JP3276737B2 - Oily solid cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oily solid cosmetic, and more particularly, to an oily solid cosmetic which contains a monohydric alcohol having a specific melting point, is excellent in shape retention, and has excellent stability over time and a feeling of use. About charges.

[0002]

2. Description of the Related Art Heretofore, as a solid oily cosmetic, an oily solid comprising a liquid oil for cosmetics and a wax such as paraffin, in which a cosmetic component such as a pigment is dispersed, has been used. Such oily solid cosmetics were inferior in strength and stability, and were not satisfactory in dispersibility of pigments and the like.

[0003] Therefore, the strength of these solid oily cosmetics,
For the purpose of improving performance such as stability and pigment dispersibility, compounding of synthetic polyethylene wax and vegetable wax has been performed, but the effect is still not enough,
Higher performance was required.

On the other hand, various vegetable waxes, animal waxes and the like have been used for the purpose of improving the strength and stability of oily solids or the dispersibility of pigments. In fact, it is difficult to constantly obtain required performance because of problems such as impurities and impurities.

Conventionally, alcohols having a high melting point used in cosmetics include cetanol (melting points of 46 to 55).
C), stearyl alcohol (54-61 ° C.), behenyl alcohol (65-73 ° C.), etc., but the oily solid cosmetics containing these were inferior in strength and stability and were not satisfactory.

[0006]

Accordingly, it is desired to develop an oily solid cosmetic which has appropriate strength, excellent shape retention, high stability over time and pigment dispersibility, and a good feeling in use. Was rare.

[0007]

Under such circumstances, the present inventors have conducted intensive studies. As a result, by adding a monohydric alcohol having a melting point within a specific range, the strength and oil separation resistance are dramatically improved. It has been found that an oil-based solid cosmetic having improved stability and dispersibility of a pigment can be obtained, and the present invention has been completed.

That is, the present invention relates to (A) the melting point of 75 to 1
It is to provide an oily solid cosmetic containing a monohydric alcohol at 20 ° C.

Incidentally, in the present invention, the solid is defined as a normal temperature (15
２５25 ° C.) at normal pressure and without fluidity.

The monohydric alcohol of the component (A) in the present invention has a melting point of 75 to 120 ° C, preferably 75 to 110 ° C.
belongs to. If the melting point of the monohydric alcohol is less than 75 ° C., the solidification power is inferior, and the shape of the product cannot be maintained.

The monohydric alcohol of the component (A) has a melting point of 75 to 120 ° C., and may be a saturated or unsaturated linear, branched or cyclic monohydric alcohol. Long chain alcohols in the range of ~ 1000 are used. Among these, a saturated straight-chain long-chain alcohol is particularly preferable, for example, UNILIN 350 (melting point 7).
8 ° C), UNILIN 425 (melting point 91 ° C), UNI
LIN 550 (melting point 99 ° C), UNILIN 700
Commercial products such as (melting point 105 ° C.) (all manufactured by Petrolite) can be used.

The effects of the present invention can be improved by further blending a saturated hydrocarbon having a melting point of 50 to 120 ° C. as the component (B) with the oily solid cosmetic of the present invention. The mechanism of this action is not necessarily clear, but the addition of the monohydric alcohol of the component (A) and the saturated hydrocarbon of the component (B) enhances the adhesiveness between the waxes and the affinity for particles such as pigments. Is considered to be one of the reasons.

The saturated hydrocarbon of the component (B) has a melting point of 50 to 50.
The temperature is 120 ° C, preferably 60 to 100 ° C. If the melting point of the saturated hydrocarbon is less than 50 ° C., the solidification power is inferior, so that the shape of the product cannot be maintained.

As the saturated hydrocarbon as the component (B), any of natural and synthetic products can be used as long as it has a melting point of 50 to 120 ° C., for example, paraffin wax, polyethylene wax, ethylene propylene Copolymers, microcrystalline wax, ceresin, ozokerite, Fischer-Tropsch wax and the like are preferred. In the present invention, among these components (B), those having a melting point equal to or lower than the melting point of the monohydric alcohol of the component (A) to be actually blended are appropriately selected and used, so that sufficient strength and strength can be obtained. It is preferable from the viewpoint of obtaining stability over time.

In the oil-based solid cosmetic composition of the present invention, the component (A) should be used in an amount of 0.1 to 50% by weight in order to obtain appropriate strength, excellent stability over time, pigment dispersibility, and feeling during use.
(Hereinafter simply indicated by%), particularly preferably 1 to 30%,
The blending amount of the component (B) is preferably 3 to 50%, particularly preferably 5 to 30%, and the total blending amount of the component (A) and the component (B) is preferably 3.1 to 50%.

The oil-based solid cosmetic of the present invention includes, in addition to the above essential components, oils used in ordinary solid oil-based cosmetics,
Waxes, powders, pigments, dyes, polymer compounds, fragrances, surfactants, antioxidants, preservatives, cosmetic ingredients, and the like can be appropriately compounded within a range that does not impair the effects of the present invention.

The oily solid cosmetic of the present invention may contain, in addition to the above-mentioned components, oily raw materials other than the component (B) which are solid, semi-solid or liquid at ordinary temperature. Examples of solid or semi-solid oily raw materials other than the component (B) include mocro, hardened tallow, carnauba wax, candelilla wax, rice wax, beeswax, hardened jojoba oil, lanolin, and petrolatum. Examples of oily raw materials that are liquid at ordinary temperature include hydrocarbons such as liquid paraffin, liquid isoparaffin (liquid polyisobutylene), and squalane; natural animal and vegetable oils such as olive oil and jojoba oil; silicone oils such as dimethylpolysiloxane; And synthetic ester oils such as state.

The above-mentioned oily raw materials may be used alone or in combination of two or more, and the compounding amount thereof is preferably 1 to 95%, particularly preferably 30 to 90%, in the cosmetic of the present invention.

The oily solid cosmetic of the present invention can contain pigments usually used in cosmetics, depending on the use. Specific examples include extenders such as talc, sericite, mica, kaolin, silica, nylon powder, polyethylene powder, and cellulose powder; carbon black, titanium oxide, iron oxide, zinc oxide, ultramarine,
Coloring agents such as navy blue, chromium oxide, organic tar dyes and lakes; and composite pigments such as titanium mica and iron oxide coated mica. In addition, those obtained by subjecting these cosmetic pigments to surface treatment with silicone, higher fatty acid, higher alcohol, fatty acid ester, metal soap, amino acid, alkyl phosphate or the like can also be used.

The compounding amount of the above pigment is preferably 0.1 to 95%, particularly preferably 0.1 to 70% in the cosmetic of the present invention, and in the case of lipstick, 0.1 to 50%. Is preferred.

The oily solid cosmetic of the present invention can be produced from the above-mentioned components according to a conventional method, and the dosage form is not particularly limited, and various shapes of lipsticks are poured into sticks, plates, and dishes. , Eye shadow, eyebrows and the like.

[0022]

The oil-based solid cosmetic of the present invention has moderate strength, excellent shape retention, high temporal stability and pigment dispersibility, and a good feeling in use.

[0023]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the invention thereto.

Example 1 Lipsticks having the compositions shown in Table 1 were prepared in accordance with the following production methods, and each of them was evaluated for use feeling, oil separation method and pigment dispersibility by the following test methods. Table 2 shows the results.

[0025]

[Table 1]

(Preparation method) The base material is heated and melted and mixed uniformly. The coloring material is added to the mixture, and the mixture is uniformly dispersed by kneading with a roll mill, then re-melted, defoamed, poured into a mold, quenched, and solidified. The solidified material was removed from the mold and filled in a container.

(Test method) (1) Feeling of use: Ten specialized panelists used each lipstick, and the sensory evaluation of the feeling of use was performed. (2) Oil separation resistance: Oil separation resistance was visually evaluated after each lipstick was stored in a thermostat at 35 ° C. for one week. (3) Pigment dispersibility: A part of each lipstick was scraped off, and the dispersion state of the pigment was observed with an optical microscope.

[0028]

[Table 2]

Example 2 A yellowtail having the composition shown in Table 3 was prepared according to the following method.
Each of them was evaluated by the same test method as in Example 1 to evaluate the usability, oil separation resistance and pigment dispersibility.
Table 4 shows the results.

[0030]

[Table 3]

(Preparation method) Raw materials other than pigments are heated and melted and uniformly mixed. The pigment was added thereto, mixed well, kneaded with a roll mill, uniformly dispersed, then cooled and extruded from a nozzle having an inner diameter of 3 mm by a squeeze injection machine.

[0032]

[Table 4]

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61K ^7/ 00-7/50

Claims (5)

(57) [Claims] 1. An oily solid cosmetic comprising (A) a monohydric alcohol having a melting point of 75 to 120 ° C. 2. The oily solid cosmetic according to claim 1, further comprising (B) a saturated hydrocarbon having a melting point of 50 to 120 ° C. 3. The oil-based solid cosmetic according to claim 2, wherein the saturated hydrocarbon as the component (B) is paraffin wax, polyethylene wax, ethylene propylene copolymer, microcrystalline wax, ceresin, ozokerite or Fischer-Tropsch wax. 4. The melting point of the saturated hydrocarbon of the component (B) is lower than the melting point of the monohydric alcohol of the component (A).
Or the oil-based solid cosmetic according to 3. 5. The method according to claim 1, wherein the monohydric alcohol of component (A) is 0.1 to 0.1%.
50% by weight and 3 to 50% by weight of a saturated hydrocarbon of the component (B), and the total of the components (A) and (B) is 3.
The oily solid cosmetic according to any one of claims 2 to 4, which is 1 to 50% by weight.