Method of treating keratinic fibers with creatine, creatinine and/or their salts to strengthen, restructure, harden and stabilize them

1. A method of strengthening or repairing human hair grown out of a scalp of a person, said method consisting of the steps of:

a) providing a hair treatment composition consisting of

at least one solvent,

at least one auxiliary agent,

at least one pH adjusting agent, and

at least one active ingredient for strengthening or repairing the human hair grown out of the scalp of the person, wherein said at least one active ingredient is selected from the group consisting of creatine, creatinine, and salts of said creatinine;

wherein said at least one solvent is selected from the group consisting of water, ethanol, n-propanol, isopropanol, glycols and glycol ethers;

wherein said at least one auxiliary agent is selected from the group consisting of sodium lauryl ether sulfate, fatty alcohol sulfates, ethoxylated fatty alcohol sulfates, alkyl sulfonates, alkylbenzene sulfonates, alkyltrimethylammonium salts, ethoxylated fatty alcohols, ethoxylated nonylphenols, fatty alkanol amides, ethoxylated fatty esters, fatty alcohols, isopropyl myristate, starch, hydroxyethylcellulose, polyvinylpyrrolidone/vinyl acetate copolymer, polyvinyl pyrrolidone/vinylimidazolium methochloride copolymer, 1,2-dibromo-2,4-dicyanobutamine-2-phenoxylethanol, perfume oils, ammonium hydrogen carbonate, NaCl, p-toluylenediamine, resorcinol, aminophenol, ethylenediaminetetracetic acid, hydrogen peroxide, thioglycolic acid, propane, butane, dimethyl ether, nitrogen, carbon dioxide, paraffin oil, petrolatum, lanolin, lanolin alcohol, lanolin alkoxylate, cholesterol and thiols; and

wherein said pH adjusting agents are selected from the group consisting of phosphoric acid, acetic acid, glutathione, ammonia, alkanolamines, alkylamines, alkali metal hydroxides, ammonium hydroxide, alkali metal carbonates, ammonium carbonate and alkali metal phosphates;

b) bringing said hair treatment composition into contact with said human hair;

c) allowing said hair treatment composition to remain in contact with said human hair for a predetermined exposure time interval; and

d) rinsing said hair treatment composition from the human hair when said exposure time interval ends;

wherein said predetermined exposure time interval is from 1 to 60 minutes and said hair treatment composition is at a temperature of between 20° C. and 60° C. during the time interval, or said predetermined exposure time interval is from 5 to 20 minutes and said hair treatment composition is at a temperature of between 30° C. and 50° C. during the time interval.

2. The method as defined in claim 1 , wherein said hair treatment composition comprises said water, said pH adjusting agent, from 0.01 to 10.0 percent by weight of said creatine, and said hair treatment composition has a pH of from 3.0 to 9.0.

3. The method as defined in claim 1 , wherein said hair treatment composition contains from 0.1 to 3.0 wt. % of said creatine, based on a total amount of said hair treatment composition.

4. A method of increasing volume or combability of human hair grown out of a scalp of a person, said method consisting of the steps of:

a) providing a hair treatment composition consisting of

at least one solvent,

at least one auxiliary agent,

at least one pH adjusting agent, and

at least one active ingredient for increasing volume or combability of the human hair grown out of the scalp of the person, wherein said at least one active ingredient is selected from the group consisting of creatine, creatinine, and salts of said creatinine;

wherein said at least one solvent is selected from the group consisting of water, ethanol, n-propanol, isopropanol, glycols and glycol ethers;

wherein said at least one auxiliary agent is selected from the group consisting of sodium lauryl ether sulfate, fatty alcohol sulfates, ethoxylated fatty alcohol sulfates, alkyl sulfonates, alkylbenzene sulfonates, alkyltrimethylammonium salts, ethoxylated fatty alcohols, ethoxylated nonylphenols, fatty alkanol amides, ethoxylated fatty esters, fatty alcohols, isopropyl myristate, starch, hydroxyethylcellulose, polyvinylpyrrolidone/vinyl acetate copolymer, polyvinyl pyrrolidone/vinylimidazolium methochloride copolymer, 1,2-dibromo-2,4-dicyanobutamine-2-phenoxylethanol, perfume oils, ammonium hydrogen carbonate, NaCl, p-toluylenediamine, resorcinol, aminophenol, ethylenediaminetetracetic acid, hydrogen peroxide, thioglycolic acid, propane, butane, dimethyl ether, nitrogen, carbon dioxide, paraffin oil, petrolatum, lanolin, lanolin alcohol, lanolin alkoxylate, cholesterol and thiols; and

wherein said pH adjusting agents are selected from the group consisting of phosphoric acid, acetic acid, glutathione, ammonia, alkanolamines, alkylamines, alkali metal hydroxides, ammonium hydroxide, alkali metal carbonates, ammonium carbonate and alkali metal phosphates;

b) bringing said hair treatment composition into contact with said human hair;

c) allowing said hair treatment composition to remain in contact with said human hair for a predetermined exposure time interval; and

d) rinsing said hair treatment composition from the human hair when said exposure time interval ends;

wherein said predetermined exposure time interval is from 1 to 60 minutes and said hair treatment composition is at a temperature of between 20° C. and 60° C. during the time interval, or said predetermined exposure time interval is from 5 to 20 minutes and said hair treatment composition is at a temperature of between 30° C. and 50° C. during the time interval.

5. The method as defined in claim 4 , wherein said hair treatment composition comprises said water, said pH adjusting agent, from 0.01 to 10.0 percent by weight of said creatine, and said hair treatment composition has a pH of from 3.0 to 9.0.

6. The method as defined in claim 4 , wherein said hair treatment composition contains from 0.1 to 3.0 wt. % of said creatine, based on a total amount of said hair treatment composition.