Carboxylated polymers of intrinsic microporosity (PIMs) with tunable gas transport properties
US8809488B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Mar 10, 2010 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Oct 28, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2371/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A film of a carboxylated polymer of formula (I): wherein the sum of x, y and z is an integer from 10 to 10,000 and degree of hydrolysis is 0.05 or greater provides gas separation materials in which the degree of hydrolysis may be used to tune the selectivity of the gases to an optimal required range. Such films may be prepared by casting a film of a polymer of formula (II): wherein n is an integer from 10 to 10,000, and hydrolyzing all or a portion of the —CN groups to form —COOH groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.