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Shine-Imparting, Hydrating Lipstick Patented by L’Oréal

January 1, 2014

US Patent No. 8,597,621 B2; L’Oréal has patented an emulsion lipstick composition, in solid form, comprising water; a water-insoluble half acid and half amide crosslinked reaction product of at least one oil-soluble high carbon polar modified polymer comprising at least one C22-C40 monomer and modified with at least one hydrophilic unit, and having a weight-average molecular weight of less than or equal to 30000 g/mol and a crystallinity of 8-60% and at least one polyamine, wherein the reaction product forms a matrix capable of entrapping water; at least one non-volatile solvent capable of solubilizing the oil-soluble high carbon polar modified polymer; and at least on high melting point wax. The water is entrapped within the matrix.
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