JPS6111928B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention provides a novel liquid antiperspirant composition, more specifically, a novel liquid antiperspirant composition containing an antiperspirant substance, a monohydric lower alcohol, a volatile silicone, an alcohol-soluble cellulose derivative, and water as essential components, which has an excellent feeling of use, and further has a long-lasting use. The present invention relates to a transparent liquid antiperspirant composition that is stable over a period of time. Conventionally, liquid antiperspirant compositions containing metal salts such as aluminum salts that have an antiperspirant effect have been used to suppress sweating and prevent the bad odor caused by body odor such as armpits caused by the decomposition of sweat. has been used. However, conventional liquid antiperspirant compositions are made by dissolving a metal salt with an antiperspirant effect in water, a water/ethanol mixture, or ethanol, and then adding fragrances, viscosity modifiers, solubilizers, and polyhydric agents depending on the purpose. alcohol,
Because the composition contained disinfectants, etc., the solvent evaporates during use, and the metal salt becomes sticky during the solidification process, giving the user an unpleasant sticky feeling, and drying takes a relatively long time, making it difficult to wear clothes. However, it has disadvantages such as being easy to get dirty. In addition, when the solvent in the antiperspirant composition evaporates, a metal salt film is formed on the skin surface, but this metal salt film does not have the elasticity and flexibility that skin has, so it does not stick to the skin. An unpleasant feeling of tingling occurs, making it very uncomfortable to use.In addition, because the coating cannot accommodate the expansion and contraction of the skin that occurs with the movement of living organisms, many small cracks occur in the coating, making it difficult to use the antiperspirant composition. The applied area became a white film, giving it an unsightly and unpleasant appearance. Furthermore, the metal salt film with such cracks has poor adhesion to the skin and is easily peeled off from the skin, and the antiperspirant effect of the metal salt described above is not fully exerted, making it less effective in suppressing sweating and preventing body odor. However, it had disadvantages such as not being able to do so. The present inventors have carried out intensive research in order to improve the drawbacks of conventional liquid antiperspirant compositions, and as a result, we have now developed an antiperspirant material that contains volatile silicone and If dissolved together with alcohol-soluble cellulose derivative, drying becomes faster.
In addition, the metal salt coating, which has an antiperspirant effect, has good adhesion to the skin and is less prone to cracking, thus suppressing sweating. The present invention has been completed based on the discovery that a liquid antiperspirant composition can be obtained that can effectively prevent body odor and body odor, does not form a whitening film, and has excellent usability, stability, and antiperspirant effect. did. That is, the present invention

[Table], and the relative ratio of each component of (b) monohydric lower alcohol, (c) volatile silicone, and (v) water is the following point on triangular coordinates, A (75.5:0.6 :23.9),B
(97.9:0.6:1.5) and C (84.5:14.0:1.5) to provide a liquid antiperspirant composition that lies inside the triangle (including on each side). In the present invention, known antiperspirant substances can be used as the antiperspirant substance, such as astringent salts of aluminum and zirconium such as aluminum halide, aluminum hydroxyhalide, zirconyloxyhalide, and zirconylhydroxyhalide; These astringent complexes can be used alone or in combination. Among these antiperspirant materials, aluminum astringent salts are preferred. Typical aluminum astringent salts include aluminum chloride and the general formula Al ₂ (OH) _n
Q _o・xH ₂ O (in the formula, Q represents chlorine, bromine or iodine, m represents 2 to 5, m+n is 6, m
and n need not be an integer, x is approximately 1 to 6
Al ₂ (OH) _n Cl _o .xH ₂ O is particularly suitable. The antiperspirant substance is incorporated in the liquid antiperspirant composition in an amount of 1 to 13% by weight (hereinafter simply referred to as %), preferably 2 to 10%. The monohydric lower alcohol used in the present invention includes monohydric alcohols having 1 to 4 carbon atoms. As the monohydric lower alcohol, ethanol is most suitable from the viewpoint of effectiveness and odor during use.
An ethanol denaturant may be added to ethanol within a range that satisfies standards for cosmetics. The monohydric lower alcohol has a content of 70 to 90% in liquid antiperspirant compositions.
% preferably 75 to 85%. Typical volatile silicones used in the present invention include cyclic or linear low molecular weight polymethylsiloxanes. Cyclic volatile silicone has the general formula (In the formula, n ₁ =3 to 6) and preferably has 3 to 6 silicon atoms, particularly preferably 4 silicon atoms. Linear volatile silicone is represented by the general formula ( _CH3 ) _3Si -O[-Si( _CH3 ) ₂ -O] _-n2Si ( _CH3 ) ₃ (where _n2 = 1 to 3). It is preferable to have 3 to 5 silicon atoms. Examples of such volatile silicones include those manufactured by Dow Corning Co., Ltd.
"DC344", "DC345" and "DC200" from Union Carbide Corporation, and "VS-" from Union Carbide Corporation.
7207” and “VS-7158” are commercially available.
These can be used as appropriate. Volatile silicone is
It is incorporated in the liquid antiperspirant composition in an amount of 0.5 to 13%, preferably 2 to 10%. The liquid antiperspirant composition of the present invention has these monohydric lower alcohols, volatile silicone, and
It is necessary that the relative proportions of these three components, water and water, be within a certain range as shown in FIG. That is,
Monohydric lower alcohol: Volatile silicone: Water is at each point in triangular coordinates, A (75.5:0.6:23.9), B
(97.9:0.6:1.5) and C (84.5:14.0:1.5) must be inside the triangle (including on each side). The alcohol-soluble cellulose derivatives used in the present invention include hydroxypropyl cellulose,
Examples include ethyl cellulose, among which hydroxypropyl cellulose, which is a hydroxypropyl ether of cellulose obtained by reacting cellulose with propylene oxide, is most suitable. Hydro〓〓〓〓
Xypropyl cellulose has the general formula, (wherein, R is H or [-CH ₂ CH(CH ₃ )-O
-] _n1 is an H group, m ₁ is an integer of 1 or more, n ₃ is 300 ~
1000), and the viscosity of the aqueous solution (2%,
20℃) varies depending on the degree of polymerization, but approximately 3000~
A value of 4000cps is preferred. In the invention, it is preferable to use hydroxypropylcellulose having an average molecular weight of 100,000 to 400,000 (particularly 250,000 to 400,000). The alcohol-soluble cellulose derivative is present in the liquid antiperspirant composition in an amount of 0.05 to 2%, preferably 0.1%.
It is blended at 1.5% to 1.5%. The method for producing the liquid antiperspirant composition of the present invention is not particularly limited, and can be easily produced by conventional methods, but preferred production methods include, for example, the following method. That is, an antiperspirant substance and water are mixed and dissolved uniformly, then a monohydric lower alcohol is added thereto and mixed uniformly, and then a solution in which an alcohol-soluble cellulose derivative is uniformly dispersed in volatile silicone is added. It is manufactured by further uniformly and transparently dissolving it. Note that all operations are preferably performed at room temperature to prevent evaporation of the solvent. The liquid antiperspirant composition of the present invention may further contain pigments, fragrances, bactericides, anti-inflammatory agents, chelating agents, viscosity modifiers, wetting agents, surfactants, etc., depending on the purpose of use. . The liquid antiperspirant composition thus obtained dries quickly, has no sticky or sticky feeling, and has a good feeling of use without forming a whitening film. It is transparent and stable, with no precipitation or precipitation. EXAMPLES The present invention will be explained in detail below with reference to Examples, but the present invention is not limited to these Examples. Example 1 A liquid antiperspirant composition having the following composition was prepared, and its stability and sensory feeling on use were evaluated based on the following evaluation criteria. The results are shown in Table 1. The table also shows the liquid state at the time of blending.

[Table] Water balance evaluation criteria Usability: Each inspection item is shown as an absolute evaluation based on the following criteria (the numbers in the table indicate the average value of the evaluation by a panel of 20 people). +2: Very much +1: Somewhat 0: Normal -1: Not very much -2: Not at all Stability: After 3 months of storage 〇: Good ×: Poor〓〓〓〓

[Table] Example 2 In a liquid antiperspirant composition with the following composition, the amounts of ethanol, cyclic silicone, and water were varied, and the liquid state, stability, and The sensory feeling on use was examined and Figure 1 was obtained.

[Table] Water 〓
Example 3 A liquid antiperspirant composition having the following composition was used to examine the effects of various antiperspirant substances on the feeling of use (stickiness and whitening). The results are shown in Table 3. Composition Antiperspirant substance (Table 3) Cyclic silicone 2% (DC344) Ethanol 80 Glycerin 1.0 Hydroxypropyl cellulose 0.3 (HPC-H) Fragrance 0.2 Water Balance

[Table] 〓〓〓〓

[Table]
Example 4 A liquid antiperspirant composition having the following composition was used to examine the effects of various volatile silicones on the feeling of use (stickiness). The results are shown in Table 4.

【table】

[Table] Example 5 A liquid antiperspirant composition having the following composition was used to investigate the influence of various hydroxyalkylcelluloses on the feeling of use (stretching feeling). The results are shown in Table 5. 〓〓〓〓

【table】

[Table] Calculated based on the standard.
Example 6 A liquid antiperspirant composition having the following composition was manufactured.

【table】

【table】

[Table] 〓〓〓〓

[Table] All of the obtained liquid antiperspirant compositions were quick-drying, had no sticky or sticky feeling, had a good feeling of use, and were stable even after long-term storage.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the relative required amount ranges of monohydric alcohol, volatile silicone, and water in a liquid antiperspirant composition. 〓〓〓〓

Claims (1)

[Scope of Claims] 1 Contains [Table], and the relative ratio of each component of (b) monohydric lower alcohol, (c) volatile silicone, and (e) water is at each of the following points on triangular coordinates: , A (75.5:0.6:23.9), B
(97.9:0.6:1.5) and C (84.5:14.0:1.5) A liquid antiperspirant composition characterized by being located inside (including on each side) of a triangle formed by connecting C (84.5:14.0:1.5).