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CN-122005318-A - Dual-phase powder slurry combination and application thereof, oil-in-water sun protection system and preparation method thereof

CN122005318ACN 122005318 ACN122005318 ACN 122005318ACN-122005318-A

Abstract

The invention relates to a biphase powder slurry combination and application thereof, an oil-in-water sun-screening system and a preparation method thereof, wherein the biphase powder slurry combination comprises 4-6.5 parts by weight of hydrophilic nanometer titanium dioxide powder slurry and 1.5-4 parts by weight of lipophilic micrometer titanium dioxide powder slurry, nanometer titanium dioxide in the hydrophilic nanometer titanium dioxide powder is subjected to hydrophilization surface treatment of hydrated silica and lecithin, the average primary particle size is 10-100 nm, micrometer titanium dioxide in the lipophilic micrometer titanium dioxide powder slurry is subjected to hydrophobization surface treatment of triethoxy octyl silane, the average primary particle size is 1-10 mu m, and the solid mass ratio of the nanometer titanium dioxide to the micrometer titanium dioxide is 1:0.5-1:1. The oil-in-water sun cream with high SPF value, high water resistance, natural optical brightness, refreshing feel and long-term stability is obtained through the synergistic effect of the hydrophilic nanoscale titanium dioxide and the lipophilic microscale titanium dioxide in the biphasic powder slurry combination.

Inventors

  • LI LULU
  • ZHOU KANGFU
  • WANG FEIFEI
  • MA XIAO
  • GUO ZHENYU

Assignees

  • 云南特色植物提取实验室有限公司
  • 云南贝泰妮生物科技集团股份有限公司

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. A dual phase slip combination comprising: 4-6.5 parts by weight of hydrophilic nano titanium dioxide slurry and 1.5-4 Parts by weight of lipophilic micron titanium dioxide slurry; the nano titanium dioxide in the hydrophilic nano titanium dioxide slurry is subjected to hydrophilization surface treatment of hydrated silica and lecithin, and the average primary particle size is 10-100 nm; the micron-sized titanium dioxide in the lipophilic micron-sized titanium dioxide slurry is subjected to hydrophobic surface treatment of triethoxy octyl silane, and the average primary particle size is 1-10 mu m; the solid mass ratio of the nano-scale titanium dioxide to the micro-scale titanium dioxide is 1:0.5-1:1.
  2. 2. The dual phase slip combination of claim 1, wherein the hydrophilic nano titanium dioxide slip comprises, in mass percent: 40-45% of nano-scale titanium dioxide, 30-40% of butanediol, 15-25% of hydrated silica, 1-1.5% of lecithin and 1.5-2.5% of polysorbate-80.
  3. 3. The dual phase slip combination of claim 1, wherein the lipophilic micron titanium dioxide slip comprises, in mass percent: 60-70% of the micron-sized titanium dioxide, 1-1.5% of triethoxy octyl silane and 30-35% of dibutyl adipate.
  4. 4. Use of a dual phase slip combination according to any one of claims 1 to 3 in an oil-in-water sunscreen system.
  5. 5. The use according to claim 4, wherein the oil-in-water sunscreen system comprises an oil-in-water emulsifier, a thickener, an aqueous phase and an oil phase; the hydrophilic nano titanium dioxide slurry in the two-phase slurry combination is dispersed in the water phase, and the lipophilic micron titanium dioxide slurry is dispersed in the oil phase.
  6. 6. The use according to claim 5, wherein the aqueous phase comprises a humectant and an antioxidant and the oil phase comprises a film former and a filler powder.
  7. 7. The use according to claim 6, wherein the humectant comprises one or more of glycerin, butylene glycol or pentylene glycol; The antioxidant comprises p-hydroxyacetophenone; the film forming agent comprises hydrogenated polycyclopentadiene; the filling powder comprises one or more of silicon dioxide, talcum powder or mica.
  8. 8. Use according to claim 5, characterized in that the thickener comprises an ammonium acryloyldimethyl taurate/VP copolymer, xanthan gum, sela ammonium chloride hectorite; The oil-in-water emulsifier comprises one or more of sucrose monostearate, cetyl palmitate, polysorbate-60 or potassium cetyl phosphate.
  9. 9. An oil-in-water sunscreen system comprising a combination of two-phase slip as claimed in any one of claims 1 to 3, characterized in that it comprises, per 100 parts by weight: 5-20 parts of a chemical sun-screening agent; 1-6 parts of an oil-in-water emulsifier; 0.5-2 parts of film forming agent; 5-20 parts of an emollient; 4-6.5 parts of hydrophilic nano titanium dioxide slurry; 1.5-4 parts of lipophilic micron titanium dioxide powder slurry; 0.01-0.02 parts of a colorant; 0.2-0.6 parts of a thickener; 5-10 parts of humectant; 1-2 parts of filling powder; 0.3-0.5 parts of an antioxidant; The balance of water; The solid mass ratio of the nano-scale titanium dioxide to the micro-scale titanium dioxide is 1:0.5-1:1.
  10. 10. A method of preparing an oil-in-water sunscreen system according to claim 9, comprising the steps of: S1, mixing an oil-in-water emulsifier, an emollient, a chemical sun-screening agent and a film forming agent to obtain a phase A, heating to 75-80 ℃, and stirring until the phase A is completely dissolved; s2, uniformly mixing the lipophilic micron titanium dioxide slurry and the colorant to obtain a phase B, adding the phase A, and uniformly stirring at 75-80 ℃ until the phase A is completely dispersed to obtain an oil phase; s3, mixing water, a humectant, a thickener, an antioxidant and an oil-in-water emulsifier to obtain a C phase, stirring and heating to 75-80 ℃ until the thickener is completely swelled to form a water phase; s4, slowly adding the oil phase into the water phase, and homogenizing and emulsifying at 75-80 ℃ to form a uniform emulsifying system; And S5, cooling the emulsification system to below 50 ℃, adding hydrophilic nano titanium dioxide slurry, and stirring until the system is uniform and stable, thus obtaining the oil-in-water sun-screening system.

Description

Dual-phase powder slurry combination and application thereof, oil-in-water sun protection system and preparation method thereof Technical Field The present disclosure relates to the technical field of cosmetic preparations, and in particular to a dual-phase slip combination and application thereof, an oil-in-water sun protection system and a preparation method thereof. Background With the increasing maturity of consumer skin care concepts, market demands for sun protection products have been upgraded from basic uv protection to pursue "multiple efficacy in one" composite protection. An ideal sun-proof product, in particular to sun-proof isolation emulsion with a pre-makeup priming function, meets the harsh requirements of four dimensions simultaneously, namely (1) high-power and broad-spectrum ultraviolet protection capability (high SPF/PA value), (2) excellent and durable water-resistant and sweat-resistant performance to cope with daily sweating or wading scenes, (3) instant, natural and non-fake skin color brightening and modification effects, realizes a fake-plain skin makeup feel, and (4) light, fresh, breathable and non-sticky skin feel, and ensures all-weather comfort experience. The main stream sun protection product formulations on the market are classified into water-in-oil (W/O) type and oil-in-water (O/W) type. Although the W/O system has an inherent advantage in water resistance, the W/O system has the inherent disadvantages of oily and thick skin feel, poor air permeability, easy acne formation, difficult makeup removal and the like, and the W/O system runs counter to the demand of the current market for 'fresh and breathable', so that the application of the W/O system is greatly limited. Thus, the O/W system, which is more refreshing in skin feel and lighter in texture, is a consumer preference. However, the current O/W system cannot achieve the above high performance index, and is specifically expressed by the following three inherent contradictions existing in the O/W system: First, there is a conflict between a fresh skin feel and long-lasting water repellency. The O/W system takes water as a continuous external phase, water-soluble components are easy to run off when the O/W system meets water (sweat), and the sun-proof film is easy to damage. To increase water repellency, it is often necessary to increase the amount of film former, but this necessarily results in increased film feel, sticky skin feel, and is contrary to the refreshing nature of the O/W system. Second, the contradiction between high efficacy ingredient loading and system stability. In order to realize high SPF value, high concentration organic (chemical) sun screening agent and inorganic (physical) sun screening powder are compounded in the formula. The high-polarity oil phase component and the high-content solid powder (particularly the inorganic powder which is easy to agglomerate) are extremely difficult to stably coexist in an O/W system, the collapse of an emulsifying system, layering, oil precipitation or particle sedimentation are extremely easy to occur, and the upper functional limit and the shelf life of the product are severely restricted. Third, the contradiction between the immediate modification force and the natural make-up feel. In order to achieve the effects of brightening skin color and modifying flaws, powder such as titanium dioxide is usually added into a formula. However, if simply added, nano-sized powder is easy to cause 'deathly pale' or 'grey white', and micron-sized powder is easy to cause 'false face' feel and thick cosmetic effect, so that natural and three-dimensional optical modification effect is difficult to realize. Meanwhile, unstable powder dispersion is easy to cause the problem of rubbing mud during smearing. The prior art generally adjusts sun protection and finishing effects by adjusting the proportion of materials in the sun protection system. For example, CN110772439a discloses a sunscreen composition and a method for preparing the same, wherein the sunscreen composition comprises hydrophilic group-coated titanium dioxide, lipophilic group-coated titanium dioxide, hydrophilic group-coated zinc oxide and lipophilic group-coated zinc oxide, the mass ratio of the hydrophilic group-coated titanium dioxide, lipophilic group-coated titanium dioxide, hydrophilic group-coated zinc oxide and lipophilic group-coated zinc oxide is 8-16:8-16:8-16. According to the scheme, the sun-proof effect is improved and the skin irritation is reduced through reasonable proportion of the modified titanium dioxide and the zinc oxide. However, the water resistance and skin feel of the sunscreen composition are not sufficiently verified, the stability of the system is easily affected by environmental factors (such as temperature and pH value), and the separation of components or the reduction of the use effect may be caused during long-term storage or use. Disclosure of Invention Based on this, it is an obj