A composition for preparing an emulsified wax, an emulsified wax, and a method for preparing the same and use thereof

Abstract

The application relates to the technical field of eye cosmetics, and particularly discloses a composition for preparing emulsified wax, the emulsified wax, a preparation method and application thereof. The emulsified wax provided by the application comprises the following components: hydroxypropyl methyl cellulose stearyl ether, acrylic acid (ester) / stearyl alcohol acrylic acid ester / polydimethylsiloxane methacrylic acid ester copolymer, wax, emulsifier; the rest is alkane solvent and water. The hydroxypropyl methyl cellulose stearyl ether is compounded with the acrylic acid (ester) / stearyl alcohol acrylic acid ester / polydimethylsiloxane methacrylic acid ester copolymer to form a dense hydrophobic oil-proof film on the surface of the wax, thereby significantly enhancing the hydrophobic oil-proof performance of the wax, and solving the technical problem that the existing wax has poor sebum resistance, the wax film formed by the wax is easily dissolved by sebum, and the makeup holding effect is poor.

Description

Technical Field

[0001] This application relates to the field of ophthalmic cosmetics technology, and more particularly to a composition for preparing emulsified wax, the emulsified wax, a method for preparing the same, and its application. Background Technology

[0002] Oil-based mascaras, as an important eye makeup product in the cosmetics industry, primarily function to provide lashes with a fuller, longer finish and excellent shaping ability to meet consumers' demands for sophisticated eye makeup. Mineral waxes are a commonly used key ingredient in oil-based mascara formulations, including microcrystalline waxes, ceresin waxes, and various synthetic waxes. These mineral waxes, with their excellent film-forming and shaping properties, can quickly form a uniform wax film on the lash surface, effectively coating the lash fibers to achieve a fuller, longer finish, while also improving lash curl and shaping durability.

[0003] However, the mineral wax used in existing oil-based mascara formulas has a significant performance defect: poor sebum resistance. This defect severely affects the actual performance and staying power of oil-based mascaras. Specifically, the skin around the eyes continuously secretes sebum, which contains a large amount of oil. When this sebum comes into contact with the mineral wax film on the eyelash surface, it easily dissolves the film structure formed by the mineral wax, causing the wax film to soften, flake off, and smudge. This significantly shortens the mascara's staying power, failing to meet consumers' demand for long-lasting wear. This problem is particularly pronounced in summer or in situations where the body sweats and produces excessive sebum.

[0004] In view of the shortcomings of the existing technology, how to improve the sebum resistance of mineral wax, enhance the hydrophobic and oil-resistant properties of the wax film formed by it, and thus improve the makeup-holding effect of oily mascara has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a composition for preparing emulsified wax, emulsified wax, preparation method and application thereof, to solve the technical problem that existing mineral waxes have poor sebum resistance and the wax film formed is easily dissolved by sebum, resulting in poor makeup holding effect.

[0006] To achieve the above-mentioned technical objectives, this application provides a composition for preparing emulsified wax, comprising the following components in weight percentages:

[0007] Hydroxypropyl methylcellulose stearyl ether 0.1%–0.5%; acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer 1–5%; wax 5–15%; emulsifier 1–5%; balance is alkane solvent and water.

[0008] Further, it includes the following components in weight percentage: 0.1-0.2% hydroxypropyl methylcellulose stearoxy ether; 1-2% acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer; 5-15% wax; 1-5% emulsifier; the balance being alkane solvent and water.

[0009] Furthermore, the wax is a mineral wax, which includes at least one of microcrystalline wax and ceresin.

[0010] Furthermore, the wax is a synthetic wax; the synthetic wax includes at least one of polyethylene wax, polyethylene glycol wax, and Fischer-Tropsch wax.

[0011] Furthermore, the emulsifier includes at least one of polyglycerol-4 isostearate, polyglycerol-3 diisostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, hexyl laurate, and cetearyl glucoside.

[0012] Furthermore, the alkane solvents include at least one of isododecane, isohexadecane, n-dodecane, n-hexadecane, and isooctane.

[0013] This application provides a method for preparing an emulsified wax, which is prepared using the above-mentioned composition and includes the following steps:

[0014] Hydroxypropyl methylcellulose stearoxy ether, acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer, wax, emulsifier, isododecane, and water are mixed until homogeneous to obtain a water-in-oil emulsion; the water-in-oil emulsion is dried to obtain an emulsified wax.

[0015] This application discloses an emulsified wax, which is prepared from the above-described composition or by the above-described preparation method;

[0016] Emulsified wax includes wax with a waterproof and oil-resistant film on its surface;

[0017] The waterproof and oil-resistant film is formed by winding and cross-linking hydroxypropyl methylcellulose stearyl ether, acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer;

[0018] The acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer includes polydimethylsiloxane segments; the polydimethylsiloxane segments are arranged on the contact surface between the waterproof and oil-resistant film and the air.

[0019] This application provides a cosmetic product, including an emulsified wax.

[0020] This application provides a mascara that includes an emulsified wax.

[0021] In summary, this application provides a composition for preparing emulsified wax, comprising the following components: hydroxypropyl methylcellulose stearoxy ether; acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer; wax; emulsifier; and the balance being an alkane solvent and water. This application combines hydroxypropyl methylcellulose stearoxy ether with acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer to form a dense hydrophobic and oil-repellent film on the wax surface, resulting in an emulsified wax with water and oil repellent properties, significantly enhancing the hydrophobic and oil-repellent properties of existing waxes.

[0022] Compared to existing technologies, the emulsified wax provided in this application has both oil-proof and waterproof effects, which can effectively improve the makeup-holding performance of cosmetics (such as mascara) made from it. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 The images show the makeup retention effect under different makeup retention times, as provided in Test Example 4 of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments in this application specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0026] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] The main raw materials used in this invention and their corresponding CAS numbers are as follows: isododecane (CAS No.: 93685-81-5 / 13475-82-6); hydroxypropyl methylcellulose stearyl ether (CAS No.: 141615-27-2); ammonium acryloyldimethyl taurate / VP copolymer (purchased from HeYi Commercial Port (Guangzhou)). Trade Development Co., Ltd.); Acrylic (ester) esters / stearyl acrylate / polydimethylsiloxane methacrylate copolymer (CAS No.: 329236-76-2); Acrylic (ester) esters / polydimethylsiloxane copolymer (CAS No.: 756819-45-1); Polyglycerol-4 isostearate (CAS No.: 63705-03-3); Cetyl PEG / PPG-10 / 1 polydimethylsiloxane (CAS No.: 144243-53-8); Hexyl laurate (CAS No.: 34316-64-8); Microcrystalline wax (CAS No.: 63231-60-7).

[0029] This application provides a composition for preparing emulsified wax, comprising the following components by weight percentage:

[0030] Hydroxypropyl methylcellulose stearyl ether 0.1%–0.5%; acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer 1–5%; wax 5–15%; emulsifier 1–5%; balance is alkane solvent and water.

[0031] It should be noted that while wax itself is hydrophobic, it has poor sebum resistance. Oils secreted by the skin around the eyes easily dissolve the film structure formed by the wax, leading to problems such as pigment migration and cream peeling, ultimately resulting in poor makeup retention. In the emulsified wax provided in this application, the molecular chains of acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer are entangled on the wax surface. The acrylate backbone forms a continuous and strong film backbone through segment entanglement and self-crosslinking. Furthermore, the polydimethylsiloxane segments with excellent hydrophobic and oil-repellent properties spontaneously migrate to the surface where the film contacts the air, further enhancing the film's oil-repellent ability. Simultaneously, the physical crosslinking network formed by hydroxypropyl methylcellulose stearoxy ether interpenetrates, entangles, and fills the continuous film formed by the acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer, ultimately constructing a more dense composite film structure that significantly enhances the wax's hydrophobic and oil-repellent properties.

[0032] In some specific embodiments, the mass percentage of hydroxypropyl methylcellulose stearoxy ether is 0.1%, 0.2%, 0.3%, 0.4%, or 0.5%; the mass percentage of acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer is 1%, 2%, 3%, 4%, or 5%; the mass percentage of wax is 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, or 15%; and the mass percentage of emulsifier is 1%, 2%, 3%, 4%, or 5%.

[0033] In some preferred embodiments, the components include the following components in weight percentages: 0.1-0.2% hydroxypropyl methylcellulose stearoxy ether; 1-2% acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer; 5-15% wax; 1-5% emulsifier; and the balance being alkane solvents and water.

[0034] In some specific embodiments, the following components are included in weight percentage: 0.1-0.2% hydroxypropyl methylcellulose stearoxy ether; 1-2% acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer; 5-15% wax; 1-5% emulsifier; 44.8-45.9% alkane solvent; and the balance being water.

[0035] In some embodiments, the wax is a mineral wax, which includes at least one of microcrystalline wax and ceresin.

[0036] In some embodiments, the wax is a synthetic wax, which includes at least one of polyethylene wax, polyethylene glycol wax, and Fischer-Tropsch wax.

[0037] In some embodiments, the emulsifier includes at least one of polyglycerol-4 isostearate, polyglycerol-3 diisostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, hexyl laurate, and cetearyl glucoside.

[0038] In some embodiments, the emulsifier includes polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, and hexyl laurate; the mass ratio of polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, and hexyl laurate is 33.5:33.5:33.

[0039] In some embodiments, the alkane solvent includes at least one of isododecane, isohexadecane, n-dodecane, n-hexadecane, and isooctane.

[0040] This application provides a method for preparing an emulsified wax, which is prepared using the above-mentioned composition and includes the following steps:

[0041] Hydroxypropyl methylcellulose stearoxy ether, acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer, wax, emulsifier, isododecane, and water are mixed until homogeneous to obtain a water-in-oil emulsion; the water-in-oil emulsion is dried to obtain an emulsified wax.

[0042] It should be noted that in the water-in-oil emulsion, the hydrophobic stearoxy groups on the molecular chains of hydroxypropyl methylcellulose stearoxy ether aggregate in an aqueous environment to form a stable physical cross-linking network. On the other hand, during the drying process of the water-in-oil emulsion, as the solvent in the system gradually evaporates, the molecular chains of the acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer become intertwined on the wax surface. The acrylate skeleton forms a continuous and tough film skeleton through segment entanglement and self-crosslinking. The polydimethylsiloxane segments in this skeleton have excellent hydrophobic and oil-repellent properties. At the same time, the physical cross-linking network formed by hydroxypropyl methylcellulose stearoxy ether and the continuous film formed by the acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer interpenetrate, intertwine, and fill each other, ultimately constructing a more compact composite film structure.

[0043] In some specific embodiments, the method for preparing emulsified wax includes the following steps:

[0044] Step S1: Isododecane, hydroxypropyl methylcellulose stearoxy ether, and acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer are placed in an emulsifying pot and homogenized at a homogenization speed of 500-3500 r / min for 3-10 minutes to obtain the first mixture;

[0045] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 70-80°C, and stir at 50-300 r / min until the microcrystalline wax is dissolved; then homogenize at 500-3500 r / min for 3-10 minutes to obtain the second mixture.

[0046] Step S3: Add deionized water at a temperature of 70-80℃ to the second mixture, and homogenize at a homogenization speed of 500-3500 r / min for 5-20 minutes to form a fine and uniform emulsion.

[0047] Step S4: Transfer the emulsion to a container, place the container holding the emulsion in an oven at a temperature of 80-90°C and bake for 12-36 hours to obtain emulsified wax.

[0048] This application provides an emulsified wax, which is prepared from the above-described composition or by the above-described preparation method;

[0049] Emulsified wax includes wax with a waterproof and oil-resistant film on its surface;

[0050] The waterproof and oil-resistant film is formed by winding and cross-linking hydroxypropyl methylcellulose stearyl ether, acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer;

[0051] The acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer includes polydimethylsiloxane segments; the polydimethylsiloxane segments are arranged on the contact surface between the waterproof and oil-resistant film and the air.

[0052] This application provides a cosmetic product, including an emulsified wax.

[0053] This application provides a mascara that includes an emulsified wax.

[0054] It should be noted that adding the emulsified wax prepared in this application to oil-based mascaras can effectively improve the problems of smudging and poor staying power of oil-based mascaras. Its mechanism of action is mainly reflected in the following two aspects: Firstly, the surface of the emulsified wax is covered with a dense hydrophobic and oleophobic composite film, which effectively blocks the penetration of sebum from the eye area and external oils, preventing the mascara from being dissolved by oils, thereby reducing smudging. Secondly, the surface of the emulsified wax contains a large number of hydroxyl groups, which can interact with amino and hydroxyl groups on the surface of the eyelashes through hydrogen bonds, significantly enhancing the bonding force between the oil-based mascara and the eyelashes, reducing the amount of mascara falling off, and thus comprehensively improving the staying power of oil-based mascaras.

[0055] This embodiment provides a method for preparing mascara, including the following preparation steps:

[0056] Step S1: Add the A-phase raw materials (emulsified microcrystalline wax, isododecane, hydrogenated polyisobutylene, VP / eicosene copolymer, methyl polytrimethylsiloxane) into an emulsifying pot, heat to 70-80°C, turn on the stirring device, adjust the stirring speed to 50-300 r / min, and continue stirring until the A-phase raw materials are completely dissolved to obtain a uniform A-phase system.

[0057] Step S2: Place the B-phase raw materials (silica, mica, CI77499) and C-phase raw materials (isododecane, distearate, lithium dimethylammonium montmorillonite, propylene glycol carbonate) into clean containers, stir them evenly, and then send them together into a three-roll mill. Adjust the grinding distance to 4-6 μm and grind repeatedly 3-5 times to ensure that the raw materials are mixed evenly and the particle size meets the preset standard.

[0058] Step S3: Place the qualified B-phase raw material and C-phase raw material mixture into an emulsifying pot at a temperature of 70-80℃, turn on low-speed stirring at a speed of 50-500 r / min, and simultaneously start the homogenizing device, adjusting the homogenizing speed to 500-3500 r / min and the homogenizing time to 5-20 min, until the system forms a fine and uniform paste.

[0059] Step S4: Add the D-phase raw material (preservative) to the emulsifying pot, keep stirring at a low speed of 50-500 r / min, start the homogenizing device again, adjust the homogenizing speed to 500-3500 r / min, and homogenize for 5-20 min. The D-phase raw material is evenly dispersed in the paste.

[0060] Step S5: Add the E-phase raw material (Leyene, CI77266) to the emulsification pot, turn on the stirring device, adjust the stirring speed to 50-500 r / min, and stir for 15-30 min until the E-phase raw material is completely dispersed to obtain mascara.

[0061] The applicant further provides the following specific embodiments to describe the present invention. It should be noted that these embodiments are merely descriptive and do not limit the present invention in any way.

[0062] The equipment used in the following embodiments, comparative examples, and application examples includes: an electric heating drying oven (model: DHG-9070) and a Theta Lite optical contact angle measuring instrument.

[0063] Examples 1 to 5

[0064] Examples 1 to 5 provide a method for preparing emulsified wax. The preparation steps of each example are completely the same, and the only difference is the amount of each substance used. The specific amount of each substance used in each example is shown in Table 1.

[0065] The preparation method of the above-mentioned emulsified wax specifically includes the following preparation steps:

[0066] Step S1: Isododecane, hydroxypropyl methylcellulose stearoxy ether, and acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer are placed in an emulsifying pot and homogenized at a homogenization speed of 2000 r / min for 6 minutes to obtain the first mixture;

[0067] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 75°C, and stir at 80 r / min until the microcrystalline wax is dissolved; then homogenize at 2000 r / min for 6 minutes to obtain the second mixture.

[0068] Step S3: Deionized water at 75°C is added to the second mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0069] Step S4: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0070] Example 6

[0071] This embodiment provides a method for preparing an emulsified wax, which differs from Example 2 in that an equal amount of isohexadecane is used instead of isododecane; the preparation steps are as follows:

[0072] Step S1: Place isohexadecane, hydroxypropyl methylcellulose stearoxy ether, and acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer in an emulsifying pot and homogenize at a homogenization speed of 2000 r / min for 6 minutes to obtain the first mixture;

[0073] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 75°C, and stir at 80 r / min until the microcrystalline wax is dissolved; then homogenize at 2000 r / min for 6 minutes to obtain the second mixture.

[0074] Step S3: Deionized water at 75°C is added to the second mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0075] Step S4: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0076] Comparative Example 1

[0077] This comparative example provides a method for preparing an emulsified wax, including the following preparation steps:

[0078] Step S1: Place isododecane, emulsifier, and microcrystalline wax in an emulsification pot and stir at 80 r / min until the microcrystalline wax is dissolved to obtain the first mixture;

[0079] Step S2: Deionized water at 75°C is added to the first mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0080] Step S3: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0081] In this comparative example, the specific amounts of each substance are shown in Table 1.

[0082] In this comparative example, the specific amounts of each substance are shown in Table 1.

[0083] Comparative Example 2

[0084] This comparative example provides a method for preparing an emulsified wax, including the following preparation steps:

[0085] Step S1: Place isododecane and hydroxypropyl methylcellulose stearyl ether in an emulsifying pan and homogenize at a speed of 2000 r / min for 6 minutes to obtain the first mixture;

[0086] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 75°C, and stir at 80 r / min until the microcrystalline wax is dissolved; then homogenize at 2000 r / min for 6 minutes to obtain the second mixture.

[0087] Step S3: Deionized water at 75°C is added to the second mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0088] Step S4: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0089] In this comparative example, the specific amounts of each substance are shown in Table 1.

[0090] Comparative Example 3

[0091] This comparative example provides a method for preparing an emulsified wax, including the following preparation steps:

[0092] Step S1: Place isododecane and acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer in an emulsifying pot and homogenize at a homogenization speed of 2000 r / min for 6 minutes to obtain the first mixture;

[0093] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 75°C, and stir at 80 r / min until the microcrystalline wax is dissolved; then homogenize at 2000 r / min for 6 minutes to obtain the second mixture.

[0094] Step S3: Deionized water at 75°C is added to the second mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0095] Step S4: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0096] In this comparative example, the specific amounts of each substance are shown in Table 1.

[0097] Comparative Example 4

[0098] This comparative example provides a method for preparing an emulsified wax, including the following preparation steps:

[0099] Step S1: Place isododecane and ammonium acryloyldimethyltaurate / VP copolymer in an emulsification pot and homogenize at a homogenization speed of 2000 r / min for 6 minutes to obtain the first mixture;

[0100] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 75°C, and stir at 80 r / min until the microcrystalline wax is dissolved; then homogenize at 2000 r / min for 6 minutes to obtain the second mixture.

[0101] Step S3: Deionized water at 75°C is added to the second mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0102] Step S4: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0103] In this comparative example, the specific amounts of each substance are shown in Table 1.

[0104] Comparative Example 5

[0105] This comparative example provides a method for preparing an emulsified wax, including the following preparation steps:

[0106] Step S1: Place isododecane and acrylate / polydimethylsiloxane copolymer in an emulsifying pot and homogenize at a homogenization speed of 2000 r / min for 6 minutes to obtain the first mixture;

[0107] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 75°C, and stir at 80 r / min until the microcrystalline wax is dissolved; then homogenize at 2000 r / min for 6 minutes to obtain the second mixture.

[0108] Step S3: Deionized water at 75°C is added to the second mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0109] Step S4: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0110] In this comparative example, the specific amounts of each substance are shown in Table 1.

[0111] Comparative Example 6

[0112] This comparative example provides a method for preparing an emulsified wax, including the following preparation steps:

[0113] Step S1: Place isododecane, ammonium acryloyldimethyltaurate / VP copolymer, and acrylate / polydimethylsiloxane copolymer in an emulsifying pot and homogenize at a homogenization speed of 2000 r / min for 6 minutes to obtain the first mixture;

[0114] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 75°C, and stir at 80 r / min until the microcrystalline wax is dissolved; then homogenize at 2000 r / min for 6 minutes to obtain the second mixture.

[0115] Step S3: Deionized water at 75°C is added to the second mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0116] Step S4: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0117] In this comparative example, the specific amounts of each substance are shown in Table 1.

[0118] Comparative Example 7

[0119] This comparative example provides a method for preparing an emulsified wax, including the following preparation steps:

[0120] Step S1: Place isododecane, hydroxyethyl cellulose, and acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer in an emulsifying pot and homogenize at a homogenization speed of 2000 r / min for 6 minutes to obtain the first mixture;

[0121] Step S2: Add microcrystalline wax and emulsifier to the emulsification pot, heat the emulsification pot to 75°C, and stir at 80 r / min until the microcrystalline wax is dissolved; then homogenize at 2000 r / min for 6 minutes to obtain the second mixture.

[0122] Step S3: Deionized water at 75°C is added to the second mixture, and homogenized at 3000 r / min for 15 minutes to form a fine and uniform emulsion; wherein the emulsifiers include polyglycerol-4 isostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane and hexyl laurate, with added amounts of 1.005 g, 1.005 g and 0.99 g, respectively;

[0123] Step S4: Place the emulsion in a stainless steel tray, at which point the thickness of the emulsion is 3-5 mm; place the stainless steel tray containing the emulsion in an oven at a temperature of 80-90℃ and bake for 24 hours to obtain emulsified wax.

[0124] In this comparative example, the specific amounts of each substance are shown in Table 1.

[0125] Comparative Example 8

[0126] This comparative example provides a microcrystalline wax.

[0127] Test Example 1

[0128] Water resistance test: The emulsified wax or microcrystalline wax provided in Examples 1-6 and Comparative Examples 1-8 were used for water resistance testing. The emulsified wax or microcrystalline wax was heated to 70-80°C, at which point it was in a molten state. The molten emulsified wax or microcrystalline wax was placed on a glass slide and stretched into a plane with a thickness of 90 μm using a four-sided preparer. It was then cooled to room temperature to form a wax film. The water resistance of the wax film was tested using an optical contact angle meter (Theta Lite) combined with the "sitting drop method". The specific test results of this test example are detailed in Table 1.

[0129] Test Example 2

[0130] Oil resistance test: The emulsified waxes or microcrystalline waxes provided in Examples 1-6 and Comparative Examples 1-8 were used for oil resistance testing. The emulsified waxes or microcrystalline waxes were heated to 70-80°C, at which point they were in a molten state. The molten emulsified waxes or microcrystalline waxes were placed on a glass slide and stretched into a plane with a thickness of 90 μm using a four-sided preparation device. The wax film was then cooled to room temperature to form a wax film. The oil resistance of the wax film was tested using an optical contact angle meter (Theta Lite) combined with the "sitting drop method". The specific test results for this test example are detailed in Table 1.

[0131] Table 1. Water and oil repellency data of emulsified waxes or microcrystalline waxes

[0132]

[0133] As shown in Table 1, Examples 1, 2, and 6 exhibited the largest water contact angles and the best waterproof performance, indicating that the combination of hydroxypropyl methylcellulose stearoxy ether with acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer can produce a synergistic effect, significantly improving the waterproof performance of the wax. The waterproof performance of Examples 3-5 decreased because the amount of hydroxypropyl methylcellulose stearoxy ether was too high, far exceeding the critical micelle concentration of the emulsion. This caused cross-linking of the hydrophobic stearoxy groups, exposing the hydrophilic hydroxypropyl methylcellulose backbone, increasing the hydrophilicity of the system, and thus weakening the waterproof effect. Furthermore, Example 6, after replacing isododecane with isohexadecane, still maintained excellent hydrophobicity and oleophobicity, demonstrating that the reasonable substitution of conventional alkane solvents does not affect the hydrophobic and oleophobic properties of the wax.

[0134] Based on the oil repellency test data in Table 6, Examples 1, 2, and 6 showed the largest oil contact angles and the best oil repellency performance, further verifying that the synergistic effect of hydroxypropyl methylcellulose stearoxy ether and acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer can effectively enhance the oil repellency of the wax. The reason for the decrease in oil repellency in Examples 3-5 is consistent with the decrease in water repellency, namely, the excessive amount of hydroxypropyl methylcellulose stearoxy ether leads to an increase in the surface energy of the system; when acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer is in excess, the high surface energy stearic acid long-chain alkane segments and acrylate backbone in its molecules compete with the low surface energy siloxane segments for the air-film interface, resulting in an increase in the proportion of high surface energy segments on the composite film surface, thereby reducing oil repellency.

[0135] Comparing Example 2 and Comparative Example 6, it is evident that the composite film formed on the wax surface by hydroxypropyl methylcellulose stearyl ether and the copolymer of acrylates / stearyl acrylates / polydimethylsiloxane methacrylates is denser and exhibits superior waterproof and oil-repellent properties. This is because the ammonium acryloyl dimethyl taurate / VP copolymer used in Comparative Example 6 is a hydrophilic substance, resulting in a film with poor oleophobicity. Furthermore, it requires an emulsifier to bridge the ammonium acryloyl dimethyl taurate / VP copolymer and the acrylate / polydimethylsiloxane copolymer, which easily leads to an uneven and discontinuous composite film. In contrast, the composite film formed by the two emulsifiers used in this application exhibits an interpenetrating and entangled structure, significantly improving density. In summary, the emulsification ratios of Examples 1-2 and 6 enable the wax to form a dense and stable waterproof and oil-repellent composite film, representing the optimal emulsification ratio.

[0136] Application Example 1

[0137] This application example provides a mascara and its preparation method; the components of the mascara are shown in Table 2, and the preparation method of the mascara is as follows:

[0138] Step S1: Add the A phase raw material into the emulsification pot and heat it to 75°C. Turn on the stirring device and stir at 80 r / min until the A phase raw material is completely dissolved to obtain a homogeneous A phase system.

[0139] Step S2: Place the B-phase raw material and the C-phase raw material in clean containers and stir them evenly. Then, send the mixed B-phase and C-phase raw materials to a three-roll mill, adjust the grinding distance to 5μm, and grind repeatedly 5 times to ensure that the B-phase and C-phase raw materials are mixed evenly and the particle size meets the preset standard.

[0140] Step S3: Add the mixture of phase B and phase C raw materials that meet the preset standards into the emulsification pot, stabilize the temperature of the emulsification pot at 75°C, start low-speed stirring at 150 r / min, and start the homogenizing device at 3000 r / min for 15 min, homogenizing until the system forms a fine, uniform paste without particles.

[0141] Step S4: Add the D-phase raw material to the emulsification pot, keep stirring at a low speed of 150 r / min, start the homogenizing device again, homogenize for 5 min, and ensure that the D-phase raw material is evenly dispersed in the paste without local aggregation.

[0142] Step S5: Add the E-phase raw material to the emulsification pot, turn on the stirring device, stir at a speed of 150 r / min for 25 min, stir until the E-phase raw material is completely dispersed to obtain mascara, and seal the mascara for later use.

[0143] Table 2. Mascara Ingredients

[0144]

[0145] Note: In phase C, the mass ratio of isododecane, distearate dimethylammonium lithium montmorillonite, and propylene glycol carbonate is 80:15:5; in phase E, the mass ratio of rayon and carbon black is 97:3.

[0146] Comparative Application Example 1

[0147] This comparative application example provides a mascara and its preparation method; the components and amounts of the mascara are shown in Table 2, and the preparation method of the mascara is the same as that in Application Example 1.

[0148] Test Example 3

[0149] Oil resistance test: Oil resistance tests were conducted on the mascaras prepared for Application Example 1 and Comparative Application Example 1. The mascaras were placed on a glass slide and stretched into a 90 μm thick plane using a four-sided preparer. 0.05 g of oleic acid was added to the center of the plane using a dropper; the initial diameter of the droplet formed by the oleic acid on the plane was taken as the initial diameter. After standing for 8 hours, the final diameter of the droplet formed by the oleic acid on the plane was taken as the final diameter. Five parallel tests were set up for both Application Example 1 and Comparative Application Example 1. The test results are shown in Table 3.

[0150] Table 3. Mascara oil-control performance test data

[0151]

[0152] According to the data in Table 3, the mascara prepared in Application Example 1 showed a significantly smaller variation in oil droplet diameter than the mascara prepared in Comparative Application Example 1. This indicates that adding the emulsified wax prepared in this application to the mascara can effectively improve its oil-resistant properties.

[0153] Test Example 4

[0154] Makeup retention test: Five healthy volunteers (aged 20-35, with no eye skin diseases or history of mascara allergy) were selected. Using the same type of eyelash curler, both eyes' eyelashes were curled to a uniform arc to ensure a consistent initial state. The left eye was coated with the mascara prepared in Example 1, and the right eye with the mascara prepared in Example 1. The same operator applied the mascara using the same technique (applying two coats evenly from the root to the tip of the lashes, with a 30-second interval between each coat). After applying the mascara, the volunteers were placed in a constant temperature and humidity environment (temperature 25±1℃, humidity 50±5%RH) for normal activities. At 4 and 8 hours of makeup retention, the smudging of both eyelashes was photographed using the same type of camera, with the same shooting angle and lighting conditions. The smudging extent and degree at the lash roots and around the eyes were recorded. See [link to relevant documentation]. Figure 1 Compare the shedding of lash roots and smudging around the eyes under different makeup wearing times.

[0155] according to Figure 1 The results show that after 4 hours of wear, visible smudging appeared in the left eyes of volunteers 2, 4, and 5, with volunteer 4 also experiencing fiber shedding in their left eye. No significant smudging was observed in the right eyes of any of the five volunteers, and the overall makeup effect remained intact. After 8 hours of wear, significant smudging appeared in the left eyes of all five volunteers, with severe damage to the makeup effect; while only slight smudging or no smudging appeared in the right eyes of all five volunteers. Based on the combined data from the five volunteers' makeup tests, a clear conclusion can be drawn: adding the emulsified wax prepared in this application to the mascara formula can effectively improve the staying power of oil-based mascaras and significantly enhance their anti-smudging and anti-shedding capabilities.

[0156] The above are merely preferred embodiments of this application and are not intended to limit the present invention. Although this application has been described in detail with reference to examples, those skilled in the art can still modify the technical solutions described in the foregoing examples or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A composition for preparing emulsified wax, characterized in that, The components include the following percentages by mass: Hydroxypropyl methylcellulose stearyl ether 0.1%–0.5%; acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer 1–5%; wax 5–15%; emulsifier 1%–5%; balance is alkane solvent and water.

2. The composition according to claim 1, characterized in that, The components include the following percentages by mass: Hydroxypropyl methylcellulose stearyl ether 0.1-0.2%; acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer 1-2%; wax 5-15%; emulsifier 1-5%; balance is alkane solvent and water.

3. The composition according to claim 1, characterized in that, The wax is a mineral wax, which includes at least one of microcrystalline wax and ceresin wax.

4. The composition according to claim 3, characterized in that, The wax is a synthetic wax; the synthetic wax includes at least one of polyethylene wax, polyethylene glycol wax, and Fischer-Tropsch wax.

5. The composition according to claim 1, characterized in that, The emulsifier includes at least one of polyglycerol-4 isostearate, polyglycerol-3 diisostearate, cetyl PEG / PPG-10 / 1 polydimethylsiloxane, hexyl laurate, and cetearyl glucoside.

6. The composition according to claim 1, characterized in that, The alkane solvents include at least one of isododecane, isohexadecane, n-dodecane, n-hexadecane, and isooctane.

7. A method for preparing an emulsified wax, characterized in that, The composition is prepared using any one of claims 1 to 6, and includes the following steps: Hydroxypropyl methylcellulose stearoxy ether, acrylate / stearyl acrylate / polydimethylsiloxane methacrylate copolymer, wax, emulsifier, isododecane, and water are mixed until homogeneous to obtain a water-in-oil emulsion; the water-in-oil emulsion is dried to obtain an emulsified wax.

8. An emulsified wax, characterized in that, The emulsified wax is prepared from the composition according to any one of claims 1 to 6, or from the preparation method according to claim 7; The emulsified wax includes wax, and the surface of the wax is provided with a waterproof and oil-proof film. The waterproof and oil-repellent film is formed by winding and cross-linking hydroxypropyl methylcellulose stearoxy ether, acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer; The acrylic (ester) / stearyl acrylate / polydimethylsiloxane methacrylate copolymer includes polydimethylsiloxane segments; the polydimethylsiloxane segments are arranged on the contact surface between the waterproof and oil-resistant film and the air.

9. A cosmetic product, characterized in that, Includes the emulsified wax as described in claim 8.

10. A mascara, characterized in that, Includes the emulsified wax as described in claim 8.

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