JP4036313B2 - O / W cream emulsified cosmetic - Google Patents

Description

【００２１】
【表２】

【００２２】
表１、表２より、本発明による実施例１〜８のクリーム状乳化化粧料は、使用感、経時安定性のいずれも優れた性能を示した。一方、比較例１〜９のクリーム状乳化化粧料は、使用感、経時安定性の面でいずれかまたは、すべての点において不十分な結果であった。
【００２３】
【発明の効果】
本発明のＯ／Ｗ型クリーム状乳化化粧料は、安定性が良好で、使用感が良く、油性感が極めて弱くてさっぱりとした感触を有し、更に保湿効果が長時間持続する優れたものである。[0001]
[Industrial application fields]
The present invention relates to an O / W type emulsified cosmetic having good stability, good feeling in use, very weak oily feeling and refreshing feel, and having a moisturizing effect for a long time.
[0002]
[Prior art]
Creams and emulsions are used to moisturize and soften the skin. In general, creams have a greater amount of humectants such as oily components and polyhydric alcohols, and therefore have a greater effect than emulsions. However, recently, there is a tendency that the oily feeling is not preferred, and a weak oily cream having an oily component of about 20 to 30% is commercially available, but the oily feeling is still strong. Furthermore, there is a milky lotion with less oil component, and since it has less oil component, it feels less oily and feels refreshing, but the moisturizing effect does not last for a long time, especially during the dry season in winter. It is insufficient. If the blending amount of the polyhydric alcohol as a moisturizing agent is increased in order to improve the moisturizing property of the emulsion, problems such as emulsification become difficult and stability occurs such that separation occurs over time. This is because a large amount of polyhydric alcohol is added, the specific gravity of the water layer becomes high, the difference in specific gravity with the oil layer becomes large, and the emulsified particles are likely to float, and the creaming phenomenon and further separation of the water layer and the oil layer are prevented. This is because it occurs. As a method for improving the stability of an emulsion containing a large amount of a polyhydric alcohol with a low oil component amount such as an emulsion, a large amount of a solid oil component such as stearyl alcohol, stearic acid, waxes, etc., or a carboxyvinyl polymer There is a method of making a cream with almost no fluidity by blending a large amount of a water-soluble polymer such as, but there are the following problems. The blending of a large amount of solid oily components has a problem in stability, such as a bad feeling when used, such as heavy nose, and further solidification of these solid components at low temperatures. In addition, when a large amount of the water-soluble polymer is blended, the water-soluble polymer has a slimy feeling and the usability is poor. For this reason, there has been a demand for an emulsified cosmetic that has good stability, good usability, very weak oiliness and a refreshing feel, and further maintains a moisturizing effect for a long time.
[0003]
[Problems to be solved by the invention]
Therefore, in view of the above circumstances, the present inventor obtains an emulsified cosmetic having good stability, good feeling of use, a feeling of oiliness that is very weak and refreshing, and a moisturizing effect that lasts for a long time. For the purpose.
[0004]
[Means for solving problems]
As a result of diligent research to achieve the above object, the present inventor blended a large amount of polyglycerin, and by blending an appropriate amount of solid oily component and solid lipophilic emulsifier, the moisturizing effect lasts for a long time, And even if it reduced content of the oil-based component, it discovered that O / W type cream-like composition with high stability and a usability was obtained, and reached this invention.
[0005]
That is, the present invention contains 10 to 50% by weight of polyglycerol having an average degree of polymerization of 2 to 10, 5 to 20% by weight of an oily component, an emulsifier and water, and is solid at 25 ° C and solid at 25 ° C. One or two or more types selected from the lipophilic emulsifiers of 2 to 8% by weight are O / W type cream emulsified cosmetics.
[0006]
Hereinafter, the present invention will be described in detail. In the present invention, polyglycerin having an average degree of polymerization of 2 to 10 is used. Examples of such polyglycerin include diglycerin, triglycerin, tetraglycerin, hexaglycerin, decaglycerin and the like, and one or more of these are used. Of these polyglycerins, diglycerin is most preferred from the standpoint of stickiness when applied to the skin.
[0007]
In the present invention, the above polyglycerin is used in an amount of 10 to 50% by weight, preferably 10 to 25% by weight. If it is less than 10%, a stable cream cannot be maintained, and the durability of the moisturizing effect is deteriorated. If it exceeds 50%, the feeling when applied to the skin is heavy, which is not preferable.
[0008]
In addition, polyhydric alcohols other than polyglycerin such as glycerin, propylene glycol, dipropylene glycol, 1,3-butylene glycol, and sorbitol, which are usually used for the purpose of moisturizing effects in cosmetics, have only insufficient moisturizing effect. If the total amount of the oily component is 5 to 20% and the oily component solid at 25 ° C. and the lipophilic emulsifier solid at 25 ° C. is 2 to 8%, a stable cream composition can be obtained. If the total amount of the solid oily component and the solid lipophilic emulsifier exceeds 8%, a stable cream-like composition can be obtained, but the usability is extremely poor.
[0009]
The oily component used in the present invention is not particularly limited, and is a hydrocarbon such as squalane, liquid paraffin, solid paraffin, petroleum jelly, glyceryl trioctanoate, glyceryl tri (capryl / capric acid), olive oil, avocado oil, Triglycerides such as coconut oil, beef tallow, hydrogenated soybean oil, hydrogenated rapeseed oil, ester oils such as octyldodecyl myristate, isodecyl isononanoate, octyldodecyl erucate, waxes such as jojoba oil, beeswax, carnauba wax, stearic acid, Examples thereof include fatty acids such as palmitic acid and behenic acid, higher alcohols such as cetanol, stearyl alcohol and behenyl alcohol, silicone oils such as dimethylpolysiloxane, and the like, and one or more of these are used.
[0010]
In the present invention, the above oil component is used in an amount of 5 to 20% by weight, preferably 5 to 15% by weight, more preferably 5 to 10% by weight. If the oil component is less than 5%, a stable cream cannot be obtained, and the barrier property due to the oil component is lowered, so that the moisturizing effect cannot be maintained. On the other hand, if it exceeds 20%, the oily feeling is strong and undesirable.
[0011]
The emulsifier used in the present invention is not particularly limited, and polyglycerin fatty acid ester, glycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, propylene glycol fatty acid ester, poly One or two or more of oxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, phytosterol derivative, acyl glutamate, fatty acid soap and the like can be used.
[0012]
In the present invention, among the above oily components and emulsifiers, one or two or more selected from oily components solid at 25 ° C. and lipophilic emulsifiers solid at 25 ° C. are 2 to 8 wt%, preferably 4 to It is necessary to select 6% by weight. Solid oily components at 25 ° C. include saturated higher alcohols such as cetanol, stearyl alcohol and behenyl alcohol, saturated fatty acids such as stearic acid, palmitic acid and behenic acid, coconut oil, hydrogenated coconut oil, beef tallow, hydrogenated beef tallow, Solid animal and vegetable oils such as hardened soybean oil and hardened rapeseed oil, hardened oils, solid hydrocarbons such as solid paraffin and microcrystalline wax, solid waxes such as beeswax, carnauba wax, hydrogenated jojoba oil, myristic acid Solid ester oils such as myristyl, cetyl palmitate, cholesteryl stearate, polyoxyethylene cetyl ether stearate, polyoxyethylene stearyl ether stearate can be exemplified, and as a lipophilic emulsifier solid at 25 ° C. Glycerin monostearate, propylene Solid and lipophilic polyhydric alcohol fatty acid esters such as recall monostearate, ethylene glycol monostearate, sorbitan monostearate, sorbitan tristearate, tetraglycerin pentastearate, hexaglycerin pentastearate, batyl alcohol, etc. Examples of POE nonionic surfactants having an HLB of 5 or less such as alkyl glyceryl ethers, POE (3) cetyl ether, POE (5) behenyl ether, POE (3) stearyl ether, POE (5) cholesteryl ether, etc. it can. If the total amount of the solid oily component and the solid lipophilic emulsifier is less than 2%, a stable cream cannot be obtained.
[0013]
In the present invention, if the total amount of the oily component is 5 to 20% by weight and the oily component solid at 25 ° C. and the lipophilic emulsifier solid at 25 ° C. is in the range of 2 to 8% by weight, stability and use A creamy emulsified cosmetic with no problem in feeling can be obtained, but at 25 ° C., the solid oily component is solid at 25 ° C. with respect to the total weight of the oil phase consisting of the oil component and the lipophilic emulsifier added as necessary. The ratio of the weight of the solid component comprising the solid lipophilic emulsifier is more preferably 1: 0.2 to 0.7 in terms of stability and feeling of use.
[0014]
In addition, the O / W type cream emulsified cosmetic of the present invention includes components normally used in cosmetics, for example, a moisturizer such as a polyhydric alcohol other than polyglycerin, a dye, A fragrance, an anti-inflammatory effect, a cell activation, a drug having a whitening effect, an antiseptic, a bactericidal agent, an antioxidant, a pH adjuster, and the like can be appropriately blended.
[0015]
The cream-like composition of the present invention can be produced according to a conventional method, and can be obtained, for example, by emulsifying an aqueous phase and an oil phase using an emulsifier such as a homomixer.
[0016]
【Example】
EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.
[0017]
Examples 1-8, Comparative Examples 1-9
O / W type creamy emulsified cosmetics were prepared with the composition described in the table and evaluated based on the following evaluation criteria. The results are shown in Tables 1 and 2.
[0018]
(Manufacturing method) A hydrophilic component such as polyglycerin and hydrophilic surfactant, an aqueous phase component composed of water and an oil component, and an oil phase component such as a lipophilic surfactant are each heated to 80 ° C. and dissolved. While stirring the aqueous phase component with a homomixer, the oil phase component was gradually added to emulsify, and the mixture was stirred and cooled to room temperature.
[0019]
(Evaluation method and evaluation criteria)
1) Cream state The state of the compositions prepared in Examples and Comparative Examples was visually observed and evaluated based on the following evaluation criteria.
○: It is in a cream state. X: It is not in a cream state such as liquid. 2) Usability A cosmetic agent prepared in Examples and Comparative Examples is applied to 10 healthy female panelists in an appropriate amount on the face. Sensory evaluation was performed based on the following evaluation criteria for each item of “feel of slime”, “feel of oiliness”, and “moist feeling after 3 hours” as a moisturizing effect.
"Goodness of Novi""Smoothness"
◎: Good ◎: No sliminess ○: Slightly good ○: Slightly slim △: Slightly poor △: Slightly slimy ×: Poor ×: “Oil feeling” with slimy feeling “Moist after 3 hours” Sense
◎: There is no oiliness ◎: Very moist ○: There is almost no oiliness ○: Moisture △: Some oiliness △: Somewhat moist ×: Oiliness ×: Moist 3) Stability over time After the cosmetics prepared in Examples and Comparative Examples were left in a 50 ° C. thermostatic bath for 1 month and in a 5 ° C. thermostatic bath for 3 months, the state was visually observed and evaluated as follows. Evaluation was based on criteria.
○: No change in state ×: Change in state such as separation and crystallization [0020]
[Table 1]

[0021]
[Table 2]

[0022]
From Tables 1 and 2, the cream-like emulsified cosmetics of Examples 1 to 8 according to the present invention exhibited excellent performance in both feeling of use and stability over time. On the other hand, the creamy emulsified cosmetics of Comparative Examples 1 to 9 were insufficient in any or all of the points of usability and stability over time.
[0023]
【The invention's effect】
The O / W cream emulsified cosmetic of the present invention has excellent stability, good usability, extremely weak oily feeling and a refreshing feel, and further has a moisturizing effect that lasts for a long time. It is.

Claims (3)

Polyglycerin having an average degree of polymerization of 2 to 10 and containing 10 to 50% by weight of an oily component, 5 to 20% by weight of an oily component, an emulsifier and water, and selected from an oily component solid at 25 ° C and a lipophilic emulsifier solid at 25 ° C O / W type creamy emulsified cosmetics, characterized in that one or more of them are 2 to 8% by weight. The composition according to claim 1, wherein the oily component and the lipophilic emulsifier solid at 25 ° C and the oily emulsifier solid at 25 ° C with respect to the total weight of the oil phase comprising the oily component and the lipophilic emulsifier added as necessary. The O / W type cream emulsified cosmetic, wherein the ratio of the weight of the solid component is 1: 0.2 to 0.7. 3. The O / W type creamy emulsified cosmetic according to claim 1 or 2, wherein the polyglycerol is diglycerol.