A water-based composition for skin or hair care and its application

Abstract

This invention belongs to the field of cosmetic technology and discloses a skin care and hair care liquid composition of water-based polyurethane-10 and type III collagen. This invention combines water-based polyurethane-10 and type III collagen in a specific ratio, utilizing the residual NCO groups (or urea groups, carbamate groups) in polyurethane-10 to form a strong hydrogen bond cross-linking network with the amino and carboxyl groups in collagen molecules. This allows the collagen to firmly adhere to the skin or hair surface, while simultaneously softening the stratum corneum, resulting in a smooth skin feel and achieving multiple effects such as long-lasting moisturizing, improved elasticity, and wrinkle concealing.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to a skin care and hair care liquid composition of water-based polyurethane-10 and type III collagen. Background Technology

[0002] As consumers increasingly demand higher efficacy from cosmetics, multi-purpose products that combine skincare and haircare functions are gaining widespread attention. Water-based skincare products (such as gels, jelly masks, and liquid masks) are particularly popular due to their light texture and ease of use. However, existing products generally suffer from the following technical deficiencies: The active ingredients have a short retention time: The active ingredients in traditional water-based products (such as collagen, hyaluronic acid, etc.) have weak adhesion to the skin or hair, are easily washed away or lost, and are difficult to achieve long-lasting care. Achieving both a pleasant feel and effective results is often difficult: Adding high-molecular-weight polymers to enhance film formation often results in a thick, tight, and non-breathable film, negatively impacting the user experience. Conversely, pursuing a refreshing feel leads to insufficient duration of efficacy. Limitations of collagen application: Type III collagen has good moisturizing and repair properties, but its molecular structure is easily degraded and has poor film-forming properties when used alone. It cannot form a long-lasting protective film on the skin surface, nor can it form a uniform adhesion on the hair. Lack of synergistic design: Most existing products are simple mixtures that do not make full use of the intermolecular interactions between different components, such as hydrogen bonds and cross-linking, resulting in low utilization of active ingredients and limited performance improvement.

[0003] The existing technology CN107126379A uses a mixture of water-soluble polyurethane and inorganic powder (kaolin). The polyurethane is used to help the powder adhere to the skin. The addition of powder materials makes it easier to cause a grainy and dry feeling, and physical separation is very likely to occur in emulsion or water-oil system.

[0004] The prior art CN114452230A discloses a moisturizing film-forming composition of polyurethane-7 and pyrrolidone carboxylic acid humectant. This invention uses polyurethane-7 (different types of polyurethane) and small molecule humectant to form a film, in which polyurethane-7 itself forms a film and the humectant is dispersed.

[0005] Existing technology CN113081899A uses a polyurethane film-forming agent to encapsulate functional powders (such as pigments and oil-absorbing powders) for makeup setting, focusing more on makeup effects such as long-lasting setting and oil control. Summary of the Invention

[0006] The purpose of this invention is to overcome at least one deficiency of the prior art and to provide a water-based composition for skin or hair care and its application.

[0007] The technical solution adopted in this invention is: In a first aspect, the present invention provides a water-based composition for skin or hair care, the water-based composition comprising aqueous polyurethane-10 and type III collagen; The weight ratio of the aqueous polyurethane-10 to type III collagen is 5000:1 to 1:10; and the total weight of the aqueous polyurethane-10 and type III collagen is less than 19.8% of the total weight of the composition.

[0008] In some instances, the weight ratio of the aqueous polyurethane-10 to type III collagen is 1000:1 to 1:5.

[0009] In some instances, the weight ratio of the aqueous polyurethane-10 to type III collagen is 500:1 to 1:2.

[0010] In some instances, the waterborne polyurethane-10 is an aliphatic polyurethane-10 dispersion with a weight-average molecular weight of 50,000 to 200,000 and a solid content of 20-40%.

[0011] In some instances, the type III collagen is recombinant humanized type III collagen with a molecular weight of 30,000 to 300,000 and a purity of ≥95%.

[0012] In some instances, the aqueous composition further comprises excipients, which include one or more of water, polyols, humectants, thickeners, and preservatives.

[0013] In some instances, the polyol is selected from one or more of glycerin, butylene glycol, propylene glycol, and 1,2-hexanediol; the humectant is selected from one or more of sodium hyaluronate, trehalose, and betaine; and the thickener is selected from one or more of carbomer, xanthan gum, and hydroxyethyl cellulose.

[0014] In some instances, the aqueous composition comprises 3% by weight of aqueous polyurethane-10 and 0.1% by weight of type III collagen.

[0015] In a second aspect, the application of the aqueous composition provided in the first aspect of the present invention in the preparation of skin care products is characterized in that the skin care products include gels, jelly, facial mask liquids, serums, lotions, and creams.

[0016] Thirdly, the application of the aqueous composition provided in the first aspect of the present invention in the preparation of hair care products, characterized in that the hair care products include conditioner, hair mask, leave-in serum, and spray.

[0017] The beneficial effects of this invention are: This invention combines waterborne polyurethane-10 with type III collagen in a specific ratio. The residual NCO groups (or urea groups, urethane groups) in polyurethane-10 form a strong hydrogen bond cross-linking network with the amino and carboxyl groups in the collagen molecules, allowing the collagen to adhere firmly to the skin or hair surface. At the same time, it softens the stratum corneum, bringing a smooth skin feel and achieving multiple effects such as long-lasting moisturizing, elasticity improvement, and wrinkle concealing.

[0018] Regarding film-forming durability, the NCO groups (or urea groups, urethane groups) in polyurethane-10 form a strong hydrogen bond cross-linking network with the amino and carboxyl groups in collagen molecules, allowing collagen to firmly adhere to the skin or hair surface. After rinsing with water for 30 seconds, the collagen residue rate can still reach over 80%, completely solving the industry problem of easy loss and difficulty in retention of active ingredients in traditional collagen products.

[0019] In terms of membrane performance, the resulting composite membrane exhibits excellent elasticity, showing no visible cracks under 20% tensile strain and a resilience rate exceeding 90%. This characteristic allows the membrane to adapt to dynamic skin movements (such as facial expressions and body movements) without breaking, while maintaining good integrity.

[0020] Regarding moisturizing performance, this invention achieves a dual moisturizing mechanism: polyurethane-10 forms a breathable moisturizing film, reducing transepidermal water loss; collagen exerts its natural hydrophilic moisturizing effect. Tests show that after use, skin moisture content can increase by more than 20%, and transepidermal water loss rate can decrease by more than 15%, achieving long-lasting moisturizing.

[0021] In terms of skin feel, this composition effectively softens the stratum corneum, fills in minor bumps and depressions on the skin surface, improves skin smoothness by more than 30%, and significantly reduces roughness. At the same time, the film layer maintains good breathability (water vapor transmission rate of more than 75%), leaving the skin feeling refreshed and not tight after use, without the heaviness and stuffiness of traditional film-forming agents, bringing a long-lasting smooth and comfortable experience.

[0022] In terms of anti-wrinkle effect, the composite film shrinks moderately during the drying process, which can fill in the grooves of fine wrinkles, visually reducing wrinkles instantly, with a coverage rate of over 50%. Combined with the bioactivity of collagen, it achieves the dual effects of immediate coverage and long-lasting anti-wrinkle effect.

[0023] In hair care, this composition forms a uniform protective film on the hair surface, allowing collagen to adhere for a longer period. Treated hair exhibits a breakage rate reduction of over 30% and a combing resistance reduction of over 40%, achieving the dual benefits of strong, smooth, and easy-to-manage hair. Detailed Implementation

[0024] The waterborne polyurethane of the present invention is obtained by reacting at least one water-insoluble, non-aqueous dispersible isocyanate-functionalized polyurethane prepolymer, at least one amino-functionalized compound, and an alkyltin compound. Within the scope of this invention, the term "water-insoluble, non-aqueous dispersible polyurethane prepolymer" refers to a prepolymer whose solubility in water at 23°C is less than 10 g / L, preferably less than 5 g / L, and which fails to form a sedimentation-stable dispersion in water (especially deionized water) at 23°C. In other words, in any experiment in which it is dispersed in water, the prepolymer precipitates. Here, water refers to deionized water without added surfactants.

[0025] In some embodiments, preferably, the polyurethane prepolymer used in this invention has terminal isocyanate groups, i.e., the isocyanate groups are located at the ends of the prepolymer chains. More preferably, all chain ends of the prepolymer have isocyanate groups.

[0026] The solid content of the polyurethane dispersion used to prepare the cosmetic compositions of the present invention is typically 10-70 wt%, preferably 30-65 wt%, and particularly preferably 40-60 wt%. The solid content is determined by heating a weighed sample to constant weight at 125°C. The solid content is then calculated by reweighing the sample at constant weight. The solid content is substantially equal to the polyurethane content in the polyurethane dispersion.

[0027] Preferably, these polyurethane dispersions contain less than 5 wt%, particularly preferably less than 0.2 wt%, of unbonded organic amines, based on the mass of the dispersion. The content in the cosmetic composition is correspondingly low.

[0028] This invention relates to type III collagen, a biopolymer material with a defined amino acid sequence and higher-order spatial structure prepared through DNA recombination technology. Its chemical structural characteristics are as follows: the core of the protein's primary structure lies in the precise design and optimization of its amino acid sequence to achieve a high degree of "humanization," successfully constructing and stabilizing a biologically active higher-order spatial structure. The type III collagen involved in this invention can be selected from commercially available products such as C3ollababe from Suhua, recombinant superbody type III collagen from KEYIN, and raw materials from the technology source company, Jinbo Biotechnology.

[0029] The polyols suitable for use in this invention may be straight-chain, branched or cyclic, saturated or unsaturated alkyl types, carrying at least two -OH functional groups, especially at least three -OH functional groups, and more particularly at least four -OH functional groups on each alkyl chain.

[0030] The polyols advantageously suited for formulating compositions according to the invention are polyols containing, in particular, 2 to 32 carbon atoms, preferably 2 to 20 carbon atoms, more preferably 2 to 16 carbon atoms, advantageously 2 to 10 carbon atoms, and even more advantageously 2 to 6 carbon atoms.

[0031] According to another embodiment, the polyol suitable for use in the present invention may advantageously be selected from polyethylene glycol.

[0032] According to one embodiment, the compositions of the present invention may include a mixture of polyols.

[0033] Advantageously, the polyol may preferably be selected from C2-C8 polyols, more preferably from C3-C6 polyols. The polyol may be selected from: glycerol, pentaerythritol, trimethylolpropane, ethylene glycol, propylene glycol, 1,3-butanediol, 1,3-propanediol, pentanediol, hexanediol, isopentanediol, dipropylene glycol, diethylene glycol, and diglycerol, ethylhexylglycerol, octyl ethylene glycol and mixtures thereof, glycerol and its derivatives, polyglycerol (such as glycerol oligomers, such as diglycerol), and polyethylene glycol, glycol ethers (especially containing 3 to 16 carbon atoms, such as monopropylene glycol (C1-C4) alkyl ethers, dipropylene glycol (C1-C4) alkyl ethers or tripropylene glycol (C1-C4) alkyl ethers, monoethylene glycol (C1-C4) alkyl ethers, diethylene glycol (C1-C4) alkyl ethers or triethylene glycol (C1-C4) alkyl ethers), and mixtures thereof.

[0034] In particular, the polyol is selected from: glycerol; glycols, preferably propylene glycol, butanediol, pentanediol, hexanediol, dipropylene glycol, diethylene glycol, ethylhexylglycerol, octyl ethylene glycol; glycol ethers, preferably monopropylene glycol (C1-C4) alkyl ethers, dipropylene glycol (C1-C4) alkyl ethers or tripropylene glycol (C1-C4) alkyl ethers, or monoethylene glycol (C1-C4) alkyl ethers, diethylene glycol (C1-C4) alkyl ethers or triethylene glycol (C1-C4) alkyl ethers; and mixtures thereof.

[0035] According to a preferred embodiment of the present invention, the polyol is selected from ethylene glycol, pentaerythritol, trimethylolpropane, propylene glycol, butanediol, glycerol, polyglycerol and polyethylene glycol, and mixtures thereof.

[0036] In a particular embodiment, the polyol is selected from: glycerol; diols selected from propylene glycol, butanediol, ethylhexylglycerol, octyl ethylene glycol; and mixtures thereof.

[0037] According to a particular embodiment, the composition of the present invention comprises at least butanediol, glycerol, or a mixture thereof.

[0038] In a preferred embodiment, the composition includes at least glycerol. Polyhydroxy alcohols, preferably C2-C8 polyhydroxy alcohols, more preferably C3-C6 polyhydroxy alcohols, and preferably, for example, glycerol, propylene glycol, 1,3-butanediol, pentanediol, hexanediol, dipropylene glycol, diethylene glycol, and diglycerol, mixtures thereof, and glycerol and its derivatives are known as humectants or wetting agents.

[0039] The compositions according to the invention may further include additional humectants, preferably sugars or polyhydroxy compounds. The humectants may be selected from sorbitol; glycol ethers (especially containing 3 to 16 carbon atoms), such as monopropylene glycol (C1-C4) alkyl ethers, dipropylene glycol (C1-C4) alkyl ethers or tripropylene glycol (C1-C4) alkyl ethers, monoethylene glycol (C1-C4) alkyl ethers, diethylene glycol (C1-C4) alkyl ethers or triethylene glycol (C1-C4) alkyl ethers; urea and its derivatives, especially hydroxyethyl urea (2-hydroxyethyl urea) sold by National Starch; lactic acid; hyaluronic acid; glycolic acid (AHA); salicylic acid (BHA); sodium pyruvate; xylitol; serine; sodium lactate; alginate and its derivatives; chitosan and its derivatives; the invention preferably includes one or a combination of several of sodium hyaluronate, trehalose, and betaine.

[0040] The thickener is based on the total weight of the cosmetic composition, and one or more hydrophilic gelling agents are present in a weight percentage of about 0-10% by weight. In particular, the hydrophilic gelling agents include water-soluble or water-dispersible thickening polymers. These polymers may be selected in particular from: modified or unmodified carboxyvinyl polymers, such as those sold by Goodrich under the name Carbopol (CTFA name: Carbomer); polyacrylates; polymethacrylates, such as those sold by Guardian under the names Lubrajel and Norgel, or by Hispano Chimica under the name Hispagel; polyacrylamide; optionally crosslinked polyacrylamide; and / or neutral 2-acrylamido-2-methylpropanesulfonic acid polymers and copolymers, such as poly(2-acrylamido-2-methylpropanesulfonic acid) sold by Clariant under the name Hostacerin AMPS (CTFA name: Ammonium polyacrylamide dimethyl taurate); crosslinked anionic copolymers of acrylamide and AMPS in W / O emulsion form, such as those sold by SEPPIC under the name Sepigel 305 (CTFA name: Polyacrylamide / C13-14 isoparaffin / laurate polyether-7) and under the name Simulgel. Products sold under CTFA name 600 (Acrylamide / Sodium Acryloyldimethyltaurate copolymer / Isohexadecane / Polysorbate 80); polysaccharide biopolymers such as xanthan gum, guar gum, sophora gum, acacia gum, scleroglucans, chitin and chitosan derivatives, carrageenan, gellan gum, alginate; cellulose such as microcrystalline cellulose, carboxymethyl cellulose, hydroxymethyl cellulose and hydroxypropyl cellulose; and mixtures thereof.

[0041] According to a specific embodiment, the aqueous phase of the composition comprises at least one neutral 2-acrylamido-2-methylpropanesulfonic acid polymer and copolymer, as well as a polysaccharide biopolymer.

[0042] Preferably, suitable hydrophilic gelling agents for use in this invention include: carboxyvinyl polymers, such as carbomer products, such as Carbomer Ulrez 20 sold by Lubrizol and Pemulen products (acrylate / C10-C30-alkyl acrylate copolymers); polyacrylamide, such as crosslinked copolymers sold by SEPPIC under the trademark Sepigel 305 (CTFA name: polyacrylamide / C13-14 isoparaffin / lauryl ether 7) or Simulgel 600 (CTFA name: acrylamide / sodium acryloyl dimethyl taurate copolymer / isohexadecane / polysorbate 80); 2-acrylamido-2-methylpropanesulfonic acid polymers and copolymers, optionally crosslinked and / or neutral, such as poly(2-acrylamido-2-methylpropanesulfonic acid) sold by Hoechst under the trademark Hostacerin AMPS (CTFA name: ammonium polyacryloyl dimethyl taurate) or Simulgel sold by SEPPIC. 800 (CTFA name: Sodium polyacrylamide dimethyl taurate / polysorbate 80 / sorbitan oleate); copolymers of 2-acrylamido-2-methylpropanesulfonic acid and hydroxyethyl acrylate, such as Simulgel NS and Sepinov EMT 10 sold by SEPPIC; cellulose-based derivatives such as hydroxyethyl cellulose; polysaccharides and, in particular, gums such as xanthan gum; and mixtures thereof.

[0043] More preferably, the hydrophilic gelling agent is selected from acrylate / C10-C30-alkyl acrylate copolymers, carbomer, xanthan gum, carboxyvinyl polymers synthesized in dichloromethane, and ammonium polyacrylamide dimethyl taurate, and mixtures thereof.

[0044] The compositions according to the invention may also contain any conventional cosmetic ingredients, particularly selected from antioxidants, fragrances, preservatives, neutralizers, surfactants, solar filters, vitamins, moisturizers, self-tanning compounds, anti-wrinkle active ingredients, emollients, hydrophilic or lipophilic active ingredients, free radical scavengers, deodorants, multivalent chelating agents, and mixtures thereof.

[0045] The technical solution of the present invention will be further illustrated below with examples.

[0046] All percentages in this invention are weight percentages and are based on 100% by weight of the cosmetic composition of this invention, unless otherwise stated.

[0047] All weights referred to in this invention are the weights of the effective substance. For substances in dispersion form, the weights referred to in this invention are the actual weights of the substance, excluding the weight of the carrier. That is, the weight of the substance in dispersion form as referred to in this invention = weight of the dispersion × content of solid components in the dispersion. For solid substances containing water of crystallization, the weights referred to in this invention are the weights after removing the water of crystallization.

[0048] The waterborne polyurethane-10 (waterborne PU-10) used in this invention is a commercially available aliphatic polyurethane-10 dispersion with a solid content of 30% and a weight-average molecular weight of approximately 100,000, purchased from Kechuang or an equivalent supplier. This polyurethane-10 dispersion contains a small amount of residual NCO groups, which can form hydrogen bonds with the amino and carboxyl groups of collagen.

[0049] The type III collagen used was recombinant humanized type III collagen with a molecular weight of approximately 100,000 and a purity of ≥98%, purchased from Shanghai Yuyun Biotechnology Co., Ltd.

[0050] Comparative Example A (Polyurethane-1 Comparison): Waterborne polyurethane-10 was replaced with polyurethane-1 dispersion with equal solids content (solids content ~35%).

[0051] Comparative Example B (Polyurethane-2 comparison): Waterborne polyurethane-10 was replaced with polyurethane-2 dispersion with equal solids content (solids content ~40%).

[0052] Comparative Example C (Polyurethane-7 comparison): Waterborne polyurethane-10 was replaced with polyurethane-7 dispersion with equal solids content (30% solids content).

[0053] Comparative Example D (Polyurethane-11 comparison): Waterborne polyurethane-10 was replaced with polyurethane-11 dispersion with equal solids content (solids content ~30%).

[0054] Comparative Example E (Polyurethane-35 comparison): Waterborne polyurethane-10 was replaced with a polyurethane-35 dispersion with equal solids content (solids content ~30%). I. Skin Care Gel / Gel Formula

[0055] For ease of comparison, the active ingredients in each skincare example are shown in Table 1. The excipients added are as follows: glycerin 5 parts, butylene glycol 3 parts, sodium hyaluronate 0.1 parts, carbomer 940 0.2 parts, triethanolamine 0.2 parts, 1,2-hexanediol 0.5 parts, and phenoxyethanol 0.5 parts. After adding the active ingredients and excipients, water was added to a final volume of 100 parts. All the above figures are parts by weight.

[0056] Table 1. Composition of Gel Formulation (by weight, based on solid content) serial number Waterborne polyurethane-10 Type III collagen Total content (%) Skincare Example 1 5 0.001 5.001 Skincare Example 2 4 0.02 4.02 Skincare Example 3 3 0.1 3.1 Skincare Example 4 2 0.5 2.5 Skincare Example 5 1 1 2 Skincare Example 6 0.2 2 2.2 Skincare Comparison Ratio 1 5 0 5 Skincare Comparison Ratio 2 0 2 2 Skincare ratio 3 5 0.0005 5.0005 Skincare ratio 4 0.02 2 2.02 Skincare ratio 5 18 1.8 19.8 Skincare ratio 6 20 2 22 Skincare ratio 7 2 2 4 Skincare ratio A / B / C / D / E-1 5 0.001 5.001 Skincare ratio A / B / C / D / E-3 3 0.1 3.1 Skincare ratio A / B / C / D / E-6 0.2 2 2.2 The skincare comparison ratio 8 is a commercially available collagen gel.

[0057] The preparation methods for each skincare example and comparative example include mixing and homogenizing all raw materials. The specific preparation method is as follows (taking skincare example 3 as an example): 1. Add 3.0g of waterborne polyurethane-10 (10g of 30% dispersion based on solid content) and 0.1g of type III collagen to 40g of deionized water and stir until completely dissolved to obtain the functional premix.

[0058] 2. Add 5.0g glycerol, 3.0g butylene glycol, 0.1g sodium hyaluronate, 0.2g carbomer 940, 0.5g 1,2-hexanediol, and 0.5g phenoxyethanol to the remaining deionized water and stir at 40°C until the carbomer is completely dispersed.

[0059] 3. Add 0.2g of triethanolamine to adjust the pH to 6.0-6.5, so that the carbomer thickens and forms a gel matrix.

[0060] 4. Add the functional premix from step 1 to the gel matrix from step 3 and continue stirring for 20 minutes until homogeneous.

[0061] 5. Add deionized water to 100g, stir well, filter, and fill.

[0062] The testing methods for each skincare example and comparative example are as follows: 1. Film-forming durability (collagen residue rate) Method: The sample was evenly coated onto artificial leather (50 μm thick) and dried at room temperature for 30 minutes. It was then rinsed with buffer solution (pH 5.5) for 30 seconds, the rinse solution was collected, and the collagen content was determined (ELISA method). The residual rate was calculated.

[0063] 2. Membrane elasticity test (20% tensile strain) Method: The sample was coated onto an elastic polyurethane substrate (50 μm thick) and dried at room temperature for 24 hours to form a film. The substrate was stretched by 20% and held for 10 seconds, and the cracking was observed under a microscope. The resilience of the film after the stretch was released was also measured.

[0064] 3. Moisturizing test (changes in skin moisture content) Methods: Ten healthy volunteers were recruited, and test areas were marked on the inner forearm. Initial moisture content and TEWL (transient endothelial hydration level) were measured using a skin moisture meter. A sample (2 mg / cm²) was applied, and measurements were taken again after 30 minutes. The rate of increase in moisture content and the rate of decrease in TEWL were calculated.

[0065] 4. Smoothness Test Methods: Skin surface roughness parameters (Ra value) were measured before and after application using a skin roughness tester, and the smoothness improvement rate (Ra value reduction rate) was calculated.

[0066] 5. Wrinkle concealing effect test Methods: Ten volunteers with fine lines around the eyes were recruited. The sample was applied to the area around the eyes, and after 30 minutes, the skin was photographed using the VISIA skin image analyzer. The changes in wrinkle area and depth were calculated to obtain the coverage rate.

[0067] 6. Breathability Test Method: The sample was coated on a breathable membrane (pore size 0.45 μm), dried, and then placed on a test cup containing deionized water. After weighing, the sample was placed in a constant temperature oven at 37℃ for 24 hours, weighed again, and the water vapor transmission rate was calculated and compared with the uncoated area.

[0068] 7. Skin feel evaluation (not tight, smooth) Methods: After volunteers applied the sample, they were given a sensory evaluation score (1-5 points), including tightness, smoothness, stickiness, etc. The higher the final score, the better the skin feel evaluation.

[0069] The specific skincare test results are shown in Table 2 below: The experimental data in Table 2 show that the skincare examples 1-6 within the scope of the claims exhibit excellent overall performance. Through the synergistic effect of aqueous polyurethane-10 and type III collagen, all indicators are significantly improved: collagen residue rate remains stable at 78-92%, elasticity score reaches 4.0-5.0, moisture content increases by 22-35%, and TEWL decreases by 16-26%. Furthermore, smoothness improves by 32-50%, wrinkle coverage reaches 52-72%, breathability remains at 75-88%, and the tightness score (4.0-5.0) also shows excellent comfort. This strongly demonstrates the synergistic effect of the two-component combination.

[0070] Of all the formulations, skincare examples 3 and 4 performed the best. They achieved the optimal balance between film-forming properties and collagen efficacy, particularly in terms of elasticity, durability, and wrinkle coverage.

[0071] By comparing the performance of the individual components, it can be found that although skincare comparison sample 1 had a 65% residue rate, its moisturizing and wrinkle-concealing effects were poor; while skincare comparison sample 2 had decent moisturizing properties, its residue rate was only 40%, and its elasticity score was only 2.0. This indicates that both components are indispensable and must work together to achieve both film formation and skincare benefits.

[0072] The skincare comparison ratios 3-4 show that if the ratio is too small (10000:1) or too large (1:100), the performance will decline significantly, verifying the scientific validity of the ratio range of the present invention.

[0073] Comparative studies 5-6 in skincare revealed the impact of total content on skin feel. When the total content reached close to 20% or 22%, the breathability dropped from 82% in skincare example 3 to 68% and 60%, respectively, significantly affecting comfort. Therefore, keeping the total content below 19.8% is an important prerequisite for ensuring high breathability.

[0074] The results of Comparative Example 7 for skincare showed that simple physical mixing was significantly inferior in performance to Skincare Example 3. This further demonstrates that promoting hydrogen bond cross-linking between components through stirring is a key step in improving product performance, rather than simply adding the ingredients together.

[0075] Comparative Example AE: The residual rate was generally between 55% and 70%. Its ability to improve moisturizing performance, cover fine lines, and improve breathability were significantly lower than those of the embodiments of this invention, but the feeling of tightness was weaker. This indicates that other polyurethane models have weaker interactions with type III collagen, resulting in poorer film-forming stability and durability.

[0076] Table 2 Group Collagen residue rate (%) Elasticity (points) Moisture content increased (%) TEWL decreased (%) Smoothness improved (%) Wrinkle coverage rate (%) Breathability (%) Tension (points) Example 1 82 4.5 22 16 32 52 88 4.5 Example 2 88 5 25 19 38 58 85 5 Example 3 92 5 28 22 42 65 82 5 Example 4 90 5 30 24 45 68 80 5 Example 5 85 4.5 32 25 48 70 78 4.5 Example 6 78 4 35 26 50 72 75 4 Skincare Comparison Ratio 1 65 4 15 8 20 30 80 3.5 Skincare Comparison Ratio 2 40 2 38 28 35 45 92 3 Skincare ratio 3 70 3.5 18 10 25 35 86 3.5 Skincare ratio 4 50 2.5 36 27 40 50 88 3 Skincare ratio 5 95 5 33 25 49 71 68 5 Skincare ratio 6 96 5 34 26 50 72 60 5 Skincare ratio 7 60 3 20 15 28 40 80 3.5 Skincare ratio 8 45 2.5 25 12 22 35 85 3 Skincare Comparison Ratio A-1 66 2.5 15 12 29 31 79 2 Skincare Comparison Ratio A-3 70 3 18 14 34 38 75 2.5 Skincare Comparison Ratio A-6 64 2.5 22 16 39 46 69 2 Skincare Comparison Ratio B-1 61 2.5 14 10 28 27 76 2 Skincare Comparison Ratio B-3 65 3 16 11 33 35 70 2.5 Skincare Comparison Ratio B-6 59 2.5 19 13 37 42 63 2 Skincare Comparison Ratio C-1 61 3.5 15 13 30 32 84 2.5 Skincare ratio C-3 65 3.5 19 15 34 40 78 3 Skincare ratio C-6 59 3 23 16 37 47 71 2.5 Skincare Comparison Ratio D-1 61 3.5 17 12 28 39 84 3 Skincare Comparison Ratio D-3 65 4 21 13 33 45 79 3.5 Skincare Comparison Ratio D-6 59 4 27 15 38 52 73 3 Skincare Comparison Ratio E-1 61 2.5 16 12 30 37 81 2.5 Skincare ratio E-3 65 3 20 16 34 42 76 3 Skincare ratio E-6 59 3 24 19 37 48 70 2.5 II. Hair serum / hair mask formula

[0077] For ease of comparison, the active ingredients in each hair care example are shown in Table 3. The amounts of excipients added are as follows: glycerin 3 parts, propylene glycol 2 parts, polyquaternium-10 0.3 parts, cetearyl alcohol 1 part, and phenoxyethanol 0.5 parts. After adding the active ingredients and excipients, water was added to a total of 100 parts. All the above amounts are parts by weight.

[0078] Table 3. Hair care serum formula composition (weight percentage, based on solid content) serial number Waterborne polyurethane-10 Type III collagen Total content (%) Hair care example 1 4 0.02 4.02 Hair care example 2 3 0.1 3.1 Hair care example 3 2 0.5 2.5 Hair care example 4 1 1 2 Hair care example 5 0.5 2 2.5 Hair care example 6 0.2 2 2.2 Hair care comparison ratio 1 4 0 4 Hair care comparison ratio 2 0 2 2 Hair care comparison ratio 3 4 0.0004 4.0004 Hair care ratio 4 0.02 2 2.02 Hair care ratio 5 18 1.8 19.8 Hair care ratio 6 20 2 22 Hair care ratio 7 2 2 4 The hair care comparison ratio 8 is a commercially available collagen hair mask.

[0079] The specific preparation method is as follows (taking hair care example 2 as an example): 1. Add 3.0g of waterborne polyurethane-10 (10g of 30% dispersion based on solid content) and 0.1g of type III collagen to 40g of deionized water and stir until completely dissolved to obtain the functional premix.

[0080] 2. Add 3.0g glycerin, 2.0g propylene glycol, 0.3g polyquaternium-10, 1.0g cetearyl alcohol, and 0.5g phenoxyethanol to the remaining deionized water, heat to 70°C and stir to emulsify, then cool to 40°C.

[0081] 3. Add the functional premix from step 1 to the emulsion from step 2 and continue stirring for 20 minutes until homogeneous.

[0082] 4. Add deionized water to 100g, stir well, filter, and fill.

[0083] The testing methods for each hair care example and comparative example are as follows: 1. Hair breakage test Methods: Hair strands from healthy individuals were treated with the sample for 30 minutes, then rinsed and dried. The breaking energy of a single hair was measured using a tensile tester and compared with that of untreated hair.

[0084] 2. Combing power test Method: Take a strand of hair from a healthy person, treat it with the sample for 30 minutes, rinse, and dry. Measure the combing force using a combing force tester and calculate the reduction rate.

[0085] 3. Collagen Residue Rate Method: Similar to skincare methods, but using artificial hair instead of artificial leather.

[0086] The test results are shown in Table 4: In the tests of hair care examples 1-6, the residual rate of collagen remained stable, consistently above 70%. Example 2 reached a peak of 91%, indicating that hydrogen bond cross-linking between components was most efficient at this ratio. Observations revealed that with further increases in the proportion of collagen (such as in examples 5 and 6), the residual rate decreased slightly (to 76% and 71% respectively), but remained at a relatively high level overall.

[0087] The breakage resistance improvement rate of hair care examples 1-6 all exceeded 35%. With the increase in collagen content, the strengthening effect became more significant, with example 6 achieving the highest improvement rate of 53%. The reduction in combing strength also increased synchronously with the increase in collagen content, ranging from 46% to 63%. Example 6 demonstrated the best smoothing effect with a reduction rate of 63%.

[0088] Considering all indicators, hair care Example 2 successfully found the optimal balance between collagen residue rate (91%), increased breakage strength (43%), and reduced combing power (53%), achieving a synergistic effect of efficient adhesion and efficacy. In contrast, although hair care Examples 5 and 6 performed better in terms of strength and smoothness, the trade-off was a slight decrease in collagen residue rate.

[0089] Table 4 Group Collagen residue rate (%) Increase in fracture work (%) Decreased combing power (%) Hair care example 1 86 36 46 Hair care example 2 91 43 53 Hair care example 3 89 46 56 Hair care example 4 83 49 59 Hair care example 5 76 51 61 Hair care example 6 71 53 63 Hair care comparison ratio 1 58 21 26 Hair care comparison ratio 2 42 35 38 Hair care comparison ratio 3 62 24 30 Hair care ratio 4 48 40 43 Hair care ratio 5 87 44 54 Hair care ratio 6 88 45 55 Hair care ratio 7 55 30 32 Hair care ratio 8 35 28 40 The above is a further detailed description of the present invention and should not be considered as a limitation on the specific implementation of the present invention. For those skilled in the art, simple deductions or substitutions without departing from the concept of the present invention are all within the protection scope of the present invention.

Claims

1. A skin- or hair-care aqueous composition, characterized in that, The aqueous composition comprises aqueous polyurethane-10 and type III collagen; The weight ratio of the aqueous polyurethane-10 to type III collagen is 5000:1 to 1:10; and the total weight of the aqueous polyurethane-10 and type III collagen is less than 19.8% of the total weight of the composition.

2. The aqueous composition of claim 1, wherein, The weight ratio of the aqueous polyurethane-10 to type III collagen is 1000:1 to 1:

5.

3. The aqueous composition of claim 2, wherein, The weight ratio of the aqueous polyurethane-10 to type III collagen is 500:1 to 1:

2.

4. The aqueous composition according to claim 1, characterized in that, The waterborne polyurethane-10 is an aliphatic polyurethane-10 dispersion with a weight-average molecular weight of 50,000 to 200,000 and a solid content of 20-40%.

5. The aqueous composition according to claim 1, characterized in that, The type III collagen is recombinant humanized type III collagen with a molecular weight of 30,000 to 300,000 and a purity of ≥95%.

6. The aqueous composition according to claim 1, characterized in that, The aqueous composition further includes excipients, which include one or more of water, polyols, humectants, thickeners, and preservatives.

7. The aqueous composition according to claim 6, characterized in that, The polyol is selected from one or more of glycerin, butylene glycol, propylene glycol, and 1,2-hexanediol; the humectant is selected from one or more of sodium hyaluronate, trehalose, and betaine; and the thickener is selected from one or more of carbomer, xanthan gum, and hydroxyethyl cellulose.

8. The aqueous composition according to claim 1 or 3, characterized in that, The aqueous composition comprises 3% by weight of aqueous polyurethane-10 and 0.1% by weight of type III collagen.

9. The use of the aqueous composition according to claim 1 in the preparation of skin care products, characterized in that, The skin care products include gels, jelly, face mask liquid, serum, lotion, and cream.

10. The use of the aqueous composition of claim 1 in the preparation of hair care products, characterized in that, The hair care products include conditioner, hair mask, leave-in serum, and spray.