Deodorizing composition

Abstract

To provide deodorant means capable of being used for a relatively small sized deodorant product, and provide novel means for reducing acetic acid odor.SOLUTION: There is provided a deodorant composition including, as a deodorant component, at least one selected from a following group: tripropylene glycol methyl ether; tripropylene glycol n-buthyl ether; dipropylene glycol methyl ether; propylene glycol methyl ether acetate; propylene glycol n-buthyl ether; propylene glycol phenyl ether; 3-methoxy-3-methyl-1-butanol; 3-methoxy-3-methyl-1-butyl acetate; 2,2-dimethyl-1,3-dioxolane-4-methanol; propanol; and N-methyl-2-pyrolidone.SELECTED DRAWING: None

Description

[Technical Field]

[0001] This relates to a deodorizing composition. [Background technology]

[0002] In recent years, various deodorizing products have become known for their purpose of eliminating odors in living spaces, aiming to provide a more comfortable living environment. These deodorizing products often utilize water-soluble deodorizing components. In this case, water is primarily used as the solvent, and the deodorizing components are dissolved in water before being used for deodorization.

[0003] However, when dissolving deodorizing components in a solvent such as water, a deodorizing product requires at least the deodorizing components and an amount of solvent sufficient to dissolve them. This means that the amount of solvent is large, and therefore, it is not always possible to miniaturize the deodorizing product.

[0004] Furthermore, while various types of deodorizing products are known, such as stand-alone, spray, and aerosol types, similar types of products are also known for their fragrance properties (fragrance products). In recent years, reed diffuser-type products, which use reeds (thin sticks, etc.) inserted into a container, have been increasing in popularity among fragrance products due to their relatively space-saving design and aesthetic appeal. However, even when attempting to use water-soluble deodorizing components in reed diffuser-type products, the large volume of solvent required makes them unsuitable for space-saving deodorizing products.

[0005] On the other hand, dimer acids and trimer acids have been reported as oil-soluble deodorizing components, and these are known to be useful in deodorizing ammonia and amines (Patent Document 1). Acetic acid is also known as one of the main malodorous components, and its sources are known to be body odor, food waste, feces, and pets. For this reason, it is important to reduce acetic acid odor in living spaces. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2012-183189 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] This disclosure aims to provide a novel means for reducing acetic acid odor. It also aims to provide a deodorizing method that can be used in relatively small-sized deodorizing products. [Means for solving the problem]

[0008] As a result of diligent research conducted in view of the above-mentioned problems, the present inventors have found that the following components, namely, tripropylene glycol methyl ether, tripropylene glycol n-butyl ether, dipropylene glycol methyl ether, propylene glycol methyl ether acetate, propylene glycol n-butyl ether, propylene glycol phenyl ether, 3-methoxy-3-methyl-1-butanol, 3-methoxy-3-methyl-1-butyl acetate, 2,2-dimethyl-1,3-dioxolane-4-methanol, propanol, and N-methyl-2-pyrrolidone, can effectively reduce the acetic acid odor. The present invention was completed through further research based on this finding, and this disclosure includes, for example, the inventions represented below. Item 1. A deodorizing composition containing at least one component selected from the following group as a deodorizing component: Tripropylene glycol methyl ether, tripropylene glycol n-butyl ether, dipropylene glycol methyl ether, propylene glycol methyl ether acetate, propylene glycol n-butyl ether, propylene glycol phenyl ether, 3-methoxy-3-methyl-1-butanol, 3-methoxy-3-methyl-1-butyl acetate, 2,2-dimethyl-1,3-dioxolane-4-methanol, propanol, and N-methyl-2-pyrrolidone. Item 2. A deodorizing and fragrance composition containing at least one component selected from the following group as a deodorizing component, and also containing a fragrance: Tripropylene glycol methyl ether, tripropylene glycol n-butyl ether, dipropylene glycol methyl ether, propylene glycol methyl ether acetate, propylene glycol n-butyl ether, propylene glycol phenyl ether, 3-methoxy-3-methyl-1-butanol, 3-methoxy-3-methyl-1-butyl acetate, 2,2-dimethyl-1,3-dioxolane-4-methanol, propanol, and N-methyl-2-pyrrolidone. Item 3. The deodorizing and fragrance composition according to Item 2, wherein the deodorizing component is at least one selected from the group consisting of tripropylene glycol methyl ether, propylene glycol phenyl ether, 3-methoxy-3-methyl-1-butanol, and 2,2-dimethyl-1,3-dioxolane-4-methanol. Item 4. A deodorizing composition according to Item 1 or a deodorizing and fragrance composition according to Item 2 or 3, which contains only at least one component selected from the group above as a deodorizing component. Item 5. A method of using a component as a deodorizing component, characterized by imparting a deodorizing effect to a composition by incorporating at least one component selected from the group below into the composition: Tripropylene glycol methyl ether, tripropylene glycol n-butyl ether, dipropylene glycol methyl ether, propylene glycol methyl ether acetate, propylene glycol n-butyl ether, propylene glycol phenyl ether, 3-methoxy-3-methyl-1-butanol, 3-methoxy-3-methyl-1-butyl acetate, 2,2-dimethyl-1,3-dioxolane-4-methanol, propanol, and N-methyl-2-pyrrolidone. [Effects of the Invention]

[0009] This disclosure provides a novel technology that uses at least one component selected from the aforementioned group as a deodorizing component. According to the deodorizing composition of this disclosure, acetic acid odor can be mitigated by using at least one component selected from the aforementioned group as an active deodorizing component. Since this component does not necessarily need to be soluble in a solvent such as water, it is also useful in providing relatively small deodorizing products and can be used in various deodorizing products, including reed diffusers. Furthermore, according to this disclosure, a deodorizing and fragrance composition can be provided by using this component in combination with a fragrance. [Modes for carrying out the invention]

[0010] The embodiments included in this disclosure are described in further detail below.

[0011] This disclosure encompasses deodorizing compositions containing at least one component selected from the following group as a deodorizing component. (1) Tripropylene glycol methyl ether (2) Tripropylene glycol n-butyl ether (3) Dipropylene glycol methyl ether (4) Propylene glycol methyl ether acetate (5) Propylene glycol n-butyl ether (6) Propylene glycol phenyl ether (7) 3-Methoxy-3-methyl-1-butanol (8) 3-Methoxy-3-methyl-1-butylacetate (9) 2,2-dimethyl-1,3-dioxolane-4-methanol (10) Propanol, and (11) N-methyl-2-pyrrolidone.

[0012] Each component is explained as follows: (1) Tripropylene glycol methyl ether has molecular formula C 10 H 22It is a component represented by O4 and CAS No. 25498-49-1. As tripropylene glycol methyl ether, commercially available products may be used, for example, Dowanol (trademark) TPM (manufactured by Dow Chemical Japan Ltd.) and the like.

[0013] (2) Tripropylene glycol n-butyl ether has the molecular formula C 13 H 28 It is a component represented by O4 and CAS No. 55934-93-5. As tripropylene glycol n-butyl ether, commercially available products may be used, for example, Dowanol (trademark) TPnB (manufactured by Dow Chemical Japan Ltd.) and the like.

[0014] (3) Dipropylene glycol methyl ether has the molecular formula C6H 16 O3 and is a component represented by CAS No. �4590-94-8. As dipropylene glycol methyl ether, commercially available products may be used, for example, Dowanol (trademark) DPM (manufactured by Dow Chemical Japan Ltd.) and the like.

[0015] (4) Propylene glycol methyl ether acetate has the molecular formula C6H 12 O3 and is a component represented by CAS No. 108-65-6. As propylene glycol methyl ether acetate, commercially available products may be used, for example, Dowanol (trademark) PMA (manufactured by Dow Chemical Japan Ltd.) and the like.

[0016] (5) Propylene glycol n-butyl ether has the molecular formula C7H 16 O2 and is a component represented by CAS No. 5131-66-8. As propylene glycol n-butyl ether, commercially available products may be used, for example, Dowanol (trademark) PnB (manufactured by Dow Chemical Japan Ltd.) and the like.

[0017] (6) Propylene glycol phenyl ether has the molecular formula C9H 12O2 is a component represented by CAS No. 770-35-4. As propylene glycol phenyl ether, commercially available products may be used, for example, Dowanol (trademark) PPH (manufactured by Dow Chemical Japan Co., Ltd.) and the like.

[0018] (7) 3-Methoxy-3-methyl-1-butanol has the molecular formula C6H 14 O2 is a component represented by CAS No. 56539-66-3. As 3-methoxy-3-methyl-1-butanol, commercially available products may be used, for example, Solfit (registered trademark) (manufactured by Kuraray Co., Ltd.) and the like.

[0019] (8) 3-Methoxy-3-methyl-1-butyl acetate has the molecular formula C8H 16 O3 is a component represented by CAS No. 103429-90-9. As 3-methoxy-3-methyl-1-butyl acetate, commercially available products may be used, for example, Solfit (registered trademark) AC (manufactured by Kuraray Co., Ltd.) and the like.

[0020] (9) 2,2-Dimethyl-1,3-dioxolan-4-methanol has the molecular formula C6H 12 O3 is a component represented by CAS No. 100-79-8. As 2,2-dimethyl-1,3-dioxolan-4-methanol, commercially available products may be used, for example, AUGEO CLEAN MULTI (registered trademark) (manufactured by Solvay Japan K.K.) and the like.

[0021] (10) Examples of propanol include 1-propanol, 2-propanol, etc., and preferably 1-propanol is exemplified.

[0022] (11) N-Methyl-2-pyrrolidone has the molecular formula C5H9NO and is a component represented by CAS No. 872-50-4. As N-methyl-2-pyrrolidone, commercially available products may be used, for example, NMP (manufactured by Lion del) and the like.

[0023] While not limiting this disclosure, components (1) to (10) are more preferably included as examples of these components. Further preferred examples of these components include (1) tripropylene glycol methyl ether, (6) propylene glycol phenyl ether, (7) 3-methoxy-3-methyl-1-butanol, and (9) 2,2-dimethyl-1,3-dioxolane-4-methanol. For example, components (1) to (6) can be considered glycol ethers, and components (7) to (10) can be considered alcohols.

[0024] In the deodorizing composition of this disclosure, components (1) to (11) may be used individually or in combination of two or more.

[0025] In the deodorizing composition of this disclosure, the content of at least one selected from the group consisting of components (1) to (11) is not limited and may be appropriately determined depending on the strength (concentration) of the acetic acid odor to be deodorized, the form of the composition, the manner of use, the installation location, the degree of expected effect, etc. Although not limiting to this disclosure, examples of the content of at least one (total amount) selected from the group consisting of components (1) to (11) in the deodorizing composition are 1% by mass or more and less than 100% by mass, preferably 5% by mass or more and 95% by mass or less, and more preferably 5% by mass or more and 10% by mass or less. The content is not limited as long as it is any value (range) within these numerical ranges.

[0026] The deodorizing compositions of this disclosure may further contain any other components that can be incorporated into the deodorizing composition, to the extent that they do not interfere with the effects of this disclosure. Examples of such other components, without limiting this disclosure, include solvents (ethers, esters, glycols, oils and fats, hydrocarbons, ketones, fatty acids, alcohols, water, etc.), surfactants, fragrances, colorants, gelling agents, repellents, preservatives, insecticides, antioxidants, light stabilizers, pH adjusters, UV absorbers, antibacterial agents, fungicides, and deodorizing components other than those listed in components (1) to (11). These other components may be selected as appropriate depending on the purpose, and may be used alone or in combination of two or more, with their amounts being determined as appropriate. Although components (1) to (11) are known as solvents, in this disclosure they are used as deodorizing components and are not included in the category of any other components.

[0027] Without limiting this disclosure, examples of other components include solvents such as isoparaffinic solvents and water. These may be used individually or in combination of two or more.

[0028] Without limiting this disclosure, for example, isoparaffinic solvents include isoparaffinic hydrocarbon solvents, and commercially available examples of such solvents include ISOPAR® G, ISOPAR® H, ISOPAR® L, and ISOPAR® M (all manufactured by ExxonMobil).

[0029] Without limiting this disclosure, when describing water as a solvent, there are no particular restrictions on the type of water, and examples include purified water, distilled water, deionized water, ultrapure water, and sterile water.

[0030] Without limiting this disclosure, examples of other components include surfactants. The type of surfactant is not particularly limited and can be set as appropriate, with cationic surfactants, anionic surfactants, nonionic surfactants, amphoteric surfactants, etc. Surfactants may be used alone or in combination of two or more types.

[0031] Without limiting this disclosure, examples of other components include deodorizing components (other than components (1) to (11)), such as dimer acids and trimer acids. The content of the deodorizing components (other than components (1) to (11)) can be appropriately set depending on the type of deodorizing component, the type of substance causing the malodorous odor, the form of the composition, the expected degree of effect, etc. Examples of the deodorizing compositions of this disclosure include 0.5% by mass or more and 15% by mass or less, preferably 1% by mass or more and 10% by mass or less. The compositions of this disclosure may be prepared by incorporating deodorizing components other than components (1) to (11) as described above, or they may be prepared without incorporating them.

[0032] Without limiting this disclosure, as an example of other components, fragrances are not limited to those that do not interfere with the effects of this disclosure, and examples include conventionally known fragrances such as natural fragrances, individual fragrances separated from natural fragrances, synthetic fragrances (including synthesized individual fragrances), and any blends thereof. Furthermore, if a fragrance is included, the amount of fragrance may be set appropriately depending on the form of the deodorizing composition of this disclosure, the type of fragrance, the manner of use, the degree of expected effect, etc., but examples include 0.05% by mass or more, preferably 1% by mass or more and 20% by mass or less, and more preferably 10% by mass or more and 20% by mass or less in the composition.

[0033] If the deodorizing composition of this disclosure contains a fragrance, the deodorizing composition of this disclosure may also be called a deodorizing and fragrance composition. In addition to producing a pleasant fragrance, the fragrance may also have properties such as repelling pests. If such a fragrance is included, the deodorizing composition and the deodorizing and fragrance composition of this disclosure can be said to have useful properties due to the fragrance, such as repellent properties. For this reason, in such cases, the deodorizing composition of this disclosure may be used for such useful properties as well as its deodorizing effect.

[0034] The form of the deodorizing composition of this disclosure is not particularly limited and may be liquid, gel, solid, etc., and is preferably liquid.

[0035] The deodorizing compositions of this disclosure can be manufactured by following conventionally known procedures, by selecting at least one component from the group consisting of components (1) to (11), and, depending on the form of the composition, appropriately selecting and mixing any other components as needed.

[0036] The deodorizing composition disclosed herein may be used by any means such as volatilization, spraying, or coating, and in this respect, it may be used as any product such as a stationary type (including reed diffusers, etc.), spray type, aerosol type, or wipe type (deodorizing sheet, etc.). In this way, the manner of use is not limited, but for example, in the case of a stationary product, the deodorizing composition disclosed herein may be used by housing it in a container with an opening or by impregnating (absorbing liquid) an absorbent material, and the stationary product should be placed in or near the object to be deodorized (in a space, etc.). The deodorizing effect is exerted when the deodorizing components volatilize in or near the object to be deodorized. Volatilization may occur by leaving it alone (natural volatilization), or by heating, etc., and the means of volatilization are not limited. In terms of simplicity, volatilization of the deodorizing components by leaving it alone is preferably exemplified. Furthermore, the deodorizing composition disclosed herein may be encapsulated in capsules such as microcapsules, as long as the effects of the disclosure are obtained.

[0037] In this disclosure, any known container with an opening may be used as the container with an opening, and its material, shape, size (e.g., a capacity of 70 mL to 140 mL) is not limited and may be appropriately set according to the components incorporated into the deodorizing composition of this disclosure, the design, ease of use, etc. The deodorizing composition of this disclosure contains at least one component selected from (1) to (11) above, and the component can be used without dissolving in a solvent such as water. Furthermore, the amount of the deodorizing composition of this disclosure contained may be a small amount, such as half or less of the container capacity, one-third or less, or one-quarter or less.

[0038] Furthermore, the liquid-absorbing member impregnated with the deodorizing composition of this disclosure may be any known liquid-absorbing member conventionally used in the art, and its material, shape, size, etc., are not limited and may be appropriately set according to the components incorporated into the deodorizing composition of this disclosure, design, ease of use, etc. Although not limiting to this disclosure, examples of liquid-absorbing members include fibrous materials such as natural fibers such as pulp, synthetic fibers such as polyester, mixed fibers thereof, woody materials such as rattan, and foamed urethane resin sponge materials, and any combination of these may be used. In addition, the liquid-absorbing member may be woven fabric, nonwoven fabric, filter paper, etc., and may be in the form of a sheet, a rod, etc., and any combination of these may be used.

[0039] The deodorizing compositions of this disclosure are preferably used in combination, for example, with a container capable of containing the deodorizing composition and an absorbent member. Without limiting the disclosure, an example of a volatilizer comprising the container and the absorbent member includes at least a container having an opening, an absorbent member, and the deodorizing composition of this disclosure contained in the container. At least a portion of the absorbent member is positioned to be in direct contact (e.g., immersion) with the deodorizing composition of this disclosure. The volatilizer may be positioned so that at least a portion of the absorbent member is exposed to the outside of the container through the opening. By using such a volatilizer, the absorbent member absorbs and volatilizes the deodorizing composition of this disclosure, allowing the deodorizing components to be efficiently volatilized to the outside of the container. An example of a volatilizer in which at least a portion of the absorbent member is exposed to the outside of the container through the opening is a reed diffuser type volatilizer used with a reed (thin stick, etc.) inserted into the container.

[0040] When the deodorizing composition of this disclosure is used as a spray or aerosol product, the deodorizing composition of this disclosure should be placed in a spray container or aerosol container and sprayed into the space to be deodorized, the object to be deodorized, or its vicinity, in accordance with conventionally known procedures. When the deodorizing composition of this disclosure is used as a wipe-off product (such as a deodorizing sheet), the deodorizing composition of this disclosure should be impregnated into any cloth, including conventionally known nonwoven fabrics, and the surface of the object to be deodorized should be wiped with the cloth.

[0041] The applications of the deodorizing compositions of this disclosure are not limited, and examples of applications include spaces (indoor spaces, car interiors, etc.), curtains, sofas, bedding, clothing and other textile products, leather products, shoes, walls, floors, ceilings, doors, furniture, pet keeping areas, etc. Although not limiting to this disclosure, preferred applications of the deodorizing compositions of this disclosure include indoor spaces such as living rooms, toilets, entrances, shoe cabinets, and car interiors, as well as car interiors. Since the components selected from (1) to (11) above can reduce acetic acid odor at least, the deodorizing compositions of this disclosure can reduce or eliminate acetic acid odor in or near these applications.

[0042] As mentioned above, acetic acid is known as one of the main malodorous components, and its sources are known to be body odor, food waste, feces, pets, etc. The deodorizing composition of this disclosure containing at least one selected from the group consisting of components (1) to (11) as a deodorizing component (deodorizing active ingredient) is useful for reducing or eliminating acetic acid odor at least. Furthermore, as shown in the examples described below, at least components (1) to (10) can be said to have an effective deodorizing effect against isovaleric acid (3-methylbutanoic acid), which is also known as one of the main malodorous components. Therefore, the deodorizing composition of this disclosure containing these components can be said to be useful not only for reducing or eliminating acetic acid odor but also for reducing or eliminating isovaleric acid odor.

[0043] Furthermore, as mentioned above, unlike the water-soluble deodorizing components widely used in conventional deodorizing compositions, one component selected from the group consisting of (1) to (11) above does not necessarily need to be dissolved in a solvent. Therefore, the amount of liquid required for deodorization can be reduced, and it can be preferably applied to relatively compact (space-saving) deodorizing products (dispersers). In addition, conventional deodorizing components are water-soluble, which has the problem of being difficult to mix with oil-soluble fragrances and therefore difficult to use in combination. However, as shown in the examples described later, with the deodorizing composition of this disclosure, a uniform mixture can be easily obtained even when a fragrance is added. Moreover, the deodorizing composition of this disclosure has very little effect on the aroma derived from the fragrance and could be used in combination with the fragrance. For this reason, by adding a fragrance to the deodorizing composition of this disclosure, it can be said that the composition is also useful as a deodorizing and fragrance composition.

[0044] Furthermore, as mentioned above, since at least one component selected from the group consisting of components (1) to (11) is useful as a deodorizing component (deodorizing active component), this disclosure can also be said to provide the use of at least one component selected from the group consisting of components (1) to (11) as a deodorizing component (deodorizing active component) in a deodorizing composition. Furthermore, this disclosure can also be said to provide a method of using the component as a deodorizing component, characterized by imparting a deodorizing effect to the composition by incorporating at least one component selected from the group consisting of components (1) to (11) into the composition. Furthermore, this disclosure can also be said to provide a method of using the component as a deodorizing component, in which at least one component selected from the group consisting of components (1) to (11) is incorporated in the manufacture of a deodorizing composition in order to impart a deodorizing effect.

[0045] In the use and method of use, the above description applies to at least one component selected from the group consisting of components (1) to (11), the deodorizing composition, etc., that is, the above description applies to other components that can be incorporated into the deodorizing composition, the amounts of each component, the form of the composition, etc. [Examples]

[0046] The embodiments of this disclosure will be described in more detail below with examples, but the embodiments of this disclosure are not limited to the examples below.

[0047] Test Example 1 (Odor Elimination Evaluation for Acetic Acid) Test Procedure The deodorizing effect on acetic acid, a malodorous component, was evaluated according to the following procedure. In this test, a total of 12 components, as shown in Examples 1 to 11 and Comparative Example 1 described below, were used as samples. The inventors investigated various components and focused on these components.

[0048] 50g of the sample was placed in a glass bottle, and eight polyester sticks (18cm long rods) were inserted into the glass bottle. The bottle was left overnight with the tips of the sticks in contact with the sample inside (with the sample being absorbed).

[0049] Inside a fume hood, a few drops of acetic acid were placed on filter paper resting on a metal cap, and the filter paper, still resting on the metal cap, was placed inside an airbag. Next, odorless air was introduced into the airbag and left for 30 minutes to create the acetic acid masterbatch.

[0050] The glass bottle, left overnight with the stick inserted, was placed inside a newly prepared airbag (10L), and 5L of odorless air was injected. Next, acetic acid was injected into the airbag from the acetic acid masterbatch to a concentration of 100 ppm (approximately 40mL injected) and sealed. 60 minutes after the injection of acetic acid, the concentration of acetic acid inside the airbag was measured using a gas detection tube (product name: Acetic Acid Detection Tube No. 81, manufactured by GASTEC Corporation). The deodorization rate of acetic acid was calculated according to the following formula. Deodorization rate (%) = (Initial value - Measured value) × 100 / Initial value Initial value: 100 (ppm) Measurement value: Value (ppm) 60 minutes after injection of acetic acid.

[0051] [sample] Example 1: (1) Tripropylene glycol methyl ether (trade name Dawanol TPM, manufactured by Dow Chemical Japan Ltd.) Example 2: (2) Tripropylene glycol n-butyl ether (trade name Dawanol TPnB, manufactured by Dow Chemical Japan Ltd.) Example 3: (3) Dipropylene glycol methyl ether (trade name Dawanol DPM, manufactured by Dow Chemical Japan Ltd.) Example 4: (4) Propylene glycol methyl ether acetate (trade name Dawanol PMA, manufactured by Dow Chemical Japan Ltd.) Example 5: (5) Propylene glycol n-butyl ether (trade name Dawanol PnB, manufactured by Dow Chemical Japan Ltd.) Example 6: (6) Propylene glycol phenyl ether (trade name Dawanol PPH, manufactured by Dow Chemical Japan Ltd.) Example 7: (7) 3-Methoxy-3-methyl-1-butanol (product name Solfit, manufactured by Kuraray Co., Ltd.) Example 8: (8) 3-Methoxy-3-methyl-1-butyl acetate (product name Solfit AC, manufactured by Kuraray Co., Ltd.) Example 9: (9) 2,2-dimethyl-1,3-dioxolane-4-methanol (trade name AUGEO CLEAN MULTI, manufactured by Solvay Japan Ltd.) Example 10: (10) 1-Propanol (Trade name 1-Propanol, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) Example 11: (11) N-methyl-2-pyrrolidone (trade name NMP, manufactured by Lyondell) Comparative Example 1: (12) Isoparaffinic hydrocarbon (trade name Isopar G, manufactured by ExxonMobil)

[0052] result The results are shown in Table 1. [Table 1]

[0053] As shown in Table 1, when the isoparaffinic hydrocarbon of Comparative Example 1 was used, the deodorization rate of acetic acid odor was 40%. In contrast, when each component shown in Examples 1 to 11 was used, the deodorization rate of acetic acid odor was 88% or higher, indicating a very high deodorization rate. Comparative Example 1 and each component of Examples 1 to 11 are known to be conventionally usable as solvents (for example, Comparative Example 1 is an isoparaffinic solvent, Examples 1 to 6 are glycol ether solvents, and Examples 7 to 10 are alcohol solvents), but surprisingly, it was found that each component of Examples 1 to 11 produced a remarkable deodorizing effect. From this, it was found that each component of Examples 1 to 11 is useful as an effective deodorizing component in deodorizing acetic acid odor.

[0054] Test Example 2 (Odor Elimination Evaluation for Isovaleric Acid) Test Procedure The deodorizing effect against isovaleric acid (3-methylbutanoic acid), a malodorous component, was evaluated according to the following procedure.

[0055] 50g of the sample was placed in a glass bottle, and eight polyester sticks (18cm long rods) were inserted into the glass bottle. The bottle was left overnight with the tips of the sticks in contact with the sample inside (with the sample being absorbed). In this test example, the components shown in Examples 1, 3-10 and Comparative Example 1 were used as samples.

[0056] Inside a fume hood, a few drops of isovaleric acid were placed on filter paper resting on a metal cap, and the filter paper, still resting on the metal cap, was placed inside an airbag. Next, odorless air was introduced into the airbag and left for 30 minutes to serve as the isovaleric acid masterbatch.

[0057] The glass bottle, left overnight, was placed inside an airbag (10L) with a stick inserted, and 5L of odorless air was injected. Next, isovaleric acid was injected into the airbag from the isovaleric acid masterbatch to a concentration of 20 ppm (approximately 850mL injected) and sealed. 60 minutes after the injection of isovaleric acid, the concentration of isovaleric acid inside the airbag was measured using a gas detection tube (product name: Acetic Acid Detection Tube No. 81L, manufactured by GASTEC Corporation). The deodorization rate of isovaleric acid was calculated according to the following formula. Deodorization rate (%) = (Initial value - Measured value) × 100 / Initial value Initial value: 20 (ppm) Measurement value: Value (ppm) 60 minutes after injection of isovaleric acid.

[0058] result Table 2 shows the results obtained using each component in Examples 1 and 3-10, and the isoparaffinic hydrocarbon in Comparative Example 1.

[0059] [Table 2]

[0060] As shown in Table 2, when the isoparaffinic hydrocarbon of Comparative Example 1 was used, the deodorization rate of isovaleric acid was 46%. In contrast, when the components shown in Examples 1 and 3-10 were used, the deodorization rate of isovaleric acid was 83% or higher, indicating a very high deodorization rate. The components of Comparative Example 1 and Examples 1 and 3-10 are all known to be usable as solvents, but surprisingly, the components of Examples 1 and 3-10 were found to have a remarkable deodorizing effect. From this, it was found that the components of Examples 1 and 3-10 are useful as deodorizing active ingredients in the deodorization of isovaleric acid. Furthermore, since the component shown in Example 2 has a structure very similar to the component shown in Example 1, it was understood from these results that the component of Example 2, like the component of Example 1, can also obtain a high deodorizing effect against isovaleric acid odor.

[0061] These findings confirm that the components of Examples 1-10 exhibit high deodorizing effects even against isovaleric acid odor. Furthermore, these findings indicate that the components of Examples 1-10 are useful as effective deodorizing ingredients in the deodorization of isovaleric acid.

[0062] Test Example 3 (Odor Intensity Evaluation) Test Procedure A filter paper was placed in a plastic petri dish, and 0.5g of each sample shown in Table 3 was dropped onto the center of the filter paper. The petri dish was then covered. After 5 minutes, the cover was removed, and nine expert panelists were asked to directly smell the filter paper (at a distance of 5cm from their noses). The odor intensity of the samples was evaluated according to the following criteria using a 6-level odor intensity scale. The 6-level odor intensity scale is a conventionally known evaluation method used for odor evaluation, and it is a method of evaluation based on a 6-level scale from 0 to 5. In Table 3, the blank value represents the result of smelling only the filter paper (without any sample drops) under the same conditions.

[0063] 0: Odorless 1: The odor that can finally be detected (detection threshold) 2: A weak odor that can be identified (recognition threshold) 3: Easily detectable odors 4: Strong smell 5: Strong smell

[0064] result The results are shown in Table 3. The values ​​in the table represent the average values ​​for all panelists. [Table 3]

[0065] As shown in Table 3, the odor intensity of the blank (filter paper only (Reference Example 1)) was 0. In Reference Example 2, where only water was added as a sample, the odor intensity was 0.07. Both Reference Examples 1 and 2 were considered odorless. The isoparaffinic hydrocarbon in Comparative Example 1 is a component that is conventionally considered to be almost odorless, and its odor intensity was 1.93.

[0066] As shown in Table 3, the odor intensity when using the components of Example 9 was 0.36, which was lower than that of Comparative Example 1. The odor intensities when using the components of Examples 6 and 7 were 2.43 and 2.00, respectively. From these values, it can be said that the odors perceived by humans for the components of Examples 6, 7, and 9 were all at the same level as those for Comparative Example 1. The odor intensity when using the components of Example 1 was 2.79, which is above an odor intensity of 2, indicating that the odor was perceptible but not unpleasant. The odor intensities when using the components of Examples 3 and 8 were 3.86 and 3.71, respectively, which are above an odor intensity of 3, indicating that the odor was easily perceptible, but the odor was not unpleasant when dispersed or sprayed into indoor spaces. The odor intensities when using the components of Examples 4, 5, and 10 were 4.36, 4.00, and 4.21, respectively, and although the odor intensities were even higher, these were also not unpleasant.

[0067] From this, it was found that these components do not produce an unpleasant odor for humans even when dispersed or sprayed into indoor spaces. Furthermore, among these components, those with an odor intensity of 3 or less were found to be particularly useful because their own odor is very low, and they do not interfere with the fragrance derived from other fragrances, even when used in combination with other fragrances.

[0068] Test Example 4 Using Examples 6, 7, and 9, which had an odor intensity of 3 or less in Test Example 3 and therefore had a very low odor of their own, the following tests were conducted to confirm whether they are useful as components that do not interfere with the fragrance of the fragrance even when actually combined with the fragrance. Similarly, using the component from Example 3, which had an odor intensity of 3.86 in Test Example 3, a test was also conducted to determine whether it does not interfere with the fragrance of the fragrance.

[0069] Specifically, filter paper was placed in a plastic petri dish, 0.5g of each sample shown in Table 4 was dropped onto the center of the filter paper, and the petri dish was covered. After 5 minutes, the cover was opened, and nine expert panelists smelled the filter paper directly (at a distance of 5cm from their noses). The pleasantness or unpleasantness of the odor was evaluated according to the following criteria using a 9-point pleasantness / unpleasantness scale. The 9-point pleasantness / unpleasantness scale is a conventionally known evaluation method used to evaluate the quality of odors and is a known method for quantifying the pleasantness or unpleasantness of an odor. In this test example, the pleasantness or unpleasantness of the odor was evaluated on a 9-point scale in 0.5 increments within a range (-2 to 2) where -2 meant unpleasant, -1 meant slightly unpleasant, 0 meant neither pleasant nor unpleasant, 1 meant slightly pleasant, and 2 meant pleasant.

[0070] The samples consisted of either fragrance alone or a mixture of the components shown in Table 4 (Examples 3, 6, 7, and 9) and fragrance (fragrance content in the mixture was 0.05% by mass). The components and fragrances were easily and uniformly mixed. The fragrances used in this test were woody, oriental, and fruity fragrances.

[0071] result The results are shown in Table 4. The values ​​in the table represent the average values ​​for all panelists. [Table 4]

[0072] As shown in Table 4, the values ​​when using only fragrances were 1.07 (woody), 0.93 (oriental), and 1.14 (fruity), respectively. In these cases, the desired aroma derived from each fragrance was obtained. When the component of Example 9, which had the second lowest odor intensity after water in Test Example 3, was combined with a fragrance, the value was 0.86 for all fragrances. This value was slightly lower than that of the fragrance alone, but it was a good aroma without any unpleasant odor compared to the fragrance alone. From this, it was confirmed that the component of Example 9 does not impair the fragrance of the fragrance even when combined with it.

[0073] Furthermore, when the components of Example 7 were combined with fragrances, the values ​​were 0.93, 0.29, and 0.43. Although these values ​​tended to be lower than when using the components of Example 9, even in this case, the pleasant aromas of each fragrance were obtained without causing any unpleasantness compared to using fragrances alone. Also, when the components of Example 6 were combined with fragrances, the values ​​were 0.14, 0.21, and 0.00. Although these values ​​were lower than when using the components of Examples 7 and 9, no unpleasantness was felt, indicating that the components of Example 6 can also be used in combination with fragrances. When the components of Example 3, which had an odor intensity of 3.86 in Test Example 3, were combined with fragrances, the values ​​were -0.18, -0.86, and -0.71, indicating a slight unpleasant odor. From this, it can be said that the components of Example 3 can also be used in combination with fragrances, but the pleasant / unpleasant odor evaluation was superior in Examples 6, 7, and 9.

[0074] These components are all useful for deodorizing acetic acid odor, as well as isovaleric acid, and unlike conventional water-soluble deodorizing components, they do not require dissolution in a solvent, making them easy to use. Furthermore, it was found that they can be used in combination with fragrances. It was also found that components (1) to (11) can be appropriately selected and used depending on the desired fragrance. In addition, components with an odor intensity of 3 or less, such as those in Example 6, had very little effect on pleasantness or unpleasantness, and were therefore found to be particularly desirable for use in combination with fragrances.

Claims

1. A deodorizing composition containing only at least one component selected from the following group as a deodorizing component: Propylene glycol methyl ether acetate, 3-methoxy-3-methyl-1-butyl acetate, 2,2-dimethyl-1,3-dioxolane-4-methanol, and N-methyl-2-pyrrolidone.

2. A deodorizing and fragrance composition containing at least one component selected from the following group as a deodorizing component, and also containing a fragrance: Propylene glycol methyl ether acetate, 3-methoxy-3-methyl-1-butyl acetate, 2,2-dimethyl-1,3-dioxolane-4-methanol, and N-methyl-2-pyrrolidone.

3. The deodorizing and fragrance composition according to claim 2, wherein the deodorizing component is 2,2-dimethyl-1,3-dioxolane-4-methanol.

4. A method of using a component as a deodorizing component, characterized by imparting a deodorizing effect to a composition by incorporating at least one component selected from the group below into the composition: Propylene glycol methyl ether acetate, 3-methoxy-3-methyl-1-butyl acetate, 2,2-dimethyl-1,3-dioxolane-4-methanol, and N-methyl-2-pyrrolidone.

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