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    • 38. 发明公开
    • 이소시아네이트의 제조 방법
    • 生产异氰酸酯的方法
    • KR1020090028824A
    • 2009-03-19
    • KR1020097002567
    • 2007-11-16
    • 아사히 가세이 케미칼즈 가부시키가이샤
    • 시노하타,마사키미야케,노부히사
    • C07C263/04C07C265/14C07C271/44C07C271/56
    • C07C263/04C07C265/14C07C269/06C07C2601/14C07C271/52C07C271/56
    • Disclosed is a method for stably producing an isocyanate with high yield for a long time without using phosgene. This method for producing an isocyanate does not cause the problems involved in the prior art. Specifically disclosed is a method for producing an isocyanate, which comprises a step wherein a carbamic acid ester is reacted with an aromatic hydroxy compound, thereby obtaining an aryl carbamate having a group derived from the aromatic hydroxy compound, and a step wherein the aryl carbamate is subjected to a decomposition reaction. This method for producing an isocyanate is characterized in that the aromatic hydroxy compound is anaromatic hydroxy compound represented by the formula (1) below, which has a substituent R1 at at least one ortho-position of the hydroxyl group. (In the formula, ring A represents an optionally substituted monocyclic or heterocyclic aromatic hydrocarbon ring having 6-20 carbon atoms; R1 represents a group other than a hydrogen atom, which is an aliphatic alkyl group having 1-20 carbon atoms, an aliphatic alkoxy group having 1-20 carbon atoms, an aryl group having 6-20 carbon atoms, an aryloxy group having 6-20 carbon atoms, an aralkyl group having 7-20 carbon atoms or an aralkyloxy group having 7-20 carbon atoms, each containing an atom selected from a carbon atom, an oxygen atom and a nitrogen atom; and R1 and A may combine together to form a ring structure.)
    • 公开了长时间不用光气稳定地生产异氰酸酯的方法。 该异氰酸酯的制造方法不会引起现有技术的问题。 具体公开了异氰酸酯的制造方法,其包括使氨基甲酸酯与芳香族羟基化合物反应的步骤,从而得到具有来自芳香族羟基化合物的基团的氨基甲酸芳基酯,以及其中氨基甲酸芳基酯为 进行分解反应。 该异氰酸酯的制造方法的特征在于,所述芳香族羟基化合物为下述通式(1)所示的芳族羟基化合物,其在羟基的至少一个邻位具有取代基R 1。 (式中,环A表示具有6〜20个碳原子的任选取代的单环或杂环芳香烃环; R 1表示除氢原子以外的基团,其为具有1-20个碳原子的脂肪族烷基,脂肪族烷氧基 具有1-20个碳原子的基团,具有6-20个碳原子的芳基,具有6-20个碳原子的芳氧基,具有7-20个碳原子的芳烷基或具有7-20个碳原子的芳烷氧基,每个含有 选自碳原子,氧原子和氮原子的原子; R 1和A可以结合在一起形成环结构。)