Highly stable, strong-sunscreen sunscreen compositions, methods of making, use and products

Abstract

The application provides a sunscreen composition with high stability and strong sunscreen effect, a preparation method, application and product, and particularly relates to the cosmetic technical field.The sunscreen composition is prepared from the following raw material components according to weight parts: 4-8 parts of a powder treatment agent composition, 5-10 parts of titanium dioxide and 10-15 parts of zinc oxide; the powder treatment agent composition is composed of cocoyl octanoate / cocoyl decanoate, polyglyceryl-6 polyhydroxystearate, polyglyceryl-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglyceryl-3 polydimethylsiloxyethyl dimethicone and lauryl polyglyceryl-3 polydimethylsiloxyethyl dimethicone at a weight ratio of 14-20:2-8:1-5:1-5:5-9:5-9. In the sunscreen composition, the titanium dioxide and the zinc oxide are fully dispersed, the components interact with each other, the stability is high, and the sunscreen effect is strong.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to a sunscreen composition with high stability and strong sun protection, its preparation method, application, and products. Background Technology

[0002] In cosmetic systems, surfactants and emulsifiers typically form a stable structure and are key components determining product stability. Surfactants, with their amphiphilic properties (hydrophilic and hydrophobic groups in their molecular structure), reduce the interfacial tension between the oil and water phases. Simultaneously, they prevent the dispersed phase from agglomerating through charge repulsion or steric hindrance. The choice of surfactant type directly affects system compatibility. Emulsifiers, acting as the "skeleton" of emulsions or creams, achieve long-term stability by constructing a high-strength interfacial film. Polyol fatty acid ester surfactants are an important branch of nonionic surfactants, characterized by high stability and good compatibility. The hydrophilic groups of polyol fatty acid esters can bind to water, while the lipophilic groups can bind to oils. This component is unaffected by acidic or alkaline environments (pH 3-10) during cosmetic use and is not prone to reacting with metal ions, maintaining long-term stability in emulsions, creams, and other formulations, preventing product separation, deterioration, and instability.

[0003] Currently, polyol fatty acid esters generally need to be used in combination with other surfactants. For example, Chinese invention patent CN118843448A discloses a cosmetic W / O emulsion composition comprising: (a) at least two polyglycerol-type surfactants; (b) a solvent comprising at least one polar oil and at least one non-polar oil; and (c) water, comprising no more than 40% by mass of the composition; wherein the at least two polyglycerol-type surfactants comprise at least two of polyglycerol-6 polyricinoleate, polyglycerol-3 diisostearate, and polyglycerol-6-polyhydroxystearate. The emulsion composition may also include a thickener component, at least one pigment, or an ultraviolet filter.

[0004] Chinese invention patent CN118356360A discloses an oil-in-water type foundation cosmetic, comprising at least the following components: (A) a mixed alkane, selected from C8-C15 straight-chain alkanes and / or iso-chain alkanes, wherein the viscosity of the mixed alkane is 0.5 mPa·s-10 mPa·s; (B) a mixed emulsifier, comprising at least two polyglycerol emulsifiers, wherein the HLB value of the mixed emulsifier is 3-8; and (C) an inorganic colorant modified with polyglycerol emulsifiers; wherein the polyglycerol emulsifiers are selected from polyglycerol... At least one of the following: 2 isostearate, polyglycerol-2 diisostearate, polyglycerol-2 tetraisostearate, polyglycerol-3 diisostearate, polyglycerol-3 polyricinoleate, polyglycerol-4 isostearate, polyglycerol-6 polyricinoleate, olive oil polyglycerol-6 ester, or polyglycerol-6 pentaoleate.

[0005] Analysis reveals that existing technologies merely list emulsifiers or surfactants in the field as examples, without explicitly specifying which specific ingredients, when combined, synergistically enhance stability and improve sun protection performance. The core technological bottleneck of current sunscreen products lies in the inability to simultaneously improve both stability and sun protection performance. This dilemma stems from a fundamental contradiction between ingredient characteristics and system compatibility. Regarding the interaction between sunscreen agents and emulsion dispersion systems, physical sunscreens (such as zinc oxide and titanium dioxide), while possessing broad-spectrum protection, are prone to gravitational sedimentation in emulsions due to their high density. Furthermore, the surface charge of physical sunscreens easily interacts with unsuitable emulsion dispersion systems, leading to severe stratification. While using high-concentration polymeric emulsifiers can extend the product's stability period if the focus is on improving stability, the dense interfacial film formed by the emulsifier hinders the spread and film formation of the sunscreen on the skin surface, resulting in reduced sun protection effectiveness. Additionally, insufficient compatibility between components can easily lead to micro-phase separation, further reducing stability.

[0006] Therefore, further research is needed on emulsifiers and surfactants to obtain a sunscreen composition with good compatibility and film-forming properties, high stability, and synergistic effects of each component in resisting ultraviolet rays. This composition can then be applied to the preparation of cosmetics to obtain products with uniform particle size, stability, and significantly improved sun protection performance. Summary of the Invention

[0007] This invention addresses the problems existing in the prior art by providing a sunscreen composition with high stability and strong sun protection, as well as its preparation method, application, and product. The invention employs a powder treatment agent composition to grind titanium dioxide and zinc oxide into powder. Under the action of coconut oil alcohol-octanoate / caprylate, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane, titanium dioxide and zinc oxide are fully dispersed, and the stability of the sunscreen composition is improved. This significantly enhances the sunscreen composition's sun protection efficacy across the entire UV spectrum.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: First, the present invention provides a sunscreen composition with high stability and strong sun protection, which is made of the following raw material components by weight: 4-8 parts of powder treatment agent composition, 5-10 parts of titanium dioxide and 10-15 parts of zinc oxide; The powder treatment agent composition comprises coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane in a weight ratio of 14-20:2-8:1-5:1-5:5-9:5-9.

[0009] Preferably, in the sunscreen composition, the powder treatment composition comprises coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane in a weight ratio of 15-19:3-7:2-4:2-4:6-8:6-8.

[0010] More preferably, in the sunscreen composition, the powder treatment composition comprises coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane in a weight ratio of 16:5:3:3:7:6.

[0011] Preferably, the sunscreen composition is made from the following raw material components in parts by weight: 5-7 parts powder treatment agent composition, 6-8 parts titanium dioxide and 12-14 parts zinc oxide.

[0012] More preferably, the sunscreen composition is made from the following raw material components in parts by weight: 6 parts powder treatment agent composition, 7 parts titanium dioxide and 13 parts zinc oxide.

[0013] More preferably, the titanium dioxide is titanium dioxide treated with triethoxyoctylsilane; and the zinc oxide is zinc oxide treated with triethoxyoctylsilane.

[0014] Furthermore, the present invention provides a method for preparing the above-mentioned sunscreen composition, comprising the steps of: mixing the components in the prescribed amounts evenly to obtain the sunscreen composition.

[0015] Preferably, the mixing is uniform, specifically by stirring at a speed of 8-20 rpm for 5-10 minutes, repeated 2-3 times.

[0016] More preferably, the mixing is uniform, specifically by stirring at 10 rpm for 6 minutes, repeated twice.

[0017] Furthermore, the present invention provides the application of the above-mentioned sunscreen composition in the preparation of cosmetics with high stability and high sun protection performance.

[0018] Finally, the present invention provides a cosmetic with high stability and high sun protection performance, comprising the above-mentioned sun protection composition.

[0019] Preferably, the cosmetic also includes components: commonly used excipients in the cosmetic field, including but not limited to moisturizers, emulsifiers, thickeners, antioxidants, whitening agents, and skin conditioning agents.

[0020] Preferably, the cosmetics are not limited to sunscreens, sunscreen lotions, sunscreen sprays, sunscreen sticks, sunscreen gels, sunscreen jelly, and sunscreen base makeup.

[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. In the sunscreen composition of the present invention, titanium dioxide and zinc oxide are ground into powder using a powder treatment agent composition. Under the action of coconut oil alcohol-caprylate / caprylate, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane, titanium dioxide and zinc oxide can be fully dispersed, and the stability of the sunscreen composition is improved. The resulting sunscreen composition has excellent sun protection efficacy across the entire spectrum, with a sun protection value of SPF 50 and above.

[0022] 2. The sunscreen composition prepared by this invention has uniform particles. Under specific component and ratio conditions, the powder treatment agent composition improves the film-forming performance and stability of the sunscreen composition, efficiently filling the gaps between film particles, resulting in high sun protection and high stability. Titanium dioxide and zinc oxide, under specific ratio conditions with the powder treatment agent composition, exhibit mutual charge attraction, reducing agglomeration. The synergistic effect of PEG-30-dipolyhydroxystearate, polyglycerol-3-polydimethylsiloxane, and lauryl polyglycerol-3-polydimethylsiloxane further improves the dispersibility of titanium dioxide and zinc oxide. Under specific weight ratio conditions, the components are dispersed more evenly and finely, while being less prone to aggregation and sedimentation, thus improving stability and uniformity.

[0023] 3. The sunscreen composition of the present invention is stirred and mixed at a speed of 8-20 rpm, which further improves the stability and uniformity of the sunscreen composition while protecting the particle size of titanium dioxide and zinc oxide from being damaged. Attached Figure Description

[0024] Figure 1These are biological microscope images of the sunscreen composition prepared in Example 1 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0025] Figure 2 These are biological microscope images of the sunscreen composition prepared in Example 2 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0026] Figure 3 These are biological microscope images of the sunscreen composition prepared in Example 3 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0027] Figure 4 These are biological microscope images of the sunscreen composition prepared in Example 4 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0028] Figure 5 These are biological microscope images of the sunscreen composition prepared in Example 5 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0029] Figure 6 These are biological microscope images of the sunscreen composition prepared in Example 6 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0030] Figure 7 These are biological microscope images of the sunscreen composition prepared in Example 7 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0031] Figure 8 The images show biological microscopic test results of the sunscreen composition prepared in Comparative Example 1 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0032] Figure 9 The images show biological microscopic test results of the sunscreen composition prepared in Comparative Example 2 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0033] Figure 10 These are biological microscope images of the sunscreen composition prepared in Comparative Example 3 after being placed at room temperature, high temperature of 40℃, and alternating temperature conditions of -10℃ to 45℃ for 30 days.

[0034] Figure 11These are biological microscope images of the sunscreen composition prepared in Comparative Example 4 after being placed at room temperature, high temperature of 40℃, and alternating temperature conditions of -10℃ to 45℃ for 30 days.

[0035] Figure 12 These are biological microscope images of the sunscreen composition prepared in Comparative Example 5 after being placed at room temperature, high temperature of 40℃, and alternating temperature conditions of -10℃ to 45℃ for 30 days.

[0036] Figure 13 These are biological microscope images of the sunscreen composition prepared in Comparative Example 6 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0037] Figure 14 The images show biological microscopic test results of the sunscreen composition prepared in Comparative Example 7 after being placed at room temperature, high temperature of 40°C, and alternating temperature conditions of -10°C to 45°C for 30 days.

[0038] Figure 15 These are biological microscope images of the sunscreen composition prepared in Comparative Example 8 after being placed at room temperature, high temperature of 40℃, and alternating temperature conditions of -10℃ to 45℃ for 30 days. Detailed Implementation

[0039] The following non-limiting embodiments are intended to enable those skilled in the art to gain a more comprehensive understanding of the present invention, but do not limit the invention in any way. The following content is merely an exemplary description of the scope of protection of the present invention, and those skilled in the art can make various changes and modifications to the present invention based on the disclosed content, which should also fall within the scope of protection of the present invention.

[0040] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in the invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0041] The present invention will be further described below by way of specific embodiments. Unless otherwise specified, all chemical reagents used in the embodiments of the present invention are obtained through conventional commercial means.

[0042] In the specific implementation of this invention, the sources of the main raw materials used are shown in Table 1. The sources of these raw materials are merely exemplary, and products from different manufacturers do not have a significant impact on the effect.

[0043] Table 1

[0044] Example 1: A sunscreen composition with high stability and strong sun protection comprises, by weight, 6 parts of powder treatment agent composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0045] The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane; the mass ratio of the above components is 16:5:3:3:7:6.

[0046] The sunscreen composition is prepared by stirring the powder treatment agent composition, titanium dioxide treated with triethoxyoctylsilane, and zinc oxide treated with triethoxyoctylsilane at a speed of 10 rpm for 6 minutes, and repeating the stirring twice to obtain the sunscreen composition.

[0047] Example 2: A sunscreen composition with high stability and strong sun protection comprises, by weight, 6 parts of powder treatment agent composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0048] The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane; the mass ratio of the above components is 15:2:1:2:5:5.

[0049] The sunscreen composition is prepared by stirring the powder treatment agent composition, titanium dioxide treated with triethoxyoctylsilane, and zinc oxide treated with triethoxyoctylsilane at a speed of 8 rpm for 10 min, and repeating the stirring twice to obtain the sunscreen composition.

[0050] Example 3: A sunscreen composition with high stability and strong sun protection comprises, by weight, 6 parts of powder treatment agent composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0051] The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane; the mass ratio of the above components is 19:7:5:5:8:6.

[0052] The sunscreen composition is prepared by stirring the powder treatment agent composition, titanium dioxide treated with triethoxyoctylsilane, and zinc oxide treated with triethoxyoctylsilane at a speed of 20 rpm for 5 min, and repeating the stirring three times to obtain the sunscreen composition.

[0053] Example 4: A sunscreen composition with high stability and strong sun protection comprises, by weight, 5 parts of powder treatment agent composition, 6 parts of titanium dioxide treated with triethoxyoctylsilane and 12 parts of zinc oxide treated with triethoxyoctylsilane.

[0054] The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane; the mass ratio of the above components is 14:2:1:3:5:7.

[0055] The preparation method of the sunscreen composition is the same as in Example 1.

[0056] Example 5: A sunscreen composition with high stability and strong sun protection comprises, by weight, 7 parts of powder treatment agent composition, 8 parts of titanium dioxide treated with triethoxyoctylsilane and 14 parts of zinc oxide treated with triethoxyoctylsilane.

[0057] The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane; the mass ratio of the above components is 20:8:5:3:9:5.

[0058] The preparation method of the sunscreen composition is the same as in Example 1.

[0059] Example 6: A sunscreen composition with high stability and strong sun protection comprises, by weight, 4 parts of powder treatment agent composition, 5 parts of titanium dioxide treated with triethoxyoctylsilane and 10 parts of zinc oxide treated with triethoxyoctylsilane.

[0060] Everything else is the same as in Example 1.

[0061] Example 7: A sunscreen composition with high stability and strong sun protection comprises, by weight, 8 parts of powder treatment agent composition, 10 parts of titanium dioxide treated with triethoxyoctylsilane and 15 parts of zinc oxide treated with triethoxyoctylsilane.

[0062] Everything else is the same as in Example 1.

[0063] Comparative Example 1: Unlike Example 1, PEG-30-dipolyhydroxystearate was replaced with polyglycerol-2-dipolyhydroxystearate.

[0064] A sunscreen composition comprising, by weight, 6 parts of a powder treatment composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane, and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0065] The powder treatment agent composition comprises: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, polyglycerol-2 dihydroxystearate, polyglycerol-3 polydimethylsiloxyethyl polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxyethyl polydimethylsiloxane; the mass ratio of the above components is 16:5:3:3:7:6.

[0066] The preparation method of the sunscreen composition is the same as in Example 1.

[0067] Comparative Example 2: Unlike Example 1, the powder treatment composition does not contain the components: polyglycerol-3 polydimethylsiloxane and lauryl polyglycerol-3 polydimethylsiloxane.

[0068] A sunscreen composition comprising, by weight, 6 parts of a powder treatment composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane, and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0069] The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, and PEG-30-dihydroxystearate, with a mass ratio of 16:8:3:3.

[0070] The preparation method of the sunscreen composition is the same as in Example 1.

[0071] Comparative Example 3: Unlike Example 1, the powder treatment composition does not contain the component: polyglycerol-3-dimethylsilyl hydroxyethyl polydimethylsiloxane.

[0072] A sunscreen composition comprising, by weight, 6 parts of a powder treatment composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane, and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0073] The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, and lauryl polyglycerol-3 polydimethylsiloxane; the mass ratio of the above components is 16:5:3:3:13.

[0074] The preparation method of the sunscreen composition is the same as in Example 1.

[0075] Comparative Example 4: Unlike Example 1, the powder treatment composition does not contain the component: lauryl polyglycerol-3 polydimethylsiloxane.

[0076] A sunscreen composition comprising, by weight, 6 parts of a powder treatment composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane, and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0077] The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, and polyglycerol-3 polydimethylsilyl ethyl polydimethylsiloxane; the mass ratio of the above components is 16:5:3:3:13.

[0078] The preparation method of the sunscreen composition is the same as in Example 1.

[0079] Comparative Example 5: Unlike Example 1, the powder treatment agent composition has different components, specifically: The powder treatment agent composition contains the following components: coconut oil alcohol-caprylate / caprylate, cetyl caprylate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, poloxamer 105 benzoate, and PEG-30 glyceryl cocoate; the mass ratio of the above components is 16:5:3:3:7:6.

[0080] A sunscreen composition comprising, by weight, 6 parts of a powder treatment composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane, and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0081] The preparation method of the sunscreen composition is the same as in Example 1.

[0082] Everything else is the same as in Example 1.

[0083] Comparative Example 6: Unlike Example 1, the powder treatment composition includes the following components: squalene, PEG-8 octanoate / decanoate, cocoyl alcohol polyether-3, and polyglycerol-10 dioleate.

[0084] A sunscreen composition comprising, by weight, 6 parts of a powder treatment composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane, and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0085] The powder treatment agent composition comprises: coconut oil alcohol-caprylate / caprylate, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, polyglycerol-3 polydimethylsiloxane, lauryl polyglycerol-3 polydimethylsiloxane, squalene, PEG-8 caprylate / caprylate, coconut oil alcohol polyether-3, and polyglycerol-10 dioleate; the mass ratio of the above components is 16:5:3:3:7:1.2:1.2:1.2:1.2:1.2:1.2.

[0086] The preparation method of the sunscreen composition is the same as in Example 1.

[0087] Comparative Example 7: Unlike Example 1, the weight ratio of each component in the powder treatment agent composition is different.

[0088] The powder treatment agent composition comprises: coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dihydroxystearate, polyglycerol-3 polydimethylsiloxane-ethyl polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane-ethyl polydimethylsiloxane; the mass ratio of the above components is 5:17:7:7:3:1.

[0089] A sunscreen composition comprising, by weight, 6 parts of a powder treatment composition, 7 parts of titanium dioxide treated with triethoxyoctylsilane, and 13 parts of zinc oxide treated with triethoxyoctylsilane.

[0090] Everything else is the same as in Example 1.

[0091] Comparative Example 8: Unlike Example 1, the weight ratio of the components in the sunscreen composition is different.

[0092] A sunscreen composition comprising, by weight, 6 parts of a powder treatment composition, 15 parts of titanium dioxide treated with triethoxyoctylsilane, and 5 parts of zinc oxide treated with triethoxyoctylsilane.

[0093] Everything else is the same as in Example 1.

[0094] Effect Test 1 Stability: The sunscreen compositions prepared in each embodiment and comparative example were placed under ambient temperature, high temperature of 40℃, and alternating temperature conditions of -10℃ to 45℃ for 30 days. The high and low temperature cycle test was carried out in a programmable constant temperature and humidity test chamber with a heating time rate of 3℃ / min and a cooling time rate of 1℃ / min. The temperature fluctuation of the equipment was ≤0.5℃, the temperature deviation was ±2℃, and the temperature uniformity was ≤2℃.

[0095] After 30 days of testing, the dispersion of the sunscreen composition in the continuous phase was observed using a DFS-102 biological microscope. The observation indicators were: the dispersed phase always had a uniform particle size and was not affected by temperature and gravity, and it did not aggregate or demulsify. The solid / powder dispersed phase was dispersed into a uniform particle size and was evenly distributed in the continuous phase.

[0096] Test results are shown Figures 1-15 The figures are stability test graphs for the sunscreen compositions of Examples 1-7 and Comparative Examples 1-8, respectively, which show the dispersion of the dispersed phase in the continuous phase.

[0097] from Figures 1-7 As can be seen from Examples 1-7, the sunscreen composition of the present invention has good stability under normal temperature, high temperature and low / high temperature change conditions. The dispersed phase particles in the micrographs of the samples are uniform in size and have clear boundaries, without aggregation or demulsification. The micrographs of the examples all show clear fractional droplet boundaries and uniform particle size.

[0098] And from Figures 8-15 The comparative results (Comparative Examples 1-8) show that the stability of sunscreen compositions with altered component ratios or ingredients decreases. For example, Comparative Example 2 showed different particle sizes and partial aggregation in its high and low temperature cycle stability. Comparative Example 4 showed uneven particle size, aggregation, and partial turbidity and demulsification in its high and low temperature cycle stability. Comparative Examples 5-8 showed large-scale uneven particle size, droplet aggregation, and demulsification in their high temperature and cycle stability, which proves that the stability of the sunscreen compositions prepared in the comparative examples deteriorated.

[0099] Based on the above test results, it can be seen that the present invention, under the action of coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane, can fully disperse titanium dioxide and zinc oxide, and improve the stability of the sunscreen composition, so that the prepared sunscreen composition has better stability.

[0100] Effect Test 2: Sunscreen Performance Test Following the method in US20180313694A1, SPF (Sun Protection Factor) and PFA (Protection Factor of UVA) were tested using the Solasure™ Sunscreen Testing Platform.

[0101] The testing process is as follows: 1. Using a fully automated coating platform and coater, the sunscreen composition is repeatedly coated on quartz plates of precise thickness to obtain multiple sunscreen sample coatings with good reproducibility and precise film thickness (5 micrometers).

[0102] 2. Measure the absorption curve of the sunscreen composition using a UV-Vis spectrophotometer and record the absorption values ​​between 290 nm and 400 nm.

[0103] 3. The sunscreen composition was simulated by sunlight exposure using an HPA skin-beautifying lamp with a lamp source energy of 6.7 milliwatts per square centimeter. The irradiation dose was equivalent to the solar radiation of 31 degrees north latitude during one hour at noon in summer.

[0104] 4. After irradiation, measure the absorption curve of the sunscreen composition coating using a UV-Vis spectrophotometer. Substitute the measured values ​​into the ISO 24443 calculation formula to calculate the SPF and PFA values ​​of the sunscreen composition. Perform the experiment in triplicate.

[0105] The SPF (dimensionless) and PFA (dimensionless) values ​​of the sunscreen compositions of each embodiment and comparative example are shown in Table 2.

[0106] Table 2

[0107] In Table 2, each comparative example group is compared with Example 1. # P<0.05, ## P<0.01 indicates a significant difference.

[0108] According to the above test results, in the sunscreen composition of the present invention, titanium dioxide and zinc oxide are ground into powder using a powder treatment agent composition. Under the action of coconut oil alcohol-caprylate / caprylate, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane, titanium dioxide and zinc oxide can be fully dispersed, so that the obtained sunscreen composition has good sun protection effect across the entire spectrum and the sun protection value reaches SPF 50 and above.

[0109] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A sunscreen composition with high stability and strong sun protection, characterized in that, It is made from the following raw material components in parts by weight: 4-8 parts powder treatment agent composition, 5-10 parts titanium dioxide and 10-15 parts zinc oxide; The powder treatment agent composition comprises coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane in a weight ratio of 14-20:2-8:1-5:1-5:5-9:5-9.

2. The sunscreen composition according to claim 1, characterized in that, The powder treatment agent composition comprises coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane in a weight ratio of 15-19:3-7:2-4:2-4:6-8:6-8.

3. The sunscreen composition according to claim 2, characterized in that, The powder treatment agent composition comprises, by weight ratio 16:5:3:3:7:6, coconut oil alcohol-caprylate / capric acid ester, polyglycerol-6 polyhydroxystearate, polyglycerol-6 polyricinoleate, PEG-30-dipolyhydroxystearate, polyglycerol-3 polydimethylsiloxane, and lauryl polyglycerol-3 polydimethylsiloxane.

4. The sunscreen composition according to any one of claims 1-3, characterized in that, It is made from the following raw material components in parts by weight: 5-7 parts powder treatment agent composition, 6-8 parts titanium dioxide and 12-14 parts zinc oxide.

5. The sunscreen composition according to claim 4, characterized in that, It is made from the following raw material components in parts by weight: 6 parts powder treatment agent composition, 7 parts titanium dioxide and 13 parts zinc oxide.

6. The sunscreen composition according to claim 1, characterized in that, The titanium dioxide is titanium dioxide treated with triethoxyoctylsilane; the zinc oxide is zinc oxide treated with triethoxyoctylsilane.

7. A method for preparing the sunscreen composition according to any one of claims 1-6, characterized in that, The process includes the following steps: mixing the formulated components evenly to obtain a sunscreen composition.

8. The preparation method according to claim 7, characterized in that, The mixing process is as follows: stir at a speed of 8-20 rpm for 5-10 minutes, and repeat 2-3 times.

9. The sunscreen composition according to any one of claims 1-6 is used in the preparation of cosmetics with high stability and high sun protection performance.

10. A cosmetic product with high stability and high sun protection performance, comprising the component: the sun protection composition according to any one of claims 1-6.

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