A product with the effect of improving skin condition and a preparation method and application thereof

Abstract

The application discloses a product with the effect of improving skin state and a preparation method and application thereof, and belongs to the technical field of cosmetics. The technical problem to be solved is that the moisturizing effect and the refreshing skin feeling cannot be considered under the condition of a high added amount of shea butter oil system, and a product with strong moisturizing power, long-term moisturizing effect and reduced water loss is provided. The technical solution points are that the raw materials include polyglyceryl-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax, shea butter oil, isononyl isononanoate, cetyl stearyl alcohol, AVC, tocopheryl acetate, phenoxyethanol, ethylhexylglycerin, 10% sodium hydroxide, glycerol, sodium hyaluronate and water.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, specifically to a product that improves skin condition, its preparation method, and its application. Background Technology

[0002] Shea butter, also known as avocado oil, is a natural oil extracted from the pulp of the shea tree (Shea butter tree) in West Africa. Shea butter appears as a pale yellow oil, a soft solid at room temperature. When applied to the skin, it melts easily, leaving a thin protective film that makes the skin feel incredibly soft and moisturized. Shea butter contains up to 80% triglycerides and approximately 9%-13% unsaponifiables, providing excellent skincare benefits. Its fatty acid composition is highly similar to human sebum, allowing it to form a thin, breathable protective film on the skin's surface, effectively reducing transepidermal water loss. It also penetrates the stratum corneum, repairing the damaged barrier and softening rough cuticles, significantly improving dry, cracked, and sensitive skin. Shea butter has a wide range of applications, possessing moisturizing, anti-aging, nourishing, and regenerating properties, and is commonly used in skincare products, sunscreens, makeup, and hair care products.

[0003] In conventional skincare products, shea butter is typically added at a concentration of 3%-15%, with a common addition of around 5%, providing both moisturizing benefits and a comfortable feel on the skin. Shea butter primarily functions as an emollient, filling the gaps between skin cells to make the skin smoother, softer, and more elastic. Its high stearic and oleic acid content forms a lipid protective film on the skin surface, reducing transepidermal water loss and achieving long-lasting hydration. In moisturizing formulas, shea butter can improve product stability, viscosity, and texture. Its semi-solid state at room temperature helps form a stable oil-in-water (O / W) emulsion, giving it a rich, creamy texture. It is compatible with various emulsifiers and plant oils, making it a multifunctional ingredient in natural organic skincare. However, because shea butter itself is relatively thick, high concentrations can easily lead to stickiness, poor absorption, and oily shine, directly limiting its use in lightweight, fast-absorbing skincare products. Therefore, this study aims to explore how to create a moisturizing yet lightweight hand cream with a high shea butter content.

[0004] Relevant patent documents retrieved: This document, published in China (CN108685770A) on October 23, 2018, discloses a skin cream and its preparation method, relating to the field of cosmetic technology. By weight, the skin cream comprises: 30-50 parts water, 10-20 parts glycerin, 5-10 parts jojoba seed oil, 1-4 parts shea butter, 1-5 parts caprylic / capric triglyceride, 1-2 parts polydimethylsiloxane, 1-5 parts palmitoyl tetrapeptide-5, and 1-5 parts acetyl... Hexapeptide-8, 10-15 parts propylene glycol, 1-3 parts sorbitan stearate, 1-2 parts sucrose cocoate, 1-2 parts beeswax, 1-2 parts cetearyl alcohol, 1-3 parts tocopheryl acetate, 1-4 parts phytosterol / octyldodecyl lauroyl glutamate, 1-2 parts betaine, 1-2 parts niacinamide, 1-2 parts carbomer, 1-3 parts triethanolamine, 5-10 parts phenoxyethanol, 1-3 parts methylparaben, 1-4 parts propylparaben, 1-3 parts allantoin, 1-2 parts sodium hyaluronate. When applied to human skin, it effectively prevents roughness and dryness, inhibits melanin production, and leaves skin feeling moisturized.

[0005] This document, published in China (CN113876597A) on January 4, 2022, discloses a moisturizing cream and its preparation method. The moisturizing cream is made by emulsifying the following ingredients: Component A: shea butter, polydimethylsiloxane, cyclopentamethoxysiloxane / polydimethylsiloxane / vinyldimethylsiloxane crosspolymer, isochoric hexadecane, isononyl isononanoate, emulsifier, thickener, and antioxidant; Component B: 3-O-ethyl ascorbic acid ether, glycerin, retinol, sodium hyaluronate, preservative, and water; Component C: propylene glycol, thickener, emulsifier, and water; Component D: butylene glycol, pH adjuster, thickener, antioxidant, preservative, fragrance, and water. The moisturizing cream is easily absorbed through the stratum corneum of the skin, provides long-lasting moisturizing effects, and has a light, refreshing, and non-greasy texture.

[0006] Relevant non-patent literature retrieved: The journal title is *China Cosmetics*, the article title is "Application of Shea Butter in Cosmetics", Volume 3, Publication Date: October 18, 2007. This article discloses the formulation of shea butter for various cosmetics: Skin care products: 3%-15%, suitable for anti-aging products, night creams, care products for sensitive and dry skin, winter products, moisturizing creams, foot creams, body lotions, baby products, and aftershave products; Sunscreen products: 3%-25%, suitable for sunscreen products and after-sun repair products; Makeup products: 2%-10%, suitable for lipsticks and foundations; Hair products: 1%-3%, suitable for nourishing shampoos and conditioners for dry hair, and post-dyeing hair care products.

[0007] The prior art represented by the aforementioned documents has at least the following unresolved technical problems or defects: The ointment has insufficient oil resistance and drying properties. The relevant evidence is: Patent document CN113876597A (Comparative Example 1 of this application) shows that the ointment surface has obvious oily luster, the system has weak oil-locking ability, and oil migration and precipitation are likely to occur during storage. Long-term storage will further lead to oil leakage from the nozzle and oil-water separation problems, and the product has poor shelf appearance stability.

[0008] The product suffers from a deficiency in balancing skin feel and efficacy, failing to balance moisturizing effect with a refreshing feel. Insufficient moisturizing power is accompanied by stickiness, difficulty in spreading, and slow absorption. Relevant evidence is provided by patent document CN113876597A (Comparative Example 1 of this application). According to the test results in the following text, Comparative Example 1 shows a significant difference in refreshing index. After application, a sticky oil film remains on the skin, resulting in a strong oily feeling and a heavy, suffocating sensation. The hardness and viscosity dimensions are also poor, with the cream being too soft and greasy. It lacks both suitable support and shaping ability and the ability to form a thin, breathable protective film, resulting in a heavy and sticky feel on the skin.

[0009] Most highly moisturizing hand creams on the market contain a lot of oil, resulting in a heavy feel and a sticky sensation after use. While lightweight hand creams offer better moisturizing effects, their high oil content fails to address both of these issues effectively. Therefore, researching the main contradictions between moisturizing properties and user experience in hand care products is crucial to better meet the needs of consumers.

[0010] In solving the above problems or overcoming the above defects, the present invention encountered the following difficulties and obstacles: 1. Formulas with high shea butter content are difficult to emulsify, and their storage stability after emulsification faces challenges.

[0011] 2. High-oil formulas tend to feel sticky when applied.

[0012] This invention addresses the aforementioned problems through the design and screening of formulations, providing a stable, moisturizing yet non-greasy high-shea butter cream. Summary of the Invention

[0013] The purpose of this invention is to provide: A product that improves skin condition, and related technologies to address technical issues such as reducing oiliness, minimizing moisture loss, and enhancing stability, or combinations thereof.

[0014] Terminology Explanation: Unless otherwise defined, all technical terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this subject matter pertains. Unless otherwise stated, all patents, patent inventions, and disclosures cited throughout this document are incorporated herein by reference in their entirety. Where multiple definitions exist for terms herein, the definitions provided in this chapter shall prevail.

[0015] It should be understood that the above brief description and the following detailed description are exemplary and for illustrative purposes only, and do not limit the subject matter of the invention in any way. In this invention, the singular is used in conjunction with the plural unless otherwise specifically stated. It should also be noted that, unless otherwise stated, the use of “or” or “or” means “and / or”. Furthermore, the use of the term “comprising” and other forms such as “including,” “containing,” and “contains” are not limiting.

[0016] Definitions of standard chemical terms can be found in the references "Dictionary of Cosmetic Raw Materials" and "Cosmetic Professional English".

[0017] Unless otherwise stated, conventional methods within the scope of the art, such as emulsification index (EAI) testing, emulsification stability (ESI) testing, particle size analysis, polydispersity index testing, and zeta potential testing, shall be used.

[0018] Unless specifically defined herein, the use of all commercially available products herein employs standard techniques. For example, it may be carried out using the manufacturer's instructions for use with the kit, or in accordance with methods known in the art or the description of this invention. The techniques and methods described herein can generally be implemented according to conventional methods well known in the art, based on the descriptions in the various summary and more specific documents cited and discussed in this specification.

[0019] The “range” disclosed in this document takes the form of a lower limit and an upper limit. It can be one or more lower limits and one or more upper limits, respectively. A given range is defined by selecting a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular range. All ranges that can be defined in this way are inclusive and composable; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a specific parameter, it is also expected that ranges of 60-110 and 80-120 are also expected. Furthermore, if the minimum range values ​​are listed as 1 and 2, and if the maximum ranges are listed as 3, 4, and 5, then the following ranges are all expected: 1-2, 1-4, 1-5, 2-3, 2-4, and 2-5.

[0020] In this invention, unless otherwise specified, the numerical range "ab" represents a shortened representation of any combination of real numbers from a to b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" have been listed in this document, and "0-5" is simply a shortened representation of these numerical combinations.

[0021] The terms “optional / arbitrary” or “optionally / arbitrarily” mean that the event or situation described below may or may not occur, including both the occurrence and non-occurrence of the event or situation.

[0022] The terms used in this article are "shea butter, avocado tree ( BUTYROSPERMUM PARKII "Shea butter" refers to natural plant lipids extracted from the fruit of the avocado tree. It is rich in fatty acids, triglycerides, and plant active ingredients, and is used as an oily raw material in hand creams to moisturize, soften, and repair the skin.

[0023] The term "triglycerides" used in this article refers to ester compounds formed by the esterification of one molecule of glycerol with three molecules of fatty acids. They are the core components of animal and plant oils and can play a role in moisturizing, locking in moisture, and softening the skin in formulas.

[0024] The term "oils" used in this article refers to hydrophobic lipid raw materials that can be liquid, semi-solid, or solid at room temperature, including natural animal and plant oils, synthetic esters, hydrocarbon oils, etc. They are the basic moisturizing components of hand creams and have the functions of lubrication, moisturizing, and isolating external irritants.

[0025] The term "semi-solid grease" used in this article refers to grease-based raw materials with a texture between liquid oil and solid grease at room temperature (25℃), which have plasticity, fluidity and formability, and can adjust the consistency and feel of the paste, and improve the smoothness of product application.

[0026] The term "solid oils" used in this article refers to lipid raw materials that are solid at room temperature (25℃), have a relatively high melting point, and are mainly used to adjust the hardness, formability, and stability of hand cream, while enhancing the sealing and moisturizing effect.

[0027] The terms “emulsifier” and “emulsion system” used in this article refer to: an emulsifier being a type of surface-active substance with both hydrophilic and lipophilic structures, which can reduce the interfacial tension between oil and water phases; and an emulsion system being a combination system formed by compounding one or more emulsifiers, which can uniformly disperse the immiscible oil and water phases in the formulation to form a stable emulsion.

[0028] The term "thickening system" used in this article refers to a combination system composed of one or more thickening and rheology modifiers, used to increase the viscosity of hand cream, improve the cream's texture, enhance its physical stability, and optimize the product's application feel.

[0029] The term “polyglycerol-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua softMB)” as used in this article refers to a compound daily chemical raw material, whose main components are a mixture of glycerol cocoate, hydrolyzed rice bran extract and hydrogenated rice bran wax. It is marketed as Aqua soft MB and is used in hand creams as a moisturizer, emollient and skin feel modifier.

[0030] The term "cetearearyl alcohol" used in this article refers to a high-grade fatty alcohol composed of cetyl alcohol and stearyl alcohol. It is a commonly used emulsifier, thickener, and stabilizer in daily chemical products. It can assist in emulsification, adjust the consistency of the paste, and improve the texture of the product and the stability of the system.

[0031] The term "isononyl isononanoate" used in this article refers to a synthetic ester oil obtained by esterification of isononanoic acid and isononyl alcohol. It has a refreshing feel, good spreadability, and is a light moisturizing oil that can give hand cream a smooth and non-sticky user experience.

[0032] The term "tocopherol acetate" used in this article refers to an acetate derivative of vitamin E, which has antioxidant, moisturizing, and skin-repairing effects. It can inhibit the oxidation and deterioration of oils, while soothing the skin on the hands and enhancing the skincare effect.

[0033] The term "AVC" used in this article refers to ammonium acryloyl dimethyl taurate / VP copolymer, a commonly used high molecular weight thickener and stabilizer in cosmetics. It has high thickening efficiency, good salt resistance, and can adjust the rheological properties of creams, thereby improving the stability and skin feel of cream systems.

[0034] The term "sodium hyaluronate" used in this article refers to the sodium salt form of hyaluronic acid, a water-soluble high-molecular-weight moisturizing ingredient with excellent water absorption and retention capabilities, which can deeply moisturize the skin on the hands and improve dry skin.

[0035] The term "ethylhexylglycerin" used in this article refers to polyol functional raw materials, which are often used as preservative synergists and antibacterial agents. They can synergistically enhance the preservative ability of the system, while also having a certain moisturizing effect.

[0036] The term "mixing" as used in this article refers to the process of uniformly blending two or more raw materials in a formula through conventional methods such as stirring and dispersion, so that the components are initially mixed.

[0037] The term "emulsification" as used in this article refers to the process in which, under the action of an emulsifier and through external forces such as stirring, oil-phase raw materials are uniformly dispersed in the form of tiny droplets in aqueous raw materials to form a stable emulsion system.

[0038] The term "homogenization" as used in this article refers to the process of using homogenizing equipment to generate strong shearing, impact, and turbulence to finely break down and disperse mixed / emulsified materials, further reducing the particle size of internal phase droplets and improving the fineness, uniformity, and long-term stability of the paste.

[0039] In a first aspect, the present invention provides: a product with the effect of improving skin condition, the raw materials of which include: an oil system, an emulsification system, a thickening system, water and excipients.

[0040] The oil system includes semi-solid oils and liquid oils; Preferably, the semi-solid oil is shea butter; More preferably, the semi-solid oil in the product is 10%-20% by mass, for example, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, or any range derived thereof; More preferably, the semi-solid oil in the product accounts for 20% by mass.

[0041] Preferably, the liquid oil is selected from at least one of camellia seed oil, C12-15 benzoate (high polarity), isononyl isononanoate, cetyl ethylhexanoate, caprylic / capric triglyceride (GTCC), polydimethylsiloxane, CCCMB coconut oil alcohol-caprylic / capric ester and hemisqualane; More preferably, the liquid grease is selected from at least one of isononyl isononanoate, octanoic / capric triglyceride (GTCC), and polydimethylsiloxane; More preferably, the liquid grease is a compound of isononyl isononanoate, octanoic acid / capric acid triglyceride (GTCC), and polydimethylsiloxane; Specifically, the liquid grease is a compound of isononyl isononanoate, octanoic acid / capric acid triglyceride (GTCC), and polydimethylsiloxane in a mass ratio of 5:3:1.

[0042] The emulsification system is selected from at least one of glyceryl stearate / PEG-100 stearate (A165), polyglyceryl-10 stearate, polyglyceryl-6 stearate, glyceryl stearate / cetearearyl alcohol / sodium stearoyl lactylate, sucrose polystearate / cetearearyl alcohol / olea europaea, glyceryl stearate citrate, polyglyceryl-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua soft MB), 22MB, and cetearyl alcohol glucoside; Preferably, the emulsification system is selected from at least one of glyceryl stearate / cetearearyl alcohol / sodium stearoyl lactylate, sucrose polystearate / cetearearyl alcohol / olea europaea, glyceryl stearate citrate, polyglyceryl-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua soft MB); More preferably, the emulsification system is a compound of glyceryl stearate citrate and polyglycerol-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua soft MB); More preferably, the emulsification system is a compound of glyceryl stearate citrate and polyglycerol-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua soft MB) in a mass ratio of 1:1.

[0043] The thickening system includes at least one of cetearyl alcohol, polyacrylate crosspolymer-6 (ZEN), hydroxyethyl acrylate / sodium acryloyl dimethyl taurate copolymer (EMT10), and ammonium acryloyl dimethyl taurate / VP copolymer (AVC). Preferably, the thickening system is a combination of cetearyl alcohol and AVC; More preferably, the thickening system is a mixture of cetearyl alcohol and AVC in a mass ratio of 1-6:1; More preferably, the thickening system is a mixture of cetearyl alcohol and AVC in a mass ratio of 2:1.

[0044] The product contains a thickening system at a mass percentage of 1%-4%, for example, 1%, 2%, 3%, 4%, or any range derived thereof; Preferably, the product contains 1.5% by mass of the thickening system.

[0045] The excipients include at least one of the following: antioxidants, preservatives, pH adjusters, and humectants. Preferably, the antioxidant is selected from at least one of the following: tocopheryl acetate, rosemary extract, green tea extract, and grape seed oil; More preferably, the antioxidant is tocopherol acetate.

[0046] Preferably, the preservative is selected from at least one of phenoxyethanol, ethylhexylglycerin, potassium sorbate, sodium benzoate, and p-hydroxyacetophenone; More preferably, the preservative is a combination of phenoxyethanol and ethylhexylglycerin.

[0047] Preferably, the pH adjuster is selected from at least one of sodium hydroxide, potassium hydroxide, triethanolamine, citric acid, and sodium citrate; More preferably, the pH adjuster is sodium hydroxide; More preferably, the pH adjuster is sodium hydroxide with a mass fraction of 10%.

[0048] Preferably, the moisturizer is selected from at least one of glycerin, sodium hyaluronate, propylene glycol, 1,3-propanediol, and sorbitol; More preferably, the moisturizer is selected from a combination of glycerin and sodium hyaluronate.

[0049] In some specific embodiments, the product ingredients include: polyglycerol-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax, shea butter, isononyl isononanoate, cetearyl alcohol, AVC, tocopheryl acetate, phenoxyethanol, ethylhexylglycerin, 10% sodium hydroxide, glycerin, sodium hyaluronate, and water.

[0050] In some other specific embodiments, the product ingredients include: polyglycerol-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax, glyceryl stearate citrate, shea butter, isononyl isononanoate, GTCC, dimethicone, cetearyl alcohol, AVC, tocopheryl acetate, phenoxyethanol, ethylhexylglycerin, glycerin, sodium hyaluronate, and water.

[0051] In some specific embodiments, the raw materials of the product, by mass fraction, include the following components: Semi-solid fats and oils, 10%-25%, such as 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%, 25%, or any range derived thereof; Liquid oils and fats 5%-15%, for example 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, or any range derived thereof; The emulsion system is 3%-8%, for example, 3%, 4%, 5%, 6%, 7%, 8%, or any range derived therefrom; Thickening system 1%-4%, for example 1%, 2%, 3%, 4%, or any range derived therefrom; Antioxidant 0.1%-1.0%, for example 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, or any range derived thereof; Preservatives 0.1%-1.0%, such as 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, or any range derived thereof; pH adjusters 0%-1.0%, such as 0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, or any range derived thereof; Moisturizer 7.5%-15%, such as 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, 12.5%, 13%, 13.5%, 14%, 14.5%, 15%, or any range derived thereof; The remainder is water.

[0052] Preferably, the raw materials of the product, by mass fraction, include the following components: 20% semi-solid oil; 12% liquid oil; 5% emulsification system; 1.5% thickening system; 0.5% antioxidant; 0.6% preservative; 0.25% pH adjuster; 10.5% humectant; and the balance being water.

[0053] In another specific embodiment, the raw materials of the product, by mass fraction, include the following components: 20% semi-solid oils; 9% liquid oils; 4% emulsification system; 1.5% thickening system; 0.5% antioxidant; 0.6% preservative; 10.5% humectant; and the balance being water.

[0054] Based on further solutions to the technical problems of the present invention, or simultaneous solutions to multiple technical problems, the preferred solution in the technical solution provided in the first aspect of the present invention includes: The first preferred embodiment: the emulsifying system is selected from at least one of glyceryl stearate / PEG-100 stearate (A165), polyglyceryl-10 stearate, polyglyceryl-6 stearate, glyceryl stearate / cetearyl alcohol / sodium stearoyl lactylate, sucrose polystearate / cetearyl alcohol / olive (OLEA EUROPAEA), glyceryl stearate citrate, polyglyceryl-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua soft MB), 22MB, and cetearyl alcohol glucoside; preferably, the emulsifying system is selected from at least one of glyceryl stearate / cetearyl alcohol / sodium stearoyl lactylate, sucrose polystearate / cetearyl alcohol / olive (OLEA EUROPAEA), glyceryl stearate citrate, polyglyceryl-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua soft MB), 22MB, and cetearyl alcohol glucoside. At least one of the following: glyceryl stearate citrate and polyglycerol-3-cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua softMB); more preferably, the emulsification system is a blend of glyceryl stearate citrate and polyglycerol-3-cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua softMB) in a mass ratio of 1:1. This technical solution, while addressing the technical problems of "reducing greasiness and improving stability," further solves the technical problem of "reducing water loss."

[0055] The second preferred embodiment: the liquid oil is selected from at least one of camellia seed oil, C12-15 benzoate (high polarity), isononyl isononanoate, cetyl ethylhexanoate, octanoic / decanoic triglyceride (GTCC), polydimethylsiloxane, CCCMB coconut oil alcohol-octanoate / decanoate, and hemisqualane; more preferably, the liquid oil is selected from at least one of isonononyl isononanoate, octanoic / decanoic triglyceride (GTCC), and polydimethylsiloxane; even more preferably, the liquid oil is a compound of isonononyl isononanoate, octanoic / decanoic triglyceride (GTCC), and polydimethylsiloxane; specifically, the liquid oil is a compound of isonononyl isononanoate, octanoic / decanoic triglyceride (GTCC), and polydimethylsiloxane in a mass ratio of 5:3:1. This technical solution, while solving the technical problem of "reducing greasiness and improving stability", further solves the technical problem of "reducing water loss".

[0056] Secondly, the present invention provides a method for preparing the product, comprising the steps of: (1) Preparation of oil phase: The oil system, emulsion system and thickening system are mixed and heated to obtain the oil phase; (2) Preparation of aqueous phase: The humectant is dissolved in water and then heated to obtain the aqueous phase; (3) Emulsification: The oil phase obtained in step (1) and the aqueous phase obtained in step (2) are mixed and then emulsified and homogenized to obtain the precursor product; (4) Cooling: The precursor product obtained in step (3) is cooled and then mixed with antioxidants and preservatives to obtain the product.

[0057] Wherein, the heating temperature described in steps (1) and (2) is 80-85℃, for example 80℃, 81℃, 82℃, 83℃, 84℃, 85℃, or any range derived thereof; In some specific implementations, step (2) also includes adding a pH adjuster.

[0058] In step (3), the mixing method is to slowly add the oil phase obtained in step (1) to the water phase obtained in step (2).

[0059] The emulsification temperature in step (3) is 70-85℃, for example 70℃, 71℃, 72℃, 73℃, 74℃, 75℃, 76℃, 77℃, 78℃, 79℃, 80℃, 81℃, 82℃, 83℃, 84℃, 85℃, or any range derived therefrom; Preferably, the emulsification temperature in step (3) is 80°C.

[0060] The homogenization rate in step (3) is 4500-7500 r / min, for example: 4500 r / min, 4600 r / min, 4700 r / min, 4800 r / min, 4900 r / min, 5000 r / min, 5100 r / min, 5200 r / min, 5300 r / min, 5400 r / min, 5500 r / min, 5600 r / min, 5700 r / min, 5800 r / min, 5900 r / min. 0 r / min, 6000 r / min, 6100 r / min, 6200 r / min, 6300 r / min, 6400 r / min, 6500 r / min, 6600 r / min, 6700 r / min, 6800 r / min, 6900 r / min, 7000 r / min, 7100 r / min, 7200 r / min, 7300 r / min, 7400 r / min, 7500 r / min, or any range derived thereof; Preferably, the homogenization rate in step (3) is 5600 r / min.

[0061] The homogenization time in step (3) is 3-10 min, for example 3 min, 4 min, 5 min, 6 min, 7 min, 8 min, 9 min, 10 min, or any range derived therefrom; Preferably, the homogenization time in step (3) is 4-5 minutes.

[0062] The temperature for cooling in step (4) is 20-25℃, for example 20℃, 21℃, 22℃, 23℃, 24℃, 25℃, or any range derived therefrom.

[0063] Thirdly, the present invention provides the application of the product in improving skin condition.

[0064] The skin includes the face and various parts of the body; Specifically, the skin includes, but is not limited to, facial skin, hand skin, neck skin, arm skin, and elbow and knee skin.

[0065] The improvement of skin condition includes, but is not limited to: improving dry skin, improving rough skin, reducing fine lines, improving itchy skin, repairing the skin barrier, and improving dull skin.

[0066] In some specific implementations, the improvement in skin condition includes improving itching in dry, sensitive skin.

[0067] The application involves utilizing an optimized emulsification and thickening system to ensure uniform dispersion of all product components, resulting in a fine and stable paste that is easy to apply and spread, allowing the active ingredients to act evenly on the skin. This product effectively improves dry, flaky, rough skin on the hands, increased fine lines, damaged skin barrier, and dull skin tone. It is suitable for daily hand care for all types of people, and continued use can maintain healthy, hydrated, and supple skin.

[0068] "The emulsifying system is selected from at least one of the following: glyceryl stearate / PEG-100 stearate (A165), polyglyceryl-10 stearate, polyglyceryl-6 stearate, glyceryl stearate / cetearyl alcohol / sodium stearoyl lactylate, sucrose polystearate / cetearyl alcohol / olive oil (OLEA EUROPAEA), glyceryl stearate citrate, polyglyceryl-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua soft MB), 22MB, and cetearyl alcohol glucoside," as summarized in the foregoing explanation and / or Example 1's "emulsifying system: Aqua soft MB 5%", Example 7's "glyceryl stearate / cetearyl alcohol / sodium stearoyl lactylate 3%, sucrose polystearate / cetearyl alcohol / olive oil (OLEA EUROPAEA) 2%", and Example 8's "liquid oil system is isononyl isononanoate 5%, GTCC 3%", etc. Therefore, those skilled in the art can reasonably presume that "the emulsifying system is selected from at least one of glyceryl stearate / PEG-100 stearate (A165), polyglyceryl-10 stearate, polyglyceryl-6 stearate, glyceryl stearate / cetearearyl alcohol / sodium stearoyl lactylate, sucrose polystearate / cetearearyl alcohol / olea europaea, glyceryl stearate citrate, polyglyceryl-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax (Aqua soft MB), 22MB and cetearyl alcohol glucoside", its subordinate concepts, its essentially equivalent technical means, and technical means that can replace it within the scope of conventional technical means and common knowledge based on the existing level of technology should all fall within the protection scope of this invention.

[0069] The term "application in improving skin condition" is summarized by the technical features described in the foregoing explanation and / or embodiments, including: "the skin includes, but is not limited to, facial skin, hand skin, neck skin, arm skin, and elbow and knee skin"; "the improvement in skin condition includes, but is not limited to: improving dry skin, improving rough skin, reducing fine lines, improving itchy skin, repairing the skin barrier, and improving dull skin"; and "the application is: relying on an optimized emulsification and thickening system, the product's components are evenly dispersed, the cream is delicate and stable, easy to apply and spread, and the active ingredients can act evenly on the skin. This product can effectively improve the dry, peeling, rough, and fine-lined skin of the hands, as well as the damaged skin barrier and dull skin tone. It is suitable for daily hand care for all types of people, and continuous use can maintain a healthy, moist, and supple skin condition." Therefore, those skilled in the art can reasonably presume that "application in improving skin condition," its subordinate concepts, its essentially equivalent technical means, and technical means that can replace it within the scope of conventional and common knowledge based on the existing level of technology should all fall within the protection scope of this invention.

[0070] The beneficial effects of this invention are as follows: The present invention has at least the following beneficial effects: (1) Excellent system stability: The present invention optimizes the proportion of oil, emulsifier and thickener components, and is suitable for high content semi-solid shea butter system. The compatibility of each raw material component is excellent, and the finished product paste is uniform and delicate. No particles, layering or clumping will occur during production and storage. The finished product yield is high and the storage stability is excellent.

[0071] (2) Breaking through the limitations of high oil content: Breaking the shortcoming of traditional high-addition shea butter products that are always sticky when moisturizing, relying on the synergistic effect of light liquid oil, organic silicone skin feel regulator and complex emulsification system, neutralizing the heavy oiliness of shea butter, the product has sufficient moisturizing power, while being smooth and easy to spread, with good extensibility, fast film formation and absorption, no floating oil after use, low stickiness, suitable for all seasons and all skin types.

[0072] (3) Outstanding moisturizing and repairing effects: Relying on the high content of shea butter lipids to lock in water, combined with multiple moisturizing components, it can quickly increase the immediate water content of the skin on the hands, lock in the moisture of the stratum corneum for a long time, improve the dryness, roughness and peeling of the hands, repair the damaged skin barrier of the hands, and significantly improve the moisturizing and repairing performance.

[0073] (4) Compared with the prior art, the present invention has better technical effects in terms of paste state and sensory evaluation.

[0074] According to experimental tests, the present invention improves the ointment condition score from 75 in the prior art to over 84.

[0075] According to experimental tests, the present invention reduces the hardness viscosity in sensory evaluation from 8 in the prior art to below 7.

[0076] Furthermore, based on the present invention: 1. Based on the comparison of Examples 1-10 and Comparative Examples 2-5, the present invention employs a combination of technical means such as "isononyl isononanoate," "shea butter," and "cetearearyl alcohol" to achieve new technical effects, improving the paste's consistency and reducing its stickiness. The combined technical effect is superior to the sum of the effects of each individual technical means. Attached Figure Description

[0077] Figure 1 This is a radar chart of sensory evaluation from Example 1.

[0078] Figure 2 This is a radar chart of sensory evaluation in Example 2.

[0079] Figure 3 This is a radar chart of sensory evaluation in Example 3.

[0080] Figure 4 This is a radar chart of sensory evaluation in Example 4.

[0081] Figure 5 This is a radar chart of sensory evaluation from Example 5.

[0082] Figure 6 This is a radar chart of sensory evaluation from Example 6.

[0083] Figure 7 This is a radar chart of sensory evaluation from Example 7.

[0084] Figure 8 This is a radar chart of sensory evaluation from Example 8.

[0085] Figure 9 This is a radar chart of sensory evaluation from Example 9.

[0086] Figure 10 This is a radar chart of sensory evaluation from Example 10.

[0087] Figure 11 The radar chart shows the sensory evaluation of Comparative Example 1.

[0088] Figure 12 The radar chart shows the sensory evaluation of Comparative Example 5. Detailed Implementation

[0089] The following non-limiting embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of the present invention, but do not limit the invention in any way. The following content is merely an exemplary description of the scope of protection claimed by the present invention, and those skilled in the art can make various changes and modifications to the present invention based on the disclosed content, and such changes should also fall within the scope of protection claimed by the present invention.

[0090] The present invention will be further described below by way of specific embodiments. Unless otherwise specified, all instruments, devices, equipment, reagents, products, etc., used in the embodiments of the present invention are obtained through conventional commercial means.

[0091] Specific raw material information is shown in Table 1: Table 1. Raw Material Information

[0092] Example 1 A product with skin-improving effects, the ingredients of which, by weight fraction, include: Semi-solid oils: Shea butter 15%; Liquid oils: Isononyl isononanoate 12%; Emulsifying system: Aqua soft MB 5%; Thickening system: Cetearyl alcohol 1.0%, AVC 0.5%; Antioxidant: Tocopheryl acetate 0.5%; Preservative (phenoxyethanol and ethylhexylglycerin in combination) 0.6%; pH adjuster: 10% sodium hydroxide 0.25%; Humectant (glycerin and sodium hyaluronate in combination) 10.5%; Balance: water.

[0093] A method for preparing a product with skin-improving effects, comprising the following steps: (1) Preparation of oil phase Accurately weigh shea butter, isononyl isononanoate, Aqua soft MB, and cetearyl alcohol and add them to an oil phase beaker. Place the beaker in a constant temperature water bath at 80-85℃ and heat while continuously stirring until all ingredients are completely melted and mixed evenly to form a transparent and homogeneous oil phase system.

[0094] (2) Aqueous phase preparation Accurately weigh deionized water, AVC, glycerin, and sodium hyaluronate, add them to an aqueous phase beaker, place the beaker in an 80-85℃ constant temperature water bath and heat until completely dissolved, then keep warm for later use.

[0095] (3) Emulsification and homogenization Keep the oil and water phase temperatures stable at around 80°C. While stirring at 5600 r / min, slowly add the oil phase to the water phase. After addition, continue homogenizing at 5600 r / min for 4-5 minutes to ensure the emulsion system is fully dispersed and forms a stable emulsion.

[0096] (4) Cooling The emulsion was continuously cooled to room temperature, and tocopheryl acetate, phenoxyethanol, and ethylhexylglycerin were added and stirred. After cooling for 15 minutes, the emulsion was obtained.

[0097] Example 2 Compared with Example 1, the only difference is that "15% shea butter" in the raw materials is replaced with "10% shea butter", and "1.0% cetearyl alcohol" in the raw materials is replaced with "3.0% cetearyl alcohol". All other conditions are basically the same as in Example 1.

[0098] Example 3 Compared with Example 1, the only difference is that "15% shea butter" in the raw materials is replaced with "20% shea butter", and "1.0% cetearyl alcohol" in the raw materials is replaced with "2.0% cetearyl alcohol". All other conditions are basically the same as in Example 1.

[0099] Example 4 Compared with Example 1, the only difference is that “AVC” in the raw materials is replaced with “ZEN”, “isononyl isononanoate” is replaced with “cetyl ethylhexanoate”, and “Aqua soft MB” is replaced with “glyceryl stearate / PEG-100 stearate (A165)”. All other conditions are basically the same as in Example 1.

[0100] Example 5 Compared with Example 1, the only difference is that “AVC” in the raw materials is replaced with “EMT10”, “isononyl isononanoate” is replaced with “CCCMB coconut oil alcohol-caprylate / decanoate”, and “Aqua soft MB” is replaced with “polyglycerol-10 stearate”. All other conditions are basically the same as in Example 1.

[0101] Example 6 Compared with Example 1, the only difference is that "isononyl isononanoate" is replaced with "camellia seed oil" and "Aquasoft MB" is replaced with "22MB". All other conditions are basically the same as in Example 1.

[0102] Example 7 Compared with Example 1, the only difference is that the mass fraction of shea butter is 20%, the liquid oil system is 5% isononyl isononanoate and 3% GTCC; the emulsification system is 3% glyceryl stearate / cetearearyl alcohol / sodium stearoyl lactylate and 2% sucrose polystearate / cetearearyl alcohol / olea europaea oil; and there is no pH adjuster. All other conditions are basically the same as in Example 1.

[0103] Example 8 Compared with Example 1, the only difference is that the mass fraction of shea butter is 20%, the liquid oil system is 5% isononyl isononanoate and 3% GTCC; the emulsification system is 2.5% Aqua soft MB and 2.5% glyceryl stearate citrate; and there is no pH adjuster. All other conditions are basically the same as in Example 1.

[0104] Example 9 Compared with Example 1, the only difference is that the mass fraction of shea butter is 20%, the liquid oil system is 5% isononyl isononanoate and 3% GTCC; the emulsification system is 2% Aqua soft MB and 2% glyceryl stearate citrate; and there is no pH adjuster. All other conditions are basically the same as in Example 1.

[0105] Example 10 Compared with Example 1, the only difference is that the mass fraction of shea butter is 20%, the liquid oil system is 5% isononyl isononanoate, 3% GTCC, and 1% polydimethylsiloxane; the emulsification system is 2% Aqua soft MB and 2% glyceryl stearate citrate; and there is no pH adjuster. All other conditions are basically the same as in Example 1.

[0106] Comparative Example 1 The product was prepared according to the preparation method described in Example 3 of patent document CN113876597A.

[0107] Comparative Example 2 Compared with Example 1, the only difference is that "AVC" in the raw materials is replaced with "Carbopol U20", and the other conditions are basically the same as those in Example 1.

[0108] Comparative Example 3 Compared with Example 1, the only difference is that "Aqua soft MB" in the raw materials is replaced with "polyglycerol-3-methylglucose distearate (CARE 450)", and the other conditions are basically the same as in Example 1.

[0109] Comparative Example 4 Compared with Example 1, the only difference is that "Aqua soft MB" in the raw materials is replaced with "polyglycerol-3 distearate / polyglycerol-6 behenate (NC MB)", and the other conditions are basically the same as in Example 1.

[0110] Comparative Example 5 Compared with Example 1, the only difference is that “1.0% cetearyl alcohol” in the raw materials is replaced with “4.0% cetearyl alcohol”, and the other conditions are basically the same as those in Example 1.

[0111] Observation of Product in Test Example 1 Observe the appearance of the hand cream sample, record whether the cream is uniform and smooth, whether there are particles, layering, lumps, etc., and evaluate the stability of the sample.

[0112] The evaluation criteria are as follows: Table 2

[0113] The scoring results are as follows: Table 3

[0114] Sensory evaluation of test case 2 The product's refreshing feel, smoothness, spreadability, absorption speed, hardness, viscosity, and moisturizing properties were evaluated through user feedback from 15 volunteers in Examples 1-10, Comparative Example 1, and Comparative Example 5. The evaluation results are as follows: Figure 1-12 As shown: As can be seen from the sensory evaluation radar chart, the moisturizing and refreshing sensations of samples 1 and 5 were relatively low, while the high-content shea butter cream provided by the present invention provides excellent moisturizing while maintaining a refreshing sensation. It is smooth to apply, has good spreadability, absorbs quickly, and has low stickiness.

[0115] Example 3: Moisture Content Test The optimal Example 10 was selected for efficacy testing. A Delfin medical moisture content analyzer was used to measure the moisture content of the samples after 30 minutes, 90 minutes, and 7 days of use by volunteers. The results are as follows: Table 4

[0116] As can be seen from the above, the high shea butter cream provided by the present invention can significantly increase the skin's moisture content and has excellent moisturizing and repairing effects.

[0117] Verification of technical effectiveness and / or analysis of technical problem solving Stability verification of the formula: Based on the evaluation of appearance and storage properties, the high-content shea butter hand cream prepared by this invention has a uniform and delicate texture with no visible particles. After long-term standing, there is no oil-water separation or lumps. The formula has excellent compatibility stability, and the appearance quality of the finished product is better than that of the control group samples.

[0118] Skin feel performance verification: The control group (Comparative Example 1 and Comparative Example 5) samples showed weak skin moisturizing and enhancement, poor refreshing feel after use, and overall poor user experience. Compared with the control group samples, the high-content shea butter hand cream of this invention achieves dual performance optimization. With high addition of shea butter and long-lasting moisturizing effect, it also has excellent refreshing feel, high smoothness and excellent spreadability, and rapid penetration and absorption after contact with the skin. The sticky feeling on the skin surface is greatly reduced, perfectly balancing high oil moisturizing effect and refreshing feel.

[0119] 3. Skin Care Efficacy Performance Verification: Skin moisture content testing verified that the hand cream prepared by this invention can significantly increase the moisture content of the epidermal skin of the hands, build a stable water-locking lipid film on the skin surface, reduce transepidermal water loss, and has excellent long-lasting moisturizing and damaged skin repair effects. Its skin care efficacy is far superior to that of conventional control group formula products.

[0120] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A product that improves skin condition, characterized in that, The raw materials, by mass fraction, include the following components: 10%-25% semi-solid oils, 5%-15% liquid oils, 3%-8% emulsion system, 1%-4% thickening system, 0.1%-1.0% antioxidant, 0.1%-1.0% preservative, 0%-1.0% pH adjuster, 7.5%-15% humectant, and the balance being water.

2. The product according to claim 1, characterized in that, The semi-solid oil is shea butter; The liquid oil is selected from at least one of camellia seed oil, C12-15 benzoate, isononyl isononanoate, cetyl ethylhexanoate, caprylic / capric triglyceride, polydimethylsiloxane, CCCMB coconut oil-caprylic / capric ester and hemisqualane. The emulsification system is selected from at least one of the following: glyceryl stearate / PEG-100 stearate, polyglyceryl-10 stearate, polyglyceryl-6 stearate, glyceryl stearate / cetearyl alcohol / sodium stearoyl lactylate, sucrose polystearate / cetearyl alcohol / olive oil, glyceryl stearate citrate, polyglyceryl-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax, 22MB, and cetearyl alcohol glucoside; The thickening system includes at least one of cetearyl alcohol, polyacrylate crosspolymer-6, hydroxyethyl acrylate / sodium acryloyldimethyl taurate copolymer, and ammonium acryloyldimethyl taurate / VP copolymer; The antioxidant is selected from at least one of the following: tocopheryl acetate, rosemary extract, green tea extract, and grape seed oil; The preservative is selected from at least one of the following: phenoxyethanol, ethylhexylglycerin, potassium sorbate, sodium benzoate, and p-hydroxyacetophenone; The pH adjuster is selected from at least one of sodium hydroxide, potassium hydroxide, triethanolamine, citric acid, and sodium citrate; The moisturizer is selected from at least one of glycerin, sodium hyaluronate, propylene glycol, 1,3-propanediol, and sorbitol.

3. The product according to claim 2, characterized in that, The liquid grease is selected from at least one of isononyl isononanoate, caprylic / capric triglyceride, and polydimethylsiloxane. The emulsification system is selected from at least one of the following: glyceryl stearate / cetearyl alcohol / sodium stearoyl lactylate, sucrose polystearate / cetearyl alcohol / olive oil, glyceryl stearate citrate, polyglycerol-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax; The thickening system is a combination of cetearyl alcohol and AVC.

4. The product according to claim 3, characterized in that, The raw materials of the product include: polyglycerol-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax, shea butter, isononyl isononanoate, cetearyl alcohol, ammonium acryloyl dimethyl taurate / VP copolymer, tocopheryl acetate, phenoxyethanol, ethylhexylglycerin, sodium hydroxide, glycerin, sodium hyaluronate and water.

5. The product according to claim 3, characterized in that, The raw materials of the product include: polyglycerol-3 cocoate / hydrolyzed rice bran extract / hydrogenated rice bran wax, glyceryl stearate citrate, shea butter, isononyl isononanoate, caprylic / capric triglyceride, polydimethylsiloxane, cetearyl alcohol, ammonium acryloyl dimethyl taurate / VP copolymer, tocopheryl acetate, phenoxyethanol, ethylhexylglycerin, glycerin, sodium hyaluronate and water.

6. The product according to claim 1, characterized in that, The raw materials of the product, by mass fraction, include the following components: 20% semi-solid oils; 12% liquid oils; 5% emulsification system; 1.5% thickening system; 0.5% antioxidant; 0.6% preservative; 0.25% pH adjuster; 10.5% humectant; and the balance being water.

7. The product according to claim 1, characterized in that, The raw materials of the product, by mass fraction, include the following components: 20% semi-solid oils; 9% liquid oils; 4% emulsification system; 1.5% thickening system; 0.5% antioxidant; 0.6% preservative; 10.5% humectant; and the balance is water.

8. A method for preparing the product according to any one of claims 1-7, characterized in that, Including the following steps: (1) Preparation of oil phase: The oil system, emulsion system and thickening system are mixed and heated to obtain the oil phase; (2) Preparation of aqueous phase: The humectant is dissolved in water and then heated to obtain the aqueous phase; (3) Emulsification: The oil phase obtained in step (1) and the aqueous phase obtained in step (2) are mixed and then emulsified and homogenized to obtain the precursor product; (4) Cooling: The precursor product obtained in step (3) is cooled and then mixed with antioxidants and preservatives to obtain the product.

9. The preparation method according to claim 8, characterized in that, The heating temperature described in steps (1) and (2) is 80-85℃; Step (2) also includes adding a pH adjuster; The emulsification temperature in step (3) is 70-85℃; The homogenization rate in step (3) is 4500-7500 r / min, and the duration is 3-10 min; The temperature for cooling in step (4) is 20-25℃.

10. The use of the product according to any one of claims 1-7 in improving skin condition.

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