JP2011212390A - Aqueous gel deodorization aromatic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aqueous gel deodorization aromatic and a stand type aromatic, which can hardly be changed not only in the aroma intensity but also in the aroma quality.SOLUTION: The aqueous gel deodorization aromatic includes the following components (a), (b), (c), and water, wherein the aroma giving rate of the component (a) is 1-10 wt.% to the whole composition except the component (c), and the weight ratio of the component (a) to the component (b), that is (a)/(b), is 0.3/1-10/1. The component(a) is an aromatic composition containing following compounds (a-1), (a-2), and (a-3), wherein the content of (a-3) is 10-80 wt.% of the whole of the component (a), the weight ratio of (a-1) to (a-3), that is (a-1)/(a-3), is 0.005/1-2.5/1, the weight ratio of (a-2) to (a-3), that is (a-2)/(a-3), is 0.15/1-8.0/1, wherein (a-1) is a perfume compound of ClogP≤2, (a-2) is a perfume compound of 2<ClogP≤4, and (a-3) is a perfume compound of 4<ClogP≤6. The component (b) is amine oxide, and the component (c) is a crosslinking type water absorbing resin including a copolymer composed of acrylamide and acrylic acid or its salt as constituent monomers.

Description

  The present invention relates to an aqueous gel fragrance excellent in scent sustainability and scent quality maintenance.

  A fragrance using an aqueous gel (hereinafter referred to as an aqueous gel fragrance) is widely used for stationary fragrances and the like because of the advantage that the liquid is not easily spilled from the container and the design is excellent. In particular, an aqueous gel fragrance prepared by absorbing a solution in which an aromatic component is dispersed in a powdered or granular water-absorbing resin has a large surface area of the gel, which promotes volatilization of the aromatic component and is sufficient even in a wide space. It is a very excellent form in that it can be filled with a strong scent.

  A powder or spherical water-absorbing resin that absorbs a solution in which an aromatic component such as a fragrance is dispersed is a cross-linked water-absorbing resin prepared by cross-linking a hydrophilic polymer. In particular, studies have been made on an aqueous gel fragrance using a cross-linked aqueous resin containing an acrylamide-acrylic acid (salt) copolymer having excellent water retention and heat resistance (Patent Document 1).

  On the other hand, stationary air fresheners are strongly demanded for fragrance sustainability and sustained release as well as fragrance. The general period of use of a stationary fragrance using an aqueous gel is one and a half months to two months, and it is desirable that the scent persists during this period.

  In order to maintain the fragrance sustainability, it is considered to reduce the area of the volatilized part or exposed part to the outside, such as reducing the opening area of the container, or to carry a larger amount of fragrance in the aqueous gel. It is done. However, when the opening area of the container is reduced, the scent sustainability is improved, but the scent becomes very weak due to a decrease in the fragrance components that are volatilized outside, and the effect as a fragrance is reduced. Not desirable. Moreover, when a fragrance | flavor is carry | supported to supersaturation with respect to aqueous gel, when preparing the solution which disperse | distributed the fragrance | flavor to high concentration, the problem that it becomes difficult to solubilize a fragrance | flavor arises. Patent Document 2 blends many fragrance materials with low log P values from the viewpoint of solubilization of fragrances in water and fragrance, and uses a nonionic surfactant and a cationic surfactant at a constant ratio to disperse the fragrance. The liquid is efficiently absorbed into the aqueous gel, and the scent of the aqueous gel fragrance and the stationary fragrance is improved. Also in patent document 3, a lot of fragrance | flavor raw materials with a low logP value are used, and the fragrance | flavor is solubilized with the nonionic surfactant whose HLB is in a fixed range.

JP 2007-270100 PR JP2009-261498 JP 2002-331023

  In order to improve the persistence of the fragrance in the aqueous gel fragrance, it is conceivable to add a lot of fragrance materials with high log P values, but such fragrance materials are highly hydrophobic and use a surfactant. It is difficult to solubilize fragrances in water.

  In addition, not only the intensity of the scent but also the quality of the scent greatly affects the problem of scent persistence. Volatilization of the fragrance | flavor component after making it absorb in aqueous gel is natural volatilization. In general, the perfume is localized on the gel surface of the aqueous gel fragrance, and the main volatilization component that contributes to the fragrance is greatly different between the initial stage during the use period and thereafter. As a result, the quality of the scent may change significantly, and this change may lead to consumer dissatisfaction. Even if the intensity of the scent does not change so much, the quality of the scent may change, and the impression of the scent may change greatly as a whole, and it may be felt that there is not sufficient sustainability.

  In patent documents 2 and 3, although evaluation is carried out in terms of fragrance intensity with respect to fragrance persistence, there is no mention of any change in fragrance quality. As described above, for the sustainability of the scent, a comprehensive evaluation from both sides of the strength and quality of the scent is necessary, and the subject of the present invention is not only the strength of the scent but also the quality of the scent. It is to provide less aqueous gel deodorant fragrance and stationary fragrance.

  The present inventors divided the fragrance compounds into three groups using ClogP as an index, and by using a combination of a fragrance component and an amine oxide, which are combined at a certain ratio, with a specific cross-linked water-absorbent resin and water, It has been found that an aqueous gel fragrance satisfying the above requirements can be obtained.

  The present invention includes the following components (a), (b) and (c), and water, and the fragrance ratio of the component (a) with respect to the total composition excluding the component (c) is 1 to 10% by weight, An aqueous gel fragrance having a weight ratio (a) / (b) of component (a) to component (b) of 0.3 / 1 to 10/1 is provided.

(a) comprising the following fragrance compounds (a-1), (a-2) and (a-3), wherein (a-3) is 10 to 80% by weight of the total component (a), (a-3) The weight ratio of (a-1) to (a-1) / (a-3) is 0.005 / 1 to 2.5 / 1, and the weight ratio of (a-2) to (a-3) (a-2) / ( A fragrance composition in which a-3) is 0.15 / 1 to 8.0 / 1
(a-1) Fragrance compound with ClogP ≦ 2
(a-2) Fragrance compound with 2 <ClogP ≦ 4
(a-3) Fragrance compound with 4 <ClogP ≦ 6
(b) Amine oxide
(c) Cross-linked water-absorbent resin containing a copolymer comprising acrylamide and acrylic acid or a salt thereof as constituent monomers

  The present invention also provides a stationary fragrance containing the above aqueous gel fragrance of the present invention in a container.

  According to the present invention, there are provided an aqueous gel air freshener and a stationary air freshener that not only suppresses the change in the intensity of the scent but also reduces the change in the quality of the scent and reduces the overall change in the scent impression. .

((A) perfume composition]
Component (a) used in the present invention is a fragrance composition containing at least one of the following fragrance compounds (a-1), (a-2) and (a-3).
(a-1) Fragrance compound with ClogP ≦ 2
(a-2) Fragrance compound with 2 <ClogP ≦ 4
(a-3) Fragrance compound with 4 <ClogP ≦ 6

  Here, the “logP value” is a logarithmic value of the 1-octanol / water partition coefficient of the compound, and in the partition equilibrium when the compound is dissolved as a solute in a two-liquid solvent system of 1-octanol and water. , Means the ratio of the equilibrium concentration of solute in each solvent, and is generally expressed in the form of logarithm “logP” with respect to the base 10. That is, the logP value is an index of lipophilicity (hydrophobicity). The higher the value, the more hydrophobic, and the smaller the value, the more hydrophilic.

  As for the logP value, for example, the logP value posted in a database available from Daylight Chemical Information Systems, Inc. (Daylight CIS) can be referred to as an actual measurement value, but the program “CLOGP” (Daylight CIS) etc. Can be calculated with

  In the program “CLOGP”, the value of “calculated logP (ClogP)” calculated by the fragment approach of Hansch and Leo is output together with the measured value of logP, if any. The fragment approach is based on the chemical structure of the compound and takes into account the number of atoms and the type of chemical bond (A. Leo, Comprehensive Medicinal Chemistry, Vol. 4, C. Hansch, PG Sammens, JB Taylor and CA Ramsden. Eds., P.295, Pergamon Press, 1990). This ClogP value is currently the most common and reliable estimate, and in the present invention, this ClogP value is used.

  Specific examples of the perfume compounds (a-1), (a-2), and (a-3) are given below (the values in parentheses are ClogP values).

  The fragrance compound (a-1), that is, the fragrance compound with ClogP ≦ 2, includes aldehyde C-6 (1.892), anisaldehyde (1.779), benzyl acetate (1.960), benzyl alcohol (1.104), carone (1.803), Cantoxal (1.951), cis-3-hexenol (1.397), coumarin (1.412), ethyl acetate (0.711), ethyl acetoacetate (0.333), ethyl butyrate (1.769), ethyl maltol (0.467), ethyl vanillin (1.804) , Fructon (0.846), helional (1.387), heliotropin (1.138), hydroxycitronellal (1.541), indoflor crystal (1.331), linalool oxide (1.500), maltol (-0.062), methyl jasmonate (1.935) ), Phenylethyl alcohol (1.183), phenoxyethanol (1.188), phenylpropylal Lumpur (1.712), prenyl acetate (1.684), raspberry ketone (1.072), styrallyl alcohol (1.413), and the like vanillin (1.275).

  Of these, anisaldehyde, benzyl acetate, carone, cantoxal, cis-3-hexenol, coumarin, ethyl acetate, ethyl acetoacetate, ethyl butyrate, ethyl maltol, ethyl vanillin, fructon, helional, heliotropin, hydroxycitronellal , Linalool oxide, maltol, phenylethyl alcohol, raspberry ketone, and vanillin are preferable.

  As the fragrance compound (a-2), that is, the fragrance compound in which 2 <ClogP ≦ 4, amber core (3.969), α-damascon (3.620), aldehyde C-14 peach (3.830), aldehyde C-16 coconut (2.772) ), Allyl amyl glycolate (2.507), benzyl benzoate (3.879), 3- (4-tert-butylphenyl) propanal (3.549), cis-3-hexenyl acetate (2.343), citral (3.120), citronellol (3.253) ), Δ-damascone (3.620), dihydromyrsenol (3.033), dynascone (3.630), ethyl 2-methylbutyrate (2.078), eucalyptol (2.755), eugenol (2.397), florarozone (3.459), fluoropalol (3.430), Flutate (3.370), Geraniol (2.769), Geranyl acetate (3.715), Hexyl acetate (2.827), Indole (2.132), Isoamyl Tate (2.168), Yonon Alpha (3.710), Yonon Beta (3.770), Lactone C-10 Gamma (3.301), Liliar (3.858), Linalool (2.549), Linalyl Acetate (3.495), Mayol (3.333), l-Menthol (3.233), l-Menton (2.831), Lilal (2.150), Manzanate (2.607), Methyldihydroxyjasmonate (2.419), Pample Fleur (3.039), Phenoxyethyl Isobutyrate (2.923), Poarenate (3.670), Lubafuran 2.772), rose oxide (2.896), styrylyl acetate (2.269), styrylyl propionate (2.798), terpineol (2.629), terpinyl acetate (3.575), tetrahydrolinalool (3.517), tetrahydromegol (3.517) , Tricyclodecenyl acetate (2.357), tricyclodecenyl propione (2.886), triplar (2.361), undecabertole (3.692), and the like.

  Of these, aldehyde C-14 peach, cis-3-hexenyl acetate, citral, citronellol, δ-damascone, dihydromyrcenol, dynascon, ethyl 2-methylbutyrate, hexyl acetate, indole, yonon beta, linalool, linalyl Acetate, l-menthol, rilal, methyl dihydroxy jasmonate, lubafuran, styryl acetate, tricyclodecenyl acetate and tripral are preferred.

  As the fragrance compound (a-3), that is, the fragrance compound in which 4 <ClogP ≦ 6, acetyl cedrene (4.233), aldehyde C-10 (4.008), ambroxan (5.266), amylcinnamic aldehyde (4.324), Amyl salicylate (4.561), β-pinene (4.182), β-damascone (4.710), benzyl salicylate (4.213), boysambrene forte (5.480), cedryl methyl ether (5.106), cis-3-hexenylbenzoate (4.272) , Cis-3-hexenyl hexanoate (4.459), cis-3-hexenyl salicylate (4.606), citronellyl acetate (4.199), citronellyl nitrile (4.364), cyclohexyl salicylate (4.476), damacenone (4.286), diphenyl oxide (4.240), ethylene brush rate (4.622), farnesol (4.800), flora mat (4.508), γ-tar Nene (4.352), geranyl propionate (4.244), hexylcinnamic aldehyde (4.853), hexyl salicylate (5.090), isoea super (4.650), isoamyl salicylate (4.431), isolongifolanone (4.128), lactone C -12 Delta (4.389), Lactone C-12 Gamma (4.359), Lemonyl (4.409), Ligstral Esby (5.036), Limonene (4.352), Methylionone-G (4.019), Musk C-14 (4.063), Nectaryl (4.438), nerolidol (4.580), ot-butylcyclohexyl acetate (4.059), p-menthane (5.320), p-cymene (4.868), phenylethyl salicylate (4.392), pt-butylcyclohexyl acetate (4.059), sandals Synth (4.518), terpinolene 90 (4.352), 2,2,5-trimethyl-5-pentylcyclopentan-1-one (4.498) The

  Of these, acetyl cedrene, ambroxan, β-damascone, benzyl salicylate, boysambrene forte, cis-3-hexenyl salicylate, citronellyl acetate, citronellyl nitrile, cyclohexyl salicylate, damacenone, ethylene brushate, hexylcinnamic aldehyde Hexyl salicylate, iso-Esuper, limonene, methyl ionone-G, nectaryl, ot-butylcyclohexyl acetate, pt-butylcyclohexyl acetate, and sandal synth are preferred.

  As a combination of the fragrance compounds (a-1), (a-2) and (a-3), any of the following (i) to (iv) is shown because the change in fragrance quality is particularly small A combination is preferred.

Combination (i)
(a-1) contains at least one fragrance selected from phenylethyl alcohol, hydroxycitronellal, benzyl acetate, and anisaldehyde,
(a-2) includes at least one fragrance selected from citronellol, δ-damascone, lyial, linalool, and methyldihydrojasmonate,
(a-3) includes one or more fragrances selected from β-damascone, citronellyl acetate, damassenone, nectaryl, and hexylcinnamic aldehyde.
This combination is preferable in that the change in the quality of the floral scent is reduced.

Combination (ii)
(a-1) includes linalool oxide,
(a-2) includes one or more fragrances selected from citral, dihydromyrsenol, and lubafuran,
(a-3) includes one or more fragrances selected from citronellylnitrile and limonene.
This combination is preferable in that the change in citrus scent quality is reduced.

Combination (iii)
(a-1) includes one or more flavors selected from raspberry ketone, maltol, fructon, ethyl maltol, ethyl butyrate, ethyl acetoacetate, ethyl acetate,
(a-2) includes at least one fragrance selected from aldehyde C-14 peach (γ-undecalactone), ethyl 2-methylbutyrate, tricyclodecenyl acetate,
As (a-3), ot-butylcyclohexyl acetate is included.
This combination is preferable in that the change in the quality of the fruity scent is reduced.

Combination (iv)
(a-1) includes one or more fragrances selected from helional, cis-3-hexenol, cantoxal, caron,
(a-2) includes at least one fragrance selected from cis-3-hexenyl acetate, dynascon, hexyl acetate, styryl acetate, and tripular.
(a-3) includes cis-3-hexenyl salicylate.
This combination is preferable in that the change in the quality of the green scent is reduced.

  In the present invention, the component (a) contains 10 to 80% by weight of the whole component (a) from the viewpoint of sufficiently maintaining the strength and quality of the fragrance, preferably 15 -70% by weight, more preferably 20-60% by weight.

  From the viewpoint of sufficiently maintaining the strength and quality of the scent, the weight ratio (a-1) / (a-3) of (a-1) to (a-3) is 0.005 / 1 to 2.5 / 1, preferably 0.1 / 1 to 2.0 / 1, more preferably 0.3 / 1 to 1.2 / 1, and particularly preferably 0.3 / 1 to 0.8 / 1.

  Further, from the viewpoint of sufficiently maintaining the strength and quality of the scent, the weight ratio (a-2) / (a-3) of (a-2) to (a-3) is 0.15 / 1 to 8.0 / 1, preferably 0.5 / 1 to 3.0 / 1, more preferably 0.7 / 1 to 2.0 / 1.

  The perfume rate of component (a) in the aqueous gel fragrance of the present invention, that is, the ratio of component (a) to the total composition excluding component (c) is 1 to 10% by weight, preferably 1.5 to 7% by weight. More preferably, it is 2 to 5% by weight.

[(B) Amine oxide]
The amine oxide of component (b) is used as a component for dispersing the fragrance of component (a). Specific examples of the component (b) include compounds represented by any one of the following general formulas (b-1) to (b-4), and in particular, from the viewpoint of fragrance persistence, the general formula The compound represented by (b-1) is preferred.

[Wherein, R ¹ represents a linear or branched alkyl group having 8 to 22 carbon atoms or a linear or branched alkenyl group having 8 to 22 carbon atoms, and k represents an integer of 2 to 5. ]

[Wherein, R ² represents a linear or branched alkyl group having 8 to 22 carbon atoms or a linear or branched alkenyl group having 8 to 22 carbon atoms. ]

[In the formula, R ³ represents a linear or branched alkyl group having 8 to 22 carbon atoms or a linear or branched alkenyl group having 8 to 22 carbon atoms, and l and m satisfy l + m = 2 to 10; Indicates a positive integer. ]

[Wherein, R ⁴ represents a linear or branched alkyl group having 8 to 22 carbon atoms or a linear or branched alkenyl group having 8 to 22 carbon atoms, and n represents an integer of 1 to 10. ]

  The content of the component (b) in the aqueous gel fragrance of the present invention is the initial fragrance without being too strong and not too weak. 0.1-10 weight% in a composition is preferable, 0.3-8 weight% is more preferable, 0.5-6 weight% is still more preferable.

  The weight ratio of component (a) to component (b) is 0.3 / 1 to 10/1, preferably 0.5 / 1 to 8 from the viewpoint of incorporating component (a) into the aqueous gel. / 1, more preferably 1/1 to 5/1.

[(C) Acrylamide resin]
Component (c) of the present invention comprises a cross-linked water-absorbing material comprising a copolymer comprising acrylamide and acrylic acid or a salt thereof (hereinafter referred to as “acrylamide-acrylic acid (salt) copolymer”). It may be used alone or in combination of two or more. Component (c) is an absorptive carrier that absorbs a liquid mixture containing component (a), component (b) and water.

  The acrylamide-acrylic acid (salt) copolymer may be a block copolymer or a random copolymer. The composition ratio of acrylamide and acrylic acid (salt) in the acrylamide-acrylic acid (salt) copolymer is not particularly limited, but the weight ratio of acrylamide and acrylic acid (salt) [acrylamide / acrylic acid (salt) )] Is preferably 0.1 / 1 to 50/1, more preferably 0.5 / 1 to 25/1, and still more preferably 1/1 to 15/1.

  Here, acrylic acid (salt) means acrylic acid and / or acrylate. As the acrylate, metal acrylate and further sodium acrylate are preferable.

  The acrylamide-acrylic acid (salt) copolymer may contain monomers other than acrylamide and acrylic acid (salt) as constituent monomers. Among the constituent monomers, acrylamide and acrylic acid ( The total salt) is preferably 50 to 100 mol%, more preferably 75 to 100 mol%.

  The cross-linked water-absorbing resin containing the acrylamide-acrylic acid (salt) copolymer of component (c) can be produced by a known method, but the design viewpoint of the finally prepared aqueous gel air freshener From the above, it is preferable to produce by a reverse phase suspension polymerization method. Component (c) may be substantially composed of an acrylamide-acrylic acid (salt) copolymer.

  The water absorption of component (c) is preferably from 50 to 300 g, more preferably from 75 to 150 g, even more preferably from 100 to 200 g, based on 1 g of component (c). . If the amount of ion-exchanged water absorbed per 1 g of component (c) is 50 g or more, the design of the aqueous gel fragrance will be good, and if it is 300 g or less, the strength of the aqueous gel fragrance will be sufficient.

  Examples of the component (c) include Hisobead manufactured by Aiki Seimitsu Chemical, AIRBZ manufactured by Lion Chemical, and the like.

  The form of the component (c) is not particularly limited, but granular is preferable from the viewpoint of increasing the contact area with air and improving fragrance formation, and the average particle diameter in a dry state before contacting the fragrance dispersion is 500 to 4000 μm is preferable, and 800 to 3500 μm is more preferable. The average particle size can be measured by sieving using sieves for JIS test sieve standards [for example, No. 5 to No. 35 (4 mm to 500 μm in nominal aperture)].

((D) Nonionic surfactant)
In order to further improve the dispersibility of the component (a), the aqueous gel fragrance of the present invention can further contain a nonionic surfactant as the component (d).

  As the component (d), a nonionic surfactant represented by any one of the following general formulas (d-1) to (d-3) is preferable from the viewpoint of good stability of the aqueous gel fragrance. Among them, the nonionic surfactant represented by the general formula (d-1) is preferable from the viewpoint of dispersibility of the fragrance, and the nonionic surfactant represented by the general formula (d-2) It is preferable from the viewpoint of maintenance.

[Wherein, R represents a linear or branched alkyl group having 8 to 22 carbon atoms or a linear or branched alkenyl group having 8 to 22 carbon atoms, p represents an integer of 3 to 50, and q represents The integer of 0-10 is shown and p + q = 3-50 is satisfy | filled. The addition of ethyleneoxy group and propyleneoxy group may be either random addition or block addition. ]

[In the formula, R ′ represents a linear or branched alkyl group having 8 to 22 carbon atoms or a linear or branched alkenyl group having 8 to 22 carbon atoms, and a1, b1, and c1 are a1 + b1 + c1 = 1-50. 0 or a positive integer satisfying ]

[Wherein R ″ represents a linear or branched alkyl group having 8 to 22 carbon atoms or a linear or branched alkenyl group having 8 to 22 carbon atoms, and a2, b2 and c2 are a2 + b2 + c2 = 1 to 0 or a positive integer satisfying 50 is shown.]

  Among the components (d), R of the nonionic surfactant represented by the general formula (d-1) has 10 to 20 carbon atoms from the viewpoint of easy dispersion of the component (a). Is preferably 12-18. From the viewpoint of good water absorption of the cross-linked water-absorbent resin, p is preferably an integer of 3 to 40, more preferably 3 to 30, q is preferably an integer of 0 to 8, more preferably 0 to 5, and p + q is An integer of 3 to 40, more preferably 3 to 30, is preferable.

  Among the components (d), R ′ and R ″ of the nonionic surfactants represented by the general formulas (d-2) and (d-3) are from the viewpoint of easy dispersion of the component (a). The number of carbon atoms is preferably 10 to 20, more preferably 12 to 18. Further, a1 + b1 + c1 and a2 + b2 + c2 are each preferably an integer of 3 to 40, more preferably 3 to 30, from the viewpoint of good water absorption of the crosslinked water-absorbent resin. .

  The content of the component (d) in the aqueous gel fragrance of the present invention is 0.05 to 10% by weight, more preferably 0.1 to 8% in the total composition excluding the component (c) from the viewpoint of good water absorption of the water absorbent resin. % By weight, more preferably 0.3 to 6% by weight.

  The weight ratio (b) / (d) of component (b) to component (d) is preferably 0.1 / 1 to 20/1, more preferably 0.5 / 1 to 20/1, and further 0.5 / 1 to 15/1. Further, 0.5 / 1 to 10/1, more preferably 1/1 to 10/1 are preferable. When the ratio of the component (b) to the component (d) is 0.1 / 1 or more, the scent sustainability is good, and when it is 20/1 or less, the initial scent is appropriate.

  In addition, the weight ratio (b) / (d-1) of the component (d) to the component (b) is 0.1 / 1 to 20/1 from the viewpoint of good dispersibility of the fragrance. Further, it is preferably 0.3 / 1 to 15/1, more preferably 0.5 / 1 to 10/1.

  The weight ratio (b) / (d-2) of component (d) to component (b) is 0.1 / 1 to 10/1 from the viewpoint of maintaining the quality of the scent, Is preferably 0.2 / 1 to 9/1, more preferably 0.3 / 1 to 8/1.

[Other ingredients]
In the aqueous gel fragrance of the present invention, as other components, solvents generally added to stationary aqueous gel fragrances, oils, salts such as sodium sulfate and N, N, N-trimethylglycine, pH adjustment Agents, antioxidants, preservatives, bactericides / antibacterial agents, pigments, UV absorbers and the like can be added.

[Production of aqueous gel fragrance]
The aqueous gel fragrance of the present invention comprises a component (a), a component (b) and water, and a component (c) is mixed with a liquid mixture having a perfume rate of 1 to 10% by weight. Thus, the component (c) can be produced by absorbing the liquid mixture. The mixing ratio of the liquid mixture to the component (c) depends on the water absorption capacity of the component (c), but the weight ratio of the liquid mixture / component (c) is 100/1 to 100/20, more preferably 100/2 to 100. / 10 is preferred.

(Deferred air freshener)
The aqueous gel fragrance of the present invention can be used as a fragrance as it is, but is preferably a stationary fragrance containing the aqueous gel fragrance in a container. In the present invention, the container in which the aqueous gel fragrance is accommodated can contain the aqueous gel fragrance and has an open portion, and the fragrance / deodorant component [component in the aqueous gel fragrance from the open portion] As long as it can volatilize (a)], its shape and structure are not particularly limited, and those having an open portion at the top and those at other portions such as a side portion can be used.

  As the container, materials such as plastic, glass, and metal can be used, but the inside of the water-based gel fragrance can be visually observed through a transparent or translucent material, a slit, an opening, or the like. A structure is preferred. Furthermore, plastic containers generally used for fragrances and deodorants, specifically containers such as polyethylene terephthalate (PET), polypropylene, polyethylene and polystyrene are preferably used.

  Further, the container can be provided with a contrasting color on the inner wall of the container and the aqueous gel fragrance so that the contraction (reduction) of the aqueous gel fragrance can be more clearly observed as required.

  Moreover, the aqueous gel fragrance | flavor of this invention can also be accommodated in the simple container for refilling. The water-based gel air freshener contained in the simple container is housed in the airtight container in a sealed state. For example, when the water-based gel air freshener installed and used reaches the end of use, the container is opened. The aqueous gel fragrance contained in the simple container can be transferred to another container for installation and used.

  In this case, the simple container containing the aqueous gel fragrance of the present invention may be a refillable simple container such as a thin-walled bottle or a pouch. For thin bottles, materials such as polyethylene terephthalate (PET), polypropylene, and polyethylene are preferable. For pouches, plastic films such as PET, polypropylene, polyethylene, and nylon, and aluminum laminated on these plastic films, aluminum deposition, silica deposition, etc. The film which gave is preferable.

  When the aqueous gel fragrance of the present invention is accommodated and installed in a container, the amount of the aqueous gel fragrance accommodated / installed is not particularly limited, depending on the characteristics such as the place to be used, the period of use, the container shape, etc. The amount used can be selected as appropriate. Moreover, the aqueous gel fragrance | flavor which has a mutually different color tone and / or fragrance | flavor tone can also be accommodated and installed in the same container.

  The water-based gel air freshener of the present invention shrinks the gel-like product due to the evaporation of water and various components from the water-based air freshener over time, and the residual when this shrinkage reaches the critical weight (use It is less than 20% of the weight in the container at the start). Therefore, the end point of use and the replacement time of the fragrance deodorant composition can be easily judged by visually checking the contraction state of the composition over time from the outside of the container, for example. can do.

  Although the expression mechanism for the excellent fragrance persistence in the aqueous gel fragrance of the present invention is not completely understood, it is presumed as follows. When a liquid mixture containing a fragrance dispersed with amine oxide is absorbed into a water absorbent resin containing an acrylamide-acrylic acid (salt) copolymer, the amine oxide and acrylamide-acrylic acid (salt) The coalescence interacts and the amine oxide is retained in the acrylamide-acrylic acid (salt) copolymer. And along with this, the fragrance dispersed by amine oxide is also held simultaneously in the acrylamide-acrylic acid (salt) copolymer, preventing the fragrance from being unevenly distributed from the center of the aqueous gel to the surface layer, It is thought that it is held in a relatively uniformly dispersed state. By holding the fragrance without being unevenly distributed in the aqueous gel, the fragrance is gradually volatilized from the surface layer portion, and it is estimated that the change in the fragrance volatilization rate is prevented and the fragrance is excellent. In order not to be in such a state even if the liquid mixture in which the fragrance is dispersed using a surfactant other than amine oxide is absorbed in a cross-linked water-absorbing resin containing an acrylamide-acrylic acid (salt) copolymer, It is presumed that an aqueous gel composition satisfying the scent durability cannot be obtained.

Test Example 1 Solubility Test <Gel Preparation Method>
A surfactant, a fragrance composition (A22 shown in Table 4), and ion-exchanged water are added to a glass bottle that can be sealed in the proportions shown in Table 1 and capped.
Then, it is stirred at 40 ° C. for 20 minutes and left at room temperature.

<Evaluation method>
The prepared sample is placed on black paper, and compared with a sample containing only ion-exchanged water, it is visually evaluated whether it is cloudy.
In the case of the same appearance as the sample with only ion-exchanged water, it is judged that it is solubilized (◯), and in other cases, it is judged that it is not solubilized (x).

Examples 1-31, Comparative Examples 1-5
The fragrance compositions A1 to A33 used in Examples and Comparative Examples are shown in Tables 2 to 8.
In addition, the value in a table | surface is a weight ratio of the fragrance | flavor when the fragrance | flavor density | concentration of A3 in a fragrance | flavor composition is set to 1 about fragrance | flavor compositions A1-A20 and A29-A33. A21 to A28 are weight ratios of fragrances when the total amount of A3 in the fragrance composition is 100.

<Method for Preparing Aqueous Gel Air Freshener>
19 g of the liquid mixture shown in Tables 9 to 12 prepared using the fragrance compositions shown in Tables 2 to 8 and 1 g of a granular cross-linked water-absorbing resin were used. ), The lid was closed, and the mixture was allowed to stand at 25 ° C. for 24 hours to absorb the liquid mixture into the water absorbent resin to prepare an aqueous gel fragrance.

<Evaluation of fragrance strength>
20 g of the aqueous gel fragrance of the example or comparative example prepared by the above method was put in a plastic cylindrical container (diameter 5 cm, height 4 cm), and 1.1 mx 1.1 mx 2.0 m (with the lid open) Place in the center of the floor of an acrylic glass-lined booth with a volume of 2420 L) and let it volatilize naturally without ventilation for 30 minutes. Then evaluate the scent in the booth from a small window at a height of 1.2m.
The same sample is evaluated immediately after the lid is opened, when the weight of the aqueous gel fragrance is reduced by 40% by weight, and at the same time when the weight is reduced by 80% by weight, and the sustainability of the scent intensity is evaluated.
The evaluation was performed by four specialist panels according to the following six-step odor intensity display method, and the average score was obtained and shown in Tables 9-12.

・ 6-level odor intensity display method 0: Odorless 1: Slightly scented but not scented (detection threshold)
2: I feel weak enough to understand the quality of the fragrance (cognitive threshold)
3: The scent is understood enough. 4: The scent is felt strongly. 5: The scent is felt very strongly.

<Evaluation of fragrance quality>
The evaluation of the change in fragrance quality is based on the following criteria (11 levels): the scent impression of the sample at 40% by weight reduction, the sample at 80% by weight reduction, and the sample immediately after opening the lid Perform by similarity rating.
The evaluation was performed by four specialist panels according to the evaluation scale of the 11-level scent similarity rating shown below, and the average score was obtained and shown in Tables 9-12.

・ Score rating scale 0: completely different ~ 10: completely the same

<Aroma persistence criteria (overall evaluation)>
If the difference in scent intensity is less than 1.75 rank and the similarity rating is 5 or more when the weight is reduced by 80% by weight compared to the initial level, the scent has excellent sustainability and the intensity change is less than 1 rank. If the degree rating is 6 or more, it can be said that the fragrance sustainability is further excellent.
From this point of view, the scent persistence was determined according to the following criteria and shown in Tables 9-12.

×: Strength change is 2 ranks or more and similarity rating is less than 4 △: Strength change is 1.75 ranks or more and similarity rating is less than 5 ○: Strength change is 1 rank or more and less than 1.75 rank, similarity rating is 5
○ to ◎: Strength change is 1 rank or more and less than 1.75 rank, similarity rating is 5.25 or more and less than 6 ◎: Strength change is less than 1 rank, similarity rating is 6 or more

Claims (6)

The following components (a), (b) and (c), and water, the fragrance rate of component (a) with respect to the total composition excluding component (c) is 1 to 10% by weight, component (a) An aqueous gel fragrance in which the weight ratio (a) / (b) between the component and component (b) is 0.3 / 1 to 10/1.
(a) comprising the following fragrance compounds (a-1), (a-2) and (a-3), wherein (a-3) is 10 to 80% by weight of the total component (a), (a-3) The weight ratio of (a-1) to (a-1) / (a-3) is 0.005 / 1 to 2.5 / 1, and the weight ratio of (a-2) to (a-3) (a-2) / ( A fragrance composition in which a-3) is 0.15 / 1 to 8.0 / 1
(a-1) Fragrance compound with ClogP ≦ 2
(a-2) Fragrance compound with 2 <ClogP ≦ 4
(a-3) Fragrance compound with 4 <ClogP ≦ 6
(b) Amine oxide
(c) Cross-linked water-absorbent resin containing a copolymer comprising acrylamide and acrylic acid or a salt thereof as constituent monomers   The aqueous composition according to claim 1, comprising a component (a), a component (b) and water, and a liquid mixture in which the perfume rate of the component (a) is 1 to 10% by weight and the component (c). Gel air freshener. The aqueous gel fragrance according to claim 1 or 2, wherein the component (b) is an amine oxide represented by the following general formula (b-1).

[Wherein, R ¹ represents a linear or branched alkyl group having 8 to 22 carbon atoms or a linear or branched alkenyl group having 8 to 22 carbon atoms, and k represents an integer of 2 to 5] . ]   The aqueous gel fragrance according to any one of claims 1 to 3, further comprising (d) a nonionic surfactant.   6. The aqueous gel fragrance according to claim 5, wherein the weight ratio of component (b) to component (d) is (b) / (d) = 0.1 / 1 to 20/1.   A stationary fragrance containing the aqueous gel fragrance according to any one of claims 1 to 5 in a container.