JPH01283209A - Oily cosmetic - Google Patents

Abstract

PURPOSE:To obtain an oily cosmetic having excellent touch such as smooth spread in application, possession of substance or good settlement, containing a composition consisting of a high-viscosity silicone and a low-viscosity silicone oil and a solid oil having compatibility with the composition. CONSTITUTION:An oily cosmetic comprising a cosmetic base containing (A) a silicone composition consisting of A1: a high-viscosity silicone such as a dimethylpolysiloxane having >=1,000,000cs viscosity and >=6,000 degree of polymerization and A2: a low-viscosity silicone oil such as dimethylpolysiloxane or cyclic octamethylcyclotetrasiloxane having <=50cs viscosity in the weight ratio of A1 and A2 of <=1/4 and (B) a solid oily agent having compatibility with the composition, such as paraffin wax, cetyl palmitate and powder for cosmetic. When the oily cosmetic is molded into a stick-shaped state, a solid cosmetic having excellent releasability from molds and luster of external appearance is obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an oil-based cosmetic, and more specifically, to an oil-based cosmetic that spreads smoothly and has a rich body when applied.

It is an excellent oil-based cosmetic, especially a solid cosmetic, that has an excellent feel such as a smooth texture, and when molded into a stick shape, has good release properties from the container and has a glossy appearance. be.

[Conventional technology and its problems]

Oil-based cosmetics are widely used because they have excellent properties such as adhesion to the skin, covering power, and water resistance of the cosmetic film. Conventional oil-based cosmetics generally use an oil-based base consisting of semi-solid oil, liquid oil, and solid oil, or an oil-based base that is further mixed with an oil-based gluing agent to form a gel. It is manufactured by mixing, dispersing, solidifying, and molding.

However, since conventional oil-based cosmetics have a high oil content, they give a sticky and oily feeling that is characteristic of oil-based products. It had drawbacks such as poor elongation and spread.

In order to improve these drawbacks, one method has been to incorporate a less greasy oil, such as a low viscosity silicone oil. As a solid cosmetic containing a low-viscosity silicone oil, a stick cosmetic (Japanese Patent Application Laid-Open No. 60-248604) containing 15 to 50 parts by weight of silicone oil with a viscosity of 100 cm or less is known.

However, even if an oil agent with low oiliness is blended, the oiliness of the oil base cannot be sufficiently eliminated. In particular, although low-viscosity silicone oil itself has a light feel with little stickiness, when blended with a normal oil base, it cannot impart a light feel.
Furthermore, it has been difficult to maintain a stable cosmetic composition due to poor compatibility with oily bases. In addition, in this case, the smoothness of application and ease of settling were not fully satisfactory.

In general, oil-based cosmetics have a high content of oils, which makes them difficult to apply. It has been attempted to prepare a mixture containing a large amount of .

However, these lacked smooth application during application and were not fully satisfactory.

[Means to solve the problem]

In view of the above-mentioned circumstances, the present inventors conducted intensive research in order to obtain an oil-based cosmetic that has an excellent feeling of use and is resistant to makeup deterioration. The inventors of the present invention have completed the present invention by discovering that an oil-based cosmetic obtained by combining a certain oil agent and cosmetic powder satisfies the above requirements.

That is, the present invention contains a silicone composition comprising a high viscosity silicone and a low viscosity silicone oil, a cosmetic base and a cosmetic powder comprising a solid oil agent that is compatible with this silicone composition. The present invention provides an oil-based cosmetic with all the above characteristics.

The cosmetic base of the present invention essentially contains a silicone composition consisting of a high-viscosity silicone and a low-viscosity silicone, and a solid oil that is compatible with the silicone composition.

The high viscosity silicone used in the present invention has Fi, a viscosity of 1
It has a degree of polymerization exceeding 1,000,000 c3t, and has a degree of polymerization of 3,000 or more.
Examples include Shin-Etsu Silicone K1-761jS (manufactured by Shin-Etsu Chemical Co., Ltd.) and TSE200m (manufactured by Toshiba Silicone).Also, low-viscosity silicone oils include, but are not particularly limited to, viscosity 50'cg. It can be suitably used as long as it is below this level. However, this low-viscosity silicone oil is blended to dissolve the above-mentioned high-viscosity silicone, and if the amount used is relatively small (for example, within 50% by weight per final product concentration), it should be 100c88 or less. There is no problem even if it is something like that.

This is because as the viscosity increases, the use of a large amount will result in a greasy feeling to the touch, which is unfavorable in terms of feel.

And as a low viscosity silicone oil, is it a low degree of polymerization chain zomethyl? Risiloxane, methylphenyl? resiloxane,
Examples include cyclic octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane, and one or more of these may be appropriately selected and used as required.

The silicone composition is prepared by mixing high viscosity silicone with low viscosity silicone oil, dissolving it, and making it homogeneous. In this case, the mixing ratio (weight) of high viscosity silicone and low viscosity silicone oil may be arbitrarily set to 1/4 or less. If this ratio increases and the amount of high viscosity silicone increases, it will be difficult to easily blend the product with a suitable viscosity when preparing the final product, and the solubility in mixing with other oils may deteriorate.

In the present invention, Fi is prepared by blending a solid oil in addition to the above-mentioned silicone composition, but it is necessary to use a solid oil that is compatible with the silicone composition. In other words, if you do not select and use a compatible solid oil,
It has poor miscibility, and precipitation of highly viscous silicone and separation of solid oil occur during heating and dissolution, resulting in a non-uniform state when the final product is made, which is unfavorable in terms of appearance and usability. . Examples of such solid oil agents that are compatible with the silicone composition include e-rough-in wax, ceresin wax, and ? Liethylene wax,
Cetyl rumitate, higher alcohol (cetanol)
, stearic acid and the like.

Next, the cosmetic powders to be added and blended into the cosmetic base are not particularly limited, but include extender pigments, inorganic white pigments, inorganic colored pigments, organic pigments, and organic powders. Q-ol agents etc. can be used, specifically, talc, kaolin, mica, magnesium carbonate, calcium carbonate, magnesium silicate, magnesium aluminum silicate, silica, titanium oxide, zinc oxide, red iron oxide, yellow oxide. Iron, black iron oxide, black pepper, pepper, tar pigment, nylon powder, ? Liethylene powder, methyl methacrylate powder,
Styrenno Q Uda? Litetrafluoroethylene no Q
Examples include powder, powder, crystalline cellulose, starch, titanium mica, titanium iron oxide, and bismuth oxychloride.

One or more of these cosmetic powders may be selected and used depending on the purpose of cosmetic use, and may also be blended by subjecting them to a known surface coating treatment.

The oil-based cosmetic of the present invention is produced by first heating and dissolving the silicone composition obtained as described above with another oil agent such as a solid oil agent, and then mixing it with powder that has been mixed and crushed in advance and milling it in a roll mill or the like. It is prepared by uniformly dispersing it, heating and melting it again, filling it into a container, cooling it and molding it.

The amounts of each of the above-mentioned components in the thus obtained solid cosmetic of the present invention are preferably as follows per final product concentration.

High viscosity silicone α1~20% by weight Low viscosity silicone oil 20~93% by weight Solid oil 2
-40% by weight of the powder body 5-60% by weight If the content is within the above range, the effects of the present invention can be fully achieved. If there is too little high viscosity silicone, you will not be able to feel the smooth spread or smoothness when applying, and if there is too much high viscosity silicone, the spread will be slow and the solubility in oil will be poor. Also, if the low viscosity silicone oil is too small, the proportion of high viscosity silicone will increase, making it difficult to blend.

Furthermore, if there is too little solid oil, the product will flow out or lose its shape during use, making it difficult to use.On the other hand, if there is too much solid oil, the product will shrink more when solidified, and will be too hard, resulting in less stickiness during application. .

Furthermore, if there is too little cosmetic powder, no makeup effect can be expected, and if there is too much cosmetic powder, the powder will become flaky and spread poorly.

In addition to the above-mentioned essential ingredients, the oil-based cosmetic of the present invention may contain fragrances within a range that does not impede the effects of the present invention.

Preservatives, ultraviolet absorbers, surfactants, antioxidants, polymer compounds, oils, skin beautifying ingredients, etc. can be added.

[Example] - Next, the present invention will be explained in more detail with reference to Examples.

Example 1 An oil-based foundation was prepared according to the composition shown in Table 1. The obtained oil-based foundation was subjected to sensory evaluation regarding its feeling of use and makeup retention. The results are shown in Table 2.

(Composition) Below is the margin * Degree of polymerization 3. o o o~Z000 initial molecular weight 2.
300 (Production method) Step A: High viscosity silicone is dissolved in low viscosity silicone oil.

Step B: The mixture obtained in Step A and the oil agent are dissolved by heating.

Step C: The mixture obtained in Step B and the pre-mixed and pulverized powder are mixed and uniformly dispersed using a roll mill.

Step D=The mixture obtained in Step C is heated and melted, and after defoaming is filled into a container, cooled, and molded.

Evaluation criteria in Table 2: ◎ Very good ○ Good △ Slightly poor × Bad As is clear from the results in Table 2, products 1 to 3 of the present invention spread smoothly when applied, have a rich flavor, and have good bonito flakes. It had an excellent feel and had good makeup retention. On the other hand, when high viscosity silicone is not used (comparative product 1.
3) had poor smoothness during application, lacked richness, and was unsatisfactory in terms of how well it settled and how well the makeup lasted. Even when a product with approximately the same viscosity as Inventive Product 3 was prepared using only low-viscosity silicone oil without using high-viscosity silicone (Comparative Product 3), similar results were obtained. Also, is it highly viscous?
When Livten was added (comparative product 2), the comfort level during application was improved, but it did not spread smoothly, lacked richness, and had a slightly inferior make-up retention.

Example 2 Stick lipstick (composition) Table 3 (Manufacturing method) Step A: (Mix and dissolve 11 to (3).

Step B: Add (4) to (6) to the mixture obtained in Step A and dissolve by heating.

Step C: Add (7)m (8) to the mixture obtained in Step B and uniformly disperse with a roll mill.

Step D: Pour into a defoamed stick mold, cool and mold.

Table 4 Evaluation Criteria ◎: Very good ○: Good Δ: Slightly poor ×: Bad The product of the present invention and comparative product 4 had very good compatibility when the oily component was heated and dissolved. Comparative product 5 (Example 3 of JP-A No. 60-248604)
) has poor compatibility between the silicone composition and the solid oil;
- Part of the sample remained undissolved. Furthermore, as is clear from the results in Table 4, the products of the present invention also have the following properties after molding:
The stick spread smoothly when applied, had a rich texture and settled well, had good release properties from the container, and was very glossy. On the other hand, Comparative Product 4 had poor smoothness during application, lacked richness, and was slightly inferior in settling. Comparative product 5 had poor mold releasability from the container, and crystals of unmixed solid oil appeared on the surface of the stick, causing problems in terms of appearance. Furthermore, it did not have a smooth spread or richness.

Example 3 Oil-based ointment type foundation (composition) Methylphenyl? Resiloxane 3t5 (%)
Zomethyl? Resiloxane (5es) 14 Silicone KE-76BS 15 Ceresin Wax 7 Fluid Q Rough-in 14 Titanium Oxide
20 Bengala
α7 yellow iron oxide 24 black iron oxide 0.3 talc
3.3 Mica titanium 3.3 (Production method) Prepared according to Example 1.

The obtained product of the present invention spread smoothly when applied, had a rich texture, set well, and had good makeup retention.

Actual example 4 Stick-shaped foundation (composition) Methylphenyl? Resiloxane 1α9 (%
) Zomethyl? Resiloxane (5cm) 2
14 Silicone T8IC-200 people *16 NoQ rough-in wax 1&8
Sorbitan sesquioleate 0.3 titanium oxide 36 red iron oxide
1.2 Yellow iron oxide
4.3 Black iron oxide 0.5 Talc.

Mica titanium 6 Degree of polymerization: 7.000 to 9.000 (Manufacturing method) Prepared according to Example 2.

The obtained product of the present invention applied smoothly and had a rich texture, settled well, and had good makeup retention. Moreover, the mold release from the inner wall of the container was good.

Example 5 Stick-shaped eyeshadow (composition) Methylphenyl moromi siloxane 40 (%)
Tecamethyl cyclopentasiloxane 2 Silicone KE-76BS 0.5 no Q rough-in wax 15 Candelilla wax
1 Squalane
1 Sorbitan sesquioleate 0.5 Iron mica titanium oxide 35 Blue No. 404 0.25 Talc
4.75 (Production method) Prepared according to Example 2.

The obtained product of the present invention spreads smoothly when applied to the eyelids,
It had a rich texture and settled well, and had good release properties from the inner wall of the stick container.

Example 6 Stick-shaped cheek beni-23 = (Composition) Methylphenyl? Resiloxane 5 (%
) Zomethyl? Resiloxane (5cs)
4B silicone KE-76BS
12? Liethylene wax
15 Guirou 2
Neopentyl glycol zoisooctanoate 3 red 2
No. 26 02 Yellow No. 401
0.1 talc
5.7 mica titanium
4 Nylon No Q Wooder 5
(Production method) It was prepared according to Example 2.

The obtained product of the present invention spread smoothly when applied, had a rich texture, and was excellent in settling down. Moreover, the mold releasability from the inner wall of the stick container was also good.

〔Effect of the invention〕

As detailed above, the present invention uses high viscosity silicone and combines it with low viscosity silicone oil to form a silicone composition, and by selecting a solid oil that is compatible with the silicone composition, it is possible to We were able to provide an oil-based cosmetic that spreads smoothly, has a rich texture, and has an excellent feel, which was not satisfied with mold cosmetics or simply blending low-viscosity silicone oil with them. It is. Furthermore, when molded into a stick shape, it has good releasability from the container and has an excellent glossy appearance.

that's all Applicant: Kobayashi Kose Co., Ltd.

Claims (1)

[Claims] 1. It is characterized by containing a silicone composition comprising a high viscosity silicone and a low viscosity silicone oil, a cosmetic base comprising a solid oil agent compatible with this silicone composition, and a cosmetic powder. oil-based cosmetics.