JPS63260956A - Gel-like base for aromatic - Google Patents

Abstract

PURPOSE:To provide the title base which gives easily a gel-like aromatic by adding essential ingredients, said aromatic causing no separation of water even when a freeze-thaw cycle is repeated, by blending an aq. gel contg. carrageenan as a gelling agent and locust bean gum as a thickener with a nonionic cellulose derivative. CONSTITUTION:An aq. gel (A) formed by using 1-6wt.% carrageenan (A) as a gelling agent and 0.5-3wt.% locust bean gum as a thickener is blended with 0.01-30wt.% nonionic cellulose derivative (B) having an MW of 10,000-350,000, such as hydroxypropylmethylcellulose, to obtain the title base. An essential oil perfume (e.g., lemon oil), an emulsifying agent such as a sorbitan fatty acid ester (ethylene oxide adduct), etc. are added thereto and the mixture is molded into a desired shape to obtain a gel-like aromatic.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improvements in aqueous gels used as bases for gel fragrances. More specifically, the present invention relates to a novel gel base for fragrances that suppresses syneresis that occurs when the temperature changes during storage or use, for example when the temperature is returned to room temperature after freezing.

Conventional technology Conventionally, gel fragrances have been known as oil-based gel-type fragrances that are mainly composed of hydrocarbon solvents and water-based gel-type fragrances that are mainly water-based. The mainstream is an aqueous gel type that uses carrageenan as a gelling agent.

However, this aqueous gel using carrageenan as a gelling agent causes a syneresis phenomenon when the temperature changes, for example, when the temperature is returned to room temperature after freezing, resulting in practical problems such as deterioration of appearance and decrease in gel strength. It has the disadvantage of causing changes in physical properties.

To overcome these drawbacks, it has been proposed to add natural gums such as locust bean gum and xanthan gum, semi-synthetic or synthetic polymeric substances such as carboxymethyl cellulose and polyvinyl alcohol as thickeners. However, (Japanese Patent Publication No. 58-34142, Japanese Patent Publication No. 57-15902), a sufficiently satisfactory effect has not been obtained.

Problems to be Solved by the Invention The present invention improves the syneresis prevention properties of an aqueous gel obtained by using carrageenan as a gelling agent, and provides a gel base for fragrances that does not cause any syneresis even when returned to room temperature after freezing. It was made with the purpose of providing.

As a result of extensive research to develop an aqueous gel that does not cause syneresis due to temperature changes, the present inventors have developed carrageenan as a gelling agent and locust as a thickener. It was discovered that the objective could be achieved by blending a nonionic cellulose derivative into an aqueous gel prepared using bean gum, and based on this knowledge, the present invention was accomplished.

That is, in an aqueous gel formed using carrageenan as a gelling agent and locust bean gum as a thickener,
The present invention provides a gel base for an aromatic agent, which is characterized in that it contains a nonionic cellulose derivative.

The aqueous gel of the present invention is prepared using carrageenan as a gelling agent and locust bean gum as a thickener. The amount of carrageenan used at this time is 1 by the total weight of the gel.
Based on this, the amount of 1-6 weight locust bean gum to be used is selected within the range of 0.5-3% by weight.

In addition, in the present invention, it is necessary to use a cellulose derivative having neither acidic nor basic groups, such as methylcellulose, hydroxyethylcellulose, and hydroxypropylmethylcellulose, as the nonionic cellulose derivative to be added to the aqueous gel. It is. Particularly preferred as this nonionic cellulose derivative is hydroxypropylmethylcellulose.

The molecular weight of these cellulose derivatives is 10.0
00-350,000, preferably 100,000-3
A range of 00,000 is suitable.

The amount of the nonionic cellulose derivative to be blended is selected within the range of 0.01 to 0.3% by weight, preferably 0.05 to 1.5% by weight, based on the total weight of the aqueous gel.

If the amount is less than 0.01% by weight, a sufficient effect of suppressing syneresis cannot be obtained, and if the amount is more than 3.0% by weight, the shape retention of the gel will be impaired.

The gel base of the present invention can be made into a gel fragrance by adding an essential oil fragrance, an emulsifier for dispersing it, and the like, and molding it into a predetermined shape.

As the essential oil fragrance, for example, lemon oil, orange oil, lime oil, eucalyptus oil, cypress oil, cypress oil, pine oil, terpine oil, haw oil, lavender oil, jasmine oil, etc. are used. These may be used alone, or two
You may use it in combination of more than one kind.

In addition, as emulsifiers, 7-ionic surfactants such as ethylene oxide adducts of sorbitan fatty acid esters, ethylene oxide adducts of nonylphenol, and ethylene oxide adducts of secondary higher alcohols, furkylbenzene sulfonates, α-olefin sulfonic acids, etc. 7-ionic surfactants such as salts are used. These may be used alone or in combination of two or more.

In addition to the above-mentioned components, this gel fragrance may contain a gel strength enhancer such as potassium chloride, a coloring agent, an antibacterial agent, an antifouling agent, an antioxidant, and the like.

To prepare a fragrance containing the gel base of the present invention, for example, carrageenan, locust bean gum, a gel strength enhancer, a coloring agent, an antibacterial agent, an anti-plaguing agent, etc. are mixed with water, and the mixture is stirred while heating. Dissolve. Next, a nonionic cellulose derivative is added, and heating is continued to completely dissolve all components to form an aqueous sol. Next, an oily fragrance, an emulsifier, and an antioxidant are mixed, added to the aqueous sol previously prepared, mixed thoroughly, poured into a predetermined container, and left to cool to form a gel.

The gel-like fragrance thus obtained is suitable as an air freshener for toilets, automobiles, and rooms.

Effects of the Invention The gel-like base of the present invention can be easily made into a gel-like fragrance by adding necessary ingredients to it, and the gel-like fragrance thus obtained can be repeatedly frozen and melted. Since it does not cause water separation, it has the advantage that it can be used without any problems even in cold regions and low-temperature greenhouses.

Example Next, the present invention will be explained in more detail with reference to Examples.

In addition, the amount of syneresis, gel appearance, and degree of decrease in gel strength in each example were measured as follows.

(1) Amount of syneresis: The amount of syneresis when a sample was frozen at -20° C. for 16 hours and thawed by being left at room temperature for 8 hours was evaluated as follows.

◎・・・Rarely no syneresis ○・・・Slight syneresis×・・・Separation××・・・Significant water separation (2) Appearance of gel; Thaw as described in (1) above, The appearance of the gel was visually judged and evaluated as follows.

◎... No change ○... Slight change ×... Change (3) Degree of decrease in gel strength; Gel strength before freezing was measured and frozen and restored under the conditions of (1) above. The gel strength was similarly measured and evaluated as follows.

◎... hardly decreases ○... decreases ×... significantly decreases Examples Of the ingredients shown in the following table, carrageenan, locust bean gum, potassium chloride, propylene glycol, and water were mixed. , after dissolving with stirring at 60°C,
Further, at this temperature, hydroxypropyl methylcellulose or methylcellulose (polyvinyl alcohol in the case of the comparative example) was processed and stirred to completely dissolve it, thereby obtaining an aqueous sol.

Next, the fragrance, surfactant, and antioxidant were mixed and stirred to dissolve, and then added to the aqueous sol described above and thoroughly mixed at 60°C. This mixture
A gel fragrance was produced by pouring it into a container and leaving it to cool.

The following table shows the amount of water separation, gel appearance, and degree of decrease in gel strength of this product.

7, / /' Procedural amendment May 15, 1988 1. Indication of the case 1988 Patent Application No. 97170 2. Name of the invention Gel base for fragrance 3. Person making the amendment Relationship with the case Patent applicant: 3-7 Honjo-chome, Sumida-ku, Tokyo (676) Lion Co., Ltd. Representative: Atsushi Kobayashi 4, Agent 5, Date of amendment order: Voluntary 6, Number of inventions increased by amendment: 0 7, Subject of amendment The scope of claims and detailed description of the invention column 8 of the specification, contents of amendment (1) The scope of claims will be corrected as shown in the attached sheet.

(2) r o, ot ~ on the 3rd line from the bottom of the 4th page of the specification
Correct "0.3% by weight" to "rO,01~3.0% by weight".

(3) In the first line of page 5, "Gel more than 3.0% by weight" is corrected to "Gel more than 3.0% by weight."

(4) "Turpentine oil" in line 8 of page 5 is corrected to "turpentine oil."

(5) Same 5th bae? ) Line 9 [Jasmine oil etc. are used. ” [Jasmine oil etc. are used. ” will be corrected.

(6) On page 6, line 6, “antibacterial” was replaced with “antibacterial agent.”
I will correct it.

(7) Correct "dissolve" to "thaw" on the bottom line of page 6.

(8) “Static water amount” in the physical properties column in the table on page 10
will be corrected to "amount of water separation".

Claim 1: A gel base for an aromatic agent, characterized in that a nonionic cellulose derivative is blended into an aqueous gel formed using carrageenan as a gelling agent and locust bean gum as a thickener.

2. The gel base for fragrance according to claim 1, wherein the nonionic cellulose derivative is hydroxypropylmethylcellulose.

3. The gel base for fragrance according to claim 1, wherein the amount of the nonionic cellulose derivative is in the range of 0.01 to 1% by weight based on the total weight.

Claims (1)

[Scope of Claims] 1. A gel-like base for fragrance, characterized in that a nonionic cellulose derivative is blended into an aqueous gel formed using carrageenan as a gelling agent and locust bean gum as a thickener. . 2. The gel base for fragrance according to claim 1, wherein the nonionic cellulose derivative is hydroxypropylmethylcellulose. 3. The gel base for fragrance according to claim 1, wherein the amount of the nonionic cellulose derivative is in the range of 0.01 to 0.3% by weight based on the total weight.