Composition and process for retaining active ingredients
View Patent ↗A composition for retaining active ingredients in personal care compositions is described based on one or more polymers having a network structure in an oil phase in amounts from 0.01 to 10% by weight based on the total weight of the composition in the oil phase, the polymers including at least one associative agent, the composition further including at least one active component. The oil phase viscosity of each composition is at least 10 poise under a shear stress up to 1000 dynes/cm 2 .
1. A process for retaining an active ingredient in a composition comprising: (a) polymerizing butyl acrylate, methacrylic acid, methyl methacrylate and cetyl-eicosyl methacrylate by aqueous emulsion polymerization to form a polymer having a network structure of 1.4% by weight of polymerized residues of methacrylic acid, 49% by weight of polymerized residues of butyl acrylate, 18.6% by weight of polymerized residues of methyl methacrylate and 31% by weight of polymerized residues of cetyl-eicosyl methacrylate and (b) combining the polymer and one or more active ingredients in an oil phase; wherein the polymer is present in the oil phase in an amount from 0.01 to 10% by weight based on the total weight of the composition.
2. The process of claim 1 in which said one or more active ingredients are selected from the group consisting of sunscreening actives, moisturizing actives, vitamins, folic acid derivatives, exfoliating agents, deodorizing actives, fragrances, cosmetic agents for personal care, hair conditioners, infrared (IR)-absorbing materials for personal care, acne medications and combinations thereof.