JPH0892033A - Lipstick overcoat - Google Patents

Abstract

PURPOSE: To obtain a lipstick overcoat, excellent in stability with time without causing sagging in use and capable of improving the persistence of makeup effects of the lipstick by further applying onto a coated lipstick and suppressing the sticking to tableware, tobacco, etc. CONSTITUTION: This lipstick overcoat is obtained by blending (A) a particulate titanium oxide, preferably having 0.01-0.03μm particle diameter with (B) a perfluoropolyether represented by a compositional formula of formula I [R<1> to R<5> are each F, a perfluoroalkyl or an oxyperfluoroalkyl; (l), (m) and (n) are each an integer of >0 providing 500-100000 molecular weight, with the proviso that (l), (m) and (n) are not each 0]. preferably a perfluoropolyether, having 5-5000cSt viscosity and represented by formula II [(p) and (q) denote each a number providing 500-10000 molecular weight; (q/p) is 0.2-2] or formula III [(r) is 4-500]. The amounts of both the ingredients are within the ranges of 75-99.5wt.%, preferably 80-99wt.% ingredient (A) and 0.5-20wt.%, preferably 1-10wt.% ingredient (B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lipstick overcoat, and more specifically, by applying the lipstick to the lipstick overcoat, the duration of the cosmetic effect of the lipstick is improved, and adhesion to tableware, cigarettes, etc. is suppressed. It relates to a lipstick overcoat with improved dispersion stability and feel.

[0002]

2. Description of the Related Art Conventionally, lipstick overcoats have been provided as products for the purpose of maintaining the cosmetic effect of lipsticks and improving gloss. As these lipstick overcoats, for example, a water-based or alcohol-based polymer compound such as a cellulose-based polymer compound, a vinyl-based resin, or an acrylic resin, or a silicone oil is blended, and the characteristics of the blended polymer compound, What was used (Japanese Patent Publication Sho 61-1288
No. 3), a powdery or pressed product whose main component is a powder mixed with oil (Japanese Patent Application Laid-Open No. 61-24512), and the characteristics of the resin to be blended by dissolving the resin in a volatile solvent are utilized. Overcoat cosmetics (Japanese Patent Application Laid-Open No. 1-2425
No. 12) and the like.

Recently, a lipstick overcoat using a perfluoropolyether which is a fluorine-based liquid oil agent having excellent water and oil repellency is also known. (JP-A-5
-221829).

[Problems to be Solved by the Invention]

However, conventional lipstick overcoats and overcoat cosmetics have not been sufficiently satisfactory to prevent the lipstick from adhering (color transfer) to tableware, cigarettes and the like. In addition, powdery ones have poor usability, and the effect may vary depending on the coating method, and the ones containing a polymer compound, resin, etc. have a sticky feeling in use, which is a problem in terms of sensory aspects. was there.

On the other hand, a lipstick overcoat formed by combining perfluoropolyether with silica powder and / or alumina powder has a thin film on the skin surface because perfluoropolyether is not miscible with most substances and has a low surface tension. Since it has the characteristics of spreading and becoming, it has the effect of suppressing the adhesion (color transfer) to tableware, cigarettes, etc. and improving the sustainability of the makeup effect, but on the other hand, the powder separates when left for a while. However, there was a complication that it had to be mixed again immediately before use. Further, when applied on the lipstick, it has a drawback that it drips from the application part due to its low surface tension and enters the mouth or spreads to the lower jaw, which causes strong discomfort to the user.

In view of the above-mentioned drawbacks, the present invention has excellent dispersion stability during storage, has a good feeling of use such as no sagging on the lip surface during application, and has a long-lasting cosmetic effect of lipstick and tableware and cigarettes. It is an object to provide a lipstick overcoat excellent in non-adhesiveness to the like.

[Means for Solving the Problems]

As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that when perfluoropolyether is mixed with particulate titanium oxide having a specific particle size, adhesion (color transfer) to tableware, cigarettes, etc. is prevented. We have found that a lipstick overcoat can be obtained that does not sag when applied to the surface of the lips without impairing the effect, and that the powder and perfluoropolyether are stably dispersed for a long period of time without separation. The present invention has been completed based on the above.

That is, the present invention has a particle size of 0.01 μm to 0.0
3 μm fine titanium oxide powder and the following general composition formula (1):

[Chemical 2] (In the formula, R ¹ , R ² , R ³ , R ⁴ and R ⁵ are the same or different and each represents a fluorine atom, a perfluoroalkyl group or an oxyperfluoroalkyl group, and l, m and n have a molecular weight of 500 to An integer of 0 or more that gives 10,000 is provided, provided that perfluoropolyether represented by the formula (1 = m = n = 0 is not satisfied) is blended. It is a thing.

The present invention will be described in detail below.

The perfluoropolyether applied to the present invention is represented by the above-mentioned general formula (1) and is a non-volatile liquid having water repellency and oil repellency and at room temperature (about 25 ° C.). is there.

Of these, the viscosity is especially 5 to 5,000.
Perfluoropolyether of cSt is preferable, for example, the following general formula (2)

[0012]

[Chemical 3] (In the formula, p and q are numbers giving a molecular weight of 500 to 10,000, and q / p is 0.2 to 2), and commercially available products are FOMBLIN HC-04 and H
C-25, the same HC-R (above, manufactured by Montefluos), and the following general formula (3)

[0013]

[Chemical 4] (Wherein r represents a number of 4 to 500),
Commercially available products are Demnum S-20, S-65 and S-.
100, S-200 (manufactured by Daikin Industries, Ltd.) and the like.

These perfluoropolyethers account for 75% to 99.5% by weight, preferably 80 to 99%, of the total composition.
It is blended by weight%. If it is less than 75% by weight, the usability is not good, and if it exceeds 99.5% by weight, the amount of fine titanium oxide powder blended becomes small, which is not preferable.

The fine titanium oxide powder can be used as long as it has a particle size of 0.01 μm to 0.03 μm and is used in ordinary cosmetics. For example, Idemitsu Titania IT
S (made by Idemitsu Kosan Co., Ltd.) and the like can be preferably used.

The particle size of the fine titanium oxide particles is 0.03 μm.
When it exceeds m, the effect of suppressing the adhesion of lipstick to tableware, cigarettes, etc. is reduced, the dispersion stability is deteriorated, and the phenomenon of dripping from the lips after application occurs, which is not preferable.

Since titanium oxide particles having a particle size smaller than 0.01 μm are currently obtained only in the form of an aqueous sol, it is difficult to mix them with perfluoropolyether.
It is possible to mix by mechanically mixing and stirring while heating or by reducing the pressure, but in this case agglomeration of particulate titanium oxide occurs during the removal of water, and a lipstick overcoat with good dispersion stability is obtained. I can't get it.

This fine particle titanium oxide has a composition of 0.5
-20% by weight, preferably 1-10% by weight.
If less than 0.5% by weight, sufficient structural viscosity cannot be obtained, and
It is not preferable that the amount exceeds 10% by weight, because it becomes difficult to apply.

The fine particle titanium oxide used in the present invention is
If necessary, surface treatment such as Si treatment, fluorine treatment, and metal soap treatment may be applied before use, as long as the effects of the present invention are not impaired.

The lipstick overcoat of the present invention comprises:
Other components usually used in cosmetics, such as antioxidants, sequestering agents, water, fragrances, alcohols, preservatives, oils, surfactants, organic powders, inorganic powders, etc. are required within a range that does not impair the effects of the present invention. It can be appropriately blended according to.

The lipstick overcoat of the present invention can be produced by adding fine titanium oxide powder to perfluoropolyether and mixing them, and is obtained in the form of a paste.

[0022]

The present invention will be further described with reference to examples, but the present invention is not limited to these examples.

Example 1. (Prescription) Weight% Perfluoropolyether 92.8 (FOMBLIN HC-04) Fine particle titanium oxide 5.0 (Idemitsu Titania I-TS) Red 202 No. 0.1 Yellow 4 No. 0.1 Mica titanium 1.0

Example 2. (Prescription) Weight% Perfluoropolyether 95.8 (FOMBLIN HC-25) Fine particle titanium oxide 3.0 (Idemitsu Titania I-TS) Red 202 No. 0.1 Yellow 4 0.1 Mica titanium 1.0

Comparative Example 1. (Formulation)% by weight Perfluoropolyether 92.8 (FOMBLIN HC-04) Titanium oxide 5.0 (Taipaque A-100) Red No. 202 0.1 Yellow No. 4 0.1 Mica titanium 1.0

Comparative Example 2. (Formulation)% by weight Perfluoropolyether 95.8 (FOMBLIN HC-25) Titanium oxide 3.0 (Taipaque R-630) Red No. 202 0.1 Yellow No. 4 0.1 Mica titanium 1.0

Comparative Example 3. (Prescription) Weight% Perfluoropolyether 93.8 (FOMBLIN HC-04) Silica powder 5.0 Red 202 No. 0.1 Yellow 4 No. 0.1 Mica titanium 1.0

Comparative Example 4. (Formulation)% by weight Perfluoropolyether 95.8 (FOMBLIN HC-25) Alumina powder 3.0 Red No. 202 0.1 Yellow No. 4 0.1 Mica titanium 1.0

The test results of the temporal stability of the lipstick overcoat of the present invention are shown below. Test Example 1. With respect to the lipstick overcoats of Examples 1 and 2 and Comparative Examples 1 to 4, the stability of the product system after 2 weeks and 3 months of standing at room temperature was evaluated. In the evaluation, those which were not separated at all by visual observation were marked with ◯, those in which intermediate separation was observed were marked with Δ, and those which were completely separated were marked with x. The results are shown in Table 1.

[0030]

[Table 1]

As is clear from the results shown in Table 1, the particle size is 0.1
Titanium oxide of 5 to 0.25 μm (Taipaque A-10
0) was added to the lipstick overcoat of Comparative Example 1, titanium oxide having a particle size of 0.25 to 0.4 μm (Taipaque R-6).
The lipstick overcoat of Comparative Example 2 containing 30) and the lipstick overcoat of Comparative Examples 3 and 4 containing silica powder or alumina powder separated from mild to moderate after 2 weeks and completely separated after 3 months. On the other hand, it was proved that the composition containing the particulate titanium oxide of the specific particle diameter according to the present invention showed no separation even after 3 months and was extremely stable.

Test Example 2. Examples 1 and 2 and Comparative Examples 1 to 4
The lipstick overcoat is evaluated on a scale of 5 according to the following evaluation criteria for the evaluation items of the effect of preventing adhesion (color transfer) to tableware, cigarettes, the durability of the cosmetic effect, usability, and the presence or absence of dripping after application, and an average score Was used as the score. The evaluation criteria are shown in Table 2 and the evaluation results are shown in Table 3.

(Test method) 1. Color transfer prevention effect A 2 cm x 1 cm site was provided on the inner side of the human forearm, lipstick was applied twice thereto, and a lipstick overcoat was applied once, and then the glass plate was pressed to observe color transfer. 2. Persistence of cosmetic effect 30 professional panelists were divided into 6 groups, 5 groups each, and each group was coated with one of the lipstick overcoats of Examples 1 and 2 and Comparative Examples 1 to 4 at 9 am and then in the afternoon. It was used until 5 o'clock, and the durability of the cosmetic effect, usability, and sagging after application were evaluated.

[0034]

[Table 2]

[0035]

[Table 3]

As is clear from the results shown in Table 3, the overcoat of the present invention did not cause sagging after application as compared with the lipstick overcoats of Comparative Examples 1 to 4 and had good usability and usability. Also, the effect of improving the durability of the makeup effect and the effect of preventing the color transfer of the lipstick were high.

Test Example 3. Examples 1, 2 and Comparative Examples 3, 4
The effect of blocking ultraviolet rays was evaluated for the lipstick overcoat of No. (Test method) A lipstick overcoat was applied on a quartz glass plate to a thickness of 0.5 mil using a doctor blade, and a spectrophotometer (Hitachi, Spectrometer U-35) was used.
00), the transmittance at 300 nm was measured. The results are shown in Table 3.

[0038]

[Table 4]

As is clear from the results shown in Table 4, the lipstick overcoat of the present invention is much more excellent in ultraviolet blocking effect than the lipstick overcoats of Comparative Examples 3 and 4 in which silica powder or alumina powder is mixed.

The lipstick overcoat of the present invention has excellent stability over time, and there is no need to shake and mix the overcoat again before coating. In addition, after application, the overcoat does not drip from the lips and causes discomfort to the user, improves the durability of the makeup effect, suppresses the color transfer of lipstick to tableware, cigarettes, etc., and also has an anti-UV effect. It is excellent.

Claims (4)

[Claims] 1. Fine particle titanium oxide and the following general composition formula (1): (In the formula, R ¹ , R ² , R ³ , R ⁴ and R ⁵ are the same or different and each represents a fluorine atom, a perfluoroalkyl group or an oxyperfluoroalkyl group, and l, m and n have a molecular weight of 500 to The lipstick overcoat is represented by an integer of 0 or more which gives 10,000, provided that perfluoropolyether represented by the formula (1 = m = n = 0) does not hold). 2. The lipstick overcoat according to claim 1, wherein the amount of the perfluoropolyether blended is 75 to 99.5% by weight. 3. The amount of particulate titanium oxide to be blended is 0.
The lipstick overcoat according to claim 1 or 2, which is 5 to 20% by weight. 4. The lipstick overcoat according to any one of claims 1 to 3, wherein the particle size of the particulate titanium oxide to be blended is 0.01 μm to 0.03 μm.