JP2005119997A - Pigment powder for cosmetic and cosmetic containing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain pigment powder for a cosmetic, which exhibits excellent water/oil repellency, has excellent dispersibility and dispersion stability and can prepare a cosmetic having excellent water/oil repellency by combining it with an ordinary dispersible oily component without using an expensive fluorine compound-based binder and a cosmetic containing the pigment powder for a cosmetic. <P>SOLUTION: The pigment powder for a cosmetic is obtained by subjecting pigment powder as a raw material to surface treatment simultaneously with a perfluoroalkyl group-containing phosphoric acid ester and an alkoxytitanium alkylate compound. The cosmetic comprises the thus obtained pigment powder for a cosmetic. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cosmetic pigment powder blended in makeup cosmetics such as foundations, eye shadows, cheeks, etc., or sunscreen cosmetics, and a cosmetic containing the cosmetic pigment powder. is there.

  Conventionally, in order to impart water / oil repellency to makeup cosmetics such as foundations, eye shadows, cheeks, etc., or sunscreen cosmetics, the surface of the pigment can be coated with a perfluoroalkyl phosphate compound. (For example, refer to Patent Documents 1 to 3.) However, a cosmetic comprising a combination of a pigment surface-treated with a perfluoroalkyl phosphate compound and a so-called binder such as a commonly used dispersed oil component (aliphatic or silicone), a surfactant, or the like. Then, it was not possible to obtain an excellent dispersion state or a good feel. Therefore, dispersibility and feeling of use are compensated by combining the above-mentioned pigment powder that has been surface-coated with fluorine oils such as perfluoropolyether, perfluorodecalin, and perfluorooctane. (For example, refer to Patent Documents 4 and 5.)

Japanese Patent Publication No. 5-86984 JP-A-3-246210 JP-A-4-33007 JP-A-4-224506 JP-A-5-39209

  However, fluorinated oils such as perfluoropolyether, perfluorodecalin, and perfluorooctane as described above are very expensive, so that their use is limited to specific cosmetics. There is a problem that the feel of the material (particularly the foundation) becomes powdery.

  The present invention has been made in order to solve such problems, and without using an expensive fluorine-based oil agent, a commonly used oil component, a general surfactant and the like are used. The purpose of the present invention is to provide a cosmetic pigment powder that exhibits excellent water and oil repellency, spreads well on the skin, and gives a powder-free cosmetic. The object of the present invention is to provide a cosmetic containing a pigment powder for use.

In order to achieve the above object, a cosmetic pigment powder according to the present invention is applied to a pigment powder as a raw material by the following formula: [RfC _n H _2n O] _y PO (OM) _3-y
(In the formula, Rf represents a perfluoroalkyl group having 3 to 21 carbon atoms or a perfluorooxyalkyl group, which is linear or branched and has a single chain length or a complex chain length. In addition, n represents an integer of 1 to 12, y represents an integer of 1 to 3, and M represents hydrogen, an alkali metal, ammonium, or substituted ammonium.)
And a phosphoric acid ester having a perfluoroalkyl group represented by the following formula: (C _n H _{2n + 1} COO) _a Ti (OC _m H _{2m + 1} ) _b
(In the formula, n represents an integer of 1 to 26, m represents an integer of 1 to 12, a and b are each an integer of 1 to 3, and have a relationship of a + b = 4. The group may be linear or branched and may be single chain length or complex chain length.)
The surface is treated simultaneously with an alkoxytitanium alkylate compound represented by the formula (1st invention).

  A cosmetic according to the second invention is characterized by containing the cosmetic pigment powder according to the first invention.

  According to the present invention, makeup and sunscreen cosmetics such as foundations, eye shadows, blushers and the like having water and oil repellency can be easily dispersed and blended using commonly used oils and surfactants. Can do. Moreover, when mix | blended as cosmetics, the spread to skin is good and the touch without powderiness can be provided.

  In the cosmetic pigment powder according to the present invention, the coating amount of the phosphoric acid ester having a perfluoroalkyl group varies depending on the particle diameter of the pigment powder as a raw material to be coated, and is determined where sufficient water and oil repellency is exhibited. It should be. However, in general, when the coating amount exceeds 30% by weight, the phosphoric acid ester having a perfluoroalkyl group itself is precipitated, which may adversely affect the touch when blended in cosmetics. Absent. Further, the coating amount of the alkoxytitanium alkylate compound varies depending on the particle diameter of the pigment powder as a raw material to be coated, but when the coating amount is 0.1 to 20% by weight, the intended pigment powder is obtained. Is preferable. If the coating amount of the alkoxytitanium alkylate compound is less than 0.1% by weight, a generally used oil binder may not be able to obtain sufficient dispersibility. When the coating amount of the chelate compound exceeds 20% by weight, the oil repellency provided by the coating of the phosphoric acid ester having a perfluoroalkyl group may not be sufficiently exerted, or the copolymer of the alkoxytitanium alkylate compound and the binder This is not preferable because the powder particles may stick to each other and become a powder having a poor feel.

  According to the second invention, it is possible to obtain a cosmetic that exhibits water and oil repellency, spreads well on the skin, and has no powdery feel.

  Next, specific embodiments of the cosmetic pigment powder and the cosmetics containing the same according to the present invention will be described.

In the present embodiment, the following formula [RfC _n H _2n O] _y PO (OM) _3-y
(In the formula, Rf represents a perfluoroalkyl group having 3 to 21 carbon atoms or a perfluorooxyalkyl group, which is linear or branched and has a single chain length or a complex chain length. In addition, n represents an integer of 1 to 12, y represents an integer of 1 to 3, and M represents hydrogen, an alkali metal, ammonium, or substituted ammonium.)
As the phosphoric acid ester having a perfluoroalkyl group represented by the formula, a perfluoroalkyl phosphoric acid ester diethanolamine salt which is a solid content of an aqueous dispersion emulsion commercially available under the name AG-530 from Asahi Glass Co., Ltd. or Perfluoroalkyl phosphate sodium salt, perfluoroalkyl phosphate potassium salt, perfluoroalkyl phosphate ammonium salt, etc., which have the same molecular structure but different salt form.

On the other hand, the following formula (C _n H _{2n + 1} COO) _a Ti (OC _m H _{2m + 1} ) _b
(In the formula, n is an integer of 1 to 26, m is an integer of 1 to 12, a and b are each an integer of 1 to 3, and have a relationship of a + b = 4. The group may be linear or branched and may be single chain length or complex chain length.)
Examples of the alkoxytitanium alkylate compound represented by the formula include isopropoxytitanium tristearate, triisopropoxytitanium isostearate, isopropoxytitanium tripalmityrate, isopropoxytitanium trimyristylate, and the like.

  Examples of a method for simultaneously coating the perfluoroalkyl phosphate ester and the alkoxytitanium alkylate compound on the surface of the pigment powder as a raw material include the following methods.

  Predetermined amounts of perfluoroalkyl phosphate ester and alkoxytitanium alkylate compound are simultaneously dissolved or dispersed into an appropriate solvent so that the respective concentrations are 0.5 to 20% by weight. The pigment powder as a raw material is added to the solvent, and further stirred for a predetermined time. Thereafter, the mixture is heated (reduced pressure if necessary) to remove the solvent, and further heated at a temperature of about 110 ° C. for 6 hours to grind the residue. In this way, a desired cosmetic pigment powder having a surface coated with a perfluoroalkyl phosphate ester and an alkoxytitanium alkylate compound simultaneously is obtained. Suitable solvents used here are preferably polar organic solvents such as isopropyl alcohol and acetone.

  Here, the coating amount of the above-mentioned perfluoroalkyl phosphate ester varies depending on the particle diameter of the pigment powder as a raw material to be coated, and should be determined where sufficient water and oil repellency is exhibited. However, in general, when the coating amount exceeds 30% by weight, the phosphoric acid ester having a perfluoroalkyl group itself is precipitated, which may adversely affect the feel of the cosmetic when blended into the cosmetic. Therefore, the content is preferably 30% by weight or less.

  Further, the coating amount of the alkoxytitanium alkylate compound also varies depending on the particle diameter of the pigment powder as a raw material to be coated, but it is generally preferable that the coating amount is 0.1 to 20% by weight. When the coating amount of the alkoxytitanium alkylate compound is less than 0.1, a general dispersed oil component (for example, petroleum jelly, ceresin, microcrostaline wax, carnauba wax, candelilla wax, higher fatty acid, higher alcohol, squalane, fluid (Paraffin, ester oil, diglyceride, triglyceride, silicone oil, etc.) and general surfactants cannot be combined with cosmetics that show good dispersion. Perfluoropolyether, perfluorodecalin It is not preferable because an expensive fluorinated oil such as perfluorooctane must be used. Further, when the coating amount of the alkoxytitanium alkylate compound exceeds 20% by weight, the oil repellency provided by the coating of the above-mentioned perfluoroalkyl phosphate ester cannot be sufficiently exerted, or the alkoxytitanium alkylate compound is a binder. This is not preferable because the particles of the pigment powder may stick to each other.

  In this embodiment, examples of the pigment powder used as a raw material include inorganic pigments, organic pigments, and resin powder pigments. Here, as the inorganic pigment, titanium oxide, bengara, yellow iron oxide, black iron oxide, ultramarine, zinc white, magnesium oxide, zirconium oxide, mica, sericite, talc, silica, kaolin, calcium carbonate, chromium hydroxide, Examples thereof include magnesium silicate, aluminum oxide, barium sulfate, and titanium-coated mica. Examples of organic pigments include Risol Rubin B, Lake Red C, Risol Red, Rhodamine B, Herringdon Pink CN, Permanent Red, Benzidine Orange G, and Phthalocyanine Blue. Examples of the resin powder pigment include nylon powder, acrylic powder, and silicon powder.

  The pigment powder for cosmetics according to the present embodiment includes petrolatum, lanolin, microcrystal wax, carnauba wax without using an expensive fluorine-based dispersion compounding agent such as perfluoropolyether, perfluorodecalin, and perfluorooctane. , Canderia wax, squalane, liquid paraffin, ester oil, diglyceride, triglyceride, silicone oil and other cosmetics formulated with a combination of dispersed oily ingredients exhibit sufficient water and oil repellency and spread to the skin Is good and has a non-powdery feel.

  Here, the blending amount of the cosmetic pigment powder blended in the cosmetic as described above is preferably 0.1 to 100% by weight, more preferably, based on the total amount of the cosmetic. 1 to 60% by weight. As the cosmetic dosage form, conventionally known dosage forms such as bilayer, water-in-oil emulsion, oil-in-water emulsion, gel, spray, mousse, oily, solid and the like can be used. However, it is particularly preferred to use a two-layered, water-in-oil emulsion, or gel for sunscreen applications, and for solids, solid emulsions, gels, oils for foundation applications. Water-in-water emulsions, oil-in-water emulsions, oils, mousses and the like are particularly suitable.

  Next, specific examples of the cosmetic pigment powder and the cosmetics containing the same according to the present invention will be described.

(Production Example)
An isopropyl alcohol solution in which the number average carbon number 13 perfluoroalkyl phosphate ester ammonium salt is 5% by weight with respect to titanium oxide, and hexane in which isopropoxytitanium tristearate is 2% by weight with respect to titanium oxide. Make a solution. The perfluoroalkyl phosphate ammonium salt does not dissolve completely in isopropyl alcohol but exists as an emulsion, and the solution is cloudy. Next, 5 kg of titanium oxide is injected into the high-speed stirring mixer, and the above-mentioned solutions are added during the mixing and stirring, followed by stirring at 80 ° C. for 30 minutes, and then heating to 100 ° C. to decompress the inside of the stirring machine. This state is maintained for 2 hours, and isopropyl alcohol as a solvent is completely removed, followed by heat treatment at 110 ° C. for 6 hours. Thereafter, the mixture was pulverized with a hammer mill containing a 2 mm screen to obtain titanium oxide having a surface coated with 5% by weight of a perfluoroalkyl phosphate ester having 13 carbon atoms and 2% by weight of titanium tristearate. . In the same way, sericite, mica, talc, yellow iron oxide, bengara, black oxide with 5% by weight of perfluoroalkyl phosphate having 13 carbon atoms and 2% by weight of titanium tristearate simultaneously coated. I got iron.

(Production comparison example)
Only the isopropyl alcohol solution in which the perfluoroalkyl phosphate ammonium salt having 13 carbon atoms is emulsified is added to a high-speed stirring mixer into which 5 kg of titanium oxide has been injected. Titanium oxide, sericite, mica, talc, yellow iron oxide, red iron oxide, and black iron oxide having a surface coating of 5 wt% of perfluoroalkyl phosphate ester of formula 13 were obtained.

  Here, in order to confirm the water and oil repellency of the surface-coated cosmetic pigment powders obtained in the above production examples and production comparative examples, the contact angle with water and the contact angle with liquid paraffin were set to Elmer. It measured using the company made goniometer type contact angle measuring device. Table 1 shows the measurement results. From the results in Table 1, it can be seen that the cosmetic pigment powder prepared in the production example and the cosmetic pigment powder prepared in the production comparative example exhibit sufficient water and oil repellency.

(Example 1)
Using each cosmetic pigment powder obtained in the production examples, a powder foundation was prepared with the following composition.
Surface coated sericite 35.0
Surface coated talc 25.0
Surface coating mica 20.0
Surface coated titanium oxide 10.0
Surface coated yellow iron oxide 4.0
Surface coating Bengala 1.2
Surface coating black iron oxide 0.8
Nylon powder 4.0
_______________________________
100.0

The powder foundation was mixed with a Henschel mixer containing 88% as a powder base and 12% as a binder base. The powder base formulation at this time is as follows.
Dimethylpolysiloxane (6CS) 30.0
Dimethylpolysiloxane (10000CS) 25.0
Purified lanolin 9.0
Ester oil 36.0
_______________________________
100.0

(Example 2)
Using each cosmetic pigment powder prepared in the production examples, a W / O liquid foundation was prepared with the following composition.
Surface coated talc 3.0
Surface coated sericite 2.0
Surface coated titanium oxide 15.0
Surface coating Bengala 0.2
Surface coated yellow iron oxide 2.5
Surface coating black iron oxide 0.8
Methyl polysiloxane (6CS) 7.4
Dimethylcyclohexane
-Methyl (polyoxyethylene) dimethylsiloxane copolymer 1.8
Methyl polysiloxane (100CS) 8.0
Methyl polysiloxane (10000CS) 4.0
Methylphenyl polysiloxane 10.0
Ethanol 10.0
1,3-butylene glycol 2.0
Purified water 33.3
_______________________________
100.0

(Comparative Examples 1 and 2)
Using each cosmetic pigment powder prepared in Production Comparative Example, a powder foundation was prepared in the same formulation as in Example 1, and a W / O liquid foundation was prepared in the same formulation as in Example 2.

  The dispersion state, state stability, and water / oil repellency of each cosmetic prepared in Examples 1 and 2 and Comparative Examples 1 and 2 were examined, and the results are summarized in Table 2.

（◎：極めて良好、○：良好、△：普通、×：劣る）

(◎: Extremely good, ○: Good, △: Normal, ×: Inferior)

  As described above, the cosmetic pigment powder surface-treated in the production examples and the cosmetic pigment powder surface-coated in the production comparative examples both exhibit sufficient water and oil repellency. However, as shown in Table 2, the powder foundation (Example 1) formulated using the cosmetic pigment powder of the production example and the cosmetic pigment powder of the production comparative example were blended. In comparison with the powder foundation (Comparative Example 1), the powder foundation of Comparative Example 1 shows good water and oil repellency, but has the disadvantage of causing caking, whereas the powder foundation of Example 1 It was found that the dispersion state was good, the water and oil repellency was excellent, the composition was stable without causing caking, the spreadability to the skin was good, and a good feeling was exhibited without giving a powdery feeling.

  Moreover, when comparing the W / O liquid foundation of Example 2 with that of Comparative Example 2, the one of Comparative Example 2 is very unstable and quickly separates. It was found that the W / O liquid foundation of Example 2 has a good dispersion state of the W / O emulsion and exhibits good water and oil repellency when applied to the skin.

  As described above, according to the cosmetic pigment powder according to the present embodiment, a general dispersion can be achieved without using expensive fluorine compound binders such as perfluoropolyether, perfluorodecalin, and perfluorooctane. It has excellent performance such that it can be dispersed and blended in compounding agents (petrol, lanolin, microcrystal wax, carnauba wax, canderia wax, squalane, liquid paraffin, ester oil, diglyceride, triglyceride, silicone oil, etc.).

  In addition, according to the cosmetic blended with the pigment powder for cosmetics according to the present embodiment, the perfluoroalkyl phosphate ester and the alkoxytitanium alkylate compound are simultaneously coated on the surface, so the dispersion state is good and the dispersion Good stability and excellent water and oil repellency.

Claims (2)

To the pigment powder as a raw material, the following formula [RfC _n H _2n O] _y PO (OM) _3-y
(In the formula, Rf represents a perfluoroalkyl group having 3 to 21 carbon atoms or a perfluorooxyalkyl group, which is linear or branched and has a single chain length or a complex chain length. In addition, n represents an integer of 1 to 12, y represents an integer of 1 to 3, and M represents hydrogen, an alkali metal, ammonium, or substituted ammonium.)
And a phosphoric acid ester having a perfluoroalkyl group represented by the following formula: (C _n H _{2n + 1} COO) _a Ti (OC _m H _{2m + 1} ) _b
(In the formula, n represents an integer of 1 to 26, m represents an integer of 1 to 12, a and b are each an integer of 1 to 3, and have a relationship of a + b = 4. The group may be linear or branched and may be single chain length or complex chain length.)
A cosmetic pigment powder obtained by simultaneously surface-treating an alkoxytitanium alkylate compound represented by the formula:   A cosmetic comprising the cosmetic pigment powder according to claim 1.