HYDROPHOBIC AND LIPOPHOBIC COSMETIC PIGMENT POWDER WITH EXCELLENT SKIN-FITTING PROPERTY AS WELL AS PREPARATION METHOD AND APPLICATION THEREOF

Abstract

The present invention discloses a hydrophobic and lipophobic cosmetic pigment powder, including pigment powder and a skin-fitting treatment agent. The skin-fitting treatment agent can perform surface compounding treatment on the pigment powder and includes fluorine-containing silane and hydrogenated lecithin. The hydrophobic and lipophobic cosmetic pigment powder has excellent hydrophobic and lipophobic properties, has excellent pickable property and skin-fitting property, and makes skin elastic, soft and smooth. The perfluorinated silane treatment agent in the present invention has a carbon number less than or equal to 8, is safe, skin-friendly and nontoxic, and can achieve effects of nourishing skin and easily removing makeup due to addition of pure plant ingredients with excellent skin affinity.

Claims

1. A hydrophobic and lipophobic cosmetic pigment powder, comprising a pigment powder and a skin-fitting treatment agent, wherein the skin-fitting treatment agent performs surface compounding treatment on the pigment powder and comprises fluorine-containing silane and hydrogenated lecithin.

2. The hydrophobic and lipophobic cosmetic pigment powder according to claim 1, wherein the fluorine-containing silane and the hydrogenated lecithin in the skin-fitting treatment agent are used together according to a weight ratio of 1:1-15:1.

3. The hydrophobic and lipophobic cosmetic pigment powder according to claim 1, wherein the hydrophobic and lipophobic cosmetic pigment powder comprises 0.1-10.0% of the fluorine-containing silane, 0.1-10.0% of the hydrogenated lecithin, and the balance of pigment powder in percentage by weight.

4. The hydrophobic and lipophobic cosmetic pigment powder according to claim 1, wherein the pigment powder includes but not limited to one or a mixture of more of titanium dioxide, iron oxide yellow, iron oxide red, iron oxide black, talc, mica, ultramarines and chromium oxide green.

5. The hydrophobic and lipophobic cosmetic pigment powder according to claim 1, wherein a structure of the fluorine-containing silane is , wherein Rf is CnF2n+1, n is more than or equal to 1 and less than or equal to 6, n is an integer, and m is .1 or 2.

6. The hydrophobic and lipophobic cosmetic pigment powder according to claim 1, wherein the fluorine-containing silane is perfluorooctyl triethoxysilane.

7. The hydrophobic and lipophobic cosmetic pigment powder according to claim 1, wherein the hydrophobic and lipophobic cosmetic pigment powder is composed of the following substances in percentage by weight: 99.64% of talcum powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; 0.24% of iron oxide yellow treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; 0.10% of iron oxide red treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; and 0.02% of iron oxide black treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; or 53.25% of talcum powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; 41.32% of mica powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; 2.36% of titanium dioxide treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; 0.71% of iron oxide yellow treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; and 2.36% of iron oxide red treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; or 91.8% of titanium dioxide treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; 5.4% of iron oxide yellow treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; 1.8% of iron oxide red treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin; and 1.0% of iron oxide black treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin.

8. An application of the hydrophobic and lipophobic cosmetic pigment powder of claim 1 in cosmetics.

9. A preparation method of the hydrophobic and lipophobic cosmetic pigment powder according to claim 1, comprising the following steps: step (1), preparing a skin-fitting treatment solution: dissolving the fluorine-containing silane and the hydrogenated lecithin in ethanol or polyhydric alcohols to prepare the treatment solution; step (2), spraying the treatment solution onto a surface of the pigment powder while stirring at high speed, uniformly mixing and discharging, heating and drying; and step (3), performing air jet milling to obtain the powder.

10. The preparation method of the hydrophobic and lipophobic cosmetic pigment powder according to claim 9, wherein the preparation method comprises the following steps: step (1), preparing a skin-filling treatment solution: dissolving the fluorine-containing silane and the hydrogenated lecithin in ethanol or polyhydric alcohols with an amount of 1-1.5 times while stirring at a high speed of 2000-20000 revolutions per minute to prepare a treatment solution; step (2), spraying the treatment solution onto a surface of the pigment powder while stirring at the high speed of 2000-20000 revolutions per minute, uniformly mixing and discharging, heating at 100-150 C. and drying for 1-5 hours; and step (3), performing air jet milling: treating the powder by adopting high-pressure air of 7-8 Mpa, thereby obtaining the powder with a mean particle size of 0.1-5 m.

Description

DESCRIPTION OF THE DRAWINGS

[0050] FIG. 1 is a contact angle test picture of titanium dioxide treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin;

[0051] FIG. 2 is a contact angle test picture of iron oxide yellow powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin;

[0052] FIG. 3 is a contact angle test picture of iron oxide black powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin;

[0053] FIG. 4 is a contact angle test picture of iron oxide red powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin;

[0054] FIG. 5 is a contact angle test picture of talcum powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin;

[0055] FIG. 6 is a contact angle test picture of mica powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin;

[0056] FIG. 7 is a contact angle test picture of titanium dioxide treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin;

[0057] FIG. 8 is a contact angle test picture of iron oxide yellow powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin;

[0058] FIG. 9 is a contact angle test picture of iron oxide black powder treated by 6% of perfluorooctyl triethoxysilane;

[0059] FIG. 10 is a contact angle test picture of iron oxide red powder treated by 6% of perfluorooctyl triethoxysilane;

[0060] FIG. 11 is a contact angle test picture of talcum powder treated by 6% of perfluorooctyl triethoxysilane; and

[0061] FIG. 12 is a contact angle test picture of mica powder treated by 6% of perfluorooctyl triethoxysilane.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0062] Specific embodiments of the present invention are described in detail below in combination with drawings. However, it should be understood that, a protection scope of the present invention is not limited by specific embodiments.

[0063] Unless otherwise expressly stated, in the whole description and claims, a term include or transformations thereof, such as contain or including and the like, should be understood to include the stated elements or components, rather than excluding other elements or other components.

Embodiment 1

[0064] steps: dissolving 60 g of perfluorooctyl triethoxysilane (Dynasylan F8261, Evonik Degussa) and 20 g of hydrogenated lecithin (LECIPLART-SOY.Math.75H, TECHNOBLE) in 100 g of ethanol to prepare a treatment solution; spraying the treatment solution into 1 kg of titanium dioxide while high-speed stirring, fully mixing the treatment solution and powder and then discharging, and drying at 110 C. for 3 h; and performing air jet milling after discharging, thereby obtaining the titanium dioxide subjected to compounding treatment.

Embodiment 2

[0065] steps: dissolving 60 g of perfluorooctyl triethoxysilane (Dynasylan F8261, Evonik Degussa) and 20 g of hydrogenated lecithin (LECIPLART-SOY.Math.75H, TECHNOBLE) in 100 g of ethanol to prepare a treatment solution; spraying the treatment solution into 1 kg of iron oxide yellow while high-speed stirring, fully mixing the treatment solution and powder and then discharging, and drying at 110 C. for 3 h; and performing air jet milling after discharging, thereby obtaining the iron oxide yellow subjected to compounding treatment.

Embodiment 3

[0066] steps: dissolving 60 g of perfluorooctyl triethoxysilane (Dynasylan F8261, Evonik Degussa) and 20 g of hydrogenated lecithin (LECIPLART-SOY.Math.75H, TECHNOBLE) in 100 g of ethanol to prepare a treatment solution; spraying the treatment solution into 1 kg of iron oxide red while high-speed stirring, fully mixing the treatment solution and powder and then discharging, and drying at 110 C. for 3 h; and performing air jet milling after discharging, thereby obtaining the iron oxide red subjected to compounding treatment.

Embodiment 4

[0067] steps: dissolving 60 g of perfluorooctyl triethoxysilane (Dynasylan F8261, Evonik Degussa) and 20 g of hydrogenated lecithin (LECIPLART-SOY.Math.75H, TECHNOBLE) in 100 g of ethanol to prepare a treatment solution; spraying the treatment solution into 1 kg of iron oxide black while high-speed stirring, fully mixing the treatment solution and powder and then discharging, and drying at 110 C. for 3 h; and performing air jet milling after discharging, thereby obtaining the iron oxide black subjected to compounding treatment.

Embodiment 5

[0068] steps: dissolving 60 g of perfluorooctyl triethoxysilane (Dynasylan F8261, Evonik Degussa) and 20 g of hydrogenated lecithin (LECIPLART-SOY.Math.75H, TECHNOBLE) in 100 g of ethanol to prepare a treatment solution; spraying the treatment solution into 1 kg of talcum powder while high-speed stirring, fully mixing the treatment solution and powder and then discharging, and drying at 110 C. for 3 h; and performing air jet milling after discharging, thereby obtaining the talcum powder subjected to compounding treatment.

Embodiment 6

[0069] steps: dissolving 60 g of perfluorooctyl triethoxysilane (Dynasylan F8261, Evonik Degussa) and 20 g of hydrogenated lecithin (LECIPLART-SOY.Math.75H, TECHNOBLE) in 100 g of ethanol to prepare a treatment solution; spraying the treatment solution into 1 kg of sericite while high-speed stirring, fully mixing the treatment solution and powder and then discharging, and drying at 110 C. for 3 h; and performing air jet milling after discharging, thereby obtaining the sericite subjected to compounding treatment.

Embodiment 7 (Loose Powder and Pressed Powder)

[0070] The powder prepared in embodiments 2, 3, 4 and 5 is added into a formula shown in Table 1 to prepare the loose powder or pressed powder.

TABLE-US-00001 TABLE 1 Formula composition of loose powder Phase Component name Mass percentage % Producer/supplier A Boron nitride 3.00 Combined micro powder Talcum powder treated by 6% of 82.30 Self-produced perfluorooctyl triethoxysilane + 2% of hydrogenated lecithin (embodiment 5) Iron oxide yellow treated by 6% of 0.20 Self-produced perfluorooctyl triethoxysilane + 2% of hydrogenated lecithin (embodiment 2) Iron oxide red treated by 6% of perfluorooctyl 0.08 Self-produced triethoxysilane + 2% of hydrogenated lecithin (embodiment 3) Iron oxide black treated by 6% of 0.02 Self-produced perfluorooctyl triethoxysilane + 2% of hydrogenated lecithin (embodiment 4) Nylon 12 9.80 Combined micro powder B PMX-0345 Fluid 2.00 Dow Corning PMX-200 Fluid, 5 cst 2.00 Dow Corning C Euxyl PE 9010 0.60 Schulke&Mayr

[0071] 2. Preparation Process

[0072] steps: sequentially adding raw materials in phase A into a stirrer, and stirring and mixing at a high speed for 1 minute to uniformly mix different powders;

[0073] sequentially adding raw materials in phase B and C into an oil injection apparatus of the stirrer, and stirring and mixing at a high speed for 1 minute while injecting oil to fully and uniformly mix all the raw materials, and discharging.

[0074] Thus, the loose powder A is obtained; and if the loose powder is weighed in a pressed powder mold and pressed by a powder presser, a pressed powder can be obtained.

Embodiment 8 (Blusher Preparation)

[0075] The powder prepared in embodiments 1-6 is added into a formula shown in Table 2 to prepare a blusher.

TABLE-US-00002 TABLE 2 Blusher formula Mass Phase Component name percentage % Producer/supplier A Talcum powder treated by 6% of perfluorooctyl 45.10 Self-produced triethoxysilane + 2% of hydrogenated lecithin (embodiment 5) Mica powder treated by 6% of perfluorooctyl 35.00 Self-produced triethoxysilane + 2% of hydrogenated lecithin (embodiment 6) Magnesium stearate 5.00 Combined micro powder D Polysynlane LITE 2.50 NOF PMX-200 Fluid, 100 cst 2.50 Dow Corning Indopol H-300 1.80 INEOS Softisan 649 1.20 Sasol E Euxyl PE 9010 0.60 Schulke&Mayr Vitamin E-Acetate Care 0.20 BASF B Titanium dioxide treated by 6% of perfluorooctyl 2.00 Self-produced triethoxysilane + 2% of hydrogenated lecithin (embodiment 1) Iron oxide yellow treated by 6% of perfluorooctyl 0.60 Self-produced triethoxysilane + 2% of hydrogenated lecithin (embodiment 2) Iron oxide red treated by 6% of perfluorooctyl 2.00 Self-produced triethoxysilane + 2% of hydrogenated lecithin (embodiment 3) Red 6 color lake 0.50 Sun Chemical Red 7 color lake 1.00 Sun Chemical

[0076] 2. Preparation Process

[0077] steps: sequentially adding raw materials in phase A and raw materials in phase E into a stirrer, and stirring and mixing at a high speed for 1 minute;

[0078] adding raw materials in phase B into the stirrer, and stirring at a high speed for 3 minutes for uniformly mixing, thereby obtaining a mixture of the phase A, the phase E and the phase B;

[0079] pre-dissolving the phase D and uniformly stirring, then adding the mixture into an oil injection apparatus of the stirrer, and stirring and mixing at a high speed for 1 minute while injecting oil to fully and uniformly mix all the raw materials, and discharging; and

[0080] pressing the powder in an aluminum disk or a plastic shell, thereby obtaining the blusher.

Embodiment 9

[0081] The powder prepared in embodiments 1, 2, 3 and 4 is added into a formula of the following liquid foundation (cream foundation) shown in Table 3.

TABLE-US-00003 TABLE 3 Formula composition of liquid foundation (cream foundation) Phase Component name Mass percentage % Producer/supplier A Abil EM90 2.00 Evonik KF-6017 1.00 ShinEtsu 556 Cosmetic Grade Fluid 7.50 Dow Corning Silfoft 034 4.00 Momentive 10# white oil 3.00 Hanglian 38V Gel 3.00 Self-prepared PMX-0345 Fluid 3.90 Dow Corning Cetiol SN 1.45 BASF Tegosoft TN 4.35 Evonik Liponate TDTM 0.50 Liponic B 593 Fluid 1.00 Dow Corning C Titanium dioxide treated by 6% of 9.18 Self-produced perfluorooctyl triethoxysilane + 2% of hydrogenated lecithin (embodiment 1) Iron oxide yellow powder treated by 6% 0.54 of perfluorooctyl triethoxysilane + 2% of hydrogenated lecithin (embodiment 2) Iron oxide red powder treated by 6% of 0.18 perfluorooctyl triethoxysilane + 2% of hydrogenated lecithin (embodiment 3) Iron oxide black powder treated by 6% 0.1 of perfluorooctyl triethoxysilane + 2% of hydrogenated lecithin (embodiment 4) D Deionized water To 100 Self-produced 1,3-butanediol 7.00 Sansense Propylene glycol 6.00 Sansense Glycine betaine 2.00 Sansense Magnesium sulfate heptahydrate 1.00 Dicheng E Euxyl PE 9010 0.60 Schulke&Mayr Essence Appropriate Givaudan

[0082] 2. Preparation Process

[0083] steps: preparing 38V Gel: 20% Bentone 38 V(Hemmings)+75%PMX-0345 Fluid+5% 95 alcohol, rapidly and uniformly stirring, and then homogenizing for 5 minutes;

[0084] stirring and heating the phase A to be about 70 C., and homogenizing (at a rate of 10000 revolutions per minute) for 30 seconds after the components are completely dissolved;

[0085] adding the powder in the phase C, homogenizing (at the rate of 10000 revolutions per minute) for 1 minute, and uniformly dispersing the powder;

[0086] adding the phase B into the phases A and C, rapidly stirring the phases A, B and C (at a rate of 400 revolutions per minute), and simultaneously heating the phase D to be about 75-80 C. until the components are completely dissolved;

[0087] maintaining the temperature, increasing the stirring speed (400-500 revolutions per minute) of the phases A, B and C, slowly adding the phase D into the phases A, B and C to fully complete emulsification, and homogenizing (at the rate of 10000 revolutions per minute) for 1 minute; and

[0088] stirring (at a rate of 380-400 revolutions per minute), cooling to a temperature below 45 C., adding the phase E, and uniformly stirring and discharging.

[0089] Test Case 1

[0090] Contrast case 1: steps: dissolving 60 g of perfluorooctyl triethoxysilane (Dynasylan F8261, Evonik Degussa) in 100 g of ethanol to prepare a treatment solution; spraying the treatment solution into 1 kg of titanium dioxide while high-speed stirring, fully mixing the treatment solution and powder and then discharging, and drying at 110 C. for 3 h; and performing air jet milling after discharging, thereby obtaining the titanium dioxide subjected to fluorination treatment.

[0091] Contrast case 2: the titanium dioxide in the contrast case 1 is replaced with iron oxide yellow.

[0092] Contrast case 3: the titanium dioxide in the contrast case 1 is replaced with iron oxide red.

[0093] Contrast case 4: the titanium dioxide in the contrast case 1 is replaced with iron oxide black.

[0094] Contrast case 5: the titanium dioxide in the contrast case 1 is replaced with talcum powder.

[0095] Contrast case 6: the titanium dioxide in the contrast case 1 is replaced with sericite.

[0096] Powder prepared in embodiments 1, 2, 3, 4, 5 and 6 and the contrast cases 1, 2, 3, 4, 5 and 6 is subjected to contact angle test, and test fluid is respectively deionized water and liquid paraffin. Test results are shown in FIG. 1-FIG. 12 (water on the left side, and liquid paraffin on the right side) and Table 4.

TABLE-US-00004 TABLE 4 Contact angle test performed on the powder prepared in embodiments 1, 2, 3 and 4 and contrast cases 1, 2, 3 and 4 Contact Contact angle of angle of water liquid Powder name (embodiment) () paraffin () Titanium dioxide treated by 6% of perfluorooetyl triethoxysilane + 2% of hydrogenated 151 147 lecithin (embodiment 1) Iron oxide yellow powder treated by 6% of perfluorooctyl triethoxysilane + 2% of 139 129 hydrogenated lecithin (embodiment 2) Iron oxide red powder treated by 6% of perfluorooctyl triethoxysilane + 2% of 145 129 hydrogenated lecithin (embodiment 3) Iron oxide black powder treated by 6% of perfluorooctyl triethoxysilane + 2% of 143 135 hydrogenated lecithin (embodiment 4) Talcum powder treated by 6% of perfluorooctyl triethoxysilane + 2% of hydrogenated 150 136 lecithin (embodiment 5) Mica powder treated by 6% of perfluorooctyl triethoxysilane + 2% of hydrogenated lecithin 145 140 (embodiment 6) Titanium dioxide treated by 6% of perfluorooctyl triethoxysilane (contrast case 1) 156 150 Iron oxide yellow powder treated by 6% of perfluorooctyl triethoxysilane (contrast case 2) 140 130 Iron oxide red powder treated by 6% of perfluorooctyl triethoxysilane (contrast case 3) 146 132 Iron oxide black powder treated by 6% of perfluorooctyl triethoxysilane (contrast case 4) 147 140 Talcum powder treated by 6% of perfluorooctyl triethoxysilane (contrast case 6) 155 140 Mica powder treated by 6% of perfluorooctyl triethoxysilane (contrast case 7) 150 148

[0097] Mica powder treated by 6% of perfluorooctyl triethoxysilane (contrast case 7) 150148

[0098] Conclusion: the hydrophobic and oleophilic properties of the powder subjected to the compounding treatment of the hydrogenated lecithin are not decreased, so the powder has excellent make-up retaining property.

[0099] Test Case 2

[0100] The powder treated by 6% of perfluorooctyl triethoxysilane prepared in the contrast cases 2, 3 and 4 replaces the powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin prepared in embodiments 2, 3 and 4 and is added into the formula of the pressed powder (loose powder) shown in Table 2, and sample making is performed according to the same process, thereby obtaining loose powder B.

[0101] A foundation evaluation method: searching several volunteers, respectively applying the foundation A and the foundation B to left and right cheeks, evaluating elasticity, smoothness and application, property during application, and evaluating skin-fitting properties and make-up retaining effects of the two kinds of foundations after application. Contrast results are shown in Table 5.

TABLE-US-00005 TABLE 5 Skin feeling contrast results of the loose powder A and B Evaluation indexes Make-up Easiness retaining degree of Number of loose effect after Skin-fitting Application make-up powder 8 hours property Elasticity Smoothness property removal Loose powder 10 10 10 10 10 9 A(embodiment 7) Loose powder 10 5 6 8 8 5 B(embodiment 7) Note: The full mark is 10.

[0102] Conclusion: the powder treated by 6% of perfluorooctyl triethoxysilane+2% of hydrogenated lecithin in the present invention is better than powder treated without the hydrogenated lecithin in the aspects of skin-fitting property, elasticity, smoothness, application property and easiness degree of make-up removal.

[0103] TEST CASE 3 Type screening test of treatment agent used with perfluorooctyl triethoxysilane

[0104] Amino acid, lecithin and hydrogenated lecithin belong to substances with biocompatibility with skin. Therefore, an appropriate treatment agent is screened from the three types of skin-fitting treatment agents.

[0105] High-purity lecithin has strong oxidation property and is extremely easy to be oxidized, so non-hydrogenated lecithin is generally required to be placed in a nitrogen-filled sealed container and is extremely inconvenient in use.

[0106] The amino acid is generally treated by a wet process. Treatment cost is high, and lots of waste water may be discharged.

[0107] The method includes the steps: dissolving 50 g of lecithin in 100 g of ethanol to prepare a treatment solution; spraying the treatment solution into 1 kg of titanium dioxide while high-speed stirring, fully mixing the treatment solution and powder and then discharging, and drying at 110 C. for 3 h; and performing air jet milling after discharging, thereby obtaining titanium dioxide treated by 5% of lecithin.

[0108] The above lecithin is replaced with the hydrogenated lecithin, and the same process is performed, thereby obtaining titanium dioxide treated by 5% of hydrogenated lecithin.

[0109] The method includes the steps: pre-dispersing 1 kg of titanium dioxide into a 16%-20% of aqueous solution, regulating a pH value of the solution to be about 11 by using sodium hydroxide, and adding 50 g of lauryl lysine powder; raising a temperature of the solution to 80 C., stirring and mixing for 40 minutes, regulating the pH value to be 6 by using hydrochloric acid, maintaining the temperature, stirring to react for 4 minutes, washing, drying and grinding, thereby obtaining the titanium dioxide treated by 5% of amino acid.

[0110] By comparing the skin-fitting properties of the powders obtained by the three treatment methods, it is discovered that, the skin-fitting properties of the powders treated by the lecithin and the hydrogenated lecithin are better than that of the powder treated by the amino acid. However, since the lecithin is extremely easy to be oxidized and is inconvenient in use, the hydrogenated lecithin is selected as the skin-fitting treatment agent.

[0111] TEST CASE 4 Dosage screening test of treatment agent used with perfluorooctyl triethoxysilane

[0112] A treatment ratio of the perfluorooctyl triethoxysilane to the hydrogenated lecithin in the patent is from 1:1 to 15:1, and preferably 3:1. A screening test is as follows:

[0113] fixing a dosage of the perfluorooctyl triethoxysilane according to an experimental process in embodiment 1, and changing a dosage of the hydrogenated lecithin to change a proportional relation between the two treatment agents; and respectively adding 70 g, 60 g, 20 g, 4 g and 3 g of the hydrogenated lecithin, and correspondingly changing the dosage of the ethanol to be 150 g, 130 g, 100 g, 80 g and 80 g, thereby obtaining the titanium dioxide with compounding treatment ratios of 6:7, 1:1, 3:1, 5:1 and 20:1 of the perfluorooctyl triethoxysilane to the hydrogenated lecithin.

[0114] When it is discovered that the dosage of the hydrogenated lecithin is greater than that of the perfluorooctyl triethoxysilane later, i.e., when the treatment ratio is 6:7, the treated powder is poor in lipophobic property (a contact angle of liquid paraffin is less than 90 degrees). When the dosage of the hydrogenated lecithin is too small, i.e., when the compounding treatment ratio of the perfluorooctyl triethoxysilane to the hydrogenated lecithin is above 15:1, the powder loses elastic-smooth feeling and excellent skin-fitting property. Therefore, the treatment ratio of the perfluorooctyl triethoxysilane to the hydrogenated lecithin is selected within a range of 1:1 to 15:1, and in the range, both hydrophobic and lipophobic properties may be ensured, and the elastic-smooth feeling and the skin-fitting property may be also ensured. Further, when the treatment ratio of the perfluorooctyl triethoxysilane to the hydrogenated lecithin is 3:1, the hydrophobic and lipophobic properties and the elastic-smooth feeling are the best.

[0115] The above description of specific exemplary embodiments of the present invention is for the purpose of explaining and illustrating. The description is not intended to limit the present invention to a disclosed precise form, and apparently, many modifications and changes may be made according to the above teaching. A purpose for selecting and describing the exemplary embodiments is to explain a specific principle of the present invention and actual applications thereof. Therefore, those skilled in the art may realize and utilize various exemplary embodiments and various selections and modifications in the present invention. A scope of the present invention is limited by claims and equivalent forms thereof.