JP2006348009A - Pigment for cosmetic and cosmetic containing the pigment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain pigment for cosmetic, which uses generally used oil and surfactant, has excellent spread to the skin, provides the skin with a moist touch and excellent water/oil repellency and a cosmetic containing the pigment. <P>SOLUTION: The pigment for cosmetic is obtained by subjecting pigment powder for cosmetic to surface treatment with a perfluoroalkylalkoxysilane and a polyether group-containing alkoxysilane. The satisfactory cosmetic is obtained by mixing the pigment for cosmetic by using a general compounding agent of dispersion. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cosmetic pigment containing water and oil repellency and blended in makeup cosmetics or sunscreen cosmetics such as foundations, eye shadows and cheeks, and cosmetics comprising the cosmetic pigments It is about.

  Conventionally, cosmetic pigments used in makeup cosmetics such as foundations, eye shadows, and cheeks, or sunscreen cosmetics, etc., have no water repellency, and make up according to the water quality such as skin sweating, tears, and rain. It is easy to cause breakage, and if it is not oil-repellent, it tends to cause makeup breakage due to skin lipids and the like.

  Therefore, for example, Patent Documents 1 to 3 propose a technique in which the surface of a pigment is surface treated with a perfluoroalkyl phosphate compound to impart water and oil repellency to the pigment. For example, Patent Document 4 proposes a method in which a surface of a pigment is surface-treated with perfluoroalkylalkoxysilane to impart water and oil repellency to the pigment.

  However, even when this perfluoroalkyl phosphate compound or perfluoroalkylalkoxysilane is used, it is a good dispersion state with only commonly used aliphatic or silicon oils, so-called binders and surfactants. Since satisfactory cosmetics with a good touch cannot be obtained, fluorine oils such as perfluoropolyether, perfluorodecalin and perfluorooctane are used as disclosed in Patent Documents 5 and 6, for example. To be done.

Japanese Patent Publication No. 5-86984 JP-A-3-246210 JP-A-4-330007 JP 2001-2524 A JP-A-4-224506 JP-A-5-39209

  However, fluorine oils such as perfluoropolyether, perfluorodecalin, and perfluorooctane described above are very expensive, and therefore, there is a problem that only a specific cosmetic is incorporated. In addition, cosmetics obtained by using this oil, particularly powder foundations, have a problem that they have a very light and smooth feel and, in other words, a powdery feel.

  The present invention has been made to solve such problems, and can use commonly used oils and surfactants, and has a good spread to the skin and is moist. An object of the present invention is to provide a cosmetic pigment that can give a touch and is excellent in water and oil repellency and a cosmetic containing the pigment.

In order to achieve the above object, the cosmetic pigment according to the first invention comprises:
A pigment powder for cosmetics is surface-treated with a perfluoroalkylalkoxysilane represented by the following general formula (1) and an alkoxysilane having a polyether group represented by the following general formula (3). It is characterized by this.

The cosmetic pigment according to the second invention is
A pigment powder for cosmetics is coated with a phosphoric acid ester having a perfluoroalkyl group represented by the following general formula (2) and an alkoxysilane having a polyether group represented by the following general formula (3). It is characterized by being processed.

Next, the cosmetic according to the third invention is:
It contains the cosmetic pigment of the first invention or the second invention.

  According to the cosmetic pigment of the present invention, it has water and oil repellency and is generally used, for example, petroleum jelly, ceresin, microcrystalline wax, carnauba wax, candelilla wax, higher fatty acid, higher alcohol, squalane, fluid Oils such as paraffin, ester oil, diglyceride, triglyceride, silicone oil, and general surfactants can be used. In addition, when formulated as makeup cosmetics such as foundations, eye shadows, and cheeks, and sunscreen cosmetics, they can be easily dispersed and blended, and when used as cosmetics, they spread well to the skin. Can give a moist feel. In addition, according to the cosmetic of the present invention, it is possible to obtain a cosmetic that exhibits water and oil repellency and has a function of preventing makeup slippage and has a moist feeling and excellent usability.

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

にて示されるパーフルオロアルキルアルコキシシランとしては、例えばトリフルオロプロピルトリメトキシシラン、トリデカフルオロオクチルトリメトキシシラン、トリフルオロプロピルトリエトキシシラン、トリデカフルオロオクチルトリエトキシシラン、ヘプタデカフルオロデシルトリエトキシシラン等が挙げられる。 The coating agent used in the present invention has the following general formula (1);

Examples of the perfluoroalkylalkoxysilanes represented by are trifluoropropyltrimethoxysilane, tridecafluorooctyltrimethoxysilane, trifluoropropyltriethoxysilane, tridecafluorooctyltriethoxysilane, and heptadecafluorodecyltriethoxysilane. Etc.

にて示されるパーフルオロアルキル基を有するリン酸エステルとしては、例えば旭硝子（株）からＡＧ−５３０の名称で市販されている水分散エマルジョンの固形分であるパーフルオロアルキルリン酸エステルジエタノールアミン塩、またはこれと同じ分子構造をもつが塩の形が異なるパーフルオロアルキルリン酸エステルナトリウム塩、パーフルオロアルキルリン酸エステルカリウム塩、パーフルオロアルキルリン酸アンモニウム塩等が挙げられる。 Moreover, the following general formula (2);

As the phosphate ester having a perfluoroalkyl group represented by the formula, for example, a perfluoroalkyl phosphate 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 Examples thereof include perfluoroalkyl phosphate sodium salts, perfluoroalkyl phosphate potassium salts, perfluoroalkyl phosphate ammonium salts having the same molecular structure but different salt forms.

にて示されるポリエーテル基を有するアルコキシシランとしては、例えばデグサ（株）からＤＹＮＡＳＹＬＡＮ４１４０の名称で、また信越化学工業（株）からＫＢＭ−６４１の名称で市販されているものが挙げられる。 Moreover, the following general formula (3);

Examples of the alkoxysilane having a polyether group represented by the formula include those commercially available from Degussa Corporation under the name DYNASYLAN4140 and from Shin-Etsu Chemical Co., Ltd. under the name KBM-641.

  Perfluoroalkylalkoxysilane represented by the general formula (1) or a phosphoric ester having a perfluoroalkyl group represented by the general formula (2) and an alkoxysilane having a polyether group represented by the general formula (3) As a method for coating the surface of the pigment powder for cosmetics, for example, there are the following methods.

  First, a predetermined amount of perfluoroalkylalkoxysilane represented by the general formula (1) or a phosphoric acid ester having a perfluoroalkyl group represented by the general formula (2) to be coated on the mixing stirrer and the above Weigh out the amount of the alkoxysilane having a polyether group represented by the general formula (3) in an amount of 0.05 to 30% by weight of the cosmetic pigment powder to prepare a mixed solution. Is dropped on the pigment powder for cosmetics under stirring to perform surface treatment. Thereafter, the mixture is heated at about 100 ° C. for 6 hours to obtain a desired water / oil repellent cosmetic pigment powder.

  In addition, there are other methods as follows. That is, a predetermined amount of perfluoroalkylalkoxysilane represented by the general formula (1) or a phosphate ester having a perfluoroalkyl group represented by the general formula (2) to be coated on the surface and the general formula The alkoxysilane having a polyether group represented by (3) is weighed in an amount of 0.05 to 30% by weight of the cosmetic pigment powder, and dissolved or dispersed into an appropriate solvent to form an emulsion. The pigment powder for cosmetics is added during the heating and stirring, and the mixture is stirred for a certain time. Thereafter, the solvent is removed by heating (reduced pressure if necessary), and then heated at about 100 ° C. for 6 hours, and then pulverized to obtain the desired water / oil repellent cosmetic pigment powder. obtain. As the solvent used here, a polar organic solvent such as isopropyl alcohol and acetone is suitable.

  Here, the coating amount of the perfluoroalkylalkoxysilane represented by the general formula (1) or the phosphoric ester having a perfluoroalkyl group represented by the general formula (2) is the particle of the raw material powder to be coated Depending on the diameter, it should be determined where sufficient water and oil repellency is exhibited. Generally, when the coating amount exceeds 30% by weight, the perfluoroalkylalkoxysilane represented by the general formula (1) is used. Alternatively, the phosphoric acid ester having a perfluoroalkyl group represented by the general formula (2) itself is precipitated, and when blended as a cosmetic, there is a possibility of adversely affecting the touch. The following should be used.

  On the other hand, the coating amount of the alkoxysilane having a polyether group represented by the general formula (3) also varies depending on the particle diameter of the raw material powder to be coated, but is generally 0.05 to 20% by weight. Thus, the desired powder can be obtained. When this coating amount is less than 0.05% by weight, when blended as a cosmetic, good dispersion is not obtained with a commonly used oil binder, or a moist feeling is obtained when blended into a cosmetic. It may not be possible. Further, when this coating material exceeds 20% by weight, the coating of the perfluoroalkylalkoxysilane represented by the general formula (1) or the phosphoric acid ester having the perfluoroalkyl group represented by the general formula (2) There is a possibility that the oil repellency brought about by the resin may not be sufficiently developed, or the feeling may be deteriorated by the reaction between the coating agents.

  Cosmetic pigments that are surface-coated according to the present invention 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.

  According to the cosmetic pigment of the present invention, when blended in a cosmetic, without using a fluorine-based dispersion compounding agent such as perfluoropolyether, perfluorodecalin, and perfluorooctane, the dispersed oil component For example, it is possible to easily blend and adjust cosmetics using general oil components such as petrolatum, lanolin, microcrystalline wax, carnauba wax, canderia wax, squalane, liquid paraffin, ester oil, diglyceride, triglyceride, silicone oil, etc. it can. In addition, the cosmetics that have been blended and adjusted exhibit sufficient water and oil repellency that should be required, and have the effect of being able to impart a moist feel with good spreadability to the skin.

  In addition, as a compounding quantity of the said pigment for cosmetics mix | blended with cosmetics, 0.1 to 100 weight% is preferable with respect to the total amount of cosmetics, More preferably, it is 1 to 80 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, etc. can be used. . In particular, for use as a sunscreen agent, a two-layered, water-in-oil emulsion or gel is preferred, and for a foundation as a solid, solid emulsion, gel, water-in-oil emulsion, oil-in-water type. Emulsions, oils, mousses and the like are preferred.

  Next, specific examples of the cosmetic pigment and the cosmetic containing the pigment according to the present invention will be described below. In addition, this invention is not limited to the Example described below.

(Production Example 1)
A isopropyl alcohol mixed solution of 5% by weight of DYNASYLAN F8261 (tridecafluorooctyltriethoxysilane) manufactured by Degussa and 1% by weight of DYNASYLAN 4140 manufactured by Degussa is prepared with respect to 1 kg of titanium oxide for cosmetics and stirred in a stirring tank. The mixture was mixed with titanium oxide, and isopropyl alcohol was removed by heating to take out the powder from the stirring tank. Thereafter, heat treatment was performed at 100 ° C. for 6 hours, and crushed and surface-coated titanium oxide was obtained. In the same manner, seven types of cosmetic pigments were obtained using sericite, talc, mica, yellow iron oxide, red iron oxide, and black iron oxide in place of titanium oxide.

(Production Example 2)
A perfluoroalkyl phosphate ammonium salt having a carbon number of 5% by weight and 1% by weight of DYNASYLAN 4140 made by Degussa Co., Ltd. is prepared in a stirring tank and stirred in a stirring tank. The mixture was mixed with titanium oxide, and isopropyl alcohol was removed by heating to take out the powder from the stirring tank. Thereafter, heat treatment was performed at 100 ° C. for 6 hours, and crushed and surface-coated titanium oxide was obtained. In the same manner, seven types of cosmetic pigments were obtained using sericite, talc, mica, yellow iron oxide, red iron oxide, and black iron oxide in place of titanium oxide.

(Production Comparative Example 1)
Surface coating was carried out in the same manner as in Production Example 1 using 5% by weight of DYNASYLAN F8261 (Tridecafluorooctyltriethoxysilane) manufactured by Degussa Co. per 1 kg of cosmetic pigment, and an oxidation exhibiting water and oil repellency. Seven types of cosmetic pigments were obtained: titanium, sericite, talc, mica, yellow iron oxide, bengara, and black iron oxide.

  For each of the surface-coated pigments of Production Examples 1 and 2 and Production Comparative Example 1, the water repellency and oil repellency were measured. The measurement results are shown in Table 1. Here, the contact angle with water was measured for the water repellency, and the contact angle with paraffin was measured for the oil repellency. The contact angle was measured using a goniometer type contact angle measuring device manufactured by Elmer.

Example 1
Using the pigment prepared in Production Example 1, 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. At this time, the binder base was blended as follows.
Dimethylpolysiloxane (6CS) 30.0
Dimethylpolysiloxane (10000CS) 25.0
Purified lanolin 9.0
Ester oil 36.0
100.0

(Example 2)
Using the pigment prepared in Production Example 2, 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 Example 1)
A powder foundation was prepared using the pigment prepared in Production Comparative Example 1 as a surface coating pigment with the same formulation as in Example 1.

(Comparative Example 2)
A W / O liquid foundation was prepared using the pigment prepared in Production Comparative Example 1 as a surface coating pigment with the same formulation as in Example 2.

  The results of dispersion state, dispersion stability, water repellency, and oil repellency were summarized for each of the cosmetics of Examples 1 and 2 and Comparative Examples 1 and 2. The results are shown in Table 2.

  From the results shown in Table 1, the surface-coated pigments prepared in Production Examples 1 and 2 have satisfactory water and oil repellency. Moreover, from the results shown in Table 2, according to the powder foundation of Example 1, the dispersion state is good, the water and oil repellency is good, and the state is stable without causing caking. Moreover, the extensibility to skin was also good and it was moist and did not become a powdery touch. On the other hand, the powder foundation of Comparative Example 1 shows good water and oil repellency, but causes caking and cannot be said to be a good powder foundation.

  On the other hand, in the W / O liquid foundation of Example 2, the stability and dispersion state of the W / O emulsion are good, exhibit good water and oil repellency when applied to the skin, and give a moist feel. . On the other hand, in Comparative Example 2, the W / O emulsion was very unstable and immediately separated, and a stable W / O liquid foundation could not be obtained.

  As described above, according to the cosmetic pigment of this production example and the cosmetic of this example containing the cosmetic pigment, the water- and oil-repellency is excellent, and the perfluoropoly Commonly used dispersion compounding agents (eg petrolatum, lanolin, microcrystalline wax, carnauba wax, canderia wax, squalane, fluidization, without blending fluorine compound binders such as ether, perfluorodecalin, perfluorooctane, etc. Paraffin, ester oil, diglyceride, triglyceride, silicone oil, etc.) can be said to have an excellent effect of being easily dispersible and compounded.

Claims (3)

A pigment powder for cosmetics is surface-treated with a perfluoroalkylalkoxysilane represented by the following general formula (1) and an alkoxysilane having a polyether group represented by the following general formula (3). A cosmetic pigment characterized by that.

A pigment powder for cosmetics is coated with a phosphoric acid ester having a perfluoroalkyl group represented by the following general formula (2) and an alkoxysilane having a polyether group represented by the following general formula (3). A cosmetic pigment characterized by being processed.

  A cosmetic comprising the cosmetic pigment according to claim 1 or 2.