Microporous articles and corresponding formation methods
AssigneeSolvay Specialty Polymers USA, LLC
InventorsEmanuele Di Nicolo', Dario Aurilia, Jason Rich, Kelly D. Branham
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Abstract
This invention relates to certain microporous articles comprising certain PEDEK-PEEK copolymers, to a method for making said microporous articles, in particular to a method of making microporous articles from a blend comprising said PEDEK-PEEK copolymer and at least one additional polymer, comprising processing said blend into a film and treating the film with a solvent for obtaining the microporous article.
Claims20
A microporous article comprising at least one polyaryl ether ketone copolymer [copolymer (PEDEK-PEEK)] comprising:
- recurring units (RPEEK) of formula (I):
- and
- recurring units (RPEDEK) of formula (II):
- wherein in above formulae (I) and (II), each of R′ and R″, equal to or different from each other, is independently selected at each occurrence from a C1-C12 group optionally comprising one or more than one heteroatoms;
- sulfonic acid and sulfonate groups;
- phosphonic acid and phosphonate groups;
- amine and quaternary ammonium groups;
- each of j′ and k″, equal to or different from each other, is independently selected at each occurrence from 0 and an integer of 1 to 4;
- wherein the said recurring units are comprised in a molar ratio (RPEDEK):(RPEEK) of 55:45 to 99:1,
- said microporous article having a mean flow pore diameter (MFD), as determined according to ASTM F316-03, of at least 0.005 to at most 0.500 μm.
The microporous article of claim 3, said article possessing a gravimetric porosity (εm) of 20 to 95% v/v.
Dependencies are inferred from the claim text.