High-moisturizing cream and preparation method therefor

Abstract

The present disclosure provides a high-moisturizing cream and a preparation method therefor. Raw materials of the high-moisturizing cream comprise an emulsifier, an oil, a humectant, and a preservative. The humectant contains lactic acid and sodium lactate, and the humectant does not contain hyaluronic acid. The high-moisturizing cream provided by the present disclosure incorporates a composition of lactic acid and sodium lactate. Without the addition of hyaluronic acid, the high-moisturizing cream can effectively increase the water content of the stratum corneum of the skin and reduce the transepidermal water loss. Moreover, after the high-moisturizing cream provided by the present disclosure is prepared as either a W / O type or an O / W type, the moisturizing effect can be ensured.

Description

Highly moisturizing facial cream and preparation method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202311488183.1 filed with the Patent Office of China on November 8, 2023, entitled “A Highly Moisturizing Facial Cream and Its Preparation Method,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure belongs to the technical field of cosmetics, and particularly relates to a highly moisturizing facial cream and a preparation method thereof. Background Art

[0004] The fundamental elements of healthy skin are smoothness, plumpness, and elasticity. With aging, skin gradually becomes dry, wrinkled, and sagging, taking on an aged appearance. One of the pathological mechanisms contributing to this aging appearance is a gradual decrease in skin moisture. When the water content of the stratum corneum falls below 10%, the skin becomes dry and flaky, and cracks appear in the parallel, imbricated keratinocytes. This damages the skin barrier, making it susceptible to erosion by environmental factors such as wind, cold, and heat, as well as biological factors such as microorganisms. Water and electrolytes within the skin also evaporate or are easily lost. Therefore, maintaining skin moisture and safeguarding the barrier function of the stratum corneum are essential and fundamental measures for skin care and beauty.

[0005] The main function of moisturizing cream is to provide moisture and nutrients to the skin, helping to improve dryness and dehydration, and keeping the skin hydrated and healthy. Currently, the more recognized moisturizing methods are mainly divided into two aspects: one is to strengthen the control of water escape by enhancing the skin's epidermal barrier function and water-locking ability; the other is to increase the body's ability to supply water to epidermal cells by activating the expression of aquaporins in the skin's dermis. In addition, the proliferation activity of the skin cells themselves will affect the realization of the above functions. The most widely used moisturizers are glycerin and hyaluronic acid, and hyaluronic acid is considered to be the moisturizer with the strongest moisturizing ability. However, in recent years, consumers have become increasingly resistant to the smooth feeling of hyaluronic acid. This is mainly because products with added hyaluronic acid tend to form a false slippery feeling during application and have a sticky feeling after application. Therefore, it is extremely important to develop a moisturizing composition that is more skin-friendly and has a better moisturizing effect.

[0006] CN114081850A discloses a highly effective cosmetic moisturizer comprising the following ingredients: glycerol polyether-26, hyaluronic acid, sodium hyaluronate cross-polymer, and hydroxyethyl urea. The moisturizer produced by this method has simple ingredients, is easy to process and produce, and has a stable formula and is easy to store. It allows for deeper absorption into the skin where it is applied, thereby enhancing its moisturizing effect. It also allows for better integration when combined with other cosmetics, ensuring the moisturizing properties of the combined product, making it easier to apply and use.

[0007] CN107456409A discloses a moisturizing and skin-rejuvenating cosmetic comprising the following components by weight: 8-10% glycerin; 5-8% propylene glycol; 1-3% hyaluronic acid; 0.1-0.5% ascorbyl glucoside; 0.1-1% yeast extract; 1-2% oatmeal; 0.1-1% sodium gamma-polyglutamate; 2-4% beta-glucan; the balance being water. This method, by combining low-molecular-weight hyaluronic acid and ascorbyl glucoside, locks in moisture and prevents water loss, simultaneously locking in moisture and moisturizing. The beta-glucan forms a thin film on the skin surface, leaving it feeling moisturized and restoring damaged skin to a smooth, supple, and radiant state, achieving moisturizing and skin-rejuvenating effects.

[0008] CN104800096A discloses a high-efficiency moisturizing composition for use in cosmetics, which is composed of the following raw materials in percentage by weight: 1-10% glycerin, 1-10% butylene glycol, 1-10% betaine, 1-10% sodium L-lactate, 1-3% L-lactic acid, 0.5-3% saccharide isomers, 0.1-5% trehalose, 0.1-0.5% allantoin, 0.01-0.5% hyaluronic acid; the balance is water. This product can be applied to extremely dry skin, as well as damaged skin with chapped and peeling skin, providing long-lasting moisturizing effects. Continued use can restore skin's moisture and softness. The pH is weakly acidic (pH 4.2-5.0), which can soften the skin's stratum corneum, promote the shedding of aging and dehydrated stratum corneum cells, and maintain skin moisture. The main moisturizing ingredients are the original ingredients in normal human skin and do not contain irritating ingredients, making it suitable for normal and sensitive skin. The skin has no dependence on this product, and long-term use of this product will not have harmful effects on the skin.

[0009] The prior art discloses a series of moisturizing products, all of which require the addition of hyaluronic acid for moisturizing efficacy. Therefore, developing a highly moisturizing cream that can effectively increase the moisture content of the stratum corneum and reduce transepidermal water loss without adding hyaluronic acid is a research focus in this field.

[0010] Summary of the Invention

[0011] In view of the shortcomings of the prior art, the present invention aims to provide a highly moisturizing facial cream and a preparation method thereof, which has excellent moisturizing effect without adding hyaluronic acid.

[0012] To achieve this purpose, the present invention adopts the following technical solutions:

[0013] In a first aspect, the present disclosure provides a highly moisturizing facial cream, wherein the raw materials of the highly moisturizing facial cream include an emulsifier, oil, moisturizer, and preservative;

[0014] The moisturizing agent comprises lactic acid and sodium lactate;

[0015] The moisturizer does not contain hyaluronic acid.

[0016] The present invention discloses a composition of adding lactic acid and sodium lactate into a facial cream. Under a specific ratio, the composition has a high water-locking ability.

[0017] Preferably, the raw materials of the highly moisturizing facial cream include, by weight percentage, 0.1-6% of emulsifier (for example, 0.2%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 5.9%, etc.), 10-40% of oil (for example, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, etc.). 34%, 36%, 38%, etc.), moisturizer 15-40% (for example, it can be 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, etc.), preservative 0.1-6% (for example, it can be 0.2%, 0.4%, 0.6%, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, etc.).

[0018] Preferably, the total amount of lactic acid and sodium lactate accounts for 10-20% of the highly moisturizing facial cream, for example, it can be 12%, 14%, 16%, 18%, 19%, etc.

[0019] Preferably, the mass ratio of lactic acid to sodium lactate is 1:(5-30), for example, it can be 1:6, 1:8, 1:10, 1:12, 1:14, 1:16, 1:18, 1:20, 1:22, 1:24, 1:26, 1:28, etc.

[0020] Preferably, the mass ratio of lactic acid to sodium lactate is 1:(10-20).

[0021] Preferably, the oil comprises any one of dimethicone, cetyl dimethicone, squalane, jojoba seed oil, caprylic / capric triglyceride, isononyl isononanoate, tocopherol, beeswax, isohexadecane or shea butter esters, or a combination of at least two thereof.

[0022] Preferably, the moisturizing agent further comprises glycerin and / or butylene glycol.

[0023] Preferably, the preservative includes any one of phenoxyethanol, ethylhexylglycerin, caprylyl glycol, pentylene glycol or cinnamone, or a combination of at least two thereof.

[0024] In a second aspect, the present disclosure provides a method for preparing the highly moisturizing facial cream according to the first aspect, the preparation method comprising the following steps:

[0025] The emulsifier, oil and preservative are mixed and dissolved to obtain phase A; the moisturizer is dissolved in water to obtain phase B; phase A is added to phase B and homogenized to obtain an O / W highly moisturizing facial cream.

[0026] Preferably, the emulsifier includes any one or a combination of at least two of cetyl PEG / PPG-10 / 1 dimethicone, glyceryl stearate or PEG-100 stearate.

[0027] In a third aspect, the present disclosure provides a method for preparing the highly moisturizing facial cream according to the first aspect, the preparation method comprising the following steps:

[0028] The emulsifier, oil and preservative are mixed and dissolved to obtain phase A; the moisturizer is dissolved in water to obtain phase B; phase B is added to phase A and homogenized to obtain a W / O highly moisturizing cream.

[0029] Preferably, the emulsifier includes any one or a combination of at least two of polyglyceryl-2 dipolyhydroxystearate, polyglyceryl-3 diisostearate, polyglyceryl-3 polyricinoleate, PEG-10 polydimethylsiloxane, polydimethylsiloxane PEG-10 / 15 crosspolymer or polyglyceryl-2 sesquioleate.

[0030] The numerical range described in the present disclosure includes not only the point values ​​listed above, but also any point values ​​between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present disclosure no longer exhaustively lists the specific point values ​​included in the range.

[0031] Compared with the prior art, the present disclosure has the following beneficial effects:

[0032] The composition of lactic acid and sodium lactate added to the highly moisturizing cream provided by the present disclosure can effectively increase the water content of the skin's stratum corneum and reduce transepidermal water loss without adding hyaluronic acid;

[0033] The highly moisturizing facial cream provided by the present disclosure can ensure moisturizing effects after being prepared into a W / O type or an O / W type. DETAILED DESCRIPTION

[0034] The technical solution of the present disclosure is further described below through specific implementation methods. Those skilled in the art should understand that the embodiments are only used to help understand the present disclosure and should not be regarded as specific limitations of the present disclosure.

[0035] As used herein, the terms "comprises," "including," "having," "containing" or any other variations thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a listed element is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0036] "Optional" or "either" means that the subsequently described event or circumstance can or cannot occur, and that the description includes instances where the event occurs and instances where it does not.

[0037] The indefinite articles "a" and "an" before the elements or components of the present disclosure do not limit the quantity requirement (i.e., the number of times the elements or components appear). Therefore, "a" or "an" should be interpreted as including one or at least one, and elements or components in the singular also include plural forms, unless the quantity clearly refers to only the singular form.

[0038] The terms "one embodiment," "some embodiments," "exemplarily," "specific examples," or "some examples" used in this disclosure mean that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the disclosure. In this document, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example.

[0039] The sources of reagents or instruments in the following examples are as follows:

[0040] In this disclosure, unless otherwise explicitly stated, percentages and contents are all based on mass. Unless otherwise specified, the experimental methods used are conventional methods, and the materials and reagents used can be purchased from commercial sources.

[0041] Examples 1-5

[0042] This embodiment provides a highly moisturizing facial cream. The raw materials of the facial cream are shown in Table 1. The raw materials in the table are added in percentage by mass, and the total amount is 100%.

[0043] Comparative Examples 1-4

[0044] This comparative example provides a highly moisturizing facial cream. The raw materials of the facial cream are shown in Table 1. The raw materials in the table are added in percentage by mass, and the total amount is 100%.

[0045] Table 1

[0046] The preparation methods of Examples 1-5 and Comparative Examples 1-4 are as follows:

[0047] The emulsifier, oil and preservative are mixed and stirred at 85°C to dissolve to obtain phase A; the moisturizer is mixed with water and heated to 85°C to dissolve to obtain phase B; phase A is added to phase B and homogenized for 5 minutes to obtain an O / W highly moisturizing cream.

[0048] Examples 6-10

[0049] This embodiment provides a highly moisturizing facial cream. The raw materials of the facial cream are shown in Table 2. The raw materials in the table are added in percentage by mass, and the total amount is 100%.

[0050] Comparative Examples 5-8

[0051] This comparative example provides a highly moisturizing facial cream. The raw materials of the facial cream are shown in Table 2. The raw materials in the table are added in percentage by mass, and the total amount is 100%.

[0052] Table 2

[0053] The preparation methods of Examples 6-10 and Comparative Examples 5-8 are as follows:

[0054] The emulsifier, oil and preservative are mixed and stirred at 85°C to dissolve to obtain phase A; the moisturizer is mixed with water and heated to 85°C to dissolve to obtain phase B; phase B is slowly added to phase A and homogenized for 10 seconds to obtain a W / O highly moisturizing cream.

[0055] Test Case

[0056] Stratum corneum water content test and transepidermal water loss test

[0057] Twelve healthy female volunteers aged 25-45 years with no history of allergies were selected to test the highly moisturizing creams of the examples and comparative examples. All subjects signed informed consent forms. During the test, the inner sides of the left and right forearms of the subjects were used as test sites for immediate testing, and the water content of the stratum corneum of the skin was compared before and 30 minutes after using the product. The test products were tested at 2.0±0.1mg / cm 2 Use a latex fingertip to evenly coat the sample on (2cm 2 ×2cm 2 ) In the test area, MPA580-CM825 and MPA4-CM825 instruments were used for testing.

[0058] The data of the stratum corneum water content growth rate (%) and transepidermal water loss (TEWL) after the test subjects used the examples and comparative examples are shown in Tables 3 and 4.

[0059] Table 3

[0060] Table 4

[0061] According to the data in the table, it can be seen from Examples 1-3 and Examples 6-8 that the highly moisturizing facial cream provided by the present disclosure, after being prepared into an O / W type or W / O type, has an excellent moisturizing effect when the ratio of lactic acid to sodium lactate is 1:(10-20), and the transepidermal water loss rate is greatly reduced.

[0062] It can be seen from Example 1 and Examples 4-5 that the ratio of lactic acid and sodium lactate in the O / W type cream is 1:(5-30), the moisturizing effect is also very good, and the transepidermal water loss rate will increase; it can be seen from Example 1 and Comparative Examples 1-2 that lactic acid and sodium lactate work synergistically to enhance the moisturizing effect, and the use of a single ingredient will greatly reduce the moisturizing effect; it can be seen from Example 1 and Comparative Example 3 that when lactic acid and sodium lactate are replaced with hyaluronic acid commonly used in the prior art of equal mass, the growth rate of stratum corneum water content decreases, and the transepidermal water loss rate significantly increases; it can be seen from Example 1 and Comparative Example 4 that when hyaluronic acid is added while using lactic acid and sodium lactate, the stratum corneum water content and transepidermal water loss rate not only do not improve, but are deteriorating.

[0063] It can be seen from Examples 6 and 9-10 that the ratio of lactic acid and sodium lactate in the O / W type cream is 1:(5-30), the moisturizing effect is also very good, and the transepidermal water loss rate will be reduced; it can be seen from Example 6 and Comparative Examples 5-6 that lactic acid and sodium lactate work synergistically to enhance the moisturizing effect, and the use of a single ingredient will greatly reduce the moisturizing effect; it can be seen from Example 6 and Comparative Example 7 that when lactic acid and sodium lactate are replaced with hyaluronic acid commonly used in the prior art of equal mass, the growth rate of stratum corneum water content decreases, and the transepidermal water loss rate increases significantly; it can be seen from Example 6 and Comparative Example 8 that when hyaluronic acid is added while lactic acid and sodium lactate are used, the stratum corneum water content and transepidermal water loss rate not only do not improve, but are deteriorating.

[0064] The applicant declares that while the present disclosure illustrates the process method disclosed herein through the aforementioned embodiments, the present disclosure is not limited to the aforementioned embodiments, and does not necessarily rely on the aforementioned embodiments for implementation. Persons skilled in the art should understand that any improvements to the present disclosure, equivalent replacements for raw materials in the disclosed product, addition of auxiliary ingredients, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present disclosure.

[0065] The preferred embodiments of the present disclosure are described in detail above. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0066] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations. Industrial Applicability

[0067] The present disclosure provides a highly moisturizing facial cream and a preparation method thereof. These creams can effectively increase the water content of the skin's stratum corneum and reduce transepidermal water loss without adding hyaluronic acid, overcoming the shortcomings of moisturizers containing hyaluronic acid that tend to produce a falsely slippery feeling during application and a sticky feeling after application. The creams are skin-friendly and have excellent moisturizing effects. Furthermore, the highly moisturizing facial creams provided by the present disclosure can ensure moisturizing effects after being prepared in either a W / O or O / W type, thereby expanding the scope of application of the highly moisturizing facial creams and the preparation method thereof.

[0068] Furthermore, it is understood that the highly moisturizing facial cream and its preparation method disclosed herein are reproducible and can be used in a variety of industrial applications, for example, in the field of cosmetics technology.

Claims

1. A highly moisturizing facial cream, characterized in that: The raw materials of the highly moisturizing facial cream include emulsifier, oil, moisturizer and preservative; The moisturizer comprises lactic acid and sodium lactate; The moisturizer does not contain hyaluronic acid.

2. The highly moisturizing facial cream according to claim 1, characterized in that: Calculated by mass percentage, the raw materials of the highly moisturizing facial cream include 0.1-6% of emulsifier, 10-40% of oil, 15-40% of moisturizer and 0.1-6% of preservative.

3. The highly moisturizing facial cream according to claim 1 or 2, characterized in that: The total amount of lactic acid and sodium lactate accounts for 10-20% of the highly moisturizing cream; Preferably, the mass ratio of lactic acid to sodium lactate is 1:(5-30); Preferably, the mass ratio of lactic acid to sodium lactate is 1:(10-20).

4. The highly moisturizing facial cream according to any one of claims 1 to 3, characterized in that: The oil comprises any one of polydimethylsiloxane, cetyl polydimethylsiloxane, squalane, jojoba seed oil, caprylic / capric triglyceride, isononyl isononanoate, tocopherol, beeswax, isohexadecane or shea butter esters, or a combination of at least two thereof.

5. The highly moisturizing facial cream according to any one of claims 1 to 4, characterized in that: The moisturizing agent also includes glycerin and / or butylene glycol.

6. The highly moisturizing facial cream according to any one of claims 1 to 5, characterized in that: The preservative includes any one of phenoxyethanol, ethylhexylglycerin, caprylyl glycol, pentylene glycol or phenoxyethanol, or a combination of at least two thereof.

7. A method for preparing the highly moisturizing facial cream according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: The emulsifier, oil and preservative are mixed and dissolved to obtain phase A; the moisturizer is dissolved in water to obtain phase B; phase A is added to phase B and homogenized to obtain an O / W highly moisturizing facial cream.

8. The preparation method according to claim 7, characterized in that: The emulsifier includes any one of cetyl PEG / PPG-10 / 1 polydimethylsiloxane, glyceryl stearate or PEG-100 stearate.

9. A method for preparing the highly moisturizing facial cream according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: The emulsifier, oil and preservative are mixed and dissolved to obtain phase A; the moisturizer is dissolved in water to obtain phase B; phase B is added to phase A and homogenized to obtain a W / O highly moisturizing cream.

10. The preparation method according to claim 9, characterized in that: The emulsifier includes any one of polyglyceryl-2 dipolyhydroxystearate, polyglyceryl-3 diisostearate, polyglyceryl-3 polyricinoleate, PEG-10 polydimethylsiloxane, polydimethylsiloxane PEG-10 / 15 cross-linked polymer or polyglyceryl-2 sesquioleate, or a combination of at least two thereof.

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