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8713180 
Journal Article 
Synthesis and characterization of bis-2-oxazolidones from aliphatic isocyanates and epoxides 
Sendijarevic, A; Sendijarehvic, V; Frisch, KC; Maljanovic, M; Sehovic, H 
1990 
28 
4 
119-123 
English 
In a previous paper, the synthesis of poly(2-oxazolidones) from aliphatic isocyanates was studied on the model reaction of butyl isocyanate and phenylglycidyl ether under different reaction conditions: temperature, type, and concentration of catalyst and type of solvent. This study showed that bis-2-oxazolidones synthesized from hexamethylene diisocyanate and phenylglycidyl ether as well from butyl isocyanate and diglycidyl ether of biphenol-A exhibited two separate peaks in the IR spectra in the area of absorption of the 2-oxazolidone carbonyl group, which can be attributed to the existence of 4- and 5-isomers in the structure of the bis-2-oxazolidones.