Polymer membrane and methods of manufacturing thereof
US11401390B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Mar 16, 2018 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | May 13, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/53
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This invention relates to a polymer membrane comprising a hydrogen bond donor polymer and a hydrogen bond acceptor polymer and to the use of such membrane as the shell of a capsule. The invention also relates to a method of manufacturing a polymer membrane comprising a step of contacting an aqueous phase comprising a first polymer, and an oil phase comprising a second different polymer; wherein one polymer is a hydrogen bond donor polymer and the other polymer is a hydrogen bond acceptor polymer. The invention also relates to a method of encapsulation comprising a step of manufacturing a polymer membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.