Methods, compositions, and kit for whitening hyper pigmented spots on skin
AssigneeELC Management LLC
InventorsWeilin Mu, John R. Castro
Life of this patent
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Abstract
A skin whitening composition comprising a liquid polymeric coating material that, upon exposure to ambient air and moisture in skin, hardens to a water resistant, water vapor permeable, adherent and conformable solid film when applied to skin, and at least one skin whitening active; and a method and kit for whitening skin.
Claims8
A method for whitening discrete hyper pigmented spots on skin by applying to the discrete spots in need of whitening and not to the surrounding non-hyper-pigmented skin a liquid pigmented treatment composition comprising at least one skin whitening active;
- from 1-35% of a polymeric coating material comprising a composite polymer that is the reaction product of a silanol endblocked polydimethyl siloxane and a silicate resin;
- from 1-50% of a volatile solvent selected from isododecane, isohexadecane, dimethicone, cyclomethicone, and mixtures thereof;
- from 1-50% of a non-volatile silicone oil having a viscosity ranging from 20 to 200,000 cst at room temperature;
- from 0.1-40% of a silicone surfactant;
- and from 0.5 to 65% titanium dioxide in combination with pigments;
- wherein the composition upon exposure to ambient air and moisture in skin, hardens to a water resistant, water vapor permeable, conformable solid film and remain unchanged in adherence to the spots for 24 to 48 hours after application and is thereafter applied to the spots every 12 to 72 hours to color the spots to shade match them to the surrounding untreated skin while whitening the treated spots over time while the pigmentation of the untreated surrounding non-hyperpigmented spots remains unchanged.
A kit for whitening discrete hyper pigmented spots on the skin comprising:
- a receptacle having a closure with a cap and extending rod having affixed at the distal end a deformable pinpoint applicator with an application surface of a size that permits application of a treatment composition to discrete hyperpigmented spots on the skin and not surrounding non-hyperpigmented skin, and stored within the receptacle a treatment composition comprising (a) at least one skin whitening agent in a liquid polymeric coating material comprising:
- from 1-35% of a polymer which is the reaction product of a silanol endblocked polydimethylsiloxane and a silicate resin,
- from 1-50% of a volatile solvent,
- from 1-50% of a non-volatile silicone oil;
- and
- from about 0.1 to 40% of a silicone surfactant
- that, upon exposure to ambient air and moisture in skin, will harden to a water resistant, water vapor permeable, adherent and conformable solid film when applied to skin, wherein the adherence of the treatment composition to the spots on the hands remains unchanged for one day after application.
Dependencies are inferred from the claim text.