A process for the production of a carbodiimide, comprising the steps of:
(1) reacting an amine represented by the following formula
(A) with carbon disulfide in the presence of a catalyst at a reaction temperature of 50 to 150° C. to obtain a thiourea represented by the following formula (B):
(In the above formula (A), R is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.)
(In the above formula (B), R is as defined in the above formula (A).;
(2) desulfurizing the obtained thiourea with a hypochlorite in the presence of a basic compound to obtain a carbodiimide represented by the following formula (C):
(In the above formula (C), R is as defined in the above formula (A).); and
(3) purifying the obtained carbodiimide.
生产碳二
亚胺的方法,包括以下步骤:
(1) 在反应温度为50至150°C的条件下,在催化剂存在下,将由以下式表示的胺(A)与
二硫化碳反应,以获得由以下式表示的
硫脲(B):
(在上述式中,R是氢原子或具有1至6个碳原子的烷基基团。)
(在上述式(B)中,R如上述式(A)中所定义。)
(2) 在碱性化合物存在下,用
次氯酸盐脱
硫获得的
硫脲,以获得由以下式表示的碳二
亚胺(C):
(在上述式(C)中,R如上述式(A)中所定义。);以及
(3) 纯化获得的碳二
亚胺。