JPS62249652A - Gel like aroma composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a gel fragrance composition, more specifically, a gel fragrance composition using a specific paraffinic hydrocarbon as a carrier for fragrance volatilization, and a styrene-butadiene-styrene block combination. A transparent and beautiful gel formed using a polymer as a gelling agent.As the fragrance evaporates, the volume of the gel decreases while maintaining a transparent and beautiful state, and the fragrance is stable in terms of volatilization. The present invention relates to a drug composition.

[Conventional technology]

Gels used in gel fragrance compositions are broadly classified into aqueous gels and oil-based gels.

Gelling agents mainly used in water-based aqueous gels include natural products such as agar, carrageenan, and pectin, and synthetic products that use water-insoluble superabsorbent resins. (Japanese Unexamined Patent Publication No. 58-138461) and water-soluble polymer (Unexamined Japanese Patent Publication No. 55-81655)
etc.

However, such aqueous gels have several drawbacks. 1
First, when a perfume is emulsified and dispersed in an aqueous gel, the stability is extremely poor depending on the type of perfume, and there is a problem in that the fragrance tone changes or the generation of off-flavors occurs during long-term storage.

In order to solve this problem, we have proposed methods such as not using single fragrances that are unstable in aqueous gels (ester-based fragrances such as linalyl acetate, benzyl acetate, etc., or aldehyde-based fragrances such as cyclamen aldehyde). However, the above fragrances serve as the base for mixed fragrances, and it is difficult to obtain a highly palatable prepared fragrance without the above fragrances.Therefore, in order to compensate for this drawback, alkaline earth benzoate is added to the above fragrances. Although methods have been proposed such as adding hydrotropes such as salts (Japanese Patent Application Laid-Open No. 15438/1982), adding specific phosphates or carbonates, and further adjusting the pH, It is inevitable that the formulation and manufacturing method will become complicated. Another disadvantage of aqueous gels that carry fragrances is that water evaporates more easily than most fragrances, so the balance between the amount of fragrance and water evaporates is quickly disrupted, and the fragrance maintains a stable fragrance tone and intensity. This is difficult.

In addition, oil-based gels are relatively easy to overcome the drawbacks of water-based gels, and have many advantages over water-based gels as gels for forming gel-like fragrance compositions, but they have many advantages in terms of fragrance selection and appearance. It has the following problems.

As a gelling agent for oil-based gel using oil and fat as a medium,
Sodium stearate (JP 55-141243), metal soap (JP 56-89261), dibenzylidene sorbitol (JP 60-41967), fine powder silica (JP 54-92630) and N-acylamino acid derivatives (Japanese Unexamined Patent Publication No. 1913.9/1989), etc. However, the oil-based gel formed using sodium stearate and finely powdered silica does not have sufficient gel strength (it is opaque and In addition, it is easy to crack and is unfavorable in appearance.When using metal soap, the amount added during gel formation is as large as 201% by weight or more, and the selection range of fragrances that can form a transparent gel is narrow.

When dibenzylidene sorbitol is used, the carrier is a solvent having an SP value of less than about 8.7, such as limonene oil,
Hydrocarbon solvents such as paraffin oil do not form gels, so ethanol or the like must be used as the main solvent, which also poses problems in volatilization control. When using N-acylamino acid derivatives, a solvent (carrier) that can obtain a transparent gel
However, among hydrocarbon solvents, this is limited to terpene solvents, and with paraffin solvents, the gel becomes opaque due to aging.

Furthermore, since terpene-based solvents themselves have a strong odor, the use of terpene-based solvents has the disadvantage that the aroma tone that can be obtained is limited.

Further, a sustained release fragrance composition using thermoplastic rubber is described in JP-A-50-129755, and the publication describes the use of an SBS copolymer in the above fragrance composition. However, the above fragrance composition uses SBS copolymer as a thermoplastic rubber, and is a solid fragrance composition made by kneading a thermoplastic rubber with a plasticizer, a stabilizer, and a fragrance, and is not a gel fragrance. The volume is not constant, and the volume does not decrease uniformly with volatilization.

[Means to solve the problem]

The present inventors have aimed to provide a gel-forming fragrance composition that maintains a transparent and beautiful gel state until the end of perfume dispersion, has stable volatilization of perfume, and has gel strength that is resistant to impact. As a result of various studies, we found that a specific amount of paraffinic hydrocarbon, which is liquid and volatile at room temperature, was used as a carrier for perfume volatilization, and a styrene-butadiene-styrene block copolymer (SBS copolymer) was used as a gelling agent. It has been found that the above object can be achieved by using a specific amount of.

The present invention has been made based on the above findings, and is based on the above findings.
, styrene-butadiene-styrene blank copolymer 2
The present invention provides a gel-like fragrance composition consisting of ~30% by weight and 0.5-30% by weight of fragrance.

The gel-forming fragrance composition of the present invention will be described in detail below.

The paraffinic hydrocarbon that is liquid and volatile at room temperature in the gel fragrance composition of the present invention is a carrier (dispersion medium) for the fragrance.
The paraffinic hydrocarbons have approximately 8 to 16 carbon atoms and an SP value of 6.5 to 8.
It is preferably about 0, with a vapor pressure of 1 to 20 at 25°C.
The paraffinic hydrocarbon is particularly preferably about mmHg, and the blending amount is 50 to 90% by weight, preferably 70% by weight.
~85% by weight.

In addition, the SBS copolymer in the gel-forming fragrance composition of the present invention is used as a gelling agent for the paraffinic hydrocarbon on which a fragrance is supported (dispersed). /butadiene ratio is 10/90
A side chain or linear copolymer with a ratio of about 40/60 to about 40/60 and containing no plasticizer is preferred, and a side chain copolymer with a styrene/butadiene ratio of about 25/75 to 35/65 is particularly preferred. The blending amount of this SBS copolymer is 2 to 30
% by weight, preferably 8-20% by weight.

If the 5BS-#I-fi combined content is less than 2% by weight, especially less than 1%, the gel strength will be insufficient, and if it exceeds 30%, gelation will occur, but perfume volatilization will worsen and residue will increase, resulting in the desired gel-like fragrance. It becomes difficult to obtain the composition.

In addition, the fragrance used in the gel-like fragrance composition of the present invention must be a fragrance that dissolves in the above-mentioned paraffinic hydrocarbon in order to obtain a transparent gel. is not particularly limited, but a blended flavor using a single flavor with an SP value of 10 or less is preferred, and a blended flavor using a single flavor with an SP value of 9.5 or less is particularly preferred.

However, even in a blended fragrance using a single fragrance with an SP value of 10 or more, if the proportion of the single fragrance with an SP (*10 or more) in the blended fragrance is 50M% or less, more preferably 30% by weight or less, it will not completely enter the system. Since it is solubilized and a completely transparent gel is obtained, it is possible to prepare a blended fragrance that can be dissolved in the above paraffin hydrocarbon depending on the desired fragrance tone etc. The blending amount of the above fragrance is 0.5 ~30% by weight, preferably 5 to 20% by weight; less than 0.5% by weight causes a weak fragrance, and more than 30% by weight leads to a decrease in gel strength;
It becomes difficult to obtain the desired gel-like fragrance composition.

As mentioned above, the gel fragrance composition of the present invention can achieve the intended purpose by using the above paraffinic hydrocarbon as a fragrance carrier and an SBS copolymer as a gelling agent. When paraffinic hydrocarbons are not blended, the volume of the gel decreases as the fragrance evaporates, which is one of the important advantages of the gel fragrance composition of the present invention, and the end point is clearly visible. Characteristics are lost.

That is, for example, when 90% by weight of fragrance is gelled using 10% by weight of SBS copolymer, it becomes a viscous liquid and does not gel. For example, 20% by weight of fragrance, SBS
When gelatinized with 80% by weight of the copolymer, it solidifies, but the volatilization rate is less than 20% by weight, and the volume decreases only slightly. Furthermore, when using something other than the above-mentioned paraffinic hydrocarbons as a fragrance carrier, and when using a conventional gelling agent other than the 5BSP:5 combination as a gelling agent, the problems of the conventional methods cannot be solved, and this problem cannot be solved. The purpose of the invention cannot be achieved.

In addition, in the gel-like fragrance composition of the present invention, the effect that the fragrance is uniformly volatilized and the strength and tone of the fragrance do not change until the end is achieved because of the fragrance and the paraffin as its carrier. It is recognized that interaction with hydrocarbons also contributes.

The above-mentioned gel fragrance composition of the present invention can be easily obtained as follows.

That is, 50 to 90% by weight of the liquid paraffinic hydrocarbon
, SBS copolymer 2-30% by weight and fragrance 0.5-30%
The mixture of % by weight was heated and stirred at 100°C or less, and 5BS-
111-When the polymer is sufficiently dissolved and becomes transparent, each liquid can be transferred to a suitable container and left to cool, or put into molds of various shapes and taken out from the mold after cooling. A gel fragrance composition of the present invention which is a transparent gel is obtained. In addition, since the above-mentioned mixed liquid quickly gels when cooled to 60° C. or lower, the gel-like fragrance composition of the present invention can be easily obtained in a short period of time. By doing so, it is also possible to obtain a colored transparent gel-like fragrance composition.

〔Example〕

Example 1 Fragrance (floral mixed fragrance) 10% by weight isoparaffinic hydrocarbon (80% by weight containing 12 carbon atoms, IP Solgent 1620, Idemitsu Petrochemical) 80% by weight SBS copolymer (styrene/butadiene) Ratio = 30/70, Califlex TR1184, Shell Chemical) 10% by weight The above raw materials were mixed, the mixture was stirred at 100°C for about 1 hour, and SBS
When the copolymer is completely dissolved, the diameter is 6c11 and the height is 3.
The mixture was poured into a cylindrical transparent container made of As and left to cool at room temperature to obtain a transparent and beautiful gel-like fragrance composition (product of the present invention). This gel-like fragrance composition was also elastic and highly resistant to impact.

A gel fragrance composition (control product) was obtained in exactly the same manner as in the above example except for the above.

Oral changes in aroma tone, aroma intensity, and transparency were investigated for the above-mentioned products of the present invention and the above-mentioned control products. The results are shown in the first section below.
Shown in the table.

Table 1 *l: The strength of the scent was weakened.

*2: The strength of the scent was significantly weakened.

*3: Opaque In the above table, the upper row of each column for scent tone, scent strength, and transparency shows the results for the product of the present invention, and the lower row shows the results for the control product.

Further, a volatilization test was conducted at 20° C. for the above-mentioned present invention and the above-mentioned control product. The results are shown in FIG.

From the results shown in Table 1 above, it can be seen that the products of the present invention show no oral changes in any of the fragrance tone, fragrance intensity, and transparency. Moreover, from the results shown in FIG. 1, it can be seen that the product of the present invention exhibits stable volatilization of fragrance.

Furthermore, when we observed changes in appearance (changes in shape) due to the volatilization of perfume between the products of the present invention and the control products, we found that the products of the present invention decreased in volume uniformly and produced only a small amount of residue, but
The control product decreased in volume unevenly and wrinkled in the middle, giving an unsightly appearance and producing a large amount of residue.

Furthermore, when we investigated the storage stability of the product of the present invention, we found that -
No change occurred after storage at 5-50°C for 2 months.

Example 2 The isoparaffinic hydrocarbon used in Example 1 above was replaced with normal paraffinic hydrocarbon (Neothiosol LC
A gel-like fragrance composition (product of the present invention) was obtained in exactly the same manner as in Example 1, except that the composition was replaced with Chuo Kasei #@). This invention product also had various performances (properties) similar to those obtained in Example 1.

〔Effect of the invention〕

The gel fragrance composition of the present invention has a transparent and beautiful appearance, is a gel that is resistant to impact, and its volume decreases uniformly as it evaporates, leaving only a small amount of residue, allowing it to be used in a wide range of fragrances. It has various excellent performances (properties) as an aromatic agent, such as little change in scent tone and strength over time.

[Brief explanation of drawings]

FIG. 1 is a graph showing the relationship between the relative volatilization amount (%) and the passage of time, showing the volatilization test results for the products of the present invention and the control product.

Claims (1)

[Claims] Paraffinic hydrocarbons that are liquid and volatile at room temperature 50-9
0% by weight, 2 to 30% by weight of a styrene-butadiene-styrene block copolymer, and 0.5 to 30% by weight of a fragrance.