发明授权
- 专利标题: Preparation of anhydride copolymers
- 专利标题(中): 酸酐共聚物的制备
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申请号: US920724申请日: 1986-10-17
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公开(公告)号: US4789724A公开(公告)日: 1988-12-06
- 发明人: Abraham J. Domb , Robert S. Langer
- 申请人: Abraham J. Domb , Robert S. Langer
- 申请人地址: MA Cambridge
- 专利权人: Massachusetts Institute of Technology
- 当前专利权人: Massachusetts Institute of Technology
- 当前专利权人地址: MA Cambridge
- 主分类号: A61K9/20
- IPC分类号: A61K9/20 ; C08G67/00 ; C08G67/04
摘要:
A method for preparation of very pure anhydride copolymers with high yield. The anhydride copolymers, consisting of aromatic and aliphatic diacids are formed by melt condensation of individually prepared, pure, isolated prepolymers. The method of preparation is characterized by high yield, reproducibility, polymer purity and controlled composition, and is a short and convenient procedure. The polyanhydrides produced by the disclosed method are particularly well suited to biomedical applications requiring low levels of toxic or inflammatory contaminants and physical and mechanical properties which closely conform to manufacturing specifications.