JP4537782B2 - Gel air freshener - Google Patents

Description

  The present invention relates to a gel fragrance. More specifically, the present invention relates to an improvement of a fragrance in which a volatile substance such as a fragrance is dispersed in a water-soluble gel such as gellan gel.

  Conventionally, as gel fragrances, water-soluble gels using natural polymer compounds such as carrageenan and agar gel as gelling agents, and oil-soluble gels using fatty acid soap or dibenzylidene sorbitol as gelling agents are generally known. . Gel fragrances that use these natural polymer compounds and synthetic polymer compounds as gelling agents are often opaque or translucent.

  In addition, in order to respond to consumers who prefer a transparent and beautiful appearance in recent years, gellan gel using a gelling agent called gellan gum (Japanese Patent Application Laid-Open No. 64-74239) and a gelling agent such as carrageenan or agar are specified. A transparent hydrogel fragrance using a specific amount of a surfactant has been proposed (Japanese Patent Application Laid-Open Nos. 60-135058 and 62-41661).

  Any of the gel fragrances is obtained by emulsifying or solubilizing a fragrance in the gel itself, and it is essential to use a surfactant in order to prevent separation of water from the fragrance / oil during gelation. On the other hand, this surfactant inhibits volatile transpiration of fragrances and the like, and the entire amount becomes a residue without transpiration. For this reason, the prescription design is made to minimize the use amount as much as possible, but at present, it is often used in a slightly excessive amount in order to emphasize the stability of the product.

JP-A 64-74239 JP-A 62-41661 Japanese Patent Laid-Open No. 60-135058

  Further, since the surfactant does not evaporate, all of it always remains in a large amount as a residue, so that the end point becomes unclear. That is, there is a problem of giving consumers the illusion that they can still be used even though they do not function as a fragrance at all or sufficiently.

  In addition, the use of a surfactant is accompanied by a problem that it does not produce a good natural fragrance because it inhibits volatilization and transpiration of volatile substances such as fragrances. And since surfactant changes the discharge | release of a fragrance | flavor, it does not become a scent as intended, but a big gap arises between the scents at the time of creation. On the other hand, in the case of a type that emulsifies by using a small amount of surfactant, the amount of residue can be reduced as compared with the transparent type hydrogel fragrance, but the surfactant residue and influence can still be eliminated. However, there is a problem that the initial odor is strong but the fragrance becomes weak immediately. Further, since the volatile substance itself is not completely released by the surfactant and becomes a part of the residue, there is a problem that the residue after transpiration is increased.

  An object of this invention is to provide the gel-like fragrance | flavor which does not use surfactant, and its manufacturing method. Another object of the present invention is to provide a gel fragrance having a constant fragrance quality and fragrance strength, and a method for producing the same.

In order to achieve such an object, the gel fragrance of the present invention includes a gel containing no surfactant and water and a water-soluble gelling agent, a specific gravity adjusted to a specific gravity of 1 or more, and dispersed in droplets in the gel. Containing volatile substances. According to this gel fragrance, since the surfactant is not contained in the gel, the volatilization / transpiration of the volatile substance is not hindered and the volatile substance is released well. Volatile substances can be volatilized and evaporated from the beginning to the end of use because the volatile substances infiltrate into the gel from the exposed volatile substance particles exposed on the gel surface or from the gel surface. Will end and become stable. That is, in the case of a volatile substance such as a fragrance, the quality of the scent and the strength of the scent are constant. Furthermore, since the surfactant is not included, the residue after volatilization and transpiration of the volatile substance becomes very small. Further, since the volatile substance is dispersed in the form of droplets, the volatile substance is dispersed in a state where it floats in the transparent gel, so that a visually beautiful appearance can be exhibited. The perfume component is not contained in the gel itself, but is dispersed and mixed in the form of droplets in the gel.

Moreover, the present invention is the gel fragrance according to claim 1 , wherein the microencapsulated volatile substance is further dispersed . When a fragrance, essential oil, or the like is blended in a microencapsulated state, the fragrance is emitted later than the volatile substance dispersed in droplets, so that the scent sustainability can be improved.

  Further, in the gel fragrance according to claim 1 or 2, the present invention uses a fragrance component having a specific gravity of 1 or more as a specific gravity adjusting agent for adjusting the specific gravity of a volatile substance, preferably Benzyl salicylate and benzyl benzoate are used.

Method for producing a gel fragrances of the present invention, water to dissolve the water-soluble gelling agent without the addition of a surfactant stirring to prepare a gel base, a specific gravity of 1 or more in the gel base while stirring the gel base A volatile substance adjusted in specific gravity is dropped, and the volatile substance is dispersed in the form of droplets in the gel and then solidified. Therefore, gelation proceeds while a volatile substance whose specific gravity is adjusted to 1 or more is suspended in the gel base by stirring, and the gel base is solidified and volatile while the volatile substance is dispersed in the gel. Substances can be trapped in the gel.

  At this time, the volatile substance is preferably cooled to 0 ° C. or lower before being added, more preferably −5 to −18 ° C., particularly preferably −12 to −17 ° C. It is that you are. In this case, since the volatile substance is dripped onto the gel base and the gel base around the volatile substance is rapidly cooled to partially become a gel, (the volatile substance is broken into small particles or partially volatilized. In other words, the particles of the volatile substance float in the gel base in a state of being covered with the gel, so that the dispersion is performed better and the transparency of the gel is ensured.

  Thus, according to the gel fragrance of the present invention, the volatilization / transpiration of the volatile substance is not hindered, so that the release / transpiration of the volatile substance is good. In addition, since the volatile material is infiltrated from the particles of the volatile material exposed on the gel surface or the gel surface evaporates in order from the gel surface, the volatile material evaporates from start to finish. Therefore, in the case of volatile substances such as fragrances, the scent quality and strength can be kept constant, and the scent quality (scent quality) and strength (scent strength) are both compatible and sustained. A gel fragrance composition having excellent properties can be provided. That is, since it is not necessary to devise a contrivance (adding a fragrance material with a strong fragrance intentionally) in anticipation that the fragrance intensity decreases with the start of use, a good natural fragrance with a good fragrance smell can be obtained.

  Furthermore, according to the gel fragrance of the present invention, since no surfactant is used, there is very little residue after volatilization / transpiration of volatile substances and fragrances, and the end point (life) as a fragrance is clear. Therefore, there is little illusion to the customer if it can still be used even though there is no aromatic component left.

Further, according to the present onset Ming gel fragrances, since volatile materials are distributed in the form of droplets, for distributing in the state of floating volatiles in a transparent gel, visually and a beautiful Appearance can be exhibited.

  Further, according to the method for producing the gel fragrance of the present invention, the volatile substance can be solidified by solidifying the gel base with the volatile substance dispersed in the gel without using any surfactant. Therefore, a more transparent and beautiful gel air freshener can be realized.

  Furthermore, in this method for producing a gel fragrance, when the volatile substance is cooled to 0 ° C. or lower before adding the volatile substance, the gel base around the volatile substance is rapidly cooled at the same time as the volatile substance is dropped onto the gel base. Because it partially forms a gel, the volatile material is not broken into small particles or partly volatilized or volatilized, and the particles of volatile material float in the gel base with the gel covered. Can be performed better and provide a more transparent gel fragrance.

Hereinafter, the configuration of the present invention will be described in detail based on the best mode shown in the drawings.
The gel fragrance of the present invention is a gel fragrance that does not use any surfactant. Such a gel fragrance coexists with a volatile substance in a state of being dispersed in the gel as droplets. More specifically, it is a gel fragrance containing a gel containing water and a water-soluble gelling agent that does not contain a surfactant, and a volatile substance that has been adjusted in specific gravity to a specific gravity of 1 and dispersed in the gel.

  In the present invention, as the water-soluble gelling agent, any of those generally used in gel-like compositions that are transparent and become a gel that does not color with time is used. For example, gellan gum, carrageenan, agar or the like is used, and among them, the use of a thermoreversible gelling agent such as gellan gum is preferable for obtaining good dispersion of volatile substances. Here, although there is no restriction | limiting in particular as the usage-amount of a gelatinizer, it is 0.1 to 1.5%, Preferably it is 0.3 to 0.8 weight%. If it is less, there is a problem (gel destruction) in stability (heat and light abuse), and if it is too much, the finish (many water separation, transparency decreases, fragrance becomes weaker, residue increases) becomes worse.

  Moreover, gel strength can be adjusted with the combination with salts. In particular, the calcium salt aqueous solution is added to make the gellan gel irreversible, and the amount is preferably 2 to 4% as a 1% calcium chloride aqueous solution when the gellan gel is 0.3 to 0.8% by weight. Other calcium salts (calcium lactate) can also be used.

  In addition, there is no restriction | limiting in this gel base using the substance added as needed, for example, antiseptic | preservative, a coloring agent, etc. except surfactant. The use of water-soluble dyes is preferable for coloring the gel. In addition, functional raw materials such as deodorants and antioxidants are added as necessary.

  As volatile substances, in addition to various fragrances, essential oils, and components constituting these compositions, those that volatilize and emit fragrance, those that have a deodorizing action, and those that have antibacterial and antifungal actions are added. There is no particular limitation. Although there is no restriction as a material for volatile substances, the addition of materials that are easily soluble in water (for example, light esters, aromatic alcohols, aliphatic alcohols, light aldehydes) can be dispersed in the gel in the form of droplets. It is preferable not to put much. Also, terpenes, which are the main components of citrus, have a relatively low specific gravity, so it is difficult to make the specific gravity 1 or more, but it is possible to adjust the specific gravity with a large amount of specific gravity adjusting agent and devise the stirring conditions during the manufacturing process. Is possible. These volatile substances are kept in a state of being dispersed in the gel, and are exposed to the surface of the gel or are leached into the gel and gradually volatilize and evaporate from the surface of the gel. Further, the volume of the gel gradually decreases due to volatilization and transpiration of volatile substances and moisture.

  Examples of the volatile substance include terpene hydrocarbons such as α-pinene, β-pinene, myrcene, limonene, and 1,8-cineole, amyl acetate, amyl propionate, prenyl acetate, hexyl acetate, cis-3- Esters such as hexyl acetate, allyl caproate, tetrahydrolinalyl acetate, ethyl caproate, ethyl butyrate, ethyl acetoacetate, allylisoamyloxyacetate, aliphatic aldehydes having 6 to 13 carbon atoms, benzaldehyde, 2, 4- Aldehydes such as dimethyl-3-cyclohexene-1-carboxaldehyde, lemon oil, orange oil, lime oil, eucalyptus oil, cypress oil, hiba oil, pine oil, bergamot oil, peppermint oil, turpentine oil, ho oil, lavender Oil, ja Mention may be made of essential oils such as sumin oil and vanilla. Moreover, fragrance | flavors, such as a rose, a sweet pea, an anteater, lemon, lime, jasmine, an herb, apple, mint, the fragrance of a forest, and a lantern, can be mentioned. Moreover, essential oil and fragrance | flavors, such as peppermint white oil, bergamot oil, lemon oil, jasmine oil, orange oil, and these structural components can be mentioned. Here, the selection of the material of the volatile substance is appropriately selected depending on the kind, quality, application, and the like of the required fragrance, but preferably the one having a specific gravity closer to 1. If the specific gravity is a volatile substance close to 1, the amount of the specific gravity adjusting agent used is small, and the addition ratio of the volatile substance such as a fragrance component to be added is not reduced.

  Although the compounding quantity of a volatile substance is suitably selected as needed, it is 0.1 to 10 weight% of a gel composition, Preferably it is 2.0 to 6.0 weight%. If it is less than 0.1% by weight, the volatile substance is not sufficiently volatilized and satisfactory results cannot be obtained. On the other hand, if it exceeds 10% by weight, the gel strength is lowered, which is not preferable.

  Note that dyes and pigments are used for coloring these volatile substances. For example, the use of oil-based dyes and pigments is preferred for coloring fragrances. Moreover, it is preferable to add an ultraviolet absorber for preventing coloring of a fragrance and preventing fading of a pigment.

  The specific gravity adjusting agent has a specific gravity of 1 or more, preferably about 1 so that when a volatile substance or an additive containing the volatile substance is added to the gel base and solidified, it can be dispersed in a floating state in the gel base. It adjusts so that it may become. Although there is no restriction | limiting as a raw material of this specific gravity adjusting agent, Use of what does not have a chemical influence on the volatile substance to be used is preferable. In addition, water-friendly materials, such as polyhydric alcohols, can easily migrate into the gel and may assist in emulsifying and solubilizing volatile substances. As the specific gravity adjusting agent for performing the above, it is preferable to use a fragrance component. In the case of fragrances that are generally used, most have a specific gravity of 1 or less. Therefore, it is preferable to use a fragrance component having a specific gravity of 1 or more, such as benzyl salicylate or benzyl benzoate, as the specific gravity adjusting agent. Since these fragrance components have almost no odor, there is no function other than the specific gravity adjustment, and the fragrance quality is not affected. In addition, in the case where the volatile substance is not intended to volatilize and emit a fragrance, for example, in the case of a deodorizing action, an antibacterial / antifungal action, etc., the specific gravity adjusting agent itself has almost no odor. No material is preferred.

  In addition to the above components, a deodorant, an antifungal agent, an antibacterial agent, a fragrance volatilization aid, and the like can be added to the transparent gel fragrance composition of the present invention. In addition, antioxidants, preservatives, chelating agents, deodorizing components, and the like can be used to the extent that transparency is not impaired. Specific examples include 2,6-di-t-butyl-p-cresol as an antioxidant, methyl parabenzol, benzalkonium chloride, 1,2-benzisothiazolin-3-one as an antiseptic, EDTA, citrate as a chelating agent. Malic acid, plant extract, etc. can be mention | raise | lifted as a deodorizing component as an acid and a thickening stabilizer.

  In order to produce the transparent gel-like fragrance composition of the present invention, a gel base is prepared by uniformly heating and dissolving the above-mentioned gelling agent and, if necessary, necessary components in water, and then the perfume while stirring the gel base. A volatile substance such as lime is dropped, and the volatile substance is allowed to cool while being dispersed in the form of particles in the gel, thereby solidifying and gelling. At this time, since the volatile substance whose specific gravity is adjusted to a specific gravity of 1 or more, preferably approximately 1, can maintain a floating state in the gel base by stirring, the volatile substance is dispersed in the gel. Gelation progresses and hardens. Therefore, even if a surfactant is not used, the fragrance component, which is a volatile substance, is not contained in the gel formed with water and the gelling agent, and is dispersed in the form of droplets in the gel. A transparent gel fragrance is produced.

  Here, it is preferable to cool the volatile component to a sufficiently low temperature, for example, below the gel base solidification temperature, before adding it to the gel base. Thus, if a volatile substance such as a perfume is cooled to 0 ° C. or lower, only the periphery of the volatile substance is rapidly cooled and gelation proceeds, and the volatile substance is covered with the gel. The fragrance | flavor which is a sex substance is disperse | distributed in a gel base, maintaining a droplet form. Therefore, even when the gel base is left to cool while being stirred, the volatile substances are protected by the gel and do not break into small particles or partially volatilize, and the dispersion is performed better, so the transparency of the gel Is secured.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, an example of a transparent gel fragrance using gellan gum as a gelling agent is mainly described as a most preferable example, but even if other gelling agents are used, a surfactant is used. It is possible to prepare a gel fragrance without using. For example, although carrageenan gel is a thermoreversible gel, the preparation of the gel fragrance of the present invention is possible if the temperature at the time of production can be controlled (that is, the state in which droplets are uniformly dispersed can be maintained). When carrageenan gel is used, the viscosity is adjusted by adding locust bean gum, which may or may not be added.

  In this embodiment, volatile substances such as fragrances and essential oil components are directly added to the gel and dispersed in the form of droplets. However, depending on the case, some components or one and / or two types are dispersed. The above substances may be microencapsulated and dispersed. When a fragrance, essential oil, or the like is blended in a microencapsulated state, the fragrance is emitted later than the volatile substance dispersed in droplets, so that the scent sustainability can be improved.

(Preparation of gellan gel base)
0.1 parts by weight of methylparaben and 0.6 parts by weight of gellan gel (Kelcogel: manufactured by Kelco) are dispersed in 85.3 parts by weight of purified water and completely dissolved while stirring in a 95 ° C. hot water bath. After confirming complete dissolution, the temperature was lowered to 60-65 ° C. with stirring, and 4 parts by weight of a pre-prepared 1 w / w% calcium chloride aqueous solution was added little by little and mixed uniformly. Base. (Total prescription: 90.0 parts by weight)

(Adjustment of carrageenan gel base)
0.1 parts by weight of methylparaben, 1.5 parts by weight of carrageenan FR-6215 (Nitta Gelatin Co., Ltd.) and 0.3 parts by weight of locust bean gum (viscosity modifier) are dispersed in 3 parts by weight of propylene glycol. Next, 83.1 parts by weight of purified water is added and dispersed, and dissolved completely with stirring in a hot bath at 80 to 90 ° C. When it was confirmed that the solution was completely dissolved, the temperature was lowered to 60 to 65 ° C. in a stirring state to make a carrageenan base. (Prescription total: 88.0 parts by weight)

(Preparation of perfume formulation base)
2 parts by weight of fragrance (floral blended fragrance: Ogawa Fragrance Co., Ltd.), 0.698 parts by weight of benzyl salicylate (specific gravity adjuster), 0.002 parts by weight of oily dye, and 0.2 parts by weight of UV absorber are mixed and dissolved uniformly. Thus, a fragrance preparation base having a specific gravity of 1.004 or more was used. (Prescription total: 2.9 parts by weight)
Perfume (floral base) prescription Jasmine base 50
Garaxoride 50 BB 100
Headion (Filmenich) 100
Linalool 100
Lireal (Gibodan) 50
Phenylethyl alcohol 50
α-Damascon 1
Citronellol 20
Dihydromyrsenol 100
Muguet base 80
Lavender oil 30
Lemon oil 20
Benzyl salicylate 349

Total 1000

(Microcapsule adjustment)
Gelatin microcapsules having a diameter of 1 to 1.5 mm were prepared by the coacervation method using the above floral blended fragrance.

  Tables 1 and 2 below show gel-based formulations and perfume formulation-based formulations.

Example 1
90 parts by weight of the previously prepared gellan gel base is placed in a glass beaker, and 7.1 parts by weight of purified water is added little by little while stirring with a magnetic stirrer. Next, the fragrance preparation base is added little by little into the gellan gel base, and a stirrer is prepared at a rotational speed such that droplets having a diameter of about 1 to 3 mm are uniformly dispersed. A digital thermometer is set and the mixture is left with stirring until the gel temperature reaches 30 ° C. ± 2 ° C. When the temperature reaches 30 ° C. ± 2 ° C., the stirring is temporarily stopped and the sedimentation state of the droplet is confirmed, and the stirring operation is continued until the entire droplet is floated.
Immediately after the oil droplets were completely suspended, the container was filled and a transparent gel-like fragrance composition 1 in which the fragrance (droplets) was uniformly suspended was obtained.

Example 2
Fragrance (droplet) by the same operation as in Example 1 using gellan gel base in which 1 w / w% calcium chloride aqueous solution was changed to 1 w / w% calcium lactate aqueous solution and fragrance preparation base in which benzyl salicylate was changed to benzyl benzoate A transparent gel-like composition 2 in which was uniformly suspended was obtained.

Example 3
90 parts by weight of the previously prepared gellan gel base is placed in a glass beaker, and 7.1 parts by weight of purified water is added little by little while stirring with a magnetic stirrer. Next, a perfume formulation base that has been cooled to −15 ° C. ± 2 ° C. or less in advance is added little by little to the gellan gel base, and a stirrer is prepared at a rotational speed that allows the droplets to be uniformly dispersed. A digital thermometer is set and the mixture is left with stirring until the gel temperature reaches 30 ° C. ± 2 ° C. When the temperature reaches 30 ° C. ± 2 ° C., the stirring is temporarily stopped and the sedimentation state of the droplet is confirmed, and the stirring operation is continued until the entire droplet is floated.
When the oil droplets were completely suspended, the container was immediately filled, and a transparent gel-like fragrance composition 3 in which the fragrance (droplets) was larger than Example 1 and evenly floated was obtained.

Comparative Example 1
90 parts by weight of the previously prepared gellan gel base is placed in a glass beaker and stirred with a magnetic stirrer. In advance, 2.9 parts by weight of a perfume preparation base, 4.0 parts by weight of Nikkor HCO-60 (surfactant manufactured by Nikko Chemicals) and 1.0 part by weight of Nikkor TL-10 (surfactant manufactured by Nikko Chemicals), ethanol 2 Add 1 part by weight and stir well to completely solubilize, add little by little into the gellan gel base, stir uniformly, and then fill the container to obtain a transparent gel-like fragrance composition 4 .

Comparative Example 2
90 parts by weight of the previously prepared gellan gel base is placed in a glass beaker and stirred with a magnetic stirrer. In advance, 2.9 parts by weight of a fragrance preparation base was mixed with 7.0 parts by weight of an aqueous solution of PVA205 (manufactured by Kuraray Co., Ltd.) adjusted to a concentration of 5% by weight of Nikkor HCO-60 (surfactant manufactured by Nikko Chemicals). In addition, the mixture was well agitated and completely emulsified, added little by little into the gellan gel base, stirred uniformly, and then filled into a container to obtain a milky white gel-like fragrance composition 5.

Comparative Example 3
88.0 parts by weight of the previously prepared carrageenan gel base is placed in a glass beaker and stirred with a magnetic stirrer. In advance, 2.9 parts by weight of a perfume formulation base was mixed with 0.1 part by weight of Nikkor HCO-60 (surfactant manufactured by Nikko Chemicals) and 9.0 parts by weight of an aqueous solution of PVA205 (manufactured by Kuraray) adjusted to a concentration of 5%. In addition, the mixture was well agitated and completely emulsified, added little by little into the previous carrageenan gel base, uniformly stirred and then filled into a container to obtain a milky white gel-like fragrance composition 6.

Comparative Example 4
90 parts by weight of the previously prepared gellan gel base is placed in a glass beaker and stirred with a magnetic stirrer. In advance, 2.9 parts by weight of a perfume preparation base, 4.0 parts by weight of Nikkor HCO-60 (surfactant manufactured by Nikko Chemicals) and 1.0 part by weight of Nikkor TL-10 (surfactant manufactured by Nikko Chemicals), ethanol 2 Add 1 part by weight and stir well to completely solubilize and add in small portions to the previous gellan gel base. Furthermore, 1.0 g of microcapsules containing a floral blending fragrance is added, a stirring digital thermometer is set, and the mixture is left with stirring until the gel temperature reaches 30 ° C. ± 2 ° C.
When the temperature reaches 30 ° C. ± 2 ° C., the stirring is temporarily stopped, the sedimentation state of the microcapsules is confirmed, and the operation is continued until the whole oil droplet is floated.
As soon as the microcapsules were completely suspended, stirring was continued while heating in a 60 ° C. warm bath to stop the progress of gelation, and a transparent gel-like fragrance composition 7 filled in the container and having the microcapsules uniformly suspended was obtained.

Comparative Example 5
90 parts by weight of the previously prepared gellan gel base is placed in a glass beaker, and 7.1 parts by weight of purified water is added little by little while stirring with a magnetic stirrer. Subsequently, 1.0 g of microcapsules containing a floral blending fragrance was added, and a transparent gel-like fragrance composition 8 in which the microcapsules were uniformly suspended was obtained in the same manner as in Comparative Example 4.

Comparative Example 6
88.0 parts by weight of the previously prepared carrageenan gel base is placed in a glass beaker and stirred with a magnetic stirrer. In advance, 2.9 parts by weight of a perfume formulation base with 5.1 parts by weight of Nikkor HCO-60 (surfactant manufactured by Nikko Chemicals), 1.0 of Nikkor TL-10 (surfactant manufactured by Nikko Chemicals), and ethanol 3. 0 parts by weight was added and stirred well to completely solubilize, added little by little into the previous carrageenan gel base, uniformly stirred and then filled into a container to obtain a transparent gel-like fragrance composition 9.

1. Sensory evaluation The fragrance in the space in the sensory evaluation box (90 cm × 90 cm × 200 cm) was evaluated.
(Evaluation item)
7-level titer evaluation by sensory evaluation Very strong (7) to very weak (1)
(Rater)
6 professional panelists belonging to Ogawa Fragrance Co., Ltd. (evaluation sample)
80 g of a PP cup with a diameter (opening) of 10 cm and a volume of 100 ml of the gel-like fragrance composition of Examples 1 to 3 and Comparative Examples 1 to 5 (evaluation method)
The evaluation sample is placed in the sensory evaluation box and left for 15 minutes. Thereafter, a 7-level titer evaluation was performed by an evaluator.

この官能評価結果から、実施例１〜３については、イニシャル時から２１日経過時までの間に力価（匂いの強さ）に大きな変化がなく、当初から匂い立ちが強くそれが持続されていることが判明した。これに対し、比較例１並びに２の乳化ゲルについては、初日の力価はむしろ本発明の実施例１並びに２の油滴ゲルよりも強いぐらいであるが、その後力価が弱まり、２１日経過時にはほぼ半減している。また、１４日経過時には、実施例１並びに２の油滴ゲルに比べて大きく力価の低下が認められる。比較例３の乳化ゲルは１４日経過後から急激に力価の低下が見られる。比較例４の透明ゲルに香料とマイクロカプセルを併用したゲルについては、当初の匂い立ちは悪いが（力価が弱い）時間が経過してもその力価は持続することが認められる。またマイクロカプセルにのみ香料を封入した比較例５のゲルの場合には、初日の匂い立ちは非常に悪が、時間の経過とともに、徐々に匂い立ちが悪いながらも、イニシャル時よりは良くなることが認められる。香料をマイクロカプセルに封入するゲルの場合、界面活性剤を使用しなくとも透明ゲルを得ることができるが、マイクロカプセルからの香料揮発・蒸散が比較的遅い事から芳香剤としてはやや不向きである。

From these sensory evaluation results, in Examples 1 to 3, there was no significant change in the titer (intensity of odor) between the initial time and 21 days, and the odor was strong and sustained from the beginning. Turned out to be. In contrast, for the emulsified gels of Comparative Examples 1 and 2, the titer on the first day was rather stronger than the oil droplet gels of Examples 1 and 2 of the present invention, but the titer was weakened after that, and 21 days had elapsed. Sometimes it is almost halved. Further, when 14 days have passed, a significant decrease in the titer is recognized as compared with the oil droplet gels of Examples 1 and 2. The emulsified gel of Comparative Example 3 shows a sharp decrease in titer after 14 days. As for the gel obtained by using the fragrance and the microcapsule in combination with the transparent gel of Comparative Example 4, the initial smell is poor (weak titer), but it is recognized that the titer persists even after a lapse of time. In addition, in the case of the gel of Comparative Example 5 in which the fragrance is sealed only in the microcapsule, the smell on the first day is very bad, but it gradually becomes worse as time passes, but it becomes better than the initial time. Is recognized. In the case of a gel in which a fragrance is encapsulated in a microcapsule, a transparent gel can be obtained without using a surfactant, but the fragrance volatilization and transpiration from the microcapsule is relatively slow, so it is somewhat unsuitable as a fragrance. .

2. Stability evaluation (evaluation conditions)
A. Temperature stability: 70 ° C., left at −15 ° C. constant temperature bath for 7 days Light stability: 21 days under fluorescent light irradiation (* 1)
Left for 7 days after xenon irradiation (* 2)
* 1 Fluorescent lamp irradiation conditions Stand still under three-surface irradiation (15 fluorescent lamps)
* 2 Xenon irradiation conditions: Stand still 10 to 20 cm away from 60,000 to 80,000 lux light source (Evaluation item)
Appearance evaluation (visual) when room temperature storage products and dark storage products are standard

この安定性評価では、代表的なゲル、即ち実施例１の油滴ゲル、比較例２の乳化ゲル（ジェラン）及び比較例３の乳化ゲル（カラギーナン）について行った。温度虐待評価結果は、本発明の油滴ゲルは７０℃並びに−１５℃の双方において良好な結果が得られたが、比較例２並びに３の乳化ゲルはいずれか一方の温度条件においてゲル化不良や香料成分の沈殿が起きた。また、光虐待評価については、本発明の油滴ゲルはキセノン照射並びに蛍光灯照射の双方においてほぼ透明度が維持できる良好な結果が得られたが、比較例２並びに３の乳化ゲルはいずれか一方の照射条件において退色と着色が認められた。尚、比較例３〜５の安定性試験は油滴ゲルとほぼ同様の挙動を示した。

In this stability evaluation, representative gels, that is, oil drop gel of Example 1, emulsified gel of Comparative Example 2 (gellan), and emulsified gel of Comparative Example 3 (carrageenan) were performed. The results of temperature abuse evaluation showed that the oil droplet gel of the present invention showed good results at both 70 ° C. and −15 ° C., but the emulsified gels of Comparative Examples 2 and 3 had poor gelation under either temperature condition. And fragrance ingredients were precipitated. In addition, for the light abuse evaluation, the oil drop gel of the present invention was able to maintain almost the transparency in both xenon irradiation and fluorescent lamp irradiation, but either of the emulsified gels of Comparative Examples 2 and 3 Under the irradiation conditions, fading and coloring were observed. In addition, the stability test of Comparative Examples 3 to 5 showed almost the same behavior as the oil droplet gel.

3. Residue test Oil drop gel of Example 1 (gel-like aroma composition 1), transparent carrageenan gel of comparative example 6 (irreversible gel: gel-like aroma composition 9), transparent gellan gel of comparative example 1 (reversible gel: The residue at the time of one month transpiration by 3 points of the gel-like fragrance composition 4) was compared. In the test, the residue after 80 g of the above three samples were put in a container and evaporated at room temperature for 1 month was measured. The results are shown in Table 7. From this test result, it became clear that the gel-like fragrance composition 1 according to Example 1 of the present invention has the least residue. This test result shows that the larger the amount of surfactant used, the greater the amount of residue. Moreover, the total transpiration | evaporation amount of the fragrance | flavor about the oil drop gel (gel-like aroma composition 1) of Example 1, the emulsification gel (gellan) of the comparative example 2, and the emulsification gel (carrageenan) of the comparative example 3, and the change of the transpiration | evaporation amount Is shown in FIG. From this, it is clear that the amount of residue of the oil droplet gel is remarkably caused by the presence or absence of the surfactant, but the influence of the raw material (PVA205) used for the emulsion stability is not a little. It is recognized that

４．ゲル透明性
実施例１〜３の油滴ゲルにおいては、界面活性剤を使用しなくとも透明ゲルが得られた。一方、比較例１，４及び６のゲルのように大量の界面活性剤を添加したり比較例５のように香料をゲルに入れずにマイクロカプセルに封入して添加する場合には透明ゲルが得られた。

4). Gel transparency In the oil droplet gels of Examples 1 to 3, a transparent gel was obtained without using a surfactant. On the other hand, when a large amount of a surfactant is added as in the gels of Comparative Examples 1, 4 and 6, or a perfume is added in a microcapsule without being added to the gel as in Comparative Example 5, a transparent gel is used. Obtained.

It is a perspective view which shows one Embodiment of the gel air freshener concerning this invention. It is a graph which shows the amount transpiration | evaporation amount change of a gel fragrance | flavor.

Explanation of symbols

1 Gel 2 Grain of volatile substance 3 Container

Claims (6)

A gel fragrance comprising a gel comprising water and a water-soluble gelling agent not containing a surfactant, and a volatile substance having a specific gravity adjusted to a specific gravity of 1 or more and dispersed in droplets in the gel. The gel fragrance according to claim 1, wherein the microencapsulated volatile substance is further dispersed. The gel fragrance according to claim 1 or 2, wherein a fragrance component having a specific gravity of 1 or more is used as a specific gravity adjusting agent for adjusting the specific gravity of the volatile substance. The gel fragrance according to claim 3 , wherein the perfume component as the specific gravity adjusting agent is benzyl salicylate or benzyl benzoate. A method of manufacturing a gel fragrance according to claim 1, in water to dissolve the water-soluble gelling agent without the addition of a surfactant stirring to prepare a gel base while stirring the gel base said A method for producing a gel fragrance, comprising: dropping a volatile substance having a specific gravity adjusted to a specific gravity of 1 or more into a gel base, dispersing the volatile substance in the form of droplets in the gel, and then solidifying the volatile substance. The method for producing a gel fragrance according to claim 5, wherein the volatile substance is cooled to 0 ° C or lower before being added to the gel base.

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