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Microcapsules made of chitin or of chitin derivatives containing a hydrophobic substance, in particular a sunscreen, and process for the preparation of such microcapsules
Microcapsules made of chitin or of chitin derivatives containing a hydrophobic substance, in particular a sunscreen, and process for the preparation of such microcapsules
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机译:由几丁质或含有疏水物质的几丁质衍生物制成的微囊,特别是防晒剂,以及制备这种微囊的方法
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摘要
Microcapsules involving a wall of chitin or chitin derivatives or of polyhydroxylated polyamines or one of their salts, with the wall sheathing a hydrophobic substance, are prepared by forming a hydrophobic phase emulsion of the hydrophobic substance in an aqueous phase containing an anionic surfactant capable of causing insolubilization of chitosan or chitosan derivatives or polyhydroxylated polyamines, mixing the emulsion with a chitosan or chitosan derivative or polyhydroxylated polyamine organic salt so as to cause the coacervation of the chitosan or the chitosan derivatives or the polyhydroxylated polyamines around the droplets of the hydrophobic phase, subjecting the chitosan or chitosan derivative or the polyhydroxylated polyamine coacervate to an acetylation or crosslinking reaction and recovering the microcapsules, and are applicable to cosmetic compositions incorporating sunscreens.
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