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US 5,851,517 AGranted
Composition including a dispersion of polymer particles in a non-aqueous medium
AssigneeL'oreal
InventorsNathalie Mougin, Jean Mondet
Life of this patent
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Abstract
The invention relates to the use of a dispersion of surface-stabilized polymer particles in a non-aqueous medium, in a cosmetic, hygiene or pharmaceutical composition. Moreover, the invention also relates to compositions comprising the above-mentioned dispersion of polymer particles.
Claims22
A composition comprising, in a cosmetically, pharmaceutically and/or hygienically acceptable medium,
- a dispersion of surface-stabilized polymeric particle in a non-aqueous medium, wherein said particles
- are particles of at least one polymer formed from monomers and
- are stabilized at their surface by at least one stabilizer
- wherein
- a) said non-aqueous medium comprises at least one non-aqueous liquid compound wherein said non-aqueous liquid compound is:
- a non-aqueous liquid compound having a global solubility parameter, according to the Hansen solubility space, of less than 17 (MPa).sup.1/2, and
- a monoalcohol having a global solubility parameter, according to the Hansen solubility space, of less than or equal to 20 (MPa).sup.1/2,
- or a mixture thereof,
- and
- b) (i) when said non-aqueous medium comprises at least one non-aqueous liquid compound which is a silicone oil, said at least one stabilizer is a sequential or grafted block copolymer, or a mixture thereof, comprising at least one block of polyorganosiloxane structure and at least one block of a radical polymer or of a polyether or of a polyester, and
- (ii) when said non-aqueous medium comprises at least one non-aqueous liquid compound which is not a silicone oil, said at least one stabilizer is:
- (A) a sequential or grafted block copolymers, or a mixture thereof, comprising at least one block of polyorganosiloxane structure and at least one block of a radical polymer or of a polyether or of a polyester,
- (B) a copolymer of acrylates or methacrylates of C.sub.1 -C.sub.4 alcohols, or of acrylates or methacrylates of C.sub.8 -C.sub.30 alcohols,
- (C) a sequential or grafted block copolymer, or a mixture thereof, comprising at least one block resulting from the polymerization of dienes, which is optionally hydrogenated, and at least one block of at least one polymer wherein said at least one polymer is a vinyl or acrylic polymer, polyether, or polyester;
- or a mixture thereof.
12 more elements
A method of preparing a cosmetic, hygiene or pharmaceutical composition, comprising the step of including in said composition at least one dispersion of surface-stabilized polymeric particles in a non-aqueous medium, wherein said particles are particles of at least one polymer formed from monomers and are stabilized at their surface by at least one stabilizer, and further wherein
- a) said non-aqueous medium comprises at least one non-aqueous liquid compound wherein said non-aqueous liquid compound is:
- a non-aqueous liquid compound having a global solubility parameter, according to the Hansen solubility space, of less than 17 (MPa).sup.1/2,
- or a monoalcohol having a global solubility parameter, according to the Hansen solubility space, of less than or equal to 20 (MPa).sup.1/2,
- or a mixture thereof,
- and
- b) (i) when said non-aqueous medium comprises at least one non-aqueous liquid compound which is a silicone oil, said at least one stabilizer is a sequential or grafted block copolymer, or a mixture thereof, comprising at least one block of polyorganosiloxane structure and at least one block of a radical polymer or of a polyether or of a polyester,
- (ii) when said non-aqueous medium comprises at least one non-aqueous liquid compound which is not a silicone oil, said at least one stabilizer is:
- (A) a sequential or grafted block copolymer, or a mixture thereof comprising at least one block of polyorganosiloxane structure and at least one block of a radical polymer or of a polyether or of a polyester,
- (B) a copolymer of acrylates or methacrylates of C.sub.1 -C.sub.4 alcohols, or of acrylates or methacrylates of C.sub.8 -C.sub.30 alcohols,
- (C) a sequential or grafted block copolymer, or mixture thereof comprising at least one block resulting from the polymerization of dienes, which is optionally hydrogenated, and at least one block of at least one polymer wherein said at least one polymer is a vinyl or acrylic polymer, polyether, polyester, or a mixture thereof.
7 more elements
Dependencies are inferred from the claim text.