发明名称 |
Microencapsulation process using supercritical fluids |
摘要 |
The present invention comprises a method for microencapsulating a core material comprising the steps of a) mixing a core material with an encapsulating polymer, b) supplying a supercritical fluid capable of swelling the polymer to the mixture under a temperature and a pressure sufficient to maintain the fluid in a supercritical state, c) allowing the supercritical fluid to penetrate and liquefy the polymer while maintaining temperature and pressure sufficient to maintain the fluid in a supercritical state, and d) rapidly releasing the pressure to solidify the polymer around the core material to form a microcapsule. This method requires neither that the polymer nor core materials to be soluble in the supercritical fluid and can be used to rapidly and efficiently microencapsulate a variety of materials for a variety of applications.
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申请公布号 |
US5766637(A) |
申请公布日期 |
1998.06.16 |
申请号 |
US19960727154 |
申请日期 |
1996.10.08 |
申请人 |
UNIVERSITY OF DELAWARE |
发明人 |
SHINE, ANNETTE DUDOK;GELB, JR., JACK |
分类号 |
A61K9/50;A01N25/28;A61K9/00;A61K9/16;A61K39/00;A61K39/12;B01J3/00;B01J13/02;B01J13/04;C05G5/00;C09B67/08;C09D11/00;C09J201/00;(IPC1-7):A61K9/58 |
主分类号 |
A61K9/50 |
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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