JPS6147409A - Comsmetic of solubilized type - Google Patents

Abstract

PURPOSE:The titled cosmetic having solubilized a substance containing a lower alcohol even in a high concentration, obtained by using a specific solubilizer. CONSTITUTION:0.3-3wt% compound shown by the formula (R is 12-22C saturated or unsaturated straight-chain aliphatic alcohol residue; a is 13-35; b is 13-40; b>=a), a substance to be solubilized (e.g., oil-soluble effective component, various oily components, perfume, vitamins, etc.), and a lower alcohol are dissolved, and incorporated with a water phase, to give cosmetic of solubilized type. It is cosmetic having improved refreshing feeling, containing a lower alcohol in high concentration. The compound shown by the formula has a low melting point, is not crystallized even at low temperature, and provides a stable solubilized state. This compound has good oil release by the action of propylene oxide in the compound. It has high safety because of its large molecular weight.

Description

Detailed Description of the Invention The present invention uses a polyoxypropylene polyoxyethylene-adducted ether-type nonionic compound of higher saturated or unsaturated straight-chain aliphatic alcohol, and provides an excellent cooling sensation containing a high concentration of lower alcohol. This invention relates to dissolvable cosmetics.

Conventionally, solubilized cosmetics come in a wide variety of forms, including lotions, after-shape soaps, hair liquids, and body lotions. I was trying to model it. Typical solubilizers that have been used for this purpose include polyoxyethylene oleyl ether, polyoxyethylene nonylphenyl ether, holoxyethylene hexyldecyl ether, and holoxyethylene hardened castor. Non-ionic substances such as oil are central and have played a certain role.

However, at present, due to various sensual demands for cosmetics, such as providing a refreshing feeling suitable for summer use,
There is an increasing need to transparently solubilize substances to be solubilized not only in the aqueous phase but also in high concentration aqueous solutions of lower alcohols such as ethanol. However, although the various solubilizing agents mentioned above are generally effective in solubilizing the substance to be solubilized into the aqueous phase, the solubilization of the substance to be solubilized increases as the lower alcohol content in the aqueous phase increases. There is a drawback that the solubilization ability decreases, making it difficult to solubilize, or even if solubilization is possible, the transparency decreases.

As a result of intensive research, the present inventors have developed a novel solubilizer that can sufficiently solubilize the substance to be solubilized even if it contains a high concentration of lower alcohol by using a specific solubilizer. A dissolvable cosmetic was obtained.

That is, the present invention provides a compound t represented by the following general formula 〇)
This relates to a solubilized cosmetic characterized by containing -0.3 to 3% by weight.

RO (C, HsO) & (C meaning) fGO) bH (I) 1,
) Hereinafter, the configuration of the present invention will be described in detail.

The solubilizer applied to the present invention is an aliphatic alcohol polypropylene oxide polyethylene oxide ether compound represented by the general formula (I), among which R
represents a saturated or unsaturated linear aliphatic alcohol residue having 12 to 22 carbon atoms. The aliphatic alcohol that provides such an aliphatic alcohol residue is, for example, diuryl alcohol.

myristyl alcohol, cetanol, stearyl alcohol, behenyl alcohol, 11-fsenol-1,
12-) Various saturated and unsaturated straight chain aliphatic alcohols such as lysocenol-1, oleyl alcohol, lylyl alcohol, and lylyl alcohol can be mentioned. Here, in the case of a branched aliphatic alcohol, its solubilizing ability is lower than that of a straight chain aliphatic alcohol, and it is not preferred in the present invention. performance decreases.

In addition, a and b represent the average number of added moles of propylene oxide and ethylene oxide, respectively, and a is 13 to 3
5, b is in the range of 13 to 40, and b≧a.

When a is 12 or less, the melting point of the compound itself becomes high and it is not preferable to crystallize easily, and delathering in a lotion etc. becomes worse.On the other hand, when a is 36 or more, the solubilizing ability is insufficient. - When the number 1 is 12 or less or b (a), the hydrophilicity is insufficient and it is unsuitable for solubilization.On the other hand, when it is 41 or more, the hydrophilicity is too strong and the solubilization ability is insufficient.

Furthermore, it is important that the compounds according to the invention have a hydrophilic-lipophilic balance (HLB) in the range of 10 to 15, and under such conditions ethanol.

High concentration of lower alcohols such as Isobu C1 hanol (20
It is possible to sufficiently solubilize the substance to be solubilized to the same amount as the solubilizing agent even if it is in an aqueous solution containing 1) to 40% by weight.

In addition, the HLB value is sorbitol, tanmonostearate (HLBgfJ47) and polyoxyethylene ('2
0) Sorbitan monostebre,) CHLB value 14.
9) This is a value determined experimentally by emulsifying liquid paraffin based on t-standard. ...Next, in the present invention, one compound represented by the general formula (I) is blended into the cosmetic base in an amount of 0.3 to 23% by weight. 0
．． If the amount is less than 3% by weight, sufficient surface solubilizing power cannot be exhibited, and if it exceeds 3 gb, gelation may occur, which is not preferable for solubilized cosmetics.・In addition, the method for producing the solubilized cosmetic of the present invention is a conventional method, that is, the solubilizing agent and the substance to be solubilized are dissolved together with a lower alcohol, and an aqueous phase is added thereto. ' to obtain a solubilized cosmetic. The term "substances to be solubilized" as used herein refers to oil-soluble active ingredients such as various oils, fragrances, vitamins, etc. that can be commonly used in cosmetics, as described above.

Here, the features of the present invention will be described below.

α) Although this compound is a substance with a high molecular weight and a higher alcohol t-lipophilic group, it has a low melting point and a low temperature (5℃ However, it is possible to obtain a stable solubilized state without crystallization.

C2) Similarly, this compound has a well-balanced number of additional moles of propylene oxide groups and ethylene oxide groups in its molecular structure, so it is able to stably hold all lower alcohols. As a result, sufficient solubilization ability is fully exhibited even in a highly concentrated lower alcohol aqueous solution system, and a cosmetic with a refreshing feel more than ever before can be provided.

(3) Second, due to the action of the propylene oxide group present in this compound, the resulting cosmetic has good foam removal properties.

(4) Furthermore, since this compound has a large molecular weight, it is also highly safe.

Next, in order to evaluate how superior the compound according to the present invention is in solubilizing ability, liquid paraffin and fragrance were selected as substances to be solubilized, and their potential was compared with conventional solubilizing agents. The solubility ability was confirmed.

Solubilization of liquid paraffin Polyoxypropylene (13
) polyoxyethylene (19) stearyl ether CC
sg H1170 (Cm H 0)xs (CmHaO
)t*H) and the conventional solubilizer polyoxyethylene (8) oleyl ether CCIs HasO(Ct'H
40) s H), the following tc formulation A (inventive product) and formulation B (comparative product) were prepared and their solubilized state was evaluated. The experiment was conducted by reducing the amount of purified water by the amount of ethanol added. In addition, the evaluation was carried out using a Hitachi 139 spectrophotometer - measuring the light transmittance in the visible light region and determining the quality of the solubilized state. The results are shown in Figure 1.

Prescription A Cts)fayoCCaLO)u(CmH+0)uH1
, 0% by weight liquid paraffin 0.5 ethanol θ~50 purified water
98.5-48.5 Prescription B C□a HawO (C*H40)aH 1.0% by weight liquid paraffin 0.5 Ethanol
0-50 purified water
98.5-48.50 Solubilization of fragrances Polyoxypropylene (13
) polyoxyethylene (30) stearyl ether (C
81 valence 0(C,H-〇)□(CmH+0)mH) and conventional solubilizers polyoxyethylene (50), hydrogenated castor oil (HCO-50) and polyoxyethylene (8)
Oleyl ether (C1s Hsw O (Cm HaO
)s H), the following formulation C (product of the present invention) is prepared.
, Formulation D (Comparative Product I) and Formulation E (Comparative Product ■) were prepared, and their solubilization states were evaluated. Experiments and evaluations were conducted in the same manner as for liquid paraffin. The results are shown in Figure 2.

Prescription C.

css 'Ha'I O(CB Ha O)1B ((
4H40), H1,0% by weight fragrance 0
・3 Isopropanol θ~50 purified water
98.7-48.7 Prescription D HCO-50 1,0 weight - Fragrance 0.3 Isopropatol 0-50 Purified water 98.7-48.7 Prescription E C1-10 CClH40) IIH1,0 weight-1 fragrance
0.3 Isopropanol θ~50 Purified water
9&7~48.7 As is clear from the results in Figures 1 and 2, in solubilizing liquid paraffin, the product of the present invention (formulation A) has a good solubilization state up to an ethanol content of 40% by weight. In the comparative product (formulation B), the light transmittance was significantly lowered at an ethanol content of 20% by weight, and the solubilization ability was lowered. On the other hand, in the solubilization of fragrances,
The product of the present invention (formulation C) has an isopropanol content of 40% by weight.
The solubilization state is good up to 1. Comparative product 1. In case of n (formulation and E), the light transmittance decreased and the solubilization ability decreased when the impropatul content was 20% by weight to 30% by weight.

From the above, it is clear that the solubilized cosmetic of the present invention has an excellent refreshing feeling.

Examples are shown below. Incidentally, the blending ratio is expressed in weight %.

Example 1. Astringent lotion [Method] At was dissolved and B was slowly added to the solution while stirring to obtain an astringent lotion.

Example M Aftershave Lotion [Method] An aftershave lotion was obtained in the same manner as in Example 1.

Example 3 Body loan 1 〔Method〕 Body rosy, yt-obtained in the same manner as in Example 1.

[Brief explanation of the drawing]

Figure 1 shows the relationship between ethanol content and light transmittance in the solubilization of liquid paraffin.
b is a product of the present invention (formulation A), and b is a comparative product (formulation B). Figure 2 shows the relationship between the isopropanol content and the light transmittance □ in the solubilization of fragrances. ) and ・ are comparative products ■ (formulation E). Patent applicant: Pola Chemical Industries, Ltd. Figure 1: Ethanol content (wt%)

Claims (1)

[Claims] 1) The compound represented by the following general formula (I) is
A solubilized cosmetic characterized by containing % by weight. RO(C_3H_6O)_a(C_2H_4O)_bH
(I) [However, R: saturated or unsaturated linear aliphatic alcohol residue having 12 to 22 carbon atoms a: 13 to 35 b: 13 to 40 b≧a]