阅读说明：本技术 化妆料组合物、化妆品 (Cosmetic composition and cosmetic ) 是由 秦纪华 谢旭 刘晓慧 柯磊 亢荣敏 于 2020-12-14 设计创作，主要内容包括：本发明涉及化妆料组合物及化妆品。所述化妆料组合物包括第一改性二氧化钛和第二改性二氧化钛,所述第一改性二氧化钛包括亚微米级的二氧化钛以及依次包覆于所述亚微米级的二氧化钛表面的第一过渡层、第一疏水层和第二疏水层,所述第二改性二氧化钛包括纳米级的二氧化钛以及包覆于所述纳米级的二氧化钛表面的第三疏水层。所述化妆料组合物具有良好的防晒性能。本发明还提供了包括上述化妆料组合物的化妆品。(The present invention relates to a cosmetic composition and a cosmetic. The cosmetic composition comprises first modified titanium dioxide and second modified titanium dioxide, wherein the first modified titanium dioxide comprises submicron-sized titanium dioxide, and a first transition layer, a first hydrophobic layer and a second hydrophobic layer which are sequentially coated on the surface of the submicron-sized titanium dioxide, and the second modified titanium dioxide comprises nanoscale titanium dioxide and a third hydrophobic layer coated on the surface of the nanoscale titanium dioxide. The cosmetic composition has good sunscreen properties. The invention also provides a cosmetic comprising the cosmetic composition.)

1. The cosmetic composition is characterized by comprising first modified titanium dioxide and second modified titanium dioxide, wherein the first modified titanium dioxide comprises submicron-sized titanium dioxide, and a first transition layer, a first hydrophobic layer and a second hydrophobic layer which are sequentially coated on the surface of the submicron-sized titanium dioxide, and the second modified titanium dioxide comprises nanoscale titanium dioxide and a third hydrophobic layer coated on the surface of the nanoscale titanium dioxide.

2. The cosmetic composition according to claim 1, wherein the material of the first transition layer comprises aluminum hydroxide.

3. The cosmetic composition of claim 1, wherein the material of the first hydrophobic layer comprises stearoyl glutamate.

4. The cosmetic composition according to claim 3, wherein the stearoyl glutamate is selected from at least one of sodium stearoyl glutamate and disodium stearoyl glutamate.

5. The cosmetic composition of claim 1, wherein the material of the second hydrophobic layer comprises triethoxycaprylylsilane.

6. The cosmetic composition according to claim 1, wherein the first modified titanium dioxide has a particle size of 150nm to 400 nm.

7. The cosmetic composition according to claim 1, wherein a second transition layer is further included between the nanoscale titanium dioxide and the third hydrophobic layer, and the material of the second transition layer includes at least one of aluminum hydroxide and silicon oxide.

8. The cosmetic composition of claim 1, wherein the material of the third hydrophobic layer comprises at least one of triethoxyoctylsilane, polydimethylsiloxane.

9. The cosmetic composition according to claim 7, wherein the particle size of the second modified titanium dioxide is 45nm to 55 nm.

10. The cosmetic composition according to claim 1, wherein the mass ratio of the first modified titanium dioxide to the second modified titanium dioxide is 1:4 to 4: 1.

11. A cosmetic characterized by comprising the cosmetic composition according to any one of claims 1 to 10.

12. The cosmetic according to claim 11, wherein the cosmetic is selected from any one of a foundation liquid, a foundation cream, a face toilet, a concealer, a sunscreen, a face cream, and a makeup base.

Technical Field

The present invention relates to the field of cosmetics, and in particular, to a cosmetic composition and a cosmetic.

Background

It is well known that ultraviolet radiation is harmful to the skin. With the increase of people's awareness of sun protection, consumers increasingly prefer cosmetics with sun protection effect.

The nanometer titanium dioxide is a common sun-screening agent, and the cosmetic with the sun-screening effect can be prepared by adding the nanometer titanium dioxide into the formula of the cosmetic. However, the sunscreen effect of a single nanoscale titanium dioxide is quite limited. In order to obtain a high sunscreen effect, a large amount of nano-scale titanium dioxide is additionally added. However, the nano-scale titanium dioxide has poor dispersibility in the cosmetic formulation, and the addition of a large amount of nano-scale titanium dioxide not only increases the cost of the cosmetic, but also is not favorable for the stability of the cosmetic formulation.

Disclosure of Invention

Accordingly, there is a need for a cosmetic composition and a cosmetic having good sunscreen properties.

The cosmetic composition comprises first modified titanium dioxide and second modified titanium dioxide, wherein the first modified titanium dioxide comprises submicron-scale titanium dioxide, and a first transition layer, a first hydrophobic layer and a second hydrophobic layer which are sequentially coated on the surface of the submicron-scale titanium dioxide, and the second modified titanium dioxide comprises nanoscale titanium dioxide and a third hydrophobic layer coated on the surface of the nanoscale titanium dioxide.

In one embodiment, the material of the first transition layer comprises aluminum hydroxide.

In one embodiment, the material of the first hydrophobic layer comprises stearoyl glutamate.

In one embodiment, the stearoyl glutamate is selected from at least one of sodium stearoyl glutamate and disodium stearoyl glutamate.

In one embodiment, the material of the second hydrophobic layer comprises triethoxycaprylylsilane.

In one embodiment, the particle size of the first modified titanium dioxide is 150nm-400 nm.

In one embodiment, a second transition layer is further included between the nanoscale titanium dioxide and the third hydrophobic layer, and the material of the second transition layer includes at least one of aluminum hydroxide and silicon oxide.

In one embodiment, the material of the third hydrophobic layer comprises at least one of triethoxyoctylsilane and polydimethylsiloxane.

In one embodiment, the particle size of the second modified titanium dioxide is 45nm to 55 nm.

In one embodiment, the mass ratio of the first modified titanium dioxide to the second modified titanium dioxide is 1:4 to 4: 1.

The cosmetic composition of the present invention has the following advantages:

the cosmetic composition comprises submicron-sized first modified titanium dioxide and nanoscale second modified titanium dioxide. Wherein, the nanometer titanium dioxide can absorb, scatter and reflect ultraviolet rays and has diffraction effect on visible light; the submicron titanium dioxide can reflect visible light, scatter and reflect ultraviolet rays, and the scattering and reflection of the ultraviolet rays vary with the particle size. In the prior art, the single use of the nano-scale titanium dioxide or the submicron-scale titanium dioxide for preparing the sun-screening product inevitably has gaps which can not form a protective film, and ultraviolet rays can penetrate through the gaps and directly irradiate the skin, so that the sun-screening effect of the sun-screening product is not ideal. In the application, the two titanium dioxide with different particle sizes are combined, so that gaps among titanium dioxide particles can be reduced, and a uniform sunscreen film is formed, so that the cosmetic composition with better sunscreen performance is obtained.

In addition, the invention also carries out specific coating modification on the nano-scale titanium dioxide and the submicron-scale titanium dioxide respectively, so that the nano-scale titanium dioxide and the submicron-scale titanium dioxide can be better dispersed in a cosmetic formula, and the nano-scale titanium dioxide and the submicron-scale titanium dioxide are matched to form a uniform sunscreen film, thereby obtaining the cosmetic with stable property and excellent sunscreen effect.

A cosmetic comprising the above cosmetic composition.

In one embodiment, the cosmetic is selected from any one of a foundation, a skin makeup cream, a concealer, a sunscreen, a face cream, and a makeup base.

The cosmetic provided by the invention has less added sunscreen agent and better formula stability, and can form a uniform and complete ultraviolet shielding film on the surface of skin, thereby achieving better sunscreen effect.

Drawings

FIG. 1 is a topography of a first modified titanium dioxide under a scanning electron microscope;

fig. 2 is a topography of the second modified titanium dioxide under a scanning electron microscope.

Detailed Description

In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Herein, spf (sun Protection factors) refers to the solar photoprotection factor; UVA PF (Ultraviolet A Protection Factors) refers to the long-wave Ultraviolet Protection coefficient; PMMA (polymethyl methacrylate) refers to polymethyl methacrylate.

The present invention provides a cosmetic composition comprising a first modified titanium dioxide and a second modified titanium dioxide. The first modified titanium dioxide comprises submicron-grade titanium dioxide and a first transition layer, a first hydrophobic layer and a second hydrophobic layer which are sequentially coated on the surface of the submicron-grade titanium dioxide. The second modified titanium dioxide comprises nano-scale titanium dioxide and a third hydrophobic layer coated on the surface of the nano-scale titanium dioxide.

In one embodiment, the material of the first transition layer comprises aluminum hydroxide, the material of the first hydrophobic layer comprises disodium stearoyl glutamate, and the material of the second hydrophobic layer comprises triethoxycaprylylsilane.

Wherein the aluminum hydroxide of the first transition layer exists mainly in the form of AlO (OH), which can provide more active sites on the surface of the submicron-sized titanium dioxide, so that the first hydrophobic layer is easier to coat on the surface of the submicron-sized titanium dioxide. The first hydrophobic layer comprises hydrophobic groups, so that the coated submicron-sized titanium dioxide has hydrophobicity, is not easy to agglomerate and is easier to disperse in a mixture of an emulsified formula. The second hydrophobicity may further increase the hydrophobicity of the first modified titanium dioxide.

In one embodiment, the particle size of the first modified titanium dioxide is 150nm to 400nm, preferably 150nm to 200 nm.

In one embodiment, the first modified titanium dioxide is prepared by the following steps:

forming a first transition layer on the surface of the submicron-sized titanium dioxide: preparing a first salt solution, and mixing the first salt solution with submicron-grade titanium dioxide to obtain a first mixture. And adjusting the pH value of the first mixture to 4.5-6.0, and forming a first transition layer on the surface of the submicron-order titanium dioxide to obtain the titanium dioxide coated by the first transition layer.

Wherein the salt in the first salt solution may be sodium metaaluminate. The ratio of the mass of the salt in the salt solution to the mass of the submicron-sized titanium dioxide is 0.5:100 to 10.0:100, preferably 1.0:100 to 5.0:100, based on the submicron-sized titanium dioxide. The pH value of the first mixture is in the range of 4.5 to 6, preferably 5.0 to 6.0.

Forming a first hydrophobic layer on the surface of the first transition layer: preparing a solution of a first hydrophobizing agent, and mixing the solution of the first hydrophobizing agent with the titanium dioxide coated by the first transition layer to obtain a second mixture. And adjusting the pH value of the second mixture to 5.0-7.0, so that the first hydrophobic agent is coated on the surface of the aluminum hydroxide layer to form a first hydrophobic layer, and obtaining the titanium dioxide coated with the first transition layer and the first hydrophobic layer in sequence.

The first hydrophobic agent comprises disodium lauroyl glutamate, and the mass percentage of the first hydrophobic agent in the solution of the first hydrophobic agent is selected from 1-50%. The pH of the second mix is in the range of 5.0-7.0, preferably 5.5-6.5. The ratio of the mass of the first hydrophobizing agent in the first hydrophobizing agent solution to the mass of the submicron titanium dioxide is 0.5:100 to 10.0:100, preferably 1.0:100 to 5.0:100, based on the submicron titanium dioxide.

Forming a second hydrophobic layer on the surface of the first hydrophobic layer: and mixing the titanium dioxide coated with the first transition layer and the first hydrophobic layer with a second hydrophobic agent to obtain the first modified titanium dioxide.

Wherein the second hydrophobic agent comprises triethoxyoctylsilane. The ratio of the mass of the second hydrophobizing agent to the mass of the submicron-sized titanium dioxide is 0.5:100 to 10.0:100, preferably 1.0:100 to 5.0:100, based on the submicron-sized titanium dioxide.

In one embodiment, the material of the third hydrophobic layer comprises at least one of triethoxyoctylsilane and polydimethylsiloxane.

Wherein, the third hydrophobic layer comprises a hydrophobic group, which can improve the hydrophobicity of the nano-scale titanium dioxide.

In one embodiment, the particle size of the second modified titanium dioxide is 45nm to 55nm, preferably 50 nm.

In one embodiment, the second modified titanium dioxide is prepared by the following method:

forming a third hydrophobic layer: mixing the nano-scale titanium dioxide with a third hydrophobic agent, wherein the third hydrophobic agent can form a third hydrophobic layer on the surface of the silicon oxide layer to obtain second modified titanium dioxide.

The third hydrophobic agent is selected from any one of triethoxyoctylsilane and polydimethylsiloxane, and is preferably triethoxyoctylsilane. The mass ratio of the third hydrophobizing agent to the nanoscale titanium dioxide is 0.5:100 to 10.0:100, preferably 1.0:100 to 5.0:100, based on the nanoscale titanium dioxide.

Further, a second transition layer can be formed between the nano-scale titanium dioxide and the third hydrophobic layer. The second transition layer comprises silicon oxide or aluminum hydroxide, preferably silicon oxide.

The aluminum hydroxide in the second transition layer exists mainly in the form of AlO (OH), and the silicon oxide in the second transition layer exists mainly in the form of Si (OH)₄Can provide more active sites on the surface of the nano-scale titanium dioxide, so that the third hydrophobic layer is easier to coat on the nano-scale titanium dioxide.

The method of forming the second transition layer is as follows: preparing a second salt solution, and mixing the second salt solution with nano-scale titanium dioxide to obtain a third mixture. And adjusting the pH value of the third mixture to 6.5-8, and forming a second transition layer on the surface of the nano-scale silicon dioxide to obtain the nano-scale titanium dioxide coated by the second transition layer.

Wherein the salt in the second salt solution is selected from any one of sodium silicate, potassium silicate, sodium metaaluminate and aluminum sulfate, and sodium silicate is preferred. The pH of the third mix is in the range of 6.5-8, preferably 6.5-7. The ratio of the mass of the salt in the second salt solution to the mass of the nano-sized titanium dioxide is 0.1:100 to 10.0:100, preferably 0.5:100 to 5.0:100, based on the nano-sized titanium dioxide.

In one embodiment, the mass ratio of the first modified titanium dioxide to the second modified titanium dioxide in the cosmetic composition is 1:4 to 4:1, preferably 3:7 to 7: 3.

The invention also provides a cosmetic which comprises the cosmetic composition.

The cosmetic is selected from any one of foundation liquid, foundation cream, face cream, concealer, sunscreen cream, face cream and makeup base cream.

Hereinafter, the cosmetic composition will be further described with reference to specific examples.

Example 1

Preparing first modified titanium dioxide:

forming a first transition layer on the surface of the submicron-sized titanium dioxide: preparing a sodium metaaluminate solution, and mixing the sodium metaaluminate solution with submicron-grade titanium dioxide to obtain a first mixture. The ratio of the mass of sodium metaaluminate in the sodium metaaluminate solution to the mass of the submicron-sized titanium dioxide is 1.5:100, taking the submicron-sized titanium dioxide as a reference. And (3) using HCl solution to adjust the pH value of the first mixture to 5.5, wherein an aluminum hydroxide layer, namely a first transition layer, is formed on the surface of the submicron-order titanium dioxide, and the submicron-order titanium dioxide coated by the first transition layer is obtained.

Forming a first hydrophobic layer on the surface of the first transition layer: preparing a solution of disodium stearoyl glutamate, and mixing the solution of disodium stearoyl glutamate with submicron-grade titanium dioxide coated by the aluminum hydroxide layer to obtain a second mixture. Taking the submicron-sized titanium dioxide as a reference, the ratio of the mass of the disodium stearoyl glutamate in the solution of the disodium stearoyl glutamate to the mass of the submicron-sized titanium dioxide is 2.0: 100. The pH of the second mix was adjusted to 6.0. At the moment, the disodium stearyl glutamate is coated on the surface of the aluminum hydroxide layer to form a disodium stearyl glutamate layer, namely a first hydrophobic layer, and the titanium dioxide sequentially coated with the first transition layer and the first hydrophobic layer is obtained.

Forming a second hydrophobic layer on the surface of the first hydrophobic layer: and mixing the titanium dioxide coated with the first transition layer and the first hydrophobic layer with triethoxyoctylsilane. Wherein, taking the submicron-sized titanium dioxide as a standard, the ratio of the mass of the triethoxyoctylsilane to the mass of the submicron-sized titanium dioxide is 2.0: 100. At this time, triethoxyoctylsilane can be coated on the first hydrophobic layer to form a triethoxyoctylsilane layer, namely a second hydrophobic layer, so as to obtain the first modified titanium dioxide.

As can be seen from FIG. 1, the particle size of the first modified titanium dioxide is between 150nm and 400 nm.

Preparing second modified titanium dioxide:

the method of forming the second transition layer is as follows: preparing a sodium silicate solution, and mixing the sodium silicate solution with the nano-scale titanium dioxide to obtain a third mixture. Wherein, taking the nano-scale titanium dioxide as a reference, the ratio of the mass of the sodium silicate in the sodium silicate solution to the mass of the nano-scale titanium dioxide is 1.5: 100. The pH of the third mix was adjusted to 7.0 with hydrochloric acid. At this time, the silicon oxide layer is coated on the nano-scale titanium dioxide to form a silicon oxide layer, namely a second transition layer, and the nano-scale titanium dioxide coated by the second transition layer is obtained.

Forming a third hydrophobic layer on the surface of the second transition layer: and mixing the nano-scale titanium dioxide coated with the second transition layer with triethoxyoctylsilane, wherein the triethoxyoctylsilane can form a triethoxyoctylsilane layer, namely a third hydrophobic layer, on the surface of the second transition layer to obtain second modified titanium dioxide. Wherein, taking the nano-scale titanium dioxide as a reference, the ratio of the mass of the triethoxyoctylsilane to the mass of the nano-scale titanium dioxide is 2.0: 100.

As can be seen from fig. 2, the particle size of the first modified titanium dioxide was about 50 nm.

And dry-mixing the first modified titanium dioxide and the second modified titanium dioxide according to the mass ratio of 1:4 to obtain the cosmetic composition.

Example 2

The first modified titanium dioxide and the second modified titanium dioxide in example 1 were dry-blended at a mass ratio of 3:7 to obtain a cosmetic composition.

Example 3

The first modified titanium dioxide and the second modified titanium dioxide in example 1 were dry-blended at a mass ratio of 1:1 to obtain a cosmetic composition.

Example 4

The first modified titanium dioxide and the second modified titanium dioxide in example 1 were dry-blended at a mass ratio of 7:3 to obtain a cosmetic composition.

Example 5

The first modified titanium dioxide and the second modified titanium dioxide in example 1 were dry-blended at a mass ratio of 4:1 to obtain a cosmetic composition.

Blank control group:

an emulsion formulation was prepared as a blank control according to the component ratios of table 1.

TABLE 1

Application example 1:

the cosmetic composition prepared in example 1 was added to a blank formulation to obtain a cosmetic, wherein the cosmetic composition was 20% by mass.

Application example 2:

the cosmetic composition prepared in example 2 was added to a blank formulation to obtain a cosmetic, wherein the cosmetic composition was 20% by mass.

Application example 3

The cosmetic composition prepared in example 3 was added to a blank formulation to obtain a cosmetic, wherein the cosmetic composition was 20% by mass.

Application example 4

The cosmetic composition prepared in example 4 was added to a blank formulation to obtain a cosmetic, wherein the cosmetic composition was 20% by mass.

Application example 5

The cosmetic composition prepared in example 5 was added to a blank formulation to obtain a cosmetic, wherein the cosmetic composition was 20% by mass.

Application comparative example 1:

the second modified titanium dioxide prepared in example 1 was added to a blank formulation to obtain a cosmetic, wherein the cosmetic composition was 20% by mass.

Application comparative example 2:

the first modified titanium dioxide prepared in example 1 was added to a blank formulation to obtain a cosmetic, wherein the cosmetic composition was 20% by mass.

Application comparative example 3:

preparing micron-sized titanium dioxide only coating the first transition layer: preparing a sodium metaaluminate solution, and mixing the sodium metaaluminate solution with micron-sized titanium dioxide to obtain a first mixture. Taking the micron-sized titanium dioxide as a reference, wherein the ratio of the mass of the sodium metaaluminate in the sodium metaaluminate solution to the mass of the micron-sized titanium dioxide is 1.5: 100. And (3) using HCl solution to adjust the pH value of the first mixture to 5.5, wherein an aluminum hydroxide layer, namely a first transition layer, is formed on the surface of the micron-sized titanium dioxide, and the micron-sized titanium dioxide coated by the first transition layer is obtained.

Using the method for producing the second modified titanium oxide in example 1, a second modified titanium oxide powder was produced. Uniformly mixing the micron-sized titanium dioxide powder coated with the first transition layer and the second modified titanium dioxide powder according to the mass ratio of 1:1 to obtain the cosmetic composition.

Adding the cosmetic composition into a blank formula to obtain a cosmetic, wherein the mass percent of the cosmetic composition is 20%.

Application comparative example 4:

preparing micron-sized titanium dioxide coating only the first hydrophobic layer: preparing a solution of disodium stearoyl glutamate, and mixing the solution of disodium stearoyl glutamate with micron-sized titanium dioxide to obtain a mixture. Taking the micron-sized titanium dioxide as a reference, wherein the ratio of the mass of the disodium stearoyl glutamate in the solution of the disodium stearoyl glutamate to the mass of the micron-sized titanium dioxide is 2.0: 100. The pH of the second mix was adjusted to 6.0. At the moment, the disodium stearyl glutamate is coated on the surface of the micron-sized titanium dioxide to form a disodium stearyl glutamate layer, namely a first hydrophobic layer, so that the titanium dioxide coated with the first hydrophobic layer is obtained.

Using the method for producing the second modified titanium oxide in example 1, a second modified titanium oxide powder was produced. Uniformly mixing the micron-sized titanium dioxide powder wrapping the first hydrophobic layer and the second modified titanium dioxide powder according to the mass ratio of 1:1 to obtain the cosmetic composition.

Adding the cosmetic composition into a blank formula to obtain a cosmetic, wherein the mass percent of the cosmetic composition is 20%.

Application comparative example 5:

preparing micron-sized titanium dioxide only coating the second hydrophobic layer: mixing the micron-sized titanium dioxide with triethoxycaprylylsilane. Wherein, taking the micron-sized titanium dioxide as a reference, the ratio of the mass of the triethoxyoctylsilane to the mass of the micron-sized titanium dioxide is 2.0: 100. At the moment, the triethoxyoctylsilane can be coated on the micron-sized titanium dioxide to form a triethoxyoctylsilane layer, namely a second hydrophobic layer, and the micron-sized titanium dioxide only coated with the second hydrophobic layer is obtained.

Using the method for producing the second modified titanium oxide in example 1, a second modified titanium oxide powder was produced. And uniformly mixing the micron-sized titanium dioxide powder coated with the second hydrophobic layer and the second modified titanium dioxide powder according to the mass ratio of 1:1 to obtain the cosmetic composition.

Adding the cosmetic composition into a blank formula to obtain a cosmetic, wherein the mass percent of the cosmetic composition is 20%.

Application comparative example 6:

preparing nano-scale titanium dioxide only coating the first transition layer and the first hydrophobic layer: preparing a sodium metaaluminate solution, and mixing the sodium metaaluminate solution with micron-sized titanium dioxide to obtain a first mixture. Taking the micron-sized titanium dioxide as a reference, wherein the ratio of the mass of the sodium metaaluminate in the sodium metaaluminate solution to the mass of the micron-sized titanium dioxide is 1.5: 100. And (3) using HCl solution to adjust the pH value of the first mixture to 5.5, wherein an aluminum hydroxide layer, namely a first transition layer, is formed on the surface of the micron-sized titanium dioxide, and the micron-sized titanium dioxide coated by the first transition layer is obtained. Preparing a solution of disodium stearoyl glutamate, and mixing the solution of disodium stearoyl glutamate with micron-sized titanium dioxide coated by the aluminum hydroxide layer to obtain a second mixture. Taking the micron-sized titanium dioxide as a reference, wherein the ratio of the mass of the disodium stearoyl glutamate in the solution of the disodium stearoyl glutamate to the mass of the micron-sized titanium dioxide is 2.0: 100. The pH of the second mix was adjusted to 6.0. At the moment, the disodium stearyl glutamate is coated on the surface of the aluminum hydroxide layer to form a disodium stearyl glutamate layer, namely a first hydrophobic layer, and the titanium dioxide sequentially coated with the first transition layer and the first hydrophobic layer is obtained.

Using the method for producing the second modified titanium oxide in example 1, a second modified titanium oxide powder was produced. Uniformly mixing the micron-sized titanium dioxide powder of the first transition layer and the first hydrophobic layer with the second modified titanium dioxide powder according to the mass ratio of 1:1 to obtain the cosmetic composition.

Adding the cosmetic composition into a blank formula to obtain a cosmetic, wherein the mass percent of the cosmetic composition is 20%.

Application comparative example 7:

preparing nano-scale titanium dioxide only covering the first transition layer and the second hydrophobic layer: preparing a sodium metaaluminate solution, and mixing the sodium metaaluminate solution with micron-sized titanium dioxide to obtain a first mixture. Taking the micron-sized titanium dioxide as a reference, wherein the ratio of the mass of the sodium metaaluminate in the sodium metaaluminate solution to the mass of the micron-sized titanium dioxide is 1.5: 100. And (3) using HCl solution to adjust the pH value of the first mixture to 5.5, wherein an aluminum hydroxide layer, namely a first transition layer, is formed on the surface of the micron-sized titanium dioxide, and the micron-sized titanium dioxide coated by the first transition layer is obtained. And mixing the titanium dioxide coated with the first transition layer with triethoxyoctylsilane. Wherein, taking the micron-sized titanium dioxide as a reference, the ratio of the mass of the triethoxyoctylsilane to the mass of the micron-sized titanium dioxide is 2.0: 100. At this time, triethoxyoctylsilane can be coated on the first hydrophobic layer to form a triethoxyoctylsilane layer, namely a second hydrophobic layer, so as to obtain the first modified titanium dioxide.

Using the method for producing the second modified titanium oxide in example 1, a second modified titanium oxide powder was produced. Uniformly mixing the micron-sized titanium dioxide powder and the second modified titanium dioxide powder which coat the first transition layer and the second hydrophobic layer according to the mass ratio of 1:1 to obtain the cosmetic composition.

Adding the cosmetic composition into a blank formula to obtain a cosmetic, wherein the mass percent of the cosmetic composition is 20%.

Comparative application example 8

The first modified titanium dioxide and the second modified titanium dioxide in example 1 were dry-blended at a mass ratio of 1:9 to obtain a cosmetic composition.

Adding the cosmetic composition into a blank formula to obtain a cosmetic, wherein the mass percent of the cosmetic composition is 20%.

Comparative application 9

The first modified titanium dioxide and the second modified titanium dioxide in example 1 were dry-blended at a mass ratio of 9:1 to obtain a cosmetic composition.

Adding the cosmetic composition into a blank formula to obtain a cosmetic, wherein the mass percent of the cosmetic composition is 20%.

Test of sunscreen Properties of cosmetic

The sunscreen performance of the cosmetic is tested by using an SPF-290AS type sunscreen coefficient test analysis system of Solar Light company, and the sunscreen performance test steps are AS follows:

1) 0.05 g of sample was taken using a syringe;

2) the samples were spotted evenly on 50mm by 50mm PMMA test plates using a syringe;

3) uniformly smearing the sample;

4) storing in dark for 20 min;

5) and (6) testing.

The results are shown in Table 1.

As can be seen from table 1, comparing application example 3 with application comparative example 1 and application comparative example 2, the sunscreen effect obtained in the cosmetic composition of the present invention is much higher than the sum of sunscreen effects of the single ingredients used alone. Comparing application example 3 with application comparative example 3 to application comparative example 7, it can be seen that the combination of the cosmetic composition of the present invention has a better sunscreen effect than the addition of other ingredients at the same addition amount. Compared with application comparative example 8 and application comparative example 9, it can be seen that the cosmetic composition of the present invention has a better sunscreen effect than the composition having the other component ratio when the components are the same.

Table 1 cosmetic sunscreen performance test results

Note: other ingredients are described in the specific examples.

Testing of cosmetic stability

The cosmetics prepared in application example 1-application example 5 and application comparative example 1-application comparative example 9 were subjected to a high temperature stability test in an environment at a temperature of 48 ℃. + -. 2 ℃ and a humidity of 60% RH. + -. 5% RH, and the test results are shown in Table 2.

Table 2 cosmetic stability test results

As can be seen from table 2, the cosmetic including the cosmetic composition of the present invention has good stability, and can be maintained stable for 30 days in a high temperature environment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.