JP2009102271A - Non-aqueous aerosol-type anti-perspiration deodorant composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-aqueous aerosol type anti-perspiration deodorant composition excellent in deodorizing effect, also without creaking, capable of imparting a smooth touch feeling and excellent in use feeling on applying it to skin. <P>SOLUTION: This non-aqueous aerosol type anti-perspiration deodorant composition includes a stock solution containing at least (A) a hydrophilic powder having ≥50 ml/100 g amount water absorption and (B) an EO-PO-modified silicone, and a propellant, wherein the content of (A) the hydrophilic powdery material in the stock solution is ≥10 mass%. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a non-aqueous aerosol-type antiperspirant deodorant composition, and more specifically, it has an excellent deodorizing effect, and when applied to the skin, it can impart a smooth feel without being squeezed. The present invention relates to a non-aqueous aerosol-type antiperspirant deodorant composition with excellent usability.

  Conventionally, various antiperspirant deodorant agents have been developed in order to reduce the stickiness and discomfort of the skin due to sweat and to suppress the generation of body odors such as side odors. For example, various types of antiperspirant deodorant agents such as aerosols, mists, lotions, sticks, and creams have been commercialized. Among these, aerosol type antiperspirant deodorant agents are used from the viewpoint of usability and convenience. Is the mainstream and further development is underway.

  Conventionally, many hydrophilic powders have been used as deodorizing components in such aerosol-type antiperspirant deodorants. Hydrophilic powder is easy to adsorb to a relatively hydrophilic side odor component (isovaleric acid), so it has an excellent deodorizing effect on the side odor component, but it also has a strong ability to absorb moisture on the skin. When applied, there is a problem that the skin feels dry and feels unnatural and sometimes gives a crisp feel. In particular, there was a problem that the skin that was roughened by the hair removal treatment under the arm felt that it was crushed, and a smooth feel was not felt at all.

  Various techniques have been reported for the purpose of improving the feeling of use of such an aerosol type antiperspirant deodorant agent.For example, for the purpose of suppressing the sticky feeling and stickiness of an aerosol type antiperspirant deodorant agent, Techniques (Patent Documents 1 to 3) for blending polyether-modified silicone in a stock solution of a type antiperspirant deodorant have been reported. However, even these techniques are not fully satisfactory in terms of deodorizing effect and feeling of use.

  Therefore, when applied to the skin, the aerosol-type antiperspirant deodorant composition with excellent usability can be given a smooth feel when applied to the skin. The current situation is still desired.

JP-A-5-229925 JP-A-8-175948 JP 2004-292446 A

  An object of the present invention is to solve the conventional problems and achieve the following objects. That is, the present invention is a non-aqueous aerosol type antiperspirant deodorant composition that has an excellent deodorizing effect and can give a smooth feel when applied to the skin, and has an excellent usability. The purpose is to provide.

  As a result of intensive studies to achieve the above object, the inventors of the present invention have (A) a hydrophilic powder having a water absorption of a certain amount or more in a stock solution of a non-aqueous aerosol type antiperspirant deodorant composition, and (B) The EO / PO-modified silicone is blended and the content of the hydrophilic powder (A) in the stock solution is set to a certain level or more, and the above-mentioned problems can be solved, and the present invention has been completed. It was.

The present invention is based on the above findings by the present inventors, and means for solving the above problems are as follows. That is,
<1> (A) hydrophilic powder having a water absorption of 50 mL / 100 g or more, and (B) a stock solution containing at least EO / PO-modified silicone, and a propellant, and the above-mentioned solution in the stock solution (A) A non-aqueous aerosol type antiperspirant deodorant composition, wherein the content of the hydrophilic powder is 10% by mass or more.
<2> (B) The EO / PO-modified silicone is at least one of a side chain double-ended EO / PO-modified silicone and a linear copolymer ABN type EO / PO-modified silicone, according to <1>. It is a non-aqueous aerosol type antiperspirant deodorant composition.

  According to the present invention, the conventional problems can be solved, the object can be achieved, the deodorizing effect is excellent, and when applied to the skin, a crisp and smooth feel is imparted. It is possible to provide a non-aqueous aerosol type antiperspirant deodorant composition that is excellent in use feeling.

(Non-aqueous aerosol type antiperspirant deodorant composition)
The non-aqueous aerosol type antiperspirant deodorant composition of the present invention contains at least (A) a hydrophilic powder and (B) EO / PO-modified silicone, and further contains other components as necessary. And a propellant. Here, the “non-aqueous” means that the stock solution does not substantially contain water or ethanol, and the stock solution does not substantially contain water or ethanol, so that the skin can dry quickly. There is an advantage that it is excellent in non-stickiness.

<Undiluted solution>
-(A) hydrophilic powder-
The hydrophilic powder is mainly used for the purpose of imparting a deodorizing effect to the non-aqueous aerosol type antiperspirant deodorant composition. The hydrophilic powder is particularly easily adsorbed by a hydrophilic odor component, and is therefore suitable for deodorizing a relatively hydrophilic odor component (for example, a side odor component (isovaleric acid)).
Here, the hydrophilic powder refers to a powder that is dispersed in an aqueous phase when 1 g of the powder is added to 10 g of hexane / 10 g of water and dispersed by ultrasonic waves. As a specific example, There is no restriction | limiting in particular, According to the objective, it can select suitably, For example, silicic acid anhydride (silica), magnesia silica, talc, mica, cellulose, silk, hydroxyapatite etc. are mentioned. Among these, anhydrous silicic acid (silica), magnesia silica, talc, and cellulose are preferable.

Further, the hydrophilic powder has a water absorption of 50 mL / 100 g or more, and preferably 100 mL / 100 g or more. If the water absorption is less than 50 mL / 100 g, there is a problem that a desired degree of deodorizing effect cannot be obtained. On the other hand, when the water absorption is within the preferable range, it is advantageous in that the deodorizing effect is excellent. The upper limit of the water absorption amount of the hydrophilic powder is not particularly limited, but is preferably less than 500 mL / 100 g. When the water absorption is 500 mL / 100 g or more, it is advantageous in terms of the deodorizing effect, but a squeaky feeling may be felt.
In addition, as a measuring method of the water absorption of the said hydrophilic powder, it is as showing in the Example mentioned later.

The said hydrophilic powder may be used individually by 1 type, and may use 2 or more types together.
The content of the hydrophilic powder is 10% by mass or more in the stock solution. There exists a problem that the deodorizing effect of a desired grade is not acquired as the said content is less than 10 mass%. The upper limit of the content of the hydrophilic powder is not particularly limited, but is preferably less than 50% by mass and more preferably less than 30% by mass in the stock solution. When the content is 50% by mass or more, a squeaky sensation at the time of application becomes strong, and the skin may be uncomfortable or the dispersibility of the powder may be inferior. On the other hand, when the content is within the more preferable range, it is advantageous in terms of excellent usability and excellent dispersibility of the powder.

-Other powders-
Moreover, the non-aqueous aerosol type antiperspirant deodorant composition may further contain other powders as required in addition to the component (A).

  Especially, it is preferable that the said non-aqueous aerosol type | mold antiperspirant deodorant composition contains hydrophobic powder as said other powder. By including the hydrophobic powder, it is possible to obtain a good deodorizing effect on lipophilic odor components such as OEO (1-octen-3-one) and androstenone, and therefore, overall The deodorizing effect can be improved. Moreover, a smooth feeling can also be improved by including the said hydrophobic powder. There is no restriction | limiting in particular as said hydrophobic powder, According to the objective, it can select suitably, For example, crosslinked type silicone * network type silicone block copolymer (KSP-101, KSP-102: Shin-Etsu Chemical Co., Ltd. stock) Company), nylon powder (Orgasol S: Iwase Cosfa Co., Ltd.) and the like. Among these, silicone-based hydrophobic powders such as a cross-linked silicone / network-type silicone block copolymer are preferable in terms of improving the deodorizing effect and improving the smooth feeling.

  There is no restriction | limiting in particular also as content in the undiluted | stock solution of the said other powder, According to the objective, it can select suitably within the range which does not impair the effect of this invention.

-(B) EO / PO-modified silicone-
The EO / PO-modified silicone is mainly used for the purpose of suppressing the squeaky feeling of the non-aqueous aerosol type antiperspirant deodorant composition and improving the smooth feeling. Not only does the silicone part of the EO / PO-modified silicone give a smooth feel to the skin, but the polyether part of the EO / PO-modified silicone appropriately retains the moisture on the skin, so that the moisture on the skin is reduced by the powder. It is considered that it is possible to prevent being taken excessively, to suppress a squeaky feeling, and to improve a smooth feeling.
In addition, the present invention has one major feature in using not EO-modified silicone but EO / PO-modified silicone as the component (B). In the solubility with isopropyl myristate, which is often used as a spreading agent for non-aqueous aerosol-type antiperspirant deodorants, EO-modified silicones often cause turbidity, but the oil phase is not uniform. By using the modified silicone, there is an advantage that the solubility with isopropyl myristate is good and the uniformity of the oil phase can be achieved. In addition, since EO is more easily adsorbed to the hydrophilic group on the surface of the hydrophilic powder than EO / PO, there are fewer hydrophilic parts exposed on the skin surface. Therefore, EO-modified silicone has the effect of retaining moisture on the skin. Is lowered, and there is a problem that a desired level of smoothness cannot be imparted.

  The EO / PO-modified silicone is not particularly limited and may be appropriately selected depending on the intended purpose. For example, side chain type (pendant type), side chain both terminal type, linear copolymer ABN type EO. Examples thereof include PO-modified silicone. The ABN type is a linear block copolymer of polyether and silicone.

  Examples of the side chain type (pendant type) EO / PO-modified silicone include PEG / PPG-20-20 dimethicone (SH3749: Toray Dow Corning Co., Ltd.), PEG / PPG-20 / 23 dimethicone (SILSOFT 430, SILSOFT 440: GE Toshiba Silicone Co., Ltd.), PEG / PPG-17 / 17 dimethicone (TSF4452: GE Toshiba Silicone Co., Ltd.), PEG / PPG-20 / 22 butyl ether silicone (KF-6012: Shin-Etsu Chemical Co., Ltd.), and the like.

  Examples of the EO / PO-modified silicone having both side chain ends include organopolysiloxane having a polyoxyalkylene group represented by the following structural formula (1). Specific examples include poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer (for example, ABIL CARE85: Degussa).

In the Structural Formula (1), ^{R 1} is _{(CH 2) n (OC 2} H 4) be _{a (OC 3 H 6) bOR} 4; R 2 is _{(CH 2) n '(OC} 2 H 4 _{) a '(OC 3 H 6} ) be b'OR ^{4; R 3} is _{(CH 2) n "(OC} 2 H 4) a" (OC 3 H 6) b " be OR ^{4; R 4} each is -H or -CH _3; n, n ', and n "represent or integer of 0~3; a, a', and a" is an integer of 0~50; b, b ', And b ″ are each an integer from 0 to 100; l is an integer from 1 to 1000; m is an integer from 1 to 50. However, a + b, a ′ + b ′, and a ″ + b ″ ≧ 1.

  Examples of the linear copolymer ABN type EO / PO-modified silicone include Polysilicone-13 (FZ-2222, FZ-2233: Toray Dow Corning Co., Ltd.).

Among these, as the EO / PO-modified silicone, EO / PO-modified silicone of both side chain end type and linear copolymer ABN type is preferable. EO / PO modified silicone of both side chain end type and linear copolymer ABN type can structurally expose the hydrophilic part to the skin surface even if it is adsorbed to hydrophilic powder. This is advantageous in that the retention effect is high and, therefore, the squeaky feeling of the non-aqueous aerosol-type antiperspirant deodorant can be suppressed and the smooth feeling can be further improved.
The EO / PO-modified silicone preferably has an HLB of 7 to 12 and a viscosity of 500 cs or more. Having the HLB and viscosity as described above is advantageous in that the solubility in oil (for example, isopropyl myristate) and the dispersibility of the powder can be improved.
The EO / PO-modified silicone is preferably in a liquid state at room temperature. When the EO / PO-modified silicone is in a solid to paste form, when the oil phase of the stock solution is stored at a low temperature, turbidity may occur and the uniformity of the oil phase may not be maintained.

The EO / PO-modified silicone may be used alone or in combination of two or more.
The content of the EO / PO-modified silicone is preferably 1 to 50% by mass and more preferably 3 to 30% by mass in the stock solution. When the content is less than 1% by mass, the desired degree of squeaky effect may not be obtained. When the content exceeds 50% by mass, a slipperiness peculiar to silicone is felt at the time of application. May give pleasure. On the other hand, when the content is in the more preferable range, it is advantageous in that it is excellent in the effect of suppressing squeakiness and the effect of improving the feeling of slipping, and does not cause an unpleasant feeling of slipping. .

-Other ingredients-
Other components other than the component (A), the other powder, and the component (B) that can be contained in the stock solution are not particularly limited, and are commonly used in conventional antiperspirant deodorant agents. It can be appropriately selected according to the purpose from among the components, for example, antiperspirant components such as aluminum chloride, aluminum sulfate, chlorohydroxyaluminum, chlorohydroxyaluminum / zirconium, zinc paraphenolsulfonate, surfactants, Fats and oils, waxes, higher fatty acids, silicones, higher alcohols, citric acid, succinic acid, tartaric acid and other hydroxycarboxylic acids, antioxidants, fragrances, preservatives, UV absorbers, chelating agents, humectants, skin protectants , Thickeners, refreshing agents, bactericides, anti-inflammatory agents, amino acids, vitamins and the like. Since the non-aqueous aerosol type antiperspirant deodorant is non-aqueous, the stock solution does not substantially contain water or ethanol.
There is no restriction | limiting in particular also as content in the undiluted | stock solution of the said other component, According to the objective, it can select suitably within the range which does not impair the effect of this invention.

<Propellant>
There is no restriction | limiting in particular as said propellant, According to the objective, it can select suitably, For example, liquefied petroleum gas, such as propane and butane, isopentane, dimethyl ether etc. are mentioned.

The said propellant may be used individually by 1 type, and may use 2 or more types together.
The content of the propellant is not particularly limited and may be appropriately selected depending on the intended purpose. However, the mass ratio with respect to the content of the stock solution is stock solution / propellant = 1/99 to 40/60. The ratio is preferably 4/96 to 20/80. When the content of the propellant is less than 60% by mass, the undiluted solution is often attached to the skin, causing dripping on the skin, and when the content exceeds 99% by mass. A sufficient deodorizing effect may not be obtained due to a decrease in the amount of the undiluted solution attached to the skin. On the other hand, when the content is within the more preferable range, the stock solution adheres to the skin in an appropriate amount, and therefore, it is advantageous in that it has a better feeling of use and a desired deodorizing effect can be easily obtained. It is.

<Manufacturing method>
There is no restriction | limiting in particular as a manufacturing method of the said non-aqueous aerosol type | mold antiperspirant deodorant agent composition, According to the objective, it can select suitably. For example, (A) hydrophilic powder, (B) EO / PO-modified silicone, and other components (including other powders other than the component (A)) as necessary, as described above The non-aqueous aerosol type antiperspirant deodorant composition can be produced by preparing a stock solution by blending so as to have a desired content and blending a propellant thereto.

Moreover, the non-aqueous aerosol type antiperspirant deodorant composition can be filled in, for example, a general aerosol container by a usual method.
Examples of the aerosol container include a container body, a valve fixed to the opening of the container body, and a spray button. Examples of the material of the container body include metals such as aluminum, stainless steel, and tin, resins such as polyethylene terephthalate, and pressure-resistant glass. Moreover, the surface of the container main body may be coated with a resin or the like for the purpose of improving pressure resistance, impact resistance, corrosion resistance, formulation stability, and the like. Examples of the valve include a mounting cup that is crimped to the opening of the container body, a housing that is held at the center of the mounting cup, a stem that is accommodated in the housing so as to be movable up and down, and the stem. A stem rubber that opens and closes the hole, a spring that constantly biases the stem upward, and a dip tube that extends from the lower end of the housing to the bottom of the container.
Examples of the filling method include a cooling filling method, a pressure filling method, and an undercup filling method.

<Usage and effect>
The method of using the non-aqueous aerosol-type antiperspirant deodorant composition is not particularly limited and can be appropriately selected depending on the purpose.For example, it reduces the stickiness and discomfort of the skin due to sweat, and the side odor It can be sprayed and applied to the site where it is desired to suppress the generation of body odor. Moreover, there is no restriction | limiting in particular also as an application quantity in the case of application | coating, According to the objective, it can select suitably.
The non-aqueous aerosol-type antiperspirant deodorant composition has an excellent deodorizing effect, and when applied to the skin, it can give a smooth and smooth feel. It can be suitably used as an antiperspirant deodorant with excellent feeling.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited to these Examples. In the following Examples and Comparative Examples, unless otherwise specified, “%” represents “mass%” and the ratios represent mass ratios.

(Examples 1-13, Comparative Examples 1-5)
In accordance with the compositions shown in Tables 1 to 4 below, the nonaqueous aerosol type antiperspirant deodorant compositions of Examples 1 to 13 and Comparative Examples 1 to 5 were prepared by a conventional method. Specifically, each component of the stock solution was mixed, and the obtained stock solution was filled in an aerosol container together with a propellant.
The water absorption amount (mL / 100 g) of the powder used was as follows according to JIS K 5101-13-2 (boiled sea urchin oil method), replacing the boiled sea urchin oil with purified water. Asked. 1 g of the powder was taken in a petri dish, and purified water was dropped little by little with a burette, and each time, the powder and purified water were kneaded with a spoon. Purified water was added dropwise until the kneaded material, which was a hard putty-like mass, turned into a spiral state, and the kneading operation was repeated. The end point was when the kneaded product was spirally wound, and the amount of purified water required up to the end point was converted as the water absorption amount of the powder (mL / 100 g). The water absorption of the powder (component (A)) used in each example and comparative example is also shown in Tables 1 to 4. (For Comparative Examples 2 to 3, the water absorption of silica (NP-30) and nylon powder is shown to indicate that it does not fall under component (A).)
About each obtained non-aqueous aerosol type antiperspirant deodorant composition, the deodorizing effect (evaluation by deodorization rate measurement, sensory evaluation) and the feeling of use (no creaking, smooth feeling) are evaluated by the following methods. did. A result is combined with Tables 1-4 and shown.

<Evaluation of deodorization effect (evaluation by measuring deodorization rate of isovaleric acid)>
Each non-aqueous aerosol type antiperspirant deodorant composition was sprayed on the membrane filter for 2 seconds. This was placed in a 22 mL GC vial, and 30 μL of a 2% by weight aqueous solution of isovaleric acid was dropped, and then sealed and left at 34 ° C. for 5 minutes. Thereafter, the concentration of isovaleric acid in the head space was measured using gas chromatography. The deodorization rate (%) of isovaleric acid was calculated using the following formula and evaluated according to the following evaluation criteria.
Deodorization rate of isovaleric acid (%) = [(peak area of isovaleric acid when powder is not added−peak area of isovaleric acid when powder is added) / (isovaleric acid when powder is not added) Peak area)] × 100
-Evaluation criteria-
◎: Deodorization rate is 80% or more ○: Deodorization rate is 60% or more △: Deodorization rate is 40% or more ×: Deodorization rate is 20% or more

<Evaluation of deodorization effect (evaluation by measuring deodorization rate of OEO)>
Each non-aqueous aerosol type antiperspirant deodorant composition was sprayed on the membrane filter for 2 seconds. This was placed in a 22 mL GC vial, and 30 μL of an OEO 0.5 mass% / 50% ethanol solution was added dropwise, which was then sealed and left at 34 ° C. for 5 minutes. Then, the OEO density | concentration in a head space was measured using the gas chromatography. The deodorization rate (%) of OEO was calculated using the following formula and evaluated according to the following evaluation criteria.
OEO deodorization rate (%) = [(peak area of OEO when powder is not added−peak area of OEO when powder is not added) / (peak area of OEO when powder is not added)] × 100
-Evaluation criteria-
◎: Deodorization rate is 80% or more ○: Deodorization rate is 60% or more △: Deodorization rate is 40% or more ×: Deodorization rate is 20% or more

<Evaluation of deodorizing effect (sensory evaluation)>
10 male subjects were sprayed with each non-aqueous aerosol type antiperspirant deodorant composition for 2 seconds, and 8 hours after spraying, the axilla was scraped off at the bottom of the test tube, and the odor attached to the test tube was examined. Sensory evaluation. The evaluation criteria are as follows. In addition, the average score about 10 test subjects was shown as a result.
-Evaluation criteria-
5 points: Strong smell.
4 points: Strong odor.
3 points: A smell that can be easily detected.
2 points: Smell enough to understand what kind of smell (recognition threshold).
1 point: A smell that can be finally detected (detection threshold).
0 point: odorless.

<Evaluation of feeling of use (no creaking, smooth feeling)>
Each non-aqueous aerosol-type antiperspirant deodorant composition was spray-applied in an appropriate amount to the inner side of the forearm of 10 professional panelists, and evaluated for the absence of creaking and smooth feeling according to the following evaluation criteria. The average score of 10 professional panelists was shown as a result.
Note that “no creaking” refers to the condition that the finger does not feel when it touches the skin with a finger, and “smooth” refers to resistance against the finger and the skin when touching the skin with the finger. A state in which the user feels slippery and feels moderately moist.
-Evaluation criteria (no creaking, smooth feeling)-
5 points: Very good.
4 points: Good.
3 points: Neither can be said.
2 points: Bad.
1 point: Very bad.

  From the results of Tables 1 to 4, (A) hydrophilic powder having a certain amount of water absorption and (B) EO / PO-modified silicone, and (A) hydrophilic powder in the stock solution The non-aqueous aerosol-type antiperspirant deodorant composition of Examples 1 to 13 in which the content of the non-aqueous aerosol-type antiperspirant of Comparative Examples 1 to 5 does not satisfy at least one of the above requirements. Compared with deodorant composition, non-aqueous aerosol type antiperspirant deodorant with excellent deodorizing effect and excellent usability when it is applied to the skin and gives a smooth and smooth feel. It was found to be a composition.

  In addition, the detail of each component used by the said Example and comparative example is as follows.

※香料は特開２００３−７３２４９号公報の表２３〜３５に記載された組成Ａを使用した。

* The fragrance | flavor used the composition A described in Table 23-35 of Unexamined-Japanese-Patent No. 2003-73249.

  The non-aqueous aerosol-type antiperspirant deodorant composition of the present invention has an excellent deodorizing effect and can impart a smooth feel when applied to the skin. It can be suitably used as an antiperspirant deodorant agent with excellent deodorizing effect and usability to reduce stickiness, discomfort, and the like, and to suppress the generation of body odors such as side odors.

Claims (2)

  (A) hydrophilic powder having a water absorption of 50 mL / 100 g or more, and (B) a stock solution containing at least EO / PO-modified silicone, and a propellant, and the (A) in the stock solution A non-aqueous aerosol type antiperspirant deodorant composition, wherein the content of the hydrophilic powder is 10% by mass or more.   The non-aqueous aerosol type according to claim 1, wherein the (B) EO / PO-modified silicone is at least one of a side chain double-ended EO / PO-modified silicone and a linear copolymer ABN type EO / PO-modified silicone. Antiperspirant deodorant composition.