JPH06693B2 - Emulsified cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to an emulsified cosmetic composition which has no skin irritation and is excellent in emulsion stability, feel during use, moisturizing properties and the like.

(Prior Art) Conventionally, as an essential requirement for emulsion type cosmetics such as cream and emulsion, (1) high safety without irritating the skin. (2) High emulsion stability. (3) It should have a good feel when used. (4) To be able to supply and retain a suitable amount of water on the skin. Etc.

However, although various kinds of surfactants, raw materials, etc. are selected and their compositions are designed in order to satisfy such conditions, it is not easy to achieve the purpose. For example,
Generally, ether type nonionic surfactants such as ethylene oxide adducts of higher aliphatic alcohols and anionic surfactants such as basic salts of higher fatty acids have skin irritation,
Ester type nonionic surfactants composed of higher fatty acids and polyhydric alcohols have drawbacks such as poor emulsification properties.

DISCLOSURE OF THE INVENTION As a result of intensive studies conducted by the present inventors in view of the above-mentioned current situation, an emulsion type obtained by blending an extract obtained by extracting a defatted camellia (Camellia Japonica Linn) seed defatted product with water or a hydrous lower alcohol The present invention has been completed based on the finding that cosmetics have excellent properties such as emulsion stability, feel during use, and moisturizing properties, and can satisfy the above essential requirements.

(Object of the Invention) An object of the present invention is to provide an emulsion cosmetic which has no skin irritation and is excellent in emulsion stability, feel during use, moisturizing properties, and the like.

(Structure of Invention) That is, the present invention relates to camellia (Camellia Japonica Linn)
An emulsified cosmetic composition comprising a water extract or a hydrous lower alcohol extract of a defatted seed.

(Detailed Description of Configuration) The defatted camellia seeds according to the present invention is a residue obtained by extracting camellia oil from camellia seeds widely distributed in the Japanese archipelago, the Korean Peninsula, and the Shandong Peninsula of China, and drying the residue. It is crushed and usually used as fertilizer.

The method for obtaining the extract used in the present invention from the defatted camellia seeds is an ordinary method, and the extraction solvent may be water or a hydrous lower alcohol.

The lower alcohol may be methanol, ethanol, isopropyl alcohol or the like, and ethanol and isopropyl alcohol are particularly preferable. The concentration is preferably 0 to 50% by weight (hereinafter abbreviated as wt%),
Water or a hydrous lower alcohol that is compatible with a predetermined reflux extraction temperature is selected as the extraction solvent.

The extraction method and the purification method are conventional methods. First, the crushed and dried camellia seed defatted product is immersed in 3 to 5 times its amount of water or hydrous lower alcohol to obtain a temperature of 80 to 100 ° C.
After 2 to 5 hours under reflux extraction, the camellia seed defatted product and the extraction solvent are separated, and the same operation is repeated with fresh water or hydrous lower alcohol to extract 2 to 4 times. Then, the extraction solutions are combined and the solvent is distilled off at a temperature of 60 ° C. or less to obtain a paste-like crude extract.

Since this extract has a unique odor and color, it is preferable to further purify it as follows, if necessary.

The above extract is dissolved in 2 to 4 times its volume of hydrous lower alcohol (alcohol concentration 20 to 40 wt%), and the solution is adsorbed on a column of a porous ion exchange resin (for example, Mitsubishi Kasei Diaion high porous polymer). After adsorbing the adsorbate on the column with water containing 10 wt% or less of lower alcohol, impurities such as sugars, amino acids, and pigments are eluted and removed, and then adsorbed with a hydroalcoholic solvent containing 50 wt% or more of lower alcohol. 2 of the above extract
Obtain ~ 4 volumes of eluate. Further, this eluate is heated to a temperature of 60 ° C.
The solvent is distilled off under reduced pressure to obtain a purified extract of defatted camellia seeds of the present invention. This extract is a pale yellow powder with a slight peculiar odor and is easily soluble in water, hydrous ethanol, hydrous isopropyl alcohol, etc., and the pH value of a 1 wt% aqueous solution of the extract shows 4.0 to 5.0.

The emulsion cosmetic of the present invention is applied as a cosmetic for the skin or hair such as massage cream, cleansing cream, skin cream, skin milk, make-up base, hair cream, hair treatment and the like.

The extract of the defatted camellia seeds is blended with these emulsified cosmetics as an emulsifier component and a humectant component. The blending amount is 0, based on the total amount of the composition of the emulsion cosmetic.
It is 1 to 5.0 wt%, preferably 0.2 to 3.0 wt%. Compounding amount is 0.
If it is less than 1 wt%, it is difficult to obtain satisfactory storage stability as a cosmetic due to its poor action as an emulsifier, and if the compounding amount exceeds 5.0 wt%, the cosmetic is applied to the skin or hair to give a sticky or irritating feeling. There is a drawback such as occurrence of.

(Examples of the Invention) Hereinafter, the present invention will be described with reference to Examples.

The test methods for the emulsion stability test, human skin patch test, moisturizing test, and feel (sensory test during use) described in Examples are shown below.

The emulsion cosmetic of the present invention is not limited to the description in the examples, and other ingredients such as fragrances, preservatives, coloring agents, medicinal ingredients, surfactants, emulsion stabilizers, etc. can be used for the purpose of the present invention. It may be appropriately mixed within the range to be achieved.

(1) Emulsion stability test Place the sample in a constant temperature bath at 45 ° C and observe the emulsified state and appearance after standing for 3 months. If no abnormality is observed (emulsion state is uniform and homogeneous emulsion is formed). If there is an abnormality (when the oil separates, when the particles become coarse, etc.), it is regarded as bad.

(2) Human skin patch test Twenty-five subjects had skin on the flexion side of the forearm, and 0.05 g of the sample had a diameter of 1.
After applying a patch test adhesive bandage with a 0 cm circular lint cloth for 24 hours, the skin condition of 25 subjects was evaluated for each sample according to the criteria in Table 2 below. did. Judgment result is 1 hour after removing the bandage and 2
The one with the strongest reaction was adopted after 4 hours, and the evaluation was shown by the number of people with (±) or more.

(3) Feeling (sensory test during use) Twenty female test subjects conducted a sensory test to test the moisturizing and irritating properties. The evaluation is shown by the number of people who answered "moisturize after use" for moisturizing property and the number of people who answered "feel irritation after use" for irritation.

Examples 1 to 4 and Comparative Examples 1 and 2 [Skin cream] Skin creams, which are emulsion cosmetics of various Examples and Comparative Examples, were prepared by changing the compounding amount of the extract, and various tests were conducted.

(1) Manufacture of extract of defatted camellia seed defatted 1 kg of dried thin pieces of defatted camellia seed defatted was immersed in hydrous methanol (methanol concentration 30 wt%) 5 and the temperature was 90 to 95 ° C.
After reflux extraction in the water bath for 2 hours, the solid matter and the extraction solution were separated, and the same extraction operation was repeated twice using new hydrous methanol. The water-containing methanol extraction solutions were combined three times and concentrated under reduced pressure at a temperature of 50 ° C. to obtain about 0.55 kg of a crude extract. Then, this extract was added to a 20 wt% ethanol aqueous solution 1
After being dissolved in 0, 1.5 kg of an ion exchange resin (Diaion, high-porous polymer 507) was dispersed in water 20 and poured into a packed column, which was then allowed to flow down to adsorb the above extract. Then, after washing with water to remove water-eluted components, 60
A solvent of a wt% ethanol aqueous solution 40 was injected and allowed to flow down to be eluted from the adsorbate on the column. The eluate was distilled off under reduced pressure at a temperature of 50 ° C. and then dried to purify the present invention. 0.15 kg of the extract (1) was obtained. This was almost odorless, pale yellow powder.

(2) Composition (3) Preparation method Component (A) and component (B) are each uniformly dissolved at a temperature of 80 ° C.,
It is prepared by injecting the component (B) while stirring the component (A), emulsifying and dispersing, and then cooling to a temperature of 30 ° C. while stirring.

(4) Characteristics Table 1 shows the results of testing the above-mentioned various characteristics of each Example and Comparative Example.

Examples 5 and 6 Comparative Examples 3 and 4 [Treatment Hair Cream] In the method for producing the extract (1) blended in Example 1, hydrous methanol (concentration of methanol: 30 wt.
%) Was replaced with water, and 0.14 kg of the extract (2) was obtained in the same manner, except that reflux extraction was performed at a temperature of 100 ° C. for 3 hours. This extract (2)
Was used to prepare a treatment hair cream and various tests were carried out.

(1) Composition (2) Preparation method In the same manner as in Example 1, a treatment hair cream which is an emulsion type cosmetic is prepared.

(3) Characteristics Table 2 shows the results of various characteristics tested in the same manner as in Example 1.

As shown in Tables 1 and 2, the emulsified cosmetics of the present invention, such as the skin creams and hair treatment creams of Examples 1 to 6, contained the camellia seed degreased extract in an amount of 0.1 based on the total amount of the composition. By blending up to 5.0 wt%, it is excellent in various characteristics as compared with Comparative Examples 1 to 4. That is, it is clear that the water or hydrous lower alcohol extract of defatted camellia seeds has a function of an emulsifier and a moisturizer without causing skin irritation when blended in a predetermined amount in an emulsified cosmetic composition. Also, in particular, the hair treatment creams of Examples 5 and 6 were applied to hair and scalp,
It has an appropriate moisturizing effect to make the hair supple and to prevent dandruff caused by dry scalp.

(Effects of the Invention) As described above, the emulsion cosmetic of the present invention has no skin irritation, is excellent in emulsion stability, and feels and moisturizes during use, and is highly useful.

Claims (1)

[Claims] 1. An emulsified cosmetic comprising a water extract or a hydrous lower alcohol extract of a defatted camellia (Camellia Japonica Linn) seed defatted product.