Silicone oil-free PEG-free sunscreen liquid foundation and preparation method thereof

Abstract

The invention belongs to the technical field of cosmetics, and particularly relates to a silicone oil-free PEG-free sunscreen liquid foundation and a preparation method thereof. The silicone oil-free PEG-free sunscreen liquid foundation is prepared from the following components in percentage by mass: 13 to 20 percent of emollient, 6 to 10 percent of film-forming agent, 3 to 5 percent of emulsifying agent, 0.2 to 0.8 percent of thickening agent, 0.8 to 1.5 percent of chemical sunscreen agent, 15 to 20 percent of physical sunscreen agent, 0.6 to 1 percent of dispersing agent, 0.55 to 0.7 percent of antioxidant, 7 to 9 percent of coloring agent, 2 to 3 percent of filling agent, 6 to 10 percent of humectant, 0.5 percent of salt and the balance of water. The sunscreen liquid foundation is good in human skin feeling effect, stability and sunscreen effect, fresh and cool after being smeared, weak in viscosity after film forming, good in makeup maintaining effect, good in ductility, film forming property and lasting effect, free of obvious oil outlet phenomenon after centrifugation, high in in-vitro SPF value and UVAPF value, free of silicone oil and PEG, safe and non-irritant, meets the requirements of consumers for silicon-free and PEG-free products, and has good application prospects. The future cosmetic development trend and regulatory requirements are met.

Description

Technical Field

[0001] The invention belongs to the technical field of cosmetics, and in particular relates to a silicone-free and PEG-free sunscreen liquid foundation and a preparation method thereof. Background Art

[0002] In recent years, more and more consumers have begun to pay attention to their appearance, and the proportion of base makeup products has increased rapidly. Domestic regulations have gradually aligned with EU standards. The EU has announced that from June 6, 2027, leave-on cosmetics containing D4 (octamethylcyclotetrasiloxane), D5 (decamethylcyclopentasiloxane) or D6 (dodecamethylcyclohexasiloxane) with a concentration equal to or greater than 0.1% (w / w) shall not be marketed. PEG (polyethylene glycol) raw materials are widely used in cosmetics. In the process of producing polyethylene glycol (PEG), impurities such as 1,4-dioxane, ethylene glycol, ethylene oxide, and diethylene glycol are produced. These ingredients are not good, have physiological toxicity, are carcinogens, and can irritate the skin and cause skin allergies.

[0003] Silicone oil and PEG are commonly used raw materials for base makeup products. Currently, base makeup products on the market basically contain silicone oil and PEG emulsifiers, and sunscreen base makeup basically contains silicone oil or PEG, but its harm also makes consumers more concerned when choosing products. Therefore, developing a silicone-free and PEG-free sunscreen liquid foundation is a future development trend. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a silicone-free and PEG-free sunscreen foundation liquid and a preparation method thereof.

[0005] The object of the present invention is achieved in that:

[0006] A silicone-free and PEG-free sunscreen liquid foundation comprises the following components in percentage by mass: 13-20% of an emollient, 6-10% of a film former, 3-5% of an emulsifier, 0.2-0.8% of a thickener, 0.8-1.5% of a chemical sunscreen, 15-20% of a physical sunscreen, 0.6-1% of a dispersant, 0.55-0.7% of an antioxidant, 7-9% of a colorant, 2-3% of a filler, 6-10% of a humectant, 0.5% of salt, and the remainder being water.

[0007] Preferably, the silicone-free and PEG-free sunscreen foundation comprises the following components in percentage by mass: 17% emollient, 8% film former, 4.5% emulsifier, 0.5% thickener, 1.2% chemical sunscreen, 18% physical sunscreen, 0.8% dispersant, 0.6% antioxidant, 8% colorant, 2.5% filler, 7.5% humectant, 0.5% salt, and the balance water.

[0008] Preferably, the emollient is dibutyl adipate, dicaprylyl carbonate and C9-12 alkane, wherein the mass ratio of dibutyl adipate, dicaprylyl carbonate and C9-12 alkane is 1:2.5-4:5-8.

[0009] Preferably, the film former is C11-13 isoparaffin & trimethylsiloxy silicone resin.

[0010] Preferably, the emulsifier is sorbitan isostearate, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, polyglyceryl-2 oleate & polyhydroxystearic acid & polyglyceryl-2 stearate, wherein the mass ratio of each component is 1:2-3:2-6.

[0011] Preferably, the thickener is disteardimethylammonium hectorite.

[0012] Preferably, the chemical sunscreen is diethylaminohydroxybenzoyl hexyl benzoate.

[0013] Preferably, the physical sunscreen is titanium dioxide & aluminum hydroxide & stearic acid and zinc oxide & triethoxyoctylsilane, wherein the mass ratio of titanium dioxide & aluminum hydroxide & stearic acid to zinc oxide & triethoxyoctylsilane is 1:0.5-1.5.

[0014] Preferably, the dispersant is polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane.

[0015] Preferably, the antioxidant is tocopherol acetate and p-hydroxyacetophenone, wherein the mass ratio of tocopherol acetate to p-hydroxyacetophenone is 1:2.5-10.

[0016] Preferably, the colorant is CI 77891 & aluminum hydroxide & isopropyl titanium triisostearate, CI 77492 & isopropyl titanium triisostearate, CI 77491 & isopropyl titanium triisostearate and CI 77499 & isopropyl titanium triisostearate, wherein the mass ratio of each component is 293-393:46:8:3.

[0017] Preferably, the filler is mica, silica and vinyl dimethicone / polymethicone silsesquioxane cross-linked polymer, wherein the mass ratio of mica, silica and vinyl dimethicone / polymethicone silsesquioxane cross-linked polymer is 0.5-2:1:1.5-2.2.

[0018] Preferably, the moisturizing agent is glycerol and hexylene glycol, wherein the mass ratio of glycerol to hexylene glycol is 4 to 14:1.

[0019] Preferably, the salt is sodium chloride.

[0020] The present invention also discloses a method for preparing the silicone oil-free and PEG-free sunscreen liquid foundation, comprising the following steps:

[0021] (1) Pretreatment: Use a grinder to grind the colorant and physical sunscreen into uniform powder respectively and set aside;

[0022] (2) heating water, salt, moisturizer and antioxidant p-hydroxyacetophenone to 75-85° C., dispersing them evenly and setting aside;

[0023] (3) After the emollient dibutyl adipate, dioctyl carbonate and chemical sunscreen are heated to 75-85° C. and completely dissolved, a film former, an emollient C9-12 alkane, an emulsifier, a thickener, an antioxidant tocopherol acetate and a dispersant are added, and the mixture is stirred and homogenized. The crushed colorant, filler and crushed sunscreen are added, and the mixture is stirred and homogenized. Under the stirring and homogenization condition, the uniformly dispersed raw materials in step (2) are added, and the stirring is continued to be uniform to complete the emulsification;

[0024] (4) cooling and evacuating the mixture to obtain a silicone-free and PEG-free sunscreen liquid foundation.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The sunscreen liquid foundation of the present invention is refreshing after application, has weak viscosity after film formation, has good makeup-lasting effect, has good ductility, film-forming property and durability, that is, has a strong human skin feel, has no obvious oily phenomenon after centrifugation, and has strong stability.

[0027] 2. The sunscreen liquid foundation of the present invention has a high external SPF value and UVAPF value, that is, a strong sunscreen effect, and does not contain silicone oil and PEG, is safe and non-irritating, meets consumers' demand for silicone-free and PEG-free products, and is in line with future cosmetic development trends and regulatory requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The centrifugation results of the liquid foundations of Examples 1 to 3 of the present invention are shown.

[0029] Figure 2 This is a graph showing the centrifugation results of the liquid foundations of Comparative Examples 1 to 2 of the present invention. DETAILED DESCRIPTION

[0030] The present invention is described in more detail below through specific implementation modes.

[0031] The present invention sets Examples 1 to 3 and Comparative Examples 1 to 2, and the feed ratios are shown in Table 1:

[0032] Table 1 Formulas of Examples 1 to 3 and Comparative Examples 1 to 2

[0033]

[0034]

[0035] Note: The raw materials in Table 1 are connected by “&”, which means that the component is a composite raw material and is a whole.

[0036] The preparation methods of Examples 1 to 3 include the following steps:

[0037] (1) Pretreatment: Use a grinder to grind the phase C colorant and phase E physical sunscreen into uniform powder for later use;

[0038] (2) Heat the water, salt, humectant and antioxidant p-hydroxyacetophenone in phase F to 80° C., disperse them evenly and set aside;

[0039] (3) After the phase A emollients dibutyl adipate, dicaprylyl carbonate and chemical sunscreen are heated to 80° C. and completely dissolved, the phase B film former, emollient C9-12 alkane, emulsifier, thickener, antioxidant tocopherol acetate and dispersant are added, and the mixture is stirred and homogenized. The crushed phase C colorant, phase D filler and phase E sunscreen are added, and the mixture is stirred and homogenized. Under the stirring and homogenization condition, the evenly dispersed phase F in step (2) is added, and the stirring is continued to be evenly completed to complete the emulsification;

[0040] (4) cooling and evacuating the mixture to obtain a silicone-free and PEG-free sunscreen liquid foundation.

[0041] The preparation method of Comparative Examples 1 to 2 comprises the following steps:

[0042] (1) Pretreatment: Use a grinder to grind the phase C colorant and phase E physical sunscreen into uniform powder for later use;

[0043] (2) Heat the water, salt, humectant and antioxidant p-hydroxyacetophenone in phase F to 80° C., disperse them evenly and set aside;

[0044] (3) After the phase A emollients dibutyl adipate, dicaprylyl carbonate and chemical sunscreen are heated to 80° C. and completely dissolved, the phase B film former, emollients C9-12 alkane and isododecane, emulsifier, thickener, antioxidant tocopherol acetate and dispersant are added, and the mixture is stirred and homogenized. The crushed phase C colorant, phase D filler and phase E sunscreen are added, and the mixture is stirred and homogenized. Under the stirring and homogenization condition, the evenly dispersed phase F in step (2) is added, and the stirring is continued to be evenly mixed to complete the emulsification;

[0045] (4) cooling and evacuating the mixture to obtain a silicone-free and PEG-free sunscreen liquid foundation.

[0046] Performance Testing

[0047] 1. Human skin feel test

[0048] 25 volunteers aged 20 to 45 were randomly selected, including 20 females and 5 males, and the foundation liquids of Examples 1 to 3 and Comparative Examples 1 to 2 were used for makeup. After 8 hours of daily activities, the ductility, film-forming property, durability and refreshing feeling of each foundation liquid were evaluated. The scoring standard was divided into five grades: A, B, C, D, and E, with grade A being the best and grade E being the worst. The skin feel test grade of each foundation liquid was the average of the scores of all volunteers, and the test results are shown in Table 2:

[0049] Table 2 Skin feel test grades of liquid foundation of Examples 1 to 3 and Comparative Examples 1 to 2

[0050] Ductility Film forming properties Durability 8 hours Refreshing feeling Example 1 B A B A Example 2 A A A A Example 3 A B A B Comparative Example 1 B B C C Comparative Example 2 C B C C

[0051] It can be seen from the test results in Table 2 that compared with the liquid foundations of Comparative Examples 1 to 2, the liquid foundations of Examples 1 to 3 of the present invention are more refreshing after application, have less stickiness after film formation, and have better makeup-lasting effect. In addition, the liquid foundation of the present invention does not contain silicone oil and PEG, and is safe and non-irritating.

[0052] 2. Centrifugal stability test

[0053] The foundation liquids of Examples 1 to 3 and Comparative Examples 1 to 2 were centrifuged at a speed of 2000 r / min for 30 min. The centrifugal results are as follows: Figures 1-2 shown.

[0054] Depend on Figures 1-2 It can be seen that the liquid foundations of comparative examples 1 to 2 are obviously oily, while the liquid foundations of embodiments 1 to 3 of the present invention are not obviously oily, and their stability is better than that of the comparative examples.

[0055] 3. Sunscreen effect test

[0056] Referring to the ISO 24443:2021 in vitro sunscreen test method, Labsphere's UV-2000S was used to test the in vitro SPF values ​​and UVAPF values ​​of the foundation liquids of Examples 1 to 3 and Comparative Examples 1 to 2. The test results are shown in Table 3:

[0057] Table 3 In vitro SPF and UVAPF values ​​of foundation liquids of Examples 1 to 3 and Comparative Examples 1 to 2

[0058] SPF UVAPF Example 1 55.84 23.59 Example 2 60.85 24.69 Example 3 56.46 21.56 Comparative Example 1 53.41 19.85 Comparative Example 2 50.77 20.21

[0059] It can be seen from the test data in Table 3 that the in vitro SPF values ​​and UVAPF values ​​of the foundation liquids of Examples 1 to 3 of the present invention are higher than those of the foundation liquids of Comparative Examples 1 to 2, that is, the sun protection effect of the foundation liquids of Examples 1 to 3 of the present invention is better than that of the comparative example.

[0060] Based on the above test results, it can be seen that the sunscreen foundation prepared in Examples 1 to 3 using emollients dibutyl adipate, dicaprylyl carbonate and C9-12 alkane, and emulsifiers sorbitan isostearate, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, polyglyceryl-2 oleate & polyhydroxystearic acid & polyglyceryl-2 stearate have strong skin feel, stability and sunscreen effect.

[0061] The liquid foundation prepared in Comparative Example 1 using emollients dibutyl adipate, dicaprylyl carbonate and C9-12 alkane, and emulsifiers sorbitan isostearate, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, and sorbitan sesquioleate has moderate ductility and film-forming properties, but its durability and stickiness are poor, there is obvious oil secretion after centrifugation, and the sun protection effect is also poor.

[0062] The liquid foundation prepared in Comparative Example 2 using emollients dibutyl adipate, dicaprylyl carbonate, C9-12 alkane and isododecane, and emulsifiers sorbitan isostearate, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, and sorbitan sesquioleate has moderate film-forming properties, poor extensibility, durability, and stickiness, obvious oil secretion after centrifugation, and poor sunscreen effect.

[0063] The above embodiments are merely explanations of the present invention and are not limitations of the present invention. For those skilled in the art, any obvious modifications made thereto without departing from the principles and spirit of the present invention should be considered to be included in the scope of protection of the claims of the present invention.

Claims

1. A silicone-free and PEG-free sunscreen liquid foundation, characterized in that: The invention comprises the following components in percentage by mass: 13-20% of moisturizer, 6-10% of film former, 3-5% of emulsifier, 0.2-0.8% of thickener, 0.8-1.5% of chemical sunscreen, 15-20% of physical sunscreen, 0.6-1% of dispersant, 0.55-0.7% of antioxidant, 7-9% of colorant, 2-3% of filler, 6-10% of humectant, 0.5% of salt and the balance of water.

2. The silicone-free PEG-free sunscreen liquid foundation according to claim 1, characterized in that: The invention comprises the following components in percentage by weight: 17% of emollient, 8% of film former, 4.5% of emulsifier, 0.5% of thickener, 1.2% of chemical sunscreen, 18% of physical sunscreen, 0.8% of dispersant, 0.6% of antioxidant, 8% of colorant, 2.5% of filler, 7.5% of humectant, 0.5% of salt and the balance of water.

3. The silicone-free and PEG-free sunscreen liquid foundation according to claim 1 or 2, characterized in that: The emollient is dibutyl adipate, dioctyl carbonate and C9-12 alkane, wherein the mass ratio of dibutyl adipate, dioctyl carbonate and C9-12 alkane is 1:2.5-4:5-8; The emulsifiers are sorbitan isostearate, polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate, polyglyceryl-2 oleate & polyhydroxystearic acid & polyglyceryl-2 stearate, wherein the mass ratio of each component is 1:2-3:2-6.

4. The silicone-free and PEG-free sunscreen liquid foundation according to claim 3, characterized in that: The film former is C11-13 isoparaffin & trimethylsiloxy silicone resin, the thickener is disteardimonium hectorite, the dispersant is polyglycerol-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, and the salt is sodium chloride.

5. The silicone-free PEG-free sunscreen liquid foundation according to claim 4, characterized in that: The chemical sunscreen is diethylaminohydroxybenzoyl hexyl benzoate; The physical sunscreen is titanium dioxide, aluminum hydroxide, stearic acid and zinc oxide, triethoxyoctylsilane, wherein the mass ratio of titanium dioxide, aluminum hydroxide, stearic acid to zinc oxide, triethoxyoctylsilane is 1:0.5-1.

5.

6. The silicone-free and PEG-free sunscreen liquid foundation according to claim 5, characterized in that: The antioxidants are tocopherol acetate and p-hydroxyacetophenone, wherein the mass ratio of tocopherol acetate to p-hydroxyacetophenone is 1:2.5-10; The colorants are CI 77891 & aluminum hydroxide & isopropyl titanium triisostearate, CI 77492 & isopropyl titanium triisostearate, CI 77491 & isopropyl titanium triisostearate and CI 77499 & isopropyl titanium triisostearate, wherein the mass ratio of each component is 293-393:46:8:

3.

7. The silicone-free and PEG-free sunscreen liquid foundation according to claim 6, characterized in that: The filler is mica, silica and vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer, wherein the mass ratio of mica, silica and vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane crosslinked polymer is 0.5-2:1:1.5-2.

2.

8. The silicone-free and PEG-free sunscreen liquid foundation according to claim 7, characterized in that: The moisturizing agents are glycerol and hexylene glycol, wherein the mass ratio of glycerol to hexylene glycol is 4-14:

1.

9. A method for preparing a silicone-free and PEG-free sunscreen foundation liquid as claimed in claim 8, characterized in that: The steps include: (1) Pretreatment: Use a grinder to grind the colorant and physical sunscreen into uniform powder respectively and set aside; (2) heating water, salt, moisturizer and antioxidant p-hydroxyacetophenone to 75-85° C., dispersing them evenly and setting aside; (3) After the emollient dibutyl adipate, dioctyl carbonate and chemical sunscreen are heated to 75-85° C. and completely dissolved, a film former, an emollient C9-12 alkane, an emulsifier, a thickener, an antioxidant tocopherol acetate and a dispersant are added, and the mixture is stirred and homogenized. The crushed colorant, filler and crushed sunscreen are added, and the mixture is stirred and homogenized. Under the stirring and homogenization condition, the uniformly dispersed raw materials in step (2) are added, and the stirring is continued to be uniform to complete the emulsification; (4) cooling and evacuating the mixture to obtain a silicone-free and PEG-free sunscreen liquid foundation.

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