Composition with long-acting hair protection effect and hair product

Abstract

The invention belongs to the field of daily chemicals, and particularly provides a composition with a long-acting hair protection effect. According to the composition, organic silicon resin modified waterborne polyurethane (MQWPU) and hydrolyzed keratin are blended, repairing and protecting synergism is achieved, damaged hair can be effectively repaired for a long time, the composition is applied to hair products, the damaged hair is deeply repaired from the source, the hair is protected for a long time, both symptoms and root causes are treated, and the health state of the hair is restored.

Description

Technical Field

[0001] The invention belongs to the field of daily chemicals. Background Art

[0002] The structure of hair: Hair grows in cylindrical follicles. The part above the skin is called the hair shaft, and the part inside the follicle is the hair root. The vast majority of hair is the hair shaft, which is composed of three parts, from outside to inside, namely the cuticle, cortex and medulla. The cuticle is the outer surface of the hair. It is generally composed of 6-10 layers of scale cells that are folded alternately to form a scale-like structure. It has a complex structure, including the epidermis, the inner epidermis and the outer epidermis. It has the characteristics of a tight structure. They work together to control the growth and renewal of hair. The epidermis and the outer epidermis contain more sulfur proteins. Therefore, the cuticle has the function of resisting external damage caused by physical or chemical reasons. Its role is to protect the cortex and give the hair luster and elasticity. Healthy and undamaged cuticles are smooth and orderly under a scanning electron microscope. The cuticles of damaged hair will be warped, sunken or broken, etc., so the hair is relatively rough and dull. The cuticle is a key part of hair care. The hair cortex is the most important component of the hair. It is located outside the medulla layer and is the outer structure of the hair with a diameter of about 2μm to 3μm. The area of ​​the hair cortex accounts for about 82% of the total cross-section of the hair. It is composed of multiple fibrils, fine fibers and coarse fibers. The thickness of the hair is mainly determined by the cortex layer. It is composed of 2 to 3 strands of keratin through α-helices to form fibrils. As the number increases, the fibrils are entangled into fine fibers, and then the fine fibers form thicker coarse fibers. Studies have shown that the above fibers are wrapped with a cell matrix composed of proteins and form a very compact fiber bundle structure. The color of human hair is determined by the pigment contained in the cortical cell matrix. The hair medulla is the central part of the hair, accounting for only about 3% of the total cross-section of the scalp. It does not exist continuously in the hair shaft, and some hair even has no medulla layer. The structure varies from person to person. In the current study, although the specific role and function of the medulla layer is still unclear, the structure of human hair fibers will not be damaged by the disappearance of the medulla layer. Therefore, the influence of this structure is not considered in the hair care mechanism for the time being.

[0003] Chemical composition of hair: Hair is a high molecular fiber formed by completely keratinized keratinocytes, mainly composed of protein (keratin), pigment particles, water, lipids, and trace elements. (1) α-keratin is the main structural component of hair fibers, accounting for more than 80%. The characteristic of α-keratin is that cystine and cysteine ​​occupy a high proportion in the entire peptide chain. Its basic structure is the same as that of the peptide chain. The peptide chains of these amino acids (-CO-NH-) are cross-linked through spiral and spring structures. There is a sulfhydryl group (-SH) on the side chain of cysteine. The sulfhydryl group is a group with very active chemical properties: when the protein is hydrolyzed, two cysteine ​​residues will be connected by a disulfide bond to generate cystine. The disulfide bond is a covalent bond. This covalent bond is stronger than a non-covalent bond and can be formed within the same peptide chain or between different peptide chains. The disulfide bond-rich cross-linking structure plays an important role in stabilizing the three-dimensional structure of α-keratin in hair fibers. It is the determining factor of hair strength and can give hair toughness and maintain strength. (2) Cell membrane complex (CMC) is a layer of cell membrane complex that mainly exists between the hair cuticle cells and between the hair cuticle cells and cortical cells. The lipid distribution of CMC reaches 57% of the entire hair shaft fiber and is an important structural lipid component of hair. The lipid components of CMC can be covalently linked to amino acids and combined with proteins to form lipoproteins, which are distributed between the hair cuticle cells and between the hair cuticle cells and cortical cells to form a continuous network structure, which is crucial to maintaining the stability of the hair cuticle structure. This layer of lipid plays an important role in reducing the friction performance of the hair surface and makes the hair cuticle present a certain hydrophobic property, providing the hair with the advantage of maintaining a certain moisture content and clean state.

[0004] The main types of hair damage are physical damage, chemical damage, thermal damage and light damage. Physical damage refers to the damage to the hair caused by external forces. One of the external forces that cause hair damage is the excessive pulling force caused by the comb when combing the hair and the friction caused by the comb teeth. Repeated combing can easily cause damage to the hair scales, and in extreme cases, it can cause split ends. Chemical damage refers to the damage caused by chemical reactions in the hair that cause changes in the keratin structure that makes up the hair. Substances that can cause chemical reactions include perms, hair dyes and bleaches. During the chemical treatment process, the hair is exposed to an alkaline environment, causing the hair scales to open, allowing chemicals to pass through the hair scales, and eventually destroying the disulfide bonds and degrading the proteins in the hair, which will cause the hair strength to decrease, and the damaged hair will lose its luster and become rough, brittle and split. Perming will change the secondary conformation of keratin inside the hair, and the α-helix structure will be transformed into irregular curls. As the content of α-helix in the hair gradually decreases, the hair tensile properties are low. Thermal damage refers to the excessive temperature of hair dryers, curling irons, straightening irons and other styling tools, which causes the moisture in the hair fiber to quickly move to the surface, but it cannot evaporate at a fast enough rate, thus causing the hair scales to bulge. Photodamage refers to the long-term exposure of hair to visible light and ultraviolet radiation in the sun, which leads to hair protein loss, lipid oxidation, amino acid degradation, melanin degradation, decreased mechanical properties, decreased combing properties, etc.

[0005] Hair can be damaged in various ways, and the hair scales of the hair cuticle will be the first to be damaged, which will then cause the internal keratin to be exposed, damaged or lost, resulting in dry, rough, tangled, brittle, dull and other damage to the hair. Therefore, the hair scales of the hair cuticle are the key parts of hair care. Commercially available products for repairing damaged hair are generally composed of silicone oil and cations. Silicone oil is spread on the surface of hair by low surface tension, and cations are adsorbed on the surface of hair by static electricity. Short-term use can effectively improve the smoothness of hair, but long-term use will cause accumulation, making the hair heavier and heavier, and producing a sticky feeling. Over time, the hair condition will deteriorate and become brittle. There are also protein hair products used as repair compositions. Although they can solve the problem of hair damage in the short term, this sacrificial protective film is not long-lasting. Therefore, commercially available hair care products can only treat the symptoms of damaged hair, not the root cause, and are not suitable for long-term use and have no lasting effect. Technical implementation elements: In response to the above problems, this technology combines the structure and chemical composition of the hair to identify the key factors that cause hair damage. Starting from the source, it works in synergy with "repair" and "protection". The so-called "repair" refers to the mending effect, which makes up for the problem that the protein inside the hair has been damaged. The so-called "protection" refers to the protective effect, which forms an outer membrane to organize the hair, seals the hair, deeply repairs damaged hair, and protects the hair for a long time. It treats both the symptoms and the root causes and restores the hair to a healthy state.

[0006] The design idea of ​​the present invention is to construct a protective film on damaged hair, while repairing and caring for hair. Initially, the traditional cosmetics industry used a large number of water-soluble natural and synthetic polymer materials as film-forming materials. These natural or synthetic water-soluble polymers have their advantages in the application of the cosmetics industry, but they also have some defects. The quality of pure natural water-soluble polymers is unstable and is easily deteriorated by bacteria and mold. Synthetic and semi-synthetic water-soluble polymers are generally hygroscopic and sticky, and lack mechanical strength, elasticity and adhesion, and soft feeling customer experience; later, the new raw material polyurethane (PU) began to be used in the cosmetics industry because it can synthesize polymer materials with a wide range of properties, is not easy to mold and deteriorate, and has a smooth and non-sticky surface. However, traditional solvent-based polyurethanes are insoluble in water and are difficult to use in cosmetics. Waterborne polyurethane (WPU) introduces hydrophilic groups and uses water as a dispersion medium, which can significantly reduce volatile organic compounds (VOCs). However, after the WPU is modified by introducing hydrophilic groups, the water resistance of polyurethane is greatly affected, and the thermal stability of the hydrophilic groups affects the heat resistance of waterborne polyurethane. Therefore, in order to maintain the long-term protective effect of the protective layer on hair, it is necessary to improve the water resistance and heat resistance of WPU. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a composition with a long-term hair protection effect. The composition is a mixture of organic silicone resin modified waterborne polyurethane (MQWPU) and hydrolyzed keratin, which can effectively repair damaged hair for a long time by synergizing "repair" and "protection". The composition is applied to hair products, which can repair damaged hair from the source, protect hair for a long time, treat both the symptoms and the root causes, and restore the hair to a healthy state.

[0008] The technical solution adopted by the present invention to solve the above problems is as follows:

[0009] The invention discloses a composition with the function of protecting hair in a long term, comprising waterborne polyurethane modified by organic silicon resin and hydrolyzed keratin.

[0010] The preparation process of silicone resin modified waterborne polyurethane (MQWPU) is as follows: Si-H bonded silicone resin (HMQ) is synthesized under acidic conditions using hexamethyldisiloxane (MM), tetraethyl orthosilicate (TEOS) and tetramethyldisiloxane (HMM) as raw materials. Then, hydroxyl functionalized silicone resin (MQ-OH) is obtained by the hydrosilylation reaction between HMQ and 2-(allyloxy)ethanol. MQ-OH reacts with polypropylene glycol (PPG), polyethylene chloride (PEC), isophorone diisocyanate (IPDI) and dimethylol propionic acid (DMPA) to finally generate MQWPU. MQWPU not only improves the microphase separation and hydrogen bond strength of WPU, but also increases the density of chemical crosslinking, thereby improving mechanical properties and enhancing surface hydrophobicity. Therefore, silicone resin provides a new method for improving the hydrophobic properties of waterborne polyurethane without compromising its mechanical properties.

[0011] Furthermore, the molecular weight of the hydrolyzed keratin is preferably 1000-4000 Daltons.

[0012] The hydrolyzed keratin in the present invention acts as an inner membrane "repair layer" to repair the damaged protein inside the hair. The protein adsorbed on the hair maintains its three-dimensional structure, which is roughly the same as the mechanism of coagulation. When the molecular weight is low (1000-4000 Daltons), factors such as ionic bonds, hydrogen bonds, and hydrophobic structures that increase van der Waals forces affect its adsorption on the hair; when the molecular weight does not reach a certain value (less than 1000 Daltons), these factors cannot be fully exerted; if the molecular weight is too large (greater than 4000 Daltons), the penetration and diffusion into the hair is reduced. Through experimental research on the film-forming properties, adsorption on the hair, and penetration into the hair of different molecular weights, a comprehensive analysis is conducted. Further, the molecular weight of the hydrolyzed keratin is preferably 2500-3500 Daltons.

[0013] Furthermore, the mass ratio of the organic silicone resin modified waterborne polyurethane to the hydrolyzed keratin is 0.5-1.5:2-4.

[0014] Furthermore, the mass ratio of the silicone resin modified waterborne polyurethane to the hydrolyzed keratin is 1:3.

[0015] A hair product comprising 1-5% of the long-acting hair protection composition according to any one of claims 1-4.

[0016] The hair product can be a shampoo product or a hair care product.

[0017] A hair composition comprising the following components in percentage by weight:

[0018] (A) 1-5% of the above-mentioned long-lasting hair protection composition;

[0019] (B) anionic surfactant 8-20%;

[0020] (C) 2-6% amphoteric surfactant;

[0021] (D) 1-3% nonionic surfactant;

[0022] (E) Liquid crystal phase inducing structuring agent 0.5-10%

[0023] (F) Moisturizer 0.1-2%

[0024] (G) Make up to 100% with pure water.

[0025] Among them, the anionic surfactants suitable for the present invention include, for example, alkyl alcohol sulfates, alkyl alcohol polyether sulfates, alkyl-aromatic sulfonates, sulfosuccinates, fatty acyl taurates, fatty acyl amino acid salts, etc. As the commonly used anionic surfactants of the present invention, for example, one or two of alkyl polyoxyethylene ether sulfates, fatty acid monoglyceride sulfates, fatty alcohol ether sulfosuccinate salts, N-fatty acyl amino acid salts, fatty acyl methyl taurates, and fatty acyl methyl taurine taurates, it is well known in the art that such anionic surfactants have a large critical stacking parameter, and surfactants with a large critical stacking parameter help reduce the irritation of the overall system. The applicant has found through experiments that anionic surfactants with increased hydrophilic groups (ethoxylation) are more stable and less prone to precipitation in system applications, and the surface activity of ethoxylation is significantly improved compared to the surface performance of a single component, and the compounding of ethoxylated alkyl polyoxyethylene ether sulfates and N-fatty acyl amino acid salts can optimize the micelle morphology formed by the surfactant and reduce the irritation to the skin. It is further preferred that the anionic surfactant of the present invention is an alkyl polyoxyethylene ether sulfate and an N-fatty acyl amino acid salt. In particular, the alkyl polyoxyethylene ether sulfate conforms to the following structure:

[0026] RO(C2H4O)nSO3-M+

[0027] Wherein, R is a C8-C18 alkyl group, preferably, R is a C12-C14 alkyl group, n is the degree of ethoxylation, n is greater than or equal to 0, preferably, n is greater than or equal to 1 and less than or equal to 2. M is a monovalent cation.

[0028] Among them, the amphoteric surfactant used in the present invention, for example: alkyl betaine, acyl ethylenediamine derivatives, sulfo betaine. The amphoteric surfactant used in the present invention, such as cocamidopropyl betaine, cocamidopropyl hydroxysulfo betaine, sodium lauroamphoacetate, sodium cocoamphoacetate, sodium lauroamphodiacetate, sodium cocoamphodiacetate, etc. More preferably, the amphoteric surfactant used in the present invention is alkylamidopropyl betaine, and the content is 1-5%.

[0029] The present invention adds a nonionic surfactant, which is beneficial to the formation of a structured surfactant. Suitable nonionic surfactants for the present invention include, for example, fatty alcohol polyether-n, alkyl polyglycosides, ethoxylated oils and greases, alkyl alcohol amides, lipids, PEG-n glycerol fatty acid esters, alkyl amine oxides, lipids, etc. It is further preferred that the nonionic surfactant used in the present invention is an alkyl polyglycoside, and it is further preferred that the nonionic surfactant used in the present invention is cocamide MEA and cocamide methyl MEA, wherein the content of cocamide MEA is 1-2%, and the content of cocamide methyl MEA is 0.5-1%.

[0030] In the present invention, the liquid crystal phase induced structurant exhibits shear thinning rheological properties and can suspend water-insoluble or partially water-soluble ingredients. Some compounds with long-chain alkyl groups can be dissolved in the formula components at high temperatures, but when cooled to room temperature, they crystallize to form a network structure, and have rheological properties similar to solids when stationary. When the composition is poured, the force generated is higher than the plastic stress, and the composition can be in a flowing state, and can be added to the components alone or mixed with other substances. Compared with traditional suspending agents, liquid crystal phase induced structurants are more stable, and this type of structured surfactant system is not affected by ions in the formula. Adding a certain amount of liquid crystal phase induced structurant together with the surfactant promotes the formation of this structured surfactant system. The crystallization to form a network structure can give the long-term hair protection composition of the present technology a certain suspension effect, and assist the effective active substances such as moisturizing and conditioning in the composition to be evenly and stably suspended in the product system. The structurant used in the present invention is alkyl fatty acid monoethanolamide and trihydroxystearin. Among them, the alkyl fatty acid monoethanolamide is 0.5-0.8%, and the trihydroxystearin is 0.3-0.8%.

[0031] The moisturizing agent is one or more of panthenol, sodium PCA, saccharide isomers, betaine, niacinamide, and vitamin B6, which serve as moisturizing factors and play a role in moisturizing and nourishing.

[0032] In addition to the above-mentioned essential ingredients, the present invention may also contain at least one of the following components:

[0033] Sunscreen: 0.01-5%, ethylene glycol distearate is preferred in the present invention;

[0034] Preservatives: 0.01-1%;

[0035] pH adjuster: 0.001-2%

[0036] Fragrance agent: 0.01-3%;

[0037] Viscosity regulator: 0.01-4%;

[0038] The configuration method used above is a conventional configuration and mixing technology and will not be described in detail here.

[0039] The present invention has the following beneficial effects:

[0040] The present invention creatively blends hydrolyzed keratin and MQWPU into a composition, which is applied to products for repairing damaged hair. The composition has a long-lasting hair protection effect and can be widely used in hair care products in the cosmetics field, and can effectively enhance the hair repairing effect of the hair care products.

[0041] The present invention is based on the key factors that cause damage according to the structure and chemical composition of hair, starting from the source:

[0042] 1. Hydrolyzed keratin is used as the inner membrane "repair layer" to play a "repair" role, making up for the problem that the protein inside the hair has been damaged. Hydrolyzed keratin can repair the broken cuticle inside the hair, increase the thickness, increase the α-helix peak area, increase the relative helix content, improve the hair structure and make the hair grow thicker. Because the cuticle of the damaged hair is damaged, the protein is exposed, the hydrophilicity of the hair is increased, and it is easy for water-soluble proteins to bind to form a covering film to protect the hair, which significantly reduces the damage of protein and lipids in the hair under ultraviolet or oxidative pressure, has a certain degree of protection against light damage, and can penetrate into the rough parts to help make up for the lost keratin of the hair, restore the original state of the hair, and improve its softness and combing performance, playing a repairing role.

[0043] 2. MQWPU is used as the outer film "protective layer" to play a protective role, forming an outer film to trim the hair, and the sealing layer protects the hair, with the synergy of "repair" and "protection", to deeply repair damaged hair. The silicone resin (MQ) modified by MQWPU is an organic-inorganic hybrid polysiloxane with a dense double-layer structure. The inner layer is composed of an inorganic core composed of highly cross-linked tetrafunctional siloxane units (SiO4 / 2), and the chemical structure is similar to SiO2; the outer layer is composed of monofunctional siloxane segments (R3SiO1 / 2), and the organic layer improves the compatibility of MQ with polymers. MQ has high heat stability because of its structural characteristics: (1) The bond angle of Si-O-Si is larger than that of COC; (2) The bond length of Si-O is longer than that of COC and CC; (3) The rotational freedom of Si-O bond is larger than that of CC; (4) The freely rotatable methyl group can turn to the surface and create vacant space for the polymer chain. The bond energy of Si-O in silicone is 452kJ / mol, which is greater than the bond energy of CC 348kJ / mol, so Si-O is more stable than CC bond. In Si-O bond, the relative electronegativity difference between silicon atom and oxygen atom is large, and the electronegativity on oxygen atom has a dipole induction effect on hydroxyl group on silicon atom, which can improve the oxidation stability of hydroxyl group connected to silicon atom. As a "protective layer", silicone resin modified waterborne polyurethane (MQWPU) has greatly upgraded the quality of film formation of materials, which can not only improve the heat resistance and stability of "protective layer", but also have hydrophobic skeleton and inorganic core, which can help improve the mechanical properties of "protective layer" and have better support and water resistance for hair. It is attached to hair. Since there is no unsaturated bond in silicone resin molecule, it is not easy to be cracked or cross-linked by ultraviolet rays, and it has a certain degree of protection against light damage.

[0044] The two cleverly achieve the combination effect of 1+1>2. The single hydrolyzed keratin film, this sacrificial protective film is not durable, and the mechanical properties of MQWPU can protect the hydrolyzed keratin; the single MQWPU makes the hair hard, while the hydrolyzed keratin can improve the toughness of MQWPU and keep the hair soft. DETAILED DESCRIPTION

[0045] The features and performance of the present invention are further described in detail below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and are not limitations of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Unless otherwise specified, the test materials, reagents, methods and equipment used in the following examples are conventional test materials, reagents, methods and equipment in the technical field; unless otherwise specified, the test materials and reagents used in the following examples can be obtained from commercial channels.

[0047] Table 1 below shows 3 preferred embodiments and 2 comparative examples.

[0048] Table 1: Components and dosages of Examples and Comparative Examples

[0049]

[0050]

[0051] The following are hair bundle tests and volunteer tests for each embodiment and comparative example in Table 1. Comparative Example 3 is a commercially available product, L'Oréal Paris Hair Strengthening Shampoo, which is a hair product that mainly uses silicone oil (amodimethicone, dimethicone, dimethiconol) and cations (polyquaternium-67, hydroxypropyl guar hydroxypropyl trimethylammonium ammonium) as repairing substances.

[0052] (I) Hair bundle test:

[0053] The combing force, friction, softness, glossiness of damaged dry hair and the static electricity of healthy dry hair before and after using the sample are measured by an instrument, and the hair repair and hair care effects of the shampoo product are verified accordingly. At the same time, the hair repair and hair care effects and the durability of the effects between Examples 1-3 and Comparative Examples 1-3 are compared. The specific steps of the comprehensive test of the hair repair and hair care effects of the product of the present invention (combing force, friction, softness, glossiness, and antistatic test of damaged isolated hair) are as follows:

[0054] 1) Hair bundle selection: Select Asian hair bundles (length 28 cm, width 5.5-6 cm, weight 5.8±0.2 g) from the same batch, with no difference in appearance, and screen out hair bundles with inappropriate basic values ​​to ensure that there are 5 hair bundles for each group of sample tests.

[0055] 2) Hair cleaning: Soak the hair in 5g / L K12 solution, place in a 40℃ constant temperature water bath for 30 minutes, and then rinse with clean water.

[0056] 3) Treatment of damaged hair: Lay the cleaned hair bundle flat in a hair washing basin, add a mixed aqueous solution of 1% hydrogen peroxide and 2% ammonia water, keep it in a HWS26 electric constant temperature water bath at 40°C for 2 hours (turn it over after 1 hour), remove the hair bundle and rinse it with clean water, neutralize it with 10g / L anhydrous citric acid for 5 minutes, comb the wet hair bundle gently with a comb, hang it in a constant temperature and humidity room for more than 1 hour, until it is dry. Then put it in a constant temperature and humidity box for more than 24 hours. Re-weigh the hair bundle, and select the hair bundle with a weight adjusted to 5.8±0.2g for the next step.

[0057] 4) Combing force test: Turn on the hair combing instrument, set the instrument displacement to 245mm, and the speed to 300mm / min, and test the combing force curve of each hair bundle, ensuring that the starting point of each hair bundle test is the same. Repeat the test 3 times for each hair bundle, and the average value is used as the combing force basic value of the hair bundle. Select 5 hair bundles with similar basic values ​​for testing.

[0058] 5) Softness test: Adjust the starting point of the hair combing instrument, set the instrument displacement to 140mm, and the speed to 300mm / min, test the softness curve of each hair bundle, and ensure that the starting point of each hair bundle is the same. Repeat the test 3 times for each hair bundle, and the average value is used as the basic value of the softness of the hair bundle. Select 5 hair bundles with similar basic values ​​for testing.

[0059] 6) Friction test: Adjust the starting point of the hair combing instrument, set the instrument displacement to 140mm, and the speed to 300mm / min, test the friction curve of each hair bundle, and ensure that the starting point of each hair bundle is the same. Repeat the test 3 times for each hair bundle, and the average value is used as the basic friction value of the hair bundle. Select 5 hair bundles with similar basic values ​​for testing.

[0060] 7) Glossiness test: Fix the hair bundle with a clamp and comb it with a comb. After the surface of the hair bundle is flattened, place a precision gloss meter on the surface of the flat hair bundle for measurement. Take five test points on each side. Record the basic glossiness value of the hair bundle surface before sampling, and select 5 hair bundles with similar basic values ​​for testing.

[0061] 8) Antistatic test: Turn on the SK-7A dynamic combing machine, select the GXGS program, comb the dry hair 15 times, and then take out the hair. Use the static meter 2.5 cm away from the hair bundle. After the two test red dots on the static meter overlap, wait for two seconds and press the Hold key to read the static data. Measure 10 points on each side, record the basic static value of the hair bundle surface before the sample is taken, and select 5 hair bundles with similar basic values ​​for testing.

[0062] 9) The test samples of Examples 1 to 3 and Comparative Examples 1 to 3 were quantitatively applied to the hair bundles according to the method of use. The hair bundles were exposed to the samples for 1 minute at a ratio of shampoo: water = 1:3, and then rinsed with water at 37°C and a flow rate of 4 litres / minute for 1 minute. The above shampooing operation was repeated, and the hair bundles were exposed to the samples and rinsed twice. The hair bundles were hung in a constant temperature and humidity room at 21±1°C and RH50±10% for more than 1 hour until they were dry. Then they were placed in a constant temperature and humidity box for more than 24 hours.

[0063] 10) Test the combing force, friction, softness, glossiness and antistatic test values ​​of the test samples.

[0064] 11) Calculate the rate of change of each test result.

[0065] Table 2: Change rate of each test result

[0066] Test items / change rate Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Combing force -46％ -40％ -46％ -21％ -32％ -24％ Friction -35％ -31％ -35％ -9％ -12％ -10％ Softness 53％ 35％ 62％ 47％ 20％ 15％ Glossiness 26％ 25％ 25％ 12％ 18％ 13％ Static electricity (absolute value) -92％ -88％ -91％ -36％ -52％ -35％

[0067] (II) Volunteer testing:

[0068] 180 testers aged 18-45 with damaged hair were selected and randomly divided into 6 groups, each with 20 people; the 6 groups of testers were asked to use Examples 1-3 and Comparative Examples 1-3 (cleaning twice a week) respectively. During each washing, according to the length and volume of hair, enough shampoo was taken to the hair scalp and gently rubbed for three minutes, then rinsed with running warm water, and then about 0.5-0.7 times the amount of shampoo used last time was taken again, rubbed again according to the above method, rinsed, and then dried the hair, ending one shampooing and cleaning. During the test, the testers agreed not to use any cosmetics that would affect the results, and not to perform chemical treatments such as hair perming and dyeing. After 8 weeks of testing, the volunteers were asked to fill in the use feeling score based on the comparison of hair quality before and after using the sample, set to 0-100 points, and the higher the score, the better the use experience.

[0069] Table 3:

[0070] Volunteer rating Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Softness 88 72 88 48 31 28 Fluffy 92 62 68 32 41 21 Smoothness 96 90 88 42 56 23

[0071] Test data analysis:

[0072] According to the analysis of the combing force, friction force, softness, glossiness, and antistatic test results in Table 2 above, compared with Examples 1 to 3 and Comparative Examples 1 to 3, the preferred embodiments 1 to 3 of the present technology have good hair repair and hair care effects, can reduce the combing force and friction force of damaged hair, and improve the softness, glossiness and antistatic ability of damaged hair. According to the analysis of the long-term use feeling score results of volunteers in Table 3 above, compared with Examples 1 to 3 and Comparative Examples 1 to 3, the preferred embodiments 1 to 3 of the present technology have good use feelings, and after long-term use, the hair is still kept soft and not hard, fluffy and not flat, smooth and not sticky. Among them, according to the comprehensive analysis of Tables 2 and 3 above, the preferred embodiment 2 of the present technology, the silicone resin modified waterborne polyurethane (MQWPU) and the hydrolyzed keratin are compounded in a ratio of 1:3 to form an inner and outer double film on the hair, which has the best effect of repairing hair and hair care, reducing the combing force and friction force of damaged hair, improving the softness, glossiness and antistatic ability of damaged hair, and the formed film has excellent durability, which can achieve a long-term hair protection effect.

[0073] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0074] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0075] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A composition having a long-lasting hair protection effect, characterized in that: Contains silicone resin modified water-based polyurethane and hydrolyzed keratin.

2. The composition having a long-lasting hair protection effect according to claim 1, characterized in that: The molecular weight of the hydrolyzed keratin is preferably 1000-4000 Daltons.

3. The composition having a long-lasting hair protection effect according to claim 2, characterized in that: The molecular weight of the hydrolyzed keratin is further preferably 2500-3500 Daltons.

4. The composition having a long-lasting hair protection effect according to claim 1, characterized in that: The mass ratio of the organic silicone resin modified waterborne polyurethane to the hydrolyzed keratin is 0.5-1.5:2-4.

5. The composition having a long-lasting hair protection effect according to claim 4, characterized in that: The mass ratio of the organic silicone resin modified waterborne polyurethane to the hydrolyzed keratin is 1:

3.

6. A hair product comprising 1-5% of the long-term hair protection composition according to any one of claims 1-5.

7. The hair product according to claim 6, which can be a shampoo product or a hair care product.

8. The hair product according to claim 7, characterized in that: The hair product is a shampoo product, containing the following components in percentage by mass: (A) 1-5% of the long-lasting hair protection composition according to any one of claims 1 to 4; (B) anionic surfactant 8-20%; (C) 2-6% amphoteric surfactant; (D) 1-3% nonionic surfactant; (E) Liquid crystal phase inducing structuring agent 0.5-10% (F) Moisturizer 0.1-2% (G) Make up to 100% with pure water.

9. The hair product according to claim 8, characterized in that: The shampoo product further contains at least one of the following components in percentage by mass: sunscreen: 0.01-5%; preservative: 0.01-1%; pH regulator: 0.001-2%; flavoring agent: 0.01-3%; and viscosity regulator: 0.01-4%.

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