Forming microporous polymeric articles by solvent extraction...

Details Forming microporous polymeric articles by solvent extraction... Forming microporous polymeric articles by solvent extraction...

C - Chemistry, Metallurgy

08

J

18/1182, 18/19,

C08J 9/26 (2006.01)

Patent

CA 1315930

Title: POLYMERIC ARTICLES AND METHODS OF MANUFACTURE THEREOF Abstract Method for the preparation of an article from a blend of at least two molecularly compatible polymer, by treating the blend with a solvent which is a solvent for one of the polymers and a non-solvent for the other. The solvent can be re- moved while the article is restrained from undergoing substantial shrinkage, in which case a microporous article is ob- tained. Alternatively, the solvent can be removed while the article is permitted to shrink, In this case high shrinkage force (also referred to as recovery force) results which can be utilized to apply the article to a substrate. The final and intermedi- ate articles are novel. In a preferred embodiment, the invention provides a microporous article having an average pore size of about 0.005 microns to about 1 micron.

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