Abstract
AbstractOligoureas with diisocyanato end groups (6a – f) were transformed into the respective parabanic acid derivatives (7a – f) with the aid of oxalyl chloride (2). In the reaction of 2 with certain diurea model compounds (12) in 1,2‐dichloroethane at room temperature besides the corresponding parabanic acids, diurea dihydrochlorides were formed. Their solutions in 1,2‐dichloroethane exhibit electrical conductivity. IR spectra confirm their structure. The reaction of the α,ω‐diisocyanatopoly(parabanic acid)s with diols (8a – e) led to copolymers and block copolymers, poly(urethane‐parabenic acid)s. The experimental conditions and the influence of the structure of the polymers on certain properties of the final products were investigated.
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