JPH0543419A - Composition for external use - Google Patents

Abstract

PURPOSE:To provide a composition for external use, having transparency, high structural viscosity and excellent shape-retainability, giving comfortable feeling to the skin, free from oozing of silicone oil with time, having high stability and useful as a cosmetic, pharmaceutical agent for external use, etc. CONSTITUTION:The external agent composition having the above effects can be produced by compounding (A) a dialkylphosphoric acid polyvalent metal salt expressed by formula I (R<1> and R<2> are 8-36C, preferably 12-22C hydrocarbon group; M is n-valent metal ion such as aluminum ion, calcium ion or iron ion; n is 2 or 3), (B) a benzoic acid ester of formula II (R<3> is 8-17C hydrocarbon group) and (C) a silicone oil, preferably a low-viscosity silicone oil, especially an oil having a viscosity of <=50cs or thereabout as a lubricant. The weight ratios A:B:C are preferably 1:(1-100):(1-100) and the concentration of the component A in the composition is preferably 0.1-10wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for external use, more specifically, a gel-like, shape-retaining composition in which a small amount of a polyvalent metal salt of dialkylphosphoric acid and a benzoic acid ester are mixed with a silicone oil which is an oil agent. TECHNICAL FIELD The present invention relates to an external preparation composition having excellent properties, a good feeling in use, and high stability.

[0002]

BACKGROUND OF THE INVENTION In external compositions such as cosmetics and pharmaceuticals, oil agents have been applied in various shapes. Among them, wax-like wax bases are lipsticks, oily foundations, point care sticks, eyeliners,
Used for eyebrow etc. As the wax base, a liquid oil / solid fat mixture having a solid appearance obtained by melting and mixing a liquid oil such as a hydrocarbon oil or an ester oil and a solid fat is generally used.

However, since this wax base contains a large amount (20 to 30% by weight) of a solid component, it has a large elongation and is disadvantageous in that it is sticky, and a good feeling cannot be obtained.

Therefore, in recent years, for the purpose of solving this problem, a small amount (1 to 5% by weight) of a dialkylphosphoric acid polyvalent metal salt or the like is used as a waxing agent to form a liquid oil such as a hydrocarbon oil or an ester oil. A wax base that is solidified and has good elongation is manufactured (Japanese Patent Publication No. 1-41222).

On the other hand, recently, there is a tendency that a smoother feel is required for a base of an external preparation composition, and a silicone oil is added to an emulsified composition instead of a usual hydrocarbon oil or ester oil. became. Accordingly, various attempts have been made to add silicone oil to the wax base, but it is not stable even if solid oil or polyvalent dialkylphosphoric acid metal salt is mixed with silicone oil. Outflow occurred, and no external preparation containing a satisfactory silicone oil was obtained.

[0006]

Therefore, the development of a composition for external use, which has a smooth feeling of use, which is an excellent characteristic of silicone oil, has good elongation, is excellent in shape retention, and has high stability, has been developed. Was wanted.

[0007]

Under such circumstances, as a result of intensive studies by the present inventors, when a specific benzoic acid ester is used in combination with a polyvalent metal salt of dialkylphosphoric acid and silicone oil, it is transparent and high. It has been found that a silicone gel composition having a structural viscosity, stable, and good in use feel can be produced, and based on this finding, the present invention has been completed.

That is, the present invention comprises the following components (A),
(B) and (C) (A) The following general formula (1)

[0009]

[Chemical 3]

[Wherein, R ¹ and R ² represent a hydrocarbon group having 8 to 36 carbon atoms, M represents a metal ion having a valence of n, and n represents 2 or 3] Polyvalent metal salt (B) The following general formula (2)

[0011]

[Chemical 4]

A composition for external use containing a benzoic acid ester (C) silicone oil represented by the formula: wherein R ³ represents a hydrocarbon group having 8 to 17 carbon atoms is provided.

The component (A) polyalkyl dialkylphosphate salt used in the present invention is a known compound.
It can be manufactured according to the method described in Japanese Patent No. 41122.

In the formula (1), the hydrocarbon group represented by R ¹ and R ² has a carbon number of 8 to 36.
Those having a carbon number of up to 22 are preferable, and those having a small carbon number cannot give sufficient gel strength to fats and oils. Preferred hydrocarbon groups include, for example, octyl, nonyl, decyl, dodecyl, undecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl, tetracosyl, pentacosyl, hexacosyl, heptacosyl, octacosyl, Nonacosyl, triacontyl, hentriacontyl, dotriacontyl, octenyl, nonenyl, decenyl, dodecenyl, undecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, nonadecenyl, cocenyl, tetracenyl, coconyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, docosenyl, dodecenyl Octacocenyl, Nakoseniru, thoria Conte nil, strange thoria Conte nil, de thoria Conte nil, octadienyl,
Nonadienyl, decadienyl, dodecadienyl, undecadienyl, tridecadienyl, tetradecadienyl,
Pentadecadienyl, hexadecadienyl, heptadecadienyl, octadecadienyl, nonadecadienyl, eicosadienyl, heneicosadienyl, docosadienyl, tricosadienyl, tetracosadienyl, pentacosadienyl, hexacosadienyl, peptaco Sadienyl, octacosadienyl, nonacosadienyl, triacontadienyl, hentriacontadienyl, dotriacontadienyl, 2-hexyldecyl, 2-octylundecyl, 2-decyltetradecyl, 2-undecylhexadecyl , 2-tetradecyl octadecyl group and the like.

Further, as the metal ion represented by M,
Examples thereof include aluminum ion, calcium ion, iron ion, and the like, and polynuclear aluminum ion may be used.

The benzoic acid ester as the component (B) used in the present invention is a known liquid oil. In the formula (2), specific examples of the hydrocarbon group represented by R ³ include those having 8 to 17 carbon atoms among the above hydrocarbon groups.

The component (B) in the present invention may be a single R ³ or a mixture of R ^3's having different R ^3. Examples of the mixture include FIN.
Product name "FINSOLV T" from TEX (USA)
What is manufactured and sold as "N" can be used. In the formula (1), R ³ having about 12 carbon atoms is about 30% by weight, one having 13 carbon atoms is about 40% by weight, one having 14 carbon atoms is about 20% by weight, and one having 15 carbon atoms is about 30% by weight. About 1
It contains 0% by weight.

The component (C) silicone oil used in the present invention is not particularly limited,
A low-viscosity silicone oil is preferable, and one having a viscosity of about 50 cs or less is particularly preferable. When the viscosity of the silicone oil becomes high, when it is blended in a large amount in the composition for external use, it becomes oily to the touch, which is not preferable in terms of use. Examples of such a low-viscosity silicone oil include low-polymerization chain-like dimethylpolysiloxane, methylphenylpolysiloxane, cyclic octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and the like. Two or more kinds can be appropriately selected and used.

The external composition of the present invention comprises the above-mentioned component (A),
The components (B) and (C) may be dissolved in each other and mixed in an amount ratio that forms a gel. In particular, the weight ratio of the component (A):
Component (B): Component (C) = 1: 1 to 100: 1 to 100
And the amount of the component (A) is 0.1 to 10% by weight.
Is preferred.

The external composition of the present invention may further contain other optional components usually used in external compositions in an amount of 0 to 40% by weight, as long as the effects of the present invention are not impaired. Other components include powders, moisturizers, intercellular lipids (ceramide, etc.), ultraviolet absorbers, alcohols,
Examples thereof include chelates, pH adjusters, preservatives, thickeners, emulsifiers, pigments, fragrances and medicinal ingredients.

Of these, an oily foundation can be obtained by blending the powder for external use composition of the present invention in an amount of 5 to 90% by weight, preferably 10 to 85% by weight. As the powder, powder generally used in cosmetics,
For example, extender pigments such as talc, mica, kaolin, sericite; inorganic pigments such as titanium oxide, zinc oxide, iron oxide, ultramarine blue; titanium mica-based pearl pigments; and organics such as blue 404 colors, red 202 and yellow 401 Mention may be made of pigments. In the present invention, one or more of the above powders are arbitrarily selected and used.

The topical composition for external use of the present invention is, for example, an essential component (A) component dialkylphosphoric acid polyvalent metal salt, (B).
It is prepared by heat-mixing the benzoic acid ester as a component, the silicone oil as the component (C), and other optional components as necessary, mixing them with, for example, a homomixer, homodisper, etc., and molding them into a predetermined shape. ..

In the composition for external use of the present invention, the silicone gel obtained as described above can be used as it is, or water and an emulsifier such as a modified silicone may be further added to prepare a W / O type or O / W type. It may be used as an emulsified composition.

The topical composition for external use of the present invention includes:
Examples include makeup cosmetics such as foundations and lipsticks, skin care cosmetics such as creams, emulsions and oil gel cleansings, hair cosmetics, and external medicines.

[0025]

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

Example 1 A composition for external use having the composition shown in Table 1 was prepared according to the following production method, and oil oozing was carried out by the following method.
The shape retention and the transparency were evaluated. The results are shown in Table 1.

(Production Method) Calcium dicetylphosphate salt of (1), benzoic acid ester of (4) and (2), (3),
The silicone oil of (5) was dispersed and mixed, and heated and melted at 80 to 90 ° C. Then, the mixture was thoroughly dispersed and mixed with a homogenizer, and again heated and melted to obtain a silicone gel composition.

(Evaluation of oil exudation and shape retention) When the silicone gel composition was stored at room temperature and oil bleeding was not observed, it was evaluated as ○, and when it was observed, the shape retention was visually observed. Observing, ○ is excellent, × is inferior
And

(Evaluation of Transparency) The silicone gel composition was stored at room temperature and visually observed. Very transparent ones were marked with ∘, transparent ones were marked with ○, translucent ones were marked with Δ, and opaque ones were marked with x. did.

[0030]

[Table 1]

From the results shown in Table 1, the composition for external use of the present invention containing a benzoic acid ester does not cause oil exudation, has good transparency, and is excellent in shape retention.

Example 2 To a mixture of 89 g of octamethylcyclotetrasiloxane and 10 g of benzoic acid ester (FINSOLV TN) was added 1 g of calcium dicetyl phosphate, and the mixture was mixed at 80 ° C.
After dissolving, mixing at 1000 to 1500 rpm, and leaving to cool, a gel-like external composition was obtained.

The composition for external use of the present invention had a high structural viscosity, was excellent in shape retention, was excellent in transparency, and did not cause oil exudation.

Example 3 (6) and (7) were added to a mixture of (1) to (5) having the following composition.
To (10) were added, and the mixture was heated and mixed at 70 to 100 ° C., and then (11) was added and allowed to cool to prepare an oily foundation.

The oil-based foundation of the present invention had a better spread on the skin than the comparative product, a good feel on use, and excellent shape retention and stability.

(Composition) Inventive product 7 Comparative product 2 (1) Liquid paraffin 22.9 16.3 (2) Methyl polysiloxane (6cs) 13.0 13.0 (3) Benzoic acid ester ^{* 3} 8.0 -(4) Squalane-14.6 (5) Beeswax 4.0 4.0 (6) Calcium dicetylphosphate salt 2.0 2.0 (7) Titanium oxide 45.9 45.9 (8) Red iron oxide 1.3 1.3 (9) Yellow iron oxide 2.5 2.5 2.5 (10) Black iron oxide 0.3 0.3 (11) Perfume 0.1 0.1 * 3: FINSOLLV TN was used.

[0037]

Industrial Applicability The external composition of the present invention has a high structural viscosity, an excellent shape retention property, a good feeling in use, and a high stability without exudation of silicone oil. It is also useful as cosmetics, external medicines and the like.

Claims (1)

[Claims] 1. The following components (A), (B) and (C) (A) The following general formula (1): [Wherein, R ¹ and R ² represent a hydrocarbon group having 8 to 36 carbon atoms, M represents a metal ion having a valence of n, and n represents 2 or 3]. Salt (B) The following general formula (2): A composition for external use containing a benzoate (C) silicone oil represented by the formula: wherein R ³ represents a hydrocarbon group having 8 to 17 carbon atoms.