A long-lasting, glossy, plumping lip formula that doesn't transfer color to cups.

Abstract

This invention provides a composition for long-lasting, glossy, plump lips that does not transfer to cups, belonging to the field of cosmetic technology. The composition comprises: diphenyl polydimethylsiloxane, VP / hexadecene copolymer, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentamethoxysiloxane, trimethylsiloxysilicate, and polyglycerol-3 diisostearate. The hydrogenated (styrene / methylstyrene / indene) copolymer forms a rigid framework, diphenyl polydimethylsiloxane provides high refractive gloss and enhances flexibility, and the VP / hexadecene copolymer stabilizes the system and promotes film formation, achieving a balance of non-transferability, long-lasting gloss, and comfortable feel. When this composition is applied to lip cosmetics and combined with functional components such as UV absorbers, repairing lipids, pearlescent pigments, and skin feel modifiers, the resulting product exhibits excellent performance in terms of stability, comfort, non-transferability, and long-lasting gloss.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, specifically to a composition for long-lasting, glossy, plump lips that does not stain cups. Background Technology

[0002] Lip cosmetics, especially liquid or gel products such as lip gloss and lip tint, are an indispensable part of modern women's daily makeup routine. Their core purpose is to bring a full, moisturized, and glossy visual effect to the lips, thereby enhancing the overall radiance and attractiveness of the face. However, traditional glossy lip products have always faced an irreconcilable contradiction in satisfying the two key performance aspects of gloss and longevity, accompanied by a series of inherent defects that affect the user experience.

[0003] First, traditional glossy lip glosses often contain large amounts of oils and esters to achieve a high shine. However, these ingredients are prone to migration, resulting in poor staying power and easy transfer. While these ingredients can initially create a mirror-like shine, their sticky nature causes them to quickly migrate and come off with lip movements, talking, drinking, or eating. Second, color transfer is particularly bothersome. The oils and colorants (especially oil-soluble dyes) in the product fail to adhere firmly to the lip skin and easily transfer to the rims of cups, tableware, clothing, and even teeth, causing embarrassing situations. This not only affects the integrity of the makeup but also reduces the product's professionalism and high-end feel.

[0004] While some non-transferable matte liquid lipsticks have appeared on the market, their finish is mostly a matte texture, failing to satisfy consumers' desire for a dewy and plump look. Furthermore, comfort and finish are often difficult to balance. High concentrations of film-forming agents can improve staying power, but often lead to tightness, dryness, and a lack of breathability on the lips, potentially exacerbating lip lines with long-term use. Conversely, in pursuit of a comfortable feel, excessive moisturizing oils can weaken the product's staying power, creating a vicious cycle. In addition, many products experience a significant decrease in shine after drying and forming a film, failing to achieve long-lasting shine.

[0005] Therefore, there is an urgent need in the field for a lip composition that combines long-lasting shine, non-staining properties, superior comfort, and a realistic plumping effect, maintaining its glossy, mirror-like finish for an extended period while possessing excellent adhesion and a lightweight feel, thus meeting the urgent needs of modern consumers for high-quality, high-efficiency beauty products. Summary of the Invention

[0006] The purpose of this invention is to provide a composition for long-lasting glossy plumping lips that does not transfer color to cups. The composition provided by this invention is used in lip cosmetics and has excellent physical stability, skin comfort, non-transferability, and long-lasting gloss.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0008] This invention provides a composition for long-lasting, glossy, plump lips that does not stain cups, comprising the following raw materials in parts by weight: 18-26 parts of diphenyl polydimethylsiloxane, 8-15 parts of VP / hexadecene copolymer, 6-10 parts of hydrogenated (styrene / methylstyrene / indene) copolymer, 20-28 parts of cyclopentapolydimethylsiloxane, 5-8 parts of trimethylsiloxysilicate, and 2-4 parts of polyglycerol-3 diisostearate.

[0009] The present invention also provides an application of the above composition in lip cosmetics.

[0010] Preferably, the lip cosmetic is a liquid lip gloss, lip stain, or lipstick.

[0011] The present invention also provides a lip cosmetic containing the above composition, comprising: 55-90 parts of the above composition, 1-3 parts of bis-ethylhexyloxyphenol methoxyphenyl triazine, 2-3 parts of phytosterol / octyldodecyl lauroyl glutamate, 4-7 parts of pearlescent pigment, 1-3 parts of spherical silica powder, 1-2 parts of polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, 0.3-0.8 parts of menthol lactate, 2.5-4.5 parts of colorant, 0.5-1 part of panthenol, 5-10 parts of skin feel modifier, and 0.05-0.3 parts of preservative.

[0012] Preferably, the method for preparing the pearlescent pigment includes: mixing mica with water to obtain a suspension; mixing TiOSO4 solution with the suspension and reacting the mixture, followed by filtration, washing, drying, and calcination to obtain the pearlescent pigment.

[0013] More preferably, the reaction is carried out at a temperature of 70-80°C, a pH of 2-2.5, and a time of 2-4 hours.

[0014] More preferably, the mass fraction of the suspension is 8%-12%, the concentration of the TiOSO4 solution is 120-180 g / L, and the volume ratio of the suspension to the TiOSO4 solution is (3-3.5):1.

[0015] Preferably, the colorant is one or more of red iron oxide, yellow iron oxide, and pigment red 57:1.

[0016] Preferably, the skin feel modifier is one or more of squalane, sunflower seed wax, jojoba seed oil, and synthetic candelilla wax.

[0017] The present invention also provides a method for preparing the above-mentioned lip cosmetic, comprising: mixing and heating diphenyl polydimethylsiloxane, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentamethoxysiloxane, trimethylsiloxysilicate and polyglycerol-3 diisostearate with phytosterol / octyldodecyl lauroyl glutamate to obtain an oil phase; sequentially adding VP / hexadecene copolymer, pearlescent pigment, spherical silica powder, bis-ethylhexyloxyphenol methoxyphenyl triazine, panthenol, menthol lactate, colorant, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, skin feel modifier and preservative under stirring, cooling and filling to obtain the lip cosmetic.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention addresses the problems of traditional lip cosmetics, such as difficulty in achieving both shine and longevity, easy transfer to cups, and poor skin feel. It provides a composition for long-lasting, glossy, plumping lips that does not transfer to cups, and related lip cosmetics. The composition includes: diphenyl polydimethylsiloxane, VP / hexadecene copolymer, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentamethoxysiloxane, trimethylsiloxysilicate, and polyglycerol-3 diisostearate. The hydrogenated (styrene / methylstyrene / indene) copolymer provides a rigid framework, diphenyl polydimethylsiloxane imparts high refractive index gloss and plasticizes, VP / hexadecene copolymer stabilizes the system and promotes film formation, and the combination of volatile solvents for rapid film setting, network enhancers to strengthen the film structure, and emulsifiers to ensure dispersion stability results in a long-lasting glossy film on the lips, preventing lipstick, lip gloss, and lipstick color from transferring to cups, while also achieving a natural, non-drying feel, and providing moisturizing, breathable, hydrating, and nourishing effects.

[0020] This invention utilizes a composition in lip cosmetics, further compounded with bis-ethylhexyloxyphenol methoxyphenyl triazine, phytosterol / octyldodecyl lauroyl glutamate, pearlescent pigment, spherical silica powder, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, menthol lactate, colorant, panthenol, skin feel modifier, and preservative. Experimental results show that the lip cosmetics of this invention exhibit excellent physical stability, skin comfort, non-stickiness, and long-lasting shine. Detailed Implementation

[0021] This invention provides a composition for long-lasting, glossy, plump lips that does not stain cups, comprising the following raw materials in parts by weight: 18-26 parts of diphenyl polydimethylsiloxane, 8-15 parts of VP / hexadecene copolymer, 6-10 parts of hydrogenated (styrene / methylstyrene / indene) copolymer, 20-28 parts of cyclopentapolydimethylsiloxane, 5-8 parts of trimethylsiloxysilicate, and 2-4 parts of polyglycerol-3 diisostearate.

[0022] This invention demonstrates a synergistic effect between diphenyl polydimethylsiloxane, VP / hexadecene copolymer, and hydrogenated (styrene / methylstyrene / indene) copolymer. The hydrogenated (styrene / methylstyrene / indene) copolymer acts as a rigid framework, constructing a high-strength main film and imparting excellent anti-transfer properties (non-stickiness). Diphenyl polydimethylsiloxane, with its high refractive index, provides a long-lasting mirror-like gloss and, as an internal plasticizer, effectively improves the flexibility of the hydrogenated copolymer hard film, preventing brittleness and thus enhancing the integrity and durability of the makeup effect. The VP / hexadecene copolymer acts as a thickener and film-forming aid, not only stabilizing the entire oil-phase system and preventing component separation but also bridging and enhancing the compatibility between the two components during film formation, promoting the formation of a dense, uniform, and strongly adhesive composite film. These three components work synergistically to achieve a balance between gloss, durability, and comfort.

[0023] The cyclopentadimethylsiloxane plays a crucial role in the composition of this invention as a volatile carrier solvent. Firstly, it effectively dissolves film-forming resins such as hydrogenated (styrene / methylstyrene / indene) copolymers, forming a uniform, spreadable system. After application, the cyclopentadimethylsiloxane rapidly evaporates due to its low enthalpy of volatility. This process not only provides a refreshing feel but, more importantly, quickly reduces the viscosity of the system, causing the film-forming resin to instantly crosslink into a dense, continuous film. This rapid film-setting mechanism locks the colorant and the high-refractive-index diphenyldimethylsiloxane onto the lip, which is one of the core driving forces behind achieving non-stick and long-lasting gloss.

[0024] The trimethylsiloxane silicate plays a key role as a network film-forming enhancer in the composition of this invention. After the solvent evaporates, its three-dimensional siloxane skeleton structure can intertwine with the linear molecular chains of the hydrogenated (styrene / methylstyrene / indene) copolymer to form an interpenetrating network structure. This process significantly enhances the mechanical strength, adhesion, and abrasion resistance of the composite film, as if adding a skeleton support to the film. It can effectively prevent the film from cracking or peeling due to daily activities (such as talking and eating), thereby locking the colorant and gloss components more firmly to the lip, which is crucial for achieving a long-lasting non-stick effect and maintaining gloss.

[0025] The polyglycerol-3 diisostearate plays a crucial role as a key emulsifying stabilizer and dispersant in the composition of this invention. It effectively reduces the interfacial tension between pigments (such as iron oxide and mica flakes) and the organosilicon / hydrocarbon oil phase. Through steric hindrance, it ensures that the solid powder is uniformly and stably dispersed in the system, preventing sedimentation and aggregation, and ensuring uniform product color. At the same time, it enhances the compatibility between components with different polarities (such as film-forming resin, silicone oil, and skin feel modifier), promoting the formation of a structurally uniform and stable composite oil-based system. This is essential for the continuity of the final film formation, the durability of gloss, and storage stability.

[0026] In this invention, the hydrogenated copolymer forms a rigid film skeleton, providing core non-stick properties; diphenyl polydimethylsiloxane, as a high-refractive-index brightener and internal plasticizer, imparts a lasting mirror-like gloss and enhances film flexibility, preventing cracking; VP / hexadecene copolymer acts as a stabilizer and auxiliary film-forming agent, ensuring system homogeneity and promoting the formation of a continuous, dense composite film. Together, these three components achieve a balance between gloss, durability, and film integrity. Cyclopentadimethylsiloxane provides a refreshing initial feel and promotes rapid film formation; polyglycerol-3 diisostearate ensures uniform pigment dispersion and long-term system stability. The balanced formulation of the components in this invention achieves a harmonious skin feel after film formation, avoiding tightness and discomfort, and unifying long-lasting makeup effects with a comfortable experience.

[0027] The present invention also provides an application of the above composition in a lip cosmetic, wherein the lip cosmetic is a liquid lip gloss, lip stain or lipstick.

[0028] The present invention also provides a lip cosmetic containing the above composition, comprising: 55-90 parts of the above composition, 1-3 parts of bis-ethylhexyloxyphenol methoxyphenyl triazine, 2-3 parts of phytosterol / octyldodecyl lauroyl glutamate, 4-7 parts of pearlescent pigment, 1-3 parts of spherical silica powder, 1-2 parts of polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, 0.3-0.8 parts of menthol lactate, 2.5-4.5 parts of colorant, 0.5-1 part of panthenol, 5-10 parts of skin feel modifier, and 0.05-0.3 parts of preservative.

[0029] The preferred method for preparing the pearlescent pigment of the present invention includes: mixing mica with water to obtain a suspension; mixing and reacting a TiOSO4 solution with the suspension, followed by sequential filtration, washing, drying, and calcination to obtain the pearlescent pigment. The reaction temperature is preferably 70-80℃, more preferably 75℃; the pH value is preferably 2-2.5, more preferably 2.3; the reaction time is preferably 2-4h, more preferably 3h; the mass fraction of the suspension is preferably 8%-12%, more preferably 10%; the concentration of the TiOSO4 solution is preferably 120-180g / L, more preferably 150g / L; and the volume ratio of the suspension to the TiOSO4 solution is preferably (3-3.5):1, more preferably 3.2:1.

[0030] This invention enables the uniform deposition of titanium dioxide onto the surface of mica sheets, forming a substrate-coating microstructure. The mica sheets themselves provide a base gloss and smoothness, while the uniformly encapsulated high-refractive-index TiO2 crystals significantly enhance the interference and reflection intensity of light. This directly determines that the final pigment can impart a bright and soft pearlescent sheen to lip makeup products, a unique angle-dependent color variation effect (i.e., subtle color changes when viewed from different angles), and significantly improve coverage and color saturation. Compared to simple physical mixing, the pigments prepared using the method of this invention have purer colors, finer gloss, and more stable performance, which is key to achieving a high-end makeup effect.

[0031] The bis-ethylhexyloxyphenol methoxyphenyl triazine is used as a highly efficient oil-soluble broad-spectrum ultraviolet absorber in the lip cosmetics of this invention. It can not only prevent ultraviolet rays from causing lip color darkening, but also protect the film-forming polymer and colorant from photodegradation, thereby maintaining the gloss and color durability.

[0032] The phytosterol / octyldodecyl lauroyl glutamate ester described herein serves as a highly effective, naturally derived lipid repair ingredient in the lip cosmetics of this invention. Its main function is to strengthen the skin barrier and provide deep hydration. It can effectively replenish intercellular lipids in the lips, reduce transepidermal water loss, provide long-lasting soothing for dryness, and improve lip roughness. At the same time, it enhances the penetration and stability of active ingredients in the formula, continuously replenishes lipids after film formation, repairs the lip barrier, and combats the dryness caused by film-forming agents, thereby fundamentally improving the product's care efficacy.

[0033] The polydimethylsiloxane / vinyl polydimethylsiloxane crosslinked polymer is used as a highly efficient silicone elastomer in the lip cosmetics of this invention. Its main function is to provide a unique matte velvet texture and excellent oil absorption and control performance. At the same time, its excellent hydrophobicity and elasticity can enhance the longevity of makeup, prevent color from shifting due to oil secretion, improve the stability of the formula, and give the product a smooth and lightweight application experience.

[0034] The spherical silica powder, used in the lip cosmetics of this invention, serves as a multifunctional powder modifier. Its main functions are to optimize the product's feel, enhance makeup effects, and improve stability. Its smooth spherical structure and low specific surface area effectively reduce interparticle friction, giving the formula a smooth and lightweight application feel and eliminating greasiness. In terms of makeup effects, it can produce a soft-focus effect through light scattering, smoothing lip lines. Furthermore, its hydrophobic properties help absorb oil, improving makeup longevity and anti-transfer capabilities. Simultaneously, as an anti-caking agent, it prevents pigment aggregation, ensuring a uniform and stable product texture.

[0035] Menthol lactate, as a functional cooling agent and soothing ingredient in the lip cosmetics of this invention, mainly enhances the immediate user experience of the product and provides a slight visual effect of plumping the lips. By activating the skin's temperature receptors, it produces a cooling sensation, causing slight local capillary constriction and subsequent hyperemia, making the lips appear fuller from a sensory perspective. In addition, this refreshing skin feel can significantly enhance the pleasant experience of the product.

[0036] The colorant is preferably one or more of red iron oxide, yellow iron oxide, and pigment red 57:1.

[0037] Panthenol, as a highly effective skin conditioning agent and moisturizing factor in the lip cosmetics of this invention, mainly provides deep repair, moisturizing and soothing effects, promotes the repair and regeneration of epithelial cells, effectively soothes lip discomfort caused by dryness and irritation, enhances the hydration of the lip stratum corneum, reduces transepidermal water loss, and provides lasting improvement for dryness and peeling. In addition, it can also enhance the skin barrier function, provide internal care for the lips, and improve the care level of the product.

[0038] The skin feel modifier is preferably one or more of squalane, sunflower seed wax, jojoba seed oil, and synthetic candelilla wax. The preservative is preferably one or more of phenoxyethanol, 1,2-hexanediol, and sodium benzoate.

[0039] The lip cosmetic provided by this invention achieves outstanding comprehensive efficacy through the action of its various components. Its core lies in the formation of a strong yet flexible composite film, giving the product excellent durability and effectively resisting color transfer caused by drinking and minor friction, achieving a non-transferable effect. Simultaneously, the combination of high-refractive-index components and pearlescent pigments provides a bright and long-lasting mirror-like shine, and through optical reflection, makes the lips appear fuller. Furthermore, it ensures a superior comfort experience, quickly setting makeup without causing tightness, and is supplemented with cooling, moisturizing, and repairing ingredients to soothe lip discomfort, achieving a unity of long-lasting makeup, vibrant shine, and comfortable skin feel.

[0040] The present invention also provides a method for preparing the above-mentioned lip cosmetic, comprising: mixing and heating diphenyl polydimethylsiloxane, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentamethoxysiloxane, trimethylsiloxysilicate and polyglycerol-3 diisostearate with phytosterol / octyldodecyl lauroyl glutamate to obtain an oil phase; sequentially adding VP / hexadecene copolymer, pearlescent pigment, spherical silica powder, bis-ethylhexyloxyphenol methoxyphenyl triazine, panthenol, menthol lactate, colorant, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, skin feel modifier and preservative under stirring, cooling and filling to obtain the lip cosmetic.

[0041] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] Unless otherwise specified, the following embodiments are all conventional methods.

[0043] Unless otherwise specified, all materials and reagents used in the following examples are commercially available.

[0044] Diphenyl polydimethylsiloxane was purchased from Shanghai Jinmei Industrial Co., Ltd., item number J108; VP / hexadecene copolymer was purchased from Wuhan Huaxiang Kejie Biotechnology Co., Ltd., item number 32440-50-9; hydrogenated (styrene / methylstyrene / indene) copolymer was purchased from Aoke New Material Technology (Shanghai) Co., Ltd.; cyclopentapolydimethylsiloxane was purchased from Shandong Yousuo Chemical Technology Co., Ltd., item number U31103118; polyglycerol-3 diisostearate was purchased from Yichang Mingya New Material Technology Co., Ltd., item number MY986; polydimethylsiloxane / vinyl polydimethylsiloxane crosslinked polymer was purchased from Guangzhou Shanghe Chemical Technology Co., Ltd., item number 8002AO; spherical silica powder was purchased from Guangzhou Yatis Biotechnology Co., Ltd., model L7; mica was purchased from Lingshou County Huashuo Mineral Products Processing Plant, item number TRYM2023.

[0045] Example 1

[0046] A long-lasting, glossy, plumping lip formula that won't transfer to cups.

[0047] Weigh the following components by weight: 24 parts diphenyl polydimethylsiloxane, 14 parts VP / hexadecene copolymer, 9 parts hydrogenated (styrene / methylstyrene / indene) copolymer, 20 parts cyclopentapolydimethylsiloxane, 7 parts trimethylsiloxysilicate, and 3 parts polyglycerol-3 diisostearate.

[0048] Example 2

[0049] A long-lasting, glossy, plumping lip formula that won't transfer to cups.

[0050] Weigh the following components by weight: 23 parts diphenyl polydimethylsiloxane, 10 parts VP / hexadecene copolymer, 8 parts hydrogenated (styrene / methylstyrene / indene) copolymer, 25 parts cyclopentapolydimethylsiloxane, 6 parts trimethylsiloxysilicate, and 4 parts polyglycerol-3 diisostearate.

[0051] Example 3

[0052] A long-lasting, glossy, plumping lip formula that won't transfer to cups.

[0053] Weigh the following components by weight: 22 parts diphenyl polydimethylsiloxane, 9 parts VP / hexadecene copolymer, 7 parts hydrogenated (styrene / methylstyrene / indene) copolymer, 26.7 parts cyclopentapolydimethylsiloxane, 6 parts trimethylsiloxysilicate, and 2 parts polyglycerol-3 diisostearate.

[0054] Example 4

[0055] Lip cosmetics

[0056] (1) Preparation of pearlescent pigments

[0057] S1. Hydrolysis sedimentation and maturation

[0058] Mica (substrate) was mixed with water to obtain a suspension with a mass fraction of 10%. The stirring was turned on and the speed was set to 200 r / min. 150 g / L TiOSO4 solution was added dropwise to the suspension and reacted at a temperature of 75℃ and a pH of 2.3 for 3 h.

[0059] S2. Post-processing

[0060] The reacted material was filtered, and the filter cake was washed four times with deionized water. The filter cake (as a new substrate) was then used to repeat step S1 twice, followed by filtration and washing to obtain a filter cake. The filter cake was dried at 110°C to a moisture content of 2wt% and then calcined at 850°C for 1.5 hours to obtain pearlescent pigment.

[0061] (2) Preparation of lip cosmetics

[0062] S1. Weighing

[0063] Accurately weigh the following components according to weight: 77 parts of the composition of Example 1, 2 parts of bis-ethylhexyloxyphenol methoxyphenyl triazine, 2 parts of phytosterol / octyldodecyl lauroyl glutamate, 6 parts of pearlescent pigment, 1 part of spherical silica powder, 2 parts of polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, 0.5 parts of menthol lactate, 3.5 parts of colorant (including 1.0 part of red iron oxide, 0.3 parts of yellow iron oxide, and 2.2 parts of pigment red 57:1), 0.5 parts of panthenol, 5 parts of skin feel modifier (including 3 parts of squalane and 2 parts of jojoba seed oil), and 0.2 parts of preservative (phenoxyethanol).

[0064] S2. Preparation

[0065] Diphenyl polydimethylsiloxane, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentapolydimethylsiloxane, trimethylsiloxysilicate, polyglycerol-3 diisostearate, and phytosterol / octyldodecyl lauroyl glutamate were added to an emulsifying tank, and low-speed stirring (30 rpm) was started. The temperature was raised to 80°C and stirred for 18 min to obtain the oil phase.

[0066] Maintain the oil phase temperature at 80℃, increase the stirring speed to 2000 rpm, and add VP / hexadecene copolymer, pearl pigment, spherical silica powder, bis-ethylhexyloxyphenol methoxyphenyl triazine, panthenol, and colorant in sequence, and stir for 40 min;

[0067] Adjust the speed to 50 rpm, cool to 43°C, and add menthol lactate, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, skin feel modifier and preservative in sequence. Stir for 25 minutes, degas under vacuum, and fill to obtain lip cosmetics.

[0068] Example 5

[0069] Lip cosmetics

[0070] (1) Preparation of pearlescent pigments

[0071] S1. Hydrolysis sedimentation and maturation

[0072] Mica (substrate) was mixed with water to obtain a suspension with a mass fraction of 8%. The stirring was turned on and the speed was set to 180 r / min. 120 g / L TiOSO4 solution was added dropwise to the suspension and reacted at 70℃ and pH 2 for 4 h.

[0073] S2. Post-processing

[0074] The reacted material was filtered, and the filter cake was washed three times with deionized water. The filter cake (as a new substrate) was then used to repeat step S1 once, filtered, and washed to obtain a filter cake. The filter cake was dried at 105°C to a moisture content of 3wt%, and then calcined at 800°C for 2 hours to obtain pearlescent pigment.

[0075] (2) Preparation of lip cosmetics

[0076] S1. Weighing

[0077] Accurately weigh the following components according to weight: 76 parts of the composition of Example 2, 1 part of bis-ethylhexyloxyphenol methoxyphenyl triazine, 2 parts of phytosterol / octyldodecyl lauroyl glutamate, 4 parts of pearlescent pigment, 3 parts of spherical silica powder, 2 parts of polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, 0.3 parts of menthol lactate, 4.5 parts of colorant (including 1.5 parts of red iron oxide, 0.5 parts of yellow iron oxide, and 2.5 parts of pigment red 57:1), 0.7 parts of panthenol, 6 parts of skin feel modifier (including 2.5 parts of squalane, 2.5 parts of jojoba seed oil, and 1 part of sunflower seed wax), and 0.2 parts of preservative (1,2-hexanediol).

[0078] S2. Preparation

[0079] Diphenyl polydimethylsiloxane, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentapolydimethylsiloxane, trimethylsiloxysilicate, polyglycerol-3 diisostearate, and phytosterol / octyldodecyl lauroyl glutamate were added to an emulsifying tank, and low-speed stirring (25 rpm) was started. The temperature was raised to 85°C, and stirring was carried out for 20 min to obtain the oil phase.

[0080] Maintain the oil phase temperature at 85℃, increase the stirring speed to 1500 rpm, and add VP / hexadecene copolymer, pearl pigment, spherical silica powder, bis-ethylhexyloxyphenol methoxyphenyl triazine, panthenol, and colorant in sequence, and stir for 50 min;

[0081] Adjust the rotation speed to 45 rpm, cool to 40°C, and add menthol lactate, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, skin feel modifier and phenoxyethanol in sequence. Stir for 30 minutes, degas under vacuum, and fill to obtain lip cosmetics.

[0082] Example 6

[0083] Lip cosmetics

[0084] (1) Preparation of pearlescent pigments

[0085] S1. Hydrolysis sedimentation and maturation

[0086] Mica (substrate) was mixed with water to obtain a suspension with a mass fraction of 12%. The stirring was turned on and the speed was set to 220 r / min. 180 g / L TiOSO4 solution was added dropwise to the suspension and reacted at 80℃ and pH 2.5 for 2 h.

[0087] S2. Post-processing

[0088] The reacted material was filtered, and the filter cake was washed 5 times with deionized water. The filter cake (as a new substrate) was then used to repeat step S1 3 times, followed by filtration and washing to obtain a filter cake. The filter cake was dried at 115°C to a moisture content of 3wt% and then calcined at 900°C for 1 hour to obtain pearlescent pigment.

[0089] (2) Preparation of lip cosmetics

[0090] S1. Weighing

[0091] Accurately weigh the following components according to weight: 72.7 parts of the composition of Example 3, 2 parts of bis-ethylhexyloxyphenol methoxyphenyl triazine, 3 parts of phytosterol / octyldodecyl lauroyl glutamate, 5 parts of pearlescent pigment, 1.5 parts of spherical silica powder, 1 part of polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, 0.8 parts of menthol lactate, 2.5 parts of colorant (including 0.8 parts of red iron oxide, 0.2 parts of yellow iron oxide, and 1.5 parts of pigment red 57:1), 1 part of panthenol, 10 parts of skin feel modifier (including 5 parts of squalane, 4 parts of jojoba seed oil, and 1 part of sunflower seed wax), and 0.2 parts of preservative (sodium benzoate).

[0092] S2. Preparation

[0093] Diphenyl polydimethylsiloxane, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentapolydimethylsiloxane, trimethylsiloxysilicate, polyglycerol-3 diisostearate, and phytosterol / octyldodecyl lauroyl glutamate were added to an emulsifying tank, and low-speed stirring (35 rpm) was started. The temperature was raised to 82°C, and the mixture was stirred for 15 min to obtain the oil phase.

[0094] Maintain the oil phase temperature at 82℃, increase the stirring speed to 2500 rpm, and add VP / hexadecene copolymer, pearl pigment, spherical silica powder, bis-ethylhexyloxyphenol methoxyphenyl triazine, panthenol, and colorant in sequence, and stir for 38 min;

[0095] Adjust the rotation speed to 55 rpm, cool to 45°C, and add menthol lactate, polydimethylsiloxane / vinyl polydimethylsiloxane crosspolymer, skin feel modifier and phenoxyethanol in sequence. Stir for 28 minutes, degas under vacuum, and fill to obtain lip cosmetics.

[0096] Comparative Example 1

[0097] The specific implementation method is the same as that in Example 4, except that diphenyl polydimethylsiloxane in the composition of Example 1 is omitted, the weight parts of VP / hexadecene copolymer are adjusted to 28.6 parts, and the weight parts of hydrogenated (styrene / methylstyrene / indene) copolymer are adjusted to 18.4 parts, while keeping the total weight of the composition consistent with that in Example 1.

[0098] Comparative Example 2

[0099] The specific implementation method is the same as that in Example 4, except that the VP / hexadecene copolymer in the composition of Example 1 is omitted, the weight parts of diphenyl polydimethylsiloxane are adjusted to 34.2 parts, and the weight parts of hydrogenated (styrene / methylstyrene / indene) copolymer are adjusted to 12.8 parts, while keeping the total weight of the composition consistent with that in Example 1.

[0100] Comparative Example 3

[0101] The specific implementation method is the same as that in Example 4, except that the hydrogenated (styrene / methylstyrene / indene) copolymer in the composition of Example 1 is omitted, the weight parts of diphenyl polydimethylsiloxane are adjusted to 29.7 parts, and the weight parts of VP / hexadecene copolymer are adjusted to 17.3 parts, while keeping the total weight of the composition consistent with that in Example 1.

[0102] Comparative Example 4

[0103] The specific implementation method is the same as that in Example 4, except that step (1) is omitted and 6 parts of pearlescent pigment are replaced with 2 parts of titanium dioxide and 4 parts of mica.

[0104] Comparative Example 5

[0105] The specific implementation method is the same as that in Example 4, except that the amount of trimethylsiloxysilicate in the composition of Example 1 is 9.5 parts and the amount of polyglycerol-3 diisostearate is 0.5 parts.

[0106] Comparative Example 6

[0107] The specific implementation method is the same as that in Example 4, except that the amount of trimethylsiloxysilicate in the composition of Example 1 is 1 part and the amount of polyglycerol-3 diisostearate is 9 parts.

[0108] Experimental Example 1

[0109] Physical stability test

[0110] Accelerated and heat and cold resistance tests were conducted on the lip cosmetics (samples) prepared in Examples 4-6 and Comparative Examples 1-6, respectively.

[0111] Accelerated stability test: Each sample was placed in a constant temperature and humidity chamber and placed for 1 month, 2 months and 3 months at a temperature of (40±2)°C and a relative humidity of (75±5)%.

[0112] Heat and cold resistance tests: Heat resistance: After being placed in a constant temperature chamber at (40±1)°C for 24 hours, the temperature was restored to room temperature for observation; Cold resistance: After being placed in a refrigerator at (-10±1)°C for 24 hours, the temperature was restored to room temperature for observation.

[0113] The physical stability of the initial samples and those after accelerated and heat and cold resistance tests was tested, and the specific results are shown in Table 1.

[0114] Test method: Observe whether there is layering, oil separation, precipitation, discoloration, or gas expansion; take the sample and place it in a centrifuge tube, centrifuge at 3000 rpm for 30 minutes, and observe whether there is layering or precipitation.

[0115] Table 1. Stability of lip cosmetics in each group

[0116]

[0117] Table 1 shows that the lip cosmetics of Examples 4-6 of this invention all maintained a uniform and delicate state, without layering, oil separation, precipitation, discoloration, or bloating. This indicates that the proportions of the components of this invention (such as diphenyl polydimethylsiloxane, VP / hexadecene copolymer, hydrogenated copolymer, etc.) are coordinated, and polyglycerol-3 diisostearate effectively plays an emulsifying and stabilizing role, ensuring the physical stability of the system under different environmental conditions, and meeting the basic requirements for long-term storage and use of lip cosmetics. Comparative Example 1 initially had slightly poor gloss and slightly uneven texture. After accelerated testing, soft sedimentation and slight oil separation appeared at the bottom. This is because diphenyl polydimethylsiloxane not only provides gloss but also acts as an internal plasticizer to improve the flexibility of the hard film of the hydrogenated copolymer. Its absence leads to a decrease in the compatibility and stability of the system, resulting in precipitation and oil separation. Comparative Example 2 initially showed slight pigment sedimentation, and after accelerated testing, severe separation of the oil, paste, and powder phases occurred. VP / hexadecene copolymer, as a thickener and auxiliary film-forming agent, can stabilize the oil phase system and enhance the compatibility of components. Its absence causes the system to lose its stable support, resulting in significant phase separation. Comparative Example 3 initially had a thin, oily consistency. After acceleration, the oil and powder completely separated. The hydrogenated (styrene / methylstyrene / indene) copolymer served as a rigid framework to construct the main film and also had a certain stabilizing effect on the system. Its absence resulted in a loose system structure, making it impossible to maintain a uniform state, leading to rapid oil and powder separation. Comparative Example 4 initially had a rough, granular texture. After acceleration, it precipitated and agglomerated. The directly mixed titanium dioxide and mica had poor dispersibility and were prone to aggregation and precipitation, affecting the stability of the system. Comparative Example 5 initially had an overly hard paste with particles. After acceleration, the paste shrank and sweated severely. An excess of trimethylsiloxysilicate made the system too rigid, while an insufficient amount of polyglycerol-3 diisostearate led to a decrease in emulsifying stability, resulting in oil separation and abnormal paste structure. Comparative Example 6 initially had an excessively thin and oily consistency. After acceleration, severe oil separation occurred. An insufficient amount of trimethylsiloxysilicate could not effectively enhance the film structure and system stability. Although an excess of polyglycerol-3 diisostearate had a certain emulsifying effect, the overall system was unbalanced, and oil separation still occurred.

[0118] Experimental Example 2

[0119] (1) Functional testing

[0120] The subjects (aged 22-35 years, with no lip inflammation, no history of allergies, and no long-term reliance on specific lip care products) were divided into 7 groups of 10 people each.

[0121] 1. Skin comfort rating

[0122] After cleaning their lips, the subjects in each group applied the lip cosmetic samples of Example 4 and Comparative Examples 1-6 evenly (0.1g / lip) and left them to stand for 5 minutes (simulating film formation time).

[0123] The skin comfort of each group of samples was scored according to the following scoring criteria, and the specific results are shown in Table 2.

[0124] Total score = tightness + hydration + smoothness + stickiness + plumping effect, out of 25 points.

[0125] Scoring criteria:

[0126] (1) Tightness: Assess the stretching and pulling sensation of the lip skin after film formation.

[0127] 5 points: After the film is formed and within 2 hours thereafter, there is no tightness or pulling sensation on the lips, the skin remains naturally relaxed, and there is no discomfort in daily activities such as speaking and smiling, and no signs of dryness or tightness.

[0128] 4 points: Within 1-2 hours after application and film formation, a very slight tightness may occur on the lips (only subjectively perceptible, with no visible signs of dryness), but daily activities are not affected;

[0129] 3 points: Within 30 minutes to 1 hour after application and film formation, the lips feel noticeably tight, accompanied by slight dryness (such as slightly deepened lip lines), and there is an occasional slight pulling sensation when speaking.

[0130] 2 points: Within 10-30 minutes after application and film formation, the lips feel very tight and dry (lip lines are significantly deepened and local skin wrinkles appear), and eating, smiling and other actions are slightly affected;

[0131] 1 point: Immediately after application and film formation, a severe tightness occurs, the skin on the lips quickly becomes dry and hard, and may even be accompanied by a stinging sensation, making it impossible to perform daily activities such as speaking and eating normally.

[0132] (2) Moisturizing effect: Evaluate the moisturizing and repairing effect on the lip skin.

[0133] 5 points: After application and for the next 2 hours, the lips remain moisturized and plump, the original dryness and peeling completely disappear, there is no roughness when touched with the fingertips, and the lip lines are significantly reduced.

[0134] 4 points: Within 1-2 hours after application, the lips remain moisturized, and the original dryness and peeling are significantly improved (only a very small amount of flakes remain). There is no obvious roughness to the touch, and the lip lines are slightly reduced.

[0135] 3 points: Within 30 minutes to 1 hour after application, the lips feel noticeably moisturized, and the original dryness and peeling are partially improved (there are still a few flakes). The lips may feel slightly rough to the touch, but there is no obvious change in lip lines.

[0136] 2 points: Within 10-30 minutes after application, the hydration of the lips disappears, dryness and peeling are not improved (or only slightly relieved), the roughness is obvious to the touch, and lip lines are not reduced;

[0137] 1 point: After application, there is no moisturizing effect, the dryness and peeling of the lips are aggravated, there is a noticeable grainy or stiff feeling when touched, and the lip lines are further deepened.

[0138] (3) Smoothness of application: Evaluate the smoothness of the material picking and application process.

[0139] 5 points: After collection, the sample is in a uniform fluid / paste state, without particles or layering; there is no resistance when applying it, and it can cover the lips evenly in one go (without patchiness or clumping), and there is no pulling or stretching of the lip skin during the application process;

[0140] 4 points: The sample is uniform in appearance (occasionally there are very fine particles, which do not affect the use). The resistance when applying is very slight, and it can evenly cover the lips in no more than 2 applications (without obvious patchiness or clumping) and without any pulling sensation.

[0141] 3 points: The sample is generally uniform (with a small number of fine particles), there is slight resistance when applying it, and it takes 2-3 applications to cover the lips (there are slight patches in some areas), and there is an occasional slight pulling sensation.

[0142] 2 points: The sample is uneven (with obvious particles or slight layering), there is obvious resistance when applying it, and it takes more than 3 times to cover the lips (obvious patchiness and clumping), and there is frequent pulling of the lip skin;

[0143] 1 point: The sample is clumped or severely separated (unable to be picked up normally), and there is great resistance when applying it. It easily pulls on the skin of the lips and cannot be evenly covered (large areas of patchy or clumped areas).

[0144] (4) Stickiness after film formation: Assess the freshness of the lips after film formation.

[0145] 5 points: After the film is formed (after standing for 5 minutes), there is no stickiness on the lips, and the lips feel dry to the touch. There is no sample adhesion when drinking water or touching tableware.

[0146] 4 points: After film formation, there is a very slight sticky feeling on the lips (only subjectively perceptible, not noticeably sticky to the touch), the stickiness completely disappears within 5 minutes, and there is no sample adhesion during daily contact;

[0147] 3 points: After film formation, there is a noticeable sticky feeling on the lips (sticky to the touch), which gradually disappears within 10-15 minutes. Occasionally, a slight sample may stick to the rim of the cup when drinking water.

[0148] 2 points: After film formation, the lips feel sticky (the fingers are obviously sticky with the sample after touching it), and the stickiness does not completely disappear within 30 minutes. The sample is easy to stick when drinking water or touching clothing.

[0149] 1 point: After film formation, the lips remain sticky for more than 30 minutes. The sample is easily transferred to fingers or other objects after touching, which seriously affects daily activities.

[0150] (5) Lip plumping effect (20%): Assess the visual and sensory fullness of the lips.

[0151] 5 points: Within 10 minutes of application, the lips show a noticeable natural plumpness (visually the lip peaks and lip pearl contours are more three-dimensional, and the horizontal width of the lips increases slightly), with no irritation, and the lip plumping effect lasts for more than 2 hours;

[0152] 4 points: Within 10-15 minutes after application, the lips appear naturally fuller (the outline is slightly more three-dimensional, but the width does not change significantly), with no irritation, and the lip plumping effect lasts for 1-2 hours;

[0153] 3 points: Within 15-20 minutes after application, the lips feel slightly fuller (only perceptible to the subjective sense, with no obvious visual change), with no irritation, and the lip plumping effect lasts for 30 minutes to 1 hour;

[0154] 2 points: More than 20 minutes after application, the lips only show a very slight feeling of fullness (not obvious in terms of sight or senses), or are accompanied by a very slight irritation (such as a brief numbness), and the lip plumping effect lasts for less than 30 minutes;

[0155] 1 point: No lip plumping effect after application, or accompanied by obvious irritation (such as persistent numbness or stinging), requiring adjustment of lip condition to relieve discomfort.

[0156] Table 2. Skin comfort rating of each group of lip cosmetics (points)

[0157]

[0158] Table 2 shows that Example 4 was significantly better than the comparative examples in terms of tightness, moisturization, smoothness, stickiness, lip plumping effect, and total score. Comparative Example 1 scored lower than Example 4. Diphenylpolydimethylsiloxane, as an internal plasticizer, improved the film's flexibility and reduced tightness. It also contributed to the system's moisturization; its absence led to increased tightness and decreased moisturization. Comparative Example 2 had lower scores in all indicators. The VP / hexadecene copolymer stabilized the system and promoted the formation of a continuous, dense film. Its absence resulted in a non-uniform system, increased application resistance (poor smoothness), and a poor film structure that affected the effectiveness of moisturizing ingredients (low moisturization). Comparative Example 3 had the lowest score among all groups. The film structure constructed from hydrogenated (styrene / methylstyrene / indene) copolymer has a significant impact on the skin feel. Its absence resulted in an unstable film structure, making it easy to pull on the lips during application (poor smoothness), and failing to effectively lock in moisturizing ingredients, leading to a strong tightness. Comparative Example 4, using a direct mixture of titanium dioxide and mica, resulted in a grainy texture in the pearlescent pigments, negatively impacting the overall skin feel and potentially interfering with the plumping effect of menthol lactate, leading to poor lip-plumping results. In Comparative Example 5, an excessive amount of trimethylsiloxysilicate made the film too stiff, increasing the tightness; insufficient polyglycerol-3 diisostearate resulted in uneven dispersion and increased stickiness. In Comparative Example 6, while an excessive amount of polyglycerol-3 diisostearate improved smoothness, the excessive oil content increased stickiness, negatively affecting the user experience.

[0159] (2) Non-stick cup test

[0160] After cleaning their lips, the subjects in each group applied the lip cosmetic samples of Example 4 and Comparative Examples 1-6 evenly (0.1g / lip), and let them stand for 5 minutes (simulating film formation time). They then gently pressed their lips with a standard white ceramic cup (3.5cm in diameter) (with uniform pressure of 50g for 2 seconds) and repeated the process 3 times.

[0161] The "staining grade rating method" was used for evaluation: Grade 5 (no staining), Grade 4 (very slight staining, only faint traces are visible), Grade 3 (slight staining, obvious traces), Grade 2 (moderate staining), and Grade 1 (severe staining). The average score of each group of samples was recorded and calculated. The specific results are shown in Table 3.

[0162] Table 3. Non-stickiness ratings for each group of lip cosmetics

[0163]

[0164] Table 3 shows that Example 4 exhibits excellent non-stick performance. The high-strength main film constructed from the hydrogenated copolymer provides excellent anti-transfer properties. The rapid volatilization of cyclopentamethoxysiloxane promotes cross-linking of the film-forming resin into a dense film, locking in colorants and gloss components. Trimethylsiloxysilicate enhances the film's mechanical strength and adhesion, collectively achieving excellent non-stick performance. Comparative Example 1, compared to Example 4, lacks diphenylpolydimethylsiloxane. Diphenylpolydimethylsiloxane improves the flexibility of the hydrogenated (styrene / methylstyrene / indene) copolymer hard film, preventing brittleness. Its absence leads to easy cracking of the film, easy transfer of colorants, and poorer non-stick performance. Comparative Example 2, compared to Example 4, lacks the VP / hexadecene copolymer. The VP / hexadecene copolymer bridges and enhances the compatibility of each component, promoting the formation of a dense and uniform film. Its absence results in a loose and non-uniform film structure, easy detachment and transfer of colorants, and a significant decrease in non-stick performance. Compared to Example 4, Comparative Example 3 lacks the hydrogenated (styrene / methylstyrene / indene) copolymer. This copolymer provides the rigid framework for non-stick properties; its absence results in insufficient film strength to resist transfer, allowing the colorant to easily adhere to the cup, thus failing to meet the non-stick requirements. In Comparative Example 4, the directly mixed pearlescent pigments (titanium dioxide and mica) are unevenly dispersed, potentially creating gaps on the film surface, leading to a small amount of colorant transfer and a slight decrease in non-stick properties. In Comparative Example 5, the excessive trimethylsiloxysilicate makes the film too hard and prone to cracking, while the insufficient polyglycerol-3 diisostearate results in uneven dispersion, affecting film integrity and facilitating colorant transfer. In Comparative Example 6, the insufficient trimethylsiloxysilicate fails to effectively enhance the film's mechanical strength and adhesion, reducing its anti-transfer ability and non-stick properties.

[0165] (3) Durable gloss test

[0166] Use a transparent quartz sheet (5cm×5cm) to simulate the lip base, apply the sample evenly (0.02mm thickness), and let stand for 5 minutes;

[0167] Initial gloss (T0): The gloss of the quartz disc was measured at the center and five points around it using a gloss meter, and the average value was taken.

[0168] Abrasion resistance test: Rub the sample surface back and forth 20 times with a standard chamois cloth (pressure 100g) (speed 1cm / s), and test the gloss after abrasion (T20).

[0169] Calculate the gloss retention rate (%) = (T20 / T0) × 100%, record and calculate the average score for each group of samples, and the specific results are shown in Table 4.

[0170] Table 4. Gloss retention rate (%) of each group of lip cosmetics

[0171]

[0172] Table 4 shows that Example 4 had the highest gloss retention rate, indicating its excellent long-lasting gloss performance. Diphenylpolydimethylsiloxane provided a durable mirror gloss due to its high refractive index; cyclopentamethoxysiloxane rapidly formed a film to lock in the gloss components; trimethylsiloxysilicate enhanced the film's abrasion resistance, reducing gloss loss caused by friction; and the pearlescent pigment prepared in this invention enhanced light reflection through uniformly deposited titanium dioxide, thereby improving and maintaining gloss. Comparative Example 1 lacked diphenylpolydimethylsiloxane compared to Comparative Example 4. Diphenylpolydimethylsiloxane is the main high-refractive-index brightener; its absence reduced the initial gloss and decreased the film's flexibility, making it prone to cracking, further exacerbating gloss loss and leading to a significant decrease in gloss retention rate. Comparative Example 2 lacked VP / hexadecene copolymer compared to Comparative Example 4. VP / hexadecene copolymer promotes the formation of a dense and uniform film; its absence resulted in a loose film structure, easy loss of gloss components, and poor abrasion resistance, leading to severe gloss loss after friction. Compared to Comparative Example 4, Comparative Example 3 lacks the hydrogenated (styrene / methylstyrene / indene) copolymer. The high-strength film constructed from this copolymer is fundamental to maintaining the stability of the gloss components. Its absence prevents the film from locking in the gloss components, resulting in a loose structure that is easily worn, leading to rapid gloss loss and extremely low retention. In Comparative Example 4, the directly mixed titanium dioxide and mica are unevenly dispersed, resulting in poor light reflection, low initial gloss, and easy detachment after friction, further reducing the gloss retention rate. In Comparative Example 5, the excessive trimethylsiloxysilicate makes the film too hard and prone to cracking, with gloss components being lost through the cracks; insufficient polyglycerol-3 diisostearate leads to uneven dispersion and uneven gloss distribution, resulting in significant gloss loss after friction. In Comparative Example 6, the insufficient trimethylsiloxysilicate fails to effectively enhance the film's abrasion resistance, making the film easily damaged after friction, leading to the loss of gloss components and a decreased gloss retention rate.

[0173] In summary, the lip cosmetic formulation provided by this invention exhibits a harmonious balance of proportions of diphenylpolydimethylsiloxane, VP / hexadecene copolymer, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentamethoxysiloxane, trimethylsiloxysilicate, and polyglycerol-3 diisostearate. Furthermore, the pearlescent pigment prepared using a specific method significantly enhances product performance, demonstrating excellent physical stability, skin comfort, non-stickiness, and long-lasting shine, thus validating the rationality of the lip cosmetic formulation of this invention. The data above show that the synergistic effect of diphenylpolydimethylsiloxane, VP / hexadecene copolymer, and hydrogenated copolymer is crucial for ensuring the product's physical stability, skin comfort, non-stickiness, and long-lasting shine; none can be omitted. Trimethylsiloxysilicate and polyglycerol-3 diisostearate must be used within appropriate ranges; the former enhances film strength and stability, while the latter ensures emulsification and dispersion. An imbalance in their proportions will lead to a decline in product performance. The pearlescent pigments prepared according to the method of the present invention can more effectively improve the physical stability, skin feel and gloss properties of the product compared with directly mixing titanium dioxide and mica.

[0174] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A lip cosmetic, characterized by, By weight consisting of: composition 55-90 parts, bis-ethylhexyloxyphenol methoxyphenyl triazine 1-3 parts, phytosteryl / octyldodecyl / lau- rate glutamate 2-3 parts, pearl pigment 4-7 parts, spherical silica powder 1-3 parts, dimethicone / vinyl dimethicone crosspolymer 1-2 parts, menthol lactate 0.3-0.8 parts, colorant 2.5-4.5 parts, panthenol 0.5-1 parts, skin feel modifier 5-10 parts and preservative 0.05-0.3 parts; the skin feel modifier is one or more of squalane, helianthus annuus (sunflower) seed wax, simmondsia chinensis (jojoba) seed oil, synthetic candelilla wax; Wherein, the composition is composed of the following raw materials by weight: diphenyl dimethicone 18-26 parts, VP / hexadecene copolymer 8-15 parts, hydrogenated (styrene / methylstyrene / indene) copolymer 6-10 parts, cyclopentasiloxane 20-28 parts, trimethyl siloxy silicate 5-8 parts and polyglyceryl-3 diisostearate 2-4 parts; The preparation method of the pearl pigment comprises the following steps: mixing mica with water to obtain a suspension; mixing TiOSO4 solution with the suspension to react, and then performing filtration, washing, drying and calcination in sequence to obtain the pearl pigment; wherein, the reaction temperature is 70-80℃, the pH value is 2-2.5, and the reaction time is 2-4h; the mass fraction of the suspension is 8%-12%, the concentration of the TiOSO4 solution is 120-180g / L, and the volume ratio of the suspension to the TiOSO4 solution is (3-3.5):

1.

2. The lip cosmetic according to claim 1, wherein The colorant is one or more of red iron oxide, yellow iron oxide and pigment red 57:

1.

3. A method for producing the lip cosmetic according to claim 1 or 2, characterized by, Comprise: Diphenyl dimethicone, hydrogenated (styrene / methylstyrene / indene) copolymer, cyclopentasiloxane, trimethyl siloxy silicate and polyglyceryl-3 diisostearate are mixed and heated to obtain an oil phase; VP / hexadecene copolymer, pearl pigment, spherical silica powder, bis-ethylhexyloxyphenol methoxyphenyl triazine, panthenol, menthol lactate, colorant, dimethicone / vinyl dimethicone crosspolymer, skin feel modifier and preservative are added in sequence under stirring, and then cooled and filled to obtain the lip cosmetic.

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