JPH04334309A - Skin cosmetic composition - Google Patents

Abstract

PURPOSE:To provide a kin cosmetic composition giving little stickiness and oiliness immediately after application, forming a refreshing and smooth skin and capable of stably keeping the excellent feeling. CONSTITUTION:The objective skin cosmetic composition having the above effects can be produced by using (A) a polyether-modified liquid silicone oil component expressed by formula (R is acetoxy; m is integer of 10-500, especially 100-400; n is integer of 1-40, especially 3-20; a and b are integers of 0-30, especially 0-20) and (B) a branched higher fatty acid ester liquid oil component having a branched fatty acid group consisting of usually 8-35C, preferably 8-18C saturated or unsaturated fatty acid group and an alcohol group derived from a usually 3-32C, preferably 3-20C straight or branched-chain alcohol as essential components. The weight ratio (A/B) is (0.05-2)/1, preferably (0.1-1)/1 and amount of A+B is 1.0-30wt.%, preferably 2-20wt.% based on the total composition.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cosmetic composition which has a good feeling on use and is excellent in the durability of that good feeling on use.

0002

[Prior art and its problems] In recent years, there has been a demand for skin cosmetics that are less sticky and oily, have a refreshing, smooth, and light feel. . Conventionally, it has been known to add small amounts of oil or silicone oil with low surface tension to cosmetics in order to make them less sticky and oily, and to give them a refreshing and smooth feel. It is being However, products that contain a small amount of oil have the disadvantage that they do not provide a good feeling when used for long periods of time, and cannot be expected to have much skin care effect, resulting in a poor feeling of use. Furthermore, at present, it is relatively difficult to fully utilize silicone oil because silicone oil itself has poor compatibility with other oils and poor emulsifying properties, but its excellent properties have expanded its range of use. It's spreading. Among these silicone oils, particularly when cyclic silicone oil or low degree of polymerization dimethyl silicone oil is used, a good refreshing and smooth feeling can be obtained. However, these products do not provide a good feeling when used, and therefore have a poor feeling when used. Further, dimethyl silicone oil with a medium degree of polymerization and silicone oil modified by reacting with propylene oxide or ethylene oxide are not preferred because they have a strong sticky or oily feel immediately after use. For these reasons, at present, there is no cosmetic that has a low stickiness or oily feeling immediately after use, has a good refreshing and smooth feeling, and has a long-lasting good feeling on use.

0003

[Problems to be Solved by the Invention] The present invention provides a product that has less stickiness and oily feeling immediately after use, has a good refreshing and smooth feeling, and has excellent sustainability of the good refreshing and smooth feeling. Its objective is to provide skin cosmetics.

0004

[Means for Solving the Problems] The present inventors have conducted extensive research to solve the above problems, and as a result, have completed the present invention. That is, according to the present invention, a liquid polyether-modified silicone oil component (A) represented by the following general formula
Accordingly, there is provided a skin cosmetic composition which is characterized by containing a liquid higher branched fatty acid ester oil component (B) and which has a good feel when used.

[0005]

[Chemical formula 1]

(In the formula, R is an acetoxyl group, m is 10-
An integer of 500, n is an integer of 1 to 40, a is an integer of 0 to 30
and b are integers from 0 to 30)

[0007]
In particular, as the liquid polyether-modified silicone oil component A represented by the above general formula used in the present invention, m is 100
~400, n is 3-20, a is 0-20, b is 0-20
It is preferable to use a substance within the range of .

The liquid higher branched fatty acid ester oil used in the present invention may be any oil that is liquid at room temperature, and the branched fatty acid group may be a saturated or unsaturated fatty acid group, and the number of carbon atoms thereof is usually , 8-35, preferably 8-1
It is 8. On the other hand, the alcohol group in the liquid higher branched fatty acid ester oil is derived from a linear or branched alcohol, and usually has 3 to 32 carbon atoms, preferably 3 to 20 carbon atoms. The use of higher straight chain fatty acid ester oil is not preferable because it lacks a refreshing feeling.

Specific examples of the liquid higher branched fatty acid ester oil include isocetyl isomyristate, isopropyl isostearate, isocetyl isostearate, butyl isostearate, isostearyl isostearate, tridecyl isostearate, hexyldecyl isostearate, and isononane. Isononyl acid, tridecyl isononanoate, isooctyl isoperargonate,
Examples include cetyl isooctanoate. These materials may be used alone or as a mixture. The weight ratio of liquid polyether-modified silicone oil to liquid higher branched fatty acid ester oil is 0.05:1 to 2:1, preferably 0.1:
It is in the range of 1 to 1:1. In addition, the total amount of these components is 1 to 30% by weight, preferably 2 to 30% by weight based on the entire composition.
It is in the range of 20% by weight.

[0010] In the skin cosmetic composition of the present invention, if the proportion of the liquid polyether-modified silicone oil is too small than the above range, it will not be possible to provide a good feeling of use such as a refreshing feeling or a smooth feeling. On the other hand, if the ratio is too large, the stickiness and oily feel will be strong, and the light and good feel will be impaired. In addition, if the content of the liquid polyether-modified silicone oil and the liquid higher branched fatty acid ester oil in the entire composition is too small than the above range, it will give a refreshing feeling.
On the other hand, if it is too large than the above range, the stickiness and oiliness will become strong, which is not preferable.

In addition to the above-mentioned essential ingredients, the skin cosmetic composition of the present invention may contain, as necessary, emulsions such as milky lotions and creams, and additives commonly used in beauty serums, as long as they do not particularly impede the purpose of the present invention. For example, appropriate amounts of surfactants as emulsifiers and solubilizers, humectants, preservatives, bactericidal agents, vitamins, ultraviolet absorbers, anti-inflammatory agents, astringents, oils, viscosity regulators, pH regulators, etc. can do.

[0012] Among the skin cosmetic compositions of the present invention, especially emulsified compositions can be prepared by conventionally known emulsification methods. In this case, as the emulsifier, a lipophilic surfactant or a hydrophilic surfactant may be used alone or in combination. These surfactants include, for example, sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, and polyoxyethylene sorbitan fatty acid ester. Oxyethylene alkyl phenyl ether, polyoxyethylene hydrogenated castor oil, polyoxyethylene castor oil, etc. are preferably used. Furthermore, in transparent compositions used as beauty serums, etc., surfactants and the like are preferably used as solubilizers.

[0013]

[Effects of the Invention] The skin cosmetic composition of the present invention has extremely low stickiness and oily feeling, has a good refreshing feeling and smooth feeling, and has excellent durability of the good feeling when used. Therefore, the composition of the present invention is particularly suitable for use as skin cosmetics such as creams, milky lotions, and serums to be applied to the face, hands, body, and the like.

[0014]

EXAMPLES Next, the present invention will be explained in more detail with reference to examples. Note that the percentages shown below are percentages by weight.

Examples 1 to 3, Comparative Examples 1 to 5 Ingredients having the composition (wt%) shown in Table 1, 2.3% of sorbitan monostearate, and 4% of ethylene oxide of monostearic acid.
0 mole adduct 1.7%, carboxyvinyl polymer 0.
An oil-in-water emulsion containing 2% glycerin, 5% glycerin, and appropriate amounts of other preservatives, fragrances, and neutralizing agents was prepared and evaluated for its feeling of use and the durability of the feeling of use. The results are shown in Table 1. In this case, the evaluation criteria for the feeling of use and the sustainability of the feeling of use are as follows. [Feeling in use] ◎...Extremely good ○...Good △...Slightly poor ×...Poor [Persistence] After 6 hours of use, the feeling in use was evaluated according to the following criteria. ◎...Very good ○...Good △...Slightly poor ×...Poor In addition, PO, EO modified silicone *1 shown in Table 1
In the general formula, m=400, n=5, a=2
0, b=20, and PO, EO modified silicone *2 has m=100, n=
5, a=20, b=20.

[0016]

[Table 1]

As can be seen from the results shown in Table 1, in the case of the products of the present invention (Examples 1 to 3), immediately after use,
It has good non-stickiness and no oily feel, and also has a refreshing and smooth feeling. Especially when used in combination with cyclic silicone oil (decamethylcyclopentasiloxane), the smooth feeling immediately after use is even better. Ta. On the other hand, in Comparative Example 1, which combined ordinary ester oil and low polymerization degree dimethylsiloxane, the oily feeling was strong immediately after use.
Furthermore, regarding the durability of the feeling of use, the lack of oily feeling, refreshing feeling, and smooth feeling are unsatisfactory.
Comparative Example 2), the combination of liquid ester and PO, EO-modified silicone (Comparative Example 3) does not have an oily feeling immediately after use, does not have a refreshing feeling, and does not have a smooth smooth feeling, and the durability of the feeling after use is also unsatisfactory. . In addition, in Comparative Example 4, which did not contain liquid higher branched fatty acid ester oil, the smooth feeling did not last long, and in Comparative Example 5, in which low polymerization degree dimethyl silicone oil was used instead of PO, EO modified silicone, there was an oily feeling immediately after use. It was also unsatisfactory in terms of lack of oily feel and durability of smooth feeling.

Claims (3)

[Claims] 1. A skin cosmetic composition with a good feel when used, characterized by containing a liquid polyether-modified silicone oil component (A) represented by the following general formula and a liquid higher branched fatty acid ester oil component (B). thing. [Formula 1] (wherein R is an acetoxyl group, m is an integer of 10 to 500, n is an integer of 1 to 40, a is an integer of 0 to 30, and b
(indicates an integer from 0 to 30) 2. The skin cosmetic composition according to claim 1, wherein the weight ratio of component (A) to component (B) is in the range of 0.05:1 to 2:1. 3. The skin cosmetic composition according to claim 1, wherein the total amount of component (A) and component (B) is 1.0 to 30% by weight based on the entire composition.