An emulsified composition, a cosmetic containing the same, and a method for preparing the same

Abstract

This invention discloses an emulsifying composition, a cosmetic containing the same, and a method for preparing the same. The emulsifying composition comprises, by weight, the following components: 50-60 parts of a first oil, 22.5-40 parts of polyglycerol fatty acid ester, and 10-25 parts of lauroyl lysine. While ensuring excellent emulsifying properties, this emulsifying composition and the cosmetic containing it offer advantages in multiple aspects, including high stability, superior skin feel, and excellent efficacy.

Description

Technical Field

[0001] This invention relates to an emulsified composition, cosmetics containing the same, and a method for preparing the same. Background Technology

[0002] Water-in-oil (W / O) emulsions refer to emulsion systems where the continuous phase is oil and the internal phase is water. Depending on the composition of the oil phase, they can be further divided into oil-dispersion systems, silicone-dispersion systems, and oil-silicone-coated composite dispersion systems. Compared to traditional oil-in-water (O / W) systems, water-in-oil systems have significant advantages in moisturizing, waterproofing, and occlusive repair properties, thus occupying an irreplaceable position in the cosmetics market, especially in high-end skincare creams, sunscreens, and base makeup, showing promising market prospects.

[0003] However, the construction and stabilization of water-in-oil emulsion systems are more complex than those of oil-in-water emulsion systems, and their stability is highly dependent on the selection and combination of water-in-oil emulsifiers. This is mainly due to two major challenges: first, most emulsifiers have a lower ability to generate micelles in the oil phase than in the aqueous phase, resulting in lower emulsification efficiency; second, the dispersion of the aqueous phase generates a large surface energy, and the aqueous phase tends to spontaneously aggregate to reduce energy after forming small droplets, requiring multiple factors to maintain the stability of the emulsion system.

[0004] In water-in-oil systems, polyglycerol esters (PGEs) are a class of nonionic emulsifiers suitable for oil-based matrices. Their molecules consist of hydrophilic polyglycerol chains linked by hydrophobic fatty acid chains via ester bonds. Their hydrophilic-lipophilic balance (HLB) value can be adjusted within a certain range by regulating the degree of polymerization of glycerol and the structure of the fatty acid chains. Some low-HLB PGEs are suitable for water-in-oil emulsion systems and exhibit good emulsifying properties and biocompatibility. Furthermore, PGEs are mild and low-irritant, with good moisturizing effects, and are therefore widely used in the cosmetics industry where safety is paramount.

[0005] However, the application of polyglycerol fatty acid esters still has limitations: polyglycerol fatty acid ester emulsion systems are generally quite sensitive to temperature changes. During long-term high-temperature storage or temperature cycling, problems such as loosening of the emulsion's microstructure, decrease in viscosity, and even demulsification can easily occur, ultimately affecting product stability. Furthermore, emulsion systems with high polyglycerol fatty acid ester content often fail to guarantee the skin feel and efficacy during actual use, such as a heavy stickiness and poor moisturizing properties. Summary of the Invention

[0006] To overcome the shortcomings of existing emulsion systems containing polyglycerol fatty acid esters in simultaneously achieving stability, skin feel, and efficacy in practical use, this invention provides an emulsion composition, a cosmetic containing the same, and a method for preparing the same. This emulsion composition ensures excellent emulsification performance while maintaining high stability. When used directly as a product, it also guarantees excellent skin feel and efficacy; further application in cosmetics maintains high stability, superior skin feel, and excellent efficacy.

[0007] To achieve the above objectives, the present invention adopts the following technical solution.

[0008] This invention provides an emulsifying composition comprising, by weight, the following components: The first oil contains 50-60 parts, polyglycerol fatty acid esters contain 22.5-40 parts, and lauroyl lysine contains 10-25 parts.

[0009] This invention is based on a polyglycerol fatty acid ester emulsion system. Through repeated screening, an unexpected ingredient (lauroyl lysine) was discovered that can enhance the stability of the emulsion system while also improving skin feel and efficacy. Furthermore, numerous experimental results show that, based on the above dosage and the presence of the first oil, polyglycerol fatty acid ester and lauroyl lysine can exhibit synergistic effects.

[0010] In this invention, "first" and "second" are only used to distinguish different parameters and have no actual limiting effect, such as "first grease" and "second grease".

[0011] In some embodiments, the polyglycerol fatty acid ester includes one or more of polyglycerol-3 distearate, polyglycerol-2 dihydroxystearate, polyglycerol-6 polyricinoleate, polyglycerol-2 triisostearate, polyglycerol-3 polyricinoleate, polyglycerol-2 oleate, and polyglycerol-4 diisostearate / polyhydroxystearate / sepiacetate, preferably polyglycerol-3 polyricinoleate and / or polyglycerol-2 triisostearate, and more preferably polyglycerol-3 polyricinoleate.

[0012] In some embodiments, the first grease includes polar grease and / or non-polar grease, preferably polar grease. Polar grease refers to grease whose molecules contain polar groups (such as hydroxyl, carboxyl, ester groups, etc.), resulting in non-coincidence of positive and negative charge centers, allowing deflection in an electric field, and having a non-zero dipole moment. Non-polar grease refers to grease with a highly symmetrical molecular structure, containing little or no polar groups, with coincident positive and negative charge centers, and a zero dipole moment; those skilled in the art will understand the specific meanings of these terms. Furthermore, research by this invention has found that when the first grease in the emulsified composition is a polar grease, the emulsifying performance is significantly better than that of a non-polar grease.

[0013] In some embodiments, the first oil includes natural oils and / or synthetic oils. Natural oils refer to oils extracted directly from plant or animal sources without chemical modification; synthetic oils refer to oils obtained through chemical synthesis or biological modification. Those skilled in the art will understand the specific meanings of these terms.

[0014] In some preferred embodiments, the first grease is a natural polar grease and / or a synthetic polar grease.

[0015] The natural polar oils preferably include one or more of coconut oil, avocado oil, grapeseed oil and wheat germ oil, and more preferably coconut oil.

[0016] Preferably, the synthetic polar oils include one or more of palmitate oils, myristate oils, and caprylic / capric triglyceride oils; the caprylic / capric triglyceride oils are, for example, caprylic / capric triglyceride.

[0017] In some embodiments, the HLB value of the polyglycerol fatty acid ester is not higher than 6, preferably 3-5, for example 4.

[0018] In some embodiments, the lauroyl lysine has an average particle size of 5-30 μm, preferably 5-20 μm.

[0019] In some embodiments, the first grease is a solid grease and / or a liquid grease, preferably a liquid grease.

[0020] In some embodiments, the first oil is 50-55 parts by weight.

[0021] In some embodiments, the polyglycerol fatty acid ester is present in parts by weight of 25-40, for example, 27.78 or 33.33.

[0022] In some embodiments, the lauroyl lysine is present in 15-25 parts by weight, for example, 22.22 parts or 16.67 parts.

[0023] In some preferred embodiments, the emulsifying composition comprises, by weight, 50-60 parts of a first oil, 22.5-40 parts of a polyglycerol fatty acid ester, and 10-25 parts of lauroyl lysine; wherein the first oil is a natural polar oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate and / or polyglycerol-2 triisostearate.

[0024] In some preferred embodiments, the emulsifying composition comprises, by weight, 50-55 parts of a first oil, 25-40 parts of a polyglycerol fatty acid ester, and 10-25 parts of lauroyl lysine; wherein the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate and / or polyglycerol-2 triisostearate.

[0025] In some specific embodiments, the emulsifying composition comprises, by weight, the following components: 50 parts of a first oil, 40 parts of a polyglycerol fatty acid ester, and 10 parts of lauroyl lysine; wherein the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate.

[0026] In some specific embodiments, the emulsifying composition comprises, by weight, the following components: 50 parts of a first oil, 25 parts of a polyglycerol fatty acid ester, and 25 parts of lauroyl lysine; wherein the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate.

[0027] In some specific embodiments, the emulsifying composition comprises, by weight, the following components: 50 parts of a first oil, 27.78 parts of a polyglycerol fatty acid ester, and 22.22 parts of lauroyl lysine; wherein the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate.

[0028] In some specific embodiments, the emulsifying composition comprises, by weight, the following components: 50 parts of a first oil, 33.33 parts of a polyglycerol fatty acid ester, and 16.67 parts of lauroyl lysine; wherein the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate.

[0029] In some specific embodiments, the emulsifying composition comprises, by weight, the following components: 50 parts of a first oil, 40 parts of a polyglycerol fatty acid ester, and 10 parts of lauroyl lysine; wherein the first oil is coconut oil and the polyglycerol fatty acid ester is polyglycerol-2 triisostearate.

[0030] In some specific embodiments, the emulsifying composition comprises, by weight, the following components: 50 parts of a first oil, 25 parts of a polyglycerol fatty acid ester, and 25 parts of lauroyl lysine; wherein the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-2 triisostearate.

[0031] The present invention also provides a method for preparing the emulsified composition as described above, the method comprising the following steps: The first oil, polyglycerol fatty acid ester, and lauroyl lysine are mixed together to obtain the final product.

[0032] The present invention also provides a cosmetic product comprising the emulsified composition as described above.

[0033] In this invention, the cosmetic product may be a skin care product, a sun protection product, or a base makeup product; wherein, the skin care product is, for example, a cream, the sun protection product is, for example, a sunscreen, and the base makeup product is, for example, a foundation.

[0034] In some embodiments, the cosmetic is a cream, and the cream comprises, by weight, the following components in 100 parts: The emulsifying composition consists of 6-20 parts, the second oil 10-45 parts, the thickener 0.1-5 parts, and water.

[0035] In some preferred embodiments, the emulsified composition in the cream is 6-10 parts by weight, for example 7.6 parts or 9 parts.

[0036] In some preferred embodiments, the second oil in the cream is a polar oil and / or a non-polar oil.

[0037] In some preferred embodiments, the second oil in the cream comprises natural oils and / or synthetic oils.

[0038] In some more preferred embodiments, in the cream, the second oil is one or more of natural polar oils, natural non-polar oils, and synthetic polar oils.

[0039] The natural polar oils preferably include one or more of coconut oil, avocado oil, grapeseed oil and wheat germ oil, and more preferably coconut oil.

[0040] The natural nonpolar oil preferably includes squalane.

[0041] Preferably, the synthetic polar oils include one or more of palmitate oils, myristate oils, and caprylic / capric triglyceride oils; the caprylic / capric triglyceride oils are, for example, caprylic / capric triglyceride.

[0042] In some preferred embodiments, the second oil in the cream is 14-42 parts by weight, for example 14.8 parts, 39.5 parts or 40.5 parts.

[0043] In some preferred embodiments, the thickener in the cream is a naturally derived thickener; and / or, the thickener is a hydrophilic thickener; preferably, the thickener includes one or more of xanthan gum, chondrus crispus extract, sclerotium gum, and cellulose gum, such as xanthan gum.

[0044] In some preferred embodiments, the thickener in the cream is 0.1-1 parts by weight, for example 0.4 or 0.5 parts.

[0045] In some preferred embodiments, the cream further includes polyols and / or additives.

[0046] The polyol preferably includes 1,3-butanediol.

[0047] The polyol is preferably in the form of 5-10 parts by weight, for example, 7.5 parts.

[0048] The additive preferably includes sodium chloride.

[0049] The additive is preferably present in a weight ratio of 0.1-2 parts, for example, 0.7 parts.

[0050] In some preferred embodiments, the cream comprises, by weight, 6-10 parts of an emulsifying composition, 14-42 parts of a second oil, 0.1-1 parts of a thickener, and water, based on a total weight of 100 parts.

[0051] In some preferred embodiments, the cream comprises, by weight, 9-10 parts of an emulsifying composition, 39.5-40.5 parts of a second oil, 0.1-1 parts of a thickener, and water, based on a total weight of 100 parts.

[0052] In some other preferred embodiments, the cream comprises, by weight, 6-7.6 parts of an emulsifying composition, 14-14.8 parts of a second oil, 0.1-1 parts of a thickener, 5-10 parts of a polyol, 0.1-2 parts of an additive, and water, based on a total weight of 100 parts.

[0053] In some specific embodiments, the cream comprises, by weight, 9 parts of an emulsifying composition, 40.5 parts of a second oil, 0.5 parts of a thickener, and water, based on a total weight of 100 parts; the second oil is coconut oil, and the thickener is xanthan gum.

[0054] In some specific embodiments, the cream comprises, by weight, 10 parts of the following components, based on a total weight of 100 parts: 10 parts of an emulsifying composition, 39.5 parts of a second oil, 0.5 parts of a thickener, and water; the second oil is coconut oil, and the thickener is xanthan gum.

[0055] In some specific embodiments, the cream comprises, by weight, 7.6 parts of an emulsifying composition, 14.8 parts of a second oil, 0.4 parts of a thickener, 7.5 parts of a polyol, 0.7 parts of an additive, and water, based on a total weight of 100 parts of the cream; the second oil is coconut oil, the thickener is xanthan gum, the polyol is 1,3-butanediol, and the additive is sodium chloride.

[0056] Based on the cream formulation described above, the inventors further discovered that when the polyglycerol fatty acid ester in the emulsifying composition is polyglycerol-3 polyricinoleate, and both the first oil in the emulsifying composition and the second oil in the cream are polar oils, the overall performance (stability, skin feel, and efficacy) of the resulting cream is relatively optimal.

[0057] In some preferred embodiments, the method for preparing the cream includes the following steps: S1. Mix the emulsified composition and the second oil to obtain an oil phase; S2. The thickener and water are mixed to obtain an aqueous phase; S3. Add the aqueous phase to the oil phase and mix to obtain the final product; Wherein, when the cream further includes the polyol and / or additives, step S2 includes: The thickener, polyol, additive and water are mixed to obtain an aqueous phase.

[0058] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0059] The reagents and raw materials used in this invention are all commercially available.

[0060] The positive and progressive effects of this invention are as follows: The emulsifying composition of the present invention is based on a compounding of a first oil, polyglycerol fatty acid ester and lauroyl lysine in specific amounts. While ensuring excellent emulsifying performance, it can also take into account excellent stability. When used directly as a product, it can also ensure excellent skin feel and efficacy. When further used in cosmetics, it can still ensure high stability (such as centrifugal stability and long-term stability), excellent skin feel (such as excellent spreadability, stickiness and softness) and excellent efficacy (such as high moisturizing). Detailed Implementation

[0061] The present invention is further illustrated below by way of embodiments, but the invention is not limited to the scope of the embodiments described herein. Experimental methods in the following embodiments that do not specify specific conditions were performed according to conventional methods and conditions, or as selected according to the product instructions.

[0062] The specific information of the raw materials used in the following examples and comparative examples is as follows: Polyglycerol-3 polyricinoleate, trade name EvicarePGPR, purchased from Evident, HLB value 4; Polyglycerol-2 triisostearate, trade name PasterPG2TIS, purchased from Biodex, HLB value 3; Lauroyl lysine, trade name Benst LKA-95, is supplied by Changsha Puji (after high-speed grinding, the average particle size was measured to be 5-20μm). Coconut oil, brand name MCT Oil, purchased from DRACO; Xanthan gum, brand name VPC930, purchased from Cargill; Caprylic / capric triglyceride, brand name PasterGTCC, purchased from Biodex; Squalane, trade name OliveSqualane, purchased from EFP.

[0063] Examples 1-6 and Comparative Examples 1-4

[0064] According to the proportions in Table 1, prepare the corresponding emulsion compositions from the raw materials as follows: Weigh out coconut oil and lauroyl lysine separately, add them to polyglycerol fatty acid ester, and grind and mix thoroughly using a three-roll mill until the sample is a uniform emulsion, thus obtaining the corresponding emulsion composition, which is ready for use.

[0065] Among them, Comparative Examples 1, 2 and 4 involve only single polyglycerol fatty acid esters or lauroyl lysine.

[0066] Table 1

[0067] The " / " in the table means that the component is not included in the group.

[0068] Example 1

[0069] For the partial emulsified compositions or single substances of Examples 1-6 and Comparative Examples 1-4, the present invention conducted consumer sensory effect evaluations through the following steps: Test samples: the emulsified composition of Example 2 and the polyglycerol fatty acid ester of Comparative Example 1.

[0070] Subjects: 10 healthy subjects aged 18-60 years, regardless of gender.

[0071] Test Methodology: This test is a randomized, double-blind, medial forearm test design. Ten eligible subjects were selected to participate in this test.

[0072] The test samples of Example 2 and Comparative Example 1 were applied to the inner side of the subject's forearm to examine spreadability, stickiness, and softness. The two samples were scored (1-5 points). The test content and results are shown in Table 2.

[0073] Table 2

[0074] The above analysis examined the skin feel differences between the examples (emulsified composition obtained by combining coconut oil, polyglycerol fatty acid esters, and lauroyl lysine) and the comparative example (single polyglycerol fatty acid ester). The average results show that the examples (emulsified composition obtained by combining coconut oil, polyglycerol fatty acid esters, and lauroyl lysine) can improve the spreadability and stickiness of single polyglycerol fatty acid ester, thus improving the skin feel.

[0075] Based on the above emulsified composition, the present invention further prepared a series of water-in-oil emulsion creams and tested them accordingly. The creams comprise 0-10 parts of the emulsified composition (Examples 1-6 and Comparative Examples 1-4), 39.5-47 parts of oil, 0.5 parts of a naturally derived thickener, and the remainder being water.

[0076] Application Example 1-5 and Comparative Application Example 1-6

[0077] According to the proportions in Table 3, the raw materials were prepared into creams for Application Examples 1-5 and Comparative Application Examples 1-6 using the following steps: Weigh the oil phase (A) and aqueous phase (B) separately, and place them in a 40℃ water bath for insulation. When the contents reach approximately 38℃, the experiment can begin. First, stir phase A at 500 rpm. Second, gradually add phase B to phase A. When it reaches 50%, adjust the stirring speed to 600 rpm and continue adding. Third, stop stirring and homogenize at 7000 rpm for 1 minute. Finally, maintain the temperature below 35℃ before discharging.

[0078] Example 2

[0079] For the creams in Application Examples 1-5 and Comparative Application Examples 1-6, the present invention conducted stability tests through the following steps: 1. Centrifugation stability: The creams from Application Examples 1-5 and Comparative Application Examples 1-6 were centrifuged (2000 rpm, 30 min) and the separation and effluent were observed.

[0080] 2. Long-term stability: The creams from Application Examples 1-5 and Comparative Application Examples 1-6 were placed at room temperature for 3 months, and the layering was observed. The emulsification value was calculated (the emulsification value is equal to the height of the emulsion / the total height of the material; where the emulsion refers to the emulsion-like material in the resulting material).

[0081] The final results of sample stability are shown in Table 3.

[0082] Table 3

[0083] The creams used in the application examples 1-5 shown in Table 3 have emulsifying compositions made of coconut oil, lauroyl lysine and polyglycerol-3 polyricinoleate, with a weight ratio of 5:(2.5-4):(1-2.5) between coconut oil, polyglycerol-3 polyricinoleate and lauroyl lysine.

[0084] Table 3 shows the creams in Comparative Application Examples 1-5, which use a single raw material (lauroyl lysine or polyglycerol-3 polyricinoleate) for emulsification; the cream in Comparative Application Example 6 has a weight ratio of coconut oil, polyglycerol-3 polyricinoleate, and lauroyl lysine in its emulsification composition that is outside the scope of protection of this invention, which is 5:1:4.

[0085] The results show that the creams of Examples 1-5 all maintain excellent stability when using the emulsified compositions obtained in Examples 1-4.

[0086] Compared to Application Examples 3-4, and compared to Application Example 2, when only a single polyglycerol-3 polyricinoleate (instead of a combination of lauroyl lysine and polyglycerol-3 polyricinoleate) was used as an emulsifier, and the content of this component was the same, the centrifugal stability and long-term stability were significantly reduced.

[0087] Compared to Application Examples 2 and 4-5, and compared to Application Examples 1 and 3, when using only polyglycerol-3 polyricinoleate (instead of a combination of lauroyl lysine and polyglycerol-3 polyricinoleate) as an emulsifier, it is necessary to ensure that the content of this component is consistent with the total content of the two combined (i.e., the amount of polyglycerol-3 polyricinoleate used is significantly higher) in order to obtain comparable centrifugal stability and long-term stability. However, based on the data in Table 2, the cream obtained under this condition will have a significantly worse skin feel when actually applied, which will affect its practical application.

[0088] Compared to Application Examples 1 and 3, in Application Example 5, when only lauroyl lysine (instead of a combination of lauroyl lysine and polyglycerol-3 polyricinoleate) was used as an emulsifier, and the content of this component was the same as the total content of the two combined, the centrifugal stability and long-term stability were significantly reduced.

[0089] Compared to Application Examples 1 and 3, Application Example 6, which uses lauroyl lysine and polyglycerol-3 polyricinoleate as a blend of emulsifiers and has the same total content after blending, cannot guarantee excellent centrifugal stability and long-term stability even if only the ratio of the two is adjusted.

[0090] It is evident that if a single polyglycerol fatty acid ester (rather than a combination of lauroyl lysine and polyglycerol fatty acid ester) is used as an emulsifier, a certain level of stability can only be guaranteed by increasing the dosage, but it is difficult to guarantee the skin feel during use at the same time. If a single lauroyl lysine (rather than a combination of lauroyl lysine and polyglycerol fatty acid ester) is used as an emulsifier, it is difficult to improve stability even if the dosage is increased. In addition, even if a combination of the two is used as an emulsifier, a certain dosage ratio must be met in order to achieve both stability and skin feel improvement.

[0091] Application Examples 6-7 and Comparative Application Example 7

[0092] According to the proportions in Table 4, the raw materials were prepared into creams for Application Examples 6-7 and Comparative Application Example 7 using the following steps: Weigh the oil phase (A) and aqueous phase (B) separately, and place them in a 40℃ water bath for insulation. When the contents reach approximately 38℃, the experiment can begin. First, stir phase A at 500 rpm. Second, gradually add phase B to phase A. When it reaches 50%, adjust the stirring speed to 600 rpm and continue adding. Third, stop stirring and homogenize at 7000 rpm for 1 minute. Finally, maintain the temperature below 35℃ before discharging.

[0093] Example 3

[0094] For the creams in Application Examples 6-7 and Comparative Application Example 7, the present invention conducted stability tests through the following steps: 1. Centrifugation stability: The creams from Application Examples 6-7 and Comparative Application Example 7 were centrifuged (2000 rpm, 30 min) and the separation and effluent were observed.

[0095] 2. Long-term stability: The creams from Application Examples 6-7 and Comparative Application Example 7 were placed at room temperature for 3 months, and the layering was observed. The emulsification value was calculated (the emulsification value is equal to the height of the emulsion / the total height of the material).

[0096] The final results of sample stability are shown in Table 4.

[0097] Table 4

[0098] The creams used in Application Examples 6-7 shown in Table 4 have emulsifying compositions made of coconut oil, lauroyl lysine, and polyglycerol-2 triisostearate, with a weight ratio of 5:(2.5-4):(1-2.5) between coconut oil, polyglycerol-2 triisostearate, and lauroyl lysine.

[0099] Table 4 shows the cream in Comparative Application Example 7, which uses a single raw material (polyglycerol-2 triisostearate) for emulsification.

[0100] The results showed that the creams in Application Examples 6-7, which used the emulsifying compositions obtained in Examples 5-6 (a combination of lauroyl lysine and polyglycerol-2 triisostearate), exhibited significantly better long-term stability compared to Application Example 7, which used only polyglycerol-2 triisostearate as an emulsifier, and whose total content after combination was the same as that of the single component.

[0101] Application Example 8-10 and Comparative Application Example 8-9

[0102] According to the proportions in Table 5, the raw materials were prepared into creams for Application Examples 8-10 and Comparative Application Examples 8-9 as follows: Weigh the oil phase (A) and aqueous phase (B) separately, and place them in a 40℃ water bath for insulation. When the contents reach approximately 38℃, the experiment can begin. First, stir phase A at 500 rpm. Second, gradually add phase B to phase A. When it reaches 50%, adjust the stirring speed to 600 rpm and continue adding. Third, stop stirring and homogenize at 7000 rpm for 1 minute. Finally, maintain the temperature below 35℃ before discharging.

[0103] Example 4

[0104] For the creams used in Application Examples 8-10 and Comparative Application Examples 8-9, the present invention conducted stability tests through the following steps: 1. Centrifugation stability: The creams from Application Examples 8-10 and Comparative Application Examples 8-9 were centrifuged (2000 rpm, 30 min) and the separation and effluent were observed.

[0105] 2. Long-term stability: The creams from Application Examples 8-10 and Comparative Application Examples 8-9 were placed at room temperature for 3 months, and the layering was observed. The emulsification value was calculated (the emulsification value equals the height of the emulsion / the total height of the material).

[0106] The final results of sample stability are shown in Table 5.

[0107] Table 5

[0108] The results show that the creams of Examples 8-10, when using the emulsified compositions obtained in Examples 1-2, can maintain good stability, especially long-term stability, even when combined with different oils.

[0109] Compared to Application Example 8, and compared to Application Example 9-10, only when the types of oils are the same, and only a single polyglycerol fatty acid ester (rather than a combination of lauroyl lysine and polyglycerol fatty acid ester) is used as an emulsifier, and the content of this component is significantly higher than the total content of the two combined (i.e., the amount of polyglycerol fatty acid ester used is significantly higher), can considerable centrifugal stability and long-term stability be guaranteed. However, similarly, based on the data in Table 2, the cream obtained under these circumstances will have a significantly worse skin feel when actually applied, which will affect its practical application.

[0110] The results also show that, in different oil systems, even when the present invention uses an emulsified composition to combine lauroyl lysine and polyglycerol fatty acid ester as emulsifiers to prepare a cream, the resulting cream does not suffer from a decrease in stability due to a reduction in the amount of polyglycerol fatty acid ester, and can still maintain an improved skin feel.

[0111] In summary, when polyglycerol fatty acid esters and lauroyl lysine are compounded in the emulsified composition at a preferred ratio of 4:1 to 1:1, they form a perfect complement in terms of stability and skin feel adjustment, and their synergistic effect produces a technical effect of "1+1 equals or is greater than 2".

[0112] Application Example 11 and Comparative Application Examples 10-11

[0113] According to the proportions in Table 6, the raw materials were prepared into creams for Application Example 11 and Comparative Application Example 11 using the following steps: Weigh the oil phase (A) and aqueous phase (B) separately, and place them in a 40℃ water bath for insulation. When the contents reach approximately 38℃, the experiment can begin. First, stir phase A at 500 rpm. Second, gradually add phase B to phase A. When it reaches 50%, adjust the stirring speed to 600 rpm and continue adding. Third, stop stirring and homogenize at 7000 rpm for 1 minute. Finally, maintain the temperature below 35℃ before discharging.

[0114] The cream preparation process differs from that in Application Example 10. Lauroyl lysine is added by stirring. The specific process is as follows: Phase A and Phase C are weighed and stirred at a speed of 500 rpm; Phase B is gradually added to Phase A, and when it reaches 50%, the stirring speed is adjusted to 600 rpm; stirring is stopped, and homogenization is performed at 7000 rpm for 1 min; the material is discharged when the temperature is below 35°C.

[0115] Example 5

[0116] For the creams in Application Example 11 and Comparative Application Examples 10-11, the present invention conducted stability tests through the following steps: 1. Centrifugation stability: The creams from Application Example 11 and Comparative Application Examples 10-11 were centrifuged three times in sequence (first time, 2000 rpm, 30 min; second time, 3000 rpm, 30 min; third time, 3000 rpm, 30 min), and the stratification and effluent were observed respectively.

[0117] 2. Long-term stability: The creams from Application Example 11 and Comparative Application Examples 10-11 were placed at 50°C for 1 month, and the separation was observed.

[0118] The final results of sample stability are shown in Table 6.

[0119] Table 6

[0120] The " / " in the table means that the component is not involved in the phase.

[0121] The results show that the cream of Application Example 11, when using the emulsified composition obtained in Example 2, can ensure excellent centrifugal stability and long-term high-temperature stability.

[0122] Compared to Application Example 11, even though lauroyl lysine and polyglycerol fatty acid esters were used as emulsifiers in the system and their contents were kept consistent, the centrifugal stability and long-term high-temperature stability were significantly reduced when the two were not added in advance in a compounding manner.

[0123] Compared to Application Example 11, when only a single polyglycerol-3 polyricinoleate (instead of a combination of lauroyl lysine and polyglycerol fatty acid ester) is used as an emulsifier, and the content of this component is the same as the total content of the two combined, the centrifugal stability is significantly reduced. Even if the long-term high-temperature stability is comparable, it is difficult to improve the skin feel.

[0124] Example 6

[0125] Regarding the creams in Application Example 11 and Comparative Application Example 11, the present invention conducted relevant effect tests during use through the following steps: Subjects: 5 healthy subjects aged 18-60 years, regardless of gender.

[0126] Test Methodology: This test is a randomized, double-blind, medial forearm test design. Five eligible subjects were selected to participate in this test.

[0127] The creams used in Application Example 11 and Comparative Application Example 11 were applied to different areas on the inner forearm of the subjects, with each area measuring (3.0 × 3.0) cm². 2The study included a control group (areas where no cream was used) for comparison, for a total of three groups. The average increase in skin hydration after the subjects used the cream is shown in Table 7.

[0128] Table 7

[0129] The results showed that, compared with Application Example 11, using only polyglycerol-3 polyricinoleate (instead of lauroyl lysine and polyglycerol fatty acid ester) as an emulsifier, and with the same content of this ingredient as the total content of the two combined, resulted in a significantly poorer "hydrating" effect on the skin.

[0130] Example 7

[0131] For the creams in Application Example 11 and Comparative Application Example 11, the present invention conducted a consumer sensory effect evaluation through the following steps: Subjects: 10 healthy subjects aged 18-60 years, regardless of gender.

[0132] Test Methodology: This test is a randomized, double-blind, medial forearm test design. Ten eligible subjects were selected to participate in this test.

[0133] The test samples of Application Example 11 and Comparative Application Example 11 were applied to the inner side of the subject's forearm to examine spreadability, stickiness, and softness. The two samples were scored (1-5 points). The test content and results are shown in Table 8.

[0134] Table 8

[0135] The results showed that the cream obtained by application example 11 had a significantly better skin feel than that obtained by application example 11.

[0136] Based on the results of the above cream, it can be found that the emulsified composition of the present invention has multiple advantages, including high natural source, high stability, excellent skin feel, and enhanced moisturizing. Compared with formulations using polyglycerol fatty acid esters alone as emulsifiers, this emulsified composition can improve formulation stability, reduce the stickiness of the skin feel, enhance softness, and improve moisturizing performance. Furthermore, simply introducing lauroyl lysine as an emulsifier into the entire system, without prior compounding of polyglycerol fatty acid esters and lauroyl lysine, cannot guarantee the aforementioned excellent performance.

Claims

1. An emulsifying composition, characterized in that, The emulsified composition comprises the following components in parts by weight: 50-60 parts of the first oil, 22.5-40 parts of polyglycerol fatty acid ester and 10-25 parts of lauroyl lysine; The first oil is coconut oil; The polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate; The average particle size of the lauroyl lysine is 5-30 μm.

2. The emulsified composition according to claim 1, characterized in that, The emulsified composition satisfies one or more of the following conditions: (1) The polyglycerol fatty acid ester is in the form of 25-40 parts by weight; (2) The first oil is 50-55 parts by weight; (3) The weight of the lauroyl lysine is 15-25 parts.

3. The emulsified composition according to claim 1, characterized in that, The emulsified composition satisfies one or more of the following conditions: (1) The polyglycerol fatty acid ester is in the form of 27.78 parts or 33.33 parts by weight; (2) The average particle size of the lauroyl lysine is 5-20 μm.

4. The emulsified composition according to claim 1, characterized in that, The lauroyl lysine is present in 22.22 parts by weight or 16.67 parts by weight.

5. The emulsified composition according to claim 1, characterized in that, The emulsified composition comprises the following components in parts by weight: The first oil contains 50-55 parts, polyglycerol fatty acid ester contains 25-40 parts, and lauroyl lysine contains 10-25 parts; the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate.

6. The emulsified composition according to claim 1, characterized in that, The emulsified composition comprises the following components in parts by weight: The first oil contains 50 parts of coconut oil, and the polyglycerol fatty acid ester contains 40 parts of polyglycerol-3 polyricinoleate. Alternatively, 50 parts of a first oil, 25 parts of polyglycerol fatty acid ester and 25 parts of lauroyl lysine; the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate. Alternatively, 50 parts of a first oil, 27.78 parts of polyglycerol fatty acid ester, and 22.22 parts of lauroyl lysine; the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate; Alternatively, 50 parts of a first oil, 33.33 parts of a polyglycerol fatty acid ester, and 16.67 parts of lauroyl lysine; the first oil is coconut oil, and the polyglycerol fatty acid ester is polyglycerol-3 polyricinoleate.

7. A cosmetic product, characterized in that, The cosmetic is a cream, comprising the emulsified composition as described in any one of claims 1-6; and based on a total weight of 100 parts, the cream comprises the following components by weight: The emulsifying composition comprises 6-20 parts, the second oil comprises 10-45 parts, the thickener comprises 0.1-5 parts, and water; the second oil is a polar oil.

8. The cosmetic product as described in claim 7, characterized in that, The cream meets one or more of the following conditions: (1) The emulsified composition is 6-10 parts by weight; (2) The second oil includes natural oils and / or synthetic oils; (3) The second oil is 14-42 parts by weight; (4) The thickener is a naturally sourced thickener; (5) The thickener is a hydrophilic thickener; (6) The thickener is 0.1-1 parts by weight; (7) The cream also includes polyols and / or additives; the additive is sodium chloride.

9. The cosmetic product as described in claim 8, characterized in that, The cream meets one or more of the following conditions: (1) The emulsified composition comprises 7.6 parts or 9 parts by weight; (2) The second oil is a natural polar oil and / or a synthetic polar oil; the natural polar oil includes one or more of coconut oil, avocado oil, grape seed oil and wheat germ oil; the synthetic polar oil includes one or more of palmitate oil, myristate oil and caprylic / capric glyceride oil; (3) The second oil is 14.8 parts, 39.5 parts or 40.5 parts by weight; (4) The thickener includes one or more of xanthan gum, chondrus crispus extract, sclerotium gum and cellulose gum; (5) The thickener is present in a weight fraction of 0.4 or 0.5 parts; (6) The polyol includes 1,3-butanediol; (7) The polyol is 5-10 parts by weight; (8) The additive is 0.1-2 parts by weight.

10. The cosmetic product as described in claim 7, characterized in that, Based on a total weight of 100 parts, the cream comprises the following components by weight: 6-10 parts of emulsifying composition, 14-42 parts of second oil, 0.1-1 parts of thickener, and water.

11. The cosmetic product as described in claim 7, characterized in that, Based on a total weight of 100 parts, the cream comprises the following components by weight: 9-10 parts of emulsifying composition, 39.5-40.5 parts of second oil, 0.1-1 parts of thickener, and water; Alternatively, the composition may consist of 6-7.6 parts of an emulsifying composition, 14-14.8 parts of a second oil, 0.1-1 parts of a thickener, 5-10 parts of a polyol, 0.1-2 parts of an additive, and water.

12. The cosmetic product as described in claim 7, characterized in that, Based on a total weight of 100 parts, the cream comprises the following components in parts by weight: The mixture comprises 9 parts of an emulsifying composition, 40.5 parts of a second oil, 0.5 parts of a thickener, and water; the second oil is coconut oil, and the thickener is xanthan gum. Alternatively, the composition may consist of 10 parts of an emulsifying composition, 39.5 parts of a second oil, 0.5 parts of a thickener, and water; wherein the second oil is coconut oil and the thickener is xanthan gum. Alternatively, the composition comprises 7.6 parts of an emulsifying composition, 14.8 parts of a second oil, 0.4 parts of a thickener, 7.5 parts of a polyol, 0.7 parts of an additive, and water; wherein the second oil is coconut oil, the thickener is xanthan gum, the polyol is 1,3-butanediol, and the additive is sodium chloride.

13. The cosmetic product according to any one of claims 7-9, characterized in that, The preparation method of the cream includes the following steps: S1. Mix the emulsified composition and the second oil to obtain an oil phase; S2. The thickener and water are mixed to obtain an aqueous phase; S3. Add the aqueous phase to the oil phase and mix to obtain the final product; Wherein, when the cream further includes polyols and / or additives, step S2 includes: The thickener, polyol, additive, and water are mixed to obtain an aqueous phase; the additive is sodium chloride.

Images