JPH04288008A - Erythritol ester-containing cosmetic - Google Patents

Abstract

PURPOSE:To blend a cosmetic or the like with an erythritol ester as an oily base and an emulsifying agent. CONSTITUTION:A cosmetic or the like is blended with one or more erythritol esters comprising erythritol and 8-22C saturated or unsaturated straight-chain or side-chain fatty acid as an oily base and an emulsifying agent. A cosmetic blended with the erythritol ester has excellent touch to skin and slip.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cosmetics characterized by containing erythritol esters useful as oily bases and emulsifiers for cosmetics and the like.

[0002] In detail, erythritol and carbon number 8-2
The present invention relates to a cosmetic containing one or more esters of saturated or unsaturated linear or side chain fatty acids.

0003

BACKGROUND OF THE INVENTION Oily bases and emulsifiers incorporated into cosmetics play a very important role, and the ideal characteristics that oily bases and emulsifiers should generally have are as follows. In other words, it causes little skin irritation, feels good on the skin, spreads easily, has no color or odor and does not discolor or deteriorate over time, and is compatible with other parts of the body and interferes with the physiological functions of the skin. For example, there is no such thing.

Oil bases and emulsifiers used in cosmetics have traditionally been olive oil, camellia oil, castor oil,
Many natural fats and oils are used, such as cacao oil, squalane, and lanolin. Because it is a natural product, there are variations in ingredients, odor, and color between lots, and the quality is inconsistent. Therefore, various synthetic oil bases have been developed to improve the drawbacks of natural products. Furthermore, various synthetic emulsifiers and natural emulsifiers have been developed and used as emulsifiers for cosmetics.

However, even with synthetic oil bases and emulsifiers, there are problems such as skin irritation, moisture permeability in the skin, and skin respiration, and the current situation is that the ideal one has not yet been developed.

[0006]

OBJECTS OF THE INVENTION The present invention provides an oily base and an emulsifier that satisfy the characteristics required of an oily base and an emulsifier to be incorporated into cosmetics.

[0007]

[Means for Solving the Problems] The present inventors have conducted extensive research with the aim of developing oily bases and emulsifiers that have the characteristics required for cosmetic oily bases and emulsifiers, and have found that erythritol esters The present invention was completed by discovering an oily base and an emulsifier having the above-mentioned properties.

That is, the present invention relates to a cosmetic composition containing one or more esters of erythritol and a saturated or unsaturated linear or side chain fatty acid having 8 to 22 carbon atoms. .

The saturated or unsaturated linear or side chain fatty acids having 8 to 22 carbon atoms used in the present invention include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, Palmitoleic acid, oleic acid, erucic acid, linoleic acid, linolenic acid, 2-ethylhexylic acid, isostearic acid, 12-hydroxystearic acid, ricinoleic acid, and the like.

[0010] The erythritol ester of the present invention can be produced using a general esterification reaction method. Specifically, examples include a method of reacting a fatty acid chloride under a basic catalyst, and a method of esterification without a catalyst or in the presence of a suitable acid or alkali catalyst.

[0011] In carrying out the present invention, cosmetics may be produced by a conventional method by replacing all or part of conventional oily bases and emulsifiers with one or more of the above-mentioned erythritol esters.

The erythritol ester of the present invention can also be satisfactorily used as an emulsifier for foods such as margarine, whipped cream, coffee whitener, and beverages.

[0013] Next, the present invention will be explained with examples, but the present invention is not limited to the scope of these examples.

Example 1. Synthesis of erythritol monostearate

A 500 ml four-neck flask was charged with 100 g of erythritol and 224 g of stearic acid, and 0.3 g of NaOH was added as a catalyst. The temperature was raised while blowing nitrogen gas, and the reaction was carried out at 250° C. for 30 minutes while removing generated water. Immediately after the reaction, the reaction mixture was cooled to obtain about 300 g of a pale yellow solid.

Example 2. Synthesis of erythritol monooleate

A 500 ml four-neck flask was charged with 100 g of erythritol and 224 g of oleic acid, and 0.3 g of NaOH was added as a catalyst. Raise the temperature while blowing nitrogen gas, and heat at 250°C for 30 minutes while removing generated water.
The reaction was allowed to proceed for 0 minutes. Immediately after the reaction, the mixture was cooled to obtain about 300 g of a pale yellow semi-solid.

Example 3. Synthesis of erythol monoisostearate

A 500 ml four-necked flask was charged with 100 g of erythritol and 224 g of isostearic acid, and 0.3 g of NaOH was added as a catalyst. Raise the temperature while blowing in nitrogen gas, and heat to 250℃ while removing the generated water.
The reaction was carried out at ℃ for 2 hours. Immediately after the reaction, the mixture was cooled to obtain about 300 g of a pale yellow transparent liquid.

Example 4. Synthesis of erystol di-2-ethylhexylate ester

A 500 ml four-necked flask was charged with 62.5 g of erythritol and 300 g of 2-ethylhexylic acid, and the temperature was raised while blowing nitrogen gas. The reaction was carried out at 250° C. for 8 hours while removing generated water. After the reaction, unreacted 2-ethylhexylic acid was recovered under reduced pressure and cooled to obtain about 180 g of a yellow transparent liquid. After performing alkali purification, water washing, and dehydration, it was decolorized with activated carbon and deodorized under reduced pressure to obtain 150 g of an almost colorless transparent liquid.

Example 5. Synthesis of erythritol tristearate

A 500 ml four-necked flask was charged with 25 g of erythritol and 175 g of stearic acid, and 0.3 g of paratoluenesulfonic acid was charged as a catalyst, and the temperature was raised while blowing nitrogen gas. 2 while removing the water produced.
The reaction was carried out at 50°C for 8 hours. After the reaction, unreacted stearic acid was recovered under reduced pressure. Thereafter, it was cooled to obtain about 180 g of a yellow solid. After alkali purification, water washing, and dehydration, decolorization with activated carbon and deodorization under reduced pressure yielded a pale yellow solid 160
I got g.

Example 6. Table 1 shows the properties of the erythritol ester obtained by the present invention. The properties of glycerin ester are also shown for comparison.

[0025]

[Table 1]

Example 7. Examples of cosmetic products using erythritol esters of the present invention are shown (expressed in weight %).

[0027]

<Production method> Add glycerin, propylene glycol, and triethanolamine to purified water, and heat and mix at 70° C. to form an aqueous phase. Separately oily ingredients, emulsifiers, fragrances,
Preservatives and antioxidants are heated and mixed at 70°C to form an oil phase. This oil phase is added to the aqueous phase to pre-emulsify,
The mixture was uniformly emulsified using a homomixer and cooled to 30°C after emulsification to obtain an O/W type emollient lotion.

Prescription 2. Emulsified cheek blusher

<Manufacturing method> Pigments and dyes are mixed and ground. Propylene glycol, isoprene glycol, glycerin, and triethanolamine are added to purified water and mixed while heating at 75°C to form an aqueous phase. Mixed and pulverized pigments and pigments are added to this aqueous phase and dispersed. Separately, an oily component, an emulsifier, a preservative, and an antioxidant are heated and mixed at 80°C to form an oil phase. This oil phase is added to the aqueous phase while stirring, and is uniformly emulsified using a homomixer. After emulsification, a fragrance was added at 50°C, and the mixture was further cooled to 30°C with stirring to obtain an emulsified blusher.

[0031]

[Effects of the Invention] It can be seen that the cosmetic of the present invention has a good feel on the skin and spreads well because it contains erythritol ester that feels good on the skin.

Claims (1)

[Claims] [Claim 1] A cosmetic comprising one or more esters of erythritol and a fatty acid having 8 to 22 carbon atoms.