ピペラジン誘導体からポリウレタンの合成

抄録

Polyurethanes containing piperazine rings were synthesized from piperazine derivatives and diols. Diethyl piperazine-N, N'-dicarboxylate failed to give polymers, diphenyl piperazine-N, N'-dicarboxylate gave polymers of low molecular weight. Interfacial polycondensation between piperazine-N, N'-dicarbonyl chloride and diols gave polyurethaneureas, whereas melt polycondensation afforded polyurethanes. The polyurethanes derived from piperazine-N, N'-dicarbonyl chloride and Bisphenol A showed a m.p. of 278°C. It is insoluble in formic acid, chloroform, 2N sulfuric acid, 2N sodium hydroxide. It, however, is soluble in m-cresol.