A natural vegetable oil composition, its preparation method and use

Abstract

The application discloses a natural plant oil composition and a preparation method and application thereof, and belongs to the field of cosmetics. The natural plant oil composition comprises sunflower seed oil, jojoba seed oil, grape seed oil and camellia seed oil. The mass ratio of the sunflower seed oil, the jojoba seed oil, the grape seed oil and the camellia seed oil is 1:0.5-1.5:0.5-1.5:0.5-1.5. The components are mixed uniformly during preparation. Practice shows that the combination of the four natural plant oils has excellent moisturizing effect and skin repair effect. Compared with the single or partial combination of the four natural plant oils, the combination has a more optimal and balanced effect. In particular, the moisturizing and skin repair effect can be significantly improved with a small amount of the natural plant oil composition, and the natural plant oil composition is beneficial to be added and used in cosmetics, does not need to be additionally emulsified and dispersed by using too much emulsifier, is beneficial to reduce the irritation caused by the emulsifier, and has a good use experience.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products, specifically to a natural plant oil composition, its preparation method, and its application. Background Technology

[0002] Modern people are exposed to excessive stress, irregular diets, and the external environment caused by inhaled particulate matter, leading to various skin problems such as acne, accelerated aging, and dehydration. These problems are all caused by insufficient skin moisture, which damages the skin's protective barrier. Therefore, solutions to these problems include hydration and repair, and cosmetics are one means of hydration and repair. In the early stages of the development of cosmetics, natural products (plant and animal resources, minerals, etc.) were used. With the advancement of science, it was discovered that synthetic chemical products were easier to obtain and potentially cheaper than natural products, while also achieving certain skin care effects in many aspects. Thus, natural cosmetics were abandoned in favor of chemical products. However, since the use of chemical products, the toxicity, irritation, and allergic reactions of chemical drugs have gradually emerged. Their long-term effectiveness and safety have raised concerns. In addition, environmental protection issues caused by industrial production have followed. Therefore, in pursuit of natural, non-toxic, and pollution-free products, while striving to reduce or eliminate the side effects of chemical products, people are also paying more attention to natural plant-based raw materials with fewer side effects, higher safety, and multiple physiological benefits.

[0003] Currently, with stringent requirements for cosmetics, new cosmetic products wishing to continue claiming moisturizing effects must have moisturizing ingredients added to their formula at levels confirmed in publicly available literature. Otherwise, moisturizing efficacy testing is required, which undoubtedly increases product development costs in terms of both expense and time. Commonly used moisturizers in cosmetics include polyol moisturizers, amide moisturizers, lactic acid and sodium lactate, sodium pyrrolidone carboxylate, glucose ester moisturizers, collagen (protein) moisturizers, chitin derivatives, and deacetylated chitosan moisturizers. Currently, polyol moisturizers such as glycerin and butylene glycol are most commonly used in cosmetics, firstly because these raw materials are inexpensive, and secondly because their moisturizing efficacy has been proven in publicly available literature, eliminating the need for retesting the moisturizing efficacy of the product. However, while some naturally derived oils have been found to have certain moisturizing effects in experiments, there is limited data on their efficacy in publicly available literature. Specific efficacy data for many ingredients is unavailable. Furthermore, according to current literature and research data, the amount of single oil-based ingredients used as moisturizers in cosmetics to achieve moisturizing effects is higher than that of polyol moisturizers such as glycerin and butylene glycol. For formulas with low oil content, adding oil-based moisturizers is more difficult, making it challenging to achieve the desired efficacy levels while simultaneously ensuring stability and a pleasant user experience in actual formula development. Therefore, the use of naturally derived oils in cosmetics is currently somewhat limited. Summary of the Invention

[0004] The purpose of this invention is to overcome one or more shortcomings of the prior art and provide a new natural plant oil composition that can simultaneously achieve moisturizing and skin repair functions with a smaller amount of additive, thereby overcoming the problems existing in the prior art.

[0005] The present invention also provides an application of the above-described natural plant oil composition in cosmetics.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A natural plant oil composition comprising sunflower seed oil, jojoba seed oil, grape seed oil, and camellia seed oil; wherein the mass ratio of the sunflower seed oil, jojoba seed oil, grape seed oil, and camellia seed oil is 1:0.5-1.5:0.5-1.5:0.5-1.5.

[0008] In some embodiments of the present invention, the mass ratio of the sunflower seed oil, the jojoba seed oil, the grape seed oil and the camellia seed oil is 1:0.6-1.5:0.6-1.5:0.6-1.0.

[0009] In some embodiments of the present invention, the natural plant oil composition comprises 20%-30% sunflower seed oil, 20%-30% jojoba seed oil, 20%-30% grape seed oil, and 20%-30% camellia seed oil.

[0010] In some embodiments of the present invention, the method for preparing the sunflower seed oil includes:

[0011] Oil is extracted from sunflower seeds by pressing, then filtered to remove suspended solids and impurities to obtain crude oil. The crude oil is then removed by adding hot water and / or alkaline solution to remove hydrated phospholipids, and non-hydrated phospholipids are removed by citric acid. Finally, the crude oil is neutralized by alkaline solution.

[0012] Then heat to 80-85℃ and rinse with hot water to separate the oil and water. Repeat this process several times.

[0013] Finally, the sunflower seed oil is obtained through drying, bleaching, and deodorization.

[0014] Furthermore, in the process of preparing the sunflower seed oil, the hot water used to remove the hydrated phospholipids and the hot water used for rinsing are both 60-95°C water.

[0015] Furthermore, in the process of preparing the sunflower seed oil, the bleaching involves heating the dried crude oil to 90-95°C, and then adding bleaching clay at a weight of 1.0%-1.5% of the oil for bleaching.

[0016] Furthermore, in the process of preparing the sunflower seed oil, the deodorization is carried out at 230-240°C under vacuum conditions.

[0017] In some embodiments of the present invention, the method for preparing the jojoba seed oil includes:

[0018] Jojoba seeds are ground into powder and added to a tank. Then, liquefied carbon dioxide is introduced into the tank at isobaric pressure to immerse the jojoba seed powder in the tank. The mixture is then treated at 40-45°C and 6.9-7.2 MPa. The mixture is then filtered to separate the clear liquid, which is introduced into a vacuum tank and cooled to 10-15°C while the carbon dioxide liquid is recovered. The solidified waxy jojoba seed oil is then removed, heated to melt, and then cooled to room temperature to obtain the jojoba seed oil.

[0019] In some embodiments of the present invention, the method for preparing the grape seed oil includes:

[0020] Grape seed powder and hexane are mixed and then heated at 60-65℃ for extraction. After extraction, the hexane is evaporated to obtain crude oil. The hydrated phospholipids in the crude oil are then removed by adding hot water and / or alkaline solution to the crude oil. The non-hydrated phospholipids in the crude oil are then removed by citric acid. The oil is then neutralized with alkaline solution, heated to 80-85℃, and rinsed with hot water to separate the oil and water. This process is repeated several times.

[0021] The oil is then heated to 85-95℃, and activated carbon is added at 3%-5% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 60-75℃, the oil is pumped out to remove the activated carbon, and vacuum deodorization is performed to obtain the grape seed oil.

[0022] Furthermore, in the process of preparing the grape seed oil, the hot water used to remove the hydrated phospholipids and the hot water used for rinsing are both 60-95°C water.

[0023] Furthermore, in the process of preparing the grape seed oil, the mass ratio of grape seed powder to hexane is 15-25:1.

[0024] Furthermore, during the preparation of the grape seed oil, the vacuum deodorization is carried out at 170-180°C.

[0025] In some embodiments of the present invention, the method for preparing the camellia seed oil includes:

[0026] After pressing the shelled camellia seeds to extract the oil, the oil residue is removed by filtering to obtain crude oil.

[0027] The crude oil is then treated by adding hot water and / or alkaline solution to remove hydrated phospholipids, followed by the removal of non-hydrated phospholipids with citric acid, neutralization with alkaline solution, heating to 80-85°C, and rinsing with hot water to separate oil and water. This process is repeated multiple times.

[0028] The oil is then heated to 85-95℃, and activated carbon is added at 3%-5% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 60-75℃, the oil is pumped out to remove the activated carbon, and vacuum deodorization is performed to obtain the camellia seed oil.

[0029] Furthermore, in the process of preparing the camellia seed oil, the hot water used to remove the hydrated phospholipids and the hot water used for rinsing are both 60-95°C water.

[0030] Furthermore, in the process of preparing the camellia seed oil, the vacuum deodorization is carried out at 250-270°C.

[0031] Another technical solution provided by the present invention: a method for preparing the above-mentioned natural plant oil composition, the preparation method comprising: mixing the components evenly to form a composition.

[0032] Another technical solution provided by the present invention is the application of the above-described natural plant oil composition in the preparation of cosmetics with moisturizing and skin-repairing effects.

[0033] In some embodiments of the present invention, the raw materials of the cosmetic include component A, component B, component C, and component D;

[0034] Component A includes water and polyols;

[0035] Component B includes xanthan gum and ammonium acryloyldimethyl taurate / VP copolymer;

[0036] The C component includes C14-22 alcohol / C12-20 alkyl glucoside, cetearyl alcohol, behenyl alcohol, dioctyl carbonate / tocopherol, and dibutyl adipate;

[0037] Component D includes the natural plant oil composition described above.

[0038] Furthermore, the mass ratio of the xanthan gum to the ammonium acryloyldimethyl taurate / VP copolymer is 1:2-4;

[0039] Furthermore, the mass ratio of the C14-22 alcohol / C12-20 alkyl glucoside, the cetearyl alcohol, the behenol, the dioctyl carbonate / tocopherol, and the dibutyl adipic acid is 1:1.5-2:0.8-1.2:4-6:4-6;

[0040] Furthermore, by mass percentage, component D accounts for 0.1%-5% of the raw materials of the cosmetic.

[0041] Furthermore, the polyol comprises 1,3-propanediol and / or 1,2-hexanediol. Even further, the polyol constitutes 3%-9% of the raw materials of the cosmetic product by weight percentage.

[0042] Furthermore, by mass percentage, component B accounts for 0.1%-0.6% of the raw materials of the cosmetic.

[0043] Furthermore, by mass percentage, component C accounts for 20%-35% of the raw materials of the cosmetic.

[0044] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0045] Based on extensive experimental research, the inventors of this invention unexpectedly combined sunflower seed oil, jojoba seed oil, grape seed oil, and camellia seed oil from natural plant sources during experiments, achieving surprising moisturizing and skin-repairing effects. Compared to their individual or partial combinations, these oils exhibit significantly superior and more balanced effects. In particular, significant moisturizing and skin-repairing effects can be achieved with only a small amount of these oils, making them suitable for addition and use in cosmetics without the need for excessive emulsifiers for additional emulsification and dispersion. This results in a better user experience, better stability, and avoids the irritation that may result from the use of additional emulsifiers. Experimental results show that the natural plant oil composition of the above four components of this invention has a long-lasting moisturizing effect, can form a partially occluded liquid film on the skin surface, and quickly diffuses into the gaps between stratum corneum cells, softening the tissue and thus providing a moisturizing effect. This product offers a dual effect of moisturizing and lubricating the skin, and also demonstrates significant improvement in skin repair tests, such as greatly reducing transepidermal water loss. Analysis suggests this may be due to an unexpected synergistic effect, allowing the individual moisturizing and repairing components to maximize their respective functions and work together to rapidly deliver the active ingredients to specific areas, such as the skin surface. While many natural plant oils possess moisturizing or repairing properties, maximizing their effectiveness, even exceeding their inherent limitations, has always been a goal pursued by those skilled in the art. Based on experiments and research, the inventors of this invention have proposed a specific composition of four natural plant oils that, at the same concentration, achieves better moisturizing and repairing effects compared to single or partially combined oil ingredients. Attached Figure Description

[0046] Figure 1 The graphs show the changes in skin moisture content over time in the moisturizing effect test of the products obtained in Application Examples 1-4 and Comparative Examples 1-14 of this invention.

[0047] Figure 2 The graph shows the change of transdermal water loss rate (TEWL) over time in the repair test of the products obtained from Application Examples 1-4 and Comparative Examples 1-14 of this invention. Detailed Implementation

[0048] This invention provides a natural plant oil composition that can achieve excellent moisturizing and skin repair effects in cosmetics with a small amount of additives, comprising a combination of sunflower seed oil, jojoba seed oil, grape seed oil, and camellia seed oil.

[0049] Sunflower seed oil

[0050] Sunflower seed oil is primarily composed of unsaturated fatty acids (including linoleic acid, oleic acid, and trace amounts of arachidonic acid) and saturated fatty acids (including palmitic acid, stearic acid, and behenic acid), with unsaturated fatty acids making up the majority. Some studies suggest that linoleic acid is the most important essential fatty acid for human nutrition, as it can be converted in the body into arachidonic acid, a 20-carbon compound with four double bonds. The body mainly uses essential fatty acids to synthesize phospholipids, which are components of all cellular structures, especially mitochondria. A deficiency in linoleic acid alters mitochondrial structure, initially manifesting as skin lesions due to water metabolism disorders (dry skin, thickened scaling), and in severe cases, even death. Linoleic acid also plays a crucial role in maintaining cell membrane softness, elasticity, and mobility, contributing significantly to maintaining metabolic balance, regulating blood pressure, and lowering serum cholesterol.

[0051] Jojoba oil

[0052] Jojoba oil (also known as jojoba seed oil) is extracted from the kernel of the jojoba tree. Its fatty acid composition is roughly as follows: 11-eicosenoic acid, 13-icosadienoic acid, oleic acid, palmitoleic acid, and saturated fatty acids (mainly palmitic acid). Unlike other natural oils, it is not a triglyceride, but rather an ester composed of long-chain monounsaturated fatty acids and long-chain monounsaturated fatty alcohols (i.e., long-chain liquid wax esters). Jojoba oil exhibits good stability at both temperatures, strong antioxidant properties, and minimal viscosity change with temperature variations. It is easily absorbed by the skin and miscible with sebum. It is an excellent emollient; the oil film it forms, unlike mineral oil, allows for the permeation of evaporated water while controlling moisture loss. Numerous safety and toxicological tests have confirmed that jojoba oil is very safe for use as a cosmetic oil, does not cause acne or allergies, and can alleviate psoriasis symptoms. Studies on transdermal absorption show that it penetrates the skin rapidly, with absorption clearly occurring through pores and hair follicles.

[0053] Grapeseed oil

[0054] Grape seed extract (also known as grape seed oil) is one of the most potent antioxidants found to date from plant sources. In vivo and in vitro studies have shown that the antioxidant effect of grape seed extract is 30-50 times that of vitamin C and vitamin E. Numerous researchers both domestically and internationally have discovered through experiments that grape seed extract possesses multiple benefits, including preventing atherosclerosis, anticoagulation, increasing high-density lipoprotein (HDL) or high-density lipoprotein cholesterol, inhibiting the oxidation of low-density lipoprotein (LDL), scavenging free radicals, and anti-cancer and anti-tumor effects. Grape seeds are obtained by separating the stems, skins, and pulp of grapes. They contain various amino acids, fatty acids, polyphenols, and vitamins E, K, Ca, P, Mg, Fe, and Mn. The main amino acids are glutamic acid and glycine; the main fatty acids include linoleic acid, palmitic acid, stearic acid, and linolenic acid; and the polyphenols include phenolic acids, flavonoids, proanthocyanidins, resveratrol, anthocyanins, and tannins. Grape seed oil is an oil product extracted from grape seeds. Grape seeds contain 10%–14% fat and have antioxidant, vasodilatory, and cholesterol-lowering effects. Studies have found that vitamin E in grape seed oil has significant antioxidant effects. Grape seeds are rich in polyphenols, a natural antioxidant. For example, adding grape seed products to face masks can enhance their whitening effects; adding an appropriate amount of grape seed oil to shampoo can improve its antioxidant capacity.

[0055] Tea seed oil

[0056] Camellia seed oil is a non-drying oil extracted from the seeds of plants in the Camellia genus of the Theaceae family. Also known as tea seed oil, tea tree oil, or camellia seed oil, its natural fatty acid composition and structure are essentially the same as olive oil, earning it the nickname "Oriental Olive Oil." Camellia seed oil is rich in beauty acids (generally referring to oleic acid and linoleic acid containing double bonds and their triglycerides), camellia glycosides, tea polyphenols, phospholipids, saponins, tannins, phytosterols, natural tocopherols, and squalane. Experimental results show that camellia seed oil has a significantly better UV absorption effect than aloe vera oil and olive oil, and when combined with the simple physical sunscreen nano-titanium dioxide, it achieves excellent sun protection.

[0057] This invention unexpectedly combines the above four natural plant-derived oils. Practice has shown that they have a synergistic effect of moisturizing and repairing, and at the same content, they achieve better moisturizing and repairing effects than single oil raw materials or other combinations.

[0058] The composition of the present invention can exhibit a repairing effect that is superior to that of conventional polyol moisturizers, while demonstrating a similar moisturizing effect to that of conventional polyol moisturizers.

[0059] The combination of ingredients in this invention is derived from natural plants, has few side effects, high safety, simple preparation method, minimal environmental impact, conforms to ESG (Environmental, Social and Governance) principles, and is beneficial to consumer experience.

[0060] The above-mentioned solution will be further described below with reference to specific embodiments; it should be understood that these embodiments are used to illustrate the basic principles, main features and advantages of the present invention, and the present invention is not limited to the scope of the following embodiments; the implementation conditions used in the embodiments can be further adjusted according to specific requirements, and the implementation conditions not specified are usually the conditions in conventional experiments.

[0061] Unless otherwise specified in the following examples, all raw materials are commercially available or prepared by conventional methods in the art.

[0062] Examples 1-4

[0063] These embodiments provide a natural plant oil composition and a method for preparing the same. The formulation of the natural plant oil composition is shown in Table 1.

[0064] Table 1

[0065]

[0066] The preparation method of this natural plant oil composition includes: mixing the components evenly to form the product;

[0067] The sunflower seed oil is prepared by the following method: Oil is extracted from sunflower seeds using a physical pressing machine, then filtered to remove suspended solids and impurities, yielding crude oil. Hydrated phospholipids (HP) are removed from the crude oil by adding hot water at approximately 65°C (about 1% of the oil weight), followed by removal of non-hydrated phospholipids (NHP) using citric acid. The oil is then neutralized with a sodium hydroxide aqueous solution. The oil is then heated to 82°C and rinsed with hot water at 90°C to separate the oil and water. This process is repeated twice. The separated oil is heated to 95°C and rapidly dried in a vacuum dryer. The oil temperature is then raised to approximately 92°C, and bleaching clay is added at 1.2% of the oil weight for decolorization. Finally, the oil is deodorized under vacuum at 235°C to obtain the sunflower seed oil.

[0068] The jojoba seed oil is prepared by the following method: Washed and dried jojoba seeds are ground into powder using a grinder and added to a tank. Liquid carbon dioxide is then introduced into the tank at isobaric pressure, submerging the jojoba seed powder. Extraction is carried out at 42±2℃ and 7±0.05MPa. After extraction, the mixture is filtered, and the clear liquid is separated and introduced into a vacuum tank. The temperature is lowered to 12.5±2.5℃, and the liquid carbon dioxide is recovered while the pressure is reduced. The solidified waxy jojoba seed oil is then removed, heated to 32.5±2.5℃, and then cooled to room temperature to obtain the jojoba seed oil.

[0069] The grape seed oil is prepared by the following method: grape seed powder and hexane (the mass ratio of grape seed powder to hexane is 20:1) are mixed, and then extracted by heating at about 62°C. After extraction, the hexane is evaporated to obtain crude oil. The crude oil is then removed by adding hot water at about 65°C to remove hydrated phospholipids, and then by removing non-hydrated phospholipids with citric acid. The crude oil is then neutralized with an aqueous sodium hydroxide solution, heated to 82.5±2.5°C, and rinsed with hot water at 90°C to separate the oil and water. This process is repeated twice. The separated oil is then heated to 90°C, and activated carbon is added at 4% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 70°C, the oil is pumped out to remove the activated carbon, and then vacuum deodorized at about 175°C to obtain the grape seed oil.

[0070] The camellia seed oil is prepared by the following method: Shelled camellia seeds are pressed to extract oil, then filtered to remove oil residue, yielding crude oil. The crude oil is then treated with hot water at approximately 65°C to remove hydrated phospholipids, followed by the removal of non-hydrated phospholipids with citric acid. The oil is then neutralized with a sodium hydroxide aqueous solution, heated to 82.5±2.5°C, and rinsed with hot water at 90°C to separate the oil and water. This process is repeated twice. The separated oil is then heated to 90°C, and activated carbon is added at 4% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 70°C, the oil is pumped out to remove the activated carbon, and then vacuum deodorized at approximately 260°C to obtain the camellia seed oil.

[0071] Comparative Examples 1-14

[0072] These comparative examples provide a moisturizer or composition, the specific formulations of which are shown in Tables 2 and 3, respectively.

[0073] Table 2

[0074]

[0075]

[0076] Table 3

[0077]

[0078] The preparation method is the same as in Example 1;

[0079] The olive fruit oil is prepared by the following method: Olive fruits are crushed into a uniform slurry using a hammer crusher; oil and water are separated using a cold press to extract the first cold-pressed oil; the water introduced during the first cold press is removed using a vertical centrifuge to obtain the raw oil; free fatty acids in the raw oil are removed using sodium hydroxide; the oil is then heated to 82.5±2.5℃ and rinsed with hot water at 90℃ to separate the oil and water. This process is repeated twice. The separated oil is then heated to 90℃, and activated carbon is added at 4% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 70℃, the oil is pumped out to remove the activated carbon, and finally, the olive fruit oil is deodorized under vacuum at approximately 190℃.

[0080] The avocado oil is prepared by the following method: Avocado pulp is mechanically ground into small, rice-grain-sized pieces, then extracted with ethyl acetate solvent at a weight ratio of 3:1 (solvent:avocado), filtered, and the solvent is removed by rotary evaporation to obtain crude avocado oil. The crude avocado oil is heated to boiling to remove moisture. The crude oil is preheated to approximately 60°C, then phosphoric acid is added, and after thorough mixing, the phospholipids that have formed clumps are removed to obtain clear, degummed oil. The acid is removed with sodium hydroxide, and the oil is washed with warm water until neutral. The oil is then heated to 90°C, and activated carbon is added at 4% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 70°C, the oil is pumped out to remove the activated carbon, and finally, the oil is vacuum deodorized at approximately 200°C to obtain the avocado oil.

[0081] The macadamia seed oil is prepared by the following method: the washed and dried macadamia seeds are ground into powder using a pulverizer, and then the oil is extracted by mechanical physical pressing. The oil is then filtered to remove suspended solids and impurities to obtain crude oil. Sodium hydroxide is used to remove free fatty acids from the crude oil. The oil is then heated to 90°C, and activated carbon is added at 4% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 70°C, the oil is pumped out to remove the activated carbon, and finally, the oil is vacuum deodorized at around 190°C to obtain the macadamia seed oil.

[0082] Application Example 1

[0083] This example provides a skin cream product, the formula of which is shown in Table 4.

[0084] Table 4

[0085]

[0086] The preparation methods for skin cream products include:

[0087] 1. Aqueous phase preparation: At room temperature, add component B raw material to component A raw material, disperse it thoroughly and evenly, and then heat it to 80±5℃;

[0088] 2. Oil phase preparation: After metering the raw material of component C, heat it at high temperature until it is completely dissolved (80±5℃);

[0089] 3. Initial emulsification: The oil phase is added to the aqueous phase for emulsification. After emulsification, the temperature is lowered to 40°C.

[0090] 4. Secondary emulsification: The raw material of component D is added to the emulsion obtained from the primary emulsification and subjected to secondary emulsification to obtain a skin cream product.

[0091] Application Example 2

[0092] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Example 2.

[0093] Application Example 3

[0094] This example provides a skin cream product, which is basically the same as application example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in example 3.

[0095] Application Example 4

[0096] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Example 4.

[0097] Application Comparative Example 1

[0098] This example provides a skin cream product, which is basically the same as application example 1, except that the raw material of component D is replaced with the moisturizer glycerin in comparative example 1.

[0099] Application Comparative Example 2

[0100] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw materials in group D are replaced with the moisturizer 1,3-propanediol in Comparative Example 2.

[0101] Application Comparative Example 3

[0102] This example provides a skin cream product, which is basically the same as application example 1, except that the raw material of component D is replaced with the moisturizer butylene glycol of comparative example 3.

[0103] Application Comparative Example 4

[0104] This example provides a skin cream product, which is basically the same as application example 1, except that the raw material of component D is replaced with sunflower seed oil of comparative example 4.

[0105] Application Comparative Example 5

[0106] This example provides a skin cream product that is basically the same as application example 1, except that the raw material of component D is replaced with jojoba seed oil of comparative example 5.

[0107] Application Comparative Example 6

[0108] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with grape seed oil of Comparative Example 6.

[0109] Application Comparative Example 7

[0110] This example provides a skin cream product, which is basically the same as application example 1, except that the raw material of component D is replaced with camellia seed oil of comparative example 7.

[0111] Application Comparative Example 8

[0112] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Comparative Example 8.

[0113] Application Comparison Example 9

[0114] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Comparative Example 9.

[0115] Application Comparison Example 10

[0116] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Comparative Example 10.

[0117] Application Comparative Example 11

[0118] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Comparative Example 11.

[0119] Application Comparative Example 12

[0120] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Comparative Example 12.

[0121] Application Comparative Example 13

[0122] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Comparative Example 13.

[0123] Application Comparative Example 14

[0124] This example provides a skin cream product, which is basically the same as Application Example 1, except that the raw material of component D is replaced with the natural plant oil composition obtained in Comparative Example 14.

[0125] Performance testing

[0126] The skin cream products obtained from Application Examples 1-4 and Comparative Examples 1-14 (hereinafter referred to as test products) were tested for moisturizing and repairing efficacy. The test methods and results are as follows:

[0127] I. Moisturizing effect

[0128] 1. Testing Method

[0129] a. The test site (inner forearm) was left to stand for 30 minutes under constant temperature and humidity. b. The skin stratum corneum moisture content was measured before product use and 2 hours, 4 hours, 6 hours, and 8 hours after use. c. The sample was prepared at a concentration of (2.0 ± 0.1) mg / cm³. 2 Apply the sample in a single coat using the specified amount of latex, and then apply the sample evenly to the test area while wearing a latex finger cot.

[0130] 2. Evaluation criteria: Improvement value of skin stratum corneum moisture content = Moisture content value after use - Moisture content value before use. The method for determining the moisture content value is: refer to QB / T 4256—2011 "Guidelines for Evaluation of Moisturizing Efficacy of Cosmetics".

[0131] 3. Testing instrument: Corneometer, CM825 [COURAGE KHAZAKA, Germany].

[0132] 4. Test environment: Temperature: 21.0℃±1.0℃; Humidity: 50%±10%.

[0133] The test results are shown in Table 5.

[0134] Table 5

[0135]

[0136]

[0137] See the graph showing changes in skin moisture content under various conditions. Figure 1 As shown.

[0138] 5. Test Result Analysis:

[0139] 1) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of the test product in Example 1 increased significantly after 2 hours, 4 hours, 6 hours and 8 hours of use, respectively, by 14.13, 14.87, 14.13 and 12.23, respectively. The moisture content increase rates were 33.97%, 35.74%, 33.97% and 29.41%, respectively, indicating that the test product has a significant moisturizing effect.

[0140] 2) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of the test product in Example 2 increased significantly after 2 hours, 4 hours, 6 hours and 8 hours of use, respectively, by 14.40, 14.30, 13.87 and 12.34, respectively. The moisture content increase rates were 34.75%, 34.51%, 33.47% and 29.78%, respectively, indicating that the test product has a significant moisturizing effect.

[0141] 3) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of the test product in Example 3 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 13.47, 13.97, 13.20, and 12.10, respectively. The moisture content increase rates were 33.56%, 34.80%, 32.89%, and 30.15%, respectively, indicating that the tested product has a significant moisturizing effect.

[0142] 4) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of the test product in Example 4 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 13.03, 13.80, 13.40, and 12.07, respectively. The moisture content increase rates were 33.00%, 34.94%, 33.92%, and 30.55%, respectively, indicating that the tested product has a significant moisturizing effect.

[0143] 5) As can be seen from the moisturizing effect tests of Examples 1, 2, 3 and 4, the skin moisture content of the test products of raw materials 1-4 of the present invention increased by about 33-35% after 2 hours and by 29-31% after 8 hours, which shows that it has a significant moisturizing effect.

[0144] 6) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 1 increased slightly after 2 hours, 4 hours, 6 hours, and 8 hours of use, by 12.90, 9.23, 3.80, and 2.83, respectively, with moisture content improvement rates of 31.96%, 22.87%, 9.41%, and 7.02%. Although the moisture content improvement rate after 2 hours was similar to that of the raw material test product of the present invention, the moisture content improvement rate after 8 hours was significantly lower than that of the test product of the present invention, indicating that the long-lasting moisturizing effect of Comparative Example 1 was inferior to that of the raw material test product of the present invention.

[0145] 7) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 2 increased slightly after 2 hours, 4 hours, 6 hours, and 8 hours of use, by 11.04, 7.17, 5.97, and 6.00, respectively, with moisture content increase rates of 26.00%, 16.89%, 14.06%, and 14.14%. Both the increase value and the increase rate of moisture content were lower than those of the raw material test product of the present invention, indicating that the moisturizing effect, especially the long-lasting moisturizing effect, of Comparative Example 2 was significantly worse than that of the raw material test product of the present invention.

[0146] 8) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 3 increased after 2 hours, 4 hours, 6 hours, and 8 hours of use, respectively, by 6.00, 7.07, 6.80, and 5.10, with moisture content increase rates of 14.60%, 17.19%, 16.55%, and 12.41%. Both the increase value and the increase rate of moisture content were lower than those of the raw material test product of the present invention, indicating that the moisturizing effect, especially the long-lasting moisturizing effect, of Comparative Example 3 was significantly worse than that of the raw material test product of the present invention.

[0147] 9) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 4 increased slightly after 2 hours, 4 hours, 6 hours, and 8 hours of use, by 9.07, 7.60, 6.14, and 2.87, respectively. The moisture content increase rates were 22.10%, 18.52%, 14.95%, and 6.99%, respectively. Both the increase value and the increase rate of moisture content were lower than those of the raw material test product of the present invention, indicating that the moisturizing effect, especially the long-lasting moisturizing effect, of Comparative Example 4 was significantly worse than that of the raw material test product of the present invention.

[0148] 10) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 5 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 13.27, 11.00, 11.27, and 8.90, respectively. The moisture content increase rates were 31.89%, 26.44%, 27.08%, and 21.39%, respectively. However, both the increase value and the rate of increase in moisture content were lower than those of the raw material test product of this invention, indicating that the moisturizing effect of Comparative Example 5 was inferior to that of the raw material test product of this invention.

[0149] 11) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 6 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 10.20, 10.70, 9.40, and 9.46, respectively. The moisture content growth rates were 25.46%, 26.71%, 23.46%, and 23.61%, respectively. However, the increase in moisture content and the rate of increase in moisture content were both lower than those of the raw material test product of this invention, indicating that the moisturizing effect of Comparative Example 6 was inferior to that of the raw material test product of this invention.

[0150] 12) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 7 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 13.07, 8.47, 7.04, and 7.50, respectively. The moisture content growth rates were 31.92%, 20.68%, 17.18%, and 18.32%, respectively. However, the increase in moisture content and the rate of increase in moisture content were both lower than those of the raw material test product of this invention, indicating that the moisturizing effect of Comparative Example 7 was worse than that of the raw material test product of this invention.

[0151] 13) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 8 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 9.30, 9.07, 7.03, and 7.70, respectively. The moisture content growth rates were 25.83%, 25.19%, 19.54%, and 21.39%, respectively. However, the increase in moisture content and the rate of increase in moisture content were both lower than those of the raw material test product of this invention, indicating that the moisturizing effect of Comparative Example 8 was worse than that of the raw material test product of this invention.

[0152] 14) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 9 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 12.40, 10.47, 8.10, and 8.67, respectively. The moisture content growth rates were 34.54%, 29.16%, 22.56%, and 24.14%, respectively. However, the increase in moisture content and the rate of increase in moisture content were both lower than those of the raw material test product of the present invention, indicating that the moisturizing effect of Comparative Example 9 was worse than that of the raw material test product of the present invention.

[0153] 15) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 10 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 8.17, 7.07, 5.67, and 5.90, respectively. The moisture content growth rates were 20.89%, 18.07%, 14.49%, and 15.09%, respectively. However, the increase in moisture content and the rate of increase in moisture content were both lower than those of the raw material test product of this invention, indicating that the moisturizing effect of Comparative Example 10 was inferior to that of the raw material test product of this invention.

[0154] 16) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 11 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 10.74, 10.14, 9.30, and 5.04, respectively. The moisture content growth rates were 26.55%, 25.06%, 23.00%, and 12.45%, respectively. However, the increase in moisture content and the rate of increase in moisture content were both lower than those of the raw material test product of the present invention, indicating that the moisturizing effect of Comparative Example 11 was worse than that of the raw material test product of the present invention.

[0155] 17) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 12 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 14.17, 13.54, 13.57, and 12.70, respectively. The moisture content growth rates were 33.46%, 31.97%, 32.05%, and 30.00%, respectively. The increase in moisture content and the rate of increase were similar to those of the raw material test product of the present invention, indicating that the moisturizing effect of Comparative Example 12 was similar to that of the raw material test product of the present invention.

[0156] 18) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 13 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 15.47, 15.30, 14.60, and 13.04, respectively. The moisture content growth rates were 38.55%, 38.12%, 36.38%, and 32.49%, respectively. The increase in moisture content and the rate of increase were close to those of the raw material test product of the present invention, indicating that the moisturizing effect of Comparative Example 13 was similar to that of the raw material test product of the present invention.

[0157] 19) Data analysis showed that, compared with before product use, the skin stratum corneum moisture content of Comparative Example 14 increased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with increases of 14.93, 14.83, 13.93, and 12.83, respectively. The moisture content growth rates were 35.15%, 34.92%, 32.80%, and 30.21%, respectively. The increase in moisture content and the rate of increase were close to those of the raw material test product of the present invention, indicating that the moisturizing effect of Comparative Example 14 was similar to that of the raw material test product of the present invention.

[0158] 20) The skin moisture content test results showed that all 4 raw material samples and 14 control raw material samples exhibited certain moisturizing effects, but the effects differed. The glycerin, propylene glycol, and butylene glycol samples (applied to comparative examples 1-3) showed high moisturizing effects after 2 hours, but the skin moisture increase rate was only 7-14% after 8 hours, indicating the lowest moisturizing effect. The sunflower seed oil single-raw material sample (applied to comparative example 4) showed a skin moisture increase rate of 6.99% after 8 hours, with a moisturizing effect comparable to polyols. The jojoba seed oil, grape seed oil, and camellia seed oil single-raw material samples (applied to comparative examples 5-7) showed a skin moisture increase rate of 18%-23% after 8 hours, with a better moisturizing effect than the polyol samples. Three of the following were selected: sunflower seed oil, jojoba seed oil, grape seed oil, and camellia seed oil. The skin moisture increase rate of the test products with compound raw materials (Application Comparative Examples 8-11) after 8 hours was 12-24%. Compared with the test products with single plant oil raw materials, the moisturizing effect was unstable. Some combinations (Application Comparative Examples 8 and 9) were better than the single raw material test products, while some combinations (Application Comparative Examples 10 and 11) were worse than the single raw material test products. When the four plant oils were compounded together, they showed a better synergistic effect. The skin moisture content increase rate of the test products (Application Examples 1-4 of this invention) after 8 hours was 29-31%, and the moisturizing effect was significantly improved and more stable, reaching the optimal moisturizing effect. When olive fruit oil and avocado oil were used to replace camellia seed oil, or macadamia seed oil was used to replace jojoba seed oil, the skin moisture increase rate of the test products (Application Comparative Examples 12-14) after 8 hours was 30-32%, which was similar to the moisturizing effect of the raw material test products of this invention.

[0159] II. Repair Test

[0160] 1. Testing Method

[0161] a. The test site (inner forearm) was left to stand for 30 minutes under constant temperature and humidity. b. The transepidermal water loss rate of the skin was measured before product use and 2 hours, 4 hours, 6 hours, and 8 hours after use. c. The sample was measured at (2.0 ± 0.1) mg / cm³. 2 Apply the sample in a single coat using the specified amount of latex, and then apply the sample evenly to the test area while wearing a latex finger cot.

[0162] 2. Evaluation criteria: Improvement value of skin transepidermal water loss rate = skin transepidermal water loss rate before use - skin transepidermal water loss rate after use. The method for determining the water loss rate is: T / CAB 0152-2022 "Test Methods for Seven Efficacy Items of Cosmetics: Anti-wrinkle, Firming, Moisturizing, Oil Control, Repairing, Nourishing and Soothing".

[0163] 3. Testing instrument: Corneometer, CM825 [COURAGE KHAZAKA, Germany]

[0164] 4. Test environment: Temperature: 21.0℃±1.0℃; Humidity: 50%±10%.

[0165] The test results are shown in Table 6.

[0166] Table 6

[0167]

[0168] The graph shows the changes in skin water loss rate under various conditions. Figure 2 As shown.

[0169] 5. Test Result Analysis:

[0170] 1) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the test product in Example 1 decreased significantly after 2 hours, 4 hours, 6 hours and 8 hours of use, with decreases of 4.15, 3.84, 4.88 and 5.25, respectively. The improvement rates were 37.42%, 34.63%, 44.00% and 47.34%, respectively, indicating that the test sample had a significant repair effect.

[0171] 2) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the test product in Example 2 decreased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 3.89, 3.79, 4.48, and 5.3, respectively. The improvement rates were 35.56%, 34.64%, 40.95%, and 48.45%, respectively, indicating that the test product has a significant repair effect.

[0172] 3) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the test product in Example 3 decreased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 3.49, 3.70, 4.05, and 5.11, respectively. The improvement rates were 32.71%, 34.68%, 37.96%, and 47.89%, respectively, indicating that the tested product has a significant repair effect.

[0173] 4) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the test product in Example 4 decreased significantly after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 3.66, 3.82, 4.32, and 5.06, respectively. The improvement rates were 34.05%, 35.53%, 40.19%, and 47.07%, respectively, indicating that the tested product has a significant repair effect.

[0174] 5) The repair test results of Examples 1, 2, 3 and 4 show that the TEWL improvement rate of the raw material test products of the present invention within the combination range reaches 47%-48% after 8 hours, which has a significant repair effect.

[0175] 6) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was improved after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 1.22, 0.08, 1.38, and 1.61, respectively, and improvement rates of 15.66%, 1.03%, 17.72%, and 20.67%, respectively. However, the improvement rates were all lower than those of the raw material test product of this invention, indicating that the test product of Comparative Example 1 has a repair effect, but its repair effect is worse than that of the test product of this invention.

[0176] 7) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was improved after 2 hours, 4 hours, 6 hours, and 8 hours of use, with the values ​​decreasing by 1.89, 1.38, 0.88, and 1.02, respectively, and the improvement rates were 24.02%, 17.53%, 11.18%, and 12.96%, respectively. However, the improvement rates were all lower than those of the raw material test product of the present invention, indicating that the test product of Comparative Example 2 has a repair effect, but its repair effect is worse than that of the test product of the present invention.

[0177] 8) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was improved after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 1.92, 0.49, 1.62, and 1.68, respectively, and improvement rates of 22.91%, 5.85%, 19.33%, and 20.05%, respectively. However, the improvement rates were all lower than those of the raw material test product of this invention, indicating that the test product of Comparative Example 3 has a repair effect, but its repair effect is worse than that of the test product of this invention.

[0178] 9) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was improved after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 1.83, 1.56, 1.96, and 2.21, respectively, and improvement rates of 22.34%, 19.05%, 23.93%, and 26.98%, respectively. However, the improvement rates were all lower than those of the raw material test product of this invention, indicating that the comparative example 4 test product has a repair effect, but its repair effect is worse than that of the raw material test product of this invention.

[0179] 10) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 2.45, 1.91, 1.63, and 3.28, respectively, and improvement rates of 28.13%, 21.93%, 18.71%, and 37.66%, respectively. However, the improvement rates were all lower than those of the raw material test product of this invention, indicating that the comparative example 5 test product has a repair effect, but its repair effect is worse than that of the raw material test product of this invention.

[0180] 11) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 2.34, 2.25, 2.36, and 2.38, respectively, and improvement rates of 27.96%, 26.82%, 28.13%, and 28.37%, respectively. However, the improvement rates were all lower than those of the raw material test product of this invention, indicating that the comparative example 6 test product has a repair effect, but its repair effect is worse than that of the raw material test product of this invention.

[0181] 12) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 1.60, 0.86, 1.48, and 2.22, respectively, and improvement rates of 21.77%, 11.70%, 20.14%, and 30.20%, respectively. However, the improvement rates were all lower than those of the raw material test product of the present invention, indicating that the comparative example 7 test product has a repair effect, but its repair effect is worse than that of the raw material test product of the present invention.

[0182] 13) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 3.61, 1.59, 4.56, and 4.79, respectively, and improvement rates of 32.03%, 14.11%, 40.46%, and 42.50%, respectively. However, the improvement rates were all lower than those of the raw material test product of the present invention, indicating that the comparative example 8 test product has a repair effect, but its repair effect is worse than that of the raw material test product of the present invention.

[0183] 14) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours and 8 hours of use, respectively, with decreases of 3.24, 1.51, 3.73 and 4.92, respectively. The improvement rates were 30.28%, 14.11%, 34.86% and 45.98%, respectively. However, the improvement rates were all lower than those of the raw material test product of the present invention, indicating that the comparative example 9 test product has a repair effect, but its repair effect is worse than that of the raw material test product of the present invention.

[0184] 15) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 2.83, 3.00, 3.70, and 4.47, respectively. The improvement rates were 27.61%, 29.27%, 36.10%, and 43.61%, respectively. However, the improvement rates were all lower than those of the raw material test product of this invention, indicating that the comparative example 10 test product has a repair effect, but its repair effect is worse than that of the raw material test product of this invention.

[0185] 16) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 2.95, 2.47, 3.26, and 4.04, respectively, and improvement rates of 30.70%, 25.70%, 33.92%, and 42.04%, respectively. However, the improvement rates were all lower than those of the raw material test product of the present invention, indicating that the comparative example 11 test product has a repair effect, but its repair effect is worse than that of the raw material test product of the present invention.

[0186] 17) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 2.04, 2.14, 2.40, and 2.77, respectively. The improvement rates were 24.20%, 25.39%, 28.47%, and 32.86%, respectively. However, the improvement rates were all lower than those of the raw material test product of this invention, indicating that the comparative example 12 test product had a repair effect, but its repair effect was worse than that of the raw material test product of this invention.

[0187] 18) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 2.30, 2.60, 2.87, and 3.06, respectively. The improvement rates were 25.64%, 28.99%, 32.00%, and 34.11%, respectively. However, the improvement rates were all lower than those of the raw material test product of this invention, indicating that the comparative example 13 test product had a repair effect, but its repair effect was worse than that of the raw material test product of this invention.

[0188] 19) Data analysis showed that, compared with before product use, the transepidermal water loss rate of the skin was significantly reduced after 2 hours, 4 hours, 6 hours, and 8 hours of use, with decreases of 2.42, 2.65, 3.01, and 3.27, respectively, and improvement rates of 25.37%, 27.78%, 31.55%, and 34.28%, respectively. However, the improvement rates were all lower than those of the raw material test product of the present invention, indicating that the application of the comparative example 14 test product had a repair effect, but its repair effect was worse than that of the raw material test product of the present invention.

[0189] 20) The results of the transdermal water loss rate (TEWL) test showed that all 4 samples of the raw material tested in this invention and 14 samples of the comparative raw material tested exhibited certain repair effects, but the effects differed. The glycerin, propylene glycol, and butylene glycol samples (used in comparative examples 1-3) showed the lowest TEWL improvement rate after 8 hours (12-20%). The single-raw material samples of sunflower seed oil, jojoba seed oil, grape seed oil, and camellia seed oil (used in comparative examples 4-7) showed a TEWL improvement rate of 27-37% after 8 hours, with better repair effects than the polyol samples. The samples of sunflower seed oil, jojoba seed oil, grape seed oil, and camellia seed oil (used in comparative examples 8-11) showed a TEWL improvement rate of 27.5-32.5% after 2 hours. After 4 hours, the TEWL improvement rate was 14-30%, after 6 hours it was 34-40.5%, and after 8 hours it was 42-46%, showing a better repair effect than the single vegetable oil raw material test product. When four vegetable oils were compounded together, the TEWL improvement rate of the test products (Application Examples 1-4 of this invention) was 32-38% after 2 hours, 34-36% after 4 hours, 38-44% after 6 hours, and 47-48.5% after 8 hours, achieving the highest repair effect. When olive fruit oil and avocado oil with similar linoleic acid content were used to replace camellia seed oil, or macadamia seed oil was used to replace jojoba seed oil, the TEWL improvement rate of the test products (comparative examples 12-14) after 8 hours was 32-35%, which was lower than the improvement rate of the raw material test products of the present invention, indicating that their repair effect was weaker than that of the raw material of the present invention; in addition, the repair effect of comparative examples 8-11 was far worse than that of the application examples composition of the present invention, both in terms of timely repair effect and long-term repair effect.

[0190] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

[0191] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

Claims

1. A natural plant oil composition, characterized in that, The natural plant oil composition consists of sunflower seed oil, jojoba seed oil, grape seed oil, and camellia seed oil. The mass ratio of the sunflower seed oil, the jojoba seed oil, the grape seed oil, and the camellia seed oil is 1:0.5-1.5:0.5-1.5:0.5-1.

5. In terms of mass percentage, the natural plant oil composition comprises 20%-30% sunflower seed oil, 20%-30% jojoba seed oil, 20%-30% grape seed oil, and 20%-30% camellia seed oil.

2. The natural plant oil composition according to claim 1, characterized in that, The method for preparing the sunflower seed oil includes: Oil is extracted from sunflower seeds by pressing, then filtered to remove suspended solids and impurities to obtain crude oil. The crude oil is then removed by adding hot water and / or alkaline solution to remove hydrated phospholipids, and non-hydrated phospholipids are removed by citric acid. Finally, the crude oil is neutralized by alkaline solution. Then heat to 80-85℃ and rinse with hot water to separate the oil and water. Repeat this process several times. Finally, the sunflower seed oil is obtained through drying, bleaching, and deodorization.

3. The natural plant oil composition according to claim 2, characterized in that, The hot water used to remove the hydrated phospholipids and the hot water used for rinsing are both 60-95°C.

4. The natural plant oil composition according to claim 2, characterized in that, The bleaching process involves heating the dried crude oil to 90-95°C, and then adding bleaching clay at a weight of 1.0%-1.5% of the oil for bleaching.

5. The natural plant oil composition according to claim 2, characterized in that, The deodorization is carried out at 230-240℃ under vacuum conditions.

6. The natural plant oil composition according to claim 1, characterized in that, The method for preparing the jojoba seed oil includes: Jojoba seeds are ground into powder and added to a tank. Then, liquefied carbon dioxide is introduced into the tank at isobaric pressure to immerse the jojoba seed powder in the tank. The mixture is then treated at 40-45°C and 6.9-7.2 MPa. The mixture is then filtered to separate the clear liquid, which is introduced into a vacuum tank and cooled to 10-15°C while the carbon dioxide liquid is recovered. The solidified waxy jojoba seed oil is then removed, heated to melt, and then cooled to room temperature to obtain the jojoba seed oil.

7. The natural plant oil composition according to claim 1, characterized in that, The method for preparing the grape seed oil includes: Grape seed powder and hexane are mixed and then heated at 60-65℃ for extraction. After extraction, the hexane is evaporated to obtain crude oil. The hydrated phospholipids in the crude oil are then removed by adding hot water and / or alkaline solution to the crude oil. The non-hydrated phospholipids in the crude oil are then removed by citric acid. The oil is then neutralized with alkaline solution, heated to 80-85℃, and rinsed with hot water to separate the oil and water. This process is repeated several times. The oil is then heated to 85-95℃, and activated carbon is added at 3%-5% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 60-75℃, the oil is pumped out to remove the activated carbon, and vacuum deodorization is performed to obtain the grape seed oil.

8. The natural plant oil composition according to claim 7, characterized in that, The hot water used to remove the hydrated phospholipids and the hot water used for rinsing are both 60-95°C.

9. The natural plant oil composition according to claim 7, characterized in that, The mass ratio of grape seed powder to hexane is 15-25:

1.

10. The natural plant oil composition according to claim 7, characterized in that, The vacuum deodorization is carried out at 170-180℃.

11. The natural plant oil composition according to claim 1, characterized in that, The method for preparing the camellia seed oil includes: After pressing the shelled camellia seeds to extract the oil, the oil residue is removed by filtering to obtain crude oil. The crude oil is then treated by adding hot water and / or alkaline solution to remove hydrated phospholipids, followed by the removal of non-hydrated phospholipids with citric acid, neutralization with alkaline solution, heating to 80-85°C, and rinsing with hot water to separate oil and water. This process is repeated multiple times. The oil is then heated to 85-95℃, and activated carbon is added at 3%-5% of the oil weight for decolorization. After decolorization, the oil temperature is adjusted to 60-75℃, the oil is pumped out to remove the activated carbon, and vacuum deodorization is performed to obtain the camellia seed oil.

12. The natural plant oil composition according to claim 11, characterized in that, The hot water used to remove the hydrated phospholipids and the hot water used for rinsing are both 60-95°C.

13. The natural plant oil composition according to claim 11, characterized in that, The vacuum deodorization is carried out at 250-270℃.

14. A method for preparing a natural vegetable oil composition according to any one of claims 1-13, characterized in that, The preparation method includes: mixing the components evenly to form the product.

15. The use of any natural plant oil composition according to any one of claims 1-13 in the preparation of a cosmetic having moisturizing and skin-repairing effects.

16. The application according to claim 15, characterized in that, The raw materials of the cosmetic include component A, component B, component C, and component D; Component A includes water and polyols; Component B includes xanthan gum and ammonium acryloyldimethyl taurate / VP copolymer; The C component includes C14-22 alcohol / C12-20 alkyl glucoside, cetearyl alcohol, behenyl alcohol, dioctyl carbonate / tocopherol, and dibutyl adipate; Component D comprises the natural plant oil composition according to any one of claims 1-13.

17. The application according to claim 16, characterized in that, The mass ratio of xanthan gum to ammonium acryloyldimethyl taurate / VP copolymer is 1:2-4.

18. The application according to claim 16, characterized in that, The mass ratio of the C14-22 alcohol / C12-20 alkyl glucoside, the cetearyl alcohol, the behenol, the dioctyl carbonate / tocopherol, and the dibutyl adipic acid is 1:1.5-2:0.8-1.2:4-6:4-6.

19. The application according to claim 16, characterized in that, By weight percentage, component D accounts for 0.1%-5% of the raw materials of the cosmetic.

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