JPS6087206A - Translucent cosmetic - Google Patents

Abstract

PURPOSE:To produce a translucent cosmetic stable over a wide temperature range, by adding a fatty acid polybasic acid polyglycerol ester having surface active action to a system having a specific (alcohol)/(water+alcohol) ratio. CONSTITUTION:The objective translucent cosmetic can be produced by adding a fatty acid polybasic acid polyglycerol ester in an amount of 0.01-5wt% to a water-alcohol system having a weight ratio [alcohol/(water+alcohol)] of 0.01- 0.4, preferably 0.05-0.3. The polyglycerol used as a nucleus of the above ester is preferably the one polymerized at the alpha-position and having a polymerization degree of 3-15. The fatty acid is 8-30C straight- or branched-chain saturated or unsaturated fatty acid, and the polybasic acid is e.g. succinic acid, sulfuric acid, etc. The obtained translucent cosmetic can keep the translucent state stably for a long period at -10-+80 deg.C without causing the precipitation, separation or clouding.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cosmetic material that is translucent in appearance, and more specifically, a cosmetic composition containing a fatty acid polybasic acid polyglycerin ester that has a surfactant effect in an alcohol/(water-earth alcohol) -electricity ratio system. This invention relates to a novel translucent cosmetic containing a specific amount.

BACKGROUND ART Conventionally, hydroalcoholic cosmetics consisting of water, alcohol, humectants, etc. have been widely used in lotions, hair conditioners, shaving lotion, etc., but most of them are transparent in appearance. In a few cases, there are cases where there is a difference but it is not transparent, and this becomes 2=4#(
(oil phase, water phase, etc.) is shaken during use to temporarily make it cloudy.

Translucent water/alcohol-based cosmetics are generally unstable, and so far no one has been found that is sufficiently stable over a wide temperature range.

To make transparent water/alcohol-based cosmetics, various general-purpose polyoxyethylene-added hydrophilic surfactants can be used, and their adjustment is easy. However, translucent water/alcohol-based cosmetics are difficult to adjust. This is because depending on the surfactant used, it may become cloudy due to the cloud point phenomenon at high temperatures, or it may precipitate at low temperatures, making translucent makeup sufficiently stable over a wide temperature range. This is because they could not get any money.

In view of this situation, the present inventors conducted intensive research and succeeded in developing a translucent cosmetic that is stable over a wide temperature range.

That is, the present invention provides alcohol/(water-soil alcohol)
In a water/alcohol system with a weight ratio of 0.01 to 0.04, fatty acid polybasic acid polyglycerin ester is added to 0.01
It is a translucent cosmetic containing ~5% by weight.

Such translucent cosmetics can stably maintain a translucent state for a long period of time in a wide temperature range of -10°C to 80'C, and do not cause precipitation, separation, or clouding. Furthermore, the cosmetic composition of the present invention has a refreshing feeling on the skin and an astringent effect on the skin due to the alcohol content.

In the present invention, the alcohol system constituting the water-alcohol system, for example, ethanol, has a weight ratio of alcohol/(water-earth alcohol) of 0.01 to 0.4. The ratio is 0
．． When it is less than 01, it becomes cloudy or transparent depending on the amount of fatty acid polybasic acid polyglycerol ester, and when it exceeds 04, precipitation of fatty acid polybasic acid polyglycerol ester occurs. The preferred range of this ratio is 005-03.

Here, for the purpose of understanding the fatty acid polybasic acid polyglycerol ester used in the present invention, the general formula for a completely linear polyglycerol ester in which all of the polyglycerin cores are polymerized at the α-position is shown as follows. It becomes like this.

OR20R30Rn In the above general formula, n -2 to 20, R1, R2
...One is a fatty acid residue having 8 or more carbon atoms, and at least one other is a polybasic acid residue or a polybasic acid salt residue.

The core polyglycerin of the fatty acid polybasic acid polyglycerin ester has a degree of polymerization of 2 to 15, preferably 3 to 5. Furthermore, those with a high degree of polymerization are difficult to obtain because the viscosity of the system increases during synthesis, making it difficult for the reaction to proceed.

Further, from the viewpoint of reactivity, the above-mentioned polyglycerin is generally condensed at the α position, but it may be condensed at the β position, that is, it may be a branched polyglycerin.

The fatty acids constituting the fatty acid polybasic acid polyglycerol ester used in the present invention include linear saturated and unsaturated fatty acids having 8 to 30 carbon atoms, and saturated and unsaturated fatty acids having side chains, such as capric acid.・Lauric acid, myristic acid, palmitic acid 1 stearic acid, behenic acid, cerotic acid, palmitoleic acid, oleic acid, isopalmitic acid 1 isostearic acid, hydroxystearic acid, linoleic acid, lysyllic acid, ricinoleic acid, lysyllic acid, abietic acid etc.

The number of moles of fatty acid added to polyglycerin can be poly, but at least 1 mole must be added, and 1 mole must be added.
Most preferred are molar additions.

(Left below) The polybasic acids constituting the fatty acid polyglycerol ester used in the present invention include succinic acid, glutaric acid, adipic acid, maleic acid, malic acid, and alcohol polybasic acid. It can be arbitrarily selected while taking into account the number of hydroxyl groups and the number of fatty acid residues, but at least 1 mole or more must be added.

The fatty acid polybasic acid polyglycerin ester of the present invention can be blended into cosmetics as it is, but it can also be used by neutralizing the polybasic acid residues with a basic substance to further increase the HLB.

Basic substances that neutralize polybasic acid residues include organic amines such as sodium hydroxide, potassium hydroxide, and lithium hydroxide, organic amines such as ricinolamine and isopropanolamine, and arginine and lysine. Basic amino acids such as Neutralization of polybasic acid residues with a basic substance may be partial neutralization or complete neutralization. In addition, neutralization may be carried out to make a fatty acid polybasic acid polyglycerin ester salt and then blended into cosmetics, or the fatty acid polybasic acid polyglycerin is blended in the alcohol phase and the basic acid is added to the aqueous phase. Neutralization may be performed during the manufacturing process of cosmetics, such as by blending substances and neutralizing them during mixing.

The above fatty acid polybasic acid polyglycerin ester is generally synthesized by the following method. That is, polyglycerin is converted into a fatty acid ester under an alkali catalyst at a temperature of about 30° C. to 250° C. (preferably 180° C. to 230° C.). Next, this product is reacted with an acid anhydride at around 30°C, or under an alkali catalyst, at about Esterification is performed with acid to obtain the target fatty acid polybasic acid polyglycerin ester. Furthermore, if this product is neutralized or partially neutralized with a basic substance, a fatty acid polybasic acid polyglycerin ester salt can be obtained.

In order to explain the above synthesis method in more detail, specific synthesis examples are given below. The present invention is not limited thereby.

Synthesis Example 1 Monolauric acid disuccinic acid decaglycerin ester 152 g of decaglycerin, 405 q of lauric acid, and 152 g of decaglycerin, 405 q of lauric acid and
Add sodium hydroxide and heat to 200 to 230°C with stirring while blowing nitrogen gas. When the amount of distilled water reaches about 3.3 liters, the reaction is stopped by cooling to room temperature.

Next, succinic anhydride co and og were added and stirred at 80 to 110°C for about 2 hours while blowing nitrogen gas to obtain monolaurate disuccinate decaglycerin ester.

This product was paste-like at room temperature and had an acid value of 105.4.

0 Synthesis Example 2 Uric acid disuccinic acid hexaglycerin ester Using the same apparatus as in Synthesis Example 1, hexaglycerin 13
Add 6g of a, 601g of lauric acid, and 012g of sodium hydroxide and heat to 200~ while blowing nitrogen gas.
Heat and stir to 230°C. Water distillation amount is approximately 5.0
When the temperature reaches 4, cool to room temperature and stop the reaction.

Then, 601 g of succinic anhydride was added and stirred at 580 to 110° C. for about 2 hours while blowing nitrogen gas to obtain monolauric acid disuccinic acid hexaglycerin ester. This product was liquid at room temperature and had an acid value of 13a1.

(Left below) Synthesis Ji[3 Monoisostearic acid monosuccinic acid decaglycerin Using the same apparatus as in Synthesis Example 1, decaglycerin gga5
g, isostearic acid (manufactured by Emery) 86.2q,
Add 0.25 liters of sodium hydroxide and add 2 ml under nitrogen stream.
Heat and stir at 00 to 230'C. When the amount of water distilled out is about 5 -, cool to room temperature to stop the reaction ◇ Then, add 3 L of succinic anhydride (4 g) and heat to 80 - 1 under nitrogen stream.
Stirring was performed at 20°C for about 2 hours to obtain decaglycerin monoisostearate monosuccinate. This product was paste-like at room temperature and had an acid value of 50.5.

(The following is a blank space) 11 Among the above-mentioned fatty acid polybasic acid polyglycerol esters, it is particularly preferred from the viewpoint of stability over time of translucent cosmetics that can be obtained in the form of liquid or paste at room temperature. The blending amount is 0.01 to 5% by weight, preferably 0.1 to 3% by weight based on the total amount.

If 0.01% by weight is not added, it will become cloudy or precipitate depending on the ratio of alcohol/(water-earth alcohol). If it exceeds 5% by weight, fatty acid polybasic acid polyglycerin ester will precipitate.

In the present invention, "semi-transparent" refers to a material having a transparency range of 20 to 95 when the transparency of water is 100.

Generally speaking, transparent cosmetics have a transparency level of 95 or higher.
The milk-like cloudy emulsion has a transparency of 15 or less.

The translucent cosmetics of the present invention may contain other ingredients as necessary, such as other surfactants, fragrances, colorants, humectants, preservatives, water-soluble polymer substances, oils, etc. can be blended.

Hereinafter, the present invention will be explained by examples.

JP-A-Sho Go-87206 (4) Example 1 Monoisostearic acid monosuccinic acid hexaglycerin 0
Mix 5% by weight of ethanol and 5% by weight of ethanol, stir to dissolve uniformly, and add 94.5% by weight of ion-exchanged water to this mixture.
was added and homogenized to obtain a translucent cosmetic. These operations were performed at room temperature. The obtained cosmetic has a transparent skin, stability (
After one month), the condition was good and no precipitation was observed.

Examples 2 to 5 and Comparative Examples 1 to 4 Translucent cosmetics were made in the same manner as in Example 1 using the raw materials shown in the table below. The obtained cosmetic exhibited transparency and stability as shown in the table below.

In addition, Example 1 is reprinted in the table.

(The following is a blank space) 3 (A) A: Monooleic acid monosuccinic acid decaglycerin B: Polyoxyethylene behenyl alcohol ether C: Ethanol D: Ion exchange water ratio: Alcohol/(water-earth alcohol) weight ratio (hereinafter a blank space) 4 Examples 6 The following raw materials were prepared.

Ethano-AI 10.0% by weight Preservative 0.1 Dipropylene glycol 5.0 Ion-exchanged water Remainder First, all the raw materials except for the ion-exchanged water were mixed together and stirred to obtain a homogeneous liquid. Ion-exchanged water was added and homogenized to obtain a translucent refreshing lotion. All these operations were performed at room temperature 〇Example? A translucent hair tonic was prepared from the following raw materials in the same manner as in Example 6.

Ethanol 40% by weight Monoisostearate Monosuccinate Decaglycerin 3 Flavor α1 Propylene glycol 10 Disinfectant αO5 15 1-Menthol 0.005 Ion exchange water Remaining Example 8 The following raw materials were prepared.

■Ethanol 25% by weight ■Fragrance 0.05 ■Methylcellulose 01 ■Glycerin 2 ■Anti-inflammatory agent 0.05 ■Ion-exchanged water The remainder First, ■~■ were mixed together and stirred to obtain a homogeneous solution. Separately, ① to ② were thoroughly stirred together to obtain a liquid.

Both solutions were combined and homogenized to obtain a translucent mild shaving lotion.

Example 9 ■ Ethanol 20% by weight ■ Monooleic acid disuccinate decagly7rin 05■
Fragrance 01 ■ Carboball 941 0.2 ■ Preservative 0.1 ■ Dye Appropriate amount■ Ion-exchanged water Remainder■ Triethanolamine ol First, mix and stir ■～■, then add the homogenized solution of ■～■ to this mixture. added. ■ was added to the resulting mixed solution to neutralize and thicken it to obtain a translucent jelly cosmetic.

Patent applicant Shiseido Co., Ltd.

Claims (1)

[Claims] The weight ratio of alcohol/(water-soil alcohol) is 001-0
．． A translucent cosmetic comprising 0.01 to 5% by weight of a fatty acid polybasic acid polyglycerin ester in the hydroalcoholic cosmetic described in No. 4.