Invention Grant
US3669928A Process for the production of high molecular weight polybenzoxazinones
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用于生产高分子量聚苯并恶嗪酮的方法
- Patent Title: Process for the production of high molecular weight polybenzoxazinones
- Patent Title (中): 用于生产高分子量聚苯并恶嗪酮的方法
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Application No.: US3669928DApplication Date: 1970-06-26
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Publication No.: US3669928APublication Date: 1972-06-13
- Inventor: LORENZ GUNTER , GALLUS MANFRED , GIESSLER WOLFGANG , NISCHK GUNTHER
- Applicant: BAYER AG
- Assignee: Bayer Ag
- Current Assignee: Bayer Ag
- Priority: DE1933212 1969-07-01
- Main IPC: C08G73/00
- IPC: C08G73/00 ; C08G73/06 ; C08G20/20 ; C08G30/02
Abstract:
Improvement in the production of high molecular weight polybenzoxazinones from bis-anthranilic acid derivatives and dicarboxylic acid dihalides followed by ring closure of the polyamidocarboxylic acid obtained, wherein ring closure is effected by a liquid or dissolved dehydrating agent in an organic solvent.
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