JPS61197511A - Cosmetic composition - Google Patents

Abstract

PURPOSE:A cosmetic composition that contains kaolin particles coated with a specific amount of titanium oxide, thus enabling a large amount of titanium oxide to be included and being used as a homogeneous and stabilized sun- screening agent with high ultraviolet shielding. CONSTITUTION:Kaolin particles are coated with 1-50wt%, based on the total kaolin, of particles of titanium oxide and the resultant particles are added to give the objective composition. The kaolin particles coated with titanium oxide are prepared by adding a specific amount of kaolin particles of 0.5-30mum particle sizes to a titanium salt, hydrolyzing the titanium salt in the presence of the kaolin particles and filtering, rinsing, drying and roasting the resultant particles according to the usual manners. The resultant composition is used in the form of cake, milky foundation, white powder, lip sticks, lotion or cream. EFFECT:When it is used in sun-screening of skins, it gives good finish with good appearance and high sun shielding.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to cosmetic compositions for use as sunscreens.

BACKGROUND OF THE INVENTION Titanium oxide powder has been widely used as a cosmetic pigment. In particular, fine-particle titanium oxide powder with a maximum particle size of 0.1μ or less and an average particle size of 5 to 50 mm has been recently investigated for use in sunscreen cosmetics because it has a remarkable effect of blocking ultraviolet rays. There is. However, such fine particle titanium oxide has a large surface energy, and when cosmetics are manufactured using it, it is difficult to uniformly disperse it during manufacture, and it also tends to form aggregates during storage. Furthermore, if such microparticle titanium oxide is blended into a cake-like foundation soybean made from water, the cosmetic may not be applied evenly to the skin during use, resulting in a very poor finish, resulting in serious drawbacks as a cosmetic. There is.

Summary of the Invention The present inventors have conducted intensive studies to obtain a cosmetic composition uniformly and stably blended with titanium oxide, which has excellent ultraviolet blocking effects.As a result, the present inventors have discovered the use of kaolin particles covered with titanium oxide. As a result, the inventors discovered that the above-mentioned problems could be solved and completed the present invention.

That is, the present invention provides a beige cosmetic composition characterized by containing kaolin particles coated with titanium oxide particles.

According to the cosmetic composition of the present invention, compared to a case where titanium oxide and kaolin particles are simply mixed separately, a large amount of titanium oxide can be blended, and the cosmetic composition has a much higher ultraviolet blocking effect and is homogeneous and stable. A cosmetic composition is obtained which gives a good finish when applied to the skin, has an excellent appearance when makeup is applied, and has excellent sun protection effects.

Detailed Description of the Invention Titanium oxide-coated kaolin to be blended into a cosmetic composition is prepared by adding a predetermined amount of kaolin particles (0.5 to 30 μm in particle size) to an appropriate titanium salt, and then adding the kaolin particles in the presence of kaolin. It is obtained by hydrolyzing a titanium salt, followed by filtration, washing, drying, and calcination in a conventional manner. To give a specific example of a method for producing such titanium oxide-coated kaolin, 135 g of kaolin with an average particle size of 2 μm is added to 1/2 of an aqueous solution of titanyl sulfate of 15 g/fl (calculated as TiO), and the mixture is stirred while stirring. Heat, bring to a boil and hold for 2 hours. The product is filtered and washed with water, and the resulting cake is separated and dried at 110°C. Another 800°
Firing is performed at about C for 30 minutes to obtain titanium oxide coated kaolin used in the present invention.

In the titanium oxide-coated kaolin obtained by such a method, the surface of the kaolin particles serving as the base material is coated with fine particles of titanium dioxide.

Next, the ultraviolet blocking effect (S P F : Sun
Protection Factor), transparency, pluming, and stability are shown in Table 1 in comparison with a cream containing a conventional mixture of fine-particle titanium oxide (average particle size 8 mμ) and kaolin.

In addition, the SPF of the test cake-like foundation produced using the titanium oxide coated kaolin, the dispersibility during production,
The results of evaluating the difference in color tone during use and the finish during use are similarly shown in Table 2.

In addition, in the following, all % means weight %.

Each test cosmetic composition was obtained using the following composition and manufacturing method.

(a) Composition of test cream: Component A Amount (%) Solid paraffin 5.0 Beeswax
4.0 Microcrystalline wax 4.0 Vaseline 7
．． 0 Squalane 30.0 Sorbitan polyoxyethylene monolaurate (20EO) 1.0
Sorbitan sesquioleate 4.0 ingredients
B Blend amount (%) Purified water
Residual acid content C content (%) Titanium oxide coated kaolin [1,! , listed in Table 1 or mixture of titanium oxide and kaolin [■] (Ratio of titanium oxide/[■] or [IT] is listed in Table 1) Talc 5.0 The above acid content C is uniformly mixed. , is added to component B, and is well dispersed at 70°C. Separately, component A is heated and dissolved at 70° C., the above mixture is added thereto, and the mixture is uniformly emulsified using a pomo mixer. After emulsification, the product is cooled to 30°C.

(b) Composition of cake-like foundation.

Component A Blend amount (%) Titanium oxide coated kaolin [I], listed in Table 1 or mixture of titanium oxide and kaolin [II] (ratio of titanium oxide/[I] or [1] listed in Table 1) Listed) Talc Remaining red iron
1.0 yellow iron oxide
2.5 black iron oxide
0.05 component B
Blend amount (%) Liquid paraffin 8
．． 5I I) P l
, 0 sorbitan sesquioleate 3.0
Propylene glycol 2.5 paraben
0.2 component C compounding amount (
%) Fragrance 0.25° above
Mix component A with a Henschel mixer for 5 minutes. on the other hand,
Component B, which was heated and dissolved at 70° C. in another container, was added dropwise to the component A while stirring and mixing.

Then, component C was added to the mixture and stirred and mixed for 1 minute,
A fixed amount of the obtained mixture is filled into a metal plate to produce a cake-like foundation noyon.

Evaluation of each of these cosmetic compositions was performed by the following method.

(1) SPF Light source: Toshiba FL20S-E-303 Center wavelength: 306 nm Distance to irradiated area: 60 cm Irradiated area: Back test of two Japanese, fair-skinned and normal-skinned adult men and women Cosmetic application amount: 0.2g/ According to the SPF' measurement method specified by the FDA under the above conditions,
The light intensity was kept constant and the irradiation time was varied from 3 to 60 minutes to determine the minimum erythema-inducing ultraviolet ray fi between the area where the test cosmetic was not applied and the area where it was applied.
The ratio of (MED) was determined using the following formula.

The validity of the measured values is confirmed by the FDA standard xanscreen (8
% pomosarate a-noyon) (n=2
0 or more).

(2) Transparency When the test cream was spread on the skin, a panel of 10 people evaluated whether a white tinge was observed or not.

○: None of the 10 people recognized the white taste △: 1 to 5 people recognized the white taste ×: 6 or more people recognized the white taste (3) Blooming When the test cream was spread on the skin, blooming (
A panel of 10 people evaluated whether or not a blue tint was observed. Note that this blooming tends to occur with conventional cosmetics containing fine particle titanium oxide.

○: None of the 10 people noticed a blue taste. △: 1 to 5 people found a blue taste. The presence or absence of aggregation (stubble) was observed and evaluated according to the following criteria.

○: No abnormality △: Slight lumps are observed ×: Clear lumps are observed (5) Observe the presence or absence of uneven lumps (fine particle titanium oxide) in the test cake-like foundation obtained by dispersion pressing. death,
Evaluation was made based on the following criteria.

○: Non-uniform clumping, absent △: Non-uniform clumping, slightly observed ×: Non-uniform clumping, present (6) Color difference test The color of the cake-like foundation product itself and
A panel of 10 people evaluated whether there was a difference in color when applied to the skin.
Evaluated by. Note that this difference in color tends to occur in cosmetics containing conventional fine-particle titanium oxide.

○: 9 or more people judge that it is the same △: 2 to 5 people judge that there is a difference X: 6 or more people judge that there is a difference (6) Finish feeling test Apply cake-like foundation to skin using water do. Evaluate the presence or absence of a phenomenon in which the applied powder causes aggregation and the white powder collects around the application area (whitening), or the presence or absence of uneven finish using the following criteria.

do.

O: No whitening occurs △: Slight whitening occurs (or powdery finish) ×: Whitening occurs (or uneven coating occurs) 1st
As is clear from Tables 1 and 2, the cream and cake-like foundation of the present invention containing titanium oxide-coated kaolin are far more effective than conventional cosmetic compositions containing simply mixing fine-particle titanium oxide with kaolin. It can be incorporated into cosmetics in a wide range of amounts, provides excellent ultraviolet blocking effects, and exhibits desirable properties as cosmetics.

Further, the amount of titanium oxide coated on the titanium oxide-coated kaolin is preferably 1 to 50%. If the coating amount is less than 1%, the UV blocking effect will not be sufficient, while if it exceeds 50%, the properties as a cosmetic will deteriorate. The amount of the titanium oxide-coated kaolin in the entire composition may be varied within a range of 90% or less depending on the form of the cosmetic.

Furthermore, the cosmetic composition of the present invention may contain 3% or less of conventional fine particle titanium oxide.

Examples of the cosmetic composition of the present invention include cake-like or milky lotion foundations, white powders, lipsticks, milky lotions, and creams.

In order to produce these cosmetic compositions, the titanium oxide-coated kaolin described above is blended and treated in a conventional manner.

EXAMPLES The present invention will be explained in more detail below based on examples.

Example 1 A cake-like foundation was manufactured using the following composition.

Component A Amount (%) Titanium oxide coated kaolin (limb rr1'210%) 50
, 0 fine particle titanium oxide (average particle size 8m7z) 3.0 Talc 29.3 Red iron
0.6 yellow iron oxide
1.5 black iron oxide
0.15 ingredient B
Blend amount (%) Liquid paraffin
85 Isopropyl balmitinoate 10 Sorhitane sesquioleate 30 Propylene glycol 25 Paraben
0.2 component C blending amount (%) Fragrance 0.25 component A
Mix with a Hennel mixer for 5 minutes.

Meanwhile, in another container, component B, which had been heated and dissolved at 70°C, was added dropwise to the above components while stirring and mixing. Next, component C was added and mixed with stirring for 1 minute. A cake-like foundation soyon was produced by filling the mixture into a bundle.

In the production of this foundation, titanium oxide was uniformly dispersed, and upon use, it could be applied uniformly to the skin and the finish was very good.

Example 2 A milky lotion foundation was manufactured using the following composition.

；Broken A Mixture m (%) Liquid paraffin 4.0 Glycerin monostearate 20 Stearic acid
30 lanolin
20 Solid Balafino 0.5 Propylene glycol monostearate 05 Propyl para-oquinobenzoate 01 Component B
Blend m (%) Purified water
57.2 Triethanolamine 1
．． 0 Sodium carboxin methylcellulose 0.2 Bentonite 05 Polyoxyethylene sorbitan monostearate 1.5 Propylene glycol 7.5 Component C blending amount (%) Titanium oxide coated kaolin (coating amount 30%) I O,0
Fine particle oxide (average particle size 8mμ) 2.0 Talc 5.0 Red iron oxide 0.7 Yellow iron oxide
2.0 black iron oxide
0.3 After heating and dissolving component A and component B in separate containers to 80° C., component B is added to component A. After stirring for 10 minutes and adding component C,
The mixture was stirred for a minute and cooled to 30° C. to produce a milky foundation.

In producing the foundation, the titanium oxide was uniformly dispersed and did not aggregate during storage, and when used, it could be applied uniformly to the skin and the finish was very good.

Example 3 A white powder was produced with the following composition.

Component A Amount (%) Titanium oxide coated kaolin (1%) 90.0 Talc 5.0 Yellow iron oxide 1.5 Red iron oxide
14 black iron oxide
0.1 Ingredient B Blending amount (%) Squalane 2.2
Sorbitan sesquioleate o55 formulation C application I
J Fragrance O33 Mix A with a Hennel mixer for 5 minutes.

On the other hand, component B is uniformly melted at 70'C using another container, and is added dropwise to component A while stirring and mixing. Furthermore, after dropping component C, stir and mix for 1 minute, and
to obtain a product.

In the production of the white powder, titanium oxide was uniformly dispersed, and upon use, it was possible to uniformly apply it to the skin, resulting in a very good finish.

Example 4 A lipstick was manufactured with the following composition and then collected.
A Blending amount (%) Ditano oxide coated kaolin' (coating 120%) 50 Mica powder 5,0 Red 20
No. 2 05 Red No. 204
0.5 component B
Compounding amount (%) Candelilla wax
7.0 Solid paraffin 70 Beeswax 50 Carnauba wax 5.0 Himano oil
448 Isopropyl myristate
100 Component C Amount (%) Fragrance 0.2 Component A and a part of Himanura are uniformly kneaded using a mortar to form a pigment part. The remainder of component B is heated and dissolved, the surface pigment part is added thereto, and the mixture is uniformly dispersed using a homomixer, and then component C is added and dispersed. This is poured into a mold and rapidly cooled into a stick shape, and the resulting solid substance is fixed in a container and framed to produce a product.

In producing the lipstick, titanium oxide was uniformly dispersed, and upon use, it could be applied uniformly to the lips, giving a very good finish.

Example 5 A milky lotion was produced with the following composition.

Ingredients A Mixture m (%) Stearic acid 3.0 Cetyl alcohol 1.5 Vaseline
5.0 liquid paraffin
12.0 Paraoxene ethylene monooleate (I0EO) 2.5 Component B Blending amount (%) Polyethylene glycol 1500 2.0 Triethanolamine 10 Purified water
71.5 Titanium oxide coated kaolin (coating amount 50%) ■, 0 Component C blending amount (%) Fragrance 0.5 Component B is heated and uniformly dispersed at 70°C.

Separately, heat and dissolve component A at 70°C, and then dissolve component B.
Add to this and homogeneously emulsify using a homomixer. After emulsification, the mixture is further cooled to 30°C while stirring to form a product.

In the production of the emulsion, the titanium oxide was uniformly dispersed and did not aggregate during storage, and upon use, it could be applied uniformly to the skin and the finish was very good.

Example 6 A cream was produced with the following composition.

Component A Amount (%) Solid paraffin 5.0 Beeswax
4.0 Microphone [7 Crystalline Wax 4.0 Vaseline 7
．． 0 Squalane 30.0 Sorbitan polyoxyethylene monolaurate (20EO) 1.0
Sorbitan sesquioleate 4.0 ingredients
B Blend amount (%) Purified water
20.0 Component C blending amount (%) Titanium oxide coated kaolin (coating amount 5%) 20.0 Talc 5.0 Above acid content C
Mix uniformly, add to the ingredient port, and disperse well at 70°C. Separately, component A is heated and dissolved at 70°C, the mixture is added thereto, and the mixture is uniformly emulsified using a homomixer. After emulsification, cool to 30°C to obtain a product.

In the production of the cream, the titanium oxide was uniformly dispersed and did not aggregate during storage, and when used, it could be applied uniformly to the skin and the finish was very good.

Claims (2)

[Claims] (1) A cosmetic composition characterized by containing kaolin particles coated with titanium oxide. (2) The cosmetic composition according to item 1 above, wherein the amount of titanium oxide coated with respect to the entire kaolin coated with titanium oxide is 1 to 50% by weight.