Topical compositions with an oily outer phase and process for their preparation
AssigneeSeppic
InventorsChantal Amalric, Alicia Roso, Nelly Michel, Guy Tabacchi
Life of this patent
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Abstract
A topical composition containing one oily outer phase and two aqueous inner phases, one of which is a gel and a process for its preparation. In a preferred embodiment, the topical composition is a sunscreen emulsion containing one or more sunscreen filter substances.
Claims19
A topical sunscreen composition, comprising a three-phase emulsion consisting essentially of at least one sunscreen filter, an emulsifier, one oily outer phase and two aqueous inner phases, one of said inner phases being a gel having a viscosity greater than 2000 cPs, as measured on a Brookfield LV at 6 rpm, and said at least one sunscreen filter being contained in at least one of said phases,
- wherein the gel phase comprises a polymer selected from the group consisting of homopolymers and copolymers of acrylic acid, acrylic acid derivatives, acrylamide, and acrylamidomethanepropanesulfonic acid, and
- wherein the oily outer phase comprises an oil in an amount of at least 2% and at most 20% by weight of the topical sunscreen composition.
A process for the manufacture of a sunscreen composition comprising a three-phase emulsion consisting essentially of at least one sunscreen filter, an emulsifier, one oily outer phase and two aqueous inner phases, one of said inner phases being a gel having a viscosity greater than 2000 cPs, as measured on a Brookfield LV at 6 rpm, and said at least one sunscreen filter being contained in at least one of said phases,
- wherein the gel phase comprises a polymer selected from the group consisting of homopolymers and copolymers of acrylic acid, acrylic acid derivatives, acrylamide, and acrylamidomethanepropanesulfonic acid, and
- wherein the oily outer phase comprises an oil in an amount of at least 2% and at most 20% by weight of the sunscreen composition,
- comprising the step of mixing a primary water-in-oil emulsion with an aqueous gel.
Dependencies are inferred from the claim text.