An oil-free and wax-free pore invisible stick and a preparation method thereof

Abstract

The present application provides an oil-free and wax-free pore invisible stick and a preparation method thereof, the raw materials of the pore invisible stick comprising polyhydric alcohol, higher fatty acid salt, soft-focus oil control agent, humectant and solvent; the pore invisible stick does not contain oil and wax. The pore invisible stick prepared by the present application is an oil-free and wax-free system, does not contain emulsifier and high-molecular thickening agent, can be used without adding preservative, does not need emulsification, and has simple production process, only needs stirring and heating, greatly reduces production time, improves production efficiency, and the stick product is small and portable for use, and more importantly, the skin feeling is refreshing and not thick and greasy, can effectively control oil and hide pores, and has excellent durability.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to an oil-free and wax-free pore-minimizing stick and its preparation method. Background Technology

[0002] With the continuous development of the domestic cosmetics market, consumer demand is becoming more focused on quality and personalization, and the consumption structure is becoming more fashionable and diversified. Furthermore, with the improvement of people's living standards, the fast-paced lifestyle, and high stress levels, people with oily skin experience increased facial oil production and enlarged pores, leading to a growing demand for products that minimize pores. These products are typically lotion-like and need to be squeezed onto the hand before application.

[0003] Stick-shaped cosmetics are popular among consumers because of their small size, portability, and ease of use. Most existing pore-concealing cosmetics use an oil-in-water system, adding silica or silicone powder to achieve an optical soft-focus effect, thus concealing pores, or adding titanium dioxide for a covering effect.

[0004] CN115554205A discloses a matte pore-minimizing stick and its preparation process. The matte pore-minimizing stick contains methyl methacrylate crosspolymer, cetyl ethylhexanoate, water, polyethylene, silica, hydrogenated polyisobutylene, octyl dodecanol, isononyl isononanoate, pentaerythritol tetraisostearate, microcrystalline wax, silylated silica, dimethyl silylated silica, phenoxyethanol, polyhydroxystearic acid, lecithin, and other trace ingredients. This method, through modification and optimization of the formula, allows the product to be made into a solid form, such as a stick, which is easy to apply and avoids secondary contamination from contact with the material. The application effect is excellent; after makeup application, it immediately creates a matte finish with a noticeable soft-focus matte effect, instantly filling pores and providing excellent pore-minimizing effect. Furthermore, the solid product process is simple, requiring only heating and stirring, which greatly reduces production time and improves production efficiency. However, the addition of a large amount of oil in this process, combined with the sebum secreted by the human body throughout the day, can easily alter the purpose of the product in concealing pores through optical effects immediately after application to the skin, making it difficult to achieve a long-lasting pore-concealing effect. Furthermore, the use of a large amount of oil makes the product feel heavy and greasy, which is a poor experience for consumers with oily skin or in hot weather.

[0005] CN116370355A discloses a makeup base stick and its preparation method. The makeup base stick comprises the following components in parts by weight: 8.5-66 parts skin conditioning agent, 0.2-66.5 parts emollient, 2.5-21 parts thickener, and 0.1-1.5 parts moisturizer. The skin conditioning agent is composed of vinyl polydimethylsiloxane / polymethylsiloxane silsesquioxane cross-linked polymer, polymethylsilsesquioxane, cyclopentamethoxysiloxane / polydimethylsiloxane cross-linked polymer, polydimethylsiloxane / vinyl polydimethylsiloxane cross-linked polymer / isododecane, and phytosterol isostearate. This method provides a lightweight, smooth, all-oil-based makeup base stick with moisturizing, wrinkle-reducing, pore-minimizing, and concealing effects. However, the use of a large amount of thickener makes the product feel heavy after application, and although it can minimize pores, it can cause breakouts.

[0006] CN104546553A discloses a pore-minimizing primer, which is composed of the following components by weight percentage: 50-90% silicone elastomer, 5-15% sunscreen, 0.1-15% skin feel modifier, 0.17-0.51% emulsifier, 0.1-1% pigment, 0.1-1% preservative, appropriate amount of fragrance, and the remainder oil. This pore-minimizing primer has sun protection function, a smooth skin feel, and after application, it can achieve the effects of concealing pores, covering wrinkles, and making makeup more natural and long-lasting. However, this primer needs to be spread on the face with hands or makeup tools, and its ease of use needs improvement.

[0007] Therefore, developing a pore-minimizing stick that controls oil, minimizes pores, and has a refreshing feel is a key research focus in this field. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the present invention aims to provide an oil-free and wax-free pore-minimizing stick and its preparation method, which can control oil and conceal pores while providing a refreshing feel on the skin.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] In a first aspect, the present invention provides an oil-free and wax-free pore-concealing stick, wherein the raw materials of the pore-concealing stick include polyols, higher fatty acid salts, soft-focus oil-controlling agents, moisturizers and solvents.

[0011] The pore-minimizing stick does not contain oils or waxes.

[0012] Preferably, the raw materials of the pore-minimizing stick, by weight, include:

[0013] 30-60 parts of polyol (e.g., 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 ​​parts, 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, etc.);

[0014] 1-10 parts of higher fatty acid salts (e.g., 2 parts, 4 parts, 6 parts, 8 parts, etc.);

[0015] 2-30 parts of soft-focus oil control agent (e.g., 4 parts, 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, etc.);

[0016] Moisturizer 0.5-10 parts (e.g., 0.6 parts, 0.8 parts, 1 part, 2 parts, 4 parts, 6 parts, 8 parts, etc.);

[0017] Solvent 20-70 parts (e.g., 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 ​​parts, 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, 62 parts, 64 parts, 66 parts, 68 parts, etc.).

[0018] Preferably, the polyol includes any one or a combination of at least two of 1,3-propanediol, 1,3-butanediol, 1,2-propanediol, dipropylene glycol, 1,2-pentanediol, 1,2-hexanediol, methylpropanediol, or isopentanediol.

[0019] Preferably, the higher fatty acid salt includes any one or a combination of at least two of sodium higher fatty acid, magnesium higher fatty acid, calcium higher fatty acid, and potassium higher fatty acid.

[0020] Preferably, the higher fatty acid salt includes any one or a combination of at least two of laurate, palmitate, or stearate.

[0021] Preferably, the soft-focus and oil-controlling agent comprises any one or a combination of at least two of the following: organosilicon powder, silica, methyl methacrylate crosspolymer, polymethyl methacrylate, hydropyrite, bentonite, kaolin, or magnesium aluminum silicate.

[0022] Preferably, the organosilicon powder comprises any one or a combination of at least two of polymethylsilsesquioxane, vinyl polydimethylsiloxane / polymethylsilsesquioxane crosslinked polymer, polydimethylsiloxane / vinyl polydimethylsiloxane crosslinked polymer, or divinyl polydimethylsiloxane / polydimethylsiloxane copolymer.

[0023] The organosilicon powders used in this invention have all undergone surface hydrophilic treatment with silica or polyether surfactants.

[0024] Preferably, the moisturizer comprises any one or a combination of at least two of the following: hyaluronic acid, sodium hyaluronate, hydrolyzed sodium hyaluronate, trehalose, betaine, panthenol, hydrolyzed glucosamine, or Fucus vesiculatus extract.

[0025] Preferably, the solvent includes any one or a combination of at least two of the following: purified water, Hamamelis Virginiana water, Melaleuca alternifolia leaf water, or rose water.

[0026] Secondly, the present invention provides a method for preparing an oil-free and wax-free pore-minimizing stick as described in the first aspect. The preparation method includes: mixing polyol, moisturizer and solvent evenly, heating and stirring, adding higher fatty acid salt, dissolving and then adding soft-focus oil-controlling agent, dissolving evenly and then discharging and filling, cooling, to obtain the oil-free and wax-free pore-minimizing stick.

[0027] Preferably, the heating and stirring temperature is 60-80℃, for example, it can be 65℃, 70℃, 75℃, etc.

[0028] The numerical range described in this invention includes not only the point values ​​listed above, but also any point values ​​within the numerical ranges not listed above. Due to space limitations and for the sake of brevity, this invention will not exhaustively list all the specific point values ​​included in the range.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The pore-concealing stick prepared by this invention is an oil-free and wax-free system, and does not contain emulsifiers, polymer thickeners, or preservatives. It does not require emulsification and has a simple production process, requiring only stirring and heating, which greatly reduces production time and improves production efficiency. The stick-shaped product is small and easy to carry and use. More importantly, this invention has a refreshing and non-greasy feel on the skin, can effectively control oil, conceal pores, and has excellent staying power.

[0031] 2. Without the addition of high-grade fatty acid salts, the product is difficult to spread and apply, hard to form, and has poor water-locking ability, resulting in an insignificant pore-concealing effect. High-grade fatty acid salts can enhance the stability of the product; the addition of high-content polyols can reduce the amount of high-grade fatty acid salts used, and work synergistically to lock in and moisturize; the addition of moisturizers can make the pore-concealing effect last longer. Detailed Implementation

[0032] The technical solution of the present invention will be further illustrated below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of the present invention and should not be construed as limiting the invention in any way.

[0033] The terms “comprising,” “including,” “having,” “containing,” or any other variations thereof, as used herein, are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not limited to those elements and may also include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0034] "Optional" or "any one" means that the matter or event described thereafter may or may not occur, and the description includes both the possibility that the event may occur and the possibility that the event may not occur.

[0035] The indefinite articles “a” and “an” preceding an element or component of this invention do not impose any limitation on the quantity (i.e., number of times) of the element or component. Therefore, “an” or “a” should be interpreted as including one or at least one, and the singular form of an element or component also includes the plural form, unless the quantity clearly refers only to the singular form.

[0036] The terms "one embodiment," "some embodiments," "exemplary," "specific example," or "some examples," etc., used in this invention refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this document, the illustrative expressions of the above terms are not necessarily directed at the same embodiment or example.

[0037] In this invention, unless otherwise explicitly stated, percentages and contents are all by mass. Unless otherwise specified, the experimental methods used are conventional methods, and the materials and reagents used are commercially available.

[0038] Examples 1-4

[0039] This embodiment provides an oil-free and wax-free pore-minimizing stick. The raw material composition of the pore-minimizing stick is shown in Table 1, with all raw materials expressed in parts by weight:

[0040] Table 1

[0041]

[0042]

[0043] Preparation method:

[0044] Polyols and moisturizers are mixed and stirred to disperse evenly. Solvents are added and stirred to dissolve. The mixture is then heated to 70°C, and higher fatty acid salts are added and stirred to dissolve evenly. Then, a soft-focus oil-controlling agent is added and stirred to dissolve evenly. The mixture is then discharged into cans, cooled, and molded to obtain an oil-free and wax-free pore-minimizing stick.

[0045] Example 5

[0046] This embodiment provides an oil-free and wax-free pore-minimizing stick, which differs from Embodiment 1 only in the preparation method. The preparation method of this embodiment is as follows:

[0047] Polyols and moisturizers are mixed and stirred until evenly dispersed. Solvents are added and stirred until dissolved. The mixture is then heated to 70°C. A soft-focus oil-controlling agent is added and stirred until evenly dissolved. Then, high-grade fatty acid salts are added and stirred until evenly dissolved. The mixture is then discharged into containers, cooled, and molded to obtain an oil-free and wax-free pore-minimizing stick.

[0048] Monitoring revealed that in this embodiment, the dissolution time after adding higher fatty acid salts was relatively long, and it was difficult to dissolve them evenly. A homogenizer was required for mixing, and the resulting pore-minimizing sticks were prone to having liquid droplets on the surface, which caused them to appear "sweaty".

[0049] Comparative Example 1

[0050] This comparative example provides an oil-free and wax-free pore-concealing stick, which differs from Example 4 only in that no polyol is added. Other raw materials, dosages, and preparation methods are the same as in Example 4.

[0051] Comparative Example 2

[0052] This comparative example provides an oil-free and wax-free pore-minimizing stick, which differs from Example 4 only in that it does not contain higher fatty acid salts. Other raw materials, dosages, and preparation methods are the same as in Example 4.

[0053] Comparative Example 3

[0054] This comparative example provides an oil-free and wax-free pore-minimizing stick, which differs from Example 4 only in that no soft-focus oil-controlling agent is added. Other raw materials, dosages, and preparation methods are the same as in Example 4.

[0055] Comparative Example 4

[0056] This comparative example provides an oil-free and wax-free pore-minimizing stick, which differs from Example 4 only in that no moisturizer is added. Other raw materials, dosages, and preparation methods are the same as in Example 4.

[0057] Test Example 1

[0058] L&W Index Test

[0059] Incident light is reflected and scattered by the biological skin plate. Specularly reflected light retains the same polarization as the incident light, while scattered light (diffuse light) from this volume is unpolarized. The SAMBA polarization camera continuously acquires two images corresponding to the two polarization states (parallel and cross). The intensity (P) of the parallel image is contributed by both reflected and scattered light, while the intensity (C) of the cross image is contributed only by scattered light. The parallel image plus the cross image equals the total image delivered by a conventional camera or perceived by the human eye.

[0060] The glossiness of each pixel is calculated using the formula (PC) / (P+C). The standard deviation (STD) of glossiness is a measure of the evenness of skin appearance, and the two are inversely proportional. The L&W (wrinkles and lines) index indicates the degree of soft focus provided by the cosmetic composition involved and can be calculated using the following formula:

[0061] L&W (Low and Wrinkle) Index = [(STD of gloss before application - STD of gloss after application) / (STD of gloss before application)] × 100%. The L&W index test results of the pore concealing sticks prepared in each example and comparative example were tested immediately and at 8 hours. The average value of the results is taken and the results are shown in Table 2.

[0062] Test Example 2

[0063] Stability testing

[0064] The stability of the pore-minimizing sticks prepared in the examples and comparative examples was tested. They were placed at 25°C, -15°C, and 45°C, and subjected to thermal cycling for one month. The thermal cycling was specifically performed as follows: placed at 45°C for one day, then removed and placed at -15°C for one day, then removed and placed at 25°C for one day, and this cycle was repeated. The appearance of the pore-minimizing sticks was monitored during the process, and the results are shown in Table 3.

[0065] Table 2

[0066] Example 1 43.29 26.32 Example 2 9.38 -2.47 Example 3 58.33 38.62 Example 4 41.58 24.19 Example 5 38.69 19.94 Comparative Example 1 16.82 7.26 Comparative Example 2 24.33 6.27 Comparative Example 3 -56.23 -62.83 Comparative Example 4 42.19 9.43

[0067] Table 3

[0068]

[0069]

[0070] According to the data in the table, as shown in Examples 1 and 5, when the soft-focus oil-controlling agent is added first and then the higher fatty acid salt is added during the preparation process, the material tends to "sweat" and release water. As shown in Examples 4 and Comparative Example 1, when no polyol is added to the raw material, the soft-focus effect on concealing pores and fine lines is significantly worse, and the stability of the material also deteriorates. As shown in Examples 4 and Comparative Example 2, when no higher fatty acid salt is added to the raw material, the material is very thin, making it inconvenient to apply, and the overall effect of concealing pores is significantly reduced. Ultimately, the material tends to separate, affecting the performance. As shown in Examples 4 and Comparative Example 3, when no soft-focus oil-controlling agent is added to the raw material, there is almost no effect on concealing pores, and it cannot control oil. As shown in Examples 4 and Comparative Example 4, when no moisturizer is added to the raw material, the long-lasting oil control and pore-concealing effects of the material are significantly reduced.

[0071] The applicant declares that the present invention is illustrated by the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of raw materials for the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0072] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0073] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. An oil-free and wax-free pore-minimizing stick, characterized in that, The pore-minimizing stick does not contain oil or wax; The raw material of the pore-minimizing stick, by weight, consists of the following components: 32-60 parts of polyols 2-10 parts of higher fatty acid salts Soft-focus oil control agent 4-30 parts Moisturizer 0.6-10 parts Solvent 22-70 parts; The pore-minimizing stick is prepared by the following method: mixing polyol, moisturizer and solvent evenly, heating and stirring, adding higher fatty acid salt, dissolving and then adding soft-focus oil-controlling agent, dissolving evenly and then filling, cooling, to obtain the oil-free and wax-free pore-minimizing stick.

2. The oil-free and wax-free pore-minimizing stick according to claim 1, characterized in that, The polyols include any one or a combination of at least two of 1,3-propanediol, 1,3-butanediol, 1,2-propanediol, dipropylene glycol, 1,2-pentanediol, 1,2-hexanediol, methylpropanediol, or isopentanediol.

3. The oil-free and wax-free pore-minimizing stick according to claim 1, characterized in that, The higher fatty acid salts include any one or a combination of at least two of the following: sodium higher fatty acid, magnesium higher fatty acid, calcium higher fatty acid, and potassium higher fatty acid.

4. The oil-free and wax-free pore-minimizing stick according to claim 3, characterized in that, The higher fatty acid salts include any one or a combination of at least two of lauryl salts, palmitate salts, or stearate salts.

5. The oil-free and wax-free pore-minimizing stick according to claim 1, characterized in that, The soft-focus and oil-controlling agent includes any one or a combination of at least two of the following: organosilicon powder, silica, methyl methacrylate cross-linked polymer, polymethyl methacrylate, hydropyrite, bentonite, kaolin, or magnesium aluminum silicate.

6. The oil-free and wax-free pore-minimizing stick according to claim 5, characterized in that, The organosilicon powder includes any one or a combination of at least two of the following: polymethylsilsesquioxane, vinyl polydimethylsiloxane / polymethylsilsesquioxane crosslinked polymer, polydimethylsiloxane / vinyl polydimethylsiloxane crosslinked polymer, or divinyl polydimethylsiloxane / polydimethylsiloxane copolymer.

7. The oil-free and wax-free pore-minimizing stick according to claim 1, characterized in that, The moisturizing agent includes any one or a combination of at least two of the following: hyaluronic acid, sodium hyaluronate, hydrolyzed sodium hyaluronate, trehalose, betaine, panthenol, hydrolyzed glucosamine, or fucus vesiculosus extract.

8. The oil-free and wax-free pore-minimizing stick according to claim 1, characterized in that, The solvent includes any one or a combination of at least two of the following: purified water, witch hazel water, Melaleuca alternifolia leaf water, or rose water.

9. A method for preparing an oil-free and wax-free pore-minimizing stick as described in any one of claims 1-8, characterized in that, The preparation method includes: mixing polyol, moisturizer and solvent evenly, heating and stirring, adding high fatty acid salt, dissolving and then adding soft focus oil control agent, dissolving evenly and then discharging and filling, cooling, to obtain the oil-free and wax-free pore-concealing stick.

10. The preparation method according to claim 9, characterized in that, The heating and stirring temperature is 60-80℃.

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