Invention Grant
- Patent Title: Synthesis of polybenzoxasole and polybenzothiazole precursors
- Patent Title (中): 聚苯并恶唑和聚苯并噻唑前体的合成
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Application No.: US988023Application Date: 1997-12-10
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Publication No.: US5883221APublication Date: 1999-03-16
- Inventor: Recai Sezi , Eberhard Kuehn , Hellmut Ahne , Sueleyman Kocman
- Applicant: Recai Sezi , Eberhard Kuehn , Hellmut Ahne , Sueleyman Kocman
- Applicant Address: DEX Munchen
- Assignee: Siemens Aktiengesellschaft
- Current Assignee: Siemens Aktiengesellschaft
- Current Assignee Address: DEX Munchen
- Priority: DEX19651539.4 19961112
- Main IPC: C07C209/44
- IPC: C07C209/44 ; C07C211/05 ; C08G63/685 ; C08G63/82 ; C08G73/22 ; C08G75/32 ; C08G65/40 ; C08G63/00
Abstract:
In a method of synthesis of polybenzoxazole and polybenzothiazole precursors, a dicarboxylic acid or a dicarboxylaic acid ester is reacted with a bis-o-aminophenol or bis-o-aminothiophenol in a suitable solvent in the presence of an activating reagent having the following structure: ##STR1##
Public/Granted literature
- US6077836A Peritoneal dialysis and compositions for use therein Public/Granted day:2000-06-20
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