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公开(公告)号:US5914428A
公开(公告)日:1999-06-22
申请号:US560517
申请日:1995-11-16
申请人: Toyokazu Yagii , Teruo Itokazu , Kenji Oka , Yasutaka Tanaka , Hidetaka Kojima , Kiyokazu Murata
发明人: Toyokazu Yagii , Teruo Itokazu , Kenji Oka , Yasutaka Tanaka , Hidetaka Kojima , Kiyokazu Murata
IPC分类号: C07C68/00 , C07C263/04 , C07C265/10 , C07C265/14 , C07C269/04 , C07C263/00 , C07C261/00
CPC分类号: C07C269/04 , C07C263/04 , C07C68/005 , C07C2101/12
摘要: An aliphatic diisocyanate compound is prepared in a high yield by reacting dimethyl carbonate with an aliphatic diamine in the presence of an alkali catalyst to produce a corresponding urethane compound; and, within 48 hours after the completion of the preparation of the urethane compound, thermally decomposing the urethane compound under a reduced pressure of 1 to 700 Torr in a high-boiling-point solvent.
摘要翻译: 通过在碱催化剂的存在下使碳酸二甲酯与脂族二胺反应,以高收率制备脂族二异氰酸酯化合物,生成相应的氨基甲酸酯化合物; 在氨基甲酸酯化合物的制备完成后48小时内,在高沸点溶剂中,在1〜700乇的减压下热分解氨基甲酸酯化合物。
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公开(公告)号:US5789614A
公开(公告)日:1998-08-04
申请号:US940364
申请日:1997-09-30
申请人: Toyokazu Yagii , Teruo Itokazu , Kenji Oka , Yasutaka Tanaka , Hidetaka Kojima
发明人: Toyokazu Yagii , Teruo Itokazu , Kenji Oka , Yasutaka Tanaka , Hidetaka Kojima
IPC分类号: C07C269/04 , C07C263/00
CPC分类号: C07C269/04
摘要: An aliphatic diisocyante compound is prepared in a high yield by reacting dimethyl carbonate with an aliphatic diamine in the presence of an alkali catalyst to produce a corresponding urethene compound; and, within 48 hours after the completion of the preparation of the urethane compound, thermally decomposing the urethane compound under a reduced pressure of 1 to 700 Torr in a high-boiling-point solvent.
摘要翻译: 通过在碱催化剂的存在下使碳酸二甲酯与脂肪族二胺反应,以高产率制备脂族二异氰酸酯化合物,生成相应的脲基化合物; 在氨基甲酸酯化合物的制备完成后48小时内,在高沸点溶剂中,在1〜700乇的减压下热分解氨基甲酸酯化合物。
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公开(公告)号:US5773643A
公开(公告)日:1998-06-30
申请号:US358680
申请日:1994-12-19
申请人: Toyokazu Yagii , Teruo Itokazu , Kiyokazu Murata
发明人: Toyokazu Yagii , Teruo Itokazu , Kiyokazu Murata
IPC分类号: C07C68/00 , C07C263/04 , C07C265/10 , C07C263/00
CPC分类号: C07C263/04 , C07C68/005 , C07C2101/12
摘要: A diisocyanate compound substantially free from chlorine is prepared by the following consecutive steps (1), (2) and (3): (1) preparing dimethyl carbonate by a method selected from: (a) a method wherein carbon monoxide and oxygen are reacted with methanol, (b) a method wherein propylene oxide is reacted with carbon dioxide to prepare propylene carbonate, and then, the propylene carbonate is reacted with methanol, and (c) a method wherein a nitrous acid ester is catalytically reacted with carbon monoxide; (2) reacting the dimethyl carbonate with an aliphatic diamine in the presence of an alkali catalyst to prepare a corresponding urethane compound; and (3) thermally decomposing the urethane compound under a reduced pressure of 1 to 700 Torr in a high-boiling point solvent.
摘要翻译: 通过以下连续步骤(1),(2)和(3)制备基本上不含氯的二异氰酸酯化合物:(1)通过选自以下的方法制备碳酸二甲酯:(a)一氧化碳和氧气反应的方法 (b)使环氧丙烷与二氧化碳反应制备碳酸丙烯酯的方法,然后使碳酸亚丙酯与甲醇反应,和(c)亚硝酸酯与一氧化碳催化反应的方法; (2)在碱催化剂存在下使碳酸二甲酯与脂肪族二胺反应,制备相应的氨基甲酸酯化合物; 和(3)在高沸点溶剂中在1〜700托的减压下热分解氨基甲酸酯化合物。
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