Skin / hair compound with long-term moisturizing, soothing and repairing effects and application of skin / hair compound

Abstract

The invention discloses a skin / hair compound with long-term moisturizing, soothing and repairing effects and application of the skin / hair compound, and belongs to the technical field of personal care products. The compound disclosed by the invention is prepared from beta-glucan, polyhydric alcohol and a centella asiatica extract. Compared with the prior art, the compound provided by the invention can be suitable for hair and skin products at the same time, and is especially suitable for wash-off products. Through the synergistic effect of all the components, the hair conditioner not only has the effects of keeping hair moist for a long time, keeping hair cuticles closed and improving mechanical properties, but also has the effects of moisturizing, soothing and repairing scalp and skin in real time for a long time, and can relieve discomfort caused by irritants in real time.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and in particular relates to a skin / hair composite with long-lasting moisturizing, soothing and repairing effects and an application thereof. Background Art

[0002] Water is an important basis for maintaining the stability of the human body environment and is essential for maintaining health. Long-term lack of water in the skin will increase the distance between cells, reduce cell activity, and cause collagen loss, resulting in wrinkles, sagging, and keratin hyperplasia. Moisturizers can maintain the moisture of the skin's stratum corneum, maintain skin elasticity, and promote the repair of skin barrier function. At the same time, with the increase in factors that induce sensitive muscles such as environmental pollution, accelerated pace of life, improper diet, and rising work pressure, cosmetic compositions with moisturizing and soothing effects have gradually attracted people's attention. It should be pointed out that although there are some compositions with moisturizing and soothing effects at present, there are still some shortcomings. For example, most compositions are highly targeted and have good effects on hair or skin, but there are relatively few compositions that can be applied to hair care and skin care at the same time. In addition, most compositions are easily washed during use, and it is difficult to achieve long-term moisturizing and immediate soothing effects, thereby limiting their application in wash-off products. Therefore, the development of a composition that has both long-term moisturizing and soothing effects and can be applied to wash-off hair / skin at the same time has good research significance and broad market prospects.

[0003] Patent CN202410244377.5 discloses a soothing, moisturizing and repairing composition with Artemisia annua extract, Centella asiatica extract and Gentiana yunnanensis extract as main ingredients. Although the composition has good moisturizing and soothing effects, the moisturizing time is short and it can only be used in skin cosmetics, and cannot moisturize the hair.

[0004] Patent CN202111649120.0 provides a moisturizing, firming and soothing skin care composition. The raw materials of the moisturizing, firming and soothing skin care composition include polyols, dextran derivatives, urea derivatives, witch hazel shrub plant extracts, and filtrate of beneficial bacteria fermentation products. The composition cannot form a film well on the surface of hair or skin to keep the hair scales closed to lock in moisture, and is easily washed away, and has no long-term moisturizing and soothing effects.

[0005] β-glucan is an important bioactive polysaccharide with the advantages of wide source, no irritation, renewable and safe. It exists in various forms due to different molecular weight and branching degree. The inventors of the present invention have found that high molecular weight β-glucan has high viscosity, good thermal stability, poor water solubility and strong water holding capacity, can be well adsorbed on hair and skin and is not easily washed away by water. Therefore, high molecular weight β-glucan has a moisturizing effect of long-lasting water lock. In addition to β-glucan, polyols generally also have a good moisturizing effect. Its rich hydrophilic groups not only enable polyols to absorb moisture from the environment and replenish it into hair or skin, but also give the composition good water solubility. However, small molecule polyols cannot form a film on the surface of skin or hair, are easily washed away by water, and cannot achieve a long-term moisturizing effect. If high molecular weight β-glucan is compounded with small molecule polyols, the polyols can be well retained by high molecular weight β-glucan, achieving a synergistic moisturizing effect. At the same time, the overall viscosity is reduced, the water solubility is improved, and the skin feel is improved.

[0006] It should be pointed out that although the above composition can achieve a long-term moisturizing effect and is suitable for hair / skin products, it has no obvious soothing effect. With the increase in consumer demand for diversified efficacy, on the basis of the above composition, the inventors of the present invention compound suitable soothing raw materials to obtain a composition with a long-term moisturizing and soothing effect. Centella asiatica extract, as a natural plant extract, is not only green and safe, but also has the effects of instant soothing, strengthening the skin barrier and deeply moisturizing the skin. It is an ideal ingredient for developing soothing, anti-aging and restorative skin care products. In summary, the present invention proposes to compound high molecular weight β-glucan, low molecular weight polyols (such as pentylene glycol, caprylyl glycol, menthol, glycerin) and Centella asiatica extract into a cosmetic complex for personal care products. It has been verified experimentally that the synergistic effect between the components of the complex makes it have a long-term moisturizing, soothing and repairing effect, and it has strong versatility and is suitable for skin and hair products, especially for wash-off products. Summary of the invention

[0007] Based on the deficiencies of the prior art, the present invention provides a skin / hair complex with long-lasting moisturizing, soothing and repairing effects and its application, which can solve the problems of moisturizing and soothing products on the market that the moisturizing effect is not long-lasting, the soothing effect is poor, they are easily washed away by water, and they cannot be used in wash-off hair / skin products at the same time.

[0008] The technical solution of the present invention:

[0009] A skin / hair composite with long-lasting moisturizing, soothing and repairing effects, comprising, by mass percentage, 10-40% of beta-glucan, 40-80% of polyol and 5-20% of Centella asiatica extract.

[0010] In a preferred embodiment, the molecular weight of the β-glucan in the complex is greater than 4 million Daltons.

[0011] In a preferred embodiment, the polyol in the complex is one or a mixture of two or more of butylene glycol, pentylene glycol, octanediol, menthol, glycerol, propylene glycol, sorbitol and xylitol.

[0012] In a preferred embodiment, the Centella asiatica extract in the composite is asiatica glycoside or madecassoside.

[0013] On the one hand, the skin / hair complex provided by the present invention has long-lasting moisturizing, soothing and repairing effects and is applied to hair products, which can keep the hair moisturized for a long time, keep the hair scales closed for a long time, improve the mechanical properties of the hair and soothe the scalp.

[0014] Furthermore, when the complex is used in hair products, it preferably comprises: 10-30% of β-glucan, 50-80% of polyol, and 10-20% of Centella asiatica extract.

[0015] Furthermore, when the complex is used in hair products, the polyol is preferably one or a mixture of two or more of pentylene glycol, caprylyl glycol, menthol and glycerin.

[0016] Furthermore, when the complex is used in hair products, the Centella asiatica extract is preferably madecassoside.

[0017] On the other hand, the skin / hair complex provided by the present invention has long-term moisturizing, soothing and repairing effects and is used in skin products to play a role in long-term moisturizing, locking in moisture and soothing and repairing the skin.

[0018] Furthermore, when the complex is used in skin products, it preferably comprises: 20-40% β-glucan, 40-70% polyol, and 5-20% Centella asiatica extract.

[0019] Furthermore, when the complex is used in skin products, the polyol is preferably one or a mixture of two or more of pentylene glycol, caprylyl glycol, menthol, glycerol, butylene glycol, and propylene glycol.

[0020] Furthermore, when the complex is used in skin products, the Centella asiatica extract is preferably madecassoside.

[0021] A method for preparing a skin / hair composite with long-lasting moisturizing, soothing and repairing effects, comprising the following steps:

[0022] β-glucan, polyol and Centella asiatica extract are weighed in proportion and mixed, and the mixture is heated in a 75-85° C. water bath until all components are mixed and dissolved to obtain a complex.

[0023] The skin / hair complex with long-term moisturizing, soothing and repairing effects provided by the present invention can be applied to skin / hair products.

[0024] As a preferred embodiment of the skin / hair complex with long-lasting moisturizing, soothing and repairing effects described in the present invention, the addition amount of the complex in the hair product should be 0.1% to 8% (by mass percentage). After the complex is mixed with other components, it is placed in a 75-85°C water bath and heated until all components are mixed and dissolved to obtain a hair product.

[0025] As a preferred embodiment of the skin / hair complex with long-lasting moisturizing, soothing and repairing effects described in the present invention, the addition amount of the complex in the skin product should be 0.3% to 15% (by mass percentage). After the complex is blended with other components, it is placed in a 75-85°C water bath and heated until all components are mixed and dissolved to obtain a skin product.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] (1) The complex provided by the present invention comprises β-glucan, polyol and Centella asiatica extract. In the complex, the molecular weight of β-glucan is above 4 million Daltons, and β-glucan will adhere to the surface of skin and hair to play a role of long-term water lock; polyol will absorb moisture from the environment, and the two will cooperate with each other to resist water washing and achieve long-term moisturizing of hair and skin.

[0028] (2) The β-glucan in the complex provided by the present invention can interact with soothing ingredients such as menthol and Centella asiatica extract, so that they adhere to the surface of the skin and scalp and are not easily washed away, thereby achieving a long-lasting soothing and repairing effect.

[0029] (3) The composite provided by the present invention has good biocompatibility, low raw material cost, simple preparation process, no irritation, and is applicable to a wide range of people.

[0030] (4) The composite provided by the present invention has a wide range of applications, a small amount of use, and significant efficacy, and can be used in rinse-off hair / skin products. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0032] Figure 1 The thermal weight loss pictures of hair after using comparative examples 1, 2, 3, 4 and application example 1 of the present invention are shown.

[0033] Figure 2 The thermal weight loss pictures of hair after using Examples 1, 2 and 3 of the present invention are shown.

[0034] Figure 3 The following is a SEM picture of hair scale adsorption after using the simple shampoo of the present invention and Application Example 1.

[0035] Figure 4 These are SEM pictures of hair scale adsorption after using Comparative Examples 1, 2, 3 and Application Example 1 of the present invention.

[0036] Figure 5 The longitudinal microscopic pictures of hair after using Application Example 1 and Comparative Example 4 are shown.

[0037] Figure 6 These are infrared spectroscopic images of the hair used in the present invention, Application Example 1, and the hair after using Application Example 1.

[0038] Figure 7 These are blood perfusion pictures before and after using Example 6 of the present invention.

[0039] Figure 8 The pictures of facial red areas are shown before and after 2 weeks of use of Example 6 of the present invention. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with specific embodiments.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0043] The present invention is applied to the hair and scalp tests as follows:

[0044] Example 1

[0045] Based on the total mass of the hair product being 100%, 0.75% of β-glucan (molecular weight of about 5 million Daltons), 0.60% of octanediol, 0.60% of pentylene glycol, 0.60% of menthol, and 0.45% of madecassoside are weighed in proportion and mixed; the mixture is placed in a water bath at 80° C. and heated for 10 minutes until all components are mixed and dissolved, thereby obtaining a complex. 97.00% of water is added to the complex, and after blending, the mixture is placed in a water bath at 80° C. and heated until all components are mixed and dissolved, thereby obtaining a hair product.

[0046] Example 2

[0047] Based on the total mass of the hair product being 100%, 0.50% of β-glucan (molecular weight of about 5 million Daltons), 0.40% of octanediol, 0.40% of pentylene glycol, 0.40% of menthol, and 0.30% of madecassoside are weighed in proportion and mixed; the mixture is placed in a water bath at 80° C. and heated for 10 minutes until all components are mixed and dissolved, thereby obtaining a complex. 98.00% of water is added to the complex, and after blending, the mixture is placed in a water bath at 80° C. and heated until all components are mixed and dissolved, thereby obtaining a hair product.

[0048] Example 3

[0049] Based on the total mass of the hair product being 100%, 0.25% of β-glucan (molecular weight of about 5 million Daltons), 0.20% of octanediol, 0.20% of pentylene glycol, 0.20% of menthol, and 0.15% of madecassoside are weighed in proportion and mixed; heated in a water bath at 80°C for 10 minutes until all components are mixed and dissolved, thereby obtaining a complex. 99.00% of water is added to the complex, and after blending, heated in a water bath at 80°C until all components are mixed and dissolved, thereby obtaining a hair product.

[0050] Example 4

[0051] Based on the total mass of the hair product being 100%, 0.30% of β-glucan (molecular weight of about 5 million Daltons), 0.80% of octanediol, 0.80% of pentylene glycol, 0.80% of menthol, and 0.30% of madecassoside are weighed in proportion and mixed; the mixture is placed in a water bath at 80° C. and heated for 10 minutes until all components are mixed and dissolved, thereby obtaining a complex. 97.00% of water is added to the complex, and after blending, the mixture is placed in a water bath at 80° C. and heated until all components are mixed and dissolved, thereby obtaining a hair product.

[0052] Example 5

[0053] Based on the total mass of the hair product being 100%, 0.90% of β-glucan (molecular weight of about 5 million Daltons), 0.50% of octanediol, 0.50% of pentylene glycol, 0.50% of menthol, and 0.60% of madecassoside are weighed in proportion and mixed; the mixture is placed in a water bath at 80° C. and heated for 10 minutes until all components are mixed and dissolved, thereby obtaining a complex. 97.00% of water is added to the complex, and after blending, the mixture is placed in a water bath at 80° C. and heated until all components are mixed and dissolved, thereby obtaining a hair product.

[0054] Application Example 1-5: The water in Example 1-5 is replaced with a simple shampoo of the same quality.

[0055] The simple shampoo formula used in the present invention is as follows:

[0056]

[0057]

[0058] Application Comparative Example 1

[0059] Different from Application Example 1, only 0.75% of β-glucan (molecular weight of about 5 million Daltons) is added to the complex in the shampoo, and the other two components in the complex are replaced by water.

[0060] Application Comparative Example 2

[0061] Different from Application Example 1, only 0.45% of madecassoside is added to the complex in the shampoo, and the other two components in the complex are replaced by water.

[0062] Application Comparative Example 3

[0063] Different from Application Example 1, the complex added to the shampoo only contains 0.60% of caprylyl glycol, 0.60% of pentylene glycol and 0.60% of menthol, and the other two components in the complex are replaced by water.

[0064] Application Comparative Example 4

[0065] Different from Application Example 1, the β-glucan in the complex added to the shampoo is changed to low molecular weight β-glucan (about 50,000 Daltons).

[0066] Hair moisturizing test:

[0067] Test method: Wet a certain amount of hair with (37.0±1.0)℃ water, apply a specified amount of product on the hair, and squeeze and wash along the direction of the hair to the end to ensure that it is not messy and can be evenly sampled for 1 minute, then rinse with (37.0±1.0)℃, 4L / min water flow for 30s, and squeeze the water on the hair from top to bottom every 5s. Then cut the prepared hair into pieces, weigh 8-10mg of hair in a crucible, heat it up and record the weight of the hair. (Temperature range: 50-200℃, heating rate: 15℃ / min, nitrogen flow rate: 50mL / min).

[0068] like Figure 1 As shown, the hair thermal weight loss data of Application Example 1 is better than that of Comparative Examples 1-4; Figure 2 As shown, the complex has good moisturizing ability at low concentration, and as the concentration of the complex increases, the moisturizing ability increases accordingly. Figure 1 and Figure 2 This indicates that the complex has a good moisturizing effect on hair.

[0069] like Figure 3 As shown, adding the complex to a simple shampoo can slow down the erosion of the shampoo on the hair; Figure 4 As shown, in Application Example 1, the hair scales are more tightly and smoothly attached; Figure 5 As shown in Figure 2, more shiny substances can be observed on the hair cross section after adding high molecular weight complexes, indicating that high molecular weight complexes are not easily washed away by water; Figure 6 As shown, the characteristic peak of the pyranose ring of β-glucan was detected in the infrared spectrum of the hair after washing. Figure 3 to Figure 6 Together, this indicates that the complex remains on the hair after washing.

[0070] Mechanical properties test:

[0071] Test method: Wet a certain amount of hair with (37.0±1.0)℃ water, apply a specified amount of product on the hair, squeeze and wash the hair towards the end to ensure that it is not messy and can be evenly sampled for 1 minute, then rinse with (37.0±1.0)℃, 4L / min water for 30 seconds, clamp the water on the hair from top to bottom every 5 seconds, and let it dry naturally. Then use an SN-1200W high-definition camera to measure the diameter of the hair. The specific method is to take the average of the diameters at 3 positions in the middle section. Then take 20 hairs with a diameter difference of 10μm in the hair bundle and use a fiber strength tester to perform a single fiber strength test. The tensile strength of the control group (only using simple shampoo) and each sample group is calculated and compared using the following formula:

[0072] σ=F b / S0

[0073] Where σ is the tensile strength, F b is the maximum force that the sample withstands when it is broken, and S0 is the original cross-sectional area of ​​the sample.

[0074] In addition, the elastic modulus of the hair of the control group (using only simple shampoo) and each sample group can be calculated and compared by the Hookean segment curve and the following formula:

[0075] E=FL / SdL

[0076] In the formula, F is the breaking strength, S is the cross-sectional area of ​​the hair, dL is the elongation of the hair, and L is the length of the hair being tested.

[0077] Table 1: Mechanical properties test results

[0078]

[0079] From the test results, the tensile strength and elastic modulus of Application Examples 1, 4, and 5 are higher than those of Comparative Examples 1-4, indicating that adding the composite to shampoo can improve the mechanical properties of hair and increase the flexibility and rigidity of hair.

[0080] Hair Soothing Test:

[0081] Test environment: temperature is 22-23℃, relative humidity is 45%-55%.

[0082] Test method: 30 volunteers were selected for a scalp soothing test for 3 weeks, and the volunteers' scores on the degree of scalp soothing were recorded every week. The scoring standard is 0 points - no soothing effect, 1 point - general soothing effect, 2 points - moderate soothing effect, 3 points - good soothing effect, 4 points - excellent soothing effect.

[0083] Table 2: Average results of scalp soothing score

[0084]

[0085]

[0086] From the results, the soothing effect of application examples 1-3 on the scalp is better than that of application comparative examples 1-3, and the order from best to worst is application example 1, application example 2, and application example 3, indicating that adding the complex to shampoo can give the shampoo a better soothing effect. In addition, as the total concentration of the complex increases, the soothing effect of the complex on the scalp increases accordingly.

[0087] Conclusion: β-Glucan, polyols and madecassoside have synergistic effects, and with the increase of the concentration of the complex, the moisturizing performance of the hair is better, the mechanical properties are improved, and the scalp soothing effect is more obvious.

[0088] The present invention is applied to skin tests as follows:

[0089] Example 6

[0090] Based on the total mass of the skin product being 100%, 1.20% of β-glucan (molecular weight of about 5 million Daltons), 0.80% of pentanediol, 0.80% of octanediol, 0.80% of menthol, and 0.40% of madecassoside were weighed in proportion and mixed; heated in a water bath at 80°C for 10 minutes until all components were mixed and dissolved to obtain a complex. 96.00% of water was added to the complex, and after blending, heated in a water bath at 80°C until all components were mixed and dissolved to obtain a skin product.

[0091] Example 7

[0092] Based on the total mass of the skin product being 100%, 1.20% of β-glucan (molecular weight of about 5 million Daltons), 0.80% of pentylene glycol, 0.80% of glycerol, 0.80% of menthol, and 0.40% of madecassoside were weighed in proportion and mixed; the mixture was placed in a water bath at 80°C and heated for 10 minutes until all components were mixed and dissolved to obtain a complex. 96.00% of water was added to the complex, and after blending, the mixture was placed in a water bath at 80°C and heated until all components were mixed and dissolved to obtain a skin product.

[0093] Example 8

[0094] Based on the total mass of the skin product being 100%, 1.20% of β-glucan (molecular weight of about 5 million Daltons), 0.80% of caprylyl glycol, 0.80% of glycerol, 0.80% of menthol, and 0.40% of madecassoside were weighed in proportion and mixed; the mixture was placed in a water bath at 80°C and heated for 10 minutes until all components were mixed and dissolved to obtain a complex. 96.00% of water was added to the complex, and after blending, the mixture was placed in a water bath at 80°C and heated until all components were mixed and dissolved to obtain a skin product.

[0095] Example 9

[0096] Based on the total mass of the skin product being 100%, 1.20% of β-glucan (molecular weight of about 5 million Daltons), 0.80% of octanediol, 0.80% of pentylene glycol, 0.80% of glycerol, and 0.40% of madecassoside were weighed in proportion and mixed; heated in a water bath at 80°C for 10 minutes until all components were mixed and dissolved to obtain a complex. 96.00% of water was added to the complex, and after blending, heated in a water bath at 80°C until all components were mixed and dissolved to obtain a skin product.

[0097] Example 10

[0098] Based on the total mass of the skin product being 100%, 1.20% of β-glucan (molecular weight of about 5 million Daltons), 0.80% of pentanediol, 0.80% of octanediol, 0.80% of menthol, and 0.40% of asiatica glycoside were weighed in proportion and mixed; the mixture was placed in a water bath at 80°C and heated for 10 minutes until all components were mixed and dissolved to obtain a complex. 96.00% of water was added to the complex, and after blending, the mixture was placed in a water bath at 80°C and heated until all components were mixed and dissolved to obtain a skin product.

[0099] Embodiment 11

[0100] Based on the total mass of the skin product being 100%, 0.80% of β-glucan (molecular weight of about 5 million Daltons), 0.90% of pentanediol, 0.90% of octanediol, 1.00% of menthol, and 0.40% of madecassoside were weighed in proportion and mixed; heated in a water bath at 80°C for 10 minutes until all components were mixed and dissolved to obtain a complex. 96.00% of water was added to the complex, and after blending, heated in a water bath at 80°C until all components were mixed and dissolved to obtain a skin product.

[0101] Example 12

[0102] Based on the total mass of the skin product being 100%, 1.60% of β-glucan (molecular weight of about 5 million Daltons), 0.60% of pentanediol, 0.60% of octanediol, 0.60% of menthol, and 0.60% of madecassoside were weighed in proportion and mixed; heated in a water bath at 80°C for 10 minutes until all components were mixed and dissolved to obtain a complex. 96.00% of water was added to the complex, and after blending, heated in a water bath at 80°C until all components were mixed and dissolved to obtain a skin product.

[0103] Embodiment 13

[0104] Based on the total mass of the skin product being 100%, 1.60% of β-glucan (molecular weight of about 5 million Daltons), 0.70% of pentanediol, 0.70% of octanediol, 0.80% of menthol, and 0.20% of madecassoside were weighed in proportion and mixed; the mixture was placed in a water bath at 80°C and heated for 10 minutes until all components were mixed and dissolved to obtain a complex. 96.00% of water was added to the complex, and after blending, the mixture was placed in a water bath at 80°C and heated until all components were mixed and dissolved to obtain a skin product.

[0105] Comparative Example 1

[0106] Based on the total mass of the skin product being 100%, 1.20% of β-glucan (molecular weight of about 5 million Daltons) was weighed out in proportion and heated in a water bath at 80°C for 10 min. 98.80% of water was added, and the mixture was mixed and heated in a water bath at 80°C until all components were mixed and dissolved to obtain a skin product.

[0107] Comparative Example 2

[0108] Based on the total mass of the skin product being 100%, 0.80% of pentylene glycol, 0.80% of caprylyl glycol, and 0.80% of menthol are weighed in proportion, and the mixture is heated in a water bath at 80°C for 10 min. 97.60% of water is added, the mixture is mixed, and the mixture is heated in a water bath at 80°C until all components are mixed and dissolved to obtain a skin product.

[0109] Comparative Example 3

[0110] Based on the total mass of the skin product being 100%, 0.40% of madecassoside was weighed in proportion, and the mixture was heated in a water bath at 80°C for 10 min. 99.60% of water was added, and the mixture was mixed and heated in a water bath at 80°C until all components were mixed and dissolved to obtain a skin product.

[0111] Table 3: Amount of the composite (by mass fraction) and comparison method

[0112]

[0113]

[0114] Skin moisturizing test:

[0115] Test environment: temperature is 22-23℃, relative humidity is 45%-55%.

[0116] Test method: 30 volunteers with sensitive skin were selected for the test, aged 25±1.5 years old. The subjects used a multifunctional skin tester (CK, Germany) to perform skin moisture test and transepidermal water loss (TEWL) test before and 6 hours after using the product. The specific process is: the volunteers first washed their arms and hands, and after drying, drew 3 1cm×1cm square boxes on the inner side of the left and right arms as the measurement area, with a 1cm interval between each box. After sitting in a constant temperature and humidity chamber for 30 minutes, the skin moisture content and transepidermal water loss of the corresponding area were measured, and it was used as the basic value; then 6 drops of test sample were dropped in each area, and after a period of time, the skin moisture content and transepidermal water loss of each area were measured using the same test method, and recorded as the experimental value (the subjects could not leave the constant temperature and humidity chamber during the entire test process). The rate of change of skin moisture and transepidermal water loss is expressed as (experimental value-basic value) / basic value.

[0117] Skin soothing and repairing test

[0118] Test environment: temperature is 22-23℃, relative humidity is 45%-55%.

[0119] Test method: The subject washes the inside of both arms, dries them and draws a 2cm×2cm square on the inside of the left and right arms respectively. Sit quietly in a constant temperature and humidity chamber for 30 minutes. Soak a test paper with a radius of 1cm in a 3% mass fraction of capsaicin solution. After a period of time, take out the test paper and stick it in the box. After 15 minutes, remove the test paper and measure the blood perfusion of the test area, which is recorded as A. Then immediately apply the sample and measure the blood perfusion (PU) 30s after applying the sample, which is recorded as B. The size of the (BA) / A value can reflect the strength of the immediate soothing ability. The smaller the value, the better the soothing and repairing effect of the complex.

[0120] Table 4: Skin moisturizing and soothing repair test results

[0121]

[0122] Typical photos of the changes in blood flow of volunteers before and after using Example 6 of the present invention after capsaicin stimulation are shown in Figure 7 The results showed that after the volunteers used Example 6, the hemoglobin content in the blood was significantly reduced, and the blood perfusion (PU) was reduced.

[0123] Conclusion: From the test results, Examples 6 to 10 increased the skin moisture content by more than 13% and reduced the transepidermal water loss rate by more than 10%. In addition, the blood perfusion of the stimulated skin was reduced by more than 20%, indicating that the complex has good long-term moisturizing and soothing capabilities; when the polyols are pentylene glycol, caprylyl glycol and menthol, the complex has the best effect and the compounding effect is the best.

[0124] Instant relief test

[0125] Test environment: temperature is 22-23℃, relative humidity is 45%-55%.

[0126] Test method: 30 volunteers with sensitive skin were selected for the test. They sat in a constant temperature and humidity room for about 30 minutes, and then cleaned the nasal groove area on both sides of the face with clean water. First, a lactic acid solution with a mass fraction of 10% was applied to the lateral nasal groove area. After the lactic acid stinging sensation was felt, the volunteers scored the degree of abnormality (including stinging, itching and burning) according to their actual feelings; then the test sample was applied, and the degree of abnormality was scored at 30s, 150s and 300s respectively. It is stipulated that no abnormal feeling is recorded as 0 points, slight abnormal feeling is recorded as 1 point, moderate abnormal feeling is recorded as 2 points, and severe abnormal feeling is recorded as 3 points.

[0127] Table 5: Facial abnormality scoring results

[0128] Test products Abnormal rating 30s 150s 300s Example 6 2.67 0.36 0.22 0.23 Example 7 2.45 0.86 0.98 0.77 Example 8 2.66 0.79 0.82 0.83 Example 9 2.78 1.12 0.89 0.92 Example 10 2.75 0.44 0.38 0.40 Comparative Example 1 2.80 2.56 2.47 2.2 Comparative Example 2 2.68 2.55 2.47 2.32 Comparative Example 3 2.68 2.32 2.28 2.20

[0129] From the results, the test product showed significant improvement in the strange feeling caused by lactic acid stimulation at 30s, 150s and 300s after use, indicating that the complex has good immediate soothing effect.

[0130] Inflammation relief test:

[0131] Test environment: temperature is 22-23℃, relative humidity is 45%-55%.

[0132] Test method: 30 volunteers were selected for the test. They washed their faces with clean water and dried them, then sat in a constant temperature and humidity chamber for 30 minutes. After the face stabilized, the VISIA skin tester (Canfield, USA) was used to measure the facial red area and recorded it. The same method was used to measure the facial red area 1 week and 2 weeks after using the sample. The anti-inflammatory ability can be compared based on the rate of change of the red area.

[0133] Table 6: Red zone area change rate

[0134] Test products Change rate after 1 week Change rate after 2 weeks Example 6 -4.2％ -10.0％ Example 7 -3.3％ -6.4％ Example 8 -3.8％ -6.7％ Example 9 -3.0％ -6.6％ Example 10 -3.7％ -8.4％ Embodiment 11 -2.7％ -6.8％ Example 12 -2.3％ -5.4％ Embodiment 13 -1.7％ -3.4％ Comparative Example 1 -0.6％ -0.7％ Comparative Example 2 -0.8％ -0.8％ Comparative Example 3 -1.2％ -2.6％

[0135] The facial red area pictures of volunteers before and two weeks after using Example 6 are shown in Figure 8 The results showed that after the volunteers used Example 6 for two weeks, the red areas on their faces were significantly improved, indicating that the complex had a good anti-inflammatory effect.

[0136] According to the test results, the area of ​​facial red areas was reduced after 1 and 2 weeks of use, indicating that the complex has certain anti-inflammatory ability.

[0137] In summary, the present invention provides a complex with long-term moisturizing, soothing and repairing effects, which includes three major components: β-glucan, Centella asiatica extract and polyols. They work synergistically with each other to form a thin film on the hair and skin to prevent the evaporation of moisture and achieve a long-term moisturizing effect; in addition, the complex can also reduce skin inflammation, repair the skin barrier, and soothe the skin and scalp.

[0138] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that any modification, replacement and improvement of the technical solutions of the present invention should be included in the scope of the claims of the present invention without departing from the spirit and principles of the technical solutions of the present invention.

Claims

1. A skin / hair composite with long-lasting moisturizing, soothing and repairing effects, characterized in that: The composite comprises, by mass percentage, 10-40% beta-glucan, 40-80% polyol and 5-20% centella asiatica extract; the molecular weight of the beta-glucan in the composite is above 4 million daltons.

2. A skin / hair composite with long-lasting moisturizing, soothing and repairing effects according to claim 1, characterized in that: The polyol in the compound is one or a mixture of two or more of butylene glycol, pentylene glycol, octanediol, menthol, glycerol, propylene glycol, sorbitol and xylitol.

3. The skin / hair composite with long-lasting moisturizing, soothing and repairing effects according to claim 1, characterized in that: The Centella asiatica extract in the complex is asiatica glycoside or madecassoside.

4. A method for preparing a skin / hair composite having long-lasting moisturizing, soothing and repairing effects as claimed in any one of claims 1 to 3, characterized in that: The steps are as follows: weigh β-glucan, polyol and Centella asiatica extract according to proportion and mix them; place the mixture in a 75-85° C. water bath and heat until all components are mixed and dissolved to obtain a complex.

5. Use of a skin / hair composite with long-term moisturizing, soothing and repairing effects as claimed in any one of claims 1 to 3, or a skin / hair composite with long-term moisturizing, soothing and repairing effects obtained by the preparation method of claim 4, characterized in that: Used in hair products or skin products.

6. The use according to claim 5, characterized in that: When the complex is used in hair products, the complex comprises: 10-30% beta-glucan, 50-80% polyol, and 10-20% Centella asiatica extract; the polyol is one or a mixture of two or more of pentylene glycol, octanediol, menthol, and glycerol; and the Centella asiatica extract is madecassoside.

7. The use according to claim 5, characterized in that: When the complex is used in skin products, the complex includes: 20-40% beta-glucan, 40-70% polyol, and 5-20% Centella asiatica extract; the polyol is one or a mixture of two or more of pentylene glycol, caprylyl glycol, menthol, glycerol, butylene glycol, and propylene glycol; and the Centella asiatica extract is madecassoside.

8. The use according to claim 5, characterized in that: The mass percentage of the composite in the hair product is 0.1% to 8%.

9. The use according to claim 5, characterized in that: The mass percentage of the complex in the skin product is 0.3% to 15%.

10. The use according to claim 8 or 9, characterized in that: Applicable to rinse-off products and leave-on products, the complex is mixed with other components in a hair product or skin product and then heated in a 75-85°C water bath until all components are mixed and dissolved to obtain a hair product or skin product.

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