JPS6410484B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a cosmetic that solves the sticky feel caused by water-soluble polyhydric alcohol by incorporating polyoxyalkylene alkyl glycoside ether and lecithin. [Prior Art] Retention of moisture in the skin is an essential factor for keeping the skin healthy, and many cosmetics and pharmaceuticals aimed at moisturizing are commercially available. Research into substances involved in moisturizing has been actively conducted, and a number of moisturizing agents have been provided. In particular, water-soluble polyhydric alcohols are widely used in cosmetics, pharmaceuticals, etc. because of their excellent water retention and hygroscopic properties. [Problems to be Solved by the Invention] However, although these water-soluble polyhydric alcohols have an excellent effect of keeping the skin healthy and normalizing rough skin, they feel quite sticky when used, so they are particularly difficult to use. This has been a major problem in cosmetics, which are desired to have a good texture. In view of these circumstances, the present inventors have conducted intensive research to obtain cosmetics with excellent moisturizing effects that feel great when used, and as a result, have incorporated polyoxyalkylene alkyl glycoside ether into cosmetics containing water-soluble polyhydric alcohols. He discovered that the stickiness could be suppressed by applying this method, and filed a patent application (patent application filed in 1983).
−6823). However, the effect of suppressing stickiness is not necessarily sufficient even with this, and as a result of further studies, the present inventors have found that by adding lecithin in addition to the above composition, stickiness can be almost completely suppressed. They discovered this and completed the present invention. [Means for Solving the Problems] That is, the present inventor has developed a solution that contains 5 to 40% by weight of a water-soluble polyhydric alcohol having two or more hydroxyl groups in the molecule.
The cosmetic containing the above composition is characterized by containing polyoxyalkylene alkyl glucoside ether and lecithin, and has an excellent moisturizing effect and is easy to use. Such cosmetics include creams, milky lotions, lotions, and other forms of cosmetics. The water-soluble polyhydric alcohol used in the present invention has two or more hydroxyl groups in its molecule, and those containing two hydroxyl groups include polypropylene glycols such as propylene glycol, dipropylene glycol, and tripropylene glycol;
Butylene glycol, 1,4 butylene glycol, etc., and those containing three or more hydroxyl groups in the molecule, such as glycerin, diglycerin, triglycerin,
Examples include polyglycerin such as tetraglycerin, maltose, maltitol, sucrose, fructose, xylitol, sorbitol, maltotriose, threitol, erythritol, starch-degrading sugar-reducing alcohol, and one or two of these. More than one species is used. The present invention shows more remarkable effects in cosmetics containing polyhydric alcohols having three or more hydroxyl groups in the molecule. The amount of water-soluble polyhydric alcohol blended is 5 to 40% by weight based on the total amount of the cosmetic, and the effects of the present invention are particularly remarkable in cosmetics containing 10 to 30% by weight. 5
If the amount is less than 40% by weight, a sufficient moisturizing effect cannot be obtained, and if the amount exceeds 40% by weight, stickiness cannot be sufficiently suppressed. The polyoxyalkylene alkyl glycoside ether used in the present invention is obtained, for example, by synthesizing an alkyl glycoside using glucose as a starting material and then adding ethylene oxide and/or propylene oxide, and this polyoxyalkylene alkyl glycoside ether itself also has moisture retention properties. has. Ethylene oxide and/or polyoxyalkylene alkyl glycoside ether used in the present invention
Alternatively, the average number of moles of propylene oxide added is preferably about 5 to 40 moles in total. Further, the alkyl group in the molecule includes methyl group, ethyl group, propyl group, etc., but methyl group is preferable. The amount of polyoxyalkylene alkyl glycoside ether to be blended is effective at a weight ratio of 1/10 or more to the amount of water-soluble polyhydric alcohol having two or more hydroxyl groups in the molecule. If it is less than 1/10, there will be no effect or only a small amount if there is. The lecithin used in the present invention includes not only lecithin extracted from egg yolks and plants, but also lecithin or hydrogenated products obtained by further purifying this lecithin. In the present invention, one or more of the above lecithins are appropriately selected and used. The blending amount of lecithin is 0.05 to 5% by weight,
If it is less than 0.05%, the effect will not be sufficiently exhibited, and if it exceeds 5%, it will be unfavorable in terms of odor. In addition to the above-mentioned essential ingredients, the cosmetic of the present invention includes:
Other ingredients commonly used in cosmetics, such as oily ingredients, surfactants, ultraviolet absorbers, lower alcohols, preservatives, bactericidal colorants, powders, fragrances, drugs, water-soluble polymers, and buffering agents, can be combined with the effects of the present invention. They can be blended as appropriate within a range that does not impair the properties. Further, the present invention can be used in any manner, and can be widely applied to basic cosmetics such as lotions, creams, and milky lotions, as well as makeup cosmetics such as foundations, and hair cosmetics such as hair treatments. [Effects of the Invention] The cosmetic of the present invention contains a water-soluble polyhydric alcohol having two or more hydroxyl groups in its molecule, and although it has an excellent moisturizing effect, it does not have the stickiness characteristic of water-soluble polyhydric alcohols. It is suppressed and has improved usability such as flexibility and conformability. It is also an excellent cosmetic with good stability and safety. [Example] The present invention will be described in detail below with reference to Examples and Comparative Examples. The present invention is not limited to these. The blending amount is in weight%. Nutritional creams of Example 1 and Comparative Examples 1 to 3 shown in Table 1 were prepared and evaluated for usability. The evaluation method is as follows. (Evaluation method) Forty cosmetic usability evaluation monitors used the cosmetics of Examples and Comparative Examples and evaluated the stickiness on a scale of 10. 10: Not sticky at all 〓 1: Extremely sticky.

【table】

[Table] (Production method) After heating the oil phase of (A) and the water phase of (B) to 70℃ and completely dissolving them, mix the oil phase with the water phase and emulsify using an emulsifier. do. The emulsion was cooled to a final temperature of 30°C using a heat exchanger to obtain cream. From the results in Table 1, it is clear that the combination of POE(10) methyl glucoside ether and hydrogenated lecithin significantly suppresses stickiness compared to when each is combined alone. Example 2 Cleansing cream (A) Sethanol 2.0 Beasetanol 1.0 solid paruffin 1.0 stearic acid 2.0 Waseline 10.0 Waseline 10.0 flow paraphnes 35.0 PoE (20) Sorbitan steal 2.4 Glycarylic monster rate 2.6 Propil paraben 0.3 Soybean lecithine 5.3 (b) 1 ,, 3-butylene glycol 5.0 Maltitol 5.0 POE methyl glucoside ether (EO20 mol) 1.0 Purified water 27.2 Potassium hydroxide 0.08 (Production method) According to Example 1. Example 3 Nutrient emulsion (A) Beeswax 1.0 Vaseline 2.0 Deodorized lanolin 1.5 Jojoba oil 6.0 Cetyl isooctanoate 4.0 POE (60) hydrogenated castor oil 2.0 Refined lecithin 1.0 Ethylparben 0.2 Butylparaben 0.1 Fragrance 0.3 (B) Dipropylene glycol 5.0 Sorbitol 10.0 POE (15) Methyl glucoside ether 4.0 Carboxyvinyl polymer 0.2 Purified water 62.5 Potassium hydroxide 0.1 (Production method) According to Example 1. Examples 4 Huan Da Syon (A) Cetanole 3.5 stearic acid 2.0 -deodoral Lanolin 5.0 Squaralan 8.0 Glyceryl Monoisosteare Rate 2.5 PoE (10) Behenyl Ether 0.5 Egg Lecitin 2.0 ethyl Paraben 0.2 Butyl Paraven 0.2 (B) Jigrylicin 3.0 kicilitaris 3.0 Rail 5.0 POP ( 5) POE(5) Methyl glucoside ether 2.0 Mixed powder 15.0 Purified water 50.85 Potassium hydroxide 0.25 (Production method) Same as Example 1. Example 5 Soft lotion (A) Purified water 69.8 Glycerin 2.0 POE(10) Methyl glucoside ether 10.0 1,3-butylene glycol 10.0 (B) Ethanol 7.0 POE(60) Hydrogenated castor oil 1.0 Fragrance 0.05 Methyl paraben 0.1 Purified lecithin 0.05 ( Manufacturing method) After uniformly dissolving the aqueous phase part of A and the alcohol phase part of B at room temperature, B was added to A and mixed uniformly to obtain a lotion. Example 6 Hair treatment (A) Purified water 64.3 Glycerin 10.0 1,3-butylene glycol 5.0 POE (20) Methyl glucoside ether 5.0 Stearyl trimethyl ammonium chloride 4.0 (B) Cetostearyl alcohol 5.0 Glyceryl monostearate 1.0 Soy lecithin 0.3 Flavor 0.2 Methylparaben 0.2 Cetyl isooctanoate 5.0 (Production method) According to Example 1. Example 7 Aqueous essence (A) Purified water 53.4 Glycerin 20.0 1,3-butylene glycol 10.0 POE (20) Methyl glucoside ether 5.0 Dipropylene glycol 5.0 Carboxy vinyl polymer 0.2 (B) Ethanol 5.0 POE (60) Hydrogenated castor oil 1.0 Egg yolk lecithin 0.1 Fragrance 0.1 Methylparaben 0.2 (C) Potassium hydroxide 0.1 (Production method) After uniformly dissolving the aqueous phase of A and the alcohol phase of B at room temperature, add B to A and mix uniformly.
Solubilize. Then, potassium hydroxide (C) was added to obtain an aqueous essence. Comparative Example 4 Nutrient Emulsion POE (15) methyl glucoside ether was removed from Example 3, and the total amount was made up to 100% with purified water. Comparative Example 5 Soft lotion POE (10) methyl glucoside ether and purified lecithin were removed from Example 5, and the total amount was made up to 100% with purified water.
shall be. Comparative Example 6 Aqueous Essence Egg yolk lecithin was removed from Example 7, and the total amount was made up to 100% with purified water. Table 2 shows the stickiness evaluation results of Comparative Examples 4 to 6 and Examples 2 to 7. The evaluation method is the same as above.

【table】

Claims (1)

[Claims] 1. A cosmetic containing 5 to 40% by weight of a water-soluble polyhydric alcohol having two or more hydroxyl groups in the molecule, characterized by containing polyoxyalkylene alkyl glucoside ether and lecithin.