Open porous organic-inorganic composite powder, method for preparing same, and cosmetic composition containing same
US10507170B2 · kind B2 · utility
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Key dates
| Filing date | Sep 21, 2016 |
| Grant date | Dec 17, 2019 |
| Priority date | — |
| Expiry date | Dec 10, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q17/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention provides a method for preparing porous organic/inorganic composite powder which includes attaching inorganic oxide nanoparticles in a multi-layer form by repeating steps of attaching polyphenol to porous polymethyl methacrylate (PMMA) microspheres and attaching inorganic oxide nanoparticles to the porous polymethyl methacrylate (PMMA) microspheres to which polyphenol is attached, and a cosmetic composition including the porous organic/inorganic composite powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.