JPS6020362B2 - cosmetics - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to cosmetics containing a novel base, and is suitable for basic cosmetics, makeup cosmetics, and hair products that are light to the touch and have excellent storage stability. Its purpose is to provide cosmetics, body cosmetics, etc.

As is well known, wax is used as a base not only for basic cosmetics but also for makeup products, etc., and its role is important, but the waxes conventionally used are not always satisfactory. .

In other words, among the existing waxes, there is no wax that has the same melting point as the human body's sebum. Therefore, it is necessary to use a mixture of a low melting point oil base and a high melting point wax. In addition, conventional waxes have crystallinity and have a melting point that is significantly different from the human body temperature, which causes phenomena such as separation, crystallization, abrasion, and sweating during storage, which significantly reduces the value of the product. . In this case, it is possible to stabilize the product to some extent by using an admixture, but this is not a fundamental solution. In addition, commonly used waxes are mainly composed of very high-grade fatty acids or alcohol esters, so they have the disadvantage of being very heavy to the touch and difficult to suit the diversifying tastes of users. . Lanolin is one of the few waxes that does not have the above disadvantages and has properties similar to human sebum, but as it is a natural product, the supply and price are unstable, and its complex composition causes no problems. It has the disadvantage that it can cause a definite lanolin allergy.

The present inventors have developed a wax that has properties and behavior similar to human surface lipids on the skin surface, that is, a semisolid wax that melts at human body temperature, does not have crystallinity, and does not interfere with skin breathing. As a result of extensive research into the production method, we discovered a synthetic triglyceride consisting of a higher linear saturated fatty acid and a higher side chain saturated fatty acid as a semi-solid wax that satisfies all of the above conditions.

That is, the present invention relates to a cosmetic composition containing the above-mentioned synthetic triglyceride. A higher linear saturated fatty acid refers to a fatty acid represented by the general formula RCOOH in which the alkyl group R is linear and saturated, and a higher side chain saturated fatty acid refers to a fatty acid in which the alkyl group R is linear and saturated. In the present invention, it is suitable that the number of carbon atoms in the alkyl group is 14 or more in higher straight mirror saturated fatty acids, and 8 or more in higher side chain saturated fatty acids. It is.

Further, two or more types of fatty acids having different numbers of carbon atoms may be used as a mixture. The ratio of higher linear saturated fatty acids and higher side chain saturated fatty acids needs to be determined appropriately depending on the number of carbon atoms in both fatty acids. % or more is necessary to obtain a semi-solid wax for cosmetics.

The synthetic triglyceride according to the present invention is obtained by esterifying higher linear saturated fatty acids and higher side chain saturated fatty acids glycerin by a known method.

For esterification, for example, a method using an acid halide, an ester group exchange method, an esterification reaction without a catalyst or in the presence of a catalyst, under normal pressure or reduced pressure, etc. can be adopted. After the esterification reaction is completed, the reaction mixture is deoxidized with an alkali according to a conventional method.
All products that have been decolorized using a decolorizing agent and deodorized and purified using steam distillation are cool-colored, odorless, non-irritating to the skin, and non-crystalline with an excellent feel to the skin, with a melting point of 30-50. It is a semi-solid wax with excellent properties as a base for cosmetics.

By replacing all or part of the mixture of high melting point wax and liquid oil base conventionally used in this base, the problems caused by the crystallinity of high melting point waxes can be easily solved. . In addition, the semi-solid ester of the present invention has the property of melting at approximately the same temperature as human body temperature, so cosmetics containing the semi-solid ester have an excellent feel on the skin and can be used in place of petrolatum, lanolin, etc. can do. Next, an example of synthesis of the semi-solid wax according to the present invention will be shown.

Synthesis Example 1 1.2 moles of 2-ethylhexanoic acid triglyceride, 2.8 moles of stearic acid triglyceride, and sodium methylate were all charged into a four-necked flask equipped with a simulator, a thermometer, a nitrogen gas blowing tube, and a reflux device. 0.3% to the amount
Then, the mixture was heated at 90°C for 30 minutes.

After completion of the reaction, the product was washed with water and dried using a conventional method, and deodorized under reduced pressure by blowing steam into the product to obtain semi-solid wax (1). Yield unevenness %, acid value 0.01, hydroxyl value 0.7, melting point 3
There were 5 to 44 o. Synthesis Example 2 1.4 mol of isostearic acid, 1.0 mol of palmitic acid, 0.6 mol of stearic acid, and 1.0 mol of glycerin were placed in a four-necked flask equipped with a coagulator, a thermometer, a nitrogen gas blowing tube, and a water separator. Add 0 mol, xylol and para-toluene sulfonic acid at 5% and 0.2%, respectively, based on the total amount charged, and make 150 to 260 oo
The reaction was carried out until the calculated amount of water accumulated in the water separator.

The time required was approximately 6 hours. After the reaction is completed, deoxidize using a conventional method, and decolorize using an activated clay-activated carbon decolorizer.
Deodorization was carried out under reduced pressure by blowing in water vapor to obtain a colorless and odorless semi-solid wax (n). Yield 80%, acid value 0.02,
The hydroxyl value was 0.8 and the melting point was 38-4.0. Synthesis example
3 As in Synthesis Example 2, myristic acid monoglyceride 1.
0 mol, stearic acid 0.5 mol, isostearic acid 1
．． 150 ~ 5 mol using xylol and zinc acetate
It reacted for about 7 hours at 26 pm.

After the reaction was completed, deoxidation, decolorization and deodorization were carried out according to conventional methods to obtain a colorless and odorless semi-solid wax (m). Yield 8
3%, acid value 0.00, hydroxyl value 1.2, melting point 36-40℃
Met. Next, examples of the present invention will be shown.

Example 1 Lipstick 1 Semi-solid wax (1) according to Synthesis Example 1. 55 parts by weight Lanolin wax 10 Microcrystalline wax 10 Glycerin tricaprylate 15 2 Lake
10 〃Dye solution Appropriate amount Fragrance Appropriate amount Add and mix each of the ingredients in '1' above, and heat to 95-100℃.
After heating and mixing, add and mix the ingredients (1), and then mold using a lipstick molder.

Example 2 Cream 1 Semi-solid wax according to Synthesis Example 2 (0) 25 parts by weight Lanolin 5 Squalene 5 Peace wax 5 2 Solpitan mozostearate 3 Polyoxyethylene sorbitan monolaurate 2 Ion exchange water
55 〃3 Flavorings
Appropriate amount of preservative Appropriate amount It is produced by heating each of the components in {1-] above to 60 to 80q0, mixing them in a pseudo-pour mixture, adding the component in {2) thereto, and then adding and mixing the component in '3}.

Claims (1)

[Claims] 1. It is characterized by blending one or more products obtained by esterifying a higher fatty acid containing at least 30% or more of a higher linear saturated fatty acid and a higher side chain saturated fatty acid with glycerin. Cosmetics.