An emulsifier composition for enhancing sun protection factor

Abstract

The present invention relates to the technical field of cosmetics, and particularly to an emulsifier composition for enhancing the sun protection value, comprising the following components: peg-4 polyglyceryl-2 stearate, potassium cetyl phosphate and cetearyl alcohol. The emulsifier composition provided by the present invention improves the emulsification effect of the oil-in-water system, that is, the emulsification particle size becomes smaller, and the interfacial film strength between oil and water is higher, so that demulsification will not occur during the application process. Furthermore, the surface of the skin continues to exist in the form of milk and spreads evenly. At this time, the sunscreen agent will also spread evenly on the skin surface along with the milk, thereby enhancing the sun protection value.

Description

Technical Field

[0001] The present invention relates to the technical field of cosmetics, and particularly relates to an emulsifier composition for enhancing the sun protection value. Background Art

[0002] Sun protection refers to taking some methods to block or absorb ultraviolet rays in order to prevent the skin from being sunburned or tanned. Among them, common sun protection methods include applying sun protection products, using items such as sun protection clothes, and consuming sun protection foods. In sun protection products, the level of the sun protection index (sun protection value) can reflect the magnitude of the ultraviolet ray protection ability of the sun protection product.

[0003] Currently, in sun protection cosmetics, the enhancement of the sun protection value has always been the object of research. The enhancement of the sun protection value is generally achieved through film-forming agents, some polar oils, and active substances with a soothing effect. Film-forming agents generally make the sun protection cosmetics spread evenly on the skin; while polar oils have a similar structure to sunscreens and act together with sunscreens; in addition, the relevant active substances have a soothing effect on the skin and inhibit the occurrence of skin erythema. Now, many sun protection cosmetics achieve the purpose of enhancing the sun protection value by improving the composition or content of film-forming agents and polar oils.

[0004] However, the improvement of film-forming agents and polar oils will make the cosmetics relatively thick and greasy, thus affecting the use feeling of the cosmetics. In addition, due to factors such as material research, the enhancement of the sun protection value by existing relevant active substances is generally not obvious. Therefore, it is necessary to improve from other components of sun protection cosmetics. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an emulsifier composition for enhancing the sun protection value, which can improve the emulsification effect of oil-in-water products, reduce the emulsification particle size, and increase the interfacial film strength of oil and water, thereby reducing the possibility of demulsification during the application process, ensuring that the oil-in-water products exist in the form of emulsion on the skin surface and spread evenly, and further enhancing the sun protection value.

[0006] To solve the above technical problem, the object of the present invention is achieved through the following technical solutions: providing an emulsifier composition for enhancing the sun protection value, comprising the following components: peg-4 polyglyceryl-2 stearate, potassium cetyl phosphate, and cetearyl alcohol.

[0007] Preferably, based on the total mass percentage of the cosmetics, the content of peg-4 polyglyceryl-2 stearate is 1-3%.

[0008] Preferably, based on the total mass percentage of the cosmetics, the content of potassium cetyl phosphate is 0.1-1%.

[0009] Preferably, based on the total mass percentage of the cosmetic, the content of cetearyl alcohol is 0.1-2%.

[0010] In addition, the technical problem to be solved by the present invention is also to provide a sunscreen cosmetic, comprising the emulsifier composition with enhanced sunscreen value as described above, that is, including the following components: peg-4 polyglyceryl-2 stearate, potassium cetyl phosphate and cetearyl alcohol.

[0011] Preferably, based on the total mass percentage of the sunscreen cosmetic, the content of peg-4 polyglyceryl-2 stearate is 1-3%

[0012] Preferably, based on the total mass percentage of the sunscreen cosmetic, the content of peg-4 polyglyceryl-2 stearate is 1-2%.

[0013] Preferably, based on the total mass percentage of the sunscreen cosmetic, the content of potassium cetyl phosphate is 0.1-1%.

[0014] Preferably, based on the total mass percentage of the sunscreen cosmetic, the content of cetearyl alcohol is 0.1-2%.

[0015] Preferably, based on the total mass percentage of the sunscreen cosmetic, the content of potassium cetyl phosphate is 0.5-1%, and the content of cetearyl alcohol is 0.5-1.5%.

[0016] The beneficial effects of the present invention are as follows: Most of the currently applied sunscreens are basically oils and fats, that is, more often the water-in-oil system or oil-in-water system is adopted and added to products such as cosmetics that can be applied to sunscreen. In the water-in-oil sunscreen cosmetic, the sunscreen is basically in the inner phase. During the application process, the first thing that contacts the skin surface is the water phase, that is, the outer phase, and there may be a demulsification process. If demulsification occurs during this process, the oil will overflow from the water, so there will be a large amount of oil and water on the skin surface. If the water contacts the skin first, the oil will not spread evenly on the surface of the water, resulting in uneven spreading of the sunscreen on the skin. However, the emulsifier composition provided by the present invention improves the emulsification effect of the water-in-oil system, that is, the emulsification particle size becomes smaller and the interfacial film strength between oil and water is higher, so it is not easy to demulsify during the application process. Furthermore, the skin surface continues to exist in the form of microemulsion and spreads evenly. At this time, the sunscreen will also spread evenly on the skin surface with the microemulsion, thereby improving the sunscreen value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 This is the emulsification particle size diagram of Embodiment 1 of the present invention;

[0019] Figure 2 This is the emulsification particle size diagram of Comparative Example 3 of the present invention. Detailed implementation manners

[0020] Next, in combination with the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0022] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0023] It should be further understood that the term "and / or" used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0024] In addition, terms such as "substantially" and "essentially" are intended to indicate that the relevant content does not require absolute precision, but there can be a certain deviation. For example: "substantially equal" does not merely mean absolute equality. Since it is difficult to achieve absolute "equality" during actual production and operation processes, there is generally a certain deviation. Therefore, in addition to absolute equality, "substantially equal" also includes the above-mentioned situation of having a certain deviation. Taking this as an example, in other cases, unless otherwise specified, terms such as "substantially" and "essentially" have meanings similar to the above.

[0025] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "install", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Most of the currently applied sunscreens are basically oils and fats. If an oil-in-water (i.e., sunscreen) system is used and added to products such as cosmetics that can be applied to sunscreen, in the oil-in-water sunscreen cosmetics, the sunscreens are basically in the inner phase. During the application process, the first thing to contact the skin surface is the water phase, and there may be a demulsification process. If demulsification occurs during this process, the oil will overflow from the water, so there will be a large amount of oil and water on the skin surface. And if the water contacts the skin first, the oil will spread unevenly on the surface of the water, making the sunscreen spread unevenly on the skin.

[0027] Film-forming agents generally make sunscreen cosmetics spread evenly on the skin; polar oils have a similar structure to sunscreens and act together with sunscreens; in addition, related active substances have a soothing effect on the skin and inhibit the generation of skin erythema. Now, many sunscreen cosmetics achieve the purpose of enhancing the sun protection value by improving the composition or content of film-forming agents and polar oils.

[0028] However, due to factors such as material research, the various combinations of existing related active substances do not significantly enhance the sun protection value, and film-forming agents and polar oils have a greater impact on the usability, and the usability is generally sticky and greasy. Therefore, the present invention starts from emulsifiers, hoping to improve the emulsification effect of the oil-in-water system, so that the sunscreen can spread evenly on the skin surface, thereby improving the sun protection value.

[0029] The present invention is realized as follows: providing an emulsifier composition for enhancing the sun protection value, which includes the following components: peg-4 polyglyceryl-2 stearate, potassium cetyl phosphate, and cetearyl alcohol.

[0030] Among them, in order to ensure the emulsification effect of the emulsifier composition, based on the percentage by mass of the total mass of the cosmetics, the content of peg-4 polyglyceryl-2 stearate is 1-3%; the content of potassium cetyl phosphate is 0.1-1%; the content of cetearyl alcohol is 0.1-2%.

[0031] Correspondingly, the present invention also provides a sunscreen cosmetic added with the above emulsifier composition, which also includes the following components: peg-4 polyglyceryl-2 stearate, potassium cetyl phosphate, and cetearyl alcohol.

[0032] Among them, based on the total mass percentage of the sunscreen cosmetic, the content of PEG-4 polyglyceryl-2 stearate is 1-3%; the content of potassium cetyl phosphate is 0.1-1%; the content of cetearyl alcohol is 0.1-2%.

[0033] In order to further improve the emulsifying effect of the emulsifier composition, based on the total mass percentage of the sunscreen cosmetic, the content of PEG-4 polyglyceryl-2 stearate is 1-2%; the content of potassium cetyl phosphate is 0.5-1%; the content of cetearyl alcohol is 0.5-1.5%.

[0034] The emulsifier composition provided by the present invention improves the emulsifying effect of the oil-in-water system, so that the oil-in-water system will not break emulsion during the application process, and then continues to exist in the form of emulsion on the surface of the skin and spreads evenly. At this time, the sunscreen agent will also spread evenly on the skin surface with the emulsion, further improving the sun protection value.

[0035] The following is illustrated with specific examples.

[0036] Example 1

[0037] To verify the specific synergistic effect of the emulsifier composition of the present invention on the sun protection value, in this example, based on the sunscreen cosmetic, the emulsifier composition of the present invention is added.

[0038] That is, in the sunscreen agent, emollient, film-forming agent, thickener, humectant, preservative, fragrance, lubricant aid and water, the emulsifier composition of the present invention is added. The specific components are as follows in the table:

[0039] Table 1 Specific components and mass percentage table of each component

[0040]

[0041] Correspondingly, the preparation method of Example 1 is as follows:

[0042] S1. Add various raw materials belonging to the oil phase into the oil phase pot, heat to 80-85 °C, and stir to dissolve to form a homogeneous mixture;

[0043] S2. Add various raw materials belonging to the water phase into the emulsifying pot, heat to 75-85 °C, and stir to mix evenly;

[0044] S3. Slowly pump the oil phase in the oil phase pot into the emulsifying pot containing the water phase, keep the temperature at 70-75 °C for emulsification for 10 minutes;

[0045] S4. Then cool down to 40-50 °C, add raw materials such as fragrance and stir evenly, and finally stir slowly and cool to room temperature for discharging.

[0046] Example 2 and Example 3

[0047] Based on Example 1, the content of the emulsifier composition in the present invention was changed, while the other components remained unchanged (except water), and the preparation method was the same.

[0048] The specific contents are as follows:

[0049] Table 2 Specific components and mass percentages of each component in Example 2 and Example 3

[0050]

[0051] Comparative Examples 1 to 6

[0052] To further verify the synergistic effect of the emulsifier composition in the present invention on the sun protection factor, on the basis of Example 1, the emulsifier in the present invention was missing and replaced for comparison, while the other components (except water) and the preparation method were the same.

[0053] The specific settings are as follows:

[0054] Table 3 Emulsifier composition settings for Comparative Examples 1 to 6

[0055] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Behenyl Alcohol Polyether-20 - - - - - 1.8 PEG-4 Polyglycerol-2 Stearate - 2.8 1 - 1.8 - Potassium Cetyl Phosphate - - - 1 0.5 0.5 Cetearyl Alcohol - - 1.8 1.8 - 0.5

[0056] SPF detection and results

[0057] For Examples 1 to 3 and Comparative Examples 1 to 6, the SPF test was carried out by a standard method.

[0058] The specific results are as follows:

[0059] Table 4 SPF test result table

[0060]

[0061] As can be seen from the above table, the SPF values of Examples 1, 2 and 3 are all greater than those of Comparative Examples 1 - 6, which proves that the emulsifier composition of the present invention has a good synergistic effect on the sun protection factor. Among them, in Comparative Example 1, no emulsifier was added, so a stable emulsion could not be formed; in Comparative Examples 2 - 5, some components in the emulsifier composition of the present invention were missing, and their SPF values had a large gap compared with those of Examples 1 and 3, indicating that there is a synergistic effect among the components of the emulsifier composition of the present invention; behenyl polyether - 20 is a commonly used emulsifier component. When behenyl polyether - 20 replaced PEG - 4 polyglycerol - 2 stearate in Example 1 compared with Comparative Example 6, the SPF value gap between Example 1 and Comparative Example 6 was large, thus proving the synergistic effect of the emulsifier composition of the present invention on the sun protection factor.

[0062] In addition, referring to Figure 1 and Figure 2 , Figure 1It is the emulsification particle size diagram of Example 1 at 2.0 μm; Figure 2 It is the emulsification particle size diagram of Comparative Example 3 at 2.0 μm; Figure 1 The emulsification particle size range in it is about 0.5 - 1.5 μm, and as can be seen from the figure, the emulsification particles of Example 1 are smaller and their particle size distribution range is relatively uniform; Figure 2 The emulsification particle size range in it is about 1 - 6 μm, and as can be seen from the figure, the emulsification particles of Comparative Example 3 are generally larger and their particle size distribution range is relatively dispersed. Therefore, it is not difficult to see that the emulsifier composition provided by Example 1 has better emulsification effect, thus reducing the possibility of demulsification occurring during the application of the oil-in-water system, and further ensuring that the sunscreen can be evenly spread on the skin of the user, achieving the effect of enhancing the sun protection value.

[0063] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An emulsifier composition for enhancing the sun protection value, which is used in oil-in-water sunscreen cosmetics, and is characterized in that, It comprises the following components: peg-4 polyglyceryl-2 stearate, potassium cetyl phosphate and cetearyl alcohol; Based on the total mass percentage of the composition, the content of peg-4 polyglyceryl-2 stearate is 1-3%, the content of potassium cetyl phosphate is 0.1-1%, and the content of cetearyl alcohol is 0.1-2%.

2. An oil-in-water system sunscreen cosmetic, characterized in that: It contains the following components: peg-4 polyglyceryl-2 stearate, potassium cetyl phosphate and cetearyl alcohol; Based on the total mass percentage of the sunscreen cosmetic, the content of peg-4 polyglyceryl-2 stearate is 1-3%, the content of potassium cetyl phosphate is 0.1-1%, and the content of cetearyl alcohol is 0.1-2%.

3. The oil-in-water sunscreen cosmetic according to claim 2, characterized in that: Based on the total mass percentage of the sunscreen cosmetic, the content of peg-4 polyglyceryl-2 stearate is 1-2%, the content of potassium cetyl phosphate is 0.5-1%, and the content of cetearyl alcohol is 0.5-1.5%.

4. The oil-in-water sunscreen cosmetic according to claim 2 or 3, characterized in that: Based on the total mass percentage of the sunscreen cosmetic, it also includes 0.02% of EDTA-2Na, 5.0% of butylene glycol, 0.4% of phenoxyethanol, 0.05% of xanthan gum, 5.0% of glycerin, 0.15% of carbomer, 1.0% of diisopropyl sebacate, 9.0% of ethylhexyl methoxycinnamate, 4.5% of ethylhexyl salicylate, 1.0% of ethylhexyl triazone, 0.5% of diethylamino hydroxybenzoyl hexyl benzoate, 2.5% of bis-ethylhexyloxyphenol methoxyphenyl triazine, 0.5% of VP / eicosene copolymer, 5.0% of cyclopentasiloxane, 0.08% of aminomethyl propanol, 0.12% of essence, 2.0% of methylene bis-benzotriazolyl tetramethylbutylphenol, a mixture of water, decyl glucoside, propylene glycol and xanthan gum, and the balance is water.

Images