JPS6143326B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to cosmetics, particularly makeup cosmetics, containing organic silicon compounds having silicon-carbon bonds. General oil-based makeup cosmetics, whether in stick or cream form, spread smoothly and have a beautiful finish when applied to the skin, but they tend to be oily or oily.
It has many drawbacks, such as being sticky and causing makeup to fade over time. The present inventors have focused on and have been searching for volatile oil components that have the characteristics of oil-based makeup cosmetics and avoid the drawbacks. Cosmetics containing volatile oils have the characteristics of oil-based makeup cosmetics, such as smoothness, spreadability, and ease of blurring when applied, and also have a refreshing feel without the stickiness characteristic of oils. It has many advantages, such as the fact that the makeup does not fade over time. By the way, volatile substances that satisfy the requirements of being tasteless, odorless, and harmless as cosmetic ingredients are extremely limited, and only low-boiling-point hydrocarbons and cyclic/chain dimethylpolysiloxanes with a low degree of polymerization are known. It is used as a thing. However, low-boiling hydrocarbons have a characteristic odor as a raw material, and cyclic/chain dimethylpolysiloxanes have restrictions on formulation composition in terms of compatibility with other components. The present inventors have obtained a cosmetic having excellent properties that overcome the above-mentioned drawbacks by blending an organic silicon compound having a silicon-carbon bond. That is, the present invention is a cosmetic material containing one or more organic silicon compounds represented by the following general formula (). (However, in the formula, R each independently represents a methyl group or an ethyl group, and n represents an integer of 0 or 1.) The boiling points of the organosilicon compounds used here are as shown in the table. It is also conceivable that R in the above-mentioned general formula () may have a larger number of carbon atoms, such as a propyl group or a butyl group, but in this case, the boiling point would increase significantly and depart from the gist of the present invention.

[Table] The table also shows a comparison of the solubility of the silicon compound used in the present invention and other silicon compounds in various cosmetic raw materials. In the table, A, B, and C represent hexamethylsiloxane, cyclopentadimethylsiloxane, and hexamethyldisilylmethylene, respectively.

[Synthesis example 1]

Add 238 g of hexachlorodisilyl methylene to 200 g of ethyl ether, add 6 moles of methylmagnesium bromide, and react under hydrochloric acid acidity at 80°C for 3 hours to obtain 145 g of hexamethyldisilyl methylene. [Synthesis Example 2] Add 0.5 mol of trimethylsilylmethyllithium and 0.155 mol of dimethyldichlorosilane to 500 ml of pentane, reflux for 12 hours, and then continue heating at 90°C for 12 hours to produce octamethyltrisilylmethylene with a yield of 86%. get. Next, examples of the present invention will be shown. [Example 1] Foundation (formulation) Hexaethyldisilylmethylene 40 (parts by weight) Carnauba wax 1 Microcrystalline wax 6 Organically modified montmorillonite 2 (parts by weight) Sorbitan monooleate 1 Mica 20 Talc 10 Titanium oxide 15 Iron oxide 5 Fragrance Appropriate amount When applying the obtained foundation,
It spreads smoothly and the hexaethyldisilylmethylene evaporates in a few minutes. After that, it feels refreshing and adheres closely to the skin, making it difficult for makeup to come off, and it is also water resistant so it won't come off even when bathing in the sea. [Example 2] Mascara (formulation) Hexamethyldisilylmethylene 52 (parts by weight) Carnauba wax 5 Candelilla wax 3 Microcrystalline wax 9 Cholesterol 1 Sorbitan monostearate 1 Dialkylditallow ammonium cellulose derivative 3 Aluminum star Rate 1 Purified water 5 Talc 8 Black iron oxide 12 Fragrance Appropriate amount A mascara that has no drawbacks of conventional oil-based mascaras, such as coloring the lower eyelids when blinking, has good makeup retention over time, and has excellent water resistance. . [Example 3] Eyeliner (formulation) Hexamethyldisilylmethylene 50 (parts by weight) Beeswax 5 Carnauba wax 3 Terpene resin 10 Organically modified bentonite 2 Cellulose derivative 5 Iron oxide black 10 Talc 5 Purified water 10 Fragrance Appropriate amount Implementation As with the mascara of Example 2, after hexamethyldisilylmethylene was volatilized, an eyeliner with excellent water resistance and oil resistance was obtained. [Example 4] Eye shadow formulation) Octamethyltrisilylmethylene 40 (parts by weight) Organically modified bentonite 3 Aluminum stearate 2 Sorbitan sesquiolate 1 Liquid paraffin 5 Carnauba wax 1 Ceresin B 2 Microcrystalline wax 3 Mica 20 Talc 10 Ultramarine 10 Iron oxide red 3 Fragrance Appropriate amount A water-resistant eye shadow that spreads smoothly when applied, and the residue after volatilization does not easily ruin your makeup. In addition, the series of organosilicon compounds used in the present invention have good compatibility with known low-boiling hydrocarbons, cyclic or chain dimethylpolysiloxane, tetraalkylsilane, hexaalkyldisilylalkylene, etc., so they can be used in combination. Such implementation does not depart from the spirit of the invention.

Claims (1)

[Scope of Claims] 1. A cosmetic comprising one or more organic silicon compounds represented by the general formula (). (However, in the formula, R each independently represents a mel group or an ethyl group, and n represents an integer of 0 or 1.)