JPH0557966B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a novel cosmetic containing a long chain saturated alcohol such as octacosanol. In recent years, octacosanol is said to be an energy source for migratory birds and has attracted attention as a health food. On the other hand, in cosmetics, long-chain alcohols such as cetyl alcohol and stearyl alcohol with carbon numbers of 18 or less have traditionally been used as emulsion stabilizers, brighteners, and emollients in creams and lipsticks. In recent years, it has been pointed out that there are concerns about stimulation and stability, and it has not always been satisfactory. The present inventors focused on long-chain alcohols contained in sunflower wax, wheat germ wax, rice bran wax, Montan wax, bees wax, etc., and as a result of intensive research, we found that these long-chain alcohols do not have the above-mentioned problems. It has been found that it has extremely excellent properties as a component of cosmetics, such as gel-forming ability, gloss stability, and safety. The present invention was completed based on this knowledge. That is, the present invention is a cosmetic composition characterized by containing a linear saturated monohydric alcohol having 24 or more carbon atoms and a melting point of 70 to 80°C, such as octacosanol obtained from the above-mentioned waxes. Saturated monohydric alcohols with a carbon number of 24 or more and a melting point of 70 to 80 are generally sunflower wax, wheat germ wax, rice bran wax, montan wax,
It can be obtained from beeswax etc. Among these, sunflower wax and rice bran wax are obtained as by-products during wintering, which is the refining process of salad oil, and are trace components in the oil and fat components of plant seeds. In particular, higher alcohols obtained from sunflower wax have higher melting points and higher polarity than wax itself, and therefore have many superior properties as cosmetics, such as gel-forming ability, emulsion stability, and gloss. Since the main component of sunflower wax, wheat germ wax, rice bran wax, montan wax, and bees wax is ester, higher linear saturated monohydric alcohols can be obtained by saponification, enzymatic decomposition, etc. Saponification decomposition is carried out in a water-ethanol-xylene system by adding a common alkali such as NaOH or KOH. For enzymatic decomposition, it is possible to use a hydrolase with low selectivity such as reverse. According to the findings of the present inventors, the desired higher alcohol can also be produced by transesterification. That is, this is a method of transesterifying the above-mentioned wax with a lower alcohol such as methanol or ethanol in the presence of a catalyst such as NaOH. These decomposed higher alcohols are washed with water in a system containing a non-polar solvent such as xylene. Further, the non-polar solvent layer is dried and concentrated, filtered with a solvent such as hot xylene or hot ethanol, and the filtrate is cooled and filtered again to obtain the desired higher alcohol in the form of a cake. If recrystallization is repeated further, a higher alcohol with higher purity can be obtained. Furthermore, it can be further concentrated and fractionated by vacuum distillation, molecular distillation, etc. The main component of the higher alcohol obtained in this way is a saturated alcohol having 24 or more carbon atoms, and depending on the raw material, it may contain a large amount of octacosanol.
Melting point is 70~80℃, good oxidation stability, color,
It smells good. These alcohols do not cause skin irritation and are stable in quality and safe when used in cosmetics. In addition, cosmetics with good gel-forming ability, emulsion stability, gloss, and lubricity can be obtained. Therefore, as a substitute for the conventionally used cetyl alcohol and stearyl alcohol, the higher alcohol of the present invention can be used in creams, milky lotions, etc.
When used in basic cosmetics such as lipsticks and blushes, and make-up cosmetics, cosmetics with superior quality compared to conventional products can be obtained. Even a small amount of higher alcohol can produce sufficient effects. Further, even when used in combination with cetyl alcohol or stearyl alcohol, the above characteristics are not lost. Examples of producing higher alcohols of the present invention and examples of the present invention are shown below. Production example 1 400g of sunflower wax and 3 ethanol
Add 1.6 g of NaOH and stir under reflux for 4 to 6 hours.
3 of hot xylene and 6 of warm water are added to the reaction solution and stirred. After removing the aqueous layer, add 6 more warm water and wash 2 times.
Do it twice. The xylene layer is cooled to 10°C and filtered.
Recrystallize the cake in 500 ml of xylene to obtain about 100 g of white powder. The properties of this white powder are as follows. Melting point: 70-72% Alcohol content: 92.3 (alcohol content with 24 or more carbon atoms: 69.1) Alcohol composition: According to gas chromatography

[Table] Production example 2 100g of de-resinated Montan wax and 500ml of xylene
Dissolve in water, add 300ml of 2N-ethanol potassium, and add approx.
Saponification decomposes at 80℃. After washing the reaction solution with water until it is free of alkali, the xylene layer is cooled to 10% and then filtered. Recrystallize the cake in 20 ml of xylene to obtain about 4 g of white powder. The properties of this white powder are as follows. Melting point: 76-79% Alcohol content: 68.4 (68.1% alcohol content with 24 or more carbon atoms) Alcohol composition: According to gas chromatography

[Table] Production example 3 Add 100 g of rice bran wax to water 2 to which 5% lipase OF (manufactured by Meito Sangyo) has been added, and stir at 50°C for 10 hours. Add 400 ml of hexane to this, stir and leave to stand, then remove the aqueous layer. After further washing with 1 portion of water twice, the hexane layer is cooled to 10 ml of water and filtered. Recrystallize the cake with 30 ml of ethanol to obtain about 3 g of white powder. The properties of this white powder are as follows. Melting point: 71-74℃ Alcohol content: 89.1% (80.5% alcohol content with 24 or more carbon atoms) Alcohol composition: Based on gas chromatography

[Table] Example 1 Emollient cream production example 1 Higher alcohol 3.0% by weight Bees wax 5.0 Lanolin 8.0 Squalane 37.5 Glycerol monostearate polyoxyethylene (20E.O.) 4.0 Sorbitan monolaurate 2.0 Propylene glycol 5.0 〃 Purified water 35.5 〃 Flavors, preservatives, antioxidants Appropriate amount 〃 Add propylene glycol to purified water and heat it to 70℃. Separately, mix the remaining ingredients as the oil phase and heat this to 70℃. This oil phase is added to the aqueous phase and stirred, uniformly emulsified using a homogenizer, and then cooled. The obtained emollient cream spread well on the skin, had an excellent feeling of use, and gave the skin flexibility and smoothness. Example 2 High alcohol of lipstick production example 2 25.0% by weight Castor oil 45.3 Lanolin 4.0 Beeswax 5.0 Ozokerite 4.0 Chianderilla wax 7.0 Carnauba wax 2.0 Color Material 7.7 Antioxidant, preservative, fragrance Appropriate amount Heating the base material Melt and mix evenly. Colorants are added to the mixture, kneaded with a roll mill, and dispersed uniformly.Then, the mixture is melted again to defoam the fragrance, and then poured into molds.
Cool rapidly and harden. Remove from the mold, adjust the appearance of the stakes, and then frame to make the surface even. The resulting lipstick does not fold or bend under normal use, and does not exhibit blooming over time. It also has excellent adhesion and adhesion, is glossy, and has excellent hardness, stickiness, and spreadability. Comparative Example 1 Lipstick A lipstick is prepared in the same manner as in Example 2, except that the higher alcohol in Production Example 2 is replaced with 2-octyldodecanol (Eitanol G, manufactured by Henkel). The resulting lipstick is soft and bends under normal use, causing blooming. In addition, it is inferior in quality such as gloss, hardness, and lubricity.

Claims (1)

[Claims] 1. Wax having a carbon number of 24 or more obtained by decomposing wax,
A cosmetic comprising a higher linear saturated monohydric alcohol having a melting point of 70 to 80°C. 2. The cosmetic according to claim 1, wherein the wax is sunflower wax. 3. The cosmetic according to claim 1, wherein the higher straight chain saturated monohydric alcohol having 24 or more carbon atoms and a melting point of 70 to 80°C is mainly composed of octacosanol.