JPH0560387B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a water gel fragrance composition suitable for removing bad odors or adding a pleasant scent to a room.

More specifically, the present invention relates to a water gel fragrance characterized by using dipropylene glycol alkyl ether and/or propylene glycol alkyl ether as a fragrance volatility regulator and a water gel stabilizer.

(b) Prior Art Conventionally, proposals have been made regarding water gel fragrances using water as a carrier, such as carrageenan as a gelling agent, agar, a polyamine reaction product of isobutylene maleic anhydride copolymer with ammonia adduct, etc. For example, locust bean gum, xanthan gum, polyvinyl alcohol, carboxymethyl cellulose, hydroxy lower alkyl cellulose, methyl cellulose,
A proposal is known for a water gel air freshener containing a specific proportion of water-soluble polyethylene oxide, starch glycolate, etc. (Japanese Patent Publication No. 47-36630).

Another proposal is to use 3-methyl-3-methoxybutanol as a volatility regulator for the fragrance of water gel fragrances, use the same gelling agent as the above conventional proposal, and use, for example, polyester as an emulsifier. A known improvement proposal is to mix oxyethylene hydrogenated castor oil, polyoxyethylene alkyl phenyl ether, etc. in specific proportions to maintain a certain balance in the fragrance tone over a long period of time, and to impart diffusibility and sustainability. (Japanese Patent Publication No. 13507/1983).

(c) Problems to be Solved by the Invention In the above-mentioned conventionally proposed water gel fragrance of Japanese Patent Publication No. 47-36630, the water used as the carrier has an extremely fast volatilization rate, so the low-boiling point fragrance ingredients are absorbed into the water. It is difficult to maintain a constant balance for a long period of time because the fragrance composition tends to change due to volatilization and the balance of the fragrance is lost.

In addition, in the latter proposed improvement proposal using 3-methyl-3-methoxybutanol as a volatilization regulator for the fragrance of a water gel fragrance, a phenomenon in which the used water separates from the water gel fragrance, a so-called syneresis phenomenon, has been reported. This causes the gel to lose its shape, and at the same time as water syneresis occurs, the water-soluble fragrance comes out on the surface of the gel, which disrupts the balance of ingredients in the fragrance composition, making it impossible to maintain the volatilization and sustainability of the fragrance in a constant balance for a long period of time. There are drawbacks.

(d) Means for Solving the Problems In order to solve the above-mentioned disadvantages and shortcomings, the present inventors have developed a water gel fragrance composition that prevents syneresis and provides an appropriate volatility and persistence of the fragrance. We have been conducting intensive research on stabilizers that can maintain properties. As a result, by incorporating dipropylene glycol alkyl ether and/or propylene glycol alkyl ether, which are easily and inexpensively available on the market, into a water gel fragrance composition, the component balance of the fragrance can be maintained constant over a long period of time. It has been discovered that it is possible to obtain a stable water gel aroma composition that can impart diffusibility and sustainability, has excellent syneresis stability, and does not lose its shape.

Therefore, the object of the present invention is to provide a water gel fragrance composition that does not have the disadvantages or drawbacks of these prior art techniques. That is, according to the present invention, in addition to the advantages of having an appropriate volatility sustainability that allows stable use as an indoor air freshener over a long period of time and not having a negative effect on fragrances, it also has water syneresis. It is possible to provide a water gel aroma composition that can stably maintain a gel shape without causing any phenomena.

The water gel fragrance of the present invention comprises 0.1-40% by weight of dipropylene glycol alkyl ether and/or propylene glycol alkyl ether, 0.1-15% by weight of gelling agent, 0.1-30% by weight of fragrance, and 50-50% by weight of water.
Consisting of 95% by weight.

Examples of the dipropylene glycol alkyl ether and propylene glycol alkyl ether used as the stabilizer in the present invention include propylene glycol methyl or ethyl ether, dipropylene glycol methyl or ethyl ether, and the like. These ethers do not necessarily have to be of high purity, and those with a purity level that is generally sold as an industrial product can be used. These ethers can be dissolved in any ratio with water, so there is no particular restriction on the mixing ratio, and it can be selected as appropriate, but based on the weight of the water gel aroma composition, approximately 0.1
A range of ~40% by weight, more preferably about 0.5~
A range of about 30% by weight can be exemplified. Outside this range, if the amount is too small, the effect of regulating aroma volatilization will be reduced, and if the amount is too large, the stability of the water gel will deteriorate and syneresis will occur.

A solvent such as ethylene glycol monoethyl ether, hexylene glycol, propylene glycol, diethylene glycol monoethyl ether, propylene glycol monomethyl acetate, etc. can also be used in combination with the above stabilizer. There are no particular restrictions on the type and amount of these solvents used, and they can be appropriately selected depending on the purpose.

Examples of the gelling agent used in the present invention include agar, carrageenan, and a polyamine reaction product of isobutylene maleic anhydride copolymer with ammonia, which are easily available on the market. The blending ratio of these is approximately 0.1 to 15% by weight based on the weight of the water gel aroma composition.
range of degrees, more preferably about 0.5-10% by weight
Can be used to a certain degree. If the amount is too small outside the above range, it will be difficult to form a gel, and if it is too large, the gel will become hard and the aroma will not evaporate easily.

Moreover, an emulsifier can also be used as a dispersant for perfume. Examples of suitable emulsifiers include, for example:
Surfactants such as polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene stearate, and the like can be used. There is no particular restriction on the blending ratio, and it may be selected as appropriate.

Furthermore, examples of the fragrance used in the present invention include conventionally known fragrances, such as synthetic fragrances and natural fragrances.

Examples of the above synthetic fragrances include α-pinene, β-pinene, camphene, limonene, terpinolene, p-cymene, β-caryophyllene,
Terpene hydrocarbons such as myrcene; cis-3-hexenol, 1-octen-3-ol, 2,6-nonadien-1-ol, 1-hepten-3-ol, 1-hexen-3-ol, etc. Aliphatic alcohols such as; esters of these alcohols; linalool, geraniol,
Terpene alcohols such as nerol, citronellol, rhodinol, hydroxycitronellol, myrcenol, terpinol, menthol, borneol, falnesol, nerolidol, cedrol, santalol; esters of these alcohols; benzyl alcohol, phenylethyl alcohol, cinnamyl Aromatic alcohols such as alcohol, anise alcohol, α-amylcinnamyl alcohol; esters of these alcohols; anisole, anethole,
Eugenol, safrole, β-naphthol methyl ether, undecyl aldehyde, citral, citronellal, hydroxycitronellal, cinnamyl aldehyde, anisaldehyde,
Aliphatic aldehydes such as heliotropin, cyclamen aldehyde, vanillin, terpene aldehydes; phenols; acetals of these aldehydes; methyl nonyl ketone, methyl heptenone, 1-carvone, menthone, cypress, acetophenone, ionone, Aliphatic ketones such as irone, diasmone, methylnaphthylketone, methylionone, methyldihydrdiasmonate; terpene ketones; cyclic ketones; ketanols of these ketones; cyclopentadecanolide, cyclopentadecanone, ethylene Examples include musk compounds such as brachyrate, musk ketone, and 12-oxahexadecanolide.

Examples of natural fragrances include bergamot oil, bois de rose oil, cananga oil, cassia oil, cardamom oil, cedar oil, cinnamon oil, citronella oil, clove oil, eucalyptus oil, geranium oil, diasmine oil, and hiba oil. Examples include oil, lavandin oil, lavender oil, lime oil, lemon oil, neroli oil, orange oil, patch lily oil, petitgrain oil, pine oil, sandalwood oil, turpentine oil, and ylang-ylang oil. These synthetic fragrances and natural fragrances can be used alone or in combination of multiple types as appropriate.

The amount of these fragrances to be used is, for example, about 0.1 to 30% by weight, more preferably about 0.5 to 20% by weight, based on the water gel aroma composition.

The water gel aroma composition of the present invention can generally be produced as follows.

For example, put a gelling agent and water in a suitable container and heat to dissolve. After dissolving, add a mixture of ether (e.g. dipropylene glycol methyl ether), fragrance and optionally surfactant;
Distribute evenly. After dispersion, it is filled into a suitable container and cooled to gel. Although the cooling temperature is not particularly limited, it is usually fixed by being left in a range of around room temperature.

Several examples of formulations of preferred blended fragrances that can be used in the present invention are shown below.

Lemon-based blended fragrance ingredients Weight% Lemon oil 70 Linalool 5 Nonanal 1 Decanal 4 Citronellal 5 Citral 10 Citronellol 5 Total 100 Diyasmine-based blended fragrance ingredients Weight% Benzyl acetate 40 Benzyl propionate 15 Benzyl alcohol 10 Linalool 18 Linalyl acetate 5 Indole 10 (10% dipropylene glycol solution)
3 Dihydrodiasmonate 5 Dihydrodiasmonate 2 Methyl anthranilate (10% dipropylene glycol solution) 2 Total 100 Orange-based mixed fragrance ingredient Weight % Orange oil 70 Octanal 5 Nonanal 1 Decanal 8 Citronellal 5 Methylheptenone 4 Citral 7 Total 100 Hereinafter, embodiments of the present invention will be described in more detail by giving Examples.

(e) Example (1) Component (g) 1 Carrageenan 2 2 Locust bean gum 0.2 3 Dipropylene glycol methyl ether 10 4 Lemon-based blended fragrance 10 5 Emulsifier 1 6 Non-ionized water 76.8 Put the above 1, 2 and 6 into a flask. 80°~
Heat to 85℃ to dissolve. After melting, reduce the temperature to 65°
Cool to ~70°, add 3, 4, and 5 above and disperse uniformly. After dispersion, it is filled into an aromatic container and left to cool to gel.

This water gel fragrance composition was left at room temperature for 30 days, and the amount of reduction in the blended fragrance used was measured. As a result, approximately 60% of the material evaporated within 30 days. Furthermore, the volatilization rate of the blended fragrance was measured on the 45th day under the same conditions, and the volatilization rate was 91% by weight.

During this period, the aroma of the lemon-based blend maintained its initial aroma balance and hardly changed.

Stability tests were also conducted at high temperatures (40°C) and low temperatures (-10°C), but no phenomena such as syneresis or deformation were observed, and the product remained in a stable gel-like state.

(2) Ingredients (g) 1 Agar 2 2 Xanthan gum 0.2 3 Propylene glycol methyl ether 30 4 Diyasmine-based mixed fragrance 10 5 Emulsifier 5 6 Non-ionized water 52.8 Place 1, 2 and 6 above in a flask and heat at 80℃~
Heat and dissolve at 85℃. After dissolving, increase the temperature to 65℃~
Cool to 70°C, then add 3, 4 and 5 and disperse uniformly. After dispersion, it is filled into an aromatic container and left to cool to gel.

The obtained water gel fragrance composition was left at room temperature for 30 days, and the amount of reduction in the blended fragrance used was measured. As a result, the volatilization rate after 30 days was about 65% by weight. Further, the volatilization rate after 45 days was approximately 93% by weight, and the aroma balance was almost the same as at the beginning, with appropriate volatilization and sustainability.

In addition, stability tests were conducted at high temperatures (40°C) and low temperatures (-10°C), but no phenomena such as syneresis or deformation were observed.

(3) A water gel aroma composition was prepared in the same manner as in Example 1 except that dipropylene glycol ethyl ether was used instead of dipropylene glycol methyl ether.

When this water gel aroma composition was left at room temperature for 30 days, about 58% by weight was volatilized, and the final volatilization rate was 88% by weight in 45 days.

This fragrance maintained its aroma balance throughout the period. Also, high temperature (40℃) and low temperature (-10℃)
A stability test was carried out at temperatures (°C) and it was found to be a stable gel.

(f) Effect In the water gel aroma composition of the present invention, by using dipropylene glycol alkyl ether and/or propylene glycol alkyl ether as a solvent and a fragrance volatile agent, troubles such as deformation and syneresis phenomenon do not occur, and It is possible to provide a stable water gel aroma composition that has not been previously available with this type of composition. Moreover, the aroma balance can be maintained over a long period of time and the aroma can be stably volatilized.

Claims (1)

[Scope of Claims] 1 (a) 0.1 to 40% by weight of at least one stabilizer selected from the group consisting of dipropylene glycol alkyl ether and propylene glycol alkyl ether; (b) carrageenan, agar, and isobutylene maleic anhydride; At least one gelling agent selected from the group consisting of polyamine reactants of polymer-ammonia adducts from 0.1 to 15% by weight, (c) fragrance from 0.1 to 30% by weight, and (d) water from 50 to 95% by weight. An aqueous gel aroma composition. 2. The composition according to claim 1, wherein the stabilizer (a) is at least one member selected from the group consisting of dipropylene glycol methyl ether, dibropylene glycol ethyl ether, propylene glycol methyl ether, and propylene glycol ethyl ether. thing.