PROCESS FOR PREPARING SPHERICAL POLYMERIC PARTICLES FOR COSMETIC APPLICATION
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United States of America Patent
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Sep 28, 2023
app pub date -
Jul 8, 2021
filing date -
Aug 12, 2020
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Abstract
A process for preparing spherical polymeric particles of polymers containing at least two fillers, dispersed in the polymer matrix wherein up to 50% of the weight of the particles is composed by fillers. The process comprises a melt-blending of a polymeric matrix containing the at least two fillers with a continuous phase that is not miscible with the polymeric matrix and an agent to form an emulsion. This emulsion is then extruded, cooled and a solvent of the continuous phase is added to recover the spherical particles. The fillers can provide different properties to the spherical particles which can be used, for example, for cosmetic applications, specifically for preventing and/or reducing the signs of skin ageing.
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