发明名称 |
Preserving compositions containing chitosan and processes for making water soluble O-acetylated chitosan and chitosan |
摘要 |
The present invention is directed to a pharmaceutical preserving composition comprising: (a) at least one chitosan or chitosan derivative and (b) at least one buffer solution, as well as methods of preserving contact lens solutions and disinfecting contact lens using such composition. The present invention is further directed to a method of preparing O-acetylated chitosan or chitosan derivatives comprising the steps of dissolving the chitosan or chitosan derivative into an aqueous acidic solution and reacting the chitosan or chitosan derivative with an acetylating agent in the presence of a phase transfer reagent.
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申请公布号 |
US2002018732(A1) |
申请公布日期 |
2002.02.14 |
申请号 |
US20010838528 |
申请日期 |
2001.04.19 |
申请人 |
HUNG WILLIAM M.;BERGBAUER KATRINA L.;SU KAI C.;WANG GUIGUI |
发明人 |
HUNG WILLIAM M.;BERGBAUER KATRINA L.;SU KAI C.;WANG GUIGUI |
分类号 |
A61K9/00;A61K47/36;A61L12/14;C08L5/08;(IPC1-7):A61L12/08 |
主分类号 |
A61K9/00 |
代理机构 |
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地址 |
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