JPH075450B2 - Transparent liquid oily cosmetic - Google Patents

Description

The present invention uses citric acid triethyl ester as a compatibilizer, and a liquid fatty acid ester having a branched chain, ethyl alcohol, citric acid triethyl ester and water are used in the present invention. The present invention relates to a compatibilized transparent liquid oily cosmetic composition. More specifically, it has a good transparency and excellent storage stability (does not cause deterioration of transparency, separation, discoloration, or odor even after long-term storage) and is excellent in skin familiarity (after) application. It gives a refreshing feeling without giving a sticky feeling or oily feel to the skin, and has good moisturizing properties after application, softness, and a moderate feel (good).
The present invention relates to an excellent liquid oily cosmetic capable of imparting gloss.

(Prior Art) Conventionally, liquid oil-based cosmetics (cosmetic oils) (oil-like cosmetics) retain and apply oil to skin (skin) and hair to impart flexibility and luster. Used (applied) to give and prevent excessive drying.

On the other hand, the necessary conditions for liquid oily cosmetics are:
(1) It has a high moisturizing property after application and can give a moist and good feeling (moist feeling). (2) Must be familiar to the skin. (3) It has an excellent effect of softening (softening) the skin. (4) Do not give a sticky feel (stickiness) when applied (after). (5) Appropriately good luster can be imparted to the skin or hair after application without giving oily light (glittery and dull gloss). (6)
It is stable even under long-term storage under severe conditions, does not cause discoloration or odor (generation of off-flavor), and does not deteriorate its appearance.
(7) Stable retention and dissolution of oil-soluble or water-soluble nutrients. No skin irritation and high skin stability.
Etc.

However, a liquid oily cosmetic satisfying these various conditions and satisfying them has not been obtained yet.

For example, in the case of an oil-based cosmetic composed of a liquid oil (alone), a sticky feeling, a strong oily feeling and oiliness are given to the skin at the time of application (after), and a two-layer type oil-based cosmetic composed of a liquid oil and ethyl alcohol. However, the shaking operation for uniformly mixing both components is inconvenient, and it is inconvenient, and even if they can be mixed, they are easily separated. Therefore, it is difficult to apply a suitable amount of both components at any time. Further, synthetic surfactants (anionic or nonionic surfactants) are used as emulsifiers (or solubilizers) to emulsify (solubilize) oily substances in ethyl alcohol or water, oil in ethyl alcohol type The oil-based cosmetics described above have drawbacks such as mass production and difficult process control even if the prescription design and manufacturing conditions are carefully set.

(Problems to be Solved by the Invention) As a result of earnest and extensive systematic studies to solve the above-mentioned problems of the prior art, the present inventors have found that triethyl citrate has a surfactant activity. In the specific combination (mixing) of using a liquid fatty acid ester having a branched chain as an oily substance and using ethyl alcohol and water as a compatibilizer between the two components, It acts, and the four components are easily compatibilized integrally to form an oily cosmetic which exhibits a transparent liquid and has high storage stability, and when the liquid oily cosmetic is applied to the skin (hair), The present invention has been completed by finding that it is excellent in skin familiarity, gives a refreshing feeling without giving a greasy feeling or oiliness (above), and can impart and express good gloss, moisturizing property and flexibility together with a moist feeling. .

The object of the present invention is to have a good transparent appearance and excellent storage stability (does not cause a decrease in transparency, separation phenomenon, discoloration, or odor even after long-term storage), skin during application (after). To provide a transparent liquid oily cosmetic which is excellent in familiarity and gives a refreshing feeling without giving a greasy feeling or oily lightness, and yet can give good moisturizing property, flexibility, moisturizing feeling and moderately good gloss after application. is there.

(Means for Solving Problems) That is, the transparent liquid oily cosmetic of the present invention has, in order to achieve the above-mentioned object, citric acid triethyl ester, ethyl alcohol, and water as main constituents. The composition is such that a liquid fatty acid ester having a branched chain is blended.

The citric acid triethyl ester used in the present invention is a known compound and is almost colorless and odorless liquid. The liquid fatty acid ester having a branched chain is a fatty acid ester which has a branched chain and is liquid at room temperature, for example, triglyceride of a branched saturated fatty acid such as 2-ethylhexanoic acid triglyceride, Myristic acid isopropyl ester, palmitic acid isopropyl ester, isocetyl myristate, octyldodecyl myristate, 2
-Ethylhexanoic acid isocetyl ester, ester consisting of a branched saturated fatty acid such as 2-ethylhexanoic acid isostearyl or a linear saturated fatty acid and a branched monohydric aliphatic alcohol is preferable, and further more preferable branched chain Examples of the liquid fatty acid ester having include di-2-ethylhexanoic acid neopentyl glycol ester, di-capric acid neopentyl glycol ester, malic acid di-
Examples thereof include esters composed of branched saturated fatty acids such as 2-ethylhexanate and succinic acid-di-2-ethylhexylhexanate, and glycols, esters composed of saturated dicarboxylic acids and branched saturated fatty acids, and the like.

The liquid fatty acid ester having a branched chain is used alone or in combination of two or more. Its typical loading is 5 to 90% by weight (preferably 10 to 80% by weight), the loading of citric acid triethyl ester is 5 to 90% by weight (preferably 10 to 80% by weight), and The total (total) blending amount of the citric acid triethyl ester and the branched liquid fatty acid ester is 18 to 92% by weight (preferably 30 to 90% by weight). If the amount of each component and the total amount of both components are out of the above ranges, it is difficult to achieve the above object.

The ethyl alcohol used in the present invention may be one that is commonly used, and for example, undenatured ethanol, various denatured ethanol and the like are used. The blending amount is 50-80
%, Preferably 10-70% by weight. If it is less than 5% by weight, the storage stability, transparency, feel (cooling feeling), etc. will deteriorate, and if it exceeds 80% by weight, the storage stability, feel, etc. will tend to decrease.

The water used in the present invention may be purified water such as ion-exchanged water and distilled water, and the compounding amount thereof is 2 to 10% by weight, preferably 3 to 7% by weight. If it is less than 2% by weight, the feel (skin familiarity) and moisture retention will be poor, and if it is more than 10% by weight, storage stability and appearance (transparency) will tend to be poor.

In the liquid oily cosmetic of the present invention, in addition to the above-mentioned components, γ-oryzanol, vitamin A, vitamin E, vitamin E nicotinic acid ester, ceramide, glucosylceramide, galactosylceramide, cholesterol and other oil-soluble nutrients, placenta It is also one of the features of the present invention that a water-soluble nutrient such as hyaluronic acid, amino acid, mucopolysaccharide, pitamine C, vitamin B15, and collagen can be stably dissolved (blended). The present invention may further contain conventional additives such as dyes, fragrances and preservatives.

The liquid oily cosmetic of the present invention can be applied to cosmetics such as facial oil, body oil, sun oil, baby oil and hair oil.

(Example) In the following examples, "part" means "part by weight" and "%" means "% by weight". In addition, the appearance (transparency), storage stability (whether there is discoloration or odor), moisturizing property, practical properties (skin softness after application, moist feeling, presence or absence of sticky feeling, oiliness, moderately good) shown in Examples The test method for the presence of luster and the presence of skin irritation) is as follows.

(1) Appearance (transparency) After the sample was stored in a thermostatic chamber at 5 ° C for 1 day, the transparency of the sample was visually observed and distinguished into transparent (○), slightly cloudy (△), and cloudy (x). evaluated.

(2) Storage stability After the sample was stored in a thermostatic chamber at 45 ° C for 3 months, the presence or absence of color change, odor change (odour), and transparency change were examined.

(3) Practical characteristics Practical tests were carried out by 20 panelists, and the skin was familiar, had a refreshing feeling, had soft skin, gave a moist feeling, gave a sticky feeling, and gave good luster. The number of people who gave skin irritation was shown.

(4) Moisture retention after makeup (application) It was measured using an impedance meter (IBS-354 type) manufactured by IBS. The measurement was carried out in a thermostatic chamber at 20 ° C. by applying a fixed amount (0.2 g / 4 cm ² ) of the sample to the upper arm of an adult male and then measuring the conductance (unit: micromho) over time. It is generally said that the larger the conductance, the smaller the electric resistance of the skin and the better the moisturizing property of the skin surface.

Example 1 (Facial Oil) 10 parts citric acid triethyl ester (hereinafter abbreviated as CTE), 10 parts ethyl alcohol, 5 parts water, and di-2-ethylhexanoic acid neopentyl glycol ester (hereinafter D2)
75 parts by abbreviated as EHPG) were mixed with stirring at 30 ° C. to obtain a facial oil of the present invention. The obtained facial oil is a transparent liquid, has good storage stability, discoloration, odor,
There was no decrease in transparency at all. In addition, 20 people out of 20 responded that they were familiar with the skin, 19 out of 20 responded that they felt a refreshing feeling during application, and 20 out of 20 answered that the skin became soft after application. 19 people, 18 people out of 20 people answered that they gave a moist feeling, 0 people out of 20 people who answered that they had a sticky feeling, and 20 people who answered that they gave good luster without oiliness. 18 out of 20 and 0 out of 20 responded that they gave skin irritation. And the moisturizing property after application is
Immediately after conductance (micro mho) (2 minutes later) 35
0, 10 minutes later, 13 and 30 minutes later 11 were good.

Example 2 (facial oil) The same procedure as in Example 1 was carried out except that CTE of 75 parts, ethyl alcohol of 10 parts, water of 5 parts and D2EHPG of 10 parts were used. The obtained facial oil of the present invention was a transparent liquid, had good storage stability, and had no discoloration, odor change, or reduction in transparency. 20 out of 20 responded that they were familiar with the skin, 19 out of 20 responded that they felt a cool sensation when applied, and 19 out of 20 who had soft skin after application, gave a moist feeling 19 out of 20 people gave a sticky feeling, but 0 out of 20 people gave a good luster without oiliness, but 18 out of 20 people gave skin irritation but 0 out of 20 people. It was The moisturizing property after application is 360, 10 immediately after the conductance (micro mho).
It was 14 minutes later and 12 minutes after 30 minutes, which was good.

Example 3 (facial oil) The same procedure as in Example 1 was carried out except that 30 parts of CTE, 30 parts of ethyl alcohol, 5 parts of water and 35 parts of D2EHPG were used. The obtained facial oil of the present invention was a transparent liquid, had good storage stability, and had no discoloration, odor, or reduction in transparency. 19 out of 20 responded that they were familiar with their skin, 19 out of 20 responded that they felt a cool sensation during application, and 20 out of 20 responded that their skin became soft after application. 19 out of 20 people answered that they gave a feeling, 0 out of 20 people who answered that they had a sticky feeling, 19 out of 20 people who answered that they gave a good luster without oiliness, 0 out of 20 people answered that they gave skin irritation. Moisturizing is
The conductance (micro mho) was 350 immediately after, 14 minutes after 10 minutes, and 12 after 30 minutes.

Example 4 (Facial Oil) The procedure of Example 1 was repeated, except that 10 parts of CTE, 75 parts of ethyl alcohol, 5 parts of water and 10 parts of D2EHPG were used. The obtained facial oil of the present invention was a transparent liquid, had good storage stability, and had no discoloration, odor, or reduction in transparency. Regarding the moisturizing property after application, the conductance (micro mho) is 360 immediately after, 14 after 30 minutes, 12 after 30 minutes,
It was good. Skin became soft after application, but out of 20
Eighteen people gave a moist feeling, but 18 out of 20 people gave a sticky feeling, but 0 out of 20 people gave a good luster, but 18 out of 20 people gave it.

Comparative Example 1 (Facial Oil) With CTE (alone), the skin became soft after application, but 20
It is difficult for 9 people to use as facial oil, poor for moisturizing, and bad for skin irritation for 2 people.

Comparative Example 2 (Facial Oil) With 50 parts of ethyl alcohol and 50 parts of D2EHPG, facial oil softened the skin after application, but 10 out of 20 people,
3 out of 20 people said that they gave skin irritation,
The moisturizing property (conductance) after application is poor and it cannot be used as a facial oil.

Comparative Example 3 (facial oil) D2EHPG (alone) had good skin familiarity, but 3 out of 20 gave a refreshing feeling when applied, 0 out of 20, and 12 out of 20 gave a sticky feeling. It is hard to use and cannot be used as a facial oil.

Comparative Example 4 (Facial Oil) A comparative facial oil consisting of 45 parts of ethyl alcohol, 5 parts of water and 50 parts of D2EHPG is cloudy and not preferable.

Comparative Example 5 (Facial Oil) A comparative facial oil consisting of 50 parts of CTE and 50 parts of ethyl alcohol was used by 20 people who answered that it caused skin irritation.
7 out of 6 people are bad.

Comparative Example 6 (Facial Oil) A comparative facial oil consisting of 50 parts of CTE and 50 parts of D2EHPG has poor moisture retention and is not preferable.

Comparative Example 7 (Facial Oil) A comparative facial oil produced in the same manner as in Example 1 except that liquid paraffin was used in place of D2EHPG (branched chain ester oil) had a separated and cloudy appearance. It is not good, and the skin (hair) does not shine and cannot give good luster.

Comparative Example 8 (Facial Oil) A comparative facial oil produced in the same manner as in Example 1 except that castor oil was used in place of D2EHPG (branched chain ester oil) had poor storage stability and was colored (discolored). It is not practical because it produces a strange odor.

Comparative Example 9 (Facial Oil) A comparative facial oil produced in the same manner as in Example 1 except that mink oil was used instead of D2EHPG (branched chain ester oil) was slightly cloudy and had an unfavorable appearance. Poor storage stability and easy to cause discoloration (coloring) and odor.

Example 5 (body oil) Obtained by adding 30 parts of isopropyl myristate and 30 parts of triethyl citrate to a uniform mixture of 0.1 part of L-leucine, 3.9 parts of water and 36 parts of ethyl alcohol, and uniformly mixing. The body oil of the present invention, which is a liquid having a transparent appearance, has good storage stability, is unlikely to cause coloration (discoloration) or odor, has good moisturizing properties after application, and has good skin compatibility, but among 20 people 19
People, who gave a refreshing feeling but 20 out of 20, 19 who softened the skin 19 out of 20, who gave a sticky feeling but 0 out of 20, gave a moderately good luster without oiling Eighteen of the people were good.

Example 6 (facial oil, hair oil) 20 parts CTE, 20 parts dicapric acid neopentyl glycol ester, 20 parts malic acid di-2-ethylhexanate, and 20 parts succinic acid-di-2-ethylhexylhexanate
Parts, water 5 parts, ethyl alcohol 14.8 parts and vitamin E nicotinic acid ester 0.1 parts were mixed and uniformly dissolved to obtain a transparent liquid oily cosmetic of the present invention. This oily cosmetic is applied as facial oil and hair oil.
This oily cosmetic has good storage stability, discoloration, odor,
There was no decrease in transparency at all. After application, it was good on the skin, but 19 out of 20 gave a refreshing feeling, but 18 out of 20
19 out of 20 people said that their skin became softer,
Twenty out of 20 responded that they gave a moist feeling without stickiness, and 19 out of 20 answered that they gave a good luster without oiliness. Further, as a result of using the hair as a hair oil, 20 out of 20 answered that the hair had good gloss and that the hair was softened. Further, the moisturizing property after application was as good as in Example 1.

(Effects of the Invention) As described above, in the present invention, when the ethyl alcohol, water and the liquid fatty acid ester having a branched chain are blended with the triethyl citrate as a compatibilizer, a synthetic surfactant is used. The above four components can be integrally compatibilized with each other, and have a good transparent appearance and excellent storage stability (even if stored for a long period of time, deterioration of transparency, separation phenomenon, discoloration, or odor may occur. Excellent liquid oiliness that can give good moisturizing property, flexibility, moisturizing feeling and moderate (good) luster without giving sticky feeling or oily feel to the skin (hair) when applied (after) Cosmetics can be manufactured easily and advantageously industrially, and the specificity of their action and effect is remarkable.

Claims (4)

[Claims] 1. A transparent liquid oily cosmetic, characterized in that citric acid triethyl ester, ethyl alcohol, a liquid fatty acid ester having a branched chain, and water are blended as main constituents. . 2. A compound containing 5 to 90% by weight of citric acid triethyl ester (% by weight based on the weight of the final composition; hereinafter the same) and 5 to 90% by weight of a liquid fatty acid ester having a branched chain. And the total content of both components is
The transparent liquid oily cosmetic according to claim (1), which is 18 to 92% by weight. 3. A transparent liquid oily cosmetic according to claim 1, which contains ethyl alcohol in an amount of 5 to 80% by weight. 4. The transparent liquid oily cosmetic according to claim 1, which contains water in an amount of 2 to 10% by weight.