Process for preparing polyhydroxy acid ester micro capsule
Title：
Process for preparing polyhydroxy acid ester micro capsule
Application Number：
 200410068846
Application Date：
 2004/07/09
Announcement Date：
 2005/03/02
Pub. Date：
Publication Number：
 1586709
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 B01J 13/14
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Tan Fengping, Ding Fuxin, Jiang Guoqiang
Key Words：
 preparing process, polyhydroxy acid ester, micro capsule
Abstract：
 The preparation process of polyhydroxy acid ester microcapsule features the microcapsule material of hydroxy acid ester polymer, copolymer or mixture and includes the following steps: adding the matter to be encapsulated into hydroxy acid ester polymer solution of 2-20 % concentration to form suspension; adding non-solvent, which does not dissolve the encapsulated matter and hydroxy acid ester polymer, in the 2-5 times volume of solvent for completely dissolving the hydroxy acid ester polymer material under the room temperature and stirring condition to form microcapsule; adding non-solvent in the same volume to solidify microcapsule; and adding optional supplementary material, such as surfactant, anti-sticking agent, modifier and stabilizer. The present invention has the features of simple technological process, easy control, high yield and high encapsulating rate.
Claim：
Priority：
PCT：
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







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