| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing carbamate (especially polycarbamate such as biscarbamate) having no problems possessed by known methods for producing carbamate, as the known methods have several problems, that is, problems of materials (material properties such as irritation and toxicity, and use of a base), problems of reaction conditions (reaction at a high temperature or a high pressure), problems of reactivity of amine, problems of byproducts, problems of separation of objective products, problems of catalysts and reaction rate, and problems of corrosion, so, to provide a method for producing carbamate (especially polycarbamate such as biscarbamate) from a diaryl carbonate and an amine (especially an aromatic polyamine or a three-dimensionally bulky polyamine) having≥2 amino groups having at least one H at N site, wherein the carbamate can be produced at a high reaction rate and a high productivity on a mild condition whith side reactions suppressed and the objective carbamate can be efficiently obtained by easily separating the produced carbamate. SOLUTION: The method for producing carbamate comprises reacting a diaryl carbonate with an amine having≥2 amino groups having at least one H at N site in the presence of an aliphatic carboxylic acid, a carbocyclic aromatic carboxylic acid or a heterocyclic carboxylic acid at 10-150°C. COPYRIGHT: (C)2007,JPO&INPIT
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