Non-irritating compositions
View Patent ↗The present invention provides a base composition that allows for the formulation of non-irritating cosmetic and/or dermatological compositions. The base composition includes one or more of electrolyte, buffer, mild preservative, lubricant, or any combinations thereof. It is preferred that one or more of the above components are eye-safe and/or eye-compatible. The present invention also provides photoprotective cosmetic and/or dermatological compositions that include the base composition and one or more sunscreen active components and are non-irritating to mammalian eyes.
1. A non-irritating photoprotective cosmetic composition comprising:
a water phase comprising a base composition having a buffer, an electrolyte, a mild preservative, and a lubricant; and
one or more sunscreen agents, present in an amount of 4 wt % to 35 wt %, based on the total weight of the photoprotective cosmetic composition, wherein said one or more sunscreen agents is selected from the group consisting of octyl methoxycinnamate, octyl salicylate, homosalate, titanium dioxide, and any combinations thereof,
wherein said base composition is present in an amount of 2 wt % to 4 wt %, based on the total weight of the photoprotective cosmetic composition,
wherein said buffer is present in an amount of 3 wt % to 10 wt %, based on the total weight of the base composition, and is selected from the group consisting of sodium acetate, sodium citrate, trisodium citrate, citric acid, sodium bicarbonate, sodium lactate, trisodium phosphate, disodium phosphate, sodium borate, boric acid, calcium fumarate, sodium succinate, tris-maleate, and any combinations thereof,
wherein said electrolyte is present in an amount of 30 wt % to 40 wt %, based on the total weight of the base composition, and is selected from the group consisting of sodium chloride, potassium chloride, magnesium chloride, disodium EDTA, and any combinations thereof,
wherein said mild preservative is present in an amount of 15 wt % and 28 wt %, based on the total weight of the base composition, and is selected from the group consisting of esters, phenols, phenoxyethanol, paraben, methyl paraben, butyl paraben, ethyl paraben, propyl paraben, isobutyl paraben, isopropyl paraben, polyquaternium-1, benzalkonium chloride, sorbic acid, potassium sorbate, polyaminopropyl biguanidine, diazolidinyl urea, and any combinations thereof,
wherein said lubricant is present in an amount of 35 wt % to 50 wt %, based on the total weight of the base composition, and is selected form the group consisting of is selected from the group consisting of polyols, glycerin, propylene glycol, polypropylene glycol, PEG-400, PEG-8, and any combinations thereof,
wherein the photoprotective cosmetic composition is non-irritating to a mammalian eye, and exhibits on a scale of 0 to 3 at least one of a bulbar conjunctiva irritation score of 0.4 or less and a palpebral conjunctiva score of 0.4 or less, wherein said bulbar conjunctiva irritation score and said palpebral conjunctiva score are measured 30 seconds after a drop of said photoprotective composition is instilled into the eye of a user.
2. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said water phase has an osmolarity between 175 mOsm/kg and 700 mOsm/kg.
3. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said water phase has a pH between 5.5 and 8.5.
4. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said water phase has a pH between 6.0 to 7.6.
5. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said water phase has a buffer capacity between 0.002 to 0.05.
6. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said water phase has a buffer capacity between 0.004 to 0.01.
7. The non-irritating photoprotective cosmetic composition of claim 1 , wherein the photoprotective composition has an SPF of 2 to 50.
8. The non-irritating photoprotective cosmetic composition of claim 1 , wherein the photoprotective cosmetic composition further comprises one or more components selected from the group consisting of pharmaceutically acceptable carrier, emulsifier, emollient, skin-feel additive, moisturizing agent, film former/waterproofing agent, pH adjuster/chelating agent, preservative, carotenoid, and any combinations thereof.
9. The non-irritating photoprotective cosmetic composition of claim 1 , wherein the photoprotective cosmetic composition has a Cumulative Irritation Total (CIT) score of less than 49 in a 14 day cumulative irritation evaluation or cumulative patch test.
10. The non-irritating photoprotective cosmetic composition of claim 1 , wherein the photoprotective cosmetic composition has a CIT score of less than 35 in a 14 day cumulative irritation evaluation or cumulative patch test.
11. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said electrolyte is sodium chloride.
12. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said buffer is trisodium citrate.
13. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said preservative is a combination of phenoxyethanol, methyl paraben, butyl paraben, ethyl paraben, propyl paraben, and isobutyl paraben.
14. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said lubricant is selected from the group consisting of glycerin, PEG-8, PEG-400, and any combinations thereof.
15. The non-irritating photoprotective cosmetic composition of claim 1 , wherein said at least one sunscreen agent is a combination of octyl methoxycinnamate, octyl salicylate, homosalate, and titanium dioxide.