JPH01175917A - Lipophilic type emulsified cosmetic - Google Patents

Abstract

PURPOSE:To obtain the title cosmetic, having improved stability and excellent feeling of use, by successively adding an amino acid-containing aqueous solution, metallic soap-containing oily phase and water to a lipophilic type nonionic surfactant at ambient temperature while stirring. CONSTITUTION:A lipophilic type emulsified cosmetic obtained by adding (B) an aqueous solution containing an amino acid and/or salt thereof, preferably L-serine or glutamic acid to (A) a lipophilic type nonionic surfactant (e.g., glyceryl monoisostearate) at ambient temperature (1-45 deg.C) while stirring, adding (C) a metallic soap (preferably zinc stearate) and an oily phase containing an oil (e.g., liquid paraffin) which is a liquid at ambient temperature and a volatile oil to the resultant solution while stirring and further adding water thereto while stirring. The above-mentioned cosmetic is capable of increasing the amount of blended aqueous phase components and blending a large amount of the volatile oil, further stable blending of a substance readily damaged by heat and emulsifying a liquid oil unstable to heat.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a lipophilic emulsified cosmetic that is stable and has an excellent feel when used. More specifically, by preparing at room temperature, it is possible to increase the amount of aqueous phase components and incorporate a large amount of volatile oil, and it has good stability and ease of use. To create a lipophilic emulsified cosmetic that can be stably blended and even emulsify heat-labile liquid oils.

[Prior Art] Conventionally, the method for preparing an emulsified composition has been to raise the temperature of the aqueous phase and oil phase to a high temperature of 70°C to 90°C, mix them, and then cool them through heat-retaining stirring. Common.

In addition, lipophilic emulsified cosmetics can evenly cover the skin surface in a thin film, and can be used for moisturizing and emollient properties.
It is said to be highly effective in preventing skin irritation.

In addition, as a makeup cosmetic, it has the characteristic of minimizing makeup fading due to its warm water properties.

[Problems to be Solved by the Invention] However, lipophilic emulsified cosmetics have disadvantages such as poor spreadability on the skin surface, weight, and stickiness and glare when used. had. In addition, in order to obtain a stable lipophilic emulsified cosmetic, it is necessary to increase the hardness even at the expense of some usability.

Furthermore, when blending thermophobic substances into cosmetics, it has been difficult to blend them into cosmetics because they are subject to decomposition, deterioration, denaturation, etc. due to heating during emulsification.

Furthermore, even if the additive is added at a low temperature during the cooling process in order to avoid decomposition, deterioration, denaturation, etc., the dispersion may be non-uniform or it may be difficult to achieve stable blending.

[Means for Solving the Problems] As a result of studying the means to solve these problems, the present inventors found that an aqueous solution of an amino acid and/or an amino acid salt was added to a lipophilic nonionic surfactant at room temperature. to which a metal soap and an oil phase containing an oil and/or volatile oil that is liquid at room temperature are added with stirring, and then water is added with stirring. It was discovered that oil-type emulsified cosmetics have high stability, and the present invention was completed. Moreover, since the lipophilic emulsified cosmetic of the present invention can contain a large amount of volatile silicone oil and aqueous phase components, it has a light feel when used, which conventional lipophilic emulsified cosmetics did not have. A good feeling of use can be obtained.

The lipophilic nonionic surfactants used in the present invention are glyceryl monoisostearate and diglyceryl monostearate. A lipophilic emulsified cosmetic can be obtained by gelling and/or emulsifying at room temperature such as °C.

Furthermore, the amino acids and/or amino acid salts used in the present invention may be of any type as long as they are normally used in the production of cosmetics, but specific examples include aspartic acid, glutamic acid,
These include serine, arginine, threonine, tryptophan, glycine, alanine, methionine, lysine, etc., but preferably L-serine, glutamic acid and/or salts thereof.

Examples of the metal soap include aluminum stearate, magnesium stearate, zinc stearate, calcium stearate, zinc undecylenate, etc., and zinc stearate or zinc undecylenate is preferred.

The oil may be any oil that is used as a cosmetic raw material and forms a residue at room temperature, but preferably liquid paraffin,
Hydrocarbons such as squalane.

In addition, in this invention, room temperature refers to 1 degreeC - 40 degreeC.

Further, the volatile oil used in the present invention may be any conventionally used volatile oil, but specifically, volatile silicone oils such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and octamethylcyclooctasiloxane are preferred.

The amount of nonionic surfactant used in the present invention is 1-10
%, preferably 3 to 7%. If it is less than 1%, emulsification is difficult, and even if it is more than 10%, oil leaching, separation, etc. may occur, which is not preferable.

Further, the blending amount of amino acids is 0.1 to 10%, preferably 1 to 5%. If it is less than 0.1%, the stability of emulsification is poor, and even if it is added more than 10%, the effect will not be enhanced and it is uneconomical.

The amount of metal soap blended is 0.01 to 10%, preferably
It is 0.1 to 4%. If it is less than 0.01%, the emulsification will not be stable, and if it is more than 10%, the effect will not be enhanced and it is uneconomical.

Furthermore, the amount of volatile silicone oil is 0.1 to 40%.
It is.

The formulation can be varied within the above range depending on the intended feeling of use.

Further, the temperature of the described cosmetic from the series of gelling and/or emulsifying processes to the end is 1°C to 50°C, preferably 10°C to 30°C.

In addition, the lipophilic emulsified cosmetic composition of the present invention may contain ingredients generally used in cosmetics within a range that does not impair the effects of the present invention. For example, as aqueous phase components, sodium hyaluronate, pyrrolidone Carboxylic acids, acidic mucopolysaccharides, water-soluble collagen, thickeners, etc., liquid oils that are unstable to heat as oil phase components, and if necessary, coloring materials such as inorganic pigments and organic pigments, ultraviolet absorbers, Surfactants such as ultraviolet blockers, cationic surfactants, anionic surfactants, nonionic surfactants, and amphoteric surfactants, vitamins, drugs such as glycyrrhizin derivatives, astringents, antioxidants, and preservatives. , fragrances, pH adjusters, heat-unstable effective additives, etc. can be added to the lipophilic emulsified cosmetic composition of the present invention.

[Example] The present invention will be explained in detail by examples, but the present invention is not limited to the examples. The amount is %.

Example 1 Emulsified foundation ■ Glyceryl monoisostearate 5.0 ■ Sodium L-glutamate 2.0 ■ Liquid paraffin (
70cs) 5.0 Octamethylcyclotetrasiloxane 12.0 ■ Zinc stearate 2.0 ■ Mixed pigment (manufacturing method of Example 1) Dissolve ■ in some Wa water and add to ■ while stirring. do. Add ■ and ■ to this while stirring, and leave the remaining ■
A mixture of (1) and (2) dispersed therein is further added while stirring to emulsify and disperse to obtain the desired emulsified foundation.

(Results) The emulsified foundation obtained in Example 1 had good makeup feel, spreadability, light feel, etc.
and showed good stability over time.

Example 2 Cream ■ Glyceryl monoisostearate 3.0 ■ Sodium monoglutamate 4.0 Example 3 Emulsion Example 4 Sunscreen L diglyceryl monostearate 2.0 ■ Diglyceryl monostearate 6.0 ■ L -Serine
4.0■ Weir pigment (manufacturing method of implementation r142-5) Dissolve (1) in part of the purified water of (2), and add to (2) while stirring. Add (1) to this while stirring, and then add the remaining (2) while stirring to obtain the desired emulsified composition.

(Results) In Examples 2 to 5 as well, good emulsified cosmetics were obtained that exhibited good feeling in use and stability over time.

[Effects of the Invention] Since the lipophilic emulsified cosmetic produced by the present invention gels or emulsifies at low temperatures, one of its features is that it can contain a large amount of unstable volatile silicone oil and aqueous phase components. Therefore, it has a light feel when used, and can provide a better feel when used compared to lipophilic emulsified cosmetics produced by conventional emulsification methods.

The effects of the present invention will be explained in detail below using experimental examples. The experimental examples are Example 1 and the four comparative examples shown below.
The stability and feeling of use were examined. Regarding the results of the experiment, the stability results are shown in Table 1, and the results of the feeling of use are shown in Table 2.
It was shown to.

[Comparative Example] The blending amounts in Comparative Examples are weight %. The evaluation method adopted prior to the comparative example will be explained.

(Stability) The prepared lipophilic emulsified cosmetic was left in a constant temperature bath at 5°C, room temperature, and 40°C, and its stability after a certain period of time was evaluated according to the following evaluation criteria.

Good
O Oil or water leakage is seen.
6 separation
× (Feel in use) Using 15 male and female panels, the feel in use was evaluated according to the following evaluation criteria.

10 or more people answered that it was better than the conventional one 06 to 9 people
65 people or less
× Comparative Example 1 Lipophilic emulsified foundation containing no volatile oil ■ Glyceryl monoisostearate 5.0 ■ L-
Sodium glutamate 2.00 Liquid paraffin (70 cs) 15.0 ■ Zinc stearate 2.00 Mixed pigment (manufacturing method) According to the method of Example 1, an emulsified foundation was prepared.

Comparative Example 2 Lipophilic emulsified fano-anion containing no metal soap ■Glyceryl monoisostearate 5.0 ■L-
Sodium glutamate 2.0 ■Mixed pigment (1m method) Dissolve (1) in some purified water and add to (2) while stirring. Add (2) to this while stirring, and add (2) dispersed in the remaining (2) with further stirring to emulsify and disperse to obtain the desired emulsified foundation.

Comparative Example 3 Lipophilic emulsified foundation that does not contain amino acids and their salts ■ Glyceryl monoisostearate 5.0 L cyclotetrasiloxane 12.0 ■ Mixed pigment (manufacturing method) ■ Dissolved in some purified water and heated to 80 ° C. Heat and stir, 8
Add to (2) heated to 0°C. 2 heated to 80° C. is added to this while stirring, 2 is dispersed in the remaining 2, and the mixture heated to 80° C. is further added with stirring to emulsify and disperse. Thereafter, the mixture is stirred and cooled to 30° C. to obtain the desired emulsified foundation.

Comparative Example 4 M water type emulsion foundation ■Stearic acid 2.0■Cetanol
2.00 liquid paraffin (70
cs) 20.0■POE (20) Sorbitan monooleate 2.0 ■Glyceryl monooleate 2.0■Montmorillonite 0.50 Triethanolamine 1.5■Mixed pigment (%1 method) Heat ■～■ to 80℃ The aqueous phase obtained by heating and stirring ① to ② to 80°C is added to the stirred oil phase with further stirring, and emulsified. Thereafter, the mixture is stirred and cooled to 30° C. to obtain the desired emulsified foundation.

Table 1 Stability Results Table 2 Results of Feeling in Use The lipophilic emulsified foundation that does not contain volatile oil shown in Comparative Example 1 has a stability of 8-8, but the feeling in use shows that it does not spread well. However, the drawbacks of lipophilic milk 1-hyphenate pusion become more obvious due to the lack of lightness.

The lipophilic emulsified foundation that does not contain metal soaps shown in Comparative Example 2 and the lipophilic emulsified foundation that does not contain amino acids and their salts shown in Comparative Example 3 are only slightly inferior to Example 1 in terms of feel when used. However, it was observed that the stability deteriorated over time.

The hydrophilic emulsion foundation shown in Comparative Example 4 is clearly inferior to Example 1 in terms of stability, and although it shows good results with a light feeling in use, it is inferior to Example 1 in terms of spreadability, poor fit, and makeup durability. It was clear that it was inferior to 1.

On the other hand, in Example 1 of the present invention, satisfactory results were obtained in both stability and feel during use.

Patent applicant: Nonokawa Shoji Ltd.

Claims (1)

[Claims] At room temperature, an aqueous solution containing an amino acid and/or an amino acid salt is added to a lipophilic nonionic surfactant while stirring, and an oil phase containing a metal soap, an oil that is liquid at room temperature, and a volatile oil is stirred. A lipophilic emulsified cosmetic obtained by adding water while stirring and then adding water while stirring.