Method for preparing biodegradable microcapsules and microcapsules thus obtained
US11654410B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 16, 2020 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Aug 12, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D101/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for manufacturing microcapsules containing an active substance, the method including: providing an aqueous solution of a surfactant, an oily phase comprising the active substance and a first monomer, and a polar phase comprising a second monomer; preparing an oil-in-water emulsion by adding the oily phase to the aqueous solution of the surfactant; adding the polar phase to the oil-in-water emulsion, in order to obtain a polymer in a reaction mixture, by polymerization of the first monomer and the second monomer; isolating the microcapsules, including a wall formed by the polymer and containing the active substance, from the reaction mixture; wherein the polymer is a poly(beta-amino ester). Microcapsules obtained by the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.