KR102043243B1 - Composition for hair care and method for producing the same - Google Patents

Abstract

Disclosed are a hair care composition and a method of preparing the same, the composition comprising 0.5 to 3 parts by weight of hydrolyzed keratin; 55 to 75 parts by weight of a citrus extract; and 20 to 40 parts by weight of a surfactant, wherein water solubility of the hydrolyzed keratin according to the OECD guideline TG 105 is within 30 to 50 parts by weight per 100 parts by weight of water.

Description

Composition for hair care and method for producing same {Composition for hair care and method for producing the same}

The present invention relates to a hair care composition and a method for manufacturing the same, and more particularly, to a hair care composition and a method for manufacturing the same that can be used in shampoos, conditioning products, styling products and the like.

Hair is one of the main means of expressing oneself to modern people.

The hair care composition is used for various purposes such as hair trimming, hair conditioning, hair protection, anti-dandruff, styling, in addition to a cleaning function to keep the hair clean by removing contaminants of hair and scalp. Therefore, in recent years, various methods for increasing hair absorption of functional ingredients in addition to simple cleaning in hair care compositions have been steadily studied.

Generally, the method of styling and maintaining hair is chemical method by dyeing, perming, using styling products such as gel, mousse, or spray, and nourishing and shine to the hair using conditioner or treatment. Etc.

Dyeing and perming usually have long-lasting effects but can cause hair damage if not accompanied by proper care. Styling products are generally applied to the hair using hands after shampooing, which has the disadvantage of having to wash hands after using the product and stiff and hard hair. Products such as conditioners or treatments need to be washed again after being applied to the hair after shampooing, resulting in waste of water and problems such as problems in the scalp if not sufficiently cleaned.

On the other hand, the hair is composed of 80 to 90 parts by weight of a protein called keratin. However, the hair is damaged due to perm, dyeing, frequent hair drying, and ultraviolet rays, and the gloss disappears and the hair splits. If left unattended, side effects such as hair loss and skin trouble may occur.

Since damage to hair is caused by damage to keratin, a hair protein, various methods for supplying keratin to hair have been proposed. However, keratin has a problem in that binding to hair is poor due to large molecular weight, and when washed with water, the damaged hair is not coated and washed out, and water solubility is poor, resulting in whitening of hair.

It is an object of the present invention to improve the water solubility of keratin proteins, and to provide a hair care composition and a method for producing the same, wherein keratin proteins can penetrate into the hair fibers to strengthen the binding force between cells.

Hair care composition of the present invention according to one embodiment

0.5 to 3 parts by weight of hydrolyzed keratin;

55 to 75 parts by weight of citrus extracts; And

20 to 40 parts by weight of the surfactant,

The water solubility according to the OECD guideline TG 105 of the hydrolyzed keratin is within 30 to 50 parts by weight per 100 parts by weight of water.

Method for producing a hair care composition of the present invention according to another embodiment

a) warming the citrus extract to a temperature of 40 ° C. to 60 ° C .;

b) adding hydrolyzed keratin to the tangerine extract and stirring to dissolve it; And

c) adding and stirring a surfactant to the citrus extract in which the hydrolyzed keratin is dissolved, and

0.5 to 3 parts by weight of the hydrolyzed keratin, 55 to 75 parts by weight of the citrus extract and 20 to 40 parts by weight of the surfactant in the hair care composition,

The water solubility according to the OECD guideline TG 105 of the hydrolyzed keratin is within 30 to 50 parts by weight per 100 parts by weight of water.

The hair care composition according to the present invention improves the water solubility of keratin proteins, improves the absorption of hair, promotes hair elasticity, gloss and soft touch, and can prevent hair damage in advance.

The hair care composition of the present invention according to one embodiment includes the following ingredients:

0.5 to 3 parts by weight of hydrolyzed keratin;

55 to 75 parts by weight of citrus extracts; And

20 to 40 parts by weight of surfactant.

The water solubility according to the OECD guideline TG 105 of the hydrolyzed keratin may be 30 to 50 parts by weight per 100 parts by weight of water.

The hydrolyzed keratin penetrates into the hair fibers to enhance the cohesion between the hair cells, thereby enhancing the elasticity of the hair and enhancing the gloss and soft touch, as well as preventing hair damage in advance.

The hydrolyzed keratin may be obtained by hydrolyzing keratin at least two times using a protein hydrolysing agent. The average molecular weight of the hydrolyzed keratin by primary hydrolysis (hereinafter referred to as "primary hydrolyzed keratin") may be within 3,000 to 5,000, and the hydrolyzed keratin by secondary hydrolysis (hereinafter referred to as "secondary hydrolyzed keratin" Average molecular weight) may be within the range of 1,000 to 2,000.

When the average molecular weight (weight average molecular weight) of the primary hydrolyzed keratin is within 3,000 to 5,000, the standard deviation of the molecular weight is small, so that it is easy to control the molecular weight during the second hydrolysis. If the average molecular weight of the secondary hydrolyzed keratin is within 1,000 to 2,000, it may have appropriate water solubility while maintaining the main structure of the keratin. Since the main structure of keratin is maintained, it is possible to supply effective nutrients to the hair, and the water solubility in water is good, thereby preventing the whitening of hair due to the residual of the undissolved matter in the hair care composition. Hair whitening refers to a phenomenon in which high molecular weight keratin precipitates due to low water solubility and adheres to the surface of hair white.

In addition, if the water solubility of the hydrolyzed keratin according to the OECD guideline TG 105 is 30 to 50 parts by weight per 100 parts by weight of water, the required amount of hydrolyzed keratin can be added without modification of the effective protein. That is, the hydrolyzed keratin having water solubility in the above range maintains the structure of keratin having the effect of giving elasticity, shine and soft touch to the hair and protecting the hair.

In addition, when the amount of hydrolyzed keratin is 0.5 to 3 parts by weight in the hair care composition, it may exhibit an effective effect due to keratin and does not cause stickiness to the hair.

Keratin may be supplied from, for example, wool, hair, feathers, cocoons, horns, horseshoe, and the like, but is not limited thereto.

delete

Citrus extract can be extracted from, for example, domestic Jeju citrus, but is not limited thereto. Jeju citrus in the present specification, for example, Hagyul, Ilhyangha, Pyungyul, Bujiwha, Dangyuja, Jigak, Joadeung, Dongjunggyul ), Gamwhagyul, Potato (Gamja), Sadugam, Seminole, Chunggyun, Bunggyul, Geumgamja, Cheonyahagyul, etc. It may include, but is not limited thereto.

Citrus extract can be extracted from the citrus peel according to a conventional essential oil extraction method, the essential oil extraction method can be easily implemented by those skilled in the art. For example, steam distillation, which flows out at a temperature lower than the actual boiling point, expression that is compressed to obtain essential oils, adsorption, which is absorbed by non-volatile solvents such as fat, and volatile solvents (e.g., Solvent extraction using hexane, ethyl alcohol, benzene, etc.) to extract fragrance components, extraction and supercritical gas extraction methods to collect effluents from wounds on plant stems or rhizomes. (supercritical extration, CO ₂ extraction), but is not limited to such.

Citrus extracts may be D-limonene as a main component, which may be included in 70 to 90% by weight. In addition, the citrus extract contains hesperidin, naringin, narizine, narylcin as flavonoids, and may contain carotenoids, pectin and the like. Citrus extracts can nourish the hair due to these ingredients to soften and give elasticity to the hair, and also have a hair moisturizing effect to give the hair glossiness.

Surfactants are necessary ingredients for washing hair and scalp. Surfactants include decylglucoside, laurylglucoside, polyglyceryl-4 caprate, coco glucoside, sodium lauryl sulfate, sodium laureth sulfate, lauramide DEA or Combinations thereof may be included, but are not limited thereto.

The surfactant may be used in an amount of 20 to 40 parts by weight in the hair care composition according to the present invention. If the surfactant is 20 to 40 parts by weight, the composition may contain a sufficient amount of other components while maintaining the cleaning power.

On the other hand, the hair care composition may further include one or more components selected from a moisturizer, preservatives, viscosity regulators, pH regulators, flavoring agents and pigments.

Moisturizing agents may include, for example, glycerin, hyaluronic acid, butylene glycol, propylene glycol, sorbitol, hexylene glycol, dipropylene glycol, diglycerin, panthenol, betaine, hydrolyzed wheat protein or combinations thereof. Preservatives include methyl paraoxybenzoate, methylparaben, butylparaben, ethylparaben, propylparaben, benzyl alcohol, phenoxyethanol, phenoxyisopropanol, phenylpropanol, methylchloroisothiazolinone, methylisothiazolinone or combinations thereof. It may include, but is not limited thereto.

Preservatives include methyl paraoxybenzoate, methylparaben, butylparaben, ethylparaben, propylparaben, benzyl alcohol, phenoxyethanol, phenoxyisopropanol, phenylpropanol, methylchloroisothiazolinone, methylisothiazolinone or combinations thereof. It may include, but is not limited thereto.

Viscosity modifiers may include, but are not limited to, fatty alcohols, fatty acids, hydroxypropylmethylcellulose, hydroxymethylcellulose, sodium chloride, ammonium chloride, propylene glycol, hexylene glycol, or combinations thereof.

pH adjusters include citric acid, salicylic acid, acetic acid, adipic acid, aminoethyl propanediol, aminomethyl propanediol, aminomethyl propanol, aminopropanediol, ascorbic acid, azelaic acid, benzoic acid, butyl diethanol Amine, butylethanolamine, citric acid, dibutyl ethanolamine, diethanolamine, diisopropylamine, diisopropanolamine, dimethyl isopropanolamine, decylethanolamine, fumaric acid, galacturonic acid, glutaronic acid, glutaric acid Glutaric acid, glycolic acid, lactic acid, tartaric acid, isopropanolamine, isopropylamine, maleic acid, malic acid, malonic acid, methylethanolamine or their Combinations. Specifically, the pH adjusting agent may include citric acid, salicylic acid, glycolic acid, lactic acid, tartaric acid, and combinations thereof, but is not limited thereto. pH adjusting agent may adjust the pH of the hair care composition to 5 to 7, it may be included in an appropriate content for this purpose.

The hair care composition includes at least one of the above ingredients in an amount suitable for use, including hair shampoo, hair rinse, hair conditioner, hair treatment, hair cream, hair lotion, scalp pack, hair tonic, hair nourishing lotion, It may be formulated as an ampoule, hair serum, hair mousse, hair wax, hair spray, hair gel or scalp treatment.

Specifically, the hair care composition may be formulated as a hair mousse, hair wax, hair spray, or hair gel, but is not limited thereto.

According to another embodiment, the method for preparing the hair care composition of the present invention includes the following steps:

a) warming the citrus extract to a temperature of 40 ° C. to 60 ° C .;

b) adding hydrolyzed keratin to the warmed citrus extract and stirring to dissolve it; And

c) adding a surfactant to the tangerine extract in which the hydrolyzed keratin is dissolved and stirring.

Citrus extract, hydrolyzed keratin, and surfactant of the method for preparing the hair care composition are as described above in the hair care composition. The hair care composition includes 0.5 to 3 parts by weight of hydrolyzed keratin, 55 to 75 parts by weight of citrus extract, and 20 to 40 parts by weight of surfactant based on the total weight of the composition. On the other hand, in step b) or step c) may be further added one or more selected from a moisturizing agent, preservatives, viscosity regulators, pH regulators, flavoring agents and pigments.

The agitation of step b) and the agitation of step c) may be carried out independently for 30 to 120 minutes at a speed of 100 to 400 rpm.

The method for preparing hydrolyzed keratin may comprise the following steps:

1) primary hydrolysis of keratin using a primary protein hydrolysing agent;

2) secondary hydrolyzing said primary hydrolyzed keratin using a secondary protein hydrolysing agent; And

3) filtering and drying the secondary hydrolyzed keratin to form a powder.

In this case, the primary proteolytic agent and the secondary proteolytic agent may be proteolytic enzymes. Primary and secondary proteolytic agents are, for example, Bacillus spp. From Bacillus amyloliquefaciens, Bacillus polymyxa, Bacillus licheniformis and the like. It may be selected, but is not limited thereto. The primary proteinase and the secondary proteinase may be the same or different.

In step 1) and step 2) the mixture comprising keratin and protein hydrolysing agent may be stirred at a temperature of 50 to 70 ° C. For example, the mixture may be stirred for 30 to 120 minutes at a speed of 100 to 400 rpm.

Filtration in step 3) can be performed multiple times using sieves or filters of different sizes. For example, primary filtration can be performed using a 200 mesh sieve and secondary filtration using a 10 micron filter.

The filtrate can be heated, for example in step 3), to inactivate the proteolytic agent so that the keratin does not continue to hydrolyze until it loses its effective function. For example, a powder of keratin hydrolyzed by spray drying can be obtained.

Hereinafter, the present invention will be described in detail by experimental examples and examples. It will be understood that the invention is not limited to these examples.

Preparation of Hydrolyzed Keratin

Hydrolyzed keratin of Experimental Examples 1 to 3 and Comparative Experimental Examples 1 to 3 were prepared using the raw materials and contents as shown in Table 1 below.

(Unit: parts by weight) Wool extraction
keratin Purified water 5% NaOH
Aqueous solution Primary Protein Hydrolyzate Secondary protein hydrolysing agents Experimental Example 1 20 79 0.5 0.25 0.25 Experimental Example 2 20 78.9 0.5 0.30 0.30 Experimental Example 3 20 79.1 0.5 0.20 0.20 Comparative Experimental Example 1 20 79 0.5 0.50 - Comparative Experiment 2 20 79 0.5 - 0.50 Comparative Experiment 3 20 79 0.5 0.10 0.40

Experimental Example 1

The keratin extracted from wool and purified water are mixed, and stirred for 30 minutes at 200 rpm while maintaining the temperature of 55-60 ℃ in a stirred incubator. The primary hydrolysis is performed for 30 minutes by adding Bacillus licheniformis as a primary protein hydrolysing agent while adjusting the pH to a base using a 5% aqueous NaOH solution. Subsequently, Bacillus amyloliquefaciens is added as a secondary protein hydrolyzate and stirred for 30 minutes at 200 rpm.

After the hydrolysis, the filtrate and the residue are separated by primary filtration using a 200 mesh sieve. The first filtered filtrate was filtered secondly using a 10 micron filter under reduced pressure to remove impurities. The secondary filtered filtrate was heated at 85 ° C. for 30 minutes to inactivate the remaining proteolytic agent (enzyme) and to wet the wet cake? Obtain hydrolyzed keratin in state. Obtained wet ke? Hydrolyzed keratin in the form of a spray is dried to obtain hydrolyzed keratin in the form of a powder.

Experimental Example 2

Hydrolyzed keratin was prepared in the same manner as in Experiment 1 except that 0.3 parts by weight of the primary and secondary protein hydrolysers were used and 78.9 parts by weight of purified water.

Experimental Example 3

Hydrolyzed keratin was prepared in the same manner as in Experiment 1 except that 0.2 parts by weight of the primary and secondary protein hydrolysers were used and 79.1 parts by weight of purified water.

Comparative Experimental Example 1

Hydrolysis keratin was prepared in the same manner as in Experiment 1 except that 0.5 parts by weight of the primary protein hydrolyzing agent was hydrolyzed for 30 minutes and no secondary protein hydrolysing agent was used.

Comparative Experimental Example 2

Hydrolyzed keratin was prepared in the same manner as in Experiment 1 except that the hydrolyzate was performed for 30 minutes using 0.5 parts by weight of the secondary protein hydrolyzate without using the primary protein hydrolyzate.

Comparative Experiment 3

Hydrolyzed keratin was prepared in the same manner as in Experimental Example 1 except that 0.1 part by weight and 0.4 part by weight of the primary and secondary protein hydrolysers and 78.9 parts by weight of purified water were used.

Determination of molecular weight and water solubility of hydrolyzed keratin

The molecular weights of the hydrolyzed keratin of Experimental Examples 1 to 3 and Comparative Examples 1 to 3 were measured using aqueous gel permeation chromatography (GPC), and the water solubility was tested by the OECD guideline TG 105. Analyzed and measured. The molecular weight and the water solubility measured are shown in Table 2.

Analysis Experimental Example 1 Experimental Example 2 Experimental Example 3 compare
Experimental Example 1 compare
Experimental Example 2 compare
Experimental Example 3 Primary
After hydrolysis Number average molecular weight
(Mn) 1,910 1,310 2,150 510 - 3,210 Weight average molecular weight
(Mw) 3,750 3,120 4,660 1,580 - 8,970 Standard Deviation (Mw / Mn) 1.96 2.38 2.17 3.10 - 2.79 Secondary
After hydrolysis Number average molecular weight
(Mn) 1,130 950 1,170 - 380 370 Weight average molecular weight
(Mw) 1,650 1,410 1,930 - 1,950 2,050 Standard Deviation (Mw / Mn) 1.46 1.48 1.65 - 5.13 5.54 Acceptance
(g / water 100 g) 45.6 43.4 40.1 20.5 18.8 30.7

Referring to Table 2, in Experimental Examples 1 to 3, the standard deviation, which is the value obtained by dividing the weight average molecular weight by the number average molecular weight, is small, so that the difference by molecular weight is not large. However, in Comparative Examples 1 to 3, the standard deviation was large, so that low molecular weight keratin and high molecular weight keratin were widely distributed.

On the other hand, the water solubility of the hydrolyzed keratin of Experimental Examples 1 to 3 is higher than that of Comparative Experiments 1 to 3, which is believed to be due to the narrow molecular weight distribution of Experimental Examples 1 to 3. On the other hand, the low water solubility of the hydrolyzed keratin of Comparative Experiments 1 to 3 is believed to be due to the wide molecular weight distribution.

That is, the molecular weight and the standard deviation of the molecular weight of the hydrolyzed keratin vary depending on the conditions of hydrolysis, and there is a difference in water solubility. From this, it can be seen that not only the molecular weight but also the standard deviation of the molecular weight have a close correlation with the water solubility.

Preparation of hair care compositions

The hair care compositions of Examples 1 to 5 and Comparative Examples 1 to 6 were prepared using the raw materials and contents as described in Table 3 below.

(Unit: parts by weight) Citrus Extract Hydrolysis
keratin Surfactants pH regulator Spices and
antiseptic Example 1 67.5 1.0 (Experimental Example 1) 30 0.5 1.0 Example 2 68.0 0.5 (Experimental Example 1) 30 0.5 1.0 Example 3 65.5 3.0 (Experimental Example 1) 30 0.5 1.0 Example 4 67.5 1.0 (Experimental Example 2) 30 0.5 1.0 Example 5 67.5 1.0 (Experimental Example 3) 30 0.5 1.0 Comparative Example 1 67.5 0.2 (Experimental Example 1) 30 0.5 1.0 Comparative Example 2 68.3 4.0 (Experimental Example 1) 30 0.5 1.0 Comparative Example 3 67.5 1.0 (before hydrolysis) 30 0.5 1.0 Comparative Example 4 67.5 1.0 (Comparative Experiment 1) 30 0.5 1.0 Comparative Example 5 67.5 1.0 (Comparative Experiment 2) 30 0.5 1.0 Comparative Example 6 67.5 1.0 (Comparative Experiment 3) 30 0.5 1.0

Example 1

Hydrolyzed keratin prepared in Experimental Example 1 was added to the tangerine extract heated to a temperature of 60 ℃ and dissolved by stirring for 30 minutes at 200 rpm. To the tangerine extract in which hydrolyzed keratin was dissolved, a surfactant, a pH adjuster, a flavoring agent, and a preservative were added, and stirred at 200 rpm for 30 minutes to prepare a hair care composition. At this time, decylglucoside was used as a surfactant, and citric acid was used as a pH adjuster. The prepared hair care composition was injected into a pump container.

Example 2

A hair care composition was prepared in the same manner as in Example 1, except that 0.5 parts by weight instead of 1 part by weight of hydrolyzed keratin prepared in Experimental Example 1 and 68.0 parts by weight instead of 67.5 parts by weight of citrus extracts were used.

Example 3

3 parts by weight instead of 1 part by weight of hydrolyzed keratin prepared in Experimental Example 1, 65.5 parts by weight instead of 67.5 parts by weight of citrus extract was prepared in the same manner as in Example 1.

Example 4

A hair care composition was prepared in the same manner as in Example 1, except that the hydrolyzed keratin prepared in Experimental Example 2 was used instead of the hydrolyzed keratin prepared in Experimental Example 1.

Example 5

A hair care composition was prepared in the same manner as in Example 1, except that the hydrolyzed keratin prepared in Experimental Example 3 was used instead of the hydrolyzed keratin prepared in Experimental Example 1.

Comparative Example 1

0.2 parts by weight instead of 1 part by weight of hydrolyzed keratin prepared in Experimental Example 1, and 68.3 parts by weight instead of 67.5 parts by weight of citrus extract, except that the composition for hair care was prepared in the same manner as in Example 1.

Comparative Example 2

4 parts by weight instead of 1 part by weight of hydrolyzed keratin prepared in Experimental Example 1, 64.5 parts by weight instead of 67.5 parts by weight of citrus extract was prepared in the same manner as in the hair care composition.

Comparative Example 3

A hair care composition was prepared in the same manner as in Example 1, except that keratin (molecular weight 15,000) was used before hydrolysis instead of the hydrolysis keratin prepared in Experimental Example 1.

Comparative Example 4

A hair care composition was prepared in the same manner as in Example 1, except that the hydrolyzed keratin of Comparative Experiment 1 was used instead of the hydrolyzed keratin prepared in Experimental Example 1.

Comparative Example 5

A hair care composition was prepared in the same manner as in Example 1, except that the hydrolyzed keratin of Comparative Experiment 2 was used instead of the hydrolyzed keratin prepared in Experimental Example 1.

Comparative Example 6

A hair care composition was prepared in the same manner as in Example 1, except that the hydrolyzed keratin of Comparative Experiment 3 was used instead of the hydrolyzed keratin prepared in Experimental Example 1.

Sample Preparation and Characterization

Hair tress preparation and pretreatment of normal and damaged hair

Cut hair of women in their 20s without perm or dyeing to make a hair tress of 20cm in length and 8g in weight, and remove foreign substances by treating it with 5% hydrochloric acid solution and 5% sodium hydroxide solution for 15 minutes each. Hair tress was used.

Some of the normal hair tresses were immersed in a 1: 1 mixed solution of 10% hydrogen peroxide and 10% ammonia water for 30 minutes, neutralized in 5% hydrochloric acid solution, rinsed in tap water, and bleached three times to give damaged hair tresses. .

<Application of hair care composition>

After applying the composition of Examples 1 to 5 and Comparative Examples 1 to 6 evenly to the hair tress 2 times each time to give a bubble for 2 minutes and rinsing in tap water once a day and repeated a total of 25 times The amount of keratin uptake was investigated.

<Method of analyzing keratin absorbed by hair tress>

a) For pre-treated and damaged hair, 8 g of hair tress was soaked in 50 ml of petroleum ether and sonicated for 30 minutes to dissolve the keratin inside the hair with amino acids. It was then completely distilled at 35 ° C. using a rotary vacuum evaporator, the residue was dissolved in hexane, and GC / Mass (Gas Chromatography / Mass spectrometry), keratin amino acid before application of the hair care composition. The types and amounts of were analyzed.

b) For hair tresses of normal hair and damaged hair to which the hair care compositions of Examples 1 to 5 and Comparative Examples 1 to 6 were applied by the above-described method, keratin amino acid was prepared using the same method as described in a). Kind and amount were analyzed.

c) comparing the type and amount of keratin amino acids before applying the composition for hair care with the type and amount of keratin amino acids after applying the composition for hair care of b) to confirm the absorption of keratin absorbed into the hair, Indicated.

<Terms of use of GC / Mass>

GC column: HPI 0.25 μm, 25 m)

Injector Temperature: 250 ℃

Injection volume: 1 μl

-Column temperature: initial 200 ° C, rise 5 ° C / min, final temperature 300 ° C

Carrier gas: N ₂

<Style retention evaluation>

The evaluation of the style holding power was performed by washing a hair tress having a length of 20 cm and a weight of 0.8 g by immersing in a 5% polyoxyethylene lauryl ether solution for 5 minutes, then rinsing for 1 minute in running water, It is left to dry for a while. After immersing the hair tress for 5 minutes in the compositions of Examples 1 to 5 and Comparative Examples 1 to 6, rinse for 1 minute in running water and leave for 30 minutes in a constant temperature and humidity chamber (25 ℃, 50RH%) to remove water. The dry hair skein is wound on a spiral device and dried for 5 hours in a thermo-hygrostat (25 ° C, 30 RH%). The dry hair is separated from the spiral device and placed in a thermo-hygrostat (25 ° C, 50 RH%) for styling by the usual curl retention method, which compares the degree of curling over time for 3 hours. Relative comparison of retention effects (see J. Soc. Cosmetic Chemists. Dec 9, 1968). Equation 1 was used to calculate the percent retention. The higher the retention value, the better the style retention. Table 4 shows the average value of three repeated measurements of the tension.

Curl Retention (%) = ((L0-Lt) / (L0-Ls)) * 100 (1)

In Equation 1, L0 is the length of the hair used for the test, Lt is the length of the hair tress after t hours, Ls is the initial length of the curl tress formed (t = 0).

Keratin Absorption (mg) Curl Retention (%) Normal hair Damaged hair Example 1 32.0 27.3 92 Example 2 31.3 26.5 88 Example 3 29.4 26.3 87 Example 4 28.8 25.9 87 Example 5 27.2 26.1 85 Comparative Example 1 24.4 12.3 60 Comparative Example 2 25.2 16.8 73 Comparative Example 3 25.8 17.5 75 Comparative Example 4 26.2 19.2 74 Comparative Example 5 24.5 20.1 68 Comparative Example 6 25.1 18.6 71

The keratin uptake of Table 4 is the total keratin uptake when the compositions of Examples 1-5 and Comparative Examples 1-6 were used 25 times for normal hair hair tresses and damaged hair tresses.

Referring to Table 4, it can be seen that the keratin protein of the composition of the present invention is well absorbed by damaged hair as well as normal hair. From the above results, it can be seen that the suitable molecular weight of the keratin protein absorbed by the hair is 500 to 3,000, preferably about 1,000 to 2,000.

In Table 4, in the case of Comparative Examples 1 to 6 from the lower keratin uptake than Examples 1 to 5, the keratin was not hydrolyzed or was only hydrolyzed, or the amount of hydrolyzed keratin in the composition was in an appropriate range. In case of deviation, it can be inferred that keratin is adsorbed only on the surface of the hair and then falls off but is not absorbed well by the hair.

On the other hand, referring to the retention (%) in Figure 4, it can be seen that the style holding force by the composition of Examples 1 to 5 is much more effective than the style holding force by the compositions of Comparative Examples 1 to 6.

As discussed above, the hair care composition of the present invention has improved water solubility of keratin protein, and keratin protein, which is an essential nutrient of hair, penetrates into the hair fibers to strengthen the cohesion between cells. Therefore, the hair care composition of the present invention can enhance the elasticity of the hair, improve the shine and soft touch, as well as prevent the damage of the hair in advance, it was confirmed that to maintain the hair style desired by consumers.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (9)

0.5 to 3 parts by weight of hydrolyzed keratin;
55 to 75 parts by weight of citrus extracts; And
20 to 40 parts by weight of the surfactant,
The hydrolyzed keratin is obtained by the second or more hydrolysis of keratin using a protein hydrolysing agent,
The weight average molecular weight (Mw) of keratin by primary hydrolysis is within 3,000 to 5,000,
The weight average molecular weight (Mw) of keratin by secondary hydrolysis is within 1,000 to 2,000,
The standard deviation (weight average molecular weight / number average molecular weight) of the weight average molecular weight of keratin by the first hydrolysis is 1.5 to 2.5,
The standard deviation (weight average molecular weight / number average molecular weight) of the weight average molecular weight of keratin by the secondary hydrolysis is 1.2 to 1.8,
The composition for hair care of water solubility according to the OECD guideline TG 105 of the hydrolyzed keratin is within 30 to 50 parts by weight per 100 parts by weight of water. delete delete According to claim 1,
A preservative, a viscosity adjusting agent, a pH adjusting agent, a fragrance, and a hair care composition further comprising at least one selected from pigments. A hair care product formulated with the hair care composition of claim 1. The method of claim 5,
Hair shampoo, hair rinse, hair conditioner, hair treatment, hair cream, hair lotion, scalp pack, hair tonic, hair nourishing lotion, ampoule, hair serum, hair mousse, hair wax, hair spray, hair gel or scalp treatment Hair care products containing. As a method for producing a hair care composition,
a) warming the citrus extract to a temperature of 40 ° C. to 60 ° C .;
b) adding hydrolyzed keratin to the tangerine extract and stirring to dissolve it; And
c) adding and stirring a surfactant to the citrus extract in which the hydrolyzed keratin is dissolved, and
At this time, the hair care composition comprises 0.5 to 3 parts by weight of the hydrolyzed keratin, 55 to 75 parts by weight of the citrus extract and 20 to 40 parts by weight of the surfactant,
The hydrolyzed keratin is obtained by the second or more hydrolysis of keratin using a protein hydrolysing agent,
The weight average molecular weight (Mw) of keratin by primary hydrolysis is within 3,000 to 5,000,
The weight average molecular weight (Mw) of keratin by secondary hydrolysis is within 1,000 to 2,000,
The standard deviation (weight average molecular weight / number average molecular weight) of the weight average molecular weight of keratin by the first hydrolysis is 1.5 to 2.5,
The standard deviation (weight average molecular weight / number average molecular weight) of the weight average molecular weight of keratin by the secondary hydrolysis is 1.2 to 1.8,
The water solubility according to the OECD guideline TG 105 of the hydrolyzed keratin is less than 30 parts by weight to 50 parts by weight per 100 parts by weight of water. delete The method of claim 7, wherein
A method for producing a hair care composition further comprising the step of adding one or more selected from preservatives, viscosity regulators, pH regulators, fragrances and pigments.