Composition for removing abnormal keratinous material
View Patent ↗The present invention discloses a pharmaceutical method comprising urea, a hydrophilic film-forming agent, water and/or a water-alcohol mixture that is suitable for the removal of abnormal keratinous material.
1. A method of hydrating brittle toenails or fingernails comprising applying to brittle toenails or fingernails a solution consisting of:
urea in an amount from 15 percent by weight to 35 percent by weight based on the weight of the entire solution;
a hydrophilic film-forming agent in an amount from 15 percent by weight to 35 percent by weight based on the weight of the entire solution, wherein the hydrophilic film-forming agent is a compound selected from acrylic/methacrylic acid ester copolymers, polyvinylpyrrolidones, polyvinyl alcohols, vinyl acetate/vinylpyrrolidone copolymers, vinyl acetate/crotonic acid copolymers, methyl vinyl ether/maleic acid copolymers, polyesters, polyester amides, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, and mixtures thereof; and
an aqueous-alcoholic mixture that comprises an alcohol selected from methanol, ethanol, propanol, isopropanol, butanol, pentanol, hexanol, and mixtures thereof.
2. The method of claim 1 , wherein the hydrophilic film-forming agent is a polyvinylpyrrolidone.
3. The method of claim 1 , wherein the alcohol is ethanol, n-propanol, or isopropanol.
4. The method of claim 1 , wherein the ratio of alcohol to water is from 9:1 to 1:9.
5. The method of claim 4 , wherein the ratio of alcohol to water comprises 2 parts of alcohol to 3 parts of water.
6. The method of claim 1 , wherein the amount of the aqueous-alcoholic mixture is from 30 percent by weight to 60 percent by weight, based on the weight of the entire solution.
7. The method of claim 1 , wherein the amount of the aqueous-alcoholic mixture is from 35 percent by weight to 55 percent by weight, based on the weight of the entire solution.
8. The method of claim 1 , wherein the amount of water is from 30 percent by weight to 60 percent by weight, based on the weight of the entire solution.
9. The method of claim 1 , wherein the amount of water is from 35 percent by weight to 55 percent by weight, based on the weight of the entire solution.
10. The method of claim 1 , wherein the hydrophilic film-forming agent is present in an amount from 17 percent by weight to 25 percent by weight, based on the weight of the entire solution.
11. The method of claim 1 , wherein the aqueous solution comprises water in an amount from 30% by weight to 60% by weight, based on the weight on the entire solution.