Skin-attaching liquid foundation and preparation method thereof

Abstract

The invention discloses a skin-attaching liquid foundation and a preparation method thereof.The skin-attaching liquid foundation comprises a modified component A and a modified component B. The component A comprises flaky titanium dioxide, spherical titanium dioxide and spherical silicon dioxide. The components in the component A are fully grafted with a first coupling agent and then grafted with lauroyl lysine to obtain the modified component A; the first coupling agent comprises a silane coupling agent and a titanate coupling agent, the component B comprises spherical titanium dioxide, spherical silicon dioxide and inorganic toner, the components in the component B are fully grafted with a second coupling agent and then grafted with titanium isopropoxide triisostearate to obtain the modified component B, and the number of amino groups in molecules of the second coupling agent is larger than or equal to 2; the preparation method comprises the following steps: treating the component A, treating the component B and mixing. The skin-attaching liquid foundation provided by the invention has the effects of improving the fitness and prolonging the makeup duration.

Description

Technical Field

[0001] The present invention belongs to the technical field of cosmetics, and in particular relates to a skin-friendly liquid foundation and a preparation method thereof. Background Art

[0002] Liquid foundation is a cosmetic product used to adjust skin tone and conceal facial imperfections. It comes in a liquid or creamy form, has a light, easy-to-apply texture, and is used to even out skin tone, cover blemishes like freckles and blackheads, and provide moisturizing and oil-control properties.

[0003] As consumers' cosmetics requirements rise, the demand for long-lasting and skin-friendly liquid foundations has gradually become fundamental performance requirements. Long-lasting liquid foundations can extend the wear time of makeup, reduce makeup removal caused by oil secretion or sweat, and ensure that makeup remains intact for extended periods, meeting the needs of daily commutes, outdoor activities, and other scenarios. Skin-friendly liquid foundations, on the other hand, can enhance the naturalness of makeup, make skin appear more delicate and smooth, reduce the appearance of powder sticking and floating, and enhance the integration of makeup with skin.

[0004] Titanium dioxide and pigments are often used as ingredients in liquid foundation, working together to achieve a long-lasting and natural look.

[0005] Titanium dioxide is a highly effective physical sunscreen that effectively protects the skin from UV rays by reflecting and scattering them, particularly effectively blocking mid-wave UVB rays. Furthermore, its high covering power makes it an ideal concealer, evens skin tone, hides imperfections like freckles and acne scars, and creates a clear, natural-looking nude makeup effect. Nano-sized titanium dioxide, due to its small particle size and high activity, not only enhances makeup's staying power but also reduces dullness and enhances overall luminosity.

[0006] The primary function of pigments in liquid foundation is to adjust skin tone and enhance makeup. By mixing different pigment ratios, different skin tones can be met. For example, red iron oxide can enhance rosiness, while black iron oxide can deepen contours and create a more three-dimensional look. The fineness of pigments directly impacts makeup application. Micron-sized particles not only reduce sticking but also help foundation absorb oil, maintaining a fresh, fresh finish.

[0007] However, when titanium dioxide and color powder are used as liquid foundation ingredients, the following technical defects exist: ① Titanium dioxide's high specific surface area gives it a strong oil-absorbing ability. Initially, it can effectively absorb sebum and reduce shine. However, long-term effects can disrupt the skin's water-oil balance, stimulating the sebaceous glands to compensatory secretion of more oil, ultimately causing makeup to fade due to oil overflow and significantly reducing makeup wear time. ② Titanium dioxide has insufficient affinity with sebum. Without modification, it easily forms a repulsive interface with sebum, resulting in voids on the makeup surface and accelerating the makeup removal process. ③ Ordinary color powder lacks a porous structure or hydrophobic modification treatment, and cannot effectively absorb sebum, causing oil to penetrate into the gaps between the powders and destroy the integrity of the makeup. ④ If titanium dioxide and color powder are not compatible with oil-phase ingredients (such as silicone oil), they are likely to cause stratification or precipitation, seriously affecting the makeup's adherence; ⑤ In the coexistence system of titanium dioxide and color powder, competitive adsorption of oil and surfactant may occur, resulting in some powders not being fully wrapped, increasing the friction between particles during application, and ultimately affecting the makeup's adherence effect. Summary of the Invention

[0008] In view of the deficiencies in the prior art, the present invention aims to provide a skin-friendly liquid foundation and a preparation method thereof.

[0009] To achieve the aforementioned object of the invention, the technical solutions adopted by the present invention include: In one aspect, a skin-friendly liquid foundation comprises the following components: 80 parts water, 4-8 parts of modified A component, 3-4 parts of modified B component, Dispersant 0.1-0.5 parts; 5-10 parts hydrogenated lecithin 6-8 parts of moisturizer, 1-3 parts of emollient, 4-6 parts of cyclopentasiloxane, 6-9 parts of trimethylsiloxysilicate, 2-3 parts of ethanol, 1.5-3 parts of additives; The A component includes flaky titanium dioxide (TiO2), spherical titanium dioxide and spherical silicon dioxide (SiO2), and the components in the A component are fully grafted with a first coupling agent and then grafted with lauroyl lysine (LLA) to obtain a modified A component, wherein the first coupling agent includes a silane coupling agent and a titanate coupling agent; The B component includes spherical titanium dioxide, spherical silicon dioxide and inorganic color powder. The components in the B component are fully grafted with a second coupling agent and then grafted with isopropyl titanium triisostearate (TTS) to obtain a modified B component. The number of amino groups in the molecule of the second coupling agent is ≥2.

[0010] In the present invention, the pre-grafting process forms a stable organic functional layer on the powder surface through chemical bonding. Compared with the direct mixing process, the coupling agent will not fall off from the powder surface due to mechanical shearing or ambient humidity, and the powder modification has good directional modification. The pre-grafting strategy in the process avoids the uneven coverage problem caused by competitive adsorption of the coupling agent during direct mixing, making the modification effect more controllable.

[0011] In the present invention, LLA reduces the interfacial tension between the powder and the skin through bioaffinity, and enhances the biocompatibility between the powder and the skin's sebum membrane through molecular-level skin-friendly anchoring, thereby improving the adherence of the skin-friendly liquid foundation.

[0012] The modification of TTS focuses on chemical bond strengthening and functional synergy to form a stable chemical bond network, which is beneficial to enhancing the anti-shear and anti-migration capabilities of the liquid foundation after film formation, thereby improving the durability of the liquid foundation.

[0013] In this invention, after mixing modified components A and B, the titanate groups of TTS condense with the hydroxyl groups on the powder surface to form a rigid skeleton, while the long-chain alkyl groups of LLA provide flexible support through physical entanglement. This structure not only enhances the compatibility of the powder with oil-phase matrices (such as silicone oils and esters), but also promotes the coordinated dispersion of different powders through a "molecular bridge" effect, which helps improve the uniformity of the skin-friendly liquid foundation.

[0014] In the present invention, the nanoscale particle size of flaky titanium dioxide gives it a higher specific surface area and surface activity, which can form a tight anchor with the lipids in the skin's stratum corneum through intermolecular forces, reducing membrane rupture caused by facial expressions or sebum secretion, thereby significantly improving the bonding strength and helping to improve the durability of the skin-friendly foundation.

[0015] Preferably, in the component A, the particle size of the flaky titanium dioxide is 5-50 μm.

[0016] Preferably, in the component A, the particle sizes of the spherical titanium dioxide and the spherical silicon dioxide are both 100-150 μm.

[0017] Preferably, in the component B, the particle sizes of the spherical titanium dioxide and the spherical silicon dioxide are both 200-300 μm.

[0018] In the present invention, the particle size of flaky titanium dioxide is much smaller than that of spherical titanium dioxide, the specific surface area of flaky TiO2 is greatly increased, and the unsaturated state of surface atomic coordination makes it easier to form molecular-level anchoring with the lipid components of the skin's stratum corneum, thereby enhancing the bonding strength through hydrogen bonds and van der Waals forces. Flaky TiO2 is easier to adhere to the skin, effectively reducing the powder floating phenomenon caused by facial expressions or sebum secretion.

[0019] In this invention, the small particle size of flaky titanium dioxide optimizes chemical bonding efficiency with the coupling agent. Rapid hydrolysis and condensation of surface hydroxyl groups form a stable organic-inorganic hybrid interface, further enhancing anti-migration performance. The oleophobic barrier of spherical titanium dioxide dynamically regulates the rate of oil adsorption through the eutectic effect between isostearic acid chains and sebum components, forming an intelligent oil-control film and reducing shine. This complementary mechanism not only strengthens the three-dimensional network structure of the dispersion but also regulates interparticle interactions through interfacial energy differences, preventing agglomeration caused by mechanical shear and ensuring a uniform and smooth foundation texture.

[0020] Preferably, in the component A, the mass ratio of the sum of the mass of flaky titanium dioxide and spherical titanium dioxide to the mass of spherical silicon dioxide is a1; in the first coupling agent, the mass ratio of the titanate coupling agent to the silane coupling agent is a2, and a2≥a1.

[0021] In the present invention, the titanate coupling agent is selected from isopropyl tri(isostearoyl) titanate (KR-TTS) and bis(dioctyl pyrophosphoryl) titanium oxyacetate (KR-138S), and the silane coupling agent is selected from γ-glycidyloxypropyltrimethoxysilane (KH-560) and γ-methacryloxypropyltrimethoxysilane (KH-570).

[0022] Preferably, the second coupling agent is selected from one or more of N-β-aminoethyl-γ-aminopropyltrimethoxysilane (KH-792), N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane (KH-602), N-β-aminoethyl-γ-aminopropyltriethoxysilane (KH-791), N-β-aminoethyl-γ-aminopropylmethyldiethoxysilane, and γ-aminoethylaminopropyltrimethoxysilane.

[0023] In the present invention, the second coupling agent is specifically selected from N-β-aminoethyl-γ-aminopropyltrimethoxysilane and γ-aminoethylaminopropyltrimethoxysilane.

[0024] Preferably, the mass ratio of the component A to the lauroyl lysine is (3-5):100.

[0025] Preferably, the mass ratio of the component B to the isopropyl titanium triisostearate is (4-6):100.

[0026] Preferably, the dispersant is selected from one or both of polydimethylsiloxane and sodium lauryl sulfate.

[0027] Preferably, the moisturizing agent is selected from one or both of propylene glycol and ceramide.

[0028] Preferably, the emollient is selected from one or both of jojoba oil and caprylic / capric triglyceride.

[0029] Preferably, the mass of the flaky titanium dioxide in the component A accounts for 0.5%-1% of the component A.

[0030] On the other hand, a method for preparing a skin-friendly liquid foundation comprises the following steps: Treatment of component A: Component A is mixed with water, the first coupling agent is added, and then the reaction is carried out at 25-30 kHz for 1.5-2 hours, followed by filtration. The filtered solid is then washed and mixed with water again, lauroyl lysine is added, and the reaction is carried out at 60-75°C for 8-10 hours, followed by filtration. The filtered solid is then dried to obtain the modified component A. Treating component B: mixing component B with water, adding isopropyl titanium triisostearate and a second coupling agent, and adjusting the pH to 7, then treating at 25-30 kHz and 60-75° C. for 1.5-2 hours, and then drying to obtain a modified component B; Mixing preparation: Mix water, modified component A, modified component B, dispersant, hydrogenated lecithin, moisturizer, emollient, cyclopentasiloxane and trimethylsiloxysilicate, then emulsify at 65-75°C. After the temperature drops to 30-35°C, add ethanol and additives, stir evenly, and you will get the skin-friendly liquid foundation.

[0031] Preferably, in the mixing preparation step, the stirring speed of the emulsification is ≥3000 rpm / min.

[0032] Preferably, in the mixing preparation step, the stirring speed after adding ethanol and the auxiliary agent is 1000-1500 rpm / min.

[0033] In this invention, lauroyl lysine (LLA) grafted onto flaky titanium dioxide (TiO2) creates a unique layered structure that forms a dense, directional reflective layer on the skin's surface. This not only significantly enhances concealing effectiveness but also, through the long hydrophobic chains of LLA, forms a strong bond with the sebum membrane, significantly enhancing the adherence of foundation. The modified TiO2 particles significantly reduce surface energy, perfectly blending with skin texture, effectively preventing powder floating and makeup fading, and achieving a long-lasting finish. Furthermore, the smooth properties of LLA allow the powder to spread evenly across the skin, forming a thin, breathable membrane structure that maintains high concealing power while ensuring comfortable adherence.

[0034] In this invention, spherical titanium dioxide (TiO2) is modified with LLA grafting, forming a uniform hydrophobic protective layer on the surface of the nanoparticles. This significantly enhances the affinity for sebum, allowing the sunscreen ingredients to adhere firmly to the skin. This molecular-level bonding significantly extends the duration of UV protection, maintaining stable protection even in high-temperature and high-humidity environments. The modified TiO2 forms a three-dimensional network structure within the formula, enhancing the transfer resistance of the liquid foundation through physical anchoring. Combined with the antioxidant properties of LLA, this helps maintain a long-lasting, non-dull finish.

[0035] In this invention, spherical silica (SiO2) grafted with LLA enhances its porous structure's ability to bind to sebum, strongly absorbing excess oil through capillary action while forming a breathable, long-lasting makeup film. The modified SiO2's surface charge optimally matches the skin's, achieving molecular-level adhesion and maintaining a flawless matte finish even on oily areas. LLA's amino acid structure not only controls oil but also creates a moisturizing buffer, ensuring that foundation maintains its initial adherence over time.

[0036] In this invention, the spherical titanium dioxide modified with isopropyl titanium triisostearate has long isostearic acid chains grafted onto its surface, forming a stable bond with sebum components, significantly enhancing the adhesion of the sunscreen particles to the skin. This unique technology ensures that the sunscreen ingredients maintain excellent adhesion under various conditions, achieving a long-lasting effect. The modified TiO2 forms a dynamic cross-linked network within the formula, automatically adjusting the film's elasticity with skin movement, preventing problems such as streaking and line buildup over time.

[0037] In this invention, the spherical silica modified with isopropyl titanium triisostearate creates a surface isostearic acid chain that specifically binds to sebum, forming a highly effective oil-control film. This film dynamically adjusts its adsorption rate based on skin oil production, maintaining a matte finish over time. The flexible interface created by the coupling agent allows the powder to expand and contract naturally with facial expressions, ensuring stable, long-lasting makeup even during exercise.

[0038] The inorganic color powder modified with isopropyl titanium triisostearate in this invention forms titanium-to-color coordination bonds on its surface that resist erosion by sweat, significantly improving color fastness. The modified color powder's isostearic acid chains stabilize the sebum, permanently anchoring the color molecules to the skin's surface. This unique synergistic system creates a more natural-looking finish over time, avoiding the oxidative discoloration problem associated with traditional foundations.

[0039] The introduction of some raw materials in the present invention is as follows: As a dispersant, polydimethylsiloxane, thanks to its unique siloxane chemical structure, exhibits excellent dispersing properties in oil-in-water systems. Its low surface tension effectively reduces interparticle interactions, preventing agglomeration and ensuring uniform distribution of active ingredients. Its hydrophobic nature ensures excellent compatibility with oil-phase components, while its high extensibility imparts a light, silky feel to the formula, avoiding the heaviness associated with traditional mineral oils. Its chemical stability maintains its performance over a wide temperature range, making it suitable for products operating under diverse environmental conditions. Its physiological inertness ensures gentleness on the skin, making it suitable for sensitive skin formulations. Furthermore, it can be temporarily rendered hydrophilic through plasma treatment, enhancing compatibility with polar ingredients.

[0040] Sodium lauryl sulfate, an anionic surfactant, serves as a dispersant. Its excellent emulsifying and foaming abilities make it a key dispersant in oil-in-water systems. The polar groups and long non-polar chains in its molecular structure allow it to interact with both the aqueous and oil phases, effectively reducing interfacial tension and promoting uniform mixing of immiscible ingredients. Its excellent biodegradability and stability in hard water make it suitable for use in a variety of personal care products. Its rapid decontamination capabilities help remove oil and impurities from the skin's surface, while charge repulsion prevents particle reaggregation, ensuring the long-term dispersion stability of active ingredients.

[0041] Propylene glycol, a small molecule polyol, acts as a humectant. Its strong hygroscopicity allows it to capture moisture from the environment and lock it onto the skin's surface through hydrogen bonds, delivering an immediate moisturizing effect. Compared to traditional glycerin, it offers lower viscosity and a lighter feel, making it suitable for use in lightweight products. Its dihydroxy structure imparts excellent penetration, allowing it to carry other active ingredients deep into the stratum corneum, enhancing the overall absorption efficiency of the formula. Its chemical stability ensures its performance across a wide pH range, making it less susceptible to degradation by acids and bases in the formula, making it suitable for use in a wide range of skincare products.

[0042] Ceramides, as moisturizers, are a major component of lipids in the skin's stratum corneum. Their unique double-chain molecular structure enables them to spontaneously form lamellar liquid crystal structures, effectively repairing a damaged skin barrier. Biomimetic lipids not only reduce transepidermal water loss but also enhance the hydration capacity of the stratum corneum by promoting the expression of filaggrin, achieving long-lasting moisturization. Their physiological compatibility makes them easier for the skin to recognize and utilize, making them particularly suitable for dry, sensitive, or barrier-damaged skin. Some subclasses also possess antioxidant properties, potentially delaying skin aging.

[0043] As an emollient, jojoba oil's chemical composition is highly similar to human sebum, primarily composed of long-chain fatty acid esters, giving it excellent skin-compatibility. Its lightweight, liquid form makes it easy to spread without forming an occlusive film on the skin's surface, making it suitable for oily skin or use in hot climates. Its excellent stability makes it resistant to oxidation and rancidity, ensuring long-lasting moisturizing effects. Its penetrating properties surpass those of traditional plant oils, allowing it to penetrate deeply into the stratum corneum to replenish lipids while regulating sebum secretion to balance skin conditions, delivering both moisturizing and soothing benefits.

[0044] Caprylic / capric triglyceride, an emollient derived from coconut or palm oil, has a short-chain fatty acid structure that imparts an exceptionally refreshing feel and rapid penetration. It forms a breathable, moisturizing barrier on the skin's surface, locking in moisture without hindering sebum secretion, making it suitable for oily and combination skin types. Its chemical inertness makes it less reactive with other ingredients in the formula, providing high stability and natural antioxidant properties that protect the skin from free radical damage. Its low viscosity improves the spreadability of creams and enhances smooth application.

[0045] Compared with the prior art, the advantages of the present invention include: (1) The present invention provides a skin-friendly liquid foundation, in which flaky titanium dioxide forms a parallel arrangement on the skin surface. Compared with spherical particles that directly contact the skin, flaky titanium dioxide is lighter and more adherent, which helps to reduce powder floating and prolong the makeup lasting time; (2) The present invention provides a skin-fitting liquid foundation, in which a portion of spherical titanium dioxide and spherical silica are pre-grafted with lauroyl lysine, and a portion of spherical titanium dioxide, spherical silica, and inorganic color powder are pre-grafted with isopropyl titanium triisostearate. Compared with directly mixing spherical titanium dioxide, spherical silica, inorganic color powder with lauroyl lysine and isopropyl titanium triisostearate, the pre-grafting process achieves precise control of the surface properties of the powder through chemical bonding and directional modification, which is beneficial to improving the fit and makeup-lasting time of the skin-fitting liquid foundation. DETAILED DESCRIPTION

[0046] To help those skilled in the art understand the features and effects of this application, the following provides a general description and definition of the terms and expressions used in the specification and claims. Unless otherwise indicated, all technical and scientific terms used herein have the ordinary meanings understood by those skilled in the art in connection with this application. In the event of any conflict, the definitions in this specification shall prevail.

[0047] The theories or mechanisms described and disclosed herein, whether correct or incorrect, should not limit the scope of this application in any way, that is, the content of this application can be implemented without being limited by any specific theory or mechanism.

[0048] As used herein, "this application" refers to "the present invention" or "this disclosure."

[0049] Where "a," "an," or similar expressions are used herein to describe components and technical features described herein, such descriptions are merely for convenience and to provide a general sense of the scope of this application. Therefore, such descriptions should be understood to include one or at least one, and the singular also includes the plural, unless it is obvious that another meaning is intended.

[0050] In this document, "or a combination thereof" means "or any combination thereof", and "any one", "any one", and "any one" means "any one", "any one", and "any one".

[0051] As used herein, the terms "comprising," "including," "having," "containing," and any similar terms are open-ended transitional phrases, intended to encompass a non-exclusive inclusion. For example, a composition or article comprising multiple elements is not limited to the elements listed herein but may also include other elements not specifically listed but customary to the composition or article. Furthermore, unless expressly stated to the contrary, the term "or" is intended to be inclusive, not exclusive. For example, the condition "A or B" is satisfied by any of the following: A is true (or present) and B is false (or absent); A is false (or absent) and B is true (or present); and both A and B are true (or present). Furthermore, as used herein, the terms "comprising," "including," "having," and "containing" are to be construed as specifically disclosing and encompassing closed transitional phrases such as "consisting of," "consisting of," and "the remainder of," as well as transitional phrases such as "consisting essentially of," "consisting primarily of," "consisting primarily of," "consisting essentially of," "consisting essentially of," "consisting essentially of," and "essentially containing."

[0052] Throughout this document, all features or conditions, such as values, amounts, amounts, and concentrations, defined in numerical ranges or percentage ranges are for simplicity and convenience only. Accordingly, descriptions of numerical ranges or percentage ranges should be considered to include and specifically disclose all possible subranges and individual values within those ranges (including integers and fractions), particularly integer values. For example, descriptions of ranges such as "1.0 to 8.0," "between 1.0 and 8.0," or "between 1.0 and 8.0" should be considered to specifically disclose all subranges such as 1.0 to 8.0, 1.0 to 7.0, 2.0 to 8.0, 2.0 to 6.0, 3.0 to 6.0, 4.0 to 8.0, 3.0 to 8.0, and so forth, and should be considered to include endpoints, particularly subranges defined by integer values, and should be considered to specifically disclose individual values within those ranges such as 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, and 8.0. Unless otherwise indicated, the above interpretation method applies to all contents of the entire application, regardless of the scope.

[0053] If the quantity, concentration or other numerical value or parameter is expressed as a range, a preferred range (or a better range) or a series of upper and lower limits, it should be understood that all ranges consisting of any pair of the upper limit or preferred value (or better value) of the range and the lower limit or preferred value (or better value) of the range have been specifically disclosed herein, regardless of whether these ranges are disclosed separately. In addition, when a numerical range is mentioned herein, unless otherwise specified, the range should include its endpoints and all integers and fractions within the range.

[0054] In this document, numerical values should be understood to have the accuracy of the number of significant digits of the numerical value, provided that the purpose of the invention can be achieved. For example, the number 40.0 should be understood to cover the range of 39.50 to 40.49.

[0055] Unless otherwise specified, parts by weight in this application represent relative parts by weight in a composition and may be any weight unit, such as, but not limited to, kilograms, grams, pounds, etc. For example, 100 parts by weight of polyphenylene ether resin may represent 100 kilograms of polyphenylene ether resin or 100 pounds of polyphenylene ether resin.

[0056] It should be understood that the features disclosed in the various embodiments herein may be arbitrarily combined to form the technical solution of the present application, as long as there is no contradiction in the combination of these features.

[0057] The present application will be described below with specific embodiments and examples. It should be understood that these specific embodiments and examples are merely illustrative and are not intended to limit the scope of the present application and its use.

[0058] Unless otherwise stated, the methods, reagents and conditions used in the following preparation examples, comparative examples and examples are conventional methods, reagents and conditions in the art.

[0059] In the following descriptions: Flaky titanium dioxide: loss on ignition (volatile-free, 800°C) ≤1%, water-soluble salt ≤0.5%, available in three specifications: particle size 50μm thickness 500nm, particle size 20μm thickness 200nm, particle size 5μm thickness 100nm.

[0060] Iron oxide red (CI 77491): purity ≥99.5%.

[0061] Iron oxide yellow (CI 77492): purity ≥99.5%.

[0062] γ-Aminopropyltriethoxysilane (KH-550): Active ingredient ≥99%.

[0063] Preparation Example Preparation Example 1 The raw materials used in this preparation example are calculated by weight and include: 0.5 parts of flaky titanium dioxide with a particle size of 50 μm and a thickness of 500 nm, 2.5 parts of spherical titanium dioxide with a particle size of 100 μm, 7 parts of spherical silicon dioxide with a particle size of 150 μm, 4.5 parts of KR-TTS, 10.5 parts of KH-560, and 0.3 parts of lauroyl lysine.

[0064] The preparation method of this preparation example includes: Z1. Mix flaky titanium dioxide, spherical titanium dioxide, spherical silicon dioxide, KR-TTS, and KH-560 in 10 parts of water, then treat at 25 kHz for 2 hours and filter to obtain a solid; Z2. After washing the filtered solid with water, mix it with 10 parts of water, add lauroyl lysine, react at 60°C for 10 hours and then filter; dry the filtered solid at 45°C for 15 hours to obtain a modified A component.

[0065] Preparation Example 2 The difference between this preparation example and preparation example 1 is that the amount of flaky titanium dioxide used in the raw materials used in this preparation example is 0.8 parts, and the amount of KR-TTS used is 4.95 parts.

[0066] Preparation Example 3 The difference between this preparation example and preparation example 1 is that the amount of flaky titanium dioxide used in the raw materials used in this preparation example is 1 part, and the amount of KR-TTS used is 5.25 parts.

[0067] Preparation Example 4 The raw materials used in this preparation example are calculated by weight and include: 0.5 parts of flaky titanium dioxide with a particle size of 50 μm and a thickness of 500 nm, 4.5 parts of spherical titanium dioxide with a particle size of 150 μm, 4.5 parts of spherical silicon dioxide with a particle size of 100 μm, 8 parts of KR-138S, 6.75 parts of KH-570, and 0.4 parts of lauroyl lysine.

[0068] The preparation method of this preparation example includes: Z1. Mix flaky titanium dioxide, spherical titanium dioxide, spherical silicon dioxide, KR-138S, and KH-570 in 10 parts of water, then treat at 30 kHz for 1.5 hours and filter to obtain a solid; Z2. After washing the filtered solid with water, mix it with 10 parts of water, add lauroyl lysine, react at 75°C for 8 hours and then filter; dry the filtered solid at 45°C for 15 hours to obtain modified component A.

[0069] Preparation Example 5 The difference between this preparation example and preparation example 4 is that the raw material used in this preparation example has a flaky titanium dioxide particle size of 20 μm and a thickness of 200 nm.

[0070] Preparation Example 6 The difference between this preparation example and preparation example 4 is that the raw material used in this preparation example has a flaky titanium dioxide particle size of 5 μm and a thickness of 100 nm.

[0071] Preparation Example 7 The raw materials used in this preparation example are calculated by weight and include: 0.5 parts of flaky titanium dioxide with a particle size of 50 μm and a thickness of 500 nm, 4 parts of spherical titanium dioxide with a particle size of 100 μm, 4.5 parts of spherical silicon dioxide with a particle size of 150 μm, 3.6 parts of KR-TTS, 4.05 parts of KR-138S, 3.15 parts of KH-560, 4.05 parts of KH-570, and 0.3 parts of lauroyl lysine.

[0072] The preparation method of this preparation example includes: Z1. Mix flaky titanium dioxide, spherical titanium dioxide, spherical silicon dioxide, KR-TTS, KR-138S, KH-560, and KH-570 in 10 parts of water, then treat at 25 kHz for 2 hours and filter to obtain a solid; Z2. After washing the filtered solid with water, mix it with 10 parts of water, add lauroyl lysine, react at 60°C for 10 hours and then filter; dry the filtered solid at 45°C for 15 hours to obtain a modified A component.

[0073] Preparation Example 8 The difference between this preparation example and preparation example 7 is that the amount of lauroyl lysine used in the raw materials used in this preparation example is 0.4 parts.

[0074] Preparation Example 9 The difference between this preparation example and preparation example 7 is that the amount of lauroyl lysine used in the raw materials used in this preparation example is 0.5 parts.

[0075] Table 1 Differences in raw materials used in Preparation Examples 1-9 Preparation Example 10 The raw materials used in this preparation example are calculated by weight and include: 3 parts of spherical titanium dioxide with a particle size of 200 μm, 6 parts of spherical silicon dioxide with a particle size of 300 μm, 0.5 parts of CI 77491 with a particle size of 200 μm, 0.5 parts of CI 77492 with a particle size of 200 μm, 15 parts of KH-792, and 0.4 parts of isopropyl titanium triisostearate.

[0076] The preparation method of this preparation example includes: Spherical titanium dioxide, spherical silicon dioxide, CI 77491, CI 77492, KH-792, and isopropyl titanium triisostearate were mixed in 10 parts of water, the pH was adjusted to 7, and then treated at 25 kHz and 75° C. for 2 hours, and then dried at 45° C. for 24 hours to obtain a modified B component.

[0077] Preparation Example 11 The difference between this preparation example and preparation example 10 is that the amount of isopropyl titanium triisostearate in the raw materials used in this preparation example is 0.5 parts.

[0078] Preparation Example 12 The difference between this preparation example and preparation example 10 is that the amount of isopropyl titanium triisostearate in the raw materials used in this preparation example is 0.6 parts.

[0079] Preparation Example 13 The raw materials used in this preparation example are calculated by weight and include: 6 parts of spherical titanium dioxide with a particle size of 300 μm, 3 parts of spherical silicon dioxide with a particle size of 200 μm, 0.5 parts of CI 77491 with a particle size of 300 μm, 0.5 parts of CI 77492 with a particle size of 300 μm, 15 parts of γ-aminoethylaminopropyltrimethoxysilane, and 0.4 parts of isopropyl titanium triisostearate.

[0080] The preparation method of this preparation example includes: Spherical titanium dioxide, spherical silicon dioxide, CI 77491, CI 77492, γ-aminoethylaminopropyltrimethoxysilane, and isopropyl titanium triisostearate were mixed in 10 parts of water, the pH was adjusted to 7, and then the mixture was treated at 25 kHz and 75° C. for 2 hours, and then dried at 45° C. for 24 hours to obtain a modified component B.

[0081] Preparation Example 14 The raw materials used in this preparation example are calculated by weight and include: 3.5 parts of spherical titanium dioxide with a particle size of 200 μm, 6 parts of spherical silicon dioxide with a particle size of 300 μm, 0.25 parts of CI 77491 with a particle size of 200 μm, 0.25 parts of CI 77492 with a particle size of 200 μm, 7 parts of KH-792, 8 parts of γ-aminoethylaminopropyltrimethoxysilane, and 0.4 parts of isopropyl titanium triisostearate.

[0082] The preparation method of this preparation example includes: Spherical titanium dioxide, spherical silicon dioxide, CI 77491, CI 77492, KH-792, γ-aminoethylaminopropyltrimethoxysilane, and isopropyl titanium triisostearate were mixed in 10 parts of water, the pH was adjusted to 7, and then treated at 25 kHz and 75°C for 2 hours, and then dried at 45°C for 24 hours to obtain a modified B component.

[0083] Table 2 Differences in raw materials used in Preparation Examples 10-14 Preparation Example 15 The difference between this preparation example and preparation example 1 is that the preparation method of this preparation example includes: At 25° C., flaky titanium dioxide, spherical titanium dioxide, spherical silicon dioxide, KR-TTS, KH-560, and lauroyl lysine were uniformly mixed to obtain a modified A component.

[0084] Preparation Example 16 The difference between this preparation example and preparation example 10 is that the preparation method of this preparation example includes: Spherical titanium dioxide, spherical silicon dioxide, CI 77491, CI 77492, KH-792, and isopropyl titanium triisostearate are uniformly mixed to obtain a modified B component.

[0085] Preparation Example 17 The difference between this preparation example and preparation example 1 is that in this preparation example, 3 parts of spherical titanium dioxide with a particle size of 100 μm are added, and no flaky titanium dioxide is added.

[0086] Preparation Example 18 The difference between this preparation example and preparation example 1 is that the particle size of the spherical titanium dioxide and spherical silicon dioxide in this preparation example is both 250 μm.

[0087] Preparation Example 19 The difference between this preparation example and preparation example 1 is that the raw materials used in this preparation example do not contain lauroyl lysine.

[0088] Preparation Example 20 The difference between this preparation example and preparation example 1 is that in this preparation example, the amount of KR-TTS used is 15 parts, and KH-560 is not added.

[0089] Preparation Example 21 The difference between this preparation example and preparation example 1 is that in this preparation example, the amount of KH-560 used is 15 parts, and KR-TTS is not added.

[0090] Preparation Example 22 The difference between this preparation example and preparation example 10 is that the particle sizes of spherical titanium dioxide, spherical silicon dioxide, CI 77491 and CI 77492 are all 100 μm.

[0091] Preparation Example 23 The difference between this preparation example and preparation example 10 is that the raw materials used in this preparation example do not contain isopropyl titanium triisostearate.

[0092] Preparation Example 24 The difference between this preparation example and preparation example 10 is that KH-550 is used instead of KH-792 in the raw materials used in this preparation example.

[0093] Example Example 1 The raw materials used in this example include: 80 parts of water, 4 parts of modified component A obtained in Preparation Example 1, 3 parts of modified component B obtained in Preparation Example 10, 0.5 parts of polydimethylsiloxane, 6 parts of propylene glycol, 1 part of jojoba oil, 5 parts of hydrogenated lecithin, 4 parts of cyclopentasiloxane, 6 parts of trimethylsiloxysilicate, 2 parts of ethanol, 0.7 parts of phenoxyethanol, 0.7 parts of hydroxyethyl cellulose, and 0.1 parts of lavender oil.

[0094] The preparation method of this embodiment includes: S1. Mix water, modified component A, modified component B, polydimethylsiloxane, propylene glycol, jojoba oil, hydrogenated lecithin, cyclopentasiloxane, and trimethylsiloxysilicate, and stir and emulsify at 65° C. and 3000 rpm / min for 25 min. S2. After the temperature drops to 30°C, add ethanol, phenoxyethanol, hydroxyethyl cellulose, and lavender oil, and then stir at a stirring speed of 1000 rpm / min for 3 minutes to obtain a skin-friendly liquid foundation.

[0095] Example 2 The difference between this embodiment and embodiment 1 is that the amount of modified component A in the raw materials used in this embodiment is 6 parts.

[0096] Example 3 The difference between this embodiment and embodiment 1 is that the amount of modified component A in the raw materials used in this embodiment is 8 parts.

[0097] Example 4 The difference between this embodiment and embodiment 1 is that the modified component A in the raw materials used in this embodiment comes from preparation example 2, and the modified component B comes from preparation example 13.

[0098] Example 5 The difference between this embodiment and embodiment 1 is that the modified component A in the raw materials used in this embodiment comes from preparation example 3, and the modified component B comes from preparation example 13.

[0099] Example 6 The raw materials used in this embodiment include: 80 parts of water, 4 parts of modified component A obtained in Preparation Example 1, 3 parts of modified component B obtained in Preparation Example 14, 0.1 parts of sodium lauryl sulfate, 8 parts of ceramide, 3 parts of capric triglyceride, 10 parts of hydrogenated lecithin, 6 parts of cyclopentasiloxane, 9 parts of trimethylsiloxysilicate, 3 parts of ethanol, 1.4 parts of phenoxyethanol, 1.4 parts of hydroxyethyl cellulose, and 0.2 parts of lavender oil.

[0100] The preparation method of this embodiment includes: S1. Mix water, modified component A, modified component B, sodium lauryl sulfate, ceramide, capric triglyceride, hydrogenated lecithin, cyclopentasiloxane, and trimethylsiloxysilicate, and stir and emulsify at 75°C and a stirring speed of 3500 rpm / min for 20 min. S2. After the temperature drops to 35°C, add ethanol, phenoxyethanol, hydroxyethyl cellulose, and lavender oil, and then stir at a stirring speed of 1500 rpm / min for 2 minutes to obtain a skin-friendly liquid foundation.

[0101] Example 7 The difference between this embodiment and embodiment 6 is that the amount of modified component B in the raw materials used in this embodiment is 3.5 parts.

[0102] Example 8 The difference between this embodiment and embodiment 6 is that the amount of modified component B in the raw materials used in this embodiment is 4 parts.

[0103] Example 9 The difference between this embodiment and embodiment 1 is that the modified B component in the raw materials used in this embodiment comes from Preparation Example 11.

[0104] Example 10 The difference between this embodiment and embodiment 1 is that the modified B component in the raw materials used in this embodiment comes from Preparation Example 12.

[0105] Example 11 The raw materials used in this embodiment include: 80 parts of water, 4 parts of modified component A obtained in Preparation Example 4, 3 parts of modified component B obtained in Preparation Example 10, 0.2 parts of polydimethylsiloxane, 0.3 parts of sodium lauryl sulfate, 3.5 parts of propylene glycol, 3.5 parts of ceramide, 1 part of jojoba oil, 1 part of capric triglyceride, 8 parts of hydrogenated lecithin, 5 parts of cyclopentasiloxane, 8 parts of trimethylsiloxysilicate, 2.5 parts of ethanol, 0.7 parts of phenoxyethanol, 0.7 parts of hydroxyethyl cellulose, and 0.1 parts of lavender oil.

[0106] The preparation method of this embodiment includes: S1. Mix water, modified component A, modified component B, dimethicone, sodium lauryl sulfate, propylene glycol, ceramide, jojoba oil, capric triglyceride, hydrogenated lecithin, cyclopentasiloxane, and trimethylsiloxysilicate, and emulsify the mixture at 65° C. and a stirring speed of 3000 rpm / min for 25 min. S2. After the temperature drops to 30°C, add ethanol, phenoxyethanol, hydroxyethyl cellulose, and lavender oil, and then stir at a stirring speed of 1000 rpm / min for 3 minutes to obtain a skin-friendly liquid foundation.

[0107] Example 12 The difference between this embodiment and embodiment 11 is that the modified component A in the raw materials used in this embodiment comes from Preparation Example 5.

[0108] Example 13 The difference between this example and Example 11 is that the modified A component in the raw materials used in this example comes from Preparation Example 6.

[0109] Example 14 The difference between this embodiment and embodiment 11 is that the modified component A in the raw materials used in this embodiment comes from Preparation Example 7.

[0110] Example 15 The difference between this embodiment and embodiment 11 is that the modified A component in the raw materials used in this embodiment comes from Preparation Example 8.

[0111] Example 16 The difference between this embodiment and embodiment 11 is that the modified component A in the raw materials used in this embodiment comes from Preparation Example 9.

[0112] Table 3 Differences in raw materials used in Examples 1-16 Comparative Example Comparative Example 1 The raw materials used in this comparative example include: 80 parts of water, 4 parts of modified component A obtained in Preparation Example 15, 3 parts of modified component B obtained in Preparation Example 16, 0.5 parts of polydimethylsiloxane, 6 parts of propylene glycol, 1 part of jojoba oil, 5 parts of hydrogenated lecithin, 4 parts of cyclopentasiloxane, 6 parts of trimethylsiloxysilicate, 2 parts of ethanol, 0.7 parts of phenoxyethanol, 0.7 parts of hydroxyethyl cellulose, and 0.1 parts of lavender oil.

[0113] The preparation method of this comparative example comprises: D1. Mix water, modified component A, modified component B, dimethicone, propylene glycol, jojoba oil, hydrogenated lecithin, cyclopentasiloxane, and trimethylsiloxysilicate, and emulsify at 65°C and 3000 rpm / min for 25 min. D2. After the temperature drops to 30°C, add ethanol, phenoxyethanol, hydroxyethyl cellulose, and lavender oil, and then stir at a stirring speed of 1000 rpm / min for 3 minutes to obtain a skin-friendly liquid foundation.

[0114] Comparative Example 2 The difference between this comparative example and Example 1 is that component A in the raw materials used in this comparative example comes from Preparation Example 17.

[0115] Comparative Example 3 The difference between this comparative example and Example 1 is that component A in the raw materials used in this comparative example comes from Preparation Example 18.

[0116] Comparative Example 4 The difference between this comparative example and Example 1 is that component A in the raw materials used in this comparative example comes from Preparation Example 19.

[0117] Comparative Example 5 The difference between this comparative example and Example 1 is that component A in the raw materials used in this comparative example comes from Preparation Example 20.

[0118] Comparative Example 6 The difference between this comparative example and Example 1 is that component A in the raw materials used in this comparative example comes from Preparation Example 21.

[0119] Comparative Example 7 The difference between this comparative example and Example 1 is that component A in the raw materials used in this comparative example comes from Preparation Example 22.

[0120] Comparative Example 8 The difference between this comparative example and Example 1 is that component A in the raw materials used in this comparative example comes from Preparation Example 23.

[0121] Comparative Example 9 The difference between this comparative example and Example 1 is that component A in the raw materials used in this comparative example comes from Preparation Example 24.

[0122] Performance Testing A public opinion survey method was used to select 10 female volunteers aged 20-50 years old. The skin-fitting liquid foundations prepared in Examples 1 to 16 and Comparative Examples 1 to 9 were used to evaluate their adherence and makeup lasting power, with 5 points representing very satisfactory, 4 points representing satisfactory, 3 points representing average, 2 points representing unsatisfactory, and 1 point representing very unsatisfactory. The scores were scored at 0 h, 1 h, 2 h, 4 h, and 8 h, and the average score was taken. The results are as follows.

[0123] Table 4 Test data of skin-friendly foundation liquids prepared in Examples 1 to 16 and Comparative Examples 1 to 9 It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make some simple deductions or substitutions without departing from the concept of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A skin-friendly liquid foundation, characterized in that: Includes the following components: 80 parts water, 4-8 parts of modified A component, 3-4 parts of modified B component, Dispersant 0.1-0.5 parts, 5-10 parts of hydrogenated lecithin, 6-8 parts of moisturizer, 1-3 parts of emollient, 4-6 parts of cyclopentasiloxane, 6-9 parts of trimethylsiloxysilicate, 2-3 parts of ethanol, 1.5-3 parts of additives; The component A comprises flaky titanium dioxide, spherical titanium dioxide and spherical silicon dioxide, and the components in the component A are fully grafted with a first coupling agent and then grafted with lauroyl lysine to obtain a modified component A, wherein the first coupling agent comprises a silane coupling agent and a titanate coupling agent; The B component includes spherical titanium dioxide, spherical silicon dioxide and inorganic color powder. The components in the B component are fully grafted with a second coupling agent and then grafted with isopropyl titanium triisostearate to obtain a modified B component. The number of amino groups in the molecule of the second coupling agent is ≥2.

2. The skin-friendly liquid foundation according to claim 1, characterized in that: In the component A, the particle size of the flaky titanium dioxide is 5-50 μm.

3. The skin-friendly liquid foundation according to claim 2, characterized in that: In the component A, the particle sizes of the spherical titanium dioxide and the spherical silicon dioxide are both 100-150 μm; And / or, in the component B, the particle size of the spherical titanium dioxide and the spherical silicon dioxide are both 200-300 μm.

4. The skin-friendly liquid foundation according to claim 1, characterized in that: In the component A, the mass ratio of the sum of the mass of the flaky titanium dioxide and the spherical titanium dioxide to the mass ratio of the spherical silicon dioxide is a1; in the first coupling agent, the mass ratio of the titanate coupling agent to the silane coupling agent is a2, and a2≥a1; And / or, the second coupling agent is selected from one or more of N-β-aminoethyl-γ-aminopropyltrimethoxysilane, N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane, N-β-aminoethyl-γ-aminopropyltriethoxysilane, N-β-aminoethyl-γ-aminopropylmethyldiethoxysilane, and γ-aminoethylaminopropyltrimethoxysilane.

5. The skin-friendly liquid foundation according to claim 1, characterized in that: The mass ratio of the component A to the lauroyl lysine is (3-5):

100.

6. The skin-friendly liquid foundation according to claim 1, characterized in that: The mass ratio of the B component to the isopropyl titanium triisostearate is (4-6):

100.

7. The skin-friendly liquid foundation according to claim 1, characterized in that: The dispersant is selected from one or both of polydimethylsiloxane and sodium lauryl sulfate; And / or, the moisturizing agent is selected from one or two of propylene glycol and ceramide; And / or, the emollient is selected from one or both of jojoba oil and caprylic / capric triglyceride.

8. The skin-friendly liquid foundation according to claim 1, characterized in that: The mass of the flaky titanium dioxide in the component A accounts for 0.5%-1% of the component A.

9. A method for preparing the skin-friendly liquid foundation according to any one of claims 1 to 8, characterized in that: The steps include: Treatment of component A: Component A is mixed with water, the first coupling agent is added, and then the reaction is carried out at 25-30 kHz for 1.5-2 hours, followed by filtration. The filtered solid is then washed and mixed with water again, lauroyl lysine is added, and the reaction is carried out at 60-75°C for 8-10 hours, followed by filtration. The filtered solid is then dried to obtain the modified component A. Treating component B: mixing component B with water, adding isopropyl titanium triisostearate and a second coupling agent, and adjusting the pH to 7, then treating at 25-30 kHz and 60-75° C. for 1.5-2 hours, and then drying to obtain a modified component B; Mixing preparation: Mix water, modified component A, modified component B, dispersant, hydrogenated lecithin, moisturizer, emollient, cyclopentasiloxane and trimethylsiloxysilicate, then emulsify at 65-75°C. After the temperature drops to 30-35°C, add ethanol and additives, stir evenly, and you will get the skin-friendly liquid foundation.

10. The preparation method according to claim 9, characterized in that: In the mixing preparation step, the stirring speed of the emulsification is ≥3000 rpm / min; And / or, in the mixing preparation step, the stirring speed after adding ethanol and the auxiliary agent is 1000-1500 rpm / min.

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