The interesterification reaction of the ethyl (I) and isopropyl (II) ethers of sulphoimides of saccharin-5and -6-carboxylic acids with glycerine has been studied. The corresponding 2-hydroxypropyl-1,3-bisesterosulphoimides of saccharin-5-and-6-carboxylic acids have been synthesized. They have been characterized by elemental analysis and method of the IR spectroscopy. It has been elucidated that in use of 10% PbO catalyst per mass of glycerine a yield of purposeful product reaches its greatest value -82 and 85% depending on used saccharin: (-5-) or (-6-).
For the production of heat-resistant epoxyimide oligomers with high physicochemical properties, it is of practical interest to modify bisphenol-A epoxy resins with diimides of aromatic acids [1, 2]. The high activity of epoxy groups in epoxy-bisphenol A resins in relation to different proton donors makes it possible to introduce imide groups into them. After appropriate curing, both by epoxy groups and by hydroxyl groups formed as a result of the reaction, ordered structures with the prescribed properties are formed. The present paper gives the results of the modifi cation of epoxy resin ED-20 with imides of 2-sulphoterephthalic acid (I) and 4-sulphoisophthalic acid (II) below. The interaction of epoxy resin with modifi ers I and II, depending on their ratios, proceeds by the COOH and by the NH group respectively, with the formation of monoepoxide (III) and diepoxide (IV) as shown.
ABSTRACT:A new chlorocarbonylimide of disaccharindicarboxylic acid was synthesized by condensation of imides of saccharin-6-carboxylic acid with alkyl-and alkylaryl bishalogenides. Poly(ester sulfoimide), soluble in organic solvents, was synthesized by polycondensation of chlorocarbonylimide with bisphenol. DTA and TGA investigations have shown that poly(ester sulfoimide)s were stable at temperatures up to 300°C-345°C.
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