JPS6143325B2 - - 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. Since conventional oil-based makeup cosmetics are mainly made of mineral oil or ester oil, they feel greasy when applied to the skin, regardless of the form (stick or cream). In addition, depending on the application area, makeup fading becomes noticeable over time, and the original purpose of makeup makeup, the finish, is impaired, and many consumers complain. The present inventors have focused on volatile oils and have been searching for them to have the characteristics of oil-based makeup cosmetics and avoid the above-mentioned drawbacks. As a result, it was possible to obtain a makeup cosmetic that achieved the intended purpose by using volatile oil components as shown below. (1) Low boiling point hydrocarbons (2) Low degree of polymerization dimethylpolysiloxane (3) Low degree of polymerization cyclic dimethylpolysiloxane (4) Organosilicon compounds having a silicon-carbon bond represented by the general formula () Among these, ( 1), (2), and (3) are currently used in makeup cosmetics, but considering the requirements of being tasteless, odorless, and harmless as cosmetic raw materials, (1), (2) (3) has a unique odor, and (3) has an excellent odor, but there are restrictions on formulation composition in terms of compatibility with other cosmetic raw materials. The present inventors succeeded in obtaining a cosmetic that satisfies various conditions by blending an organosilicon compound represented by the general formula () having a silicon-carbon bond. Table 1 shows the chemical constants of this raw material.

[Table] Naturally, it does not depart from the spirit of the present invention to introduce a compound containing a mixture of methyl groups and ethyl groups, or the introduction of an alkyl group to the hydrogen of the -CH ₂ - group, but any combination Even if used, the boiling point is preferably 300°C or less at normal pressure. Next, the compatibility with various cosmetic raw materials is shown in the table.

[Table] Also, the volatilization rate roughly corresponds to the boiling point,
Measured by paper method. The volatilization rate can be arbitrarily adjusted by adjusting the number of alkyl chains or methylenes. Figure 1 shows the temperature of a sample dropped 0.5cc onto paper.
This is a plot of weight loss over time under conditions of 25°C and 50% humidity. The numbers in Figure 1 are 1: Alcohol 2: Hexamethyldisilylethylene 3: Hexamethyldisilylbutylene 4: Hexamethyldisilylpentylene 5: Hexaethyldisilylethylene Synthesis method of silicon compound represented by formula () teeth,
Journal of the Organic Chemistry No.
Volume 18, pages 1739-1742, published in 1953,
Using Li, halogenated ethylene and trialkylosilane are added at low temperature, stirred, and isolated by distillation. Next, examples of cosmetics using these will be shown. Example 1 Foundation (parts by weight) Hexaethyldisilylethylene 50 Carnauba wax 1.5 Ceresin B 5 Sorbitan monooleate 1.5 Mica 20 Kaolin 10 Titanium oxide 10 Iron oxide Red, yellow, black 2 Fragrance Appropriate amount Obtained powder The foundation spreads smoothly when applied, and the hexaethyldisilylethylene evaporates in a few minutes. Afterwards, 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 (parts by weight) Hexamethyldisilylethylene 52 Carnauba wax 4 Microcrystalline wax 10 Sorbitano monostearate 1 Cellulose derivative 4 Purified water 6 Talc 13 Iron oxide black 10 Fragrance Appropriate amount The result is a mascara that has no drawbacks of conventional oil-based mascaras such as coloring, has good makeup retention over time, and has excellent water resistance. Example 3 Eyeliner (parts by weight) Hexamethyldisilylethylene 50 Beeswax 7 Carnauba wax 2 Cellulose derivative 5 Higher alcohol 5 Organically modified bentonite 3 Aluminum stearate 3 Alcohol 5 Talc 8 Iron oxide black 12 Fragrance Appropriate amount of Example 2 As with mascara, after volatilizing the hexamethyldisilylethylene, an eyeliner with excellent water resistance and oil resistance was obtained. Example 4 Eye shadow (parts by weight) Hexamethyldisilylbutylene 40 Carnauba wax 2 Microcrystalline wax 5 Sorbitan monooleate 1 Ester oil 5 Aluminum stearate 2 Higher alcohol 5 Mica 12 Carion 10 Titanium oxide 5 Ultramarine 10 Iron oxide yellow 2 Iron oxide black 1 Fragrance Appropriate amount A water-resistant eye shadow that spreads smoothly when applied, and the residue after volatilization does not easily ruin your makeup. Example 5 Cheek blush (parts by weight) Hexamethyldisilylbutylene 65 Carnauba wax 1 Microcrystalline wax 5 Sorbitan sesquiolate 1 Organically modified bentonite 3 Ethanol 5 Mica 10 Herringdon pink 5 Iron oxide red 3 Iron oxide yellow 2 Fragrance Appropriate amount The resulting blusher spreads smoothly when applied, and the residue after volatilization does not easily disturb the makeup. Furthermore, since the series of compounds have good compatibility with known low-boiling hydrocarbon cyclic/chain dimethylpolysiloxanes, it does not depart from the spirit of the present invention to use them in combination.

[Brief explanation of the drawing]

Figure 1 shows a droplet used in the present invention on paper.
It is a graph showing the weight change due to volatilization of R ₃ Si(CH ₂ )nSiR ₃ (n=2 to 5).

Claims (1)

[Scope of Claims] 1. A cosmetic comprising one or more organic silicon compounds represented by the general formula (). R ₃ Si(CH ₂ )nSiR ₃ () (However, in the formula, each R independently represents a methyl group or an ethyl group, and n represents an integer from 2 to 5.)