JPH06692B2 - Emulsified cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an emulsified cosmetic composition obtained by emulsifying an oily substance using a compound represented by the following general formula as an emulsifier. More specifically, it acts mildly on the skin and hair, has excellent emulsifying properties and storage stability (durability over time), and has a touch, moisture retention, usability (stretching, spreading, etc.) and appearance (gloss, texture). And the like).

(Prior Art) Conventionally, as an essential condition for emulsion type cosmetics such as cream and emulsion, (1) high safety without irritating the skin and hair.

(2) Emulsion stability is good even after long-term storage.

(3) Good appearance such as texture and gloss.

(4) When used, it should be smooth, stretchy, and have a good feel (it gives a refreshing or moist feeling to the skin. It does not give a sticky feeling).

(5) To give proper moisturizing properties (water retention) to the skin and hair.

(6) Do not cause deterioration or odor even after long-term storage. Etc.

However, in order to satisfy these conditions, careful formulation design such as selection of emulsifiers, specific combination, combination of special bases, etc. is carried out, but it is not easy to achieve the purpose.

Emulsified cosmetics (for example, creams) using ordinary synthetic emulsifiers (for example, anionic or nonionic synthetic surfactants) generally have a drawback that they tend to cause irritation to the skin and hair.

On the other hand, lecithins such as egg yolk lecithin and soybean lecithin are known as natural emulsifiers that are mild to the skin and the like, but their emulsifying power was not sufficient due to their oily substances. Furthermore O
In the case of producing a / W-type emulsion, the phase was converted to a W / O-type emulsion at around room temperature, and the appearance and the emulsification characteristics were not so good. Furthermore, it has the drawback that it may deteriorate and odor during long-term storage.

(Problems to be Solved by the Invention) As a result of intensive studies by the present inventors to develop a phospholipid-based emulsifier that has improved the above-mentioned problems of the prior art, the compound represented by the general formula described below is an oily substance. It can be emulsified uniformly, acts mildly on the skin and hair, has excellent emulsification properties and storage stability, and has good feel, moisture retention, usability (stretching, spreading, etc.), and appearance (gloss, texture, etc.) The present invention has been completed by finding that an emulsified cosmetic can be easily produced.

The object of the present invention is to act mildly without causing irritation to the skin and hair, and to have excellent emulsifying properties and storage stability, and also to feel, moisturize, usability (stretching, spreading, etc.) and appearance ( It is to provide an emulsion cosmetic having good gloss, texture, etc.

Another object of the present invention is to provide a novel emulsifier useful for the production of emulsion cosmetics. Still another object is to provide an emulsified cosmetic composition which does not require the use of a synthetic surfactant and facilitates the formulation design (composition design) of the emulsified cosmetic composition and which can be produced industrially advantageously. .

(Means for Solving Problems) The above-mentioned object is that the main constituent component is an emulsifier, an oily substance and water, and the following general formula (In the above formula, R ₁ is-(CH ₂ ) ₁₅ CH ₃ group or-(CH ₂ ) ₁₇ C.
H ₃ group and R ₂ are —OH groups or —OCOCH ₃ groups) are emulsified cosmetics containing at least one compound represented by the formula.

The compounds represented by the above general formula in the present invention are known compounds and are represented by the following structural formulas (1) to (4).

(1) 1-palmityl-3-glycerylphosphorylcholine (2) 1-stearyl-3-glycerylphosphorylcholine (3) 1-palmityl-2-acetyl-3-glycerylphosphorylcholine (4) 1-stearyl-2-acetyl-3-glycerylphosphorylcholine The compound represented by the above general formula used in the present invention is a known compound, and for example, a semi-synthetic product starting from a lecithin fraction of bovine heart muscle or a fully synthetic product starting from D-mannitol or tartaric acid is used. used. The compound represented by the above general formula is safe for the human body, and skin irritation thereof was carried out according to the method of Draize described below, and as a result, the animal skin irritation score and the human body skin irritation score were both 0.
(Zero), and confirmed to be non-irritating.

Reference: Dreize, US Government Food and Drug Association, "Safety Assessment of Chemicals Used in Foods, Drugs and Cosmetics", pages 46-59 (1959) [JHDraize, Ass
ociation of Food and Drug Officials of the United
States. “Appraisal of the Safety of Chemicals in F
oods, Drugs and Cosmetics "P.46-59 (1949).] The compound represented by the above general formula in the present invention is used as an emulsifier in one kind or in combination of two kinds. The amount is 0.01 to 10% by weight, preferably 0.1 to 5% by weight, based on the total weight of the prescription components in the cosmetic (weight of the composition). The emulsification tends to be poor, and if it is more than 10% by weight, the solubility in the system is lowered and the feel is not sufficient.

Examples of the oily substance that can be used in the present invention include known oily substances for cosmetics, higher aliphatic hydrocarbons, animal oils and fats, vegetable oils and fats, waxes, higher alcohols, higher fatty acids, ester oils, Silicon oil or the like. Hydrocarbons include, for example, liquid paraffin, squalane, microcrystalline wax, vaseline, ceresin, and vegetable oils and fats include, for example, olive oil, castor oil, cocoa butter,
Examples of animal fats and oils such as balm oil include cod liver oil,
Examples of waxes such as beef tallow, butterfat include dense wax,
Examples of higher fatty acids such as carnauba wax include lauric acid, myristic acid, valmitic acid, stearic acid,
Examples of higher alcohols such as oleic acid, behenic acid and lanolin fatty acid include lauryl alcohol, stearyl alcohol, cetyl alcohol and oleyl alcohol, and ester oils include butyl stearate, hexyl laurate, octyldodecyl myristate, Examples thereof include linear esters such as diisopropyl adipate and diisopropyl sebacate, and branched chain esters.

These oily substances are used alone or in combination of two or more. The amount used (blending amount) is 5 to 70% by weight, preferably 10 to 60% by weight, based on the total weight of the prescription components in the cosmetic. If the amount is less than 5% by weight, the storage stability is slightly deteriorated and the feel is slightly refreshed, and if the amount is more than 70% by weight, the oil becomes extremely sticky, which is not preferable.

The blending amount of water in the present invention is 30 to 95% by weight, preferably 40 to 90% by weight, based on the total weight of the ingredients.

The compound represented by the above general formula used in the present invention exhibits good surface activity (ability to reduce interfacial tension) and can stably emulsify the oily substance, but casein soda, pectin,
Xanthan gum, karaya gum, locust bean gum,
When at least one water-soluble natural polymer selected from the group consisting of carrageenan is blended, the oily substance can be emulsified very stably. The natural polymers may be used alone or in combination of two or more,
The blending amount is 0.05 based on the total weight of the prescription ingredients.
-3% by weight, preferably 0.1-2% by weight.

In the cosmetics of the present invention, it is not necessary to add pigments to massage creams, cleansing creams, skin creams, skin milks, hair creams and the like, but foundation creams and liquid makeup bases further contain pigments in addition to the above components. Must be added and compounded. The amount of the pigment used is 10% by weight or less, preferably 0.5 to 7% by weight, based on the total weight of the prescription ingredients.

Examples of pigments include titanium oxide, kaolin, talc,
Inorganic pigments such as mica and iron oxide can be mentioned.

Further, if desired, a small amount of a cosmetic active ingredient, a fragrance, an antiseptic, a coloring agent, and a synthetic surfactant can be added.

Examples of the creamy or milky liquid cosmetics of the present invention include massage creams, cleansing creams, skin creams, skin milks, foundation creams,
It is applied to many creamy or milky liquid cosmetics such as liquid make-up base, hair cream for skin and hair.

The creamy or milky liquid cosmetic composition of the present invention acts mildly without irritating the skin and hair and has a feeling,
It has good moisturizing properties and usability (stretching, spreading, etc.), has a fine texture, and has a good glossy appearance, and also has excellent emulsifying properties and storage stability.

Examples will be described below.

The parts shown in the examples mean parts by weight. The characteristics of the emulsified cosmetics shown in the examples: appearance (skin texture, gloss), usability (stretching, spreading, etc.), touch effect, etc. were examined by three specialist inspectors. The skin is judged with the naked eye, and the gloss is JIS-Z-8741-1.
It was measured according to Method 2 of 962 Glossiness Measurement Method. Regarding the feel effect, the sample composition was examined for the feel on application to the skin and the finish after application. Usability (stretching, stretching, etc.) was judged by actually seeing with a finger.

Example 1 (skin cream) (1) Formulation 1-palmityl-3-glyceryl phosphorylcholine 3 parts Liquid paraffin 25 parts Cetyl alcohol 5 parts Methyl paraoxybenzoate 0.2 parts Perfume 0.2 parts Purified water 66.6 parts (2 ) Manufacturing method The above-mentioned oily components are uniformly dissolved at about 80 ° C. (Solution 1). The water-soluble components and the above components are uniformly dissolved at about 80 ° C. (Solution 2). Next, while stirring Solution 2 with a homomixer, Solution 1 is added and emulsified, and then cooled. The components were added at 70 ° C. during the cooling process, and the temperature was lowered to 30 ° C., after which stirring was stopped.

The skin cream thus obtained is an O / W type emulsion and has a good appearance such as skin texture and gloss (glossiness = 90%).
It had a good feel, moisture retention and usability (stretching, spreading, etc.) and was extremely stable in a constant temperature bath at 40 ° C for 4 months, even after storage. At 5 ° C and 30 ° C, it was extremely stable even after 6 months. Furthermore, neither alteration nor odor occurred.

Comparative Example 1 Instead of 1-palmityl-3-glycerylphosphorylcholine, phosphatidylcholine (1-palmitoyl-2-
A comparative skin cream was prepared in the same manner as in Example 1 except that oleoyl-3-glycerylphosphorylcholine) was used. As a result, the obtained skin cream
It is an O / W type emulsion with very rough skin, poor gloss (gloss = 50%), and creamy finish. When stored for 4 months in a 40 ° C constant temperature bath,
Separation into two layers resulted in poor emulsion stability and alteration (coloring).

Comparative Example 2 A comparative skin cream was prepared in the same manner as in Example 1 except that soybean lecithin was used instead of 1-palmityl-3-glycerylphosphorylcholine. As a result, the obtained skin cream was a W / O type emulsion and had a very rough texture and was not smooth. When it was stored for 4 months in a constant temperature bath at 40 ° C, it was partially separated into two layers. Furthermore, the color changed to brown, and a strange odor also occurred.

Example 2 (Skin cream) A skin cream was prepared according to Example 1 with the formulation based on Table 1. The characteristics of each cream thus obtained are shown in Table 2.

From Table 2, a good cream was obtained with 0.01 to 10% by weight of 1-stearyl-3-glycerylphosphorylcholine. On the other hand, if it is less than 0.01% by weight, it will separate immediately
If it exceeds 0% by weight, the gloss and feel become poor and it becomes difficult to use. As is clear from these results, a good skin cream was obtained when the compounded amount of the compound represented by the general formula of the present invention was 0.01 to 10% by weight (preferably 1 to 5% by weight).

Example 3 (Cleansing Cream) A cleansing cream was produced in the same manner as in Example 1 except that the weight part of the liquid paraffin used in Example 1 was changed. The characteristics of each cream thus obtained are shown in Table 3. As is clear from this result,
The amount of the oily substance is 5 to 70% by weight (preferably 1%).
A cleansing cream with good appearance, feel, emulsifying property, and storage stability was obtained at 0 to 60% by weight).

Example 4 (Skin milk) (1) Formulation Cetyl alcohol 5.0 parts Octyldodecyl myristate 1.5 Squalane 20.0 Xanthan gum 0.5 1-stearyl-2-acetyl-3-glycerylphosphorylcholine 3.0 Paraoxybenzoic acid Methyl 0.2 Fragrance 0.2 Purified water 72.6 (2) Production method The above-mentioned oily ingredients ~ are uniformly dissolved at about 80 ° C (solution 1). The water-soluble components (1) and (2) are uniformly dissolved at about 80 ° C. (solution 2). Next, while stirring Solution 2 with a homomixer, Solution 1 was added, emulsified, and then cooled. The components were added at 70 ° C. during the cooling process, and the temperature was lowered to 30 ° C., after which stirring was stopped.

The thus-obtained skin milk is an O / W type emulsion and has a good appearance such as texture and gloss (glossiness = 86%), and also has a good feel (skin familiarity and finish), moisture retention and usability (extension). It was extremely stable after storage in a constant temperature bath at 40 ° C. for 2 months. Further, at 5 ° C. and 30 ° C., it was extremely stable even after 4 months. Furthermore, neither alteration nor odor occurred.

Example 5 (Hair Cream) (1) Formulation Cetyl alcohol 1.5 parts Microcrystalline wax 5.0 Beeswax 2.5 Glycerin monostearate 1.0 Liquid paraffin 40.0 1-palmityl-2-acetyl-3- Glycerylphosphorylcholine 3.0 Methyl paraoxybenzoate 0.2 Perfume 0.2 Purified water 46.6 (2) Production method The oily ingredients ~ of the above ingredients are uniformly dissolved at about 80 ° C (solution 1). The water-soluble components and the above components are uniformly dissolved at about 80 ° C. (Solution 2). Next, while stirring Solution 2 with a homomixer, Solution 1 was added, emulsified, and then cooled. The components were added at 70 ° C. during the cooling process, and the temperature was lowered to 30 ° C., after which stirring was stopped.

The hair cream thus obtained is an O / W type emulsion and has an appearance such as skin texture, gloss (glossiness = 93%), hair,
It was easy to apply to the scalp, it was very familiar, and it made the hair very soft. It was stable after storage in a constant temperature bath at 40 ° C for 2 months. Further, at 5 ° C. and 30 ° C., it was stable even after 5 months, and neither deterioration nor odor occurred.

Example 6 (Foundation cream) (1) Formulation Liquid paraffin 45.0 parts Ceresin 5.0 parts Glycerin monostearate 1.0 1-Stearyl-2-acetyl-3-glycerylphosphorylcholine 3.5 Methyl paraoxybenzoate 2 Titanium oxide 2.5 Kaolin 1.2 Talc 1.3 Yellow iron oxide 0.3 Purified water 40.0 (2) Production method Same as in Example 5.

The foundation cream thus obtained is an O / W type emulsion and has good appearance, feel, moisture retention and usability.
It was stable in a constant temperature bath of 0 ° C. even after 2 months, and extremely stable at 5 ° C. and 30 ° C. after 6 months. Furthermore, neither alteration nor odor occurred.

Claims (2)

[Claims] 1. A main component comprises an emulsifier, an oily substance and water, and the emulsifier has the following general formula: (In the above formula, R ₁ is-(CH ₂ ) ₁₅ CH ₃ group or-(CH ₂ ) ₁₇ C.
H ₃ group, R ₂ is at least emulsifying one is blended cosmetics of the compound represented by the a) -OH group or -OCOCH ₃ group. 2. At least one of the compounds represented by the above general formula is 0.01-based on the total weight of the ingredients.
The emulsified cosmetic composition according to claim (1), which contains 10% by weight.