JP7764645B2 - Expandable compressed product and method for prolonging the fragrance of a fragrance - Google Patents

Description

The present invention relates to an expandable compression molded product and a method for prolonging the scent of a fragrance.

In recent years, it has become common to add bath additives to bathwater to give it a refreshing fragrance or color, to stimulate metabolism and improve sensitivity to cold, and to obtain a warming effect. Various types of bath additives are sold, including bath salts, tablets, and liquids. Among these, bath additives containing a carbon dioxide gas generator, a combination of carbonate and acid, generate carbon dioxide gas in the bathwater. The carbon dioxide dissolved in the bathwater dilates capillaries and boosts metabolism, and is expected to have effects such as promoting blood circulation and relieving fatigue.

Furthermore, one of the important effects expected from bath additives is the aromatherapy effect of the scent, and maintaining a stable scent is important to enhance this effect while bathing. Therefore, Patent Document 1 reports a technology for enhancing the fragrance of bath additives by making them into granular bath additives with small particle diameters and large surface areas.

JP 2009-062319 A

Until now, foaming bath additives combining carbonates and acids have been popular, compressed into solid tablets or other forms that sink into the bathwater, making it easier for the generated carbon dioxide gas to dissolve in the bathwater. However, because these bath additives sink in the bathwater, they do not release as much fragrance as granular bath additives. On the other hand, adding a large amount of fragrance to compressed solid bath additives in order to improve the release of the fragrance can potentially reduce the stability of the formulation.

Another issue with compressed solid bath additives is that while the scent is easily detectable immediately after dissolving, the scent does not last. In particular, users who dissolve the additive in bathwater can easily detect the scent, but those who take a subsequent bath find it difficult to detect.

The present invention aims to provide an expandable compression-molded product that has good fragrance release and long-lasting fragrance, and to provide a method for maintaining the fragrance of an expandable compression-molded product. In this invention, "fragrance release" means that the fragrance diffuses and can be felt immediately after the expandable compression-molded product is dissolved in water or the like.

The present invention is as follows.
(1) Contains a fragrance having a vapor pressure of 0.00002 to 120 mmHg at 25°C,
The surface area is 8000 mm ² or more,
The mass is 80 to 100 g,
An expandable compression-molded product having a ratio of maximum diameter (mm) to mass (g) [maximum diameter (mm)/mass (g)] of 0.65 or more.
(2) Contains an organic acid;
The expandable compression-molded product according to (1), wherein the content of the organic acid is 10 to 55% by mass.
(3) The expandable compression-molded product according to (1) or (2), which contains a carbonate, and the content of the carbonate is 20 to 90 mass %.
(4) The expandable compression-molded product according to any one of (1) to (3), having a maximum foaming force of 6 mL/s or more and 13 mL/s or less.
(5) A method for sustaining the scent of a fragrance by using a foamable compression-molded product containing a fragrance, comprising:
The expandable compression-molded product is
Contains a fragrance having a vapor pressure of 0.00002 to 120 mmHg at 25°C,
The surface area is 8000 mm ² or more,
The mass is 80 to 100 g,
A method in which the ratio of maximum diameter (mm) to mass (g) [maximum diameter (mm)/mass (g)] is 0.65 or more.

The present invention provides a foamable compression-molded product that has a good fragrance and long-lasting fragrance, and also enables the fragrance of the foamable compression-molded product to last.

FIG. 1 is a graph showing the change over time in fragrance intensity of the expandable compression-molded products of Examples 1 and 2 and Comparative Example 1. FIG. 2 is a graph showing the change over time in the fragrance intensity of the expandable compression-molded products of Examples 3 to 5. FIG. 3 is a graph showing the change over time in the foaming power of the expandable compression-molded products of Examples 1 to 5 and Comparative Example 1. FIG. 4 is a graph showing the change over time in fragrance intensity of the expandable compression molded products of Examples 6 to 9 and Comparative Example 2. FIG. 5 is a graph showing the change over time in fragrance intensity of the expandable compression-molded products of Example 10 and Reference Examples 1 and 2. FIG. 6 is a graph showing the change over time in the foaming power of the expandable compression-molded products of Example 10 and Reference Examples 1 and 2.

The expandable compression-molded product according to an embodiment of the present invention will be described in detail below.

[Expandable compression molded product]
The expandable compression molded product of this embodiment contains a fragrance and has a maximum diameter of 65 mm or more and a surface area of 8,000 ^mm2 or more. This configuration of the expandable compression molded product of this embodiment allows for good fragrance release and increased fragrance persistence. The reasons for this are presumably that the maximum foaming power can be increased, which intensifies the foaming momentum, making it easier for the fragrance to diffuse throughout the space, allowing the fragrance to adhere to the inner wall of the bathtub and facilitate continuous release of the fragrance, and also facilitating the volatilization of base note fragrances with low vapor pressure.

The shape of the expandable compression-molded product of this embodiment is not particularly limited, and examples include columnar, block, spherical, hemispherical, and polygonal shapes. Examples of columnar shapes include cylindrical and polygonal columns.

The maximum diameter of the expandable compression molded product of this embodiment is 65 mm or more, which can increase the persistence of the fragrance. Furthermore, the maximum diameter is preferably 75 mm or less, as this can prevent the tablets from cracking or chipping during line transport or transportation. Note that the maximum diameter refers to the diameter of the circumscribed circle when viewed axially in the case of a cylindrical expandable compression molded product; in the case of a spherical or hemispherical shape, it refers to the maximum diameter of the sphere; and in the case of a block or polygonal shape, it refers to the length of the longest side.

The surface area of the expandable compression-molded product of this embodiment is 8000 ^mm2 or more, which can increase the persistence of the fragrance. The surface area is preferably 9000 ^mm2 or more, and is preferably 13000 mm2 ^or less in order to prevent cracking or chipping of the tablets during conveyance on the line or during transportation.
In this specification, the surface area of a foamable compression molded product means the sum of all surfaces of a solid. For example, the surface area of a columnar foamable compression molded product means the sum of the areas of the top surface (top surface), bottom surface, and side surface. The surface area of a foamable compression molded product can be calculated by calculating the area of each surface of the solid and adding them up, or by scanning the foamable compression molded product with a 3D scanner. The 3D scanner is not particularly limited as long as it is an instrument that has the function of calculating the surface area, but for example, a 3D scanner type three-dimensional measuring machine VL-500 (manufactured by KEYENCE) or the like can be used.
In addition, in order to simultaneously satisfy the above requirements of maximum diameter and surface area, for example, the tableting pressure, the mass of the expandable compression-molded product, the particle size of the raw material, etc. may be adjusted, and the surface of the expandable compression-molded product, for example, at least one of the top and bottom surfaces, may have an uneven shape.

The expandable compression-molded product of this embodiment preferably has a mass of 80 g or more, more preferably 90 g or more. A mass of 80 g or more increases the amount of carbon dioxide gas that effervesces, improving the release and persistence of the fragrance. There is no particular upper limit to the mass, but it is typically 100 g or less.

The expandable compression molded product of this embodiment preferably has a ratio of maximum diameter (mm) to mass (g) [maximum diameter (mm)/mass (g)] of 0.65 or more. A sufficiently large diameter to mass ratio of 0.65 or more can increase foaming power and enhance fragrance persistence. Maximum diameter (mm)/mass (g) is more preferably 0.7 or more. The upper limit of maximum diameter (mm)/mass (g) is preferably 0.9 or less. By keeping the ratio within the above range, the expandable compression molded product can maintain high hardness and diffuse and sustain a fragrance.

The expandable compression-molded product of this embodiment has a ratio of maximum diameter (mm) to thickness (mm) [maximum diameter (mm)/thickness (mm)] of preferably 3 or more, more preferably 3.5 or more, and particularly preferably 4 or more. A maximum diameter (mm)/thickness (mm) ratio of 3 or more can enhance the persistence of the fragrance. Furthermore, from the perspective of further enhancing the persistence of the fragrance, maximum diameter (mm)/thickness (mm) is preferably 5 or less, more preferably 4.5 or less.

From the viewpoint of fragrance sustainability, the expandable compression molded product of this embodiment preferably has a thickness of 13 mm or more, more preferably 16 mm or more, and preferably 20 mm or less, more preferably 17.5 mm or less.

From the viewpoint of moldability, the expandable compression molded product of the present embodiment has a density of preferably 1.3 g/ ^cm3 or more, more preferably 1.6 g/cm3 or ^more , and preferably 2.5 g/cm3 or ^less , more preferably 2.0 g/cm3 or ^less .

The expandable compression-molded product of this embodiment has an expansion volume of preferably 700 mL or more, more preferably 800 mL or more, and particularly preferably 1300 mL or more. An expansion volume of 700 mL or more can enhance the release of fragrance. The upper limit is preferably 2000 mL or less, more preferably 1400 mL or less. An expansion volume of 2000 mL or less can suppress cracking or chipping of tablets during line conveyance or transportation, and the stability of the formulation is also good.
The foaming amount can be determined, for example, by placing one tablet of the foamable compression-molded product in a metal mesh basket (diameter 10 cm x height 10 cm), immersing this in 200 L of bath water at 40°C, placing an upside-down funnel just above the top surface of the metal mesh basket in the water, and collecting all of the generated carbon dioxide gas in a measuring cylinder, and measuring the amount of carbon dioxide gas generated.
In order to achieve a desired foaming amount, for example, the types and contents of the organic acid and carbonate may be adjusted.

The foaming time of the expandable compression molded product of this embodiment is preferably 3 minutes or more, more preferably 4 minutes or more. A foaming time of 3 minutes or more allows for sufficient foaming and good fragrance release. The upper limit of the foaming time is preferably 6 minutes or less, more preferably 5 minutes or less. A foaming time of 6 minutes or less provides good fragrance persistence. By setting the foaming time within the above range, it is possible to increase the fragrance persistence while ensuring a satisfactorily strong fragrance release immediately after dissolving the expandable compression molded product. In addition, the carbon dioxide concentration in the bathwater can be efficiently increased.
The foaming time can be calculated, for example, from the time from when one tablet of the foamable compression-molded product is put into the bath water to when the generation of carbon dioxide gas is completed in the measurement of the foaming amount.
In order to achieve the desired foaming time, for example, the formulation, shape, molding conditions, etc. of the expandable compression-molded product can be adjusted. Specifically, as described above, examples include adjusting the type and content of the organic acid and carbonate, setting the maximum diameter and surface area of the expandable compression-molded product within a specific range, setting the ratio of the maximum diameter to the mass of the expandable compression-molded product within a specific range, or setting the ratio of the maximum diameter to the thickness of the expandable compression-molded product within a specific range. Another example is adjusting the pressure of the tablet press used for molding.

The foamable compression molded product of this embodiment has a foaming power of preferably 3 mL/s or more, more preferably 4 mL/s or more. A foaming power of 3 mL/s or more ensures good fragrance persistence. The upper limit of the foaming power is preferably 6 mL/s or less, more preferably 5 mL/s or less. A foaming power of 6 mL/s or less can prevent choking caused by powder in the foamable compression molded product flying up due to foaming.
The foaming power is calculated by the following formula.
[Calculation formula]
Foaming power (mL/s) = foaming amount (mL) ÷ foaming time of foamable compression molded product (s)
In order to obtain the desired foaming power, for example, the foaming amount and foaming time of the expandable compression molded product may be adjusted as described above.

The expandable compression molded product of this embodiment has a maximum foaming power of preferably 6 mL/s or more, more preferably 10 mL/s or more. A maximum foaming power of 6 mL/s or more provides good fragrance release and fragrance persistence. The upper limit of the maximum foaming power is preferably 13 mL/s or less, more preferably 11 mL/s or less. A maximum foaming power of 13 mL/s or less can suppress choking caused by powder in the expandable compression molded product flying up due to foaming.
The maximum foaming power is calculated from the foaming amount every 20 seconds based on the following formula, and the maximum value is taken as the maximum foaming power.
[Calculation formula]
Foaming power per unit time (mL/s) = [foaming amount after X seconds (mL) - foaming amount 20 seconds before X seconds (mL)] / 20 (s)
In order to obtain the desired maximum foaming power, for example, the foaming amount and foaming time of the expandable compression molded product may be adjusted as described above.

Next, we will explain each of the ingredients in the expandable compression-molded product of this embodiment.

(fragrance)
Flavorings include natural flavorings extracted from various plants and animals, synthetic flavorings that are chemically synthesized, and compound flavorings made by mixing a number of these flavoring ingredients.
Fragrances can be found in various literature, for example, "Perfume and Flavor Materials of Natural Origin", Steffen Arctander, Allured Pub. Co. (1960), "Encyclopedia of Fragrances", edited by the Japan Fragrance Association, Asakura Shoten (1989), "Flower oils and Floral Compounds in Perfumery", Danute Pajaujis Anonis, Allured Pub. Co. (1993), "Perfume and Flavor Chemicals (aroma chemicals)", Vols. I and II, Steffen Arctander, Allured Pub. Co. (1994), "Fundamentals of Fragrance and Fragrance Blending," edited by Nakajima Mototaka, Sangyo Tosho (1995), "Synthetic Fragrances: Chemistry and Product Knowledge," written by Indo Genichi, Kagaku Kogyo Nipposha (1996), and "Encyclopedia of Fragrances," edited by Yatagai Mitsukatsu, Maruzen (2005) can be used. Each of these is incorporated by reference into the disclosure of this specification. Representative examples of fragrances are specifically listed below, but are not limited to these.

Examples of natural fragrances include natural essential oils such as orange oil, lemon oil, lavender oil, lavandin oil, bergamot oil, patchouli oil, cedarwood oil, and peppermint oil.
Examples of synthetic fragrances include hydrocarbon terpenes such as α-pinene, β-pinene, limonene, p-cymene, terpinolene, α-terpinene, γ-terpinene, α-phellandrene, myrcene, camphene, and ocimene; heptanal, octanal, decanal, benzaldehyde, salicylic aldehyde, phenylacetaldehyde, citronellal, hydroxycitronellal, and hydrotropic aldehyde. Aldehydes such as cinnamic aldehyde, ligustral, citral, α-hexyl cinnamic aldehyde, α-amyl cinnamic aldehyde, lilial, cyclamen aldehyde, lyral, heliotropin, anisaldehyde, helional, vanillin, and ethyl vanillin; ethyl formate, methyl acetate, ethyl acetate, methyl propionate, methyl isobutyrate, and ethyl isobutyrate; Ethyl butyrate, propyl butyrate, isobutyl acetate, isobutyl isobutyrate, isobutyl butyrate, isobutyl isovalerate, ethyl 2-methylvalerate, isoamyl acetate, terpinyl acetate, isoamyl propionate, amyl propionate, amyl isobutyrate, amyl butyrate, amyl isovalerate, allyl hexanoate, ethyl acetoacetate, ethyl heptylate, heptyl acetate, methyl benzoate, ethyl benzoate, ethyl octylate, styrallyl acetate, benzyl acetate, nonyl acetate, bornyl acetate, linalyl acetate, ortho-tert-butylcyclohexyl acetate, linalyl benzoate, benzyl benzoate, triethyl citrate, ethyl cinnamate, methyl salicylate, hexyl salicylate Esters and lactones such as methyl jasmonate, methyl dihydrojasmonate, ethylene brassylate, γ-undecalactone, γ-nonyl lactone, cyclopentadecanolide, and coumarin; ethers such as anisole, p-cresyl methyl ether, dimethylhydroquinone, methyl eugenol, β-naphthol methyl ether, β-naphthol ethyl ether, anethole, diphenyl oxide, rose oxide, galaxolide, and ambrox; isopropyl alcohol, cis-3-hexenol, heptanol, 2-octanol, dimetol, dihydromyrcenol, linalool, benzyl alcohol, citronellol, and geraniol. alcohols such as nerol, terpineol, tetrahydrogeraniol, l-menthol, cedrol, santalol, thymol, anise alcohol, phenylethyl alcohol, and hexanol; ketones such as diacetyl, menthone, isomenthone, thiomenthone, acetophenone, α- or β-damascone, α- or β-damascenone, α-, β-, or γ-ionone, α-, β-, or γ-methylionone, methyl-β-naphthyl ketone, benzophenone, tentalome, acetyl cedrene, α- or β-isomethylionone, α-, β-, or γ-irone, maltol, ethyl maltol, cis-jasmone, dihydrojasmone, l-carvone, dihydrocarvone, and methyl amyl ketone; camphor, 1,8-cineole, allyl amyl glycolate, isopulegol, and allyl caproate. These fragrances may be used alone or in any combination of two or more to form a blended fragrance.Furthermore, the fragrance may be used as a mixture (fragrance composition) containing fragrance ingredients, solvents, fragrance stabilizers, etc.

Solvents for fragrances include, for example, water, alcohols such as ethanol, propanol, and benzyl alcohol, polyhydric alcohols such as ethylene glycol, diethylene glycol, dipropylene glycol, glycerin, and 1,3-butanediol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monopropyl ether, diethylene glycol monobutyl ether, diethylene glycol monoisobutyl ether, triethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol dimethyl ether, and dipropylene glycol. Examples of suitable solvents include glycol ethers such as glycol monomethyl ether, tripropylene glycol monomethyl ether, tripropylene glycol monobutyl ether, propylene glycol monopropyl ether, dipropylene glycol monopropyl ether, propylene glycol monobutyl ether, propylene glycol tert-butyl ether, dipropylene glycol monobutyl ether, dipropylene glycol dimethyl ether, phenyl carbitol, phenyl cellosolve, and benzyl carbitol; paraffins such as liquid paraffin and n-paraffin; esters such as diethyl phthalate, benzyl benzoate, triethyl citrate, and isopropyl myristate; and others such as 3-methyl-4-methoxybutanol, N-methylpyrrolidone, and propylene carbonate. These solvents can be used alone or in any combination of two or more. They can also be mixed with the above-mentioned fragrance components to form a fragrance composition.

The expandable compression molded product of this embodiment preferably contains a fragrance component with a vapor pressure at 25°C (hereinafter sometimes simply referred to as vapor pressure) of 0.00002 to 120 mmHg, more preferably 0.001 to 120 mmHg, and even more preferably 0.1 to 120 mmHg. If the vapor pressure of the fragrance component is within this range, it will easily volatilize from bath water, etc., resulting in good fragrance release, which is preferable.

The expandable compression molded product of this embodiment has a high maximum foaming power, i.e., a strong foaming force, and is therefore thought to easily volatilize even base note (last note) fragrance components, which have a low vapor pressure. The ease of volatilization of base note fragrance components, which have the longest lasting effects among fragrance components, is thought to enhance the persistence of the fragrance of the expandable compression molded product. The vapor pressure of base note fragrance components is preferably approximately 0.00002 to 0.01 mmHg. The effects of the invention are particularly noticeable with fragrances that contain a high proportion of base note fragrance components, as this improves the fragrance's release and long-lasting fragrance.

Examples of fragrance components having a vapor pressure of 0.00002 to 120 mmHg include limonene, pinene, myrcene, camphene, geraniol, citronellol, linalool, linalyl acetate, phenethyl acetate, isobornyl acetate, isoamyl acetate, amyl acetate, ethyl butyrate, ethyl vanillin, α-hexyl cinnamic aldehyde, ethyl acetate, tonalide, nerol, hexyl acetate, cineole, decanal, eugenol, borneol, indole, cresol, benzyl benzoate, butyl acetate, terpineol, γ-decalactone, δ Examples of suitable aromatic compounds include α-decalactone, γ-dodecalactone, δ-dodecalactone, allylheptanoate, styrallyl acetate, citral, galaxolide, methyl dihydrojasmonate, isocyclocitral, bornyl acetate, butylcyclohexyl acetate, triethyl citrate, vanillin, menthone, ambellone, and 2-ethyl-4-(2,2,3-trimethyl-3-cyclopentenyl)-2-buten-1-ol. These compounds may be used alone or in combination of two or more, and may also be used in combination with a fragrance component having a vapor pressure outside the above range.
Examples of fragrance components having a vapor pressure of 0.00002 to 0.01 mmHg include ethyl vanillin, α-hexyl cinnamic aldehyde, tonalide, benzyl benzoate, γ-decalactone, δ-decalactone, γ-dodecalactone, δ-dodecalactone, galaxolide, methyl dihydrojasmonate, triethyl citrate, ambellone, and 2-ethyl-4-(2,2,3-trimethyl-3-cyclopentenyl)-2-buten-1-ol.

The vapor pressure of the above fragrance ingredients at 25°C is shown in Table 1 below.

Fragrance ingredients that are less soluble in water are preferable because this increases the persistence of the fragrance. If the fragrance ingredient is not easily soluble in water (bath water), when the bubbles pop near the water surface, the fragrance ingredient present around the bubbles will diffuse into the air, increasing the intensity of the fragrance.
From the viewpoint of fragrance persistence, the solubility of the fragrance component in water is preferably 100 mg/mL or less, more preferably 20 mg/mL or less, and even more preferably 2 mg/mL or less, and is preferably 0.000001 mg/mL or more, more preferably 0.001 mg/mL or more, and even more preferably 0.005 mg/mL or more.
The solubility of a fragrance component in water is an index showing how much of the fragrance component dissolves in water, and is expressed in mg as the mass of the fragrance component that dissolves in 1 mL of water at 25°C.
Among the fragrance ingredients listed above, ingredients with a solubility in water of 20 mg/mL or less include cineole (0.3321 mg/mL), limonene (0.00757 mg/mL), menthone (0.688 mg/mL), linalool (1.59 mg/mL), citral (0.59 mg/mL), terpineol (7.1 mg/mL), hexyl acetate (0.511 mg/mL), citronellol (0.2 mg/mL), nerol (0.531 mg/mL), geraniol (0.1 mg/mL), eugenol (2.46 mg/mL), vanillin (11.02 mg/mL), ethyl vanillin (2.822 mg/mL), galaxolide (0.00175 mg/mL), benzyl benzoate (0.0154 mg/mL), and butyl cyclohexyl acetate (0.003552 mg/mL).

The expandable compression molded product of this embodiment preferably contains 0.1 to 2% by mass of the fragrance, and more preferably 0.3 to 1% by mass. By containing the fragrance within this range, the expandable compression molded product has good shape retention and is able to easily diffuse the fragrance.

(organic acid)
The expandable compression-molded product of the present embodiment preferably contains a component that generates carbon dioxide gas, such as a carbonate and an organic acid. Carbon dioxide gas can be generated by the reaction between the carbonate and the organic acid.

Examples of organic acids include succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid, benzoic acid, citric acid, and salicylic acid. From the standpoint of ease of handling and economy, succinic acid, fumaric acid, and tartaric acid are preferred. These organic acids can be used alone or in appropriate combinations of two or more.

Furthermore, the particle size (average particle size d50) of the organic acid is preferably 0.03 to 1 mm, and more preferably 0.05 to 0.5 mm. When the particle size of the organic acid is within this range, it is less likely to remain undissolved in the liquid, and it foams efficiently, diffusing the fragrance of the fragrance, which is preferable.

If the particle size is larger than the above, it is preferable to crush it in advance to the appropriate particle size. Crushers that can be used for crushing include impact crushers such as hammer crushers, atomizers, impact crushers such as pin mills, and shear crushers such as flash mills. These can be used in a single-stage operation, or in a multi-stage operation using the same or different types of crushers.

The organic acid content in 100% by mass of the expandable compression molded product is preferably 10 to 55% by mass. If the organic acid content is 10% by mass or more, sufficient carbon dioxide gas can be generated when it reacts with carbonate to generate carbon dioxide gas. The organic acid content is more preferably 15% by mass or more, and even more preferably 20% by mass or more. It is also preferably 55% by mass or less, more preferably 40% by mass or less, and even more preferably 30% by mass or less. Within the above range, the organic acid is less likely to remain undissolved in the liquid, foams efficiently, and can diffuse the fragrance of the fragrance.

(carbonate)
The carbonate may be any that reacts with an organic acid in a liquid to generate carbon dioxide gas, and examples thereof include sodium carbonate, sodium bicarbonate, sodium sesquicarbonate, calcium carbonate, potassium carbonate, magnesium carbonate, etc. One or more of these may be used. Among these, it is more preferable to use sodium carbonate and sodium bicarbonate.

The carbonate content in 100% by mass of the expandable compression molded product is preferably 20 to 90% by mass. If the carbonate content is 20% by mass or more, sufficient carbon dioxide gas can be generated when reacting with an organic acid to generate carbon dioxide gas. The carbonate content is more preferably 30% by mass or more, and even more preferably 40% by mass or more. The carbonate content is also preferably 80% by mass or less, more preferably 75% by mass or less, and even more preferably 65% by mass or less. Within the above ranges, the amount of foaming per unit time can be increased, resulting in vigorous foaming and improved fragrance release.

The particle size (average particle size d50) of the carbonate is preferably 0.03 to 1 mm, and more preferably 0.05 to 0.5 mm. Within this range, the expandable compression molded product will have an appropriate hardness and will maintain its expansion time.

(Other ingredients)
The expandable compression-molded product used in the embodiment of the present invention may contain other components as appropriate, even if they are not the components described above, as long as the problem of the present invention can be solved. Examples of other components include inorganic salts, sugars, lubricants, opacifiers, binders, humectants, surfactants, enzymes, colorants, pigments/minerals, vitamins and their derivatives, anti-fading agents, pH adjusters, and disinfectants. The uses of these other components may overlap.

Inorganic salts include any optional components other than the carbonates listed above, such as chlorides such as sodium chloride, potassium chloride, and ammonium chloride; sulfates such as sodium sulfate, aluminum sulfate, iron sulfate, aluminum potassium sulfate, sodium thiosulfate, calcium thiosulfate, potassium thiosulfate, and sodium hyposulfite; nitrates such as sodium nitrate, potassium nitrate, and calcium nitrate; phosphates such as sodium phosphate, sodium polyphosphate, and calcium hydrogen phosphate; silicates such as calcium silicate and magnesium silicate; sulfides such as sulfur, calcium sulfide, sodium sulfide, potassium sulfide, ammonium sulfide, barium sulfide, zinc sulfide, tin sulfide, antimony sulfide, iron sulfide, and phosphorus sulfide; silicon compounds such as metasilicic acid, mica powder, and neutral clay; hydroxides such as sodium hydroxide and calcium hydroxide; borax, boric acid, calcium oxide, potassium bromide, potassium permanganate, artificial callus salt, mineral springs, mineral sand, and hot spring deposits. These inorganic salts can also be included as bulk adjusters, formulation aids, and formulation stabilizers.

The content of inorganic salts in 100% by mass of the expandable compression-molded product is preferably 2.5% by mass or more, more preferably 5% by mass or more, and even more preferably 10% by mass or more. It is also preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less. By staying within the above range, the expandable compression-molded product will have excellent shape retention and good solubility.

Examples of sugars include glucose, fructose, lactose, maltose, sucrose, maltodextrin, cyclodextrin, maltose, fructose, and trehalose.
The content of sugars in 100% by mass of the expandable compression-molded product of this embodiment is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and even more preferably 0.5% by mass or more, and is preferably 15% by mass or less, more preferably 10% by mass or less, and even more preferably 3% by mass or less. By being within the above range, the expandable compression-molded product can have excellent shape retention and good solubility.

Examples of lubricants include talc, kaolin, magnesium stearate, calcium stearate, stearic acid, calcium silicate, anhydrous silicic acid, light anhydrous silicic acid, sucrose fatty acid esters, and silicone oil, with sucrose fatty acid esters and magnesium stearate being preferred. The foaming time of the expandable compression-molded product of this embodiment can be adjusted by blending a lubricant. For example, the foaming time can be extended by increasing the blending amount of lubricant. The lubricant is preferably contained in an amount of 0.001 to 1% by mass, and more preferably 0.01 to 0.5% by mass, relative to 100% by mass of the expandable compression-molded product. By incorporating the lubricant in the above range, fluidity can be improved when the raw materials are mixed.

Examples of opacifying agents include titanium oxide.

Examples of binders include polyalkylene glycol, polyvinylpyrrolidone, and dextrin, with polyalkylene glycol being preferred.
The molecular weight of the polyalkylene glycol is preferably 100 to 20,000, more preferably 400 to 15,000, and even more preferably 2,000 to 10,000. Specifically, polyethylene glycol, polypropylene glycol, etc. are used, with polyethylene glycol being particularly preferred. Also, various polyalkylene glycols can be used alone or in combination. The inclusion of a binder allows the foaming time of the expandable compression-molded product to be adjusted. For example, the foaming time can be extended by increasing the amount of binder added.

Moisturizing agents include, for example, ceramides such as ceramide, ceramide derivatives, and ceramide analogues; organic acid salts such as sodium lactate, disodium tartrate, sodium pyrrolidonecarboxylate, and disodium glutamate; mucopolysaccharides such as chondroitin sulfate and hyaluronic acid; plant collagen obtained from soybeans, corn, carrots, etc.; marine collagen obtained from salmon, pufferfish, tuna, flounder, etc.; fatty acid esters such as isopropyl myristate and isopropyl palmitate, shea butter, squalane, placenta, arbutin, casein, silk, honey, jojoba oil, ginger extract, pueraria root extract, and cationized cellulose.

Examples of surfactants include nonionic surfactants such as polyoxyethylene alkyl ethers, polyoxyethylene hydrogenated castor oil, polyoxyethylene polyoxypropylene copolymers, polyoxyethylene fatty acid esters, and sorbitan fatty acid esters; anionic surfactants such as fatty acid esters such as soap bases, sodium α-olefin sulfonate, sodium alkyl glucoside sulfate, sodium lauryl sulfate, polyoxyethylene sodium lauryl sulfate, and sodium coconut oil fatty acid methyl taurate; amphoteric surfactants such as alkyl betaines, alkylamidopropyl betaines, alkylamido sulfobetaines, and 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaines; and cationic surfactants such as alkylamine salts and quaternary ammonium salts.

Enzymes include, for example, trypsin, α-chymotrypsin, bromelain, papain, protease, proctase, serratiopeptidase, lysozyme, pepsin, and ficin.

Examples of pigments include legal pigments such as Blue No. 1, Blue No. 2, Red No. 102, Red No. 106, Red No. 227, Red No. 230 (1), Yellow No. 4, Yellow No. 5, Yellow No. 202 (1), Green No. 3, Green No. 201, Green No. 204, and Orange No. 205, as well as chlorophyll, riboflavin, annatto, anthocyanins, etc.

Examples of pigments and minerals include clay, red iron oxide, yellow iron oxide, mica, zinc oxide, bentonite, zeolite, metasilicic acid, acid clay, and coated particles (granules) of these. These can also be included as formulation aids.

Examples of vitamins and their derivatives include vitamin A, vitamin B, vitamin C, vitamin D, vitamin E, vitamin F, vitamin H, pantothenic acid, nicotinic acid or its derivatives, vitamin E nicotinate, tocopherol acetate, sodium ascorbate, etc.

Examples of anti-fading agents include amino acids such as glycine, alanine, and glutamic acid, and their salts.

Examples of pH adjusters include disodium hydrogen phosphate, trisodium phosphate, disodium hydrogen citrate, and trisodium citrate.

Examples of disinfectants include isopropylmethylphenol, triclosan, dichloroisocyanuric acid, silver zeolite, cetylpyridinium chloride, benzalkonium chloride, benzothonium chloride, chlorhexidine, hinokitiol, phenol, glycyrrhizinate and its derivatives, etc.

(Method for producing expandable compression molded product)
The expandable compression molded product of this embodiment can be produced by mixing the above components and compression molding. When compressing, the method is not particularly limited as long as it can produce an expandable compression molded product, for example, a tablet, and a well-known tablet press can be used.
A tablet press is a device that fills a die with a powder mixture and compresses it between a lower punch and an upper punch to form a tablet. There are single-punch tablet presses, in which a pair of upper and lower punches move up and down inside a single die to compress the mixture, and rotary tablet presses, in which dies are embedded at equal intervals around the periphery of a horizontally rotating turntable, and a series of operations - filling, compression, and ejection - are carried out continuously as the turntable rotates.

When using a tablet press, the size, thickness and shape of the tablet are preferably adjusted to the maximum diameter, thickness and shape of the expandable compression-molded product of this embodiment described above.
At least one of the upper punch and the lower punch may have an uneven shape, whereby the top surface or the bottom surface of the expandable compression-molded product has an uneven shape that is the inverse of the shape of the punch, making it easier for the expandable compression-molded product of this embodiment to fill the desired surface area.

From the viewpoint of moldability, the tableting pressure when using a tablet press is preferably 10 to 30 t, and more preferably 13 to 25 t. Tableting at a tableting pressure of 10 t or more prevents the tablets from becoming brittle and makes them less likely to crack or chip during line conveyance or transport. Furthermore, a tableting pressure of 30 t or less makes it less likely for capping to occur and makes it less likely for tablets to chip during line conveyance or transport.
Furthermore, the size, thickness and density of the tablets can be adjusted by changing the tableting pressure.

The compression molding method should not be limited, and production can be carried out using direct powder compression (direct compression) or granule compression (indirect compression). The order and method of mixing the components can be selected as appropriate.

The expandable compression molded product of this embodiment has a good fragrance and can enhance the fragrance's long-lasting properties, so by using the expandable compression molded product of this embodiment, the fragrance of the perfume can be maintained for a long time.

Applications of the foamable compression molded product of this embodiment include, for example, bath additives, air fresheners, deodorizers, foaming cleaners such as denture cleaners, flush toilet cleaners, and drain cleaners, foaming confectionery, and head spa applications, with bath additives being preferred.

Based on the above, the present specification discloses the following:
[1] Contains a fragrance,
A foamable compression-molded product having a maximum diameter of 65 mm or more and a surface area of 8000 ^mm2 or more.
[2] The expandable compression molded product according to [1], having a foaming power of 3 mL/s or more.
[3] The expandable compression-molded product according to [1] or [2], having a maximum foaming force of 6 mL/s or more.
[4] The expandable compression molded product according to [1] or [2], wherein the ratio of the maximum diameter (mm) to the mass (g) [maximum diameter (mm) / mass (g)] is 0.65 or more.
[5] A method for sustaining the scent of a fragrance using an expandable compression-molded product containing a fragrance and having a maximum diameter of 65 mm or more and a surface area of 8000 ^mm2 or more.

The present invention will be explained in more detail below using examples, but the present invention is not limited to these.

[Examples 1 and 2, Comparative Example 1]
The components were uniformly mixed to prepare a powder mixture according to the composition shown in Table 2. This powder mixture was compression-molded using a single-punch tablet press to produce cylindrical foamable compression-molded bath additives (80 g/tablet) with the diameter, surface area, and thickness shown in Table 4. The tableting pressure was adjusted as shown in Table 4 so that the density of each compression-molded product was approximately 1.7 g/ ^cm3 . An upper punch with a circular convexity in the center was used to create a circular depression on the upper surface.
The surface area of the compression molded product was calculated by calculating the area of each surface from the 3D data of the compression molded product and adding them up.

Examples 3 to 5
The components were uniformly mixed according to the composition shown in Table 2 to prepare a powder mixture. This powder mixture was compression-molded using a single-punch tablet press to produce cylindrical foamable compression-molded bath additives (100 g/tablet) with the diameter, surface area, and thickness shown in Table 4. The tableting pressure was adjusted as shown in Table 4 so that the density of each compression-molded product was approximately 1.7 g/ ^cm3 . An upper punch with a circular convexity in the center was used to create a circular depression on the upper surface.
The surface area of the compression molded product was calculated by calculating the area of each surface from the 3D data of the compression molded product and adding them up.

<Fragrance intensity evaluation>
The bath additives of Examples 1 to 5 and Comparative Example 1 were evaluated for fragrance intensity under the following conditions.
In a bathroom with an enclosed space of 3.74 ^m3 (1.6 m (length) x 1.2 m (width) x 1.95 m (height)), 200 L of hot water (40°C) was poured into the bathtub and one bath additive tablet was added. After that, eight expert panelists evaluated the fragrance intensity in the bathroom immediately after the entire amount of the bath additive had dissolved, and then 30 minutes and one hour later. The bathroom remained sealed until the end of the test except when checking the fragrance.
The evaluation criteria are as follows:
[Evaluation criteria]
2 points: Almost no weakening immediately after dissolution 1 point: Slight weakening immediately after dissolution 0 point: Significant weakening immediately after dissolution The average of the evaluation results of each panelist was calculated. The evaluation criteria are as follows:
◎: 2 to 1.5
◯: 1 or more and less than 1.5 ×: less than 1 The results are shown in Table 4 and Figures 1 and 2.

<Evaluation of foaming power and maximum foaming power>
A bathtub (0.68 m (length) x 1.1 m (width) x 0.46 m (height)) was filled with 200 L of hot water (40°C), and a cylindrical metal mesh basket (10 cm diameter x 10 cm height) containing one bath additive tablet was placed in it. A funnel was placed upside down just above the top of the metal mesh basket in the water to induce the gas (carbon dioxide) generated from the bath additive. The gas was collected in a measuring cylinder, and the amount of foam (mL) produced every 20 seconds was measured. The results are shown in Table 3.

From the measurement results, the foaming power per unit time was calculated from the foam volume every 20 seconds based on the following formula.
Foaming power per unit time (mL/s) = [foaming amount after X seconds (mL) - foaming amount 20 seconds before X seconds (mL)] / 20 (s)
The maximum value of the foaming force per unit time was taken as the maximum foaming force.
A maximum foaming force of 6 mL/s or more was judged to be good.

In addition, the time until foaming was visually confirmed (foaming time) and the total amount of foaming within the foaming time were measured, and the foaming power was calculated from the results according to the following formula.
Foaming power (mL/s) = foam volume (mL) / foaming time (s)
The results are shown in Table 4 and FIG.

Fragrance ingredients: limonene, citral, phenethyl acetate, linalool Vapor pressure: 0.0000286 mmHg (lowest raw material) to 112 mmHg (highest raw material)

In all of Examples 1 to 5 and Comparative Example 1, the fragrance was sufficiently noticeable immediately after the entire amount of the expandable compression-molded product was dissolved.
From the results of Examples 1 and 2 and Comparative Example 1, when comparing expandable compression molded products with a mass of 80 g, Examples 1 and 2, which have a maximum diameter of 65 mm or more and a surface area of the entire expandable compression molded product of 8000 ^mm2 or more, have high maximum foaming power and maintain a high fragrance intensity even after 1 hour of fragrance release.
The expandable compression-molded product of Comparative Example 1 had the same mass and density as the expandable compression-molded products of Examples 1 and 2, but the maximum diameter and surface area did not meet the specific requirements, the maximum foaming power was less than 6 mL/s, and the fragrance intensity began to decrease 30 minutes after the fragrance began to be released and decreased significantly after 1 hour.
A high maximum foaming power means that the foaming force is strong, which is thought to make it easier for the base note components, which have a low vapor pressure, to volatilize into the air, thereby maintaining the fragrance.
Even in the foamable compression molded products of Examples 3 to 5 having a mass of 100 g, the maximum diameter was 65 mm or more and the surface area of the entire foamable compression molded product was 8000 ^mm2 or more, so that high maximum foaming power and persistence of fragrance were achieved.
Furthermore, when comparing products of the same mass, Example 2 out of Examples 1 and 2 and Comparative Example 1, and Example 4 out of Examples 3 to 5, had a particularly long-lasting fragrance. This is thought to be because the diameter to thickness ratio was in the range of 4 to 4.5.

[Examples 6 to 9, Comparative Example 2]
Except for using the composition of the powder mixture shown in Table 5, cylindrical foamable compression-molded bath additives with the diameter, surface area, and thickness shown in Table 6 were produced under the same conditions as in Example 1.
In addition, similarly to Example 1, the fragrance intensity was evaluated.
The results are shown in Table 6 and FIG.

From the above results, even when the type of fragrance was changed, the bath additives of Examples 6 to 9, which had a maximum diameter of 65 mm or more and a surface area of the entire expandable compression molded product of 8,000 ^mm2 or more, maintained a high fragrance intensity even one hour after the entire amount of the expandable compression molded product had dissolved. Therefore, it was found that the fragrance sustaining effect was exerted regardless of the type of fragrance component.
The bath additives of Examples 6 to 9 are similar to Example 1 except for the type of fragrance, and are therefore presumed to have the same high maximum foaming power as Example 1.

Furthermore, a comparison of Examples 6 to 9 shows that in the cases of Examples 6 to 8, which contained limonene, linalool, or geraniol, the fragrance intensity was better even after one hour than in Example 9, which contained vanillin, which has a lower vapor pressure than these three components, and the fragrance had a stronger lasting effect.
Among Examples 6 to 8, Example 7, which contained limonene, which has the lowest water solubility, performed better than Examples 6 and 8, which contained linalool and geraniol, which have higher water solubility than limonene, and exhibited a stronger fragrance-lasting effect.
Furthermore, vanillin has a vapor pressure of 0.00194 mmHg and corresponds to a base note fragrance component. Its solubility in water is 11 mg/mL, making it slightly insoluble in water, but it tends to be more soluble in water than limonene, linalool, and geraniol. In Example 9, vanillin was blended as a fragrance component, and the fragrance intensity was maintained from immediately after the entire amount of the expandable compression-molded product was dissolved up to one hour later. This demonstrates that even a base note fragrance component that is slightly insoluble in water can exhibit a fragrance-lasting effect by having a maximum diameter of 65 mm or more and a surface area of the expandable compression-molded product of 8,000 ^mm2 or more.

The expandable compression-molded product of Comparative Example 2 had the same fragrance component, mass, and density as the expandable compression-molded product of Example 9, but the maximum diameter and surface area did not meet the specific requirements, and the fragrance intensity began to decrease 30 minutes after the entire expandable compression-molded product had dissolved, and decreased significantly after 1 hour.
The bath additive of Comparative Example 2 is similar to Comparative Example 1 except for the type of fragrance, and therefore, like Comparative Example 1, it is presumed that the maximum foaming power is also low.

[Examples 11 , 10, and 12 ]
Except for using the composition of the powder mixture shown in Table 7, cylindrical foamable compression-molded bath additives with the diameter, surface area, and thickness shown in Table 9 were produced under the same conditions as in Example 1.
In addition, similarly to Example 1, evaluation of fragrance intensity, foaming power, and maximum foaming power were carried out.
The results are shown in Tables 8 and 9 and in FIGS.

Fragrance ingredients: Linalool, linalyl acetate, citronellol, limonene Vapor pressure: 0.0000286 mmHg (lowest raw material) to 3.49 mmHg (highest raw material)

From the results of Example 10, even when the composition of the powder mixture was changed, the bath additive of Example 10, which had a maximum diameter of 65 mm or more and a surface area of the entire foamable compression molded product of 8000 ^mm2 or more, had a high maximum foaming power and maintained a high fragrance intensity even one hour after the entire amount of the foamable compression molded product had dissolved.

In Examples 11 and 12 , even though the maximum diameter was small, the maximum foaming power was high, and the fragrance intensity was maintained at a high level even one hour after the entire amount of the expandable compression-molded product had dissolved. It was found that even if the maximum diameter was small, as long as the maximum diameter was 55 mm or more, the surface area of the entire expandable compression-molded product was 8,000 ^mm2 or more, and the ratio of maximum diameter (mm) to mass (g) was 0.65 or more, the fragrance was good and the fragrance persistence could be improved.

The expandable compression molded product of this embodiment is useful for bath additives, cleaning agents, air fresheners, deodorizers, etc.

Claims (7)

Contains a fragrance having a vapor pressure of 0.00002 to 120 mmHg at 25°C,
The surface area is 8000 mm ² or more and 13000 mm ² or less ,
The surface area of the bottom surface is 2552 mm ² or more and 4541 mm ² or less,
The mass is 80 to 100 g,
An expandable compression-molded product having a ratio of maximum diameter (mm) to mass (g) [maximum diameter (mm)/mass (g)] of 0.65 or more. Contains a fragrance having a vapor pressure of 0.00002 to 120 mmHg at 25°C,
Surface area is 8000mm ² Over 13,000 mm ² is as follows:
The maximum diameter is 57 mm or more,
The mass is 80 to 100 g,
The ratio of the maximum diameter (mm) to the mass (g) [maximum diameter (mm)/mass (g)] is 0.65 or more,
A columnar, expandable compression molded product. Contains organic acids,
The expandable compression-molded product according to claim 1 or 2 , wherein the content of the organic acid is 10 to 55% by mass. Contains carbonate,
The expandable compression-molded product according to claim 1 or 2, wherein the content of the carbonate is 20 to 90 mass%. The expandable compression-molded product according to claim 1 or 2, having a maximum foaming force of 6 mL/s or more and 13 mL/s or less. A method for sustaining the scent of a fragrance by using an expandable compression-molded product containing a fragrance, comprising:
The expandable compression-molded product is
Contains a fragrance having a vapor pressure of 0.00002 to 120 mmHg at 25°C,
The surface area is 8000 mm ² or more and 13000 mm ² or less ,
The surface area of the bottom surface is 2552 mm ² or more and 4541 mm ² or less,
The mass is 80 to 100 g,
A method in which the ratio of maximum diameter (mm) to mass (g) [maximum diameter (mm)/mass (g)] is 0.65 or more. A method for sustaining the scent of a fragrance by using an expandable compression-molded product containing a fragrance, comprising:
The expandable compression-molded product is
Contains a fragrance having a vapor pressure of 0.00002 to 120 mmHg at 25°C,
Surface area is 8000mm ² Over 13,000 mm ² is as follows:
The maximum diameter is 57 mm or more,
The mass is 80 to 100 g,
The ratio of the maximum diameter (mm) to the mass (g) [maximum diameter (mm)/mass (g)] is 0.65 or more,
Columnar, method.