JPS60181011A - Sticklike antiperspirant cosmetic - Google Patents

Abstract

PURPOSE:The titled cosmetic, obtained by incorporating a wax with a volatile oily organic compound, inorganic powder and powdery antiperspirant active constituent, and having improved stability, feeling of use and antiperspirant efficacy. CONSTITUTION:A sticklike antiperspirant cosmetic obtained by incorporating (A) 8-25wt% mixture of a wax having 50-110 deg.C melting point, preferably low- melting wax having 50-70 deg.C melting point with high-melting wax having 70- 110 deg.C melting point at 7/3-5/5 weight ratio with (B) 30-70wt% volatile oily organic compound having <=10cSt viscosity at 25 deg.C, e.g. dimethylpolysiloxane, (C) 3-20wt% inorganic powder having 31-40wt% oil absorption, e.g. talc, and (D) 5-30wt% powdery antiperspirant active constituent, preferably an astringent aluminum compound or zirconium compound. The preferred amounts of the respective components to be incorporated are as follows; 10-20wt% component (A) 40-60wt% component (B), 5-15wt% component (C) and 10-30wt% component (D).

Description

[Detailed description of the invention] The present invention relates to a stick-like antiperspirant cosmetic.

BACKGROUND ART Conventionally, stick-type antiperspirant cosmetics have been used along with spray-type antiperspirant cosmetics to suppress sweating and prevent body odor. Many of the conventional snack-like antiperspirant cosmetics are soap gels containing soap, such as sodium stearate, and alcohol as a base, in which a bactericidal agent is blended (for example, as described in Japanese Patent Publication No. 86631/1983). However, since such snack-like antiperspirant cosmetics need to be prevented from drying out, a complicated storage container must be used, and special manufacturing equipment such as a closed pot is required for manufacturing.

Furthermore, this type of composition cannot contain active ingredients with excellent antiperspirant activity, such as aluminum salts, and therefore has the disadvantage of poor antiperspirant effect.

In addition, other snack-like antiperspirant cosmetics include water-insoluble waxes such as beeswax, spermaceti, and carnauba wax, liquid organic compounds such as inglovir myristate, and fine powders with antiperspirant activity such as aluminum astringents. An antiperspirant consisting of a compound has been proposed (Japanese Patent Application Laid-open No. 35348/1983). Further, a) a saturated aqueous solution of an astringent, b) a volatile liquid having a boiling point of less than 250°C selected from methylsiloxane and /J silaffin hydrocarbon, c) a solid alkanoic acid, and d) a polydiorganosiloxane ash. an oxyalkylene copolymer; e)
An antiperspirant agent consisting of waxy esters has been proposed (Japanese Patent Publication No. 57-28682). However, since these are mainly composed of a water-insoluble wax and a liquid organic compound, they are extremely sticky and have the disadvantage of causing discomfort during use.

The present invention has been made under the above circumstances, and its purpose is to overcome the above-mentioned drawbacks and provide a stick-type antiperspirant cosmetic that is excellent in stability, usability, and antiperspirant efficacy.

That is, this invention includes (a) 8 to 25% by weight of waxes having a melting point of 50°C to 110°C; (b)
30 to 70% by weight of a volatile oily organic compound having a viscosity of 10 centistokes or less at 25°C;
c) 3 to 20 inorganic powder with oil absorption of 31 to 40 inches
weight%, and 5 to 30% of powdered antiperspirant active ingredient.
To provide a stick antiperspirant cosmetic containing % by weight.

The first essential ingredient of the cosmetic of this invention is 50°C to 10°C.
It is a wax having a melting point of 0°C. Examples of such waxes include beeswax, carnauba wax, candelilla wax, osichelite, ceresin, rice wax, rough-in wax, microcrystalline wax, stearyl alcohol, hydrogenated castor oil, Fischer-Trogsi wax, etc. Examples include synthetic wax. These can be used alone or in combination of two or more. When using two or more types, a low melting point wax with a melting point of about 50°C to 70°C and a high melting point wax with a melting point of about 70°C to 110°C are used.
It is more preferable to use the weight ratio of /3 to 515. In that case, particularly excellent non-stickiness and "spreadability" during use can be obtained.

The content of waxes is 8 to 25% by weight, preferably 10 to 20% by weight. If the amount is less than this range, the cosmetic may melt at high temperatures or become sticky when used.
"growth" is impaired.

The second essential component of the cosmetic of this invention is 1 at 25°C.
It is a volatile oily organic compound with a viscosity of less than 0 centistokes. Specific examples of such compounds include decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, dimethylpolysiloxane, and /4' rough-type hydrocarbons with viscosities of 10 centistokes or less at 25°C. I can list sexual substances.

The blending amount of this oily organic compound is 30 to 70% by weight,
Preferably it is 40 to 60% by weight. If the blending amount is less than this range, the "spreadability" during use will be impaired, and even if the amount exceeds this range, there will be an inconvenience that the product will become sticky during use.

The third essential component of the cosmetic of this invention is an inorganic powder with an oil absorption of 31 to 40 inches. The oil absorption amount referred to herein is measured as follows. That is, samples 1 to
Place 5 g of the sample on a glass plate (250 x 250 x 5 m), drop boiled linseed oil little by little into the center of the sample from a billet, and knead the entire sample thoroughly with a steel spatula each time. The dropping and kneading operations are repeated, and the end point is when the entire mixture becomes one hard, tapered ball that can be rolled up into a spiral shape with a steel spatula. Measure the amount of boiled linseed oil used and calculate the oil absorption (a) G using the following formula.

A preferred inorganic powder is talc. Talc with an oil absorption of 45 inches or more, which is usually used in this field, does not spread easily on the skin and cannot be used. Talc with an oil absorption of less than 30 inches may become too sticky or at high temperatures. Inconveniences such as poor stability occur.

The amount of inorganic powder blended is 3 to 20% by weight, preferably 5% by weight.
and 15% by weight. If the amount is less than this range, there will be an inconvenience of stickiness during use, and if it is more than this range, the "spreadability" during use will be impaired.

The fourth essential ingredient of this invention is a powdered antiperspirant active ingredient. Preferred antiperspirant ingredients are astringent aluminum compounds and astringent zirconium compounds. These are usually in salt form.

Preferred specific examples include aluminum chlorohydroxide, aluminum human mixibromide, aluminum chloride, aluminum/zirconium/glycine complex (
US Pat. No. 3,792,068), and mixtures of aluminum chloride with other less acidic aluminum salts, such as aluminum hydroxycyclolide or aluminum chlorohydroxide (Canadian Patent No. 958,338). These antiperspirant ingredients are dispersed in powder form in the mesh.

The amount of the powdered antiperspirant active ingredient is 5 to 30% by weight, preferably 10 to 30% by weight. If the amount is less than this range, a sufficient antiperspirant effect cannot be obtained, and if the amount is more than this range, there will be problems such as easy deterioration during use.

Further, it is preferable to incorporate a surfactant into the stick-form antiperspirant cosmetic composition of the present invention. By doing so, contact between the antiperspirant component and the skin is promoted and antiperspirant efficiency is improved. In addition, remove cosmetics from the skin by washing or bathing with salt 9
Leaving becomes easier. Arata aliphatic ester (Araeel 20 ), polyoxyethylene sorbitol lanolin derivative (Atla
s G-1471), polyoxyethylene lanolin derivative (At1as G-1795), I-lyoxyethylene aliphatic ether (Br1j35), thioxyethylene 25-propylene glycol stearate (G-2
162), I-lyoxyethylene stearate (Myrj
59), $lioxyethylene rubitan aliphatic ether (Tween20)1. f? Chiroxypropylene)
1? Lioxy-engineered tyrene condensate (Pluronlc F-
127).

The amount of the surfactant to be blended can be selected as appropriate, but is usually from 1 to 20% by weight, preferably about 5% by weight, based on the total amount of the cosmetic.

The stick antiperspirant cosmetic of the present invention can also contain other ingredients used in this type of cosmetic. Such optional ingredients include antifouling agents, suspending agents, gluing agents,
Mention may be made of fillers, stabilizers, antioxidants, pigments, colorants, fragrances, preservatives and antimicrobial agents.

The stick antiperspirant cosmetic of the present invention can be produced as follows. First, the oily organic compound, waxes, and any other optional substances of relatively low melting point are mixed and heated to a liquid. Next, a powdered antiperspirant active ingredient and an inorganic powder are added to this liquid and stirred well. Flavors etc. are then added, if applicable, and the mixture is poured into stick molds and allowed to cool.

Next, Examples and Comparative Examples of the present invention will be shown to specifically explain the effects of the present invention. Before explaining each side, the evaluation method adopted by each side will be explained.

Shape retention: The molded product was transferred to a container, and the melting failure and presence or absence of perspiration at each temperature were determined.

Stickiness during use, spread on the skin: Sensory evaluation Shape retention: 20:
No melting and sweating is observed O: No melting and sweating is observed Δ: Slight melting and sweating is observed ×: Melting and sweating is observed No stickiness during use: ○: Yes No stickiness at all Δ: Slight stickiness ×: Stickiness felt Ease of spreading on the skin during use: ◎: Very good spread O:
Good elongation Δ: Slightly poor elongation ×: Poor elongation

Claims (1)

[Claims] (a) 8 to 25% by weight of waxes having a melting point of 50°C to 110°C; (b) 30 to 70% by weight of a volatile oily organic compound having a viscosity of 10 centistokes or less at 25°C; A snack-like antiperspirant cosmetic containing 3 to 20% by weight of an inorganic powder with an oil absorption of 31 to 40% and 5 to 30% by weight of a powdered antiperspirant active ingredient.