A disulfide bond repair based hair care composition, product for use on hair and use

Abstract

The present application belongs to the field of new materials for daily chemicals, and particularly relates to a hair care composition based on disulfide bond repair, which is composed of hydrolyzed collagen PG-propyl methyl silane diol and hydrolyzed keratin with an average molecular weight of 400 daltons; the weight ratio of the hydrolyzed collagen PG-propyl methyl silane diol and the hydrolyzed keratin with an average molecular weight of 400 daltons is 5:0.05-10. The composition can improve hair strength and repair damaged hair; the composition of the present application is particularly suitable for playing a role under the action of a hair dryer and repairing heat damage of hair. In addition, the present application also provides a product containing the composition and application.

Description

Technical Field

[0001] This invention relates to the field of new materials for daily chemical products, specifically to a hair care composition based on disulfide bond repair, products applied to hair, and uses. Background Technology

[0002] Hydrolyzed protein is added to shampoo to care for hair. Keratin, for example, is an important protein found in the hair of humans and animals, containing a large amount of amino acids such as sine, glutamic acid, and arginine.

[0003] In existing technologies, shampoos and conditioners that widely use hydrolyzed protein as a raw material are as follows:

[0004] Prior art 1: CN115737498A discloses a small molecule keratin anti-breakage hair care product that easily enters the hair core to repair disulfide bonds, comprising the following raw materials in parts by weight: 10-15 parts of coconut oil diammonium hydroxypropyl hydrolyzed keratin, 5-10 parts of hydrolyzed keratin, 3-6 parts of hydrolyzed keratin PG-propylmethylsilanediol, 2-5 parts of nano amino silicone oil, 1-4 parts of D-panthenol, 2-5 parts of marula oil, 2-6 parts of Tassiti gardenia flower extract, and 3-6 parts of montmorillonite-supported carbon nanotube modifier.

[0005] Prior art 2: CN116350525A discloses a hair color care composition. It comprises the following components by mass percentage: 20-30% surfactant; 0.5-11% liquid crystal phase-inducing structurer, wherein the liquid crystal phase-inducing structurer includes hydroxyl-containing fatty acids and fatty acid esters, fatty alcohols, polysaccharides and their derivatives, wherein the polysaccharides do not include cationic polysaccharides; 1-10% lower fatty alcohols, wherein the lower fatty alcohols have 8 or fewer carbon atoms and 1 or more hydroxyl groups; 0.2-1% cationic polysaccharides; 0.1-4% non-volatile conditioning agent; and 0.1-5% color-protecting component.

[0006] The color-protecting components include 0.01-1% keratin, 0.05-0.15% hydrolyzed keratin PG-propylmethylsilanediol, 0.1-0.5% hydroxypropyltrimethylammonium chloride hydrolyzed keratin, 0.2-0.5% ascorbyl palmitate, and 0.2-0.5% raspberry stem cell extract.

[0007] Prior art 3: CN115569101A discloses a multifunctional shampoo, comprising, by mass percentage: 10%–30% surfactant, 1%–15% hair conditioning agent, 1%–10% nutritional additive, 0.1%–0.5% dandruff remover, 0%–1.0% pH adjuster, 0%–1.0% preservative, 0.5%–2.0% fragrance, 0.00001%–0.01% colorant, and the balance being water; the hair conditioning agent comprises 0.5%–1.2% alcohol, 0.5%–2.0% silicone oil, 0.5%–2.0% amino acids, 0.5%–2.0% quaternary ammonium salt, and 0.3%–1.0% plant extracts. The silicone oil is one or more of polydimethylsiloxane and hydrolyzed collagen PG-propylmethylsilanediol.

[0008] Prior art 4: CN112137951A discloses a silicone-free transparent amino acid shampoo for strengthening hair and repairing the scalp barrier, comprising the following components: an amino acid surfactant composition, an amphoteric surfactant, a conditioning agent, a thickener, a preservative, a fragrance, EDTA-2Na, a solubilizer, lactic acid, a hair biomimetic conditioning composition (HBIM), a barrier repair composition (BRC), and deionized water as the balance. The conditioning agent is one or more of polyquaternium-7, polyquaternium-10, polyquaternium-52, PPG-3 octyl ether, guar hydroxypropyltrimethylammonium chloride, jojoba wax PEG-120 esters, and hydrolyzed collagen PG-propylmethylsilanediol.

[0009] Hydrolyzed collagen PG-propylmethylsilanediol is currently used only as a silicone oil-based conditioning agent.

[0010] The technical problem to be solved by this invention is: how to develop a product that can improve hair strength and enable hair to recover from heat damage. Summary of the Invention

[0011] One of the objectives of this invention is to provide a hair care composition based on disulfide bond repair, which can improve hair strength and repair damaged hair;

[0012] The compositions of this invention are particularly suitable for use when working with a hair dryer to repair heat-damaged hair.

[0013] Furthermore, the present invention also provides products and applications containing the composition.

[0014] Unless otherwise specified, all molecular weights in this invention are in Daltons.

[0015] To achieve the above objectives, the present invention provides a hair care composition based on disulfide bond repair, which is composed of hydrolyzed collagen PG-propylmethylsilanediol and hydrolyzed keratin with an average molecular weight of 400;

[0016] The weight ratio of hydrolyzed collagen PG-propylmethylsilanediol to hydrolyzed keratin with an average molecular weight of 400 is 5:0.05-10.

[0017] The synergistic mechanism of hydrolyzed collagen PG-propylmethylsilanediol and hydrolyzed keratin in this invention is as follows: 80-90% of hair is composed of proteins, mainly keratin. Proteins are not heat-resistant. If the temperature exceeds a certain level, various changes (thermal denaturation) will occur, primarily due to the breakage of disulfide bonds (SS bonds), which can lead to problems such as weakened hair strength.

[0018] The key feature of this invention, using hydrolyzed keratin with a molecular weight of 400, is that smaller molecular weight leads to stronger permeability and easier internal repair. Disulfide bond repair requires stronger internal penetration. However, hydrolyzed keratin with a molecular weight <400 is too hydrophilic and unsuitable for retention. 400 Daltons is the limit molecular weight for effective retention. Each 1g of 400 Dalton hydrolyzed keratin contains 22mg of 1 / 2 cysteine, 1.1 x 10⁻⁶. 20 The amount of 1 / 2 cysteine ​​is a crucial factor in determining disulfide bond repair. Specifically, 400 molecular weight hydrolyzed keratin directly and significantly increases the activity of 1 / 2 cysteine ​​(this amino acid is difficult to use alone in a formula), greatly enhancing the reversible reaction of converting to thiols and directing it towards maintaining the cysteine ​​form. Therefore, during damaging processes such as perming and dyeing, it can increase the cysteine ​​content and ensure hair quality. The specific disulfide bond repair mechanism can be found in [link to relevant documentation]. Figure 1 ;

[0019] Hydrolyzed collagen PG-propylmethylsilane diol provides peptides that can penetrate deep into the hair shaft and hydroxyl groups that bind to the hair surface. The peptides that penetrate deep into the hair shaft can deeply repair protein loss in the hair shaft. At the same time, the compound of diol and hydrolyzed keratin can quickly form a film on the hair surface under appropriate ratio conditions. Under the action of hot air, the two form a relatively dense and thin film on the hair surface, which can not only bind tightly to the hair to repair hair damage, but also make the hair feel silky and shiny.

[0020] That is, by combining hydrolyzed collagen PG-propylmethylsilanediol and hydrolyzed keratin with an average molecular weight of 400, it acts on the hair, forming a dense film layer on the outside to repair and protect the hair surface; on the inside, hydrolyzed collagen PG-propylmethylsilanediol can promote the entry of hydrolyzed keratin with a molecular weight of 400 into the hair and repair disulfide bonds.

[0021] The above formula is suitable for use when using a hair dryer to repair heat-damaged hair.

[0022] The hair care composition described above also includes hydrolyzed keratin PG-propylmethylsilanediol; the average molecular weight of the hydrolyzed keratin PG-propylmethylsilanediol is 1200.

[0023] In the above-mentioned hair care composition, the weight ratio of hydrolyzed collagen PG-propylmethylsilanediol and hydrolyzed keratin PG-propylmethylsilanediol is 5:0.05-10.

[0024] The hair care composition described above also includes hydrolyzed keratin with an average molecular weight of 10,000 and hydrolyzed collagen with an average molecular weight of 2,000.

[0025] The weight ratio of hydrolyzed collagen PG-propylmethylsilanediol to hydrolyzed keratin with an average molecular weight of 10,000 is 5:0.05-10;

[0026] The weight ratio of hydrolyzed collagen PG-propylmethylsilanediol to hydrolyzed collagen with an average molecular weight of 2000 is 5:0.05-10.

[0027] In the above-described hair care composition, the average molecular weight of the hydrolyzed collagen PG-propylmethylsilanediol is 2200.

[0028] In the above-mentioned hair care composition, the composition comprises hydrolyzed collagen PG-propylmethylsilanediol, hydrolyzed keratin with an average molecular weight of 400, hydrolyzed keratin PG-propylmethylsilanediol, hydrolyzed keratin with an average molecular weight of 10000, and hydrolyzed collagen with an average molecular weight of 2000 in a weight ratio of 5:0.5-10:0.5-10:0.5-10.

[0029] In addition, the present invention also provides a product for use on hair, containing 0.05 to 10 wt% of any of the hair care compositions described above and the balance being water.

[0030] Among the aforementioned products applied to hair, the product is one of shampoo, conditioner, or dry shampoo spray.

[0031] Finally, the present invention also discloses the use of products applied to hair prepared using any of the combinations described above.

[0032] The beneficial effects of this invention are as follows:

[0033] The combination of hydrolyzed collagen PG-propylmethylsilanediol and hydrolyzed keratin with an average molecular weight of 400 acts on the hair, forming a dense film on the outside to repair and protect the hair surface; on the inside, hydrolyzed collagen PG-propylmethylsilanediol can promote the entry of hydrolyzed keratin with a molecular weight of 400 into the hair shaft to repair disulfide bonds.

[0034] The above formula is suitable for use when using a hair dryer to repair heat-damaged hair. Attached Figure Description

[0035] Figure 1 This is a schematic diagram illustrating the repair of disulfide bonds by hydrolyzed keratin 1 according to the present invention;

[0036] Figure 2 Microscopic image of the wetting effect of the composition shown in Example 1 after it is applied to the hair as a conditioner;

[0037] Figure 3 Microscopic image of the effect of the composition shown in Comparative Example 1 as a hair conditioner on the hair. Detailed Implementation

[0038] The technical solution of the present invention will be further described in detail below, but this does not constitute any limitation on the present invention.

[0039] Raw material source description:

[0040] Hydrolyzed collagen PG-propylmethylsilanediol: Trade name: Promois W-52USIG; average molecular weight: 2200 Daltons; solid content: 10%; the remainder is solvent, including 3% butanediol, 1.5% phenoxyethanol, and water added to 100%; supplier: Seiwa Chemical Industries, Japan;

[0041] Hydrolyzed keratin PG-propylmethylsilanediol: Trade name: Promois WK-HSIGF; average molecular weight 1200 Daltons, solid content 25%; the remainder is solvent, including 3% butanediol, 1% phenoxyethanol, and water added to 100%; supplier: Seiwa Chemical Industries, Japan;

[0042] Hydrolyzed Keratin 1: Trade name: Promois WK-F; average molecular weight: 400 Daltons; solid content: 25%; the remainder is solvent, including 3% butylene glycol, 1% phenoxyethanol, and water added to 100%; supplier: Seiwa Chemical Industries, Japan;

[0043] Hydrolyzed Keratin 2: Trade name: Promois WK-GB; average molecular weight: 10,000 Daltons; solid content: 20%; the remainder is solvent, including 5% dipropylene glycol, 0.3% methylparaben, 0.01% propylparaben, and water added to 100%; supplier: Seiwa Chemical Co., Ltd., Japan.

[0044] Hydrolyzed collagen: Trade name Promois W-52U; average molecular weight 2000 Daltons, solid content 20%; the remainder is solvent, including 3% butylene glycol, 1% phenoxyethanol, and water added to 100%; supplier: Seiwa Chemical Industries, Japan.

[0045] Examples 1-5

[0046] Table 1 provides the formulation of the composition, which is prepared by adding each raw material to water and stirring until homogeneous.

[0047] Table 1 Formulation Table (Unit: g)

[0048]

[0049] The above formula is a dilution based on the final concentration that customers would add to the product after it is sold to them. In the actual sales process, no water will be added; the above raw materials will simply be mixed together before being sold.

[0050] Comparative Examples 1-5

[0051] The preparation process of the reference embodiment is described in Table 2;

[0052] Table 2 Formula Table (Unit: g)

[0053]

[0054] Performance testing

[0055] Test item: Measurement of hair moisture content during secondary evaporation

[0056] Test Basis: The water retention capacity of hair is evaluated based on the measurement of its water content. Hair samples were dried using a commercially available hair dryer for approximately 40 minutes (assuming a temperature of 65℃). Then, they were heated at 180℃ for 30 minutes to evaporate all the moisture in the hair. The stable value after 30-40 minutes of heating is designated as A, and the stable value after 60-70 minutes is designated as B. These values ​​are then used in the formula below to calculate the secondary evaporation moisture rate.

[0057] Calculation formula: Secondary evaporation moisture percentage (% dry weight basis) = (AB) / B * 100%

[0058] Testing instrument: Electronic moisture meter

[0059] Test method:

[0060] 1. Test hair was bleached;

[0061] 2. Treat each group of hair with conditioner (Examples 1-10, Comparative Examples 1-4) for 10 minutes, rinse with running water (40℃, 1 min), and dry; the blank group was washed with water.

[0062] 3. Perform secondary evaporation water rate determination;

[0063] The results of the moisture content determination of hair secondary evaporation are shown in Table 3 below;

[0064] Table 3 Results of moisture content determination for secondary evaporation of hair

[0065]

[0066]

[0067] Test Item 2: Hair Strength Measurement

[0068] Testing instrument: High-sensitivity hair tensile testing machine

[0069] Test range: 5cm

[0070] Speed: 1.0 mm / sec.

[0071] Measurement environment: Humidity 58±2%, Temperature 25℃

[0072] Measurement method:

[0073] 1. Test hair was bleached;

[0074] 2. Test the cross-sectional area of ​​the hair, divide it into 15 groups of 20 hairs each, and make the average cross-sectional area of ​​each group equal.

[0075] 3. Treat each group of hair with conditioner (Examples 1-10, Comparative Examples 1-4) for 10 minutes, rinse with running water (40℃, 1 min), and dry; the blank group was treated with water.

[0076] 4. Conduct strength tests;

[0077] The results of the hair strength test are shown in Table 4 below;

[0078] Table 4 Results of hair strength measurement

[0079]

[0080]

[0081] Test Item 3: Hair Curvature Strength Measurement

[0082] Testing instrument: Pure curvature tester

[0083] Test environment: Humidity 40±5%, Temperature 24±0.5℃

[0084] Test method:

[0085] Cross-sectional area measurements were performed on hair with a flatness ratio below 120%.

[0086] Divide the materials into 15 groups of 50 each, ensuring that the average cross-sectional area of ​​each group is equal, and then make them into thin sheets 2.5 cm wide.

[0087] Each group of hair conditioners (Examples 1-10, Comparative Examples 1-4) was used for 1 minute, rinsed with running water, fixed vertically, and dried; the blank group was treated with water.

[0088] The results of the hair bending strength test are shown in Table 5 below;

[0089] Table 5 Results of hair bending strength test

[0090]

[0091]

[0092] Test Item 4: Hair Dye Bleaching Test

[0093] Test method:

[0094] 1. Test hair for color removal treatment.

[0095] 2. Treat the test hair with each group of conditioners (Examples 1-10, Comparative Examples 1-4) for 30 minutes and then dry; the blank group was treated with water.

[0096] 3. Treat test hair with hair dye for 30 minutes.

[0097] 4. After washing, perform color difference measurement (repeat 7 times).

[0098] The results of the hair dye fading test are shown in Table 6 below;

[0099] Table 6 Results of Hair Dye Bleaching Test

[0100]

[0101]

[0102] Results analysis:

[0103] As can be seen from the tests in Examples 1-5, the more hydrolyzed keratin 1 is used, the stronger its water retention capacity, tensile strength, bending strength, and the stronger its ability to inhibit hair dye fading.

[0104] As can be seen from the tests in Examples 6-10, the addition of hydrolyzed keratin PG-propylmethylsilanediol, hydrolyzed keratin 2, and hydrolyzed collagen can promote various functions of hair. However, to achieve the best performance, hydrolyzed keratin PG-propylmethylsilanediol and / or a combination of the three should be used, as the synergistic effect is optimal.

[0105] As can be seen from Comparative Examples 1-4, when either hydrolyzed collagen PG-propylmethylsilanediol or hydrolyzed keratin 1 is missing, the ability is reduced to varying degrees. This indicates that in order to achieve the effect of the present invention, the thermal film-forming properties of the hair exterior, the binding and surface disulfide bond repair capabilities of the hair surface, and the penetration and disulfide bond repair capabilities within the hair are closely related.

[0106] From Examples 6, 9, and 10, it can be further inferred that hydrolyzed keratin PG-propylmethylsilanediol also has good disulfide bond repair capabilities, but it does not have the same internal retention capability as small molecule hydrolyzed keratin. Therefore, the improvement in its disulfide bond repair level can only be achieved with the presence of small molecule hydrolyzed keratin.

[0107] Figure 2 Microscopic photographs of the composition of Example 1 of the present invention after being used as a hair conditioner on hair are provided; Figure 3 Microscopic photographs of the composition of Comparative Example 1 of the present invention after being used as a hair conditioner on hair are provided;

[0108] As can be seen, Example 1 penetrates the hair more quickly, evenly, and thoroughly, which further illustrates that the hydrolyzed keratin of the present invention with an average molecular weight of 400 has a better penetration effect than hydrolyzed keratin with an average molecular weight of 10,000, and can work better with hydrolyzed collagen PG-propylmethylsilanediol to penetrate the hair.

[0109] In addition, the present invention also provides a shampoo that can be used with the compositions of any of the above embodiments and comparative examples.

[0110] The specific formula can be found in Table 7;

[0111] Table 7 Formula Table

[0112]

[0113] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A hair care composition based on disulfide bond repair, characterized in that, It is composed of hydrolyzed collagen PG-propyl methylsilanediol with an average molecular weight of 2200 Daltons, hydrolyzed keratin with an average molecular weight of 400 Daltons, hydrolyzed keratin PG-propyl methylsilanediol with an average molecular weight of 1200 Daltons, hydrolyzed keratin with an average molecular weight of 10000 Daltons, and hydrolyzed collagen with an average molecular weight of 2000 Daltons. The weight ratio of the hydrolyzed collagen PG-propyl methylsilanediol with an average molecular weight of 2200 Daltons, the hydrolyzed keratin with an average molecular weight of 400 Daltons, the hydrolyzed keratin PG-propyl methylsilanediol with an average molecular weight of 1200 Daltons, the hydrolyzed keratin with an average molecular weight of 10000 Daltons, and the hydrolyzed collagen with an average molecular weight of 2000 Daltons is 5:5:1:1:

1.

2. A product applied to hair, characterized in that, Contains 0.05 to 10 wt% of the hair care composition as described in claim 1 and the balance being water.

3. The product for hair application according to claim 2, characterized in that, The product in question is one of the following: shampoo, conditioner, or dry shampoo spray.

4. Use of a hair care composition as described in claim 1 to prepare a product applied to hair.

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