发明授权
US4879410A Preparation of primary aralkyl urethanes and ureas and isocyanates
derived therefrom
失效
制备主要的芳烷基氨基甲酸酯和脲以及衍生自其的异氰酸酯
- 专利标题： Preparation of primary aralkyl urethanes and ureas and isocyanates derived therefrom
- 专利标题（中）： 制备主要的芳烷基氨基甲酸酯和脲以及衍生自其的异氰酸酯
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申请号： US926070申请日： 1986-11-03
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公开(公告)号： US4879410A公开(公告)日： 1989-11-07
- 发明人: Balwant Singh , Laurence W. Chang , William A. Henderson, Jr.
- 申请人： Balwant Singh , Laurence W. Chang , William A. Henderson, Jr.
- 申请人地址： CT Stamford
- 专利权人： American Cyanamid Company
- 当前专利权人： American Cyanamid Company
- 当前专利权人地址： CT Stamford
- 主分类号： C07D205/085
- IPC分类号： C07D205/085 ; B01J27/02 ; B01J27/06 ; B01J27/16 ; B01J31/02 ; B01J31/10 ; C07B61/00 ; C07C67/00 ; C07C239/00 ; C07C271/08 ; C07C271/10 ; C07C271/32 ; C07C271/40 ; C07C271/60 ; C07C275/24 ; C07D205/08 ; C07D207/27 ; C07D207/452 ; C07D211/76 ; C07D223/10 ; C08G18/75 ; C08G18/76
摘要：
A process is disclosed for the preparation of aralkyl mono- and diurethanes or ureas by carbamylmethylation, or acid-catalyzed addition at a temperature of 40.degree. C. to about 100.degree. C. of formaldehyde and esters of carbamic acid to aromatic hydrocarbons. Aralkyl carbamates and ureas formed by this process can be cracked directly to produce aralkyl diisocyanates, or hydrogenated and then cracked to produce aliphatic diisocyanates, or reacted directly with polyols to produce polyurethanes by functioning as blocked isocyanates.
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