W / O / W liquid foundation and preparation method thereof

Abstract

The invention relates to the technical field of cosmetics, in particular to a W / O / W liquid foundation and a preparation method thereof. The W / O / W liquid foundation comprises a first water phase, an oil phase and a second water phase, and the first water phase is prepared from, by mass, 5%-9% of water, 1.5%-3% of polyhydric alcohol, 0.05%-0.2% of inorganic salt and 0.1%-0.2% of preservative; the oil phase comprises the following components in percentage by weight: 1%-2% of a W / O emulsifier, 0.1%-0.3% of a thickening agent, 6%-10% of grease and 3%-10% of toner; the second water phase comprises 0.18%-0.25% of a thickening agent, 2.5%-6% of an O / W emulsifier, 3%-6% of polyol, 0.1%-0.2% of a pH regulator, 0.2%-0.5% of a preservative and 55%-75% of water. The W / O / W liquid foundation has good stability.

Description

Technical Field

[0001] The present application relates to the technical field of cosmetics, and in particular to a W / O / W liquid foundation and a preparation method thereof. Background Art

[0002] In the field of cosmetics, liquid foundation is an important base makeup product, and its performance is directly related to the consumer's usage experience and satisfaction. Most current liquid foundations are single-layer emulsion systems, such as W / O type (oil-in-water) liquid foundation and O / W type (water-in-oil) liquid foundation. Although W / O type liquid foundation has good water resistance and durability, its external phase is an oil phase, which may cause a greasy feeling on the skin, and the powder is easy to aggregate and settle in the oil phase, affecting the stability and use effect of the product. O / W type liquid foundation has a better refreshing feeling, but it is not waterproof and has weak makeup lastingness, and it is easy to come off in high temperature and high humidity environments, which is difficult to meet consumers' demand for multifunctional liquid foundation. In addition, these systems have certain limitations in terms of concealing power and other aspects.

[0003] W / O / W (water-in-oil-in-water) liquid foundations offer a perfect balance of the advantages and disadvantages of both W / O and O / W formulations, offering a light, translucent feel, a moisturizing and refreshing feel, water- and sweat-resistant properties, easy application, and resistance to fading. W / O / W (water-in-oil-in-water) multi-emulsion systems, with their unique "two-membrane, three-phase" structure, can simultaneously encapsulate both hydrophobic and hydrophilic active ingredients, achieving synergistic delivery and sustained release of active ingredients. This has become a research hotspot for liquid foundations and other cosmetics.

[0004] However, W / O / W liquid foundation has an inherent defect of low stability. Therefore, how to improve the stability of W / O / W liquid foundation is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] Based on this, one or more embodiments of the present application provide a W / O / W liquid foundation and a preparation method thereof, including the following technical solutions:

[0006] One or more embodiments of the present application provide a W / O / W liquid foundation, the W / O / W liquid foundation comprising a first aqueous phase, an oil phase, and a second aqueous phase, based on the mass proportion of each component in the W / O / W liquid foundation,

[0007] The first aqueous phase includes the following components:

[0008]

[0009] The oil phase includes the following ingredients:

[0010]

[0011]

[0012] The second aqueous phase includes the following components:

[0013]

[0014] In some embodiments of the present application, the W / O / W liquid foundation satisfies one or more of the following conditions:

[0015] (1) The polyols in the first aqueous phase and the second aqueous phase independently include one or more of dipropylene glycol, butylene glycol, 1,3-propanediol, glycerol and pentanediol;

[0016] (2) the W / O emulsifier in the oil phase includes one or more of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, polyglyceryl-3 dipolyhydroxystearate, polyglyceryl-6 polyricinoleate, polyglyceryl-3 polyricinoleate, and polyglyceryl-3 diisostearate; and,

[0017] (3) The O / W emulsifier in the second aqueous phase includes one or more of polyglyceryl-10 stearate, polyglyceryl-10 dioleate, polyglyceryl-10 laurate, polyglyceryl-10 myristate and glyceryl stearate citrate.

[0018] In some embodiments of the present application, the polyol in the first aqueous phase and the second aqueous phase is dipropylene glycol;

[0019] The W / O emulsifier in the oil phase is two or more of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, polyglyceryl-2 dipolyhydroxystearate and polyglyceryl-3 diisostearate;

[0020] The O / W emulsifier in the second aqueous phase is polyglyceryl-10 stearate.

[0021] In some embodiments of the present application, the inorganic salt in the first aqueous phase is an alkali metal salt;

[0022] Optionally, the salt in the first aqueous phase includes one or more of magnesium salt and sodium salt;

[0023] Optionally, the salt in the first aqueous phase includes one or more of sulfate and hydrochloride.

[0024] In some embodiments of the present application, the W / O / W liquid foundation satisfies one or more of the following conditions:

[0025] 1) the thickener in the second aqueous phase comprises one or more of acrylates / C10-30 alkyl acrylate crosspolymer, carbomer 980 and xanthan gum; and,

[0026] 2) The thickener in the oil phase is one or more of isododecane / disteardimethylamine hectorite / propylene carbonate, cyclopentasiloxane / disteardimethylamine hectorite / propylene carbonate, and silica dimethyl silylate.

[0027] In some embodiments of the present application, the W / O / W liquid foundation satisfies one or more of the following conditions:

[0028] (A) the preservatives in the first aqueous phase and the second aqueous phase each independently include one or more of methylparaben, phenoxyethanol, and ethylhexylglycerin;

[0029] (B) the oil in the oil phase comprises one or more of diethylhexyl carbonate, dimethicone, ethylhexyl palmitate, caprylic / capric triglyceride, propylene glycol dicaprylate, dicaprylyl carbonate, cyclopentasiloxane, PEG / PPG-18 / 18 dimethicone, and caprylyl methicone;

[0030] (C) the toner in the oil phase comprises one or more of CI77891 / isopropyl titanium triisostearate / polydimethylsiloxane / alumina, CI77492 / isopropyl titanium triisostearate / polydimethylsiloxane, CI77491 / isopropyl titanium triisostearate / polydimethylsiloxane, and CI77499 / isopropyl titanium triisostearate / polydimethylsiloxane; and

[0031] (D) The pH adjuster in the second aqueous phase includes one or more of triethanolamine and arginine.

[0032] One or more embodiments of the present application provide a method for preparing the W / O / W liquid foundation, the method comprising the following steps:

[0033] Prepare the first aqueous phase, oil phase and second aqueous phase respectively using the ingredients; and

[0034] The first aqueous phase, the oil phase and the second aqueous phase are mixed to prepare a W / O / W liquid foundation.

[0035] In some embodiments of the present application, the step of preparing the first aqueous phase comprises: mixing an inorganic salt, a polyol, and water, heating and stirring, cooling, and adding a preservative to the resulting mixture to prepare the first aqueous phase;

[0036] Optionally, the step of preparing the first aqueous phase satisfies one or more of the following conditions:

[0037] A) heating and stirring at a temperature of 85°C-90°C; and

[0038] B) adding a preservative while the temperature of the resulting mixture is between 40°C and 50°C.

[0039] In some embodiments of the present application, the step of preparing the oil phase includes: mixing the ingredients, heating and stirring, and homogenizing to prepare the oil phase;

[0040] Optionally, the step of preparing the oil phase satisfies one or more of the following conditions:

[0041] C) heating and stirring at a temperature of 80°C-85°C; and

[0042] D) The homogenization time is 2 min to 4 min.

[0043] In some embodiments of the present application, the step of preparing the second aqueous phase includes: mixing an emulsifier, a thickener, a polyol, and water, heating and stirring, homogenizing, and sequentially adding a pH adjuster and a preservative to prepare the second aqueous phase;

[0044] Optionally, the step of preparing the second aqueous phase satisfies one or more of the following conditions:

[0045] E) heating and stirring at a temperature of 80°C-85°C;

[0046] F) The homogenization time is 2-4 minutes;

[0047] G) adding a pH adjuster under the condition that the temperature of the homogenized product is below 70° C.; and

[0048] H) adding a preservative while maintaining the mixture temperature at 40°C to 50°C after the addition of the pH adjuster.

[0049] In some embodiments of the present application, the preparation method comprises:

[0050] Step (1), pouring the first aqueous phase into the oil phase under stirring, continuing stirring, and homogenizing to prepare W / O colostrum; and

[0051] Step (2), pouring the W / O colostrum into the second aqueous phase under stirring, stirring, and homogenizing to prepare a W / O / W liquid foundation;

[0052] Optionally, the preparation method satisfies one or more of the following conditions:

[0053] 1) In step (1), the stirring speed is 600 rpm-800 rpm, and the stirring time is continued for 8 min-12 min;

[0054] J) In step (1), the homogenization conditions include: performing the homogenization at a speed of 8000 rpm to 12000 rpm for 3 min to 4 min;

[0055] K) in step (2), during the process of pouring the W / O colostrum into the second aqueous phase, the temperature is controlled at 20° C. to 28° C. and the rotation speed is controlled at 400 rpm to 600 rpm;

[0056] L) in step (2), the stirring time is 2 min to 4 min; and

[0057] M) In step (2), the homogenization treatment conditions include: performing the homogenization treatment at a rotation speed of 6000 rpm-8000 rpm for 3 min-4 min.

[0058] Compared with conventional technology, the embodiments of the present application provide a W / O / W liquid foundation with a specific formula, which has good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application and to more fully understand the present application and its beneficial effects, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0060] Figure 1 This is a microscope image of the W / O / W liquid foundation prepared in Example 3. DETAILED DESCRIPTION

[0061] Below in conjunction with accompanying drawing, embodiment and example, the application is described in further detail.It should be understood that these embodiment and example are only used to illustrate the application and are not used to limit the scope of the application, and the purpose of providing these embodiment and example is to make the understanding of the disclosure of the application more thorough and comprehensive.It should also be understood that the application can be implemented in many different forms and is not limited to the embodiment and example described herein. Those skilled in the art can make various changes or modifications without violating the connotation of the application, and the equivalent form obtained also falls within the protection scope of the application.In addition, in the description below, a large amount of specific details are given in order to provide a more complete understanding of the application.It should be understood that the application can be implemented without one or more of these details.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing embodiments and examples only and are not intended to limit this application.

[0063] the term

[0064] Unless otherwise specified or incompatible herewith, the terms and phrases used herein shall have the following meanings:

[0065] The terms "and / or", "or / and", and "and / or" used herein include any one of two or more related listed items, and also include any and all combinations of the related listed items, wherein the arbitrary and all combinations include any combination of two related listed items, any more related listed items, or all related listed items. It should be noted that when at least three items are connected by at least two conjunctions selected from "and / or", "or / and", and "and / or", it should be understood that in this application, the technical solution undoubtedly includes technical solutions connected by "logical and" and also undoubtedly includes technical solutions connected by "logical or". For example, "A and / or B" includes three parallel solutions of A, B and A+B. For example, the technical solution of "A, and / or, B, and / or, C, and / or, D" includes any one of A, B, C, and D (that is, the technical solution of all being connected by "logical OR"), and also includes any and all combinations of A, B, C, and D, that is, the combination of any two or any three of A, B, C, and D, and also includes the four-item combination of A, B, C, and D (that is, the technical solution of all being connected by "logical AND").

[0066] In this application, "plurality", "multiple", "multiple times", "multiples", etc., unless otherwise specified, refer to a quantity greater than or equal to 2. For example, "one or more" means one or more than or equal to two.

[0067] As used herein, "combination thereof", "any combination thereof", "any combination thereof" and the like include all suitable combinations of any two or more of the listed items.

[0068] Herein, the “suitable” mentioned in “suitable combination”, “suitable method”, “any suitable method”, etc. shall be based on the ability to implement the technical solution of this application, solve the technical problems of this application, and achieve the expected technical effects of this application.

[0069] Herein, "preferred", "better", "more preferred" and "suitable" are merely used to describe implementation methods or examples with better effects. It should be understood that they do not constitute limitations on the scope of protection of this application.

[0070] In this application, "further", "further", "particularly" and the like are used for descriptive purposes to indicate differences in content, but should not be understood as limiting the scope of protection of this application.

[0071] In this application, the terms "optionally," "optional," and "optional" mean optional or dispensable, i.e., they refer to either option being selected from two parallel options: "with" or "without." If a technical solution contains multiple "optional" clauses, each "optional" clause is independent unless otherwise specified and there are no contradictions or constraints.

[0072] In this application, the terms "first," "second," "third," "fourth," etc. in "the first aspect," "the second aspect," "the third aspect," "the fourth aspect," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or quantity, nor should they be understood as implicitly indicating the importance or quantity of the indicated technical features. Furthermore, "first," "second," "third," "fourth," etc. serve only as non-exhaustive enumeration and description, and should be understood not to constitute a closed-ended limitation on quantity.

[0073] In this application, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0074] In this application, when referring to a numerical interval (i.e., a numerical range), unless otherwise specified, the optional numerical distribution is considered continuous within the above numerical interval and includes the two numerical endpoints of the numerical range (i.e., the minimum and maximum values), as well as each numerical value between the two numerical endpoints. Unless otherwise specified, when a numerical interval refers only to integers within the numerical interval, it includes the two endpoint integers of the numerical range, as well as each integer between the two endpoints. In this article, it is equivalent to directly listing each integer, such as t is an integer selected from 1 to 10, indicating that t is any integer selected from the group of integers consisting of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10. In addition, when multiple ranges are provided to describe features or characteristics, these ranges can be merged. In other words, unless otherwise specified, the ranges disclosed herein should be understood to include any and all subranges included therein.

[0075] Unless otherwise specified, the temperature parameters in this application allow for both constant temperature treatment and temperature fluctuations within a certain temperature range. It should be understood that the constant temperature treatment allows for temperature fluctuations within the accuracy range of instrument control. Fluctuations within ranges such as ±5°C, ±4°C, ±3°C, ±2°C, and ±1°C are permitted.

[0076] In this application, % (w / w) and wt% both refer to weight percentage, % (v / v) refers to volume percentage, and % (w / v) refers to mass volume percentage.

[0077] All documents mentioned in this application are cited as references in this application, just as each document is cited as reference separately. Unless they conflict with the application purpose and / or technical solution of this application, the cited documents involved in this application are cited in their entirety and for all purposes. When cited documents are involved in this application, the definitions of relevant technical features, terms, nouns, phrases, etc. in the cited documents are also cited. When cited documents are involved in this application, the examples and preferred embodiments of the cited relevant technical features may also be incorporated into this application as references, but are limited to the ability to implement this application. It should be understood that when the cited content conflicts with the description in this application, the present application shall prevail or be adaptively amended according to the description in this application.

[0078] In a first aspect of an embodiment of the present application, a W / O / W liquid foundation is provided, wherein the W / O / W liquid foundation comprises a first aqueous phase, an oil phase, and a second aqueous phase, and the weight proportion of each component in the W / O / W liquid foundation is:

[0079] The first aqueous phase includes the following components:

[0080]

[0081] The oil phase includes the following ingredients:

[0082]

[0083] The second aqueous phase includes the following components:

[0084]

[0085] In the first aqueous phase of the present application, the water content is, for example, 5%, 6%, 7%, 8%, 9%, the polyol content is, for example, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, and the inorganic salt content is, for example, 0.05%, 0. .1%, 0.11%, 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17%, 0.18%, 0.19%, 0.2%, and the preservative content is, for example, 0.1%, 0.11%, 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17%, 0.18%, 0.19%, 0.2%.

[0086] In the oil phase of the present application, the content of the W / O emulsifier is, for example, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2%, and the content of the thickener is, for example, 0.1%, 0.11%, 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17%, 0.18%, 0.19%, or 0. The content of fat is, for example, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%; the content of color powder is, for example, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%.

[0087] In the second aqueous phase of the present application, the content of the thickener is, for example, 0.18%, 0.19%, 0.2%, 0.21%, 0.22%, 0.23%, 0.24%, and 0.25%, the content of the O / W emulsifier is, for example, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, and 6%, and the content of the polyol is, for example, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, and 6%. The content of the pH adjuster is, for example, 0.1%, 0.11%, 0.12%, 0.13%, 0.14%, 0.15%, 0.16%, 0.17%, 0.18%, 0.19%, and 0.2%; the content of the preservative is, for example, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, 0.45%, and 0.5%; and the content of water is, for example, 55%, 60%, 65%, 70%, and 75%.

[0088] The total amount of each component in the W / O / W liquid foundation of this application is 100%.

[0089] In some examples of the present application, the W / O / W liquid foundation satisfies one or more of the following conditions:

[0090] (1) The polyols in the first aqueous phase and the second aqueous phase independently include one or more of dipropylene glycol, butylene glycol, 1,3-propanediol, glycerol and pentanediol;

[0091] (2) the W / O emulsifier in the oil phase includes one or more of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, polyglyceryl-3 dipolyhydroxystearate, polyglyceryl-6 polyricinoleate, polyglyceryl-3 polyricinoleate, and polyglyceryl-3 diisostearate; and,

[0092] (3) The O / W emulsifier in the second aqueous phase includes one or more of polyglyceryl-10 stearate, polyglyceryl-10 dioleate, polyglyceryl-10 laurate, polyglyceryl-10 myristate and glyceryl stearate citrate.

[0093] In some examples of the present application, the polyol in the first aqueous phase and the second aqueous phase is dipropylene glycol;

[0094] The W / O emulsifier in the oil phase is two or more of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, polyglyceryl-2 dipolyhydroxystearate and polyglyceryl-3 diisostearate;

[0095] The O / W emulsifier in the second aqueous phase is polyglyceryl-10 stearate.

[0096] In some examples of the present application, the inorganic salt in the first aqueous phase is an alkali metal salt;

[0097] Optionally, the salt in the first aqueous phase includes one or more of magnesium salt and sodium salt;

[0098] Optionally, the salt in the first aqueous phase includes one or more of sulfate and hydrochloride.

[0099] In some examples of the present application, the W / O / W liquid foundation satisfies one or more of the following conditions:

[0100] 1) the thickener in the second aqueous phase comprises one or more of acrylates / C10-30 alkyl acrylate crosspolymer, carbomer 980 and xanthan gum; and,

[0101] 2) The thickener in the oil phase is one or more of isododecane / disteardimethylamine hectorite / propylene carbonate, cyclopentasiloxane / disteardimethylamine hectorite / propylene carbonate, and silica dimethyl silylate.

[0102] In some examples of the present application, the W / O / W liquid foundation satisfies one or more of the following conditions:

[0103] (A) the preservatives in the first aqueous phase and the second aqueous phase each independently include one or more of methylparaben, phenoxyethanol, and ethylhexylglycerin;

[0104] (B) the oil in the oil phase comprises one or more of diethylhexyl carbonate, dimethicone, ethylhexyl palmitate, caprylic / capric triglyceride, propylene glycol dicaprylate, dicaprylyl carbonate, cyclopentasiloxane, PEG / PPG-18 / 18 dimethicone, and caprylyl methicone;

[0105] (C) the toner in the oil phase comprises one or more of CI77891 / isopropyl titanium triisostearate / polydimethylsiloxane / alumina, CI77492 / isopropyl titanium triisostearate / polydimethylsiloxane, CI77491 / isopropyl titanium triisostearate / polydimethylsiloxane, and CI77499 / isopropyl titanium triisostearate / polydimethylsiloxane; and

[0106] (D) The pH adjuster in the second aqueous phase includes one or more of triethanolamine and arginine.

[0107] A second aspect of the embodiments of the present application provides a method for preparing the W / O / W liquid foundation, the method comprising the following steps:

[0108] Prepare the first aqueous phase, oil phase and second aqueous phase respectively using the ingredients; and

[0109] The first aqueous phase, the oil phase and the second aqueous phase are mixed to prepare a W / O / W liquid foundation.

[0110] In some examples of the present application, the step of preparing the first aqueous phase includes: mixing an inorganic salt, a polyol, and water, heating and stirring, cooling, and adding a preservative to the resulting mixture to prepare the first aqueous phase;

[0111] Optionally, the step of preparing the first aqueous phase satisfies one or more of the following conditions:

[0112] A) the temperature of heating and stirring is 85°C-90°C (e.g., 85°C, 86°C, 87°C, 88°C, 89°C, 90°C); and,

[0113] B) adding a preservative when the temperature of the obtained mixture is 40°C to 50°C (for example, 40°C, 41°C, 42°C, 43°C, 44°C, or 45°C).

[0114] In some examples of the present application, the step of preparing the oil phase includes: mixing the ingredients, heating and stirring, and homogenizing to prepare the oil phase;

[0115] Optionally, the step of preparing the oil phase satisfies one or more of the following conditions:

[0116] C) the temperature of heating and stirring is 80° C.-85° C. (e.g., 80° C., 81° C., 82° C., 83° C., 84° C., 85° C.); and,

[0117] D) The homogenization time is 2 min to 4 min (for example, 2 min, 2.2 min, 2.4 min, 2.6 min, 2.8 min, 3 min, 3.2 min, 3.4 min, 3.6 min, 3.8 min, 4 min).

[0118] In some examples of the present application, the step of preparing the second aqueous phase includes: mixing an emulsifier, a thickener, a polyol, and water, heating and stirring, homogenizing, and sequentially adding a pH regulator and a preservative to prepare the second aqueous phase;

[0119] Optionally, the step of preparing the second aqueous phase satisfies one or more of the following conditions:

[0120] E) the temperature of heating and stirring is 80° C.-85° C. (e.g., 80° C., 81° C., 82° C., 83° C., 84° C., 85° C.);

[0121] F) the homogenization time is 2 min to 4 min (e.g., 2 min, 2.2 min, 2.4 min, 2.6 min, 2.8 min, 3 min, 3.2 min, 3.4 min, 3.6 min, 3.8 min, 4 min);

[0122] G) adding a pH adjuster while the temperature of the homogenized product is below 70°C (e.g., 65°C, 55°C, 50°C, 45°C, 40°C, 35°C, 30°C); and,

[0123] H) adding a preservative while maintaining the mixture temperature at 40°C to 50°C (e.g., 40°C, 41°C, 42°C, 43°C, 44°C, or 45°C).

[0124] In some examples of the present application, the preparation method includes:

[0125] Step (1), pouring the first aqueous phase into the oil phase under stirring, continuing stirring, and homogenizing to prepare W / O colostrum; and

[0126] Step (2), pouring the W / O colostrum into the second aqueous phase under stirring, stirring, and homogenizing to prepare a W / O / W liquid foundation;

[0127] Optionally, the preparation method satisfies one or more of the following conditions:

[0128] 1) In step (1), the stirring speed is 600 rpm-800 rpm (e.g., 600 rpm, 650 rpm, 700 rpm, 750 rpm, 800 rpm), and the stirring time is 8 min-12 min (e.g., 8 min, 9 min, 10 min, 11 min, 12 min);

[0129] J) In step (1), the homogenization conditions include: performing the homogenization at a speed of 8000 rpm-12000 rpm (e.g., 8000 rpm, 8500 rpm, 9000 rpm, 9500 rpm, 10000 rpm, 10500 rpm, 11000 rpm, 11500 rpm, 12000 rpm), and the homogenization time is 3 min-4 min (e.g., 3 min, 3.2 min, 3.4 min, 3.6 min, 3.8 min, 4 min);

[0130] K) in step (2), during the process of pouring the W / O colostrum into the second aqueous phase, the temperature is controlled to be 20° C.-28° C. (e.g., 20° C., 21° C., 22° C., 23° C., 24° C., 25° C., 26° C., 27° C., 28° C.) and the rotation speed is controlled to be 400 rpm-600 rpm (e.g., 400 rpm, 450 rpm, 500 rpm, 550 rpm, 600 rpm);

[0131] L) in step (2), the stirring time is 2 min to 4 min (e.g., 2 min, 2.2 min, 2.4 min, 2.6 min, 2.8 min, 3 min, 3.2 min, 3.4 min, 3.6 min, 3.8 min, 4 min); and,

[0132] M) In step (2), the homogenization conditions include: performing the homogenization at a speed of 6000 rpm-8000 rpm (for example, 6000 rpm, 6500 rpm, 7000 rpm, 7500 rpm, 8000 rpm) for 3 min-4 min (for example, 3 min, 3.2 min, 3.4 min, 3.6 min, 3.8 min, 4 min).

[0133] The embodiments of the present application will be described in detail below with reference to the examples. It should be understood that these examples are intended to illustrate the present application only and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are preferably referred to the guidance provided in the present application, and can also be based on the experimental manuals or conventional conditions in this area, or according to the conditions recommended by the manufacturer, or with reference to experimental methods known in the art.

[0134] In the following specific examples, the measured parameters of raw material components may have slight deviations within the range of weighing accuracy unless otherwise specified. For temperature and time parameters, acceptable deviations caused by instrument testing accuracy or operational accuracy are allowed.

[0135] Example 1 to Example 8

[0136] Examples 1 to 8 of the present application all provide a W / O / W liquid foundation and a preparation method thereof.

[0137] The W / O / W liquid foundation of each embodiment is composed of the raw materials shown in the following Table 1. The content of each raw material in the W / O / W liquid foundation is expressed in wt%.

[0138] Table 1 (Unit: wt%)

[0139]

[0140]

[0141] The preparation methods of the W / O / W liquid foundations in Examples 1 to 8 are as follows:

[0142] (1) Add the salt, polyol, and water in the first aqueous phase to a beaker, stir and heat to 85°C, then stir and cool to 45°C, add the preservative, stir to prepare the first aqueous phase, and cool to room temperature for use;

[0143] (2) Add all the raw materials of the oil phase into another beaker, stir and heat to 85°C, homogenize for 3 minutes to disperse evenly, stir to prepare the oil phase, and cool to room temperature for use;

[0144] (3) slowly pouring the first aqueous phase obtained in step (1) into the oil phase obtained in step (2) under stirring conditions, stirring at 800 rpm for 10 minutes, and homogenizing at 10,000 rpm for 3 minutes to prepare W / O colostrum;

[0145] (4) Pour the O / W emulsifier, thickener, polyol, and water in the second aqueous phase into a beaker, mix, and stir. Heat to 85°C, homogenize for 3 minutes to disperse evenly, stir and cool to below 70°C, add a pH adjuster, continue stirring and cool to 45°C, add a preservative, and stir evenly to prepare the second aqueous phase. Cool to room temperature for use;

[0146] (5) The W / O colostrum obtained in step (3) was slowly poured into the second aqueous phase obtained in step (4) at room temperature and a stirring speed of 600 rpm, stirred for 3 minutes, and homogenized at 7000 rpm for 3 minutes to prepare a W / O / W liquid foundation.

[0147] The W / O / W foundation prepared in Example 3 is shown in the microscope image. Figure 1 .Depend on Figure 1 As can be seen, the W / O emulsion droplets are dispersed in the aqueous phase, exhibiting a unique "two-membrane, three-phase" multi-compartmental structure characteristic of W / O / W multi-emulsions. The aqueous phase encapsulates functional ingredients such as moisturizing, whitening, and sunscreen, providing protection, sustained release, and enhanced penetration. The opaque, evenly dispersed black substance within the intermediate oil phase represents the powder. This structure provides the foundation with a certain degree of coverage while offering a diverse skin feel experience.

[0148] Example 9

[0149] This embodiment is a variation of the third embodiment, and the only difference from the third embodiment is that:

[0150] (1) In the first aqueous phase, sodium chloride is used as the inorganic salt instead of magnesium sulfate, and only methylparaben is used as the preservative;

[0151] (2) In the oil phase, only diethylhexyl carbonate is used as the oil, and cyclopentasiloxane / distearyl dimethylamine hectorite / propylene carbonate is used as the thickener instead of isododecane / distearyl dimethylamine hectorite / propylene carbonate;

[0152] (3) In the second aqueous phase, arginine is used as the pH regulator instead of triethanolamine, and methylparaben is used as the preservative only.

[0153] Example 10

[0154] This embodiment is a variation of embodiment 3, and the only difference from embodiment 3 is that magnesium chloride is used instead of magnesium sulfate.

[0155] Example 11

[0156] This embodiment is a variation of Example 3. The only difference from Example 3 is that the emulsifier in the oil phase is only polyglycerol-6 polyricinoleate.

[0157] Example 12

[0158] This embodiment is a variation of Example 3. The only difference from Example 3 is that the emulsifier in the second aqueous phase is polyglycerol-10 dioleate.

[0159] Example 13

[0160] This embodiment is a variation of embodiment 3, and the only difference from embodiment 3 is that the polyol in the first aqueous phase is propylene glycol.

[0161] Example 14

[0162] This embodiment is a variation of embodiment 3, and the only difference from embodiment 3 is that the polyol in the second aqueous phase is propylene glycol.

[0163] Example 15

[0164] This embodiment is a variation of embodiment 3. The only difference from embodiment 3 is that the thickener in the oil phase is silica dimethyl silylate instead of isododecane / distearyl dimethylamine hectorite / propylene carbonate.

[0165] Comparative Example 1

[0166] This comparative example provides a W / O type liquid foundation and a preparation method thereof.

[0167] The W / O type liquid foundation is composed of the raw materials shown in the table below.

[0168] Table 2 (content unit: wt%)

[0169]

[0170] The preparation method of this W / O type liquid foundation is as follows:

[0171] (1) Add all the materials of the aqueous phase into a beaker, stir and heat to 85°C, then stir and cool to 45°C, add the preservative, stir to prepare the aqueous phase, and cool to room temperature for use;

[0172] (2) Add the oil phase materials into another beaker, stir and heat to 85°C, homogenize for 3 minutes to disperse evenly, stir to prepare the oil phase, and cool to room temperature for use;

[0173] (3) The aqueous phase obtained in step (1) was slowly poured into the oil phase obtained in step (2) at room temperature and a stirring speed of 600 rpm, stirred for 10 minutes, and homogenized at 9000 rpm for 3 minutes to prepare a W / O type foundation liquid.

[0174] Comparative Example 1 is compared with the embodiment. Comparative Example 1 is a W / O emulsion system with the same powder content and an oil-water ratio similar to that of the embodiment.

[0175] Comparative Example 2 to Comparative Example 3

[0176] Comparative Example 2 and Comparative Example 3 respectively provide an O / W liquid foundation and a preparation method thereof.

[0177] O / W liquid foundation consists of the ingredients shown in the table below.

[0178] Table 3 (content unit: wt%)

[0179]

[0180] The preparation method of this O / W type liquid foundation is as follows:

[0181] (1) Mix all the materials in the aqueous phase and heat them to 85°C with stirring. Homogenize for 3 minutes to disperse them evenly. Stir and cool to below 70°C. Add triethanolamine. Continue stirring and cool to 45°C. Add preservatives and stir evenly. Cool to room temperature for use.

[0182] (2) Add the oil phase materials into another beaker, stir and heat to 85°C, homogenize for 3 minutes to disperse evenly, stir and cool to room temperature for use;

[0183] (3) The oil phase obtained in step (2) was slowly poured into the aqueous phase solution obtained in step (1) at room temperature and a stirring speed of 600 rpm, stirred for 3 minutes, and homogenized at 9000 rpm for 3 minutes to obtain an O / W liquid foundation.

[0184] Comparative Example 2 is an O / W emulsion system having the same powder content and an oil-to-water ratio as the Example. Comparative Example 3 is an O / W emulsion system having twice the powder content and an oil-to-water ratio similar to the Example.

[0185] Comparative Example 4

[0186] This comparative example is a comparative example of Example 3, and the only difference from Example 3 is that no inorganic salt is added to the first aqueous phase.

[0187] Comparative Example 5

[0188] This comparative example is a comparative example of Example 3, and the only difference from Example 3 is that:

[0189] (1) In the oil phase, the amounts of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, polyglyceryl-2 dipolyhydroxystearate, and polyglyceryl-3 diisostearate are 2 wt%, 0.75 wt%, and 0.25 wt%, respectively;

[0190] (2) In the second aqueous phase, the amount of polyglyceryl-10 stearate is 7%.

[0191] Comparative Example 6

[0192] This comparative example is a comparative example of Example 3, and the only difference from Example 3 is that:

[0193] (1) In the oil phase, the amounts of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, polyglyceryl-2 dipolyhydroxystearate, and polyglyceryl-3 diisostearate are 0.9 wt%, 0.075 wt%, and 0.025 wt%, respectively;

[0194] (2) In the second aqueous phase, the amount of polyglyceryl-10 stearate is 1.5%.

[0195] Comparative Example 7

[0196] This comparative example is a comparative example of Example 3, and the only difference from Example 3 is that:

[0197] (1) In the first aqueous phase, the amount of dipropylene glycol is 1 wt%;

[0198] (2) In the second aqueous phase, the amount of dipropylene glycol used is 2 wt%.

[0199] Comparative Example 8

[0200] This comparative example is a comparative example of Example 3, and the only difference from Example 3 is that:

[0201] (1) In the first aqueous phase, the amount of dipropylene glycol is 4 wt%;

[0202] (2) In the second aqueous phase, the amount of dipropylene glycol used is 6 wt%.

[0203] Comparative Example 9

[0204] This comparative example is a comparative example of Example 3, and the only difference from Example 3 is that no pH adjuster is added.

[0205] Performance Testing

[0206] 1. Stability test

[0207] 1. Centrifugal stability test

[0208] The liquid foundations (7-9 mL) prepared in Examples 1 to 6 and Comparative Examples 1 to 3 were centrifuged at 3000 rpm for 30 min, and the stratification of the liquid foundations was observed.

[0209] 2. High and low temperature stability test

[0210] The liquid foundations prepared in Examples 1 to 6 and Comparative Examples 1 to 3 were placed in a thermostat at 45°C and -15°C, respectively, and left to stand for two weeks. The liquid foundations were then taken out and returned to room temperature to observe whether there were any delamination, thickening, color change, or odor change.

[0211] The results are shown in the following table.

[0212] Table 4. Stability test results

[0213]

[0214] As can be seen from the above table, the W / O / W liquid foundations prepared in Examples 1 to 15 of the present application showed good stability in the centrifugation test and the high and low temperature test, while Comparative Examples 1 to 9 showed varying degrees of instability.

[0215] 2. Ductility

[0216] The viscosity curve was measured by rheometer to characterize the ductility. The shear rate was set at 0.1s -1 to 100s -1 The range increases logarithmically, with the test temperature at 25°C and a CP25 rotor. The change in viscosity with shear rate was measured to simulate the spreading process. The results are shown in Table 5. The greater the viscosity drop (Δη), the stronger the thixotropy, the lower the resistance during spreading, and the better the ductility.

[0217] Table 5

[0218]

[0219]

[0220] According to the data in the table, Δη of Examples 1 to 9 is significantly higher than that of Examples 10 to 15, which indicates that the W / O / W liquid foundation provided by Examples 1 to 9 has significantly better ductility than that of Examples 10 to 15.

[0221] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0222] (1) This application adopts a W / O / W multiple emulsion system, combined with the interfacial self-assembly ability and biocompatibility of polyglycerol fatty acid ester emulsifiers, so that the foundation has a light and transparent skin feel and a moist and refreshing use experience, avoiding the greasy feeling of traditional W / O type foundation and the non-waterproof nature of O / W type foundation.

[0223] (2) The polyglycerol fatty acid ester emulsifier used in this application is a non-ionic surfactant with excellent performance, non-toxicity, non-irritation, and biodegradability. Compared with traditional silicone emulsifiers and non-ionic surfactants, it has lower skin irritation and is suitable for all skin types.

[0224] (3) The liquid foundation of this application is light, translucent, moisturizing, and not easy to remove makeup. It can meet the needs of dry, oily, and combination skin types and provide a consistent user experience. In addition to basic concealing and modifying functions, the liquid foundation of this application also has multiple functions such as moisturizing, waterproofing, and sweat resistance, which can meet the needs of consumers in different usage scenarios.

[0225] (4) The preparation method provided in this application has clear steps, is easy to operate, can be emulsified at room temperature, and is easy to industrialize. The two-step method for preparing multiple emulsions can effectively control the emulsion formation process and ensure the stability and consistency of the product.

[0226] The various technical features of the above-mentioned implementation modes and examples can be combined in any appropriate manner. In order to make the description concise, not all possible combinations of the various technical features in the above-mentioned implementation modes and examples are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the description in this specification.

[0227] The above-described embodiments only express several implementation methods of the present application, which facilitate a specific and detailed understanding of the technical solutions of the present application, but cannot be understood as limiting the scope of protection of the patent application. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present application, several variations and improvements can be made, which all fall within the scope of protection of the present application. In addition, it should be understood that after reading the above-mentioned teaching content of the present application, those skilled in the art can make various changes or modifications to the present application, and the equivalent forms obtained also fall within the scope of protection of the present application. It should also be understood that the technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the technical solutions provided in the present application are all within the scope of protection of the claims attached to the present application. Therefore, the scope of protection of the patent application of the present application shall be based on the content of the attached claims, and the description and drawings can be used to interpret the content of the claims.

Claims

1. A W / O / W liquid foundation, characterized in that: The W / O / W liquid foundation comprises a first aqueous phase, an oil phase, and a second aqueous phase. The weight proportion of each component in the W / O / W liquid foundation is calculated as follows: The first aqueous phase includes the following components: The oil phase includes the following ingredients: The second aqueous phase includes the following components:

2. The W / O / W liquid foundation according to claim 1, characterized in that The W / O / W liquid foundation satisfies one or more of the following conditions: (1) The polyols in the first aqueous phase and the second aqueous phase independently include one or more of dipropylene glycol, butylene glycol, 1,3-propanediol, glycerol and pentanediol; (2) the W / O emulsifier in the oil phase includes one or more of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, polyglyceryl-3 dipolyhydroxystearate, polyglyceryl-6 polyricinoleate, polyglyceryl-3 polyricinoleate, and polyglyceryl-3 diisostearate; and, (3) The O / W emulsifier in the second aqueous phase includes one or more of polyglyceryl-10 stearate, polyglyceryl-10 dioleate, polyglyceryl-10 laurate, polyglyceryl-10 myristate and glyceryl stearate citrate.

3. The W / O / W liquid foundation according to claim 2, characterized in that The polyol in the first aqueous phase and the second aqueous phase is dipropylene glycol; The W / O emulsifier in the oil phase is two or more of polyglyceryl-3 polydimethylsilyl hydroxyethyl polydimethylsiloxane, polyglyceryl-2 dipolyhydroxystearate and polyglyceryl-3 diisostearate; The O / W emulsifier in the second aqueous phase is polyglyceryl-10 stearate.

4. The W / O / W liquid foundation according to any one of claims 1 to 3, characterized in that The inorganic salt in the first aqueous phase is an alkali metal salt; Optionally, the salt in the first aqueous phase includes one or more of magnesium salt and sodium salt; Optionally, the salt in the first aqueous phase includes one or more of sulfate and hydrochloride.

5. The W / O / W liquid foundation according to any one of claims 1 to 3, characterized in that The W / O / W liquid foundation satisfies one or more of the following conditions: 1) the thickener in the second aqueous phase comprises one or more of acrylates / C10-30 alkyl acrylate crosspolymer, carbomer 980 and xanthan gum; and, 2) The thickener in the oil phase is one or more of isododecane / disteardimethylamine hectorite / propylene carbonate, cyclopentasiloxane / disteardimethylamine hectorite / propylene carbonate, and silica dimethyl silylate.

6. The W / O / W liquid foundation according to any one of claims 1 to 3, characterized in that The W / O / W liquid foundation satisfies one or more of the following conditions: (A) the preservatives in the first aqueous phase and the second aqueous phase each independently include one or more of methylparaben, phenoxyethanol, and ethylhexylglycerin; (B) the oil in the oil phase comprises one or more of diethylhexyl carbonate, dimethicone, ethylhexyl palmitate, caprylic / capric triglyceride, propylene glycol dicaprylate, dicaprylyl carbonate, cyclopentasiloxane, PEG / PPG-18 / 18 dimethicone, and caprylyl methicone; (C) the toner in the oil phase comprises one or more of CI77891 / isopropyl titanium triisostearate / polydimethylsiloxane / alumina, CI77492 / isopropyl titanium triisostearate / polydimethylsiloxane, CI77491 / isopropyl titanium triisostearate / polydimethylsiloxane, and CI77499 / isopropyl titanium triisostearate / polydimethylsiloxane; and (D) The pH adjuster in the second aqueous phase includes one or more of triethanolamine and arginine.

7. The method for preparing the W / O / W liquid foundation according to any one of claims 1 to 6, characterized in that: The preparation method comprises the following steps: Prepare the first aqueous phase, oil phase and second aqueous phase respectively using the ingredients; and The first aqueous phase, the oil phase and the second aqueous phase are mixed to prepare a W / O / W liquid foundation.

8. The method for preparing the W / O / W liquid foundation according to claim 7, wherein: The step of preparing the first aqueous phase comprises: mixing an inorganic salt, a polyol and water, heating and stirring, cooling, and adding a preservative to the resulting mixture to prepare the first aqueous phase; Optionally, the step of preparing the first aqueous phase satisfies one or more of the following conditions: A) heating and stirring at a temperature of 85°C-90°C; and B) adding a preservative while the temperature of the resulting mixture is between 40°C and 50°C.

9. The method for preparing the W / O / W liquid foundation according to claim 7, wherein: The steps of preparing the oil phase include: mixing the ingredients, heating and stirring, and homogenizing to prepare the oil phase; Optionally, the step of preparing the oil phase satisfies one or more of the following conditions: C) heating and stirring at a temperature of 80°C-85°C; and D) The homogenization time is 2 min to 4 min.

10. The method for preparing the W / O / W liquid foundation according to claim 7, wherein: The steps of preparing the second aqueous phase include: mixing an emulsifier, a thickener, a polyol and water, heating and stirring, homogenizing, and sequentially adding a pH regulator and a preservative to prepare the second aqueous phase; Optionally, the step of preparing the second aqueous phase satisfies one or more of the following conditions: E) heating and stirring at a temperature of 80°C-85°C; F) The homogenization time is 2-4 minutes; G) adding a pH adjuster under the condition that the temperature of the homogenized product is below 70° C.; and H) adding a preservative while maintaining the mixture temperature at 40°C to 50°C after the addition of the pH adjuster.

11. The method for preparing the W / O / W liquid foundation according to any one of claims 7 to 10, characterized in that: The preparation method comprises: Step (1), pouring the first aqueous phase into the oil phase under stirring, continuing stirring, and homogenizing to prepare W / O colostrum; and Step (2), pouring the W / O colostrum into the second aqueous phase under stirring, stirring, and homogenizing to prepare a W / O / W liquid foundation; Optionally, the preparation method satisfies one or more of the following conditions: 1) In step (1), the stirring speed is 600 rpm-800 rpm, and the stirring time is continued for 8 min-12 min; J) In step (1), the homogenization conditions include: performing the homogenization at a speed of 8000 rpm to 12000 rpm for 3 min to 4 min; K) in step (2), during the process of pouring the W / O colostrum into the second aqueous phase, the temperature is controlled at 20° C. to 28° C. and the rotation speed is controlled at 400 rpm to 600 rpm; L) in step (2), the stirring time is 2 min to 4 min; and M) In step (2), the homogenization treatment conditions include: performing the homogenization treatment at a rotation speed of 6000 rpm-8000 rpm for 3 min-4 min.

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