JP4634759B2 - Gel insect repellent - Google Patents

Description

  The present invention relates to a gel insect repellent, and more particularly to a gel insect repellent that is excellent in water separation inhibiting effect and that does not generate a transverse gap (gel thinning) when used in a container.

  Conventionally, gel preparations are known as one of preparations such as deodorants, fragrances, and insect repellents. In these, a gel-form preparation containing the desired active ingredient is stored in a suitable container, and the active ingredient is gradually volatilized for use.

However, in the conventional preparations, water separation occurs over time, which adversely affects the stability of the preparation. As means for solving such a problem, a gel-type deodorant containing starch as a water separation inhibitor has been proposed (for example, see Patent Document 1).
JP-A-6-245984 (page 1-4)

  What is described in Patent Document 1 is shown to have a water separation preventing effect when it contains 50 to 70% by weight of water, but is specifically shown when it contains more water. It is not clear whether the same water separation prevention effect can be obtained. In addition, water separation tends to occur under severe conditions where the temperature and temperature change are large compared to room temperature, but this point has not been studied.

  Products such as deodorants and fragrances are often placed under harsh conditions during distribution and storage, and if water separation occurs at that time, the product value will be lost and it will be economically lost. .

  Accordingly, the present invention provides a gel-like structure in which there is almost no water separation even when the water content is high or when it is placed under harsh conditions, and there is no transverse gap (gel thinning) when used in a container. The object is to provide an insect repellent.

As a result of diligent studies to achieve the above object, the present inventors have found that it is effective to add a gelling agent containing agar having a freezing point temperature of 37 ° C. or higher to a gel insect repellent. Invented. That is, the present invention is achieved by the following configurations.
(1) A gel-like insect repellent housed in a container, which contains a gelling agent containing agar having a freezing point temperature of 37 ° C. or higher.
(2) The container according to (1), wherein the gelling agent comprises any one of a mixture of agar, carrageenan and locust bean gum having a freezing point temperature of 37 ° C. or higher, or the above mixture further containing gellan gum. Gel-like insect repellent stored in
(3) The gelled insect repellent contained in the container according to (1) or (2), wherein the amount of the gelling agent is 0.5 to 3% by weight.
(4) The gel-like insect repellent housed in the container according to any one of (1) to (3), wherein the active ingredient is a room temperature volatile insect repellent essential oil .
(5) The active ingredient is one or more selected from the group consisting of α-pinene, spearmint oil, eucalyptus oil, cuba oil, mint oil, lemongrass oil, rosemary oil and lavender oil. A gel-like insect repellent housed in the container according to any one of (1) to (4).
(6) A method for suppressing water separation and lateral clearance of a gel-like insect repellent contained in a container, comprising a gelling agent containing agar having a freezing point temperature of 37 ° C. or higher.

  According to the present invention, even when the water content is high or under severe conditions, there is almost no water separation. Specifically, the gel insect repellent has a water separation amount of 1% or less with respect to the total amount of the preparation. An agent can be provided. Moreover, since this gel insect repellent does not generate a horizontal gap (gel thinning) when used in a container, it can be made to look good.

  The gelling agent used in the present invention contains agar (hereinafter also referred to as “agar” of the present invention) having a freezing point temperature of 37 ° C. or higher, preferably 37 to 41 ° C. And with one or more of gellan gum, carrageenan, locust bean gum, guar gum, gum arabic, gelatin, pectin, starch, carboxymethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, polyvinyl alcohol, polyacrylamide, polyacrylic acid, etc. Consists of a mixture. Furthermore, by adding a lactate salt (sodium salt, potassium salt, calcium salt, magnesium salt), it can act as a coagulation aid to further improve the shape retention of the gel.

The gelling agent is preferably a mixture of the agar, carrageenan and locust bean gum of the present invention, and more preferably calcium lactate added.
In addition, it is more preferable to use a mixture containing gellan gum in the mixture because water separation and lateral gap can be more effectively prevented.

  In the gel insect repellent of the present invention, the gelling agent may be blended so as to be 0.5 to 3% by weight, preferably 1 to 2.5% by weight, based on the total amount.

  The agar of the present invention may be contained so as to be 5 to 95% by weight, preferably 10 to 50% by weight, based on the total amount of the gelling agent.

  Here, the freezing point temperature of the agar of the present invention will be described. The freezing point temperature means the temperature at which a 1% concentration agar solution is left at room temperature and the sol is solidified. Specifically, the following measuring method is used. Is required.

  About 12 ml of a 1% concentration agar solution adjusted with the melting point is dispensed into a test tube (diameter 20 mm, height 150 mm). Then, cover with a rubber plug with a thermometer, adjust so that the end of the thermometer (reservoir) is immersed in the sol, and leave it at room temperature. Thereafter, the temperature at which the sol does not flow even when the test tube is tilted is read as the freezing point.

  As such agar, for example, Chile-made agar (made by Taiyo Co., Ltd.) using ogonori as a raw material can be used. Some of the agars have different gel strengths, but two or more of them may be used in combination in order to obtain the desired strength of the gel insect repellent.

  Furthermore, when adding a lactate to a gelatinizer, it is good to add so that it may become 5 to 40 weight% with respect to the whole quantity of a gelatinizer, Preferably it is 10 to 30 weight%. In addition, lactate can also be used by adding to a gel-like insect repellent separately from a gelling agent.

  When gelling gum is further included in the gelling agent, it may be blended so as to be 20 to 90% by weight, preferably 25 to 60% by weight based on the whole gelling agent. Moreover, since the dispersibility with respect to the water of the whole gelatinizer may worsen by the influence of gellan gum, it is good to use propylene glycol together as a dispersing agent.

  The gel insect repellent of the present invention can be produced, for example, by adding a solution obtained by emulsifying an insect repellent essential oil to a surfactant in a solution in which a gelling agent is dissolved, mixing, stirring, cooling and solidifying. In addition, said method is an illustration, Comprising: As long as the gel-form insecticide of this invention is obtained, the manufacturing method is not limited to said thing.

As the active ingredient of the present invention, it is preferable to use an insect repellent essential oil that is volatile at room temperature (which volatilizes naturally under a condition of about 10 to 40 ° C.), for example, rose oil, jasmine oil, patchouli oil, carnation oil, Mint oil, orange oil, bergamot oil, bechuba oil, spearmint oil, eucalyptus oil, cubeba oil, mint oil, lemongrass oil, rosemary oil, lavender oil, lemon oil, cedar oil, pine oil, tea tree oil, cassaya oil, ylang ylang Oil, geranium oil, citronellor oil, persimmon oil, pine needle oil, turpentine oil, anise oil, orange peel oil, clove oil, sandalwood oil, camphor oil, hinoki oil, columnus oil, henoposi oil, okotia oil, spike oil, Kayapute oil, One or more of such Dauddo oil.

In addition, one or more of these essential oils such as menthol, phytoncide, limonene, pinene, anethole, carvone, cineol, terpineol, eugenol, hinokitiol, linalool, safrole, cedrene, azalon may be used. You may use together with said essential oil .

  Among these, α-pinene, spearmint oil, eucalyptus oil, cubaeba oil, mint oil, lemongrass oil, cedarwood oil, pine oil, rosemary oil and lavender oil are effective to eradicate clothing pests, prevent invasion, and prevent spawning. It is preferable to use 1 type (s) or 2 or more types.

Furthermore, instead of the above essential oils , empensulin, transfluthrin, metfurflurin, paradichlorobenzene, 2,6,6-trimethyl-2,3-epoxybicyclo [3,1,1] heptane, ε-caprolactam, imidazole, vanillin, itaconic acid, angelic lactone, 1,7,7-trimethyl tricyclo [2,2,1,0] heptane, 6,6-dimethyl-2-methylbicyclo [3,11] heptane, dehydro acetic acid, mandelic acid, Insecticides such as 2-ethylidene-5 (or 6) formyl-bicyclo [2,2,1] heptane; diet, fatty acid chain ester having a carbon number of 10 to 11 and a boiling point of 200 to 230 ° C., camphor, Repellents such as naphthalene, cyclohexane, oxime, fluorin, acetonaphthene; propylene glycol Monopropyl ether, propylene glycol monobutyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, dipropylene glycol dimethyl ether, ethylene glycol monoisobutyl ether, diethylene glycol dibutyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, 7 to 7 carbon atoms 13 branched chain saturated hydrocarbons, limonene, pinene, anethole, lemon oil, bergamot oil, persimmon oil, pine needle oil, peppermint oil, turpentine oil, anise oil, cedarwood oil, lavender oil, eucalyptus oil, tea tree oil, Lemongrass oil, spearmint oil, geranium oil, rosemary oil, hiba oil You may use 1 type (s) or 2 or more types, such as ovalicides.

  The active ingredient may be blended so as to be 0.5 to 40% by weight, preferably 1 to 30% by weight, based on the total amount of the gel insect repellent.

  In order to emulsify, disperse and dissolve these active ingredients, lower alcohols such as ethanol and propyl alcohol; polyhydric alcohols such as glycerin, diethylene glycol, butylene glycol, propylene glycol, sorbitol, and xylitol; polyoxyethylene fatty acid esters, polyoxy One type or two or more types of surfactants such as ethylene sorbitan fatty acid ester, polyoxyethylene sorbite fatty acid ester, and polyoxyethylene alkyl ether can be used.

  The above alcohol and surfactant may be blended in an amount of 0.5 to 5% by weight, preferably 1 to 5% by weight, based on the total amount of the gelled insect repellent of the present invention.

  Moreover, as water required in order to make it into gel form, purified water, ionic water, alkaline ionized water, etc. can be used, for example.

  In addition to the above, the gel-like insect repellent of the present invention includes, if necessary, synergists such as IBTA and IBTE; stabilizers such as BHT and BHA; humectants such as glycerin; salicylic acid and paraoxybenzoic acid esters Preservatives such as Bioside 800S (manufactured by Taisho Technos); pigments such as Blue No. 1, Green No. 3 and Yellow No. 203; and fragrances such as vanillin, phenylethyl alcohol and piperonal can also be blended.

  The gel insect repellent of the present invention is usually used in a packaging material or container having a volatilizing means such as an opening or a gas permeable membrane.

  For example, polypropylene, polyethylene, polyethylene terephthalate, glass, or the like can be used as the material for the packaging material or container.

  The gel-like insect repellent of the present invention can protect clothes and the like from damage of larvae and adult worms of clothing pests such as moths, moths and cutworms.

  EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to these examples.

Test Example The gel-like insect repellent described in Table 1 was produced, and 300 ml was stored in a polyethylene terephthalate container and covered with an aluminum seal. Then, it was placed under test conditions, and the amount of water separation (ml) and the presence or absence of lateral gap (gel thinning) were confirmed. In addition, the amount of water separation collected the water separation by inclining a container for 10 minutes, and measured the total amount.
As examples of the gelling agent, Examples 1 and 2 include 20% agar (made by Chile, manufactured by Taiyo Co., Ltd.) having a freezing point temperature of 37 to 41 ° C., and a mixture composed of 50% carrageenan and 10% locust bean gum. To which 20% calcium lactate was added. Moreover, in the comparative example, it replaced with the agar of Examples 1-2, and used the agar with a freezing point temperature of 34-35 degreeC. The test was performed three times, and the results are shown in Table 2.

  As shown in Table 2, the test results of Examples 1 and 2 were excellent in water separation suppression effect with little water separation. Furthermore, no gap was generated between the inner wall of the container and the gel-like insect repellent, and no lateral gap (gel thinning) was observed. On the other hand, in Comparative Examples 1 and 2, the amount of water separation increased with time, and generation of a transverse space was observed in a part or all of the test specimen.

Example 3
As a gelling agent for gel-like insect repellents, it contains 14% agar (made by Chile, manufactured by Taiyo Co., Ltd.) having a freezing point temperature of 37-41 ° C., and 7-35% carrageenan, locust bean gum, and gellan gum were added. The test was conducted in the same manner as in Example 1 except that 19% calcium lactate was added. As a result, it was found that water separation and lateral clearance were further suppressed.
Specifically, in any of 25 ° C., 40 ° C., and 5 ° C. to 40 ° C. cycle conditions, the amount of water separation (ml) after 3 weeks was 0, and no transverse gap (gel thinning) was observed It was.

Formulation Examples Formulation examples of the gel insect repellent of the present invention are shown below, but the present invention is not limited to these as long as there is no obstacle to the practice of the invention.
Formulation Example 1
(Ingredient) (wt%)
α-Pinene 5.00
Spearmint oil 0.50
Eucalyptus oil 0.01
Cubeba oil 0.01
Peppermint oil 0.20
Lemongrass oil 0.01
Rosemary oil 0.01
Lavender oil 0.01
Gelling agent * 1.60
Concentrated glycerin 0.20
Polyoxyethylene alkyl ether 1.00
Polyoxyethylene sorbitan fatty acid ester 0.50
BHT 0.10
Ethanol 0.10
Preservative 0.10
Pigment Trace amount Purified water remaining Total 100.00
* Gelling agent is a mixture of agar (20%), carrageenan and locust bean gum with a freezing point temperature of 37 ° C or higher, with the addition of calcium lactate.
Formulation Example 2
(Ingredient) (wt%)
Lemongrass 10.00
Gelling agent * 1.40
Polyoxyethylene fatty acid ester 2.00
BHT 0.10
Preservative 0.10
Purified water balance Total 100.00
* Gelling agent is the same as in Formulation Example 1.
Formulation Example 3
(Ingredient) (wt%)
Turpineol 10.00
Gelling agent * 1.40
Polyoxyethylene fatty acid ester 2.00
BHT 0.10
Preservative 0.10
Purified water balance Total 100.00
* Gelling agent is the same as in Formulation Example 1.
Formulation Example 4
(Ingredient) (wt%)
α-Pinene 5.00
Tea tree oil 0.05
Cedarwood oil 0.20
Lavender oil 0.10
Rosemary oil 0.20
Lemongrass oil 0.10
Eucalyptus oil 0.20
Mint oil 0.10
Gelling agent * 1.40
Polyoxyethylene fatty acid ester 2.00
BHT 0.10
Preservative 0.10
Purified water balance Total 100.00
* Gelling agent is the same as in Formulation Example 1.
Formulation Example 5
(Ingredient) (wt%)
α-Pinene 10.00
Spearmint oil 0.15
Eucalyptus oil 0.10
Cubeba oil 0.10
Peppermint oil 0.20
Lemongrass oil 0.01
Rosemary oil 0.01
Lavender oil 0.01
Gelling agent * 1.60
Concentrated glycerin 0.20
Polyoxyethylene alkyl ether 1.00
Polyoxyethylene sorbitan fatty acid ester 0.50
BHT 0.10
Ethanol 0.10
Preservative 0.10
Purified water balance Total 100.00
* Gelling agent is the same as in Formulation Example 1.
Formulation Example 6
(Ingredient) (wt%)
α-Pinene 5.00
Cedarwood oil 0.50
Pine oil 0.50
Turpineol 2.50
Star anise oil 0.10
Rosemary oil 0.10
Peppermint oil 0.20
Eucalyptus oil 0.10
Gelling agent * 1.40
Polyoxyethylene fatty acid ester 2.00
BHT 0.10
Preservative 0.10
Purified water balance Total 100.00
* Gelling agent is the same as in Formulation Example 1.
Formulation Example 7
(Ingredient) (wt%)
α-Pinene 5.00
Spearmint oil 0.50
Eucalyptus oil 0.01
Cubeba oil 0.01
Peppermint oil 0.20
Lemongrass oil 0.01
Rosemary oil 0.01
Lavender oil 0.01
Gelling agent * 1.10
Propylene glycol 1.20
Concentrated glycerin 0.20
Polyoxyethylene alkyl ether 1.00
Polyoxyethylene sorbitan fatty acid ester 0.50
BHT 0.10
Ethanol 0.10
Preservative 0.10
Purified water balance Total 100.00
* Gelling agent is a mixture of agar (17%), carrageenan, locust bean gum and gellan gum with a freezing point temperature of 37 ° C or higher, with calcium lactate added.

Claims (6)

A gel-like insect repellent housed in a container, which contains a gelling agent containing agar having a freezing point temperature of 37 ° C. or higher. The gelling agent comprises either a mixture of agar having a freezing point temperature of 37 ° C or higher, carrageenan and locust bean gum, or the mixture further containing gellan gum . Gel insect repellent. The gelled insect repellent contained in a container according to claim 1 or 2, wherein the blending amount of the gelling agent is 0.5 to 3% by weight. The gel-like insect repellent housed in the container according to any one of claims 1 to 3, wherein the active ingredient is a room temperature volatile insect repellent essential oil . The active ingredient is one or more selected from the group consisting of α-pinene, spearmint oil, eucalyptus oil, cubaba oil, mint oil, lemongrass oil, rosemary oil and lavender oil. A gel insect repellent housed in the container according to any one of 1 to 4. A gelling insect repellent contained in a container and a method for suppressing lateral space, characterized in that a gelling agent containing agar having a freezing point temperature of 37 ° C. or higher is blended.