发明授权
- 专利标题: Process for the preparation of aromatic mono- and polyisocyanates
- 专利标题(中): 制备芳族单和多异氰酸酯的方法
-
申请号: US266607申请日: 1988-11-03
-
公开(公告)号: US4871871A公开(公告)日: 1989-10-03
- 发明人: Edward T. Shawl , Haven S. Kesling, Jr.
- 申请人: Edward T. Shawl , Haven S. Kesling, Jr.
- 申请人地址: DE Wilmington
- 专利权人: Arco Chemical Technology, Inc.
- 当前专利权人: Arco Chemical Technology, Inc.
- 当前专利权人地址: DE Wilmington
- 主分类号: C07C263/06
- IPC分类号: C07C263/06
摘要:
An improved process is provided for the preparation of aromatic mono- and poly- isocyanates by the thermal decomposition of an aromatic bis dialkyl urea in solvent in the presence of a tertiary amine hydrohalide, such as pyridine hydrochloride, as a promoter for conversion of the urea groups to isocyanates.
公开/授权文献
- US4435296A Lubricating grease 公开/授权日:1984-03-06
信息查询