Synthesis of epoxide – oxazolidone oligomers
The course of reaction of bisphenol A-glycidyl oligomers with cyanuric acid in the molten state at temperatures above 120°C has been investigated. It has been found that under these conditions contrary to expectation s-triazine derivatives are not formed, but linear oligomers with oxazolidone rings in the chain are. This structure has been eon- firmed by means of 1H-NMR- and 13C-NMR-spectra. The reaction mechanism has been. explained by assuming the transient formation of isocyanic acid in the reaction mixture.
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