JPH1149639A - Emulsion composition of pearly luster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition, spread well over the skin, excellent in feeling when applied, and also excellent in storage stability and safety by including an agent for providing pearly luster, specific non-ionic surfactant, specific oil component and water. SOLUTION: This composition is obtained by including (A) an agent for providing pearly luster (e.g. ethylene glycol stearate), (B) a non-ionic surfactant having an HLB value of below 10 (e.g. glycerol/fatty acid ester), (C) an oil component other than the component A (e.g. octamethyl cyclotetrasiloxane), and (D) water. The preferable concentrations of these components are A: 0.1 to 40 wt.%, B: 0.1 to 40 wt.% and C: 0.1 to 80 wt.%, based on the whole composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pearly luster emulsifying composition, and more particularly to a cleansing cream which has good spreadability upon application to the skin, has an excellent feeling upon use, and has good storage stability and safety. The present invention relates to a pearly luster emulsified composition useful as a cosmetic such as a massage cream.

[0002]

2. Description of the Related Art A conventionally known emulsion composition having a pearly luster is prepared by mixing stearic acid as a solid fatty acid in an oil phase and potassium hydroxide as an alkali agent in an aqueous phase. At this time, the emulsified composition obtained by promoting emulsification by a part of an alkali metal salt of a fatty acid is of a burnishing type exhibiting a pearly luster. For example, cosmetics having a pearly luster comprising a crystalline ester and a hydrophilic surfactant (Japanese Patent Publication No. 60-26764) have been proposed.

[0003]

In the case of a pearlescent luster emulsion composition of the burnishing type, the precipitation of fatty acid crystals which cause pearly luster is closely related to the stability of the product. On the other hand, when stability is regarded as important, there is a problem that precipitation is suppressed and pearly luster becomes insufficient. This is a factor that requires strict manufacturing conditions, and also has an adverse effect on productivity. The degree of fatty acid crystal precipitation greatly affects the feeling of use of the product, such as stickiness, spreading, and conformity, and is also problematic in this respect. Furthermore, since an alkali metal salt of a fatty acid is used, irritation to the skin during use is also a concern. With regard to cosmetics having a pearly luster in which a crystalline ester and a hydrophilic surfactant are blended (Japanese Patent Publication No. 60-26764), they are not yet sufficiently satisfactory in terms of usability. Under the circumstances as described above, the cleansing cream has good spreadability when applied to the skin, has an excellent feeling in use, and has good storage stability and safety.
The appearance of a pearly luster emulsified composition useful as a cosmetic such as a massage cream has been desired.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies on such a background, and as a result, a pearly luster emulsified composition having the following constitution has solved all of the above problems. The inventors have found that the present invention has been completed.

That is, the present invention excludes a pearlescent agent as the component (A), a nonionic surfactant having an HLB value of less than 10 as the component (B), and a pearlescent agent as the component (C). It is a pearly luster emulsified composition containing water as an oil component and component (D).

BEST MODE FOR CARRYING OUT THE INVENTION

The pearly luster as the component (A) used in the present invention includes, for example, ethylene glycol distearate, ethylene glycol monostearate, ethylene glycol dipalmitate, ethylene glycol monopalmitate, ethylene dibehenate Glycol, ethylene glycol monobehenate, diethylene glycol distearate, diethylene glycol monostearate, diethylene glycol dipalmitate, fatty acid glycol esters such as diethylene glycol monopalmitate, diethylene glycol dibehenate, diethylene glycol monobehenate, dodecyl myristate, tetradecyl myristate, hexadecyl myristate Octadecyl myristate, eicosyl myristate, dodecyl palmitate Fatty acids such as tetradecyl palmitate, hexadecyl palmitate, octadecyl palmitate, eicosyl palmitate, dodecyl stearate, tetradecyl stearate, octadecyl stearate, eicosyl stearate, dodecyl behenate, tetradecyl behenate, octadecyl behenate, eicosyl behenate Monohydric alcohol esters and the like. These are used singly or in combination of two or more, and are usually 0.1 to 40% by weight (hereinafter simply referred to as%), preferably 1 to 30% by weight, based on the total composition of the pearly luster emulsified composition of the present invention. %.

H as the component (B) used in the present invention
The nonionic surfactant having an LB value of less than 10 is, for example,
Polyethylene glycol fatty acid ester (excluding diethylene glycol fatty acid ester), polyoxyethylene sorbite fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid ester, polyoxyethylene alkyl ether, Polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene sorbit beeswax, polyoxyethylene glycerin fatty acid ester, polyoxyethylene trimethylolpropane fatty acid ester, polyglycerin fatty acid ester, glycerin fatty acid ester, sorbitan fatty acid ester, propylene glycol fatty acid ester, etc. Among them, those having an HLB value of less than 10. When these are used in combination of two or more, mixed HLB
Those having a value of less than 10 can be mentioned. Especially,
The HLB value of a single or combination suitable for cleansing cosmetics, massage cosmetics and the like which can be removed with water alone without tissue off is less than 10 and 7 or more. These nonionic surfactants are usually used in an amount of from 0.1 to 40%, preferably from 1 to 40%, based on the total composition of the pearly luster emulsion composition of the present invention.
It is blended in the range of ~ 30%.

[0008] The oil component excluding the pearlescent agent as the component (C) used in the present invention may be an oil component usually used in cosmetics, pharmaceuticals and the like excluding the pearlescent agent. Examples thereof include silicone oils, hydrocarbons, higher alcohol higher fatty acid esters, higher alcohols, higher fatty acids, animal and vegetable fats and oils, cholesterol fatty acid esters, and fragrances. It is used in combination of more than one kind, and preferably includes silicone oil such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and methylpolysiloxane (viscosity at 25 ° C. is 300 cs or less). Such an oil component is usually blended in an amount of 0.1 to 80%, preferably 5 to 60%, based on the whole composition of the emulsified composition of the present invention.

The amount of water as component (D) can be appropriately selected according to the purpose of use of the present invention and appropriate physical properties.

[0010] In the present invention, furthermore, a medicinal agent, a moisturizing component, an effective inflammatory agent, a bactericide, a preservative, an ultraviolet absorber, an antioxidant, an organic and inorganic powder, which are generally used in cosmetics, pharmaceuticals,
Dyes and the like can be added as needed.

[0011]

The present invention will be described below with reference to examples.
Prior to that, the evaluation method is shown. Note that the present invention is not limited to these examples.

Evaluation method (Pearl-like luster) The prototype was evaluated by visual observation according to the following criteria.

(Stability) The prototype was placed in a thermostat at 20 ° C. and 40 ° C., and evaluated by visual observation after 6 months according to the following criteria.

(Feeling of Use) After 20 women (panelers) used the product continuously for one week, the quality of the feeling of use (fitting, growth) was evaluated according to the following criteria.

(Safety) Patch Test A 0.05 g sample was closed on the skin of the flexed side of the forearm of 25 subjects using a patch test patch with a circular lint cloth having a diameter of 1.0 for 24 hours. After sticking, it was evaluated according to the following criteria. As a result, the stronger reaction was adopted between 1 hour and 24 hours after bandage removal, and the evaluation was (±).
The above is indicated by the number of people.

Examples 1 and 2 and Comparative Examples 1 and 2 (Cleansing Cream) The cleansing creams shown in Table 1 were prepared by the following production methods. (Manufacturing method) Each component in the table is heated and mixed at 80 ° C.
This is stirred and cooled to near room temperature, and each cleansing clean
Get This was used as a sample and evaluated according to the above evaluation method. Table 1 shows the results. In addition, polyoxyethylene glyceryl triisostearate (10EO),
The HLB value of each of polyoxyethylene glyceryl triisostearate (20 EO), polyoxyethylene glyceryl triisostearate (30 EO), and polyoxyethylene glyceryl triisostearate (40 EO) is 3 , 7, 10, and 11.

[0017]

[Table 1]

From Table 1, it can be seen that the product of the present invention had a pearly luster milky white cream immediately after its preparation, and was very good in spreading and adaptability.

Example 3, Comparative Example 3 (weakly oily cream) A weakly oily cream was prepared by heating, dissolving, mixing and stirring and cooling all the components having the compositions shown in Table 2.
In addition, polyoxyethylene hydrogenated castor oil (10E.
O. ), Polyoxyethylene hydrogenated castor oil (60E.
O. ) Each HLB value is 6,14, and the HLB value of the nonionic surfactant according to the combination of Table 2 is 7.6.

[0020]

[Table 2]

The slightly oily cream of Example 3 exhibited a pearly luster immediately after preparation, was excellent in storage stability, had good spreadability and familiarity when used, and was also excellent in safety.

Example 4 and Comparative Example 4 (Massage Cream) A massage cream was prepared by subjecting all components having the composition shown in Table 3 to heat-dissolution, mixing, stirring, and cooling operations. In addition, polyoxyethylene monostearate (5E.
O. ), Polyoxyethylene monostearate (10
E. FIG. O. ) Each HLB value is 7, 11 and the mixed HLB value of the nonionic surfactant by combination of Table 3 is 8.2.

[0023]

[Table 3]

The massage cream of Example 4 has a pearly luster immediately after preparation, has good spreadability and conformity at the time of use, is not sticky, can be sufficiently washed away with water after use, and has good storage stability. It was excellent. One comparative example
The cosmetic of 4 does not show pearly luster and becomes milky milky,
Satisfaction of growth and familiarity was not obtained during use.

[0025]

As described above, the pearly luster emulsified composition of the present invention has good spreadability when applied to the skin, has an excellent feeling in use, and has excellent storage stability and safety.

Claims (2)

[Claims] 1. A pearlescent agent as a component (A), a nonionic surfactant having an HLB value of less than 10 as a component (B), an oil component excluding a pearlescent agent as a component (C), a component A pearly luster emulsified composition containing water as (D). 2. The pearlescent emulsified composition according to claim 1, wherein the mixed HLB value is less than 10 when two or more nonionic surfactants are contained.