Modified toner, method for preparing the same, and use thereof in foundation

Abstract

The application belongs to the technical field of cosmetics, and particularly relates to modified color powder, a preparation method thereof and application of the modified color powder in foundation liquid. The modified color powder is obtained by grinding and compounding modified inorganic color powder and mica powder; the modified inorganic color powder is modified by using modifier A and modifier B in sequence; the modifier A is sodium stearoyl glutamate and / or disodium stearoyl glutamate; and the modifier B is low canola oil and diisostearyl malate. The modified color powder provided by the application has excellent acid and alkali resistance, and still has excellent extensibility, anti-dullness and stability when the use amount in the foundation liquid is up to 30%.

Description

Technical Field

[0001] This invention belongs to the field of cosmetic technology, specifically relating to a modified color powder, its preparation method, and its application in foundation liquid. Background Technology

[0002] Pigments play a crucial role in cosmetics by providing a good appearance, colorfastness, and concealing effect. They are an essential component of cosmetics. Pigments can be divided into inorganic and organic pigments. Most inorganic pigments are metal oxides, such as titanium dioxide, zinc oxide, iron oxide red, iron oxide yellow, and iron oxide black. Foundation bases are typically composed of hydrophobic components such as oils, silicone oils, and esters. Inorganic pigments, due to their hydrophilic nature, are prone to clumping and agglomeration when directly applied to foundation, resulting in poor stability, coverage, and staying power.

[0003] Common pigment treatment agents include organosiloxanes, alkylsilanes, metal soaps, titanates, lecithin, amino acids, and organosilicon elastomers, each with its own advantages and disadvantages. One of the applicant's research findings is a modified pigment obtained by coating the pigment surface with aluminum hydroxide followed by further coating with an amino acid (disodium stearoyl glutamate) (related technical solution of Chinese patent application CN120514630A). This achieves long-term stable dispersion of the pigment in a liquid system, reduces precipitation caused by particle agglomeration, and enhances the adhesion and durability of the pigment on the skin surface. However, the amount of modified pigment added in this technical solution is less than 20%, and the applicant has found that when the amount added exceeds 20%, it leads to poor spreadability of the pigment, poor anti-dulling properties of the foundation, and poor stability. In view of this, this invention is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a modified color powder, its preparation method, and its application in liquid foundation, so as to solve the technical problems mentioned in the background art.

[0005] The technical solution to achieve the objective of this invention is:

[0006] In a first aspect, the present invention provides a modified color powder, wherein the modified color powder is obtained by grinding and compounding modified inorganic color powder and mica powder; wherein the modified inorganic color powder is obtained by sequentially modifying inorganic color powder with modifier A and modifier B;

[0007] The modifier A is sodium stearoyl glutamate and / or disodium stearoyl glutamate;

[0008] The modifier B is low-erucic acid rapeseed oil and diisostearyl malate.

[0009] To improve the coverage of foundation, the amount of pigment used needs to be increased. However, if the pigment used in a high amount has poor dispersibility in the oil phase, it will result in poor color development and the prepared foundation will be prone to darkening. In addition, the foundation is also prone to sedimentation or stratification during storage. The modified pigments researched by the applicant in the previous study were used in foundation at a rate of less than 20%. When the amount used is higher than 20%, it will lead to poor spreadability of pigments, poor anti-darkening properties of foundation and poor stability.

[0010] To address the aforementioned technical issues, the applicant modified the inorganic pigments and then ground and compounded them with mica powder. During the grinding and compounding process, the modified inorganic pigments were loaded onto the mica powder, which not only brightened the base makeup and reduced dullness, but also provided support in the system through the flake-like structure of the mica powder, preventing direct contact between the inorganic pigments and preventing agglomeration and sedimentation. This, in turn, improved the color development of the modified pigments and the storage stability of the foundation.

[0011] In the process of modifying inorganic pigments, modifier A (sodium stearoyl glutamate and / or disodium stearoyl glutamate) is first used to modify the inorganic pigments, so that they are coated on the surface of the inorganic pigments and the surface energy of the pigments is reduced. However, the applicant found that the modified pigments prepared by directly grinding and compounding them with mica powder did not have good effects on improving the spreadability, anti-dulling properties and stability of the foundation liquid. In order to further solve this technical problem, the applicant first further modified the inorganic pigments modified by modifier A with modifier B (low erucic acid rapeseed oil and diisostearyl malate), and then used modifier C (triisostearic acid isopropoxytitanium salt and triethyl... Modification of synthetic mica powder with triethoxyoctylsilane: Low-erucic acid rapeseed oil and diisostearyl malate have similar structures and polarities to the oil phase matrix of foundation liquid, improving the compatibility of pigments with the oil phase, avoiding agglomeration, and further improving the color development of modified pigments, the anti-dulling properties of foundation liquid, and stability. At the same time, inorganic pigments modified by modifier B are more likely to form a stable composite structure when compounded with modified mica powder, further improving the anti-dulling properties and stability of foundation liquid. Triisostearyl isopropoxytitanium salt and triethoxyoctylsilane impart oil dispersibility to mica powder, avoiding agglomeration of mica powder and preventing precipitation or stratification of foundation liquid.

[0012] Furthermore, the mass ratio of the modified inorganic pigment to the mica powder is 40-60:10-20.

[0013] Furthermore, the inorganic pigment includes at least one of titanium dioxide, iron oxide red, iron oxide yellow, and iron oxide black.

[0014] Furthermore, the particle size of the inorganic pigment is 200-800 nm.

[0015] Furthermore, when the modifier A is sodium stearoyl glutamate and disodium stearoyl glutamate, the mass ratio of sodium stearoyl glutamate to disodium stearoyl glutamate is 1-3:1-3.

[0016] Furthermore, the mass ratio of the low-erucic acid rapeseed oil to diisostearyl malate is 1:3-7.

[0017] Furthermore, the mass ratio of modifier A, modifier B, and inorganic pigment is 1.5-2.5:0.1-0.3:100.

[0018] Furthermore, the preparation method of the modified inorganic pigment includes the following steps:

[0019] Mix the aqueous solution of modifier A with the inorganic color powder, adjust the pH and perform the first stirring modification. After the first stirring modification is completed, dry the mixture to obtain the inorganic color powder modified by modifier A. Mix the inorganic color powder modified by modifier A with modifier B and perform the second stirring modification to obtain the final product.

[0020] Furthermore, the mass concentration of the aqueous solution of the modifier A is 5-10%.

[0021] Furthermore, the pH adjustment is performed by using dilute hydrochloric acid to adjust the pH to 5-6.

[0022] Furthermore, the stirring speed for the first stirring modification is 100-300 rpm.

[0023] Furthermore, the temperature for the first stirring modification is 50-70℃.

[0024] Furthermore, the time for the first stirring modification is 20-40 minutes.

[0025] Furthermore, the stirring speed for the second stirring modification is 100-300 rpm.

[0026] Furthermore, the temperature for the second stirring modification is 100-120℃.

[0027] Furthermore, the second stirring modification time is 20-40 minutes.

[0028] Furthermore, the mica powder is synthetic mica powder modified by modifier C.

[0029] Furthermore, the modifier C is triisostearate isopropoxytitanium salt and triethoxyoctylsilane.

[0030] Furthermore, the mass ratio of the triisostearic acid isopropoxytitanium salt to triethoxyoctylsilane is 0.7-0.8:0.2-0.3.

[0031] Furthermore, the particle size of the synthesized mica powder is 5-30µm.

[0032] Furthermore, the preparation method of the synthetic mica powder modified by the modifier C includes the following steps: mixing the modifier C and ethanol, adding the synthetic mica powder under stirring conditions, continuing to stir at 50-70℃ for 2-4 hours, and then drying to obtain the final product.

[0033] Furthermore, the mass ratio of the modifier C, synthetic mica powder, and ethanol is 1:10-20:10-20.

[0034] Secondly, the present invention provides a method for preparing modified pigment, comprising the following steps: mixing modified inorganic pigment and mica powder, and then grinding and compounding them to obtain the final product.

[0035] Furthermore, the grinding media of the grinding composite is zirconia beads.

[0036] Furthermore, the zirconium oxide beads have a particle size of 2-4 mm.

[0037] Furthermore, the grinding and compounding time is 10-30 minutes.

[0038] Thirdly, the present invention provides an application of modified color powder in liquid foundation.

[0039] Furthermore, the modified color powder is used in the foundation liquid at an amount of 30-35%.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] (1) In this invention, inorganic pigments are modified by modifier A (sodium stearoyl glutamate and / or disodium stearoyl glutamate) and modifier B (low erucic acid rapeseed oil and diisostearyl malate), and then ground and compounded with mica powder modified by modifier C (triisostearyl isopropoxytitanium salt and triethoxyoctylsilane). The resulting modified pigments have excellent acid and alkali resistance and excellent spreadability even at high usage. The prepared foundation liquid has excellent anti-dulling and stability.

[0042] (2) When the modified color powder of the present invention is added to the foundation liquid at a rate of 30%, the foundation liquid obtained does not show any layering or sedimentation after being stored in an oven at 45°C for 30 days; the color difference ΔE after 8 hours is less than 2. Attached Figure Description

[0043] Figure 1 The image shows the dispersion effect of the modified color powder in different oils in Example 1.

[0044] Figure 2 The images show the stability of the modified color powder from Example 1 at different pH values.

[0045] Figure 3 The images show the actual products of the foundation liquids prepared for Application Examples 1, 2, 3, 5, and 6 after storage. Detailed Implementation

[0046] To better understand the above technical solution, the following will provide a detailed explanation of the technical solution in conjunction with specific implementation methods.

[0047] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0048] Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. The following embodiments are only used to more clearly illustrate the technical solutions of this invention, and should not be used to limit the scope of protection of this invention.

[0049] Example 1: A modified color powder: Modified inorganic color powder and mica powder are mixed at a mass ratio of 50:15, and then ground and compounded using 3mm zirconia beads as the grinding medium for 20 minutes to obtain the product.

[0050] The modified inorganic color powder is obtained by sequentially modifying inorganic color powder with modifier A and modifier B. The preparation method includes the following steps:

[0051] An aqueous solution of modifier A and an inorganic color powder were mixed, and the pH was adjusted to 6 with dilute hydrochloric acid. The mixture was stirred for 30 minutes at 200 rpm at 60°C. After the first stirring modification, the mixture was dried to obtain the inorganic color powder modified by modifier A. The inorganic color powder modified by modifier A was then mixed with modifier B and stirred for 30 minutes at 200 rpm at 110°C to obtain the final product.

[0052] Modifier A is sodium stearoyl glutamate (CAS No.: 38517-23-6), and the aqueous solution of modifier A has a mass concentration of 8%.

[0053] The modifier B is low erucic acid rapeseed oil (trade name: Lipex PreAct, available for reference source: Shanghai Qianfei Chemical Co., Ltd.) and diisostearyl malate (CAS No.: 67763-18-2) in a mass ratio of 1:5.

[0054] The inorganic pigment is iron oxide red with a particle size of 500 nm.

[0055] The mass ratio of modifier A, modifier B and inorganic pigment is 2:0.2:100.

[0056] The mica powder is synthetic mica powder modified by modifier C. The preparation method includes the following steps: mixing modifier C and ethanol, adding synthetic mica powder under stirring conditions, continuing to stir at 60°C for 3 hours, and then drying to obtain the final product.

[0057] The modifier C is a mixture of triisostearate isopropoxytitanium salt (CAS: 61417-49-0) and triethoxyoctylsilane (CAS: 2943-75-1) in a ratio of 0.8:0.2.

[0058] The mass ratio of the modifier C, synthetic mica powder, and ethanol is 1:20:20.

[0059] The particle size of the synthetic mica powder is 5-15µm. For reference, please refer to Anhui Gree New Material Technology Co., Ltd., model: SM-515.

[0060] Example 2: A modified color powder:

[0061] The only difference from Example 1 is that iron oxide red is replaced with iron oxide black; everything else is the same.

[0062] Example 3: A modified color powder:

[0063] The only difference from Example 1 is that iron oxide red is replaced with iron oxide yellow; everything else is the same.

[0064] Example 4: A modified color powder:

[0065] The only difference from Example 1 is that iron oxide red is replaced with titanium dioxide; everything else is the same.

[0066] Example 5: A modified color powder:

[0067] The only difference from Example 1 is that the mass ratio of the modified inorganic pigment to the mica powder is 40:10; all other aspects are the same.

[0068] Example 6: A modified color powder:

[0069] The only difference from Example 1 is that the mass ratio of the modified inorganic pigment to the mica powder is 60:20; all other aspects are the same.

[0070] Comparative Example 1: A modified colorant:

[0071] The only difference from Example 1 is that the modified inorganic color powder is obtained by sequentially modifying inorganic color powder with modifier A and modifier B. The preparation method includes the following steps: mixing an aqueous solution of modifier A with inorganic color powder, adjusting the pH to 5.5 with dilute acid, and performing a first stirring modification at 200 rpm for 30 min at 60°C to obtain inorganic color powder modified with modifier A; mixing an aqueous solution of modifier B with inorganic color powder modified with modifier A, adjusting the pH to 6 with dilute hydrochloric acid, and performing a second stirring modification at 200 rpm for 30 min at 60°C to obtain the final product.

[0072] Modifier A is sodium aluminate, and the mass concentration of the aqueous solution of modifier A is 1%.

[0073] Modifier B is sodium stearoyl glutamate (CAS No.: 38517-23-6), and the aqueous solution of modifier B has a mass concentration of 8%.

[0074] The mass ratio of modifier A, modifier B and inorganic pigment is 1.5:2:100; all other components are the same.

[0075] Comparative Example 2: A modified colorant:

[0076] The only difference from Example 1 is that the modifier B is triethoxyoctylsilane; all other aspects are the same.

[0077] Comparative Example 3: A modified colorant:

[0078] The only difference from Example 1 is that the modifier B is triethoxyoctylsilane and diisostearyl malate in a mass ratio of 1:5; all other aspects are the same.

[0079] Comparative Example 4: A modified colorant:

[0080] The only difference from Example 1 is that the modifier B is low-erucic acid rapeseed oil; all other aspects are the same.

[0081] Comparative Example 5: A modified colorant:

[0082] The only difference from Example 1 is that the mica powder is a synthetic mica powder modified with triisostearic acid isopropoxytitanium salt, and the mass ratio of triisostearic acid isopropoxytitanium salt, synthetic mica powder and ethanol is 1:20:20; all other aspects are the same.

[0083] Comparative Example 6: A modified color powder:

[0084] The only difference from Example 1 is that the modifier C is triisostearic acid isopropoxytitanium salt and polydimethylsiloxane in a mass ratio of 0.8:0.2; the preparation method of the synthetic mica powder modified by the modifier C includes the following steps: mixing triisostearic acid isopropoxytitanium salt and ethanol, adding synthetic mica powder under stirring, continuing to stir at 60°C for 1.5 h and drying, adding polydimethylsiloxane and continuing to stir for 1.5 h, and drying to obtain the final product.

[0085] The mass ratio of the modifier C, synthetic mica powder, and ethanol is 1:20:20.

[0086] The polydimethylsiloxane has a kinematic viscosity of 350 cst at 25°C; all other properties are the same.

[0087] Comparative Example 7: A modified colorant:

[0088] The only difference from Example 4 is that the modified inorganic color powder is obtained by sequentially modifying inorganic color powder with modifier A and modifier B. The preparation method includes the following steps: mixing an aqueous solution of modifier A with inorganic color powder, adjusting the pH to 5.5 with dilute acid, and performing a first stirring modification at 200 rpm for 30 min at 60°C to obtain inorganic color powder modified with modifier A; mixing an aqueous solution of modifier B with inorganic color powder modified with modifier A, adjusting the pH to 6 with dilute hydrochloric acid, and performing a second stirring modification at 200 rpm for 30 min at 60°C to obtain the final product.

[0089] Modifier A is sodium aluminate, and the mass concentration of the aqueous solution of modifier A is 1%.

[0090] Modifier B is sodium stearoyl glutamate (CAS No.: 38517-23-6), and the aqueous solution of modifier B has a mass concentration of 8%.

[0091] The mass ratio of modifier A, modifier B and inorganic pigment is 1.5:2:100; all other components are the same.

[0092] Comparative Example 8: A modified colorant:

[0093] The only difference from Example 4 is that the modifier B is triethoxyoctylsilane; all other aspects are the same.

[0094] Comparative Example 9: A modified colorant:

[0095] The only difference from Example 4 is that the modifier B is triethoxyoctylsilane and diisostearyl malate in a mass ratio of 1:5; all other aspects are the same.

[0096] Comparative Example 10: A modified pigment:

[0097] The only difference from Example 4 is that the modifier B is low-erucic acid rapeseed oil; all other aspects are the same.

[0098] Comparative Example 11: A modified pigment:

[0099] The only difference from Example 4 is that the mica powder is a synthetic mica powder modified with triisostearic acid isopropoxytitanium salt, and the mass ratio of triisostearic acid isopropoxytitanium salt, synthetic mica powder and ethanol is 1:20:20; all other aspects are the same.

[0100] Comparative Example 12: A modified colorant:

[0101] The only difference from Example 4 is that the modifier C is triisostearic acid isopropoxytitanium salt and polydimethylsiloxane in a mass ratio of 0.8:0.2; the preparation method of the synthetic mica powder modified by the modifier C includes the following steps: mixing triisostearic acid isopropoxytitanium salt and ethanol, adding synthetic mica powder under stirring, continuing to stir at 60°C for 1.5 h and drying, adding polydimethylsiloxane and continuing to stir for 1.5 h, and drying to obtain the final product.

[0102] The mass ratio of the modifier C, synthetic mica powder, and ethanol is 1:20:20.

[0103] The polydimethylsiloxane has a kinematic viscosity of 350 cst at 25°C; all other properties are the same.

[0104] Color rendering effect test:

[0105] (1) Color development performance test of the modified color powders of Examples 1-6 and Comparative Examples 1-6: The modified color powders of Examples 1-6 and Comparative Examples 1-6 were uniformly dispersed in silicone oil with a viscosity of 350cps (modified color powder content 30%). The L value was tested by a spectrophotometer to evaluate the color development performance. The larger the L value, the higher the brightness, indicating that the color development effect is better. The results are shown in Table 1 below.

[0106] Table 1

[0107]

[0108] As can be seen from Table 1, the modified color powders prepared in Examples 1-6 of this invention still have excellent color development effects when the content is 30%. However, Comparative Example 1 is a result of previous research of this invention, and its color development performance is not as good as that of this invention. The color development performance of the modified color powders in Comparative Examples 2-4 decreased due to changes in the modifier of the inorganic color powder, and the color development performance of the modified color powders in Comparative Examples 5-6 decreased due to changes in the modifier of the synthetic mica powder. This indicates that the modified inorganic color powder of this invention and the synthetic mica powder modified by modifier C have synergistic color development performance.

[0109] (2) The modified pigment from Example 1, domestic competitors, and international competitors were added to octyl dodecanol, ethylhexyl palmitate, isopropyl myristate, and 50 cps viscosity silicone oil (30% modified pigment content), respectively. After shearing and stirring for 10 minutes, the dispersion effect was observed. The results are as follows: Figure 1 As shown.

[0110] Depend on Figure 1 It can be seen that the modified color powder of Example 1 of the present invention has good dispersion effect in 30% of the dodecanol, ethylhexyl palmitate, isopropyl myristate and 50 viscosity silicone oil, which is significantly better than domestic and international competing products.

[0111] (3) The modified pigment from Example 1 and the domestic competitor were added to water (5% modified pigment content) at pH 2, pH 6 and pH 13 respectively, and left to stand for 72 hours. The results are as follows. Figure 2 As shown: The modified color powder of Example 1 can exist stably under acidic, neutral and alkaline conditions, while domestic competing products have shown agglomeration and sedimentation.

[0112] Application Example 1

[0113] The foundation liquid was prepared using the modified color powder from Example 1 and the modified color powder from Example 4, and the formula is as follows:

[0114] The raw material components were weighed and mixed as follows: 2.5g modified color powder from Example 1, 27.5g modified color powder from Example 4, 45g water, 4g glycerin, 2.5g propylene glycol, 0.8g sodium chloride, 6g chamomile essential oil polymer micelles (source: self-made by the company, preparation method is the technical solution of Example 1 of Chinese Patent Publication No. CN120514630A of the applicant), 1.7g poloxamer 407, 0.24g poloxamer 188, 9g... g decanoic acid triglyceride, 0.8 g cetyl polyethylene glycol; the preparation method is as follows: water, glycerin, propylene glycol, decanoic acid triglyceride, and cetyl polyethylene glycol are mixed and dispersed evenly, then modified color powder is added and dispersed evenly to obtain mixture A; under ice bath conditions, chamomile essential oil polymer micelles are added to binder and stirred evenly, and then refrigerated at 4℃ for later use to obtain mixture B; mixture A and mixture B are mixed and ultrasonically vibrated for 60 min under ice bath conditions to obtain foundation liquid.

[0115] Application Example 2

[0116] The only difference from Application Example 1 is that the modified color powder of Example 1 is replaced with the same mass of the modified color powder of Comparative Example 1, and the modified color powder of Example 4 is replaced with the same mass of the modified color powder of Comparative Example 7; all other aspects are the same.

[0117] Application Example 3

[0118] The only difference from Application Example 1 is that the modified color powder of Example 1 is replaced with the same mass of the modified color powder of Comparative Example 2, and the modified color powder of Example 4 is replaced with the same mass of the modified color powder of Comparative Example 8; all other aspects are the same.

[0119] Application Example 4

[0120] The only difference from Application Example 1 is that the modified color powder of Example 1 is replaced with the same mass of the modified color powder of Comparative Example 3, and the modified color powder of Example 4 is replaced with the same mass of the modified color powder of Comparative Example 9; all other aspects are the same.

[0121] Application Example 5

[0122] The only difference from Application Example 1 is that the modified color powder of Example 1 is replaced with the same mass of the modified color powder of Comparative Example 4, and the modified color powder of Example 4 is replaced with the same mass of the modified color powder of Comparative Example 10; all other aspects are the same.

[0123] Application Example 6

[0124] The only difference from Application Example 1 is that the modified color powder of Example 1 is replaced with the same mass of the modified color powder of Comparative Example 5, and the modified color powder of Example 4 is replaced with the same mass of the modified color powder of Comparative Example 11; all other aspects are the same.

[0125] Application Example 7

[0126] The only difference from Application Example 1 is that the modified color powder of Example 1 is replaced with the same mass of the modified color powder of Comparative Example 6, and the modified color powder of Example 4 is replaced with the same mass of the modified color powder of Comparative Example 12; all other aspects are the same.

[0127] The resulting foundation liquid underwent the following performance tests:

[0128] (1) Stability: After storing the foundation liquid in a 45℃ oven for 30 days, observe whether stratification or sedimentation occurs. The results are shown in Table 2 below. Figure 3 As shown.

[0129] (2) Anti-dullness: Apply the foundation evenly to a 2cm×2cm acrylic plate at 36℃ (the amount is 2mg / cm). 2 The values ​​of L0, a0, and b0 are measured using a spectrophotometer within 2 minutes. The values ​​of L, a, and b are measured again after 8 hours. The color difference ΔE is calculated using the formula: ΔE = [(L0 - L0)] 2 +(a0-a) 2 +(b0-b) 2 )] 1 / 2 The smaller the value of △E, the better the resistance to dulling, as shown in Table 2 below.

[0130] Table 2

[0131]

[0132] As can be seen from Table 2, the foundation liquid prepared using the modified color powders of Examples 1 and 4 of the present invention did not show any stratification or sedimentation after being stored in an oven at 45°C for 30 days, indicating good stability. The color difference value was less than 2 after 8 hours, indicating good resistance to darkening.

[0133] In Application Example 2, the modified color powder based on the previous research results of this invention was used to prepare a liquid foundation that exhibited stratification, with a color difference value greater than 2, and its anti-dulling properties were not as good as those of this invention. In Application Example 3, the modifier B was triethoxyoctylsilane, and the liquid foundation prepared exhibited stratification, with a large color difference value after 8 hours and poor anti-dulling properties.

[0134] In Application Example 4, the modifier B was triethoxyoctylsilane and diisostearyl malate in a mass ratio of 1:5. Although the prepared foundation liquid did not show any layering or sedimentation, the color difference value was large after 8 hours, and the anti-dulling property was poor.

[0135] In Application Example 5, the modifier was low-erucic acid rapeseed oil. The prepared foundation liquid showed stratification, and the color difference value was large after 8 hours, with poor anti-dulling properties.

[0136] The mica powder used in Application Example 6 was a synthetic mica powder modified with triisostearate isopropoxytitanium salt. The prepared foundation liquid showed stratification, and the color difference value was large after 8 hours, with poor anti-dulling properties.

[0137] In Application Example 7, the mica powder was a synthetic mica powder modified with triisostearate isopropoxytitanium salt and polydimethylsiloxane. Although the prepared foundation liquid did not show any stratification or sedimentation, the color difference value was large after 8 hours, and the anti-dulling property was poor.

[0138] As can be seen from the comparison of Application Examples 1-7, the foundation liquid prepared using the modified color powder of the present invention still has excellent stability and anti-dulling properties even at high content.

[0139] 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 modified pigment, characterized in that, The modified color powder is obtained by grinding and compounding modified inorganic color powder and mica powder; the modified inorganic color powder is obtained by sequentially modifying inorganic color powder with modifier A and modifier B; The modifier A is sodium stearoyl glutamate and / or disodium stearoyl glutamate; The modifier B is low-erucic acid rapeseed oil and diisostearyl malate; The mica powder is a synthetic mica powder modified by modifier C; the modifier C is triisostearic acid isopropoxytitanium salt and triethoxyoctylsilane.

2. The modified color powder according to claim 1, characterized in that, The mass ratio of the modified inorganic pigment to the mica powder is 40-60:10-20; the inorganic pigment includes at least one of titanium dioxide, iron oxide red, iron oxide yellow, and iron oxide black.

3. The modified color powder according to claim 2, characterized in that, The mass ratio of modifier A, modifier B and inorganic pigment is 1.5-2.5:0.1-0.3:

100.

4. The modified color powder according to claim 3, characterized in that, The preparation method of the modified inorganic pigment includes the following steps: Mix the aqueous solution of modifier A with the inorganic color powder, adjust the pH and perform the first stirring modification. After the first stirring modification is completed, dry the mixture to obtain the inorganic color powder modified by modifier A. Mix the inorganic color powder modified by modifier A with modifier B and perform the second stirring modification to obtain the final product.

5. The modified color powder according to claim 4, characterized in that, The stirring speed for the first stirring modification is 100-300 rpm; the temperature for the first stirring modification is 50-70℃; and the time for the first stirring modification is 20-40 min. The stirring speed for the second stirring modification is 100-300 rpm; the temperature for the second stirring modification is 100-120℃; and the time for the second stirring modification is 20-40 min.

6. The modified color powder according to claim 5, characterized in that, The preparation method of the synthetic mica powder modified by the modifier C includes the following steps: mixing the modifier C and ethanol, adding the synthetic mica powder under stirring, continuing to stir at 50-70℃ for 2-4 hours, and then drying to obtain the final product.

7. The modified color powder according to claim 6, characterized in that, The mass ratio of the triisostearic acid isopropoxytitanium salt to triethoxyoctylsilane is 0.7-0.8:0.2-0.3; the mass ratio of the modifier C, synthetic mica powder and ethanol is 1:10-20:10-20.

8. The method for preparing the modified pigment according to any one of claims 1-7, characterized in that, Includes the following steps: The modified inorganic color powder and mica powder are mixed, ground, and compounded to obtain the final product.

Images