JPH03120208A - Cosmetic - Google Patents

Abstract

PURPOSE:To obtain a cosmetic for the skin and the hair, hardly having irritation to the skin in spite of low viscosity, well spreading in use, providing a refreshing touch, containing a specific dicarboxylic acid ester. CONSTITUTION:A cosmetic containing >=1wt.% (preferably 5-30wt.%) compound (e.g. hexyl sebacate) shown by the formula (R<1> and R<2> are 1-8C alkyl; n is 6-14 integer). The compound shown by the formula satisfies low viscosity and nonstimulation at the same time and can supplies a high-quality cosmetic. The cosmetic comprises the compound shown by the formula as an essential component and may contain components usually used for cosmetic, such as solvent, wax or oil solution.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides cosmetics containing a specific dicarboxylic acid diester,
In particular, the present invention relates to cosmetics suitable as skin and hair cosmetics.

[Conventional technology]

Oils used in cosmetics are required to be non-irritating to the skin, stable over time, and have an excellent feel to the skin. Furthermore, since cosmetics are used on human body parts, it is basically desirable to use raw materials similar to the constituent components of human sebum. For this reason, the introduction of compounds with unsaturated bonds like human sebum has been considered, but their stability against light and air is poor, and the toxicity of their oxidation products remains unresolved. there were.

Based on the above points, various studies have been conducted, and linear or branched fatty acid esters of neopentyl glycol have been developed as an oil agent that is non-irritating, stable against oxidation, and has an excellent feel on the skin. It has been proposed (Japanese Unexamined Patent Publication No. 5
5-2648 and JP-A-50-121442). These are currently used very widely as bases for cosmetics.

[Problem to be solved by the invention]

However, even these existing oils still do not satisfy all of the tactile performance requirements.

Furthermore, there is a strong demand for oils with newer textures and special functions.

On the other hand, there is a demand for particularly low-viscosity oils, but reducing the molecular weight to reduce viscosity tends to cause skin irritation, and it is extremely difficult to satisfy both low viscosity and non-irritating properties. It was difficult.

Therefore, an object of the present invention is to provide a base that is low in viscosity but causes little irritation to the skin and has an excellent feel during use, thereby providing a cosmetic with good quality.

[Means to solve the problem]

The above object was achieved by containing 1% by weight or more of a dicarboxylic acid diester represented by the following general formula (I) in a cosmetic.

General formula (1) (In the formula, R1 and R2 represent an alkyl group having 1 to 8 carbon atoms, and n represents an integer of 6 to 14.) In the above formula, R1
and R2 may be the same or different, and C,,t
As l, , -(CH2), , - is preferable.

The diester of the present invention is produced, for example, by esterifying a dicarboxylic acid having 8 to 16 carbon atoms and an alcohol. In this case, the dicarboxylic acids include speric acid (n=6), sebacic acid (n=8), brassylic acid (n=11), and tetradecanedicarboxylic acid (n=1
2>, bentatecanedicarboxylic acid (n=13), hexadecanedicarboxylic acid (n=14), and the like. Examples of the alcohol include saturated straight alcohols having 1 to 8 carbon atoms and saturated branched alcohols having 3 to 8 carbon atoms.

Various known methods can be employed for the esterification reaction, and a catalyst may or may not be used.

Note that the method for producing the ester of general formula (■) is not limited to the above method.

In general formula (1), n is required to be 14 or less. When n=15 or more, the viscosity becomes high, the cloud point of the formulation increases, and the compatibility with solvents such as alcohol is poor, which is not preferable.

The amount of the above-mentioned ester blended in the cosmetic is 1% by weight (hereinafter referred to as %) or more, preferably 2.5% or more, particularly preferably 5% or more. In other words, if the amount is less than this, the cosmetic cannot function as an oil agent. The ester is preferably contained in an amount of 80% or less, preferably 50% or less, particularly preferably 30% or less.

In the present invention, it is essential to contain the above-mentioned ester as an oil agent, and other ingredients commonly used as cosmetics can be contained. For example, solvents such as ethanol, ethyl acetate, acetone, hexane, isopropyl alcohol; carnauba wax, candelilla, beeswax, squalane,
Waxes such as vaseline, liquid paraffin, and paraffin wax; isopropyl valmitate, isopropyl myristate, octyldodecyl myristate, diisostearyl malate, epityl lactate, 2-ethylhexanoic acid triglyceride, tri(caprylic, capric) glyceride, Oil agents such as diisostearic acid diglyceride, triisostearic acid diglyceride, and castor oil; alcohols such as cetanol and stearyl alcohol; and the like.

〔Effect of the invention〕

The diester represented by the general formula (I) generally has a low viscosity, and cosmetics containing it spread easily and give a light feel when used. In addition, there was almost no skin irritation, and the drawbacks of conventional low-viscosity oils could be solved.

Furthermore, these diesters have some antibacterial properties, so when used as a base for cosmetics, other antibacterial agents such as paraoxybenzoic acid ester (paraben),
It is characterized by the fact that it does not require the addition of preservatives or the amount added can be reduced. Furthermore, when used as a hair cosmetic, it also has a dandruff-preventing effect and a hair tonic effect.

Therefore, the cosmetics of the present invention can be used as cosmetic creams, milky lotions, lipsticks, foundations, hair liquids, shampoos, etc.
It can be used in a wide range of cosmetics such as conditioners and hair tonics.

Next, the present invention will be explained with reference to Examples and Reference Examples.

〔Example〕

Reference Example 1 880 g of sebacine, 55 g of hexyl alcohol, and 1 g of sulfuric acid were subjected to a dehydration reaction in xylene at 160 to 200° C. until the acid value became constant. After the reaction was completed, deoxidation was performed in a conventional manner, and 91 g of dihexyl sebacate was obtained by vacuum distillation.

Reference example 2 Brassylic acid 100g, ethanol 1000d.

1 g of sulfuric acid was reacted at 80°C. When the acid value became constant, ethanol and water were distilled off under reduced pressure.

1,000 ml of ethanol was added again, and the reaction was carried out two more times until the acid value became 5 or less. After the reaction is completed, deoxidation is performed in a conventional manner and the desired diethyl brassylate 73 is obtained by vacuum distillation.
I got g.

Table 1 shows the physical properties of dicarboxylic acid diester obtained by the same method.

Table-1 won.

Example 1 Cream oily component Nistearic acid 12.5% Diethyl brassylate 1.5 Vaseline 2.0 Emulsifier: Self-emulsifying monostearic acid glyceride
2.5 * Comparative Example A human skin irritation test was conducted on these esters using an occlusive patch test. In other words, a lint cloth coated with these esters was applied to the anterior chamber or the flexor side of the upper arm of 20 healthy women, and a patch test adhesive was fixed on top of the lint cloth, and after 24 and 48 hours, the presence or absence of erythema and other changes was determined. As a result of the evaluation, there was no change in any of them, and almost no irritation was observed.Fragrance 20.5 Aqueous phase: Propylene glycol 10.5 Purified water Propylene glycol was added to the remaining purified water and heated to 70°C. Separately, mix and dissolve oily ingredients, emulsifiers, and fragrances.
heated to ℃. This oil phase was added to the aqueous phase and stirred, and then uniformly emulsified using a homomixer, and then cooled to 30° C. while stirring.

This cream had a moisturizing feel and was hardly irritating.

Example 2 Emulsion oily component Setanol nistearate Vaseline Lanolin Alcohol 0.2% 1.5 3.0 2.0 Fragrance 0
．． 5 Humectant: Glycerin 3.0 Propylene Glycol 5.0 Alkali: Triethanolamine 1.0 Purified Water A humectant and an alkali were added to the remaining purified water and mixed with heat.

Separately, an oil component, an emulsifier, and a fragrance were mixed and heated to 70°C. This oil phase was added to the aqueous phase described above and pre-emulsified, uniformly emulsified using a homomixer, and after emulsification cooled to 30°C using a heat exchanger.

This emulsion easily blended into the skin and had an excellent feeling of use.

Example 3 Lipstick base diosikelite 5.0% ceresin 5.0 solid paraffin
10.0 trioctanoic acid glyceride
17.0 Diisostearyl malate 40.0 Octyldodecyl myristate 10.0 Dibutyl brassylate 3.0 Coloring material: Titanium oxide
1.0 Red No. 201 1.0
Red No. 202 1.0 Blue No. 1 Aluminum Lake 0.5 Mica Titanium
6.5 Others: Fragrance An appropriate amount of the base material was heated and melted and mixed uniformly. Add coloring material to this,
After kneading with a roll mill to uniformly disperse the mixture, it was remelted, flavoring was added, defoamed, poured into molds, and rapidly cooled to solidify.

The solidified material was taken out of the mold and loaded into a container. The stick was then trimmed for appearance and then passed through the flame (framing) to make the surface even.

This lipstick had excellent adhesion to the lips.

Example 4 Foundation oil phase Ethyl methyl nistearate brassylate 5.0% 3.0 Cetostearyl alcohol 1.0 Liquid paraffin Isopropyl myristate Aqueous phase: Purified water Triethanolamine Sorbitol pigment Titanium dioxide kaolin Talcum bentonite Colored pigment Fragrance: Perfume 4.0 8.0 53.3 1.2 3.0 8.0 5.0 2.0 1.0 An appropriate amount of pigment was mixed and ground. An aqueous phase was prepared, the mixed pigment was added thereto, dispersed, and then heated to 75°C. An oil phase was prepared and heated to 80°C. Add the oil phase to the water phase with stirring;
After emulsifying, the mixture was cooled while stirring, a fragrance was added at 50° C., and the mixture was further cooled to room temperature while stirring.

This foundation had strong adhesion and less makeup layering.

Example 5 Hair liquid diisopropyl pentadecanedicarboxylate 6% ethanol 55 fragrance
Appropriate amount of dye Appropriate amount of purified water Remaining portion Diisopropyl pentadecanedicarboxylate, polyoxypropylene butyl ether, and fragrance were added to ethanol with stirring and dissolved at room temperature. Purified water was added to the ethanol phase and stirred until homogeneous.

Example 6 Shampoo dimethyl pentadecane dicarboxylate 3% sodium alkyl ether sulfate (ABS-Na) 16 lauric acid diethanolamide 4 Propylene glycol 2 Pigments, fragrance
Trace Purified Water The remaining purified water was heated, other components were added thereto, dissolved, stirred well, and then cooled slowly.

This shampoo had a moist finish.

Example 7 Rinse dihexyl sebacate 5.0% stearyltrimethylammonium chloride 1.5 cetanol 2.0 2-octyldodecanol 1.0 cationized cellulose 0.5 polyoxyethylene cetyl ether 1.0 propylene glycol
5.0 Fragrance 0.2 Purified water The remaining purified water was heated, other ingredients were added thereto, dissolved, stirred well, and then cooled slowly. This conditioner gave hair flexibility and natural shine.

Example 8 Hair tonic d1-α-tocopherol acetate 1.0% Diethyl brassylate 1.0 Hinokitiol 0.1 Isopropylmethylphenol 0. Lusorcin
0.11~Menthol
0.1 dipropylene glycol
3 Lactic acid 1.0 Ethanol 65 Purified water
The remaining lactic acid was added to purified water and dissolved. The other components were sequentially added to the ethanol and dissolved. The aqueous phase was added to the ethanol phase to make it homogeneous, and then filtered. This hair tonic was effective as a dandruff agent and hair tonic, preventing dandruff caused by bacterial growth and hair loss caused by excessive dandruff.

Claims (1)

[Claims] General formula ▲ Numerical formulas, chemical formulas, tables, etc. ▼... (I) (In the formula, R^1 and R^2 represent an alkyl group having 1 to 8 carbon atoms, and n represents an integer from 6 to 14.