WO2010073815A1 - Deodorant composition and process for producing composite particle - Google Patents

Abstract

A deodorant composition which contains composite particles each comprising (A) zinc oxide and (B) a water-soluble polymeric compound.

Description

Deodorant composition and method for producing composite particles

The present invention relates to a deodorant composition including composite particles containing zinc oxide and a water-soluble polymer compound, and a method for producing composite particles.

Demand for deodorants for body odor is increasing in response to the recent increase in etiquette orientation. In general, as body odor substances, lower fatty acids such as isovaleric acid and nitrogen-containing compounds such as ammonia and butylamine are known. Zinc oxide is known to have a high deodorizing effect on lower fatty acids that cause body odor.

Japanese Patent Laid-Open No. 03-279322 JP 2008-156236 A

In the case of particles such as zinc oxide, the effect increases because the specific surface area increases as the particle diameter decreases. However, zinc oxide has high cohesiveness, particle size increases due to aggregation, deodorizing power decreases, and furthermore, the aggregate is indeterminate and loses the smoothness of the skin when applied to the skin. A feeling of use occurs. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a deodorant composition containing zinc oxide having a high deodorizing effect, excellent sustainability, and good usability.

As a result of intensive studies to achieve the above object, the inventors of the present invention incorporated zinc oxide as a composite particle together with a water-soluble polymer compound into a deodorant composition, thereby suppressing the aggregation of zinc oxide and disintegrating the capsule. Thus, it has been found that the deodorizing effect is high, the sustainability is excellent, and the feeling of use is good, and the present invention has been made.

Accordingly, the present invention provides the following deodorant composition and method for producing composite particles.
[1]. A deodorant composition comprising composite particles containing (A) zinc oxide and (B) a water-soluble polymer compound.
[2]. The deodorant composition according to [1], wherein the composite particles are composite particles obtained by dispersing (A) zinc oxide in (B) a water-soluble polymer compound.
[3]. The deodorant composition according to [1] or [2], wherein the composite particles further contain (C) a liquid oil, and a mass ratio represented by (A) / (C) is 30/70 to 70/30.
[4]. (A) The deodorant composition according to any one of [1] to [3], wherein the content of zinc oxide in the composite particles is 30 to 50% by mass.
[5]. (B) The deodorant composition according to any one of [1] to [4], wherein the content of the water-soluble polymer compound in the composite particles is 30 to 70% by mass.
[6]. (B) The deodorant composition according to any one of [1] to [5], wherein the water-soluble polymer compound is sodium octenyl succinate corn starch ester.
[7]. The deodorant composition according to any one of [1] to [6], wherein the composite particles further contain (D) a cooling agent.
[8]. The deodorant composition according to any one of [1] to [7], which is a deodorant spray.
[9]. (B) Zinc oxide is added to a water-soluble polymer compound-containing aqueous solution containing a water-soluble polymer compound, and the resulting liquid is spray-dried. B) A method for producing composite particles dispersed in a water-soluble polymer compound.
[10]. (B) A dispersion in which (A) zinc oxide is dispersed in (C) liquid oil is added to a water-soluble polymer compound-containing aqueous solution containing a water-soluble polymer compound, and the resulting liquid is spray-dried. A composite particle comprising (A) zinc oxide, (B) a water-soluble polymer compound and (C) liquid oil, wherein (A) zinc oxide is dispersed in (B) the water-soluble polymer compound Production method.

According to the present invention, it is possible to provide a deodorant composition containing zinc oxide that has a high deodorizing effect, is excellent in its sustainability, and has a good feeling in use.

Hereinafter, the present invention will be described in detail.
The deodorant composition of the present invention includes composite particles containing (A) zinc oxide and (B) a water-soluble polymer compound.

(A) Zinc oxide The average particle diameter of zinc oxide is preferably 0.01 to 1 μm, more preferably 0.1 to 0.6 μm. If the average particle size is less than 0.01 μm, the deodorizing effect and the feeling of use may be reduced, and if it exceeds 1 μm, the specific surface area may be reduced and the deodorizing effect and the feeling of use may be reduced.

The content of zinc oxide in the composite particles is preferably 10 to 60% by mass, more preferably 30 to 50% by mass. When the content is less than 10% by mass, the deodorizing effect may be insufficient. When the content exceeds 60% by mass, the particles may aggregate even if they are combined, and the usability may be lowered.

The content of zinc oxide in the deodorant composition is preferably 0.1 to 10% by mass, more preferably 1.0 to 3.0% by mass. If it is less than 0.1% by mass, the deodorizing effect may be insufficient. If it exceeds 10% by mass, the amount of the composite powder provided on the skin may increase, and the feeling of use may be reduced. . In addition, content in a deodorant composition shall say in the undiluted | stock solution composition in the case of aerosol type deodorant spray. *

(B) Water-soluble polymer compound In the present invention, by using zinc oxide and a water-soluble polymer compound in combination, the capsule is disintegrated and zinc oxide is released by contact with moisture, and exhibits a deodorizing effect. Is done. Examples of such water-soluble polymer compounds include natural or modified starch, gum arabic, glycogen, xanthan gum, guar gum, sucrose, lactose, trehalose, guantianose and other oligosaccharides, dextrin, vegetable gum, pectin, alginate and the like. 1 type can be used individually or in combination of 2 or more types as appropriate. Among these, a water-soluble polymer compound that enhances the dispersibility of zinc oxide, has a hydrophobic group, and has surface activity is preferable, and sodium octenyl succinate corn starch ester is preferable.

The content of the water-soluble polymer compound in the composite particles is preferably 27 to 70% by mass, more preferably 30 to 70% by mass. From the viewpoint of obtaining good composite particles, it is more preferably 30% by mass or more, from the viewpoint of zinc oxide release, it is preferably 70% by mass or less, and more preferably 30 to 50% by mass. Further, the content of the water-soluble polymer compound in the deodorant composition is preferably 0.5 to 5% by mass.

(C) Liquid oil In the composite particles, zinc oxide is uniformly dispersed in the water-soluble polymer compound, and as a result, a deodorant composition containing zinc oxide having a high deodorizing effect, excellent sustainability, and good usability. (C) It is preferable to mix | blend liquid oil. Liquid oil refers to oil that is liquid at room temperature (15 to 25 ° C.).

Examples of the liquid oil include liquid paraffin, cetyl isooctanoate, isopropyl myristate, butyl myristate, ethyl oleate, methylpolysiloxane, methylphenylpolysiloxane, etc., alone or in combination of two or more. Can be used. Among these, isopropyl myristate and cetyl isooctanoate are preferable from the viewpoint of dispersibility and usability of zinc oxide.

The blending amount is preferably such that the mass ratio represented by (A) / (C) is 30/70 to 70/30, preferably 50/50 to 60/40. By setting it as this ratio, the deodorizing effect, its sustainability and feeling of use are further improved. The mechanism is not clear, but if the ratio of the liquid oil to zinc oxide is too large, the composite particles are likely to collapse so that the zinc oxide may aggregate. If the ratio of the liquid oil is too small, it will be difficult to disintegrate, and it is estimated that zinc oxide is hardly released. Furthermore, when there is too much ratio of liquid oil, there exists a possibility that it may become sticky and a usability | use_condition may fall.

The content of the liquid oil in the composite particles is preferably 8 to 60% by mass, more preferably 15 to 50% by mass, and further preferably 20 to 30% by mass. 8 mass% or more is preferable from the point which improves the dispersibility of zinc oxide, and suppresses a deodorizing power and the fall of a usability | use_condition, and 60 mass% or less is preferable from the point which obtains a favorable composite particle. The content of liquid oil in the deodorant composition is preferably 0.1 to 5% by mass.

(D) Refreshing agent It is preferable to mix | blend (D) refreshing agent with a composite particle from the point of the deodorizing effect high and its sustainability. Examples of the refreshing agent include l-menthol, l-menthyl glyceryl ether, l-menthyl lactate and the like, which can be used alone or in combination of two or more.

The content of the refreshing agent in the composite particles is preferably 0.1 to 15% by mass, and more preferably 0.2 to 10% by mass. By blending 0.1% by mass or more, the deodorizing effect is further improved, and when it exceeds 15% by mass, irritation may be felt. The content of the refreshing agent in the deodorant composition is preferably 0.01 to 2% by mass.

(E) Silicic anhydride Furthermore, it is preferable to mix | blend silicic acid anhydride with a composite particle from the point of the fluidity | liquidity (handling) of a composite particle, and a usability | use_condition improvement. The content of silicic acid anhydride in the composite particles is preferably 0.1 to 1% by mass.

In addition to the water-soluble polymer compound, the composite particles include other components such as antioxidants, water-soluble vitamins, amino acids, surfactants, preservatives, alcohols, chelating agents, and stabilizers as necessary. May be contained.

Examples of antioxidants include ascorbic acid, alkali metal salts of ascorbic acid, fatty acid esters of ascorbic acid, esters of gallic acid, erythorbic acid, butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), tocopherol , Tocotrienol and the like, and these can be used alone or in combination of two or more.

Examples of water-soluble vitamins include vitamin B1, vitamin B2, vitamin B6, nicotinic acid, nicotinamide, pantothenic acid, vitamin H, folic acid, vitamin B12, choline, inosit, vitamin L1, vitamin L2, vitamin B13, vitamin BT , Lipoic acid, vitamin B14, vitamin B15, vitamin Bx, vitamin P and the like, and these can be used alone or in combination of two or more.

Examples of amino acids include glycine, alanine, valine, leucine, isoleucine, serine, threonine, cysteine, cystine, methionine, aspartic acid, glutamic acid, lysine, arginine, phenylalanine, tyrosine, histidine, tryptophan, proline, and oxypurine. These can be used singly or in appropriate combination of two or more.

[Composite particles]
The composite particle of the present invention contains (A) zinc oxide and (B) a water-soluble polymer compound. Composite particles include a type in which the object to be held is encapsulated in the outer shell base and a type in which the object to be held is dispersed as a fine particle throughout the outer shell base, but the deodorizing effect, its sustainability and From the viewpoint of feeling of use, a type in which the object to be held is dispersed as a fine particle throughout the outer shell base is preferable, and it is a composite particle in which (A) zinc oxide is dispersed in (B) a water-soluble polymer compound. Is preferred. (A) Zinc oxide is preferably dispersed as fine particles, and the average particle diameter of zinc oxide is preferably 0.01 to 1 μm, more preferably 0.1 to 0.6 μm. Also when (C) liquid oil, (D) refreshing agent, (E) silicic acid anhydride, etc. are blended, it is preferable that fine particles are dispersed as (B) a water-soluble polymer compound as an object to be retained. If the object to be held is a type that is encapsulated in the outer shell base, it does not collapse unless physical action such as pressing or friction is applied, and once it collapses, the entire amount of inclusion is released, Even if zinc oxide is dispersed in the composite particles, it aggregates upon release, and therefore, there is a point that is unsuitable for a mechanism for gradually releasing components that cause aggregation. On the other hand, if the object to be retained is a type that is dispersed as fine particles throughout the outer shell base, it partially collapses due to the contact of moisture, and only the object to be retained dispersed in that part. Since it is released, it has an excellent structure as a mechanism for sustained release. The state in which (A) zinc oxide is dispersed in (B) the water-soluble polymer compound is, for example, SEM-EDS analysis (measuring instrument: scanning electron microscope (Hitachi S-2380N), X-ray analyzer ( HORIBA EMAX-7000).

The average particle size of the composite particles is preferably 10 to 75 μm. If the average particle size is less than 10 μm, zinc oxide may aggregate in the composite particles and the deodorizing effect and usability may be reduced, and if it exceeds 75 μm, the usability may be lowered. Furthermore, the average particle size should be 50 μm or less from the viewpoint of good clogging and suppression of clogging when blended in an aerosol type deodorant spray. The average particle diameter in the present invention is a median diameter (a particle diameter at which the cumulative particle amount is 50% by volume), and is a value measured with a measuring instrument: Shimadzu laser diffraction particle size distribution analyzer SALD-2200.

The content of the composite particles in the deodorant composition is preferably 0.1 to 10% by mass. If it is less than 0.1% by mass, the deodorizing effect may be insufficient. If it exceeds 10% by mass, the feeling in use may be lowered.

[Production method of composite particles]
There is no restriction | limiting in particular as a manufacturing method of composite particle | grains, According to the objective, it can select suitably from the conventional microencapsulation method. Examples thereof include a phase separation method, an orifice method, a liquid curing method, a spray drying method, and a freeze drying method. Among these, the spray drying method and the freeze drying method are preferable, and the following spray drying method is particularly preferable.

Specifically, (B) a water-soluble polymer compound-containing aqueous solution containing a water-soluble polymer compound is added to (A) zinc oxide, and the resulting liquid is spray-dried (spray-dried) to form a composite. Particles can be obtained. As the water-soluble polymer compound-containing aqueous solution, a water-soluble polymer compound and 2 to 5 times (mass) of water are preferably used. While stirring the water-soluble polymer compound-containing aqueous solution, zinc oxide may be added and dispersed, emulsified as necessary, and the resulting liquid may be spray-dried. For dispersion, any equipment such as a homomixer or a high-pressure emulsifier can be used. Furthermore, it is preferable to pass the obtained composite particles through a sieve in order to make the particle diameter uniform.

Further, when (C) liquid oil is blended, a dispersion in which (A) zinc oxide is dispersed in (C) liquid oil in a water-soluble polymer compound-containing aqueous solution containing (B) a water-soluble polymer compound. It is preferable to add and spray-dry the resulting liquid. While stirring the water-soluble polymer compound-containing aqueous solution, a dispersion in which zinc oxide is dispersed in a liquid oil is added and emulsified as necessary, and the resulting liquid may be spray-dried. The temperature of the aqueous solution containing the water-soluble polymer compound is not particularly limited as long as it is a temperature at which the water-soluble polymer compound can be dissolved. In order to increase the temperature, the temperature is preferably 50 to 90 ° C., and this temperature range is preferably maintained even after the addition of (A) zinc oxide and (C) liquid oil. In addition, by using a dispersion in which zinc oxide is previously dispersed in liquid oil, the zinc oxide in the composite particles can be uniformly dispersed in the water-soluble polymer compound. As a result, the deodorizing effect and its durability In addition, the usability can be improved. In this case, the blending amount in the dispersion obtained by dispersing zinc oxide in liquid oil is such that the mass ratio represented by (A) / (C) is 30/70 to 70/30, preferably 50/50 to 60 / 40 is preferable.

Furthermore, also when (D) a refreshing agent is blended, it is preferable to dissolve in (B) liquid oil. Although it does not specifically limit about another component, (B) You may dissolve or disperse | distribute to liquid oil, and may add directly to water-soluble high molecular compound containing aqueous solution.

[Deodorant composition]
In the deodorant composition of the present invention, arbitrary components can be blended singly or in appropriate combination of two or more, as long as the effects of the present invention are not impaired. Examples of optional components include anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, oils such as silicone oils and ester oils, inorganic powders, organic powders, and polymers. Compounds, moisturizers, clathrate compounds, vitamins, UV absorbers, amino acids, anti-inflammatory agents, cooling agents, antioxidants, coloring agents, fragrances, antiperspirants, bactericides, deodorants, preservatives , Solvent (ethanol and the like), fatty acid and the like. In addition, a compounding quantity is selected suitably. Further, separately from compounding into the composite particles, (A) zinc oxide, (B) water-soluble polymer compound, (C) liquid oil, (D) cooling agent, (E) silicic anhydride, etc. Good.

Antiperspirants include chlorohydroxyaluminum, zinc paraphenolsulfonate, chlorohydroxyaluminum / propylene glycol, aluminum chloride, aluminum sulfate, aluminum citrate, aluminum acetate, basic aluminum chloride, aluminum phenolsulfonate, β-naphthol disulfone Aluminum oxide, sodium perborate, aluminum zirconium octachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium trichlorohydrate, zirconium chlorohydrate, potassium aluminum sulfate, allantochlorohydroxyaluminum, base Aluminum bromide, aluminum naphthalene Acid, basic aluminum iodide and the like.

Examples of the disinfectant include triclosan, isopropylmethylphenol, benzalkonium chloride, benzethonium chloride, trichlorocarbanilide, chlorhexidine hydrochloride, piroctone olamine, and clara extract.
Examples of the deodorant include magnesia / silica, magnesium oxide, hydroxyapatite and the like.

The deodorant composition of the present invention is preferably substantially water-free and water-free from the viewpoint of the temporal stability of the composition. It is preferable to make it mass% or less.

The form of the deodorant composition of the present invention is not particularly limited, and can be applied to cosmetics, pharmaceuticals, quasi drugs, etc., and can be a body deodorant composition such as acupuncture. The deodorant composition of the present invention can be made into a solid, semi-solid, gel, or liquid dosage form, and can be prepared based on a conventional method of the dosage form. Specifically, it is preferable to use a deodorant spray, a deodorant mist, a deodorant sheet, a deodorant stick, a deodorant roll-on, a deodorant foundation, and the like. Among these, a deodorant spray is preferable and an aerosol type deodorant spray is preferable. When making aerosol type deodorant spray, in addition to deodorant composition (stock solution), liquefied petroleum gas (LPG) such as dimethyl ether, propane, isobutane, normal butane, isopentane, neopentane, and liquefied gas such as dimethyl ether (DME), in addition to these Then, it can be obtained by blending a propellant such as carbon dioxide gas or nitrogen gas and filling an aerosol can. The mass ratio between the deodorant composition (stock solution) and the propellant is preferably in the range of deodorant composition (stock solution) / propellant = 1/99 to 20/80.

Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example. In the following examples, unless otherwise specified, “%” in the composition indicates mass%, the ratio indicates the mass ratio, and the amount of each component in the table is an amount converted into a pure component.

[Preparation of composite particles used in Examples 1 to 5 and 7]
While stirring isopropyl myristate, the total amount of zinc oxide was added to obtain a dispersion. Sodium octenyl succinate starch ester was added to 4 times the amount of water, dissolved by stirring, and heated to 65 ° C. Silicic anhydride and the above dispersion were added thereto, and dispersed at 65 ° C. using a paddle type stirrer, and the dispersion was spray-dried in an atmosphere at 180 ° C. to obtain composite particles. Further, the obtained composite particles were passed through a sieve of a predetermined mesh to obtain composite particles having a desired average particle diameter. In addition, when Example 1 was observed with an SEM-EDS analysis method (measuring instrument: scanning electron microscope (Hitachi S-2380N), X-ray analyzer (HORIBA EMAX-7000), zinc oxide was dispersed in the water-soluble polymer compound. It was confirmed that

[Preparation of composite particles used in Example 6]
While stirring isopropyl myristate, 19 parts of zinc oxide was added to obtain a dispersion. Sodium octenyl succinate starch ester was added to 4 times the amount of water, dissolved by stirring, and heated to 65 ° C. To this is added silicic anhydride and the remaining 33 parts of zinc oxide, and the dispersion is dispersed at 65 ° C. using a paddle type stirrer, and the dispersion is spray-dried in an atmosphere at 180 ° C. to obtain composite particles. It was. Further, the obtained composite particles were passed through a sieve of a predetermined mesh to obtain composite particles having a desired average particle diameter.

[Preparation of composite particles used in Example 8]
Composite particles were obtained in the same manner as in Example 1 except that silicic acid anhydride was not blended.

[Preparation of composite particles used in Example 9]
Composite particles were obtained in the same manner as in Example 1 except that cetyl isooctanoate was used instead of isopropyl myristate.

[Preparation of composite particles used in Examples 10 and 11]
A cooling agent was added and dissolved while stirring isopropyl myristate, and then the total amount of zinc oxide was added to obtain a dispersion. Sodium octenyl succinate starch ester was added to 4 times the amount of water, dissolved by stirring, and heated to 65 ° C. Silicic anhydride and the above dispersion were added thereto, and dispersed at 65 ° C. using a paddle stirrer, and the dispersion was spray-dried in an atmosphere at 180 ° C. to obtain composite particles. Further, the obtained composite particles were passed through a sieve of a predetermined mesh to obtain composite particles having a desired average particle diameter.

[Preparation of composite particles used in Example 12]
Sodium octenyl succinate starch ester was added to 4 times the amount of water, dissolved by stirring and heated to 65 ° C. To this was added silicic acid anhydride and the total amount of zinc oxide, and the mixture was dispersed at 65 ° C. using a paddle type stirrer, and the dispersion was spray-dried in an atmosphere at 180 ° C. to obtain composite particles. Further, the obtained composite particles were passed through a sieve of a predetermined mesh to obtain composite particles having a desired average particle diameter.

[Preparation of composite particles used in Comparative Examples 1 and 3]
Sodium octenyl succinate starch ester was added to 4 times the amount of water, dissolved by stirring and heated to 65 ° C. Silicic anhydride and isopropyl myristate were added thereto and dispersed at 65 ° C. using a paddle type stirrer, and the dispersion was spray-dried in an atmosphere at 180 ° C. to obtain composite particles. Further, the obtained composite particles were passed through a sieve of a predetermined mesh to obtain composite particles having a desired average particle diameter.

[Preparation of composite particles used in Comparative Example 2]
While stirring isopropyl myristate, the total amount of zinc oxide was added to obtain a dispersion. Cellulose was added to 4 times the amount of water, stirred and dispersed, and heated to 90 ° C. Silicic acid anhydride and the above dispersion were added thereto and dispersed at 90 ° C. using a paddle type stirrer, and the dispersion was spray-dried in an atmosphere at 180 ° C. to obtain composite particles. Further, the obtained composite particles were passed through a sieve of a predetermined mesh to obtain composite particles having a desired average particle diameter.

[Preparation of composite particles used in Comparative Examples 4 and 5]
Sodium octenyl succinate starch ester was added to 4 times the amount of water, dissolved by stirring and heated to 65 ° C. Silicic anhydride was added thereto and dispersed at 65 ° C. using a paddle type stirrer, and the dispersion was spray-dried in a 180 ° C. atmosphere to obtain composite particles. Further, the obtained composite particles were passed through a sieve of a predetermined mesh to obtain composite particles having a desired average particle diameter.

[Examples 1 to 12, Comparative Examples 1 to 5]
7% of the composite particles, 24% of chlorohydroxyaluminum, and 10% of silicic acid anhydride were put in a resin container and shaken well to obtain a powder mixture. Separately, in the stock solution composition shown in Table 4 below, the remaining components other than the components used in the preparation of the powder mixture were uniformly mixed to obtain a liquid mixture. The powder mixture was uniformly mixed with this liquid mixture to obtain a stock solution.
Next, the stock solution is put into an aluminum can, clinched with an aluminum valve, and then mixed and filled with a stock solution / propellant (mass ratio) 7/93 to obtain an aerosol type deodorant spray (deodorant composition). It was. The following evaluation was performed about the obtained aerosol type deodorant spray. The results are also shown in Tables 1 to 3.

[Deodorizing effect evaluation method]
For 20 male and female subjects, no treatment was applied to one axilla, and 80 mg of the deodorant composition was applied to the other axilla. Thereafter, 1 hour, 4 hours, and 8 hours after the start of wearing, each subject made a sensory evaluation of the deodorizing effect based on the following evaluation points from the odor of his axilla. A result is shown based on the following deodorant effect criteria based on the sensory evaluation average score of 20 subjects.
<Evaluation point>
3 points: The application part side feels that the deodorization effect is much higher than the non-application part 2 points: The application part side feels that the deodorization effect is considerably higher than the non-application part 1 point: No application on the application part side 0 point that feels a little higher deodorant effect than the part: The application part side is equivalent to the non-application part
<Deodorization effect standards>
◎: The average score of 20 subjects is 2.5 or more ○: The average score of 20 subjects is 2 or more and less than 2.5 Δ: The average score of 20 subjects is 1 or more and less than 2 ×: Subject 20 Human average score is less than 1

[Usage evaluation method]
For 20 male and female subjects, 80 mg of the deodorant composition was applied to the inner part of the forearm, and the touch on the skin was subjected to sensory evaluation based on the following evaluation points. A result is shown based on the following feeling of use based on the sensory evaluation average score of 20 test subjects.
<Evaluation point>
5 points: feels very residual or rough 4 points: feels residual or rough 3 points: feels slightly residual or rough 2 points: hardly feels residual or rough 1 point: feels completely residual or rough do not feel
<Usage standard>
A: The average score of 20 subjects is 1 or more and less than 2 ○: The average score of 20 subjects is 2 or more and less than 3 Δ: The average score of 20 subjects is 3 or more and less than 4 points ×: 20 subjects The average score is 4 or more and 5 or less

A deodorant composition having the following composition was prepared based on a conventional method. These had a high deodorizing effect, excellent sustainability, and good usability.

The raw materials used in preparing the examples and comparative examples are shown below.

Claims (10)

Deodorant composition comprising composite particles containing (A) zinc oxide and (B) water-soluble polymer compound. 2. The deodorant composition according to claim 1, wherein the composite particles are composite particles obtained by dispersing (A) zinc oxide in (B) a water-soluble polymer compound. The deodorant composition according to claim 1 or 2, wherein the composite particles further contain (C) liquid oil, and the mass ratio represented by (A) / (C) is 30/70 to 70/30. The deodorant composition according to any one of claims 1 to 3, wherein the content of (A) zinc oxide in the composite particles is 30 to 50% by mass. The deodorant composition according to any one of claims 1 to 4, wherein the content of the (B) water-soluble polymer compound in the composite particles is 30 to 70% by mass. The deodorant composition according to any one of claims 1 to 5, wherein the water-soluble polymer compound (B) is sodium octenyl succinate corn starch ester. The deodorant composition according to any one of claims 1 to 6, wherein the composite particles further contain (D) a refreshing agent. The deodorant composition according to any one of claims 1 to 7, which is a deodorant spray. (B) Zinc oxide is added to a water-soluble polymer compound-containing aqueous solution containing a water-soluble polymer compound, and the resulting liquid is spray-dried. B) A method for producing composite particles dispersed in a water-soluble polymer compound. (B) A dispersion in which (A) zinc oxide is dispersed in (C) liquid oil is added to a water-soluble polymer compound-containing aqueous solution containing a water-soluble polymer compound, and the resulting liquid is spray-dried. A composite particle comprising (A) zinc oxide, (B) a water-soluble polymer compound and (C) liquid oil, wherein (A) zinc oxide is dispersed in (B) the water-soluble polymer compound Production method.