CN114366686A

CN114366686A - Surface treatment powder and preparation method and application thereof

Info

Publication number: CN114366686A
Application number: CN202111509512.7A
Authority: CN
Inventors: 陈宗乐; 吴建军; 张文彬; 刘晗
Original assignee: Shanghai Co Fun Biotech Co ltd
Current assignee: Shanghai Co Fun Biotech Co ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-04-19
Anticipated expiration: 2041-12-10
Also published as: CN114366686B

Abstract

The invention relates to surface treatment powder, which comprises base powder, and prebiotics and glycerol polymer attached to the base powder, wherein the prebiotics account for 0.1-8% of the surface treatment powder by mass. The invention also relates to a preparation method of the surface treatment powder and application of the surface treatment powder in aqueous cosmetics. The surface treatment powder has excellent hydrophilicity and dispersibility, and the water-based cosmetic using the surface treatment powder has super stability and is not easy to settle and delaminate after being placed for a long time.

Description

Surface treatment powder and preparation method and application thereof

Technical Field

The invention relates to the technical field of cosmetics, in particular to surface treatment powder and a preparation method and application thereof.

Background

The traditional organic surface treatment mode of powder for cosmetics comprises the following steps: organic silicon surface treatment, fluorine-containing surface treatment, titanate coupling agent surface treatment, organic acid and salt surface treatment, amino acid surface treatment and composite surface treatment formed by any two or more treatment types.

The organic silicon surface treatment is to combine organic silicon molecules on the surface of the powder through chemical bonds, so that the powder has excellent hydrophobicity, ductility, fluidity, dispersibility and adsorbability, and is suitable for cosmetics of a silicone oil system. The fluorine-containing surface treatment is to further improve the surface treatment effect of the organosilicon surface treatment by the synergistic effect of fluorine-containing groups. The titanate coupling agent is subjected to surface treatment by chemically bonding alkoxy groups and hydroxyl groups on the surface of the powder, so that a uniform isostearate group film is formed on the surface of the powder, and the coating has excellent lipophilicity, skin-sticking property and hydrophobicity. The surface treatment of the organic acid and the salt thereof can change the charge on the surface of the powder, and the surface treatment of the amino acid can introduce specific active groups, so that the powder shows more excellent skin-friendly effect.

Although these surface treatment methods can improve the use effects of the powder in terms of hydrophobicity, oleophobicity, skin feel, and the like, when these surface treatment powders are used in an aqueous cosmetic, problems such as sedimentation, delamination, and the like are still likely to occur, and the long-term stability is not good.

Disclosure of Invention

In view of the above, it is necessary to provide a surface-treated powder, a method for preparing the same, and applications thereof; the surface treatment powder has excellent hydrophilicity and dispersibility, and the water-based cosmetic using the surface treatment powder has super-strong stability and is not easy to settle and agglomerate after being placed for a long time.

The surface treatment powder comprises a base powder, and prebiotics and a glycerol polymer which are attached to the base powder, wherein the glycerol polymer is selected from glycerol polymers, and the prebiotics account for 0.1-8% of the surface treatment powder in mass.

In one embodiment, the mass of the glycerol polymer is 0.1-15% of the mass of the surface treatment powder.

In one embodiment, the prebiotic comprises at least one of fructooligosaccharide, galactooligosaccharide, fructooligosaccharide, soy oligosaccharide, galactooligosaccharide, isomalto-oligosaccharide, xylooligosaccharide, mannooligosaccharide, chitooligosaccharide, lactitol, isomaltulose, soy oligosaccharide, xylooligosaccharide, maltooligosaccharide.

In one embodiment, the glycerol polymer comprises at least one of polyglycerol-4, polyglycerol-6, polyglycerol-8, and polyglycerol-10.

In one embodiment, the base powder includes at least one of micro-sized titanium dioxide, nano-sized zinc oxide, iron oxide yellow, iron oxide red, iron oxide black, chromium oxide green, ultramarine, talc, mica, pearl, kaolin, barium sulfate, calcium sulfate hydrate, pearl powder, perlite, magnesium sulfate, aluminum sulfate, bismuth oxychloride, zinc carbonate, calcium carbonate, magnesium carbonate, calcium pyrophosphate, and calcium phosphate.

In the surface treatment powder, the glycerol polymer can provide abundant polar hydroxyl groups to form a strong hydrogen bond effect, so that the prebiotics and the glycerol polymer can be firmly and uniformly coated on the surface of the basic powder, and the surface treatment powder has good hydrophilic performance. Meanwhile, the coating layer formed by the prebiotics and the glycerol polymer can provide good steric hindrance effect for the coated basic powder, so that the surface treatment powder has excellent dispersibility and super-strong stability, is not easy to agglomerate, and can be better applied to water-based cosmetics.

The preparation method of the surface treatment powder comprises the following steps:

mixing prebiotics with water to obtain a prebiotics water solution;

mixing a glycerol polymer with the aqueous solution of the prebiotics to obtain a mixed treatment fluid;

and spraying the mixed treatment liquid on the base powder under the condition of stirring, and drying and crushing to obtain the surface treatment powder.

In one embodiment, the prebiotics are present in an amount of 0.1% to 100% by weight of the water.

In one embodiment, the mass of the prebiotics is 0.1% -10% of the mass of the basic powder.

In one embodiment, the mass of the glycerin polymer is 0.1% -20% of the mass of the base powder.

According to the preparation method of the surface treatment powder, the prebiotics which are solid at normal temperature are dissolved and used for wetting the basic powder, and the dissolved prebiotics can be recrystallized and deposited on the surface of the basic powder in the drying process, so that the prebiotics are more firmly coated, and the coating utilization rate is up to more than 90%. Moreover, the prebiotics and the glycerol polymer are completely dissolved respectively, and then the basic powder is coated, so that the prebiotics and the glycerol polymer are more firmly coated, and the problem of a large amount of agglomerated hard particles caused by incomplete dissolution of the prebiotics and high viscosity of the glycerol polymer in the coating process can be solved, thereby effectively improving the coating quality and being beneficial to obtaining the surface treatment powder which is uniform in coating, hydrophilic and easy to disperse of the prebiotics and the glycerol polymer.

An application of the surface treatment powder in aqueous cosmetics.

The surface treatment powder can be widely used in aqueous cosmetics as a raw material, so that the aqueous cosmetics have super-strong stability, are not easy to settle and delaminate after being placed for a long time, have good compatibility with other components, and are beneficial to formulation design of the cosmetics so as to obtain the cosmetics which have stable quality, can improve skin micro-ecology and have excellent safety to organisms and environment.

Drawings

FIG. 1 is a scanning electron microscope picture of the surface-treated powder prepared in example 1;

FIG. 2 is a graph showing the effect of dispersibility in water of the surface-treated powder prepared in example 1 and the surface-treated powder prepared in comparative example 1.

Detailed Description

The surface-treated powder of the present invention, a method for producing the same, and applications thereof will be further described below.

The surface treatment powder provided by the invention comprises a base powder body, and prebiotics and a glycerol polymer which are attached to the base powder body, wherein the prebiotics account for 0.1-8% of the surface treatment powder body in mass.

In the surface treatment powder, the glycerol polymer can provide abundant polar hydroxyl groups, so that a strong hydrogen bond effect is formed, the prebiotics and the glycerol polymer can be firmly and uniformly coated on the surface of the basic powder, the hydrophilic effect of the surface treatment powder is further enhanced, and the dispersibility is improved.

Meanwhile, the coating layer formed by the prebiotics and the glycerol polymer can provide good steric hindrance effect for the coated basic powder, so that the surface treatment powder has excellent dispersibility and super-strong stability, is not easy to agglomerate, and can be better applied to water-based cosmetics.

In order to ensure the coating effect of the prebiotics, the quality of the prebiotics is preferably 0.1-5% of the surface treatment powder. The mass of the glycerol polymer is 0.1-15%, preferably 5-15% of the mass of the surface treatment powder.

Optionally, the prebiotics include at least one of fructo-oligosaccharide, galacto-oligosaccharide, fructo-oligosaccharide, soy oligosaccharide, galacto-oligosaccharide, isomalto-oligosaccharide, xylooligosaccharide, mannooligosaccharide, chitooligosaccharide, lactitol, isomaltulose, soy oligosaccharide, xylo-oligosaccharide, malto-oligosaccharide; the glycerol polymer comprises at least one of polyglycerol-4, polyglycerol-6, polyglycerol-8 and polyglycerol-10.

Optionally, the base powder includes at least one of micron-sized titanium dioxide, nano-sized zinc oxide, iron oxide yellow, iron oxide red, iron oxide black, chromium oxide green, ultramarine, talc, mica, pearl, kaolin, barium sulfate, calcium sulfate hydrate, pearl powder, perlite, magnesium sulfate, aluminum sulfate, bismuth oxychloride, zinc carbonate, calcium carbonate, magnesium carbonate, calcium pyrophosphate, and calcium phosphate. Wherein mica is selected from at least one of sericite, synthetic fluorophlogopite and crystal mica, zinc carbonate is selected from basic zinc carbonate, and magnesium carbonate is selected from basic magnesium carbonate.

The invention also provides a preparation method of the surface treatment powder, which comprises the following steps:

s1, mixing the prebiotics with water to obtain a prebiotics water solution;

s2, mixing a glycerol polymer with the aqueous solution of the prebiotics to obtain a mixed treatment fluid;

and S3, spraying the mixed treatment liquid on the base powder under the condition of stirring, and drying and crushing to obtain the surface treatment powder.

Because the prebiotics are solid at normal temperature and have poor solubility in the glycerol polymer, if the prebiotics are directly mixed with the glycerol polymer, the prebiotics are not completely dissolved due to high viscosity of the glycerol polymer, so that the prebiotics are not uniformly coated and a large amount of hard particles are generated, thereby leading to poor coating quality of the surface treatment powder, and simultaneously, the coating utilization rate of the prebiotics is low, and the problems of raw material waste and the like exist.

In addition, although the glycerol polymer can provide abundant polar hydroxyl groups, the adsorption effect of the glycerol polymer and the prebiotics on the surface of the base powder is effectively enhanced, the glycerol polymer has certain viscosity, so that the glycerol polymer is coated unevenly, and even the base powder is agglomerated.

Therefore, in step S1, the present invention mixes the prebiotics with water and dissolves them completely to form the aqueous solution of the prebiotics, and then mixes the glycerin polymer with the aqueous solution of the prebiotics in step S2 to obtain the mixed treatment fluid. The steps S1-S2 can avoid the problem that a large amount of hard agglomerated particles are generated due to incomplete dissolution of the prebiotics and high viscosity of the glycerol polymer in the coating process, so that the coating quality is effectively improved, and the surface treatment powder which is uniformly coated with the prebiotics and the glycerol polymer, hydrophilic and easy to disperse is favorably obtained; meanwhile, the coating utilization rate of the prebiotics is improved.

In one embodiment, in order to ensure complete dissolution of the prebiotics and achieve a certain coating amount of the prebiotics, the mass of the prebiotics is 0.1% to 100%, preferably 0.1% to 50%, of the mass of the water; the mass of the prebiotics is 0.1-10%, preferably 0.1-9% of the mass of the basic powder.

In order to coordinate the dosage of the glycerin polymer and the prebiotics and ensure that the viscosity of the mixed treatment fluid is appropriate, the mass of the glycerin polymer is 0.1-20%, preferably 5-15% of the mass of the base powder.

In step S3, the dissolved prebiotics can be recrystallized and deposited on the surface of the base powder through the drying process, and compared with the coating action that depends on intermolecular forces, the coating method of the present invention makes the prebiotics coated more firmly and not easy to fall off, and the coating utilization rate of the prebiotics is up to more than 90%, and basically 100% of coating effect can be realized, which effectively improves the utilization rate of raw materials and reduces the waste of raw materials.

Optionally, the temperature for drying after mixing and stirring the basic powder and the mixed treatment liquid is 100-130 ℃, preferably 105-120 ℃, and the time is 0.5-4 h, preferably 1-3 h.

The invention also provides an application of the surface treatment powder in aqueous cosmetics.

Hereinafter, the surface-treated powder, the method for preparing the same, and the use thereof will be further described with reference to the following specific examples.

Example 1

Uniformly mixing 2g of fructo-oligosaccharide and 5g of water to obtain an aqueous solution of the fructo-oligosaccharide; uniformly mixing 5g of polyglycerol-4 and an aqueous solution of fructo-oligosaccharide to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment solution on 100g of micron-sized titanium dioxide, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder shown in figure 1.

Example 2

Uniformly mixing 2g of fructo-oligosaccharide and 5g of water to obtain an aqueous solution of the fructo-oligosaccharide; uniformly mixing 5g of polyglycerol-6 and an aqueous solution of fructo-oligosaccharide to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment liquid on 100g of iron oxide yellow, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Example 3

Uniformly mixing 2g of fructo-oligosaccharide and 5g of water to obtain an aqueous solution of the fructo-oligosaccharide; uniformly mixing 5g of polyglycerol-10 and an aqueous solution of fructo-oligosaccharide to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment liquid on 100g of iron oxide red, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Example 4

Uniformly mixing 2g of fructo-oligosaccharide and 5g of water to obtain an aqueous solution of the fructo-oligosaccharide; uniformly mixing 5g of polyglycerol-10 and an aqueous solution of fructo-oligosaccharide to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment liquid on 100g of iron oxide black, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Example 5

Uniformly mixing 2g of fructo-oligosaccharide and 5g of water to obtain an aqueous solution of the fructo-oligosaccharide; uniformly mixing 5g of polyglycerol-6 and an aqueous solution of fructo-oligosaccharide to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment solution on 100g of nano zinc oxide, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Example 6

Uniformly mixing 2g of galacto-oligosaccharide and 5g of water to obtain an aqueous solution of lactulose; uniformly mixing 5g of polyglycerol-4 with an aqueous solution of lactulose to obtain a mixed treatment fluid; under the condition of stirring, spraying the mixed treatment solution on 100g of micron-sized titanium dioxide, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Example 7

Example 7 differs from example 1 only in that the base powder of example 7 is mica.

Example 8

Example 8 differs from example 1 only in that the base powder of example 8 is pearl powder.

Example 9

Example 9 differs from example 1 only in that the base powder of example 9 is zinc carbonate.

Example 10

Example 10 differs from example 1 only in that the base powder of example 10 is calcium carbonate.

Example 11

Example 11 differs from example 1 only in that example 11 has 0.5g of fructooligosaccharides.

Example 12

Example 12 differs from example 1 only in that example 12 has 3.5g of fructooligosaccharides.

Example 13

Example 13 differs from example 1 only in that example 13 has 5g of fructooligosaccharides.

Example 14

Example 14 differs from example 1 only in that example 14 has 6.5g of fructooligosaccharides.

Example 15

Example 15 differs from example 1 only in that example 15 has 8g of fructooligosaccharides.

Comparative example 1

Directly mixing 2g of fructo-oligosaccharide, 5g of water and 5g of polyglycerol-4 to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment solution on 100g of micron-sized titanium dioxide, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Comparative example 2

Directly mixing 2g of fructo-oligosaccharide and 5g of polyglycerol-4 to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment solution on 100g of micron-sized titanium dioxide, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Comparative example 3

2g of D-panthenol is mixed with 5g of water uniformly to obtain an aqueous solution of D-panthenol; uniformly mixing 5g of polyglycerol-4 and an aqueous solution of D-panthenol to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment solution on 100g of micron-sized titanium dioxide, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Comparative example 4

Uniformly mixing 2g of fructo-oligosaccharide and 5g of water to obtain an aqueous solution of the fructo-oligosaccharide; uniformly mixing 5g of glycerol and an aqueous solution of fructo-oligosaccharide to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment solution on 100g of micron-sized titanium dioxide, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

Comparative example 5

Uniformly mixing 2g of fructo-oligosaccharide and 5g of water to obtain an aqueous solution of the fructo-oligosaccharide; uniformly mixing 5g of PEG-8 with an aqueous solution of fructo-oligosaccharide to obtain a mixed treatment solution; under the condition of stirring, spraying the mixed treatment solution on 100g of micron-sized titanium dioxide, uniformly stirring, transferring to a drying oven, drying at 120 ℃ for 2h, and carrying out jet milling to obtain the surface treatment powder.

The coating effect of the rows 1 to 15 of the examples is tested, and the test method comprises the following steps: the surface-treated powder was mixed with a strong acid and heated, and identified using resorcinol. The results are all red, which indicates that the fructo-oligosaccharide is successfully coated on the basic powder.

Examples 1-15 were tested for coating integrity by the following test methods: mixing and stirring the surface treatment powder and water for 1h under the condition of 80 ℃ water bath, filtering, and then identifying the filtered powder by using resorcinol, wherein the result shows that the product is red and consistent in color, which shows that a large amount of fructo-oligosaccharide still exists on the surface of the surface treatment powder after a strict washing process, and the coating firmness of the fructo-oligosaccharide is good.

The coating utilization rates of prebiotics and D-panthenol in the surface-treated powders obtained in examples 1 to 15 and the powders obtained in comparative examples 1 to 5 are shown in Table 1.

TABLE 1

As can be seen from table 1, the coating utilization rates of the moisturizing component in the lipophilic dispersion powder coated with the moisturizing component obtained in examples 1 to 15 all reached 90% or more, while the coating utilization rates of comparative examples 1 to 5 reached only 51.2% at the highest, and therefore, the preparation method provided by the present invention can achieve a coating utilization rate of the moisturizing component as high as 90% or more.

The surface-treated powders obtained in examples 1 to 15 and the powders obtained in comparative examples 1 to 5 were measured for their particle size distribution, and the results are shown in Table 2.

TABLE 2

As can be seen from fig. 1 and table 2, the particle size distribution sizes of the surface-treated powders obtained in examples 1 to 15 of the present invention are relatively uniform, while the powders obtained in comparative examples 1 to 5 generate hard particles due to agglomeration and agglomeration, and the difference in particle size distribution sizes is relatively large, which indicates that the surface-treated powders prepared by the present solution have uniform particles, good dispersibility, and no agglomeration.

The base powders of examples 1 to 15 and comparative examples 1 to 5, the obtained surface-treated powders, and the surface-treated powders after washing treatment were subjected to water absorption value tests, and the results are shown in Table 3. Washing treatment: mixing the surface treatment powder with water under the condition of 80 ℃ water bath, stirring for 1h, filtering and drying.

TABLE 3

As is clear from table 3, the surface-treated powders obtained in examples 1 to 15 of the present invention were excellent in water-absorbing effect and could maintain the water-absorbing effect before washing after washing, which also demonstrates that the surface-treated powders of the present invention had good prebiotic coating firmness.

The surface-treated powder obtained in example 1 and the surface-treated powder obtained in comparative example 1 were subjected to a dispersibility test, and the test results were recorded in table 4. The test method comprises the following steps: the surface-treated powder obtained in example 1 and the surface-treated powder obtained in comparative example 1 were each prepared as a 1% aqueous dispersion, and were allowed to stand for 30 minutes after dispersion by simultaneous oscillation, and the sedimentation of particles of the surface-treated powder at the bottom was observed, as shown in fig. 2, a is a graph showing the dispersion effect of the 1% aqueous dispersion of the surface-treated powder obtained in example 1 after standing, and B is a graph showing the dispersion effect of the 1% aqueous dispersion of the surface-treated powder obtained in comparative example 1 after standing, and as can be seen from fig. 2, the surface-treated powder obtained in example 1 had almost no powder sediment at the bottom and was excellent in dispersion effect, while the surface-treated powder obtained in comparative example 1 had a large amount of powder sediment at the bottom and was poor in dispersion effect.

The surface-treated powders obtained in examples 2 to 15 and the powders obtained in comparative examples 2 to 4 were subjected to a dispersibility test, and the results are shown in Table 4.

TABLE 4

As is clear from Table 4, the surface-treated powders obtained in examples 1 to 15 of the present invention were self-dispersible in both water and propylene glycol and free from agglomerated particles, whereas the powders obtained in comparative examples 1 to 5 were poor in the dispersing effect and liable to generate agglomerated particles. Therefore, the surface-treated powder obtained by the present invention has excellent dispersibility.

Application example 1

The surface-treated powders obtained in examples 1 and 6 of the present invention and the surface-treated powders obtained in comparative examples 1 and 3 were prepared according to the formulation shown in table 5, to obtain foundation liquid samples a to d.

The preparation process comprises the following steps: mixing and stirring the phase A, and heating to 75 ℃ for later use; uniformly stirring the phase C, and heating to 75 ℃; adding the powder of the phase B into the phase C, uniformly stirring and dispersing, and homogenizing for 30 seconds; slowly adding the phase A into the phase BC under the condition of rapid stirring, and homogenizing for 1 minute after complete emulsification; adding the phase D into the phase ABC under the condition of rapid stirring, uniformly stirring, and homogenizing for 1 minute; cooling to below 45 deg.C, adding phase E, stirring, and discharging to obtain foundation solution.

TABLE 5

And (3) carrying out stability test on the prepared foundation liquid samples a-d, wherein the test method comprises the following steps: freeze-thaw cycle test (one cycle including high temperature-8 + -2 deg.C, 24 hr and low temperature 40 + -1 deg.C, 24 hr) and normal temperature stability test (15-25 deg.C). The test results are shown in table 6.

TABLE 6

As can be seen from table 6, the foundation fluid samples a and b prepared from the surface-treated powder obtained in examples 1 and 6 of the present invention still showed uniform dispersion effect without sedimentation and delamination after the freeze-thaw cycle and the normal temperature test for three months, while the foundation fluid samples c and d prepared from the surface-treated powder obtained in comparative examples 1 and 3 started to sediment after the second time of the freeze-thaw cycle and the second month of the normal temperature test, respectively, and showed significant delamination after the third time of the freeze-thaw cycle and the third month of the normal temperature test. Therefore, the foundation solution prepared from the surface-treated powder obtained in examples 1 and 6 of the present invention has superior stability.

Application example 2

The surface-treated powders obtained in examples 1 and 6 of the present invention and the powders obtained in comparative examples 1 and 3 were prepared according to the formulation shown in Table 7 to obtain toner samples a to d.

The preparation process comprises the following steps: mixing and stirring the phase A, and heating to 75 ℃ for later use; uniformly stirring the phase C, and heating to 75 ℃; adding the powder of the phase B into the phase C, uniformly stirring and dispersing, and homogenizing for 30 seconds; slowly adding the phase A into the phase BC under the condition of rapid stirring, and homogenizing for 1 minute after complete emulsification; adding the phase D into the phase ABC under the condition of rapid stirring, uniformly stirring, and homogenizing for 1 minute; cooling to below 45 ℃, adding the phase E, uniformly stirring and discharging to obtain the toner.

TABLE 7

And (3) carrying out stability test on the prepared toner samples a-d, wherein the test method comprises the following steps: freeze-thaw cycle test (one cycle including high temperature-8 + -2 deg.C, 24 hr and low temperature 40 + -1 deg.C, 24 hr) and normal temperature stability test (15-25 deg.C). The test results are shown in table 8.

TABLE 8

As can be seen from table 8, the toner samples a and b prepared from the surface-treated powder obtained in examples 1 and 6 of the present invention still showed uniform dispersion effect without sedimentation and delamination after the freeze-thaw cycle and the room temperature test for three months, while the toner samples c and d prepared from the surface-treated powder obtained in comparative examples 1 and 3 began to sediment after the second time of the freeze-thaw cycle and the second month of the room temperature test, respectively, and showed significant delamination after the third time of the freeze-thaw cycle and the third month of the room temperature test. Therefore, the toner prepared from the surface treatment powder obtained in the embodiments 1 and 6 of the invention has super-strong stability.

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.

Claims

1. The surface treatment powder is characterized by comprising a base powder, and prebiotics and a glycerol polymer which are attached to the base powder, wherein the prebiotics account for 0.1-8% of the surface treatment powder by mass.

2. The surface-treated powder according to claim 1, wherein the mass of the glycerin polymer is 0.1% to 15% of the mass of the surface-treated powder.

3. The surface-treated powder according to claim 1, wherein the prebiotic comprises at least one of fructooligosaccharide, galactooligosaccharide, fructooligosaccharide, soy oligosaccharide, galactooligosaccharide, isomaltooligosaccharide, xylooligosaccharide, mannooligosaccharide, chitooligosaccharide, lactitol, isomaltulose, soy oligosaccharide, xylooligosaccharide, and maltooligosaccharide.

4. The surface-treated powder according to claim 1, wherein the glycerin polymer comprises at least one of polyglycerin-4, polyglycerin-6, polyglycerin-8 and polyglycerin-10.

5. The surface-treated powder according to claim 1, wherein the base powder comprises at least one of micro-sized titanium dioxide, nano-sized zinc oxide, yellow iron oxide, red iron oxide, black iron oxide, green chromium oxide, ultramarine, talc, mica, pearl, kaolin, barium sulfate, calcium sulfate hydrate, pearl powder, perlite, magnesium sulfate, aluminum sulfate, bismuth oxychloride, zinc carbonate, calcium carbonate, magnesium carbonate, calcium pyrophosphate, and calcium phosphate.

6. The method for producing the surface-treated powder according to any one of claims 1 to 5, comprising the steps of:

mixing prebiotics with water to obtain a prebiotics water solution;

mixing a glycerol polymer with the aqueous solution of the prebiotics to obtain a mixed treatment fluid; and

7. The method for preparing surface-treated powder according to claim 6, wherein the prebiotics are 0.1 to 100% by mass of the water.

8. The method according to claim 6, wherein the prebiotic is 0.1 to 10% by mass of the base powder.

9. The method according to claim 6, wherein the mass of the glycerin polymer is 0.1% to 20% of the mass of the base powder.

10. Use of the surface-treated powder according to any one of claims 1 to 5 in an aqueous cosmetic.