Method of forming polyelectrolyte complex capsules
US9919280B2 · kind B2 · utility
1Cited by
15References
35Claims
0Family size
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Key dates
| Filing date | Nov 3, 2015 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Sep 30, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/5026
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Polyelectrolyte complex microcapsules are prepared by a novel template- and surfactant-free method. The microcapsules are produced spontaneously by ultrasonically spraying a solution of complex into a hot water reservoir which enhances diffusion and relaxation of polymer. The size and wall thickness of microcapsules are precisely controlled. Encapsulation of polymers and nanoparticles by mixing them with polyelectrolyte solutions is demonstrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.