JPH0560442B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a stable cosmetic composition containing a starch fatty acid ester that does not cause oil buildup. [Conventional technology] Conventionally, cosmetics have been formulated with a large amount of oil such as squalane, liquid paraffin, ester oil, silicone oil, etc. in order to provide a feeling of moisture, shine, firmness, etc. ing. [Problems to be solved by the invention] However, as the amount of oil increases, for example, in solid powder cosmetics, the surface becomes hard during use, making it difficult to remove with a sponge (caking). ) phenomenon occurs or oil stains are visible. In addition, oil-based cosmetics (bar-shaped, medium-dish-shaped) tend to soften during use, cause the contents to sag, and become oily, making them unusable or significantly reducing the image of the product. Efforts have been made to improve these problems by adding dehydrated clay minerals such as mica, but the current situation is that sufficient effects have not yet been obtained for oil floats that are still in use. [Means for Solving the Problems] In view of these circumstances, the present inventors have conducted extensive research in order to solve the above-mentioned drawbacks, and as a result, they have added starch fatty acids to cosmetics containing oil and dehydrated clay minerals. When ester is added, even if the amount of oil added is increased to improve usability by giving a soft feel, gloss, and firmness, there will be no oil buildup during use, and the product will remain the same until the end of use. The inventors discovered that it has the property of maintaining the surface condition, and completed the present invention. That is, the present invention provides a cosmetic composition characterized by containing an oil component, a dehydrated clay mineral, and a starch fatty acid ester. Hereinafter, the configuration of the present invention will be explained in detail. The dehydrated clay mineral used in the present invention is obtained by dehydrating clay minerals such as talc, kaolin, mica, and montmorillonite by heating or vacuum deaeration. By these methods, clay minerals from which water of crystallization has been dehydrated can be obtained. When dehydrating by heating, it is preferable to perform the treatment at a temperature of 700°C or higher for 2 hours or more. At the time of dehydration, it is possible to dehydrate the raw ore and then crush it.
It may be dehydrated after being pulverized. One or more kinds of clay minerals that have been dehydrated in this manner are arbitrarily selected and used. The blending amount is 5~
60% by weight is preferred. More preferably 10 to 30
Weight%. The oils used in the present invention are oils and waxes commonly used in cosmetics, such as liquid paraffin, squalane, petrolatum, polyisobutylene, hydrocarbons such as microcrystalline wax, waxes such as carnauba wax and beeswax, and silicone oil. , ester oils such as olive oil, castor oil, and coconut oil fatty acid triglyceride, higher alcohols such as cetanol and stearyl alcohol, and higher fatty acids such as oleic acid and stearic acid. The amount incorporated is generally 2 to 60% by weight. The starch fatty acid ester used in the present invention preferably has a degree of ester group substitution per anhydroglucose unit of starch of 1.0 or more, and the fatty acids added to starch include lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid, and linolenic acid. C12-18 fatty acids such as acids are preferred. The blending amount is preferably 0.1 to 30% by weight. More preferably, it is 1 to 10% by weight. In addition to the above-mentioned essential ingredients, the cosmetic of the present invention contains:
Furthermore, powder is blended as an essential ingredient. Examples of the powder include mica, talc, kaolin, titanium dioxide, iron oxide, magnesium carbonate, zinc oxide, sericite, nylon powder, and polyethylene powder, which are commonly used in cosmetics. The blending amount is generally 1 to 92% by weight. In addition to the above-mentioned essential ingredients, the cosmetic of the present invention contains:
Appropriate amounts of heat insulating agents, surfactants, pigments, fragrances, preservatives, etc. are added as necessary. Of course, these must be used under qualitative and quantitative conditions that do not impair the purpose of the present invention. [Effects of the Invention] The cosmetics of the present invention have a beautiful finish such as moistness, gloss, and firmness when used, are excellent in water resistance, etc., can be used in the same state until the product is used up, and are suitable for caking and other purposes. Oil stains and the like do not occur, which greatly increases the product value. [Example] Next, the present invention will be explained in more detail with reference to Examples. The blending amount is in weight%. In addition, the effect data in the examples were measured and obtained as follows. [Caking] A daily use test was conducted with 20 female panelists and the caking state of the Pact surface was observed. ○: No caking ×: Caking [Oil coating] A daily use test was conducted with 20 female panelists to observe oil coating on the surface. ○: No oil build-up ×: Oil build-up [Usability] A daily use test was conducted with 20 female panelists to give a comprehensive evaluation including spreadability, adhesion to the skin, powderiness, stickiness, finish feel, etc. did. ○: Good ×: Bad

[Table] (Manufacturing method) The powder part is stirred and mixed in a blender, and the oil part (80 to 90°C) containing the preservative dissolved in advance is sprayed with the fragrance, and further stirred. Thereafter, it is crushed and compression molded using a molding machine to obtain a solid foundation.

[Table] (Manufacturing method) Mix and stir the powder part and pulverize. After adding the above-mentioned pulverized powder to oil (80 to 90°C) that has been heated and dissolved in advance, it is dispersed in a homomixer, and after degassing,
An oil-based foundation is obtained by adding fragrance and pouring into a medium dish at 80°C and cooling to room temperature. Example 4 Solid blush Calcined mica 40 Mica 5 Pearl pigment 5 Talc 14.5 Red No. 226 1 Iron oxide yellow 0.5 Starch laurate 15 Squalane 12 Vaseline 5 Sorbitan sesquioleate 2 Fragrance Appropriate amount Same as Example 1 with the above formulation A solid blusher was obtained which had no problem with caking or oily, was moisturized and glossy, and had good usability.

Claims (1)

[Scope of Claims] 1. A cosmetic comprising an oil, a dehydrated clay mineral, and a starch fatty acid ester. 2 The number of carbon atoms in the fatty acid of starch fatty acid ester is
12 to 18. The cosmetic according to claim 1. 3 The blending amount of starch fatty acid ester is 0.1-30
The cosmetic composition according to claim 1, which is % by weight.