JP2670812B2 - Liquid cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to a liquid cosmetic composition comprising an aqueous phase and an oil phase.

[Conventional technology and its problems]

Conventionally, emulsion type, solubilizing type, and multi-layer type cosmetics are known as liquid cosmetics comprising an oil phase and an aqueous phase. Among them, the emulsified type and solubilized type cosmetics are usually prepared by a method of dispersing an oil phase in an aqueous phase with a surfactant or a method of dispersing an aqueous phase in an oil phase, The multi-layer cosmetic is used by mixing the separated layers by shaking when used.

However, these liquid cosmetics have the following drawbacks, for example. That is, since the emulsifying type and solubilizing type cosmetics use a surfactant, there is a problem of skin irritation, and the surfactant has to be properly selected in order to obtain a stable product.

On the other hand, since the multilayer cosmetic does not use a surfactant, there is no problem as described above, but there is a drawback that the container must be shaken after each use.

In addition, paying attention to the property of the powder to orient at the water-oil interface, a dispersion-type cosmetics using powder has been developed, which obtains a long-term stable system of water-oil without using a surfactant. ing.

However, the above-mentioned dispersion type cosmetic composition has a problem in that it is difficult to obtain a cosmetic composition that satisfies the moisturizing feeling and the dry feeling of the cosmetic material at the same time and has good stability. That is, in the dispersion type cosmetics, in order to give a feeling of dryness, methods such as decreasing the amount of oil agent, adding alcohol, increasing the amount of powder, etc. are taken, but the amount of oil agent is decreased, If you add alcohol,
There is a drawback that a moisturizing feeling cannot be obtained, and there is a drawback that when the amount of powder is increased, the spread becomes heavy.

On the other hand, if the amount of the oil agent is increased to give a moisturizing feeling, not only a dry feeling is not obtained, but, for example, when a dispersion-type cosmetic is used as a base cosmetic, a foundation etc. However, there was a drawback in that it deteriorated the makeup lasting effect (especially the oiliness over time).

Therefore, without using a surfactant, the oil phase can be stably dispersed in the water phase for a long period of time, and can give a feeling of use such as a dry feeling and a moisturizing feeling together. Was desired to be developed.

[Means for solving the problem]

The present inventors have conducted extensive studies on powders, additive components, and the like to be incorporated in dispersion-type cosmetics. As a result, hydrophobic powders are used as powders and cross-linked polyacrylic polymer compounds are used in the aqueous phase. It has been found that a cosmetic material that solves the above problems can be obtained by using it, and the present invention has been completed.

Therefore, according to the present invention, a hydrophobic powder and a volatile oil agent are used.
The liquid cosmetic composition is characterized in that a mixture with an oil agent containing 90 to 90% by weight is dispersed in an aqueous phase containing a cross-linked polyacrylic polymer compound.

The hydrophobic powder used in the present invention includes a hydrophobic powder which is itself hydrophobic and a hydrophobic treatment powder obtained by subjecting a non-hydrophobic powder to a hydrophobic treatment. Examples of the hydrophobic powder include hydrophobic silica, silicone resin powder, nylon powder, polyethylene powder, methyl methacrylate powder, styrene powder, polytetrafluoroethylene powder and the like. Examples of the hydrophobized powder include talc, kaolin, mica, calcium carbonate,
Hydrophobicized powders of magnesium carbonate, magnesium silicate, magnesium aluminum silicate, hydrophilic silica, titanium oxide, zinc oxide, titanium mica, iron mica titanium oxide, bismuth oxychloride, silk powder, crystalline cellulose and the like can be mentioned. To be The hydrophobic treatment is
The surface of the powder is treated with silicone or another oil agent. Specifically, the powder and the treatment agent are mixed, or the treatment agent is sprayed on the powder, and if necessary, obtained by these methods. Heating or baking the treated powder,
It is carried out by a method usually performed.

Among the above hydrophobic powders, nylon powders or hydrophobic powders of hydrophilic silica or the like can be used to obtain those having good stability and cosmetic durability. Further, if spherical powder is used, it is possible to obtain a product that spreads well and is excellent in usability.

In the cosmetic of the present invention, as an oil agent, squalane,
Hydrocarbons such as liquid paraffin, dimethylpolysiloxane, silicone oil such as methylphenylpolysiloxane, glyceryl trioctanoate, castor oil, olive oil, avocado oil, palm oil, safflower oil, sunflower oil, cacao oil and other oils and fats, Isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, 2
Examples thereof include ester oils such as cetyl ethylhexanoate and isocetyl stearate, volatile oil agents such as cyclic silicon, chain silicon and low boiling point hydrocarbons. Further, if a volatile oil agent is added to the oil agent, a cosmetic having a dry feeling and a good feeling in use can be obtained without stickiness, which is particularly preferable. When the volatile oil agent is mixed in the oil agent, the amount of the volatile oil agent is preferably in the range of 10 to 90% in the oil agent.

The preferred mixing ratio of the hydrophobic powder and the oil agent in the cosmetic of the present invention is in the range of 1: 1 to 1:10, and the compounding amount of these mixtures in the cosmetic is 1 to 30% by weight (hereinafter simply referred to as “%”).
It is preferable to set it as the range of.

On the other hand, the cross-linked polyacrylic polymer compound contained in the aqueous phase is a water-soluble alkali thickening polymer that forms a gel by neutralizing with an alkali agent, and is a carboxyvinyl polymer or a salt thereof. It is illustrated.
Examples of the neutralizing alkaline agent used for gelation include inorganic / organic bases such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, triethanolamine and L-arginine.

The amount of the cross-linked polyacrylic polymer compound added to the water phase is preferably such that the viscosity of the water phase is in the range of 600 to 100,000 cs, which is about 0.1 to 1.0% based on the final product. If the amount of the cross-linked polyacrylic polymer compound is too small, the dispersion stability of the oil phase will be insufficient, and if it is too large, there will be a problem that the feel will be poor. The crosslinked polyacrylic polymer compound may be gelled before being added to the system, or may be gelled in the system by adding an alkaline agent after the gelation.

The cosmetics of the present invention include white / exterior / coloring pigments, pearlescent agents, surfactants, moisturizers, as long as the effects thereof are not impaired.
Preservatives, fragrances and other various additives can be appropriately selected and added.

The thus obtained cosmetic of the present invention can be used as a lotion, a beauty essence, a base cosmetic, etc. by itself, and is also useful as a base material for liquid cosmetics. It can be used as a makeup product such as a dish.

Particularly, in the cosmetic of the present invention, preferable results are obtained when the hydrophobic powder is a porous powder and the cosmetic is a base cosmetic.

〔Example〕

 Next, the present invention will be described in more detail with reference to examples.

Example 1 A cosmetic was prepared with the composition shown in Table 1 below, and its stability was investigated. The results are also shown in Table 1.

(Preparation method) Step A: An oil agent and powder are mixed.

Step B: A crosslinked polyacrylic polymer compound is dissolved in purified water.

Step C: Disperse the mixture of Step A into the solution of Step B.

Step B: An alkaline agent is added to the dispersion liquid of Step C for neutralization.

(Stability evaluation criteria) ○ Disperse.

× Separated immediately after production.

Example 2 A base cosmetic material of the present invention was prepared, and sensory evaluation was performed on its feeling of use and makeup lasting effect (effect of preventing makeup damage), and the results were compared with conventional products. Table 2 shows the results.

Formulation and production method of the product of the present invention: (Formulation) (% by weight) (1) Carboxyvinyl polymer 0.23 (2) Methylcellulose 0.05 (3) Carrageenan 0.04 (4) Purified water balance (5) Squalane 5.0 (6) Decamethylcyclo Pentapolysiloxane 5.0 (7) Silicon-treated spherical porous silica ^* (silica beads) 4.0 (8) Sodium hydroxide (1% aqueous solution) 6.9 (9) Purified water 3.1 * Coating treatment with dimethylpolysiloxane (100cs) (Production method) ) Step A: Dissolve (1) to (3) in (4).

Step B: (5) to (7) are mixed and dispersed in the solution obtained in A.

Add (8) and (9) to the dispersion of step C: B.

Formulation and manufacturing method of comparative product: (Formulation) (% by weight) (1) Stearic acid 1.0 (2) Glycerin monostearate 0.5 (3) Cetanol 1.0 (4) Squalane 5.0 (5) Decamethylcyclopentapolysiloxane 5.0 ( 6) Polyoxyethylene sorbitan monooleate (20E.O.) 0.6 (7) Sorbitan sesquioleate 0.3 (8) 1,3-butylene glycol 15.0 (9) Sodium hydroxide (1% aqueous solution) 15.0 (10) Spherical Porous silica (silica beads) 4.0 (11) Carboxyvinyl polymer 0.23 (12) Methylcellulose 0.05 (13) Carrageenan 0.04 (14) Remaining purified water (Preparation method) The usual method was used.

result: As described above, the base cosmetics of the present invention have a good transparency, excellent appearance, good dispersion stability, spreadability at the time of application, and no stickiness as compared with those conventionally provided. It had a refreshing feeling of use. Also, it was intended to improve the moisturizing effect of the cosmetic material applied above.

Example 3 Liquid formula (formulation) (% by weight) (1) Carboxyvinyl polymer 0.16 (2) Methylcellulose 0.05 (3) Carrageenan 0.04 (4) Purified water balance (5) Squalane 5.0 (6) Decamethylcyclo Pentapolysiloxane 5.0 (7) Silicon-treated spherical silica 4.0 (8) Titanium oxide 7.6 (9) Color pigment 1.4 (10) Lecithin 0.3 (11) Sorbitan sesquioleate 0.2 (12) Polyoxyethylene sorbitan monooleate (20E) .O.) 0.2 (13) 1,3-butylene glycol 7.3 (14) Sodium hydroxide (1% aqueous solution) 4.8 (15) Purified water 5.2 * Coating with 20% dimethylpolysiloxane (100cs) (process) A: (1) to (3) are dissolved in (4).

Step B: Mix (5) to (7).

Step C: (8)-(13) are mixed and stirred and added to the mixture of A.

Step D: Disperse the solution of B in the mixture of C.

Add (14) and (15) to the dispersion of step E: D.

The liquid foundation obtained as described above has good dispersion stability, spreads well at the time of application, has no stickiness, and has a crisp feel, and has a makeup lasting effect. Was also good.

〔The invention's effect〕

 The above-mentioned cosmetic of the present invention has the following features.

(1) Since it is not necessary to use a surfactant, there is no problem such as skin irritation, and a highly safe product can be obtained.

(2) A transparent product having an excellent appearance can be obtained.

(3) The dispersion stability is extremely good.

(4) It has no stickiness, has a dry feel, and has a good feeling in use.

(5) Stable over a long period of time.

In addition, when a porous powder is used as a powder to be blended in the present cosmetic material and used in combination with a volatile component, it is possible to suppress the oil shine over time, prevent makeup loss, and improve the makeup lasting effect. To be

Further, if spherical powder is used as the powder, the effect of improving spreadability can be obtained.

Claims (1)

(57) [Claims] 1. A mixture of a hydrophobic powder and an oil agent containing 10 to 90% by weight of a volatile oil agent is dispersed in an aqueous phase containing a cross-linked polyacrylic polymer compound. Liquid cosmetics.