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Title:
PERMEABLE COMPOSITIONS AND METHODS FOR THEIR PREPARATION
Document Type and Number:
WIPO Patent Application WO1999032204
Kind Code:
A3
Abstract:
The present invention involves compositions having variable permeation and/or porosity and objects made therefrom. The compositions are prepared by dispersing a pore-forming agent in a polymer matrix by agitation. The composition is density developed resulting in a variable concentration in pore-forming agent throughout the mixture through application of an external force on the mixture with or without continued agitation. The pore-forming agent is then leached from the mixture to form a polymer matrix having variable permeability and/or porosity.

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Inventors:
AGRAWAL C MAULI
ATHANASIOU KYRIACOS A
Application Number:
PCT/US1998/027351
Publication Date:
September 23, 1999
Filing Date:
December 22, 1998
Export Citation:
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Assignee:
UNIV TEXAS (US)
International Classes:
A61L27/18; A61L27/56; B01D67/00; B01D69/02; B29C67/20; C08J9/26; C08J9/28; (IPC1-7): B01D67/00; B01D69/02; C08J9/26; A61L27/00
Foreign References:
US3923936A1975-12-02
US4659470A1987-04-21
US3968292A1976-07-06
US5460621A1995-10-24
US4177228A1979-12-04
Other References:
DATABASE WPI Section Ch Week 9236, Derwent World Patents Index; Class M22, AN 92-298375, XP002110811
PATENT ABSTRACTS OF JAPAN vol. 004, no. 068 (M - 012) 21 May 1980 (1980-05-21)
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