发明名称 |
Process for producing polymer |
摘要 |
A process for producing a biodegradable polymer having free carboxyl at the omega -end charcterized by polymerizing a cyclic ester compound in the presence of a hydroxymonocarboxylic acid derivative having protected carboxyl or a hydroxydicarboxylic acid derivative having protected carboxyl, and then deprotecting the thus obtained polymer having protected carboxyl at the omega -end. Use of the above process makes it easy to control the molecular weight of the target biodegradable polymer and the content of free carboxyl therein, thereby enabling the efficient production of a polymer having a high purity and being contaminated with littel catalyst remaining therein. |
申请公布号 |
AU1797800(A) |
申请公布日期 |
2000.07.03 |
申请号 |
AU20000017978 |
申请日期 |
1999.12.14 |
申请人 |
TAKEDA CHEMICAL INDUSTRIES LTD. |
发明人 |
YOSHIO HATA;YASUTAKA IGARI |
分类号 |
A61K9/113;A61K9/16;A61K47/34;C08G63/08 |
主分类号 |
A61K9/113 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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