxylic acid. The resulting products were characterized by elemental analysis and IR spectroscopy. The yield of target products was 83% and 78.6%, respectively. It was found that the synthesized compounds are readily soluble in polar aprotic solvents

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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