JP2002370904A - Agent and method for bumping prevention for preparation for transpiration by heating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bumping prevention agent effective for controlling bumping of a preparation for transpiration by heating and to provide a bumping prevention method for a preparation for transpiration by heating, which comprises using the bumping prevention agent. SOLUTION: This bumping prevention agent is characterized by comprising a starch or cellulose derivative as an active ingredient.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a bumping inhibitor for a preparation for heat evaporation and a method for preventing bumping of a preparation for heat evaporation using the bumping inhibitor.

[0002]

2. Description of the Related Art Conventionally, preparations for heat evaporation are frequently used for controlling pests. In recent years, car sterilization,
Heat-transpiration preparations for use in deodorization and the like have been developed.

[0003] These preparations for heat evaporation are those which evaporate the active ingredient using a heating means, and are typically used in the form of a self-heating device 1 as shown in FIG. The illustrated self-heating device 1 includes a cylindrical outer container 2 having a bottom, and contains a hydrothermal substance A from the bottom to the side. The outer container 2 has a plurality of water passage holes at the bottom, and the water passage holes are closed by a member having water permeability, for example, the nonwoven fabric sheet 3. Further, the inside of the outer container 2 is partitioned into two spaces by a partition member 4. The partition member 4 has a cylindrical shape and a substantially hollow hemispherical bottom, and its side wall is arranged concentrically with the peripheral wall of the outer container 2.

[0004] The hydrothermal substance A is filled in the space formed by the peripheral wall of the outer container 2, the partition member 4 and the nonwoven fabric sheet 3, and the partitioning member 4 accommodates the heating and evaporation agent B. Further, a cover member 6 having a plurality of openings formed in a region corresponding to the upper open surface of the partition member 4 is covered on the upper open surface of the outer container 2. It is closed by a hot-melt resin film 7 having ventilation holes.

The exothermic substance A is a substance which generates heat by reaction with water, and for example, calcium oxide (quicklime) is used. Therefore, at the time of use, by putting the self-heating device 1 into the container 20 containing water W, the water W flows into the outer container 2 through the water passage hole, and further the nonwoven fabric sheet 3
And the heat-evaporating agent B is heated by the reaction heat generated at that time, and the active ingredient is vaporized and released to the outside (such as a room) through the vent hole of the hot-melt resin film 7. Is done. The hot-melt resin film 7
Is heat-melted due to heat release from the heating and evaporation agent B and contact with the vaporized active ingredient, so that the vaporized active ingredient is efficiently released to the outside through the opening of the lid member 6 from a relatively early stage of evaporation. .

[0006]

In the self-heating device 1 configured as described above, during evaporation, the heating and evaporation agent B heated by the heating means becomes a high-temperature liquid at about 200 to 300 ° C. At this time, when foreign matter enters from the outside through the opening of the lid member 6 and comes into contact with the heating and evaporating agent B, rapid boiling, so-called “bumping” occurs locally, and a loud noise is generated. In some cases, droplets of the heating and evaporating agent B may fly out through the opening and contaminate the outside.

Further, due to the carelessness of the user or the like, water may be mixed into the heating and evaporating agent B at the time of evaporation, causing bumping due to water and causing the same problem.

[0008] The present invention has been made in view of the above circumstances, and a bumping inhibitor effective to suppress bumping of a preparation for heat evaporation and bumping of a preparation for heat evaporation using the bumping inhibitor. It is intended to provide a prevention method.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that starch or a cellulose derivative is effective for preventing bumping of a preparation for heat evaporation, leading to the present invention. Was. That is, the present invention is achieved by the following configurations. (1) An anti-bump agent for a preparation for heat evaporation, comprising starch or a cellulose derivative as an active ingredient. (2) A method for preventing bumping of a preparation for heat evaporation, wherein the bumping inhibitor according to (1) is added to the preparation for heat evaporation at a ratio of 1 to 10% by weight.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The bumping inhibitor (hereinafter, also referred to simply as “bump inhibitor”) of the preparation for heat evaporation according to the present invention is used by being contained in a container and heated by a heating means arranged outside the container. Formulation for heat transpiration in which the active ingredient evaporates,
For example, it can be applied to the preparation B for heating and evaporating used in the self-heating device 1 shown in FIG.

The active ingredients of the bumping inhibitor of the present invention include:
Examples include starch such as potato starch and corn starch; and cellulose derivatives such as sodium carboxymethyl cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose. These can be selected irrespective of the type of the preparation for heat evaporation, and may be used alone or in combination of two or more.

In the method for preventing bumping of a preparation for heat evaporation according to the present invention (hereinafter also referred to simply as "method for preventing bumping"), the above-mentioned bumping inhibitor is used in an amount of 1 to 10% by weight, preferably 1 to 10% by weight, based on the total amount of the preparation for heat evaporation. What is necessary is just to add so that it may become 2 to 8 weight%. If the amount of the bumping inhibitor is less than 1% by weight, the effect of preventing bumping becomes insufficient. On the other hand, when the amount of the bumping inhibitor is 10
When the amount exceeds 10% by weight, the effect of preventing bumping corresponding to the increase in weight is not improved, and the other components are relatively reduced, so that the action of the preparation for heating and evaporating (pest control, sterilization, deodorization, etc.) )
May be reduced.

[0014] As means for addition, (1) a bumping inhibitor;
Each component of the preparation for heat evaporation is mixed to form a granule, and the same form as the preparation for heat evaporation is prepared. (2) A granule comprising an anti-boiler and a preparation for heat evaporation are separately produced. Examples thereof include mixing both, (3) mixing the above (1) with a granule comprising an anti-bump agent, and (4) adding a powder preparation comprising an anti-bump agent to a preparation for heat evaporation.

[0015] Granules and powders comprising a bumping inhibitor may be prepared by using an appropriate carrier or additive, and may be used in the form of powders, blocking agents, tablets and the like in the same manner as described above. Good. In addition, since the bumping inhibitor of the present invention also has a function as a binder or a lubricant, when the preparation for heat evaporation as in the above (1) is used, a binder or a lubricant is not separately used. May be.

Examples of the carriers, active ingredients and the like used for preparing the above-mentioned granules and powders include the following.

Examples of the carrier include liquids such as water, alcohols and paraffins; binders such as polyvinyl alcohol and polyvinyl acetate; and sugars such as glucose and sorbitol.

The active ingredients of the preparation for heat evaporation are natural pyrethrin, pyrethrin, allethrin, phthalthrin,
Pyrethroid compounds such as resmethrin, framethrin, permethrin, phenothrin, cyphenothrin, prarethrin, transfluthrin, imiprothrin, empentrin, etofenprox; carbamate compounds such as propoxer and carbaryl; organophosphorus compounds such as fenitrothion and DDVP; Oxadiazole-based compounds such as fipronil; essential oils such as fittintide, peppermint oil, orange oil, cinnamon oil and clove oil; IBTA; IBT
E: a quaternary ammonium salt; an insecticidal / miticidal component such as benzyl salicylate; a repellent such as diethylmethtoluamide, di-n-butylsuccinate, hydroxyanisole;
Fungicides such as CMX and IPBC; deodorants such as lauryl methacrylate, geranyl crotonate, and catechin; essential oils such as rose oil, lavender oil, and peppermint oil; .

Further, as long as the invention can be carried out, surfactants such as nonionic surfactants, cationic surfactants, anionic surfactants, amphoteric surfactants, etc .; Organic solvents such as polyvinylpyrrolidone, glycol, and alcohol; synergists such as S421 and sinepiline; antioxidants such as BHT and BHA;
Rust inhibitors such as 2,3-benzotriazole and dicyclohexylammonium nitrite may be used.

The preparation for heating and evaporation to which the bumping inhibitor and the method for preventing bumping of the present invention can be applied is used by being housed in a container and heated by a heating means arranged outside the container. Examples of the container include a plastic container, a paper container, a metal container, a ceramic container, and a glass container. As a means for heating the heat-evaporation preparation, a hydrothermal method using a reaction between water and a hydrothermal substance such as calcium oxide, magnesium chloride, aluminum chloride, calcium chloride, or iron chloride (see FIG. 1); Air oxidation heat generation method using metals that generate heat by oxidation reaction such as a mixture of iron powder and ammonium chlorate and a mixture of iron and potassium sulfate; an electric heating method using a heater such as a nichrome wire, a positive temperature coefficient thermistor, and a semiconductor heater; Platinum catalyst system and the like can be exemplified.

The preparation for heat evaporation using the bumping inhibitor and the bumping prevention method of the present invention can be used for purposes such as pest control, sterilization, deodorization, aroma and the like.

[0022]

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

5 to 5.4 g of powder having the composition shown in Table 1
Then, 2 g of water was added to the mixture, and the mixture was granulated to a diameter of 2 mm and dried at 45 ° C. to prepare a preparation for heat evaporation which was made into granules. Then, as shown in FIG. 1, 56 g of calcium oxide was filled on the peripheral wall side of the outer container partitioned by the partition member, and 5 to 5.4 g of the preparation for heating and evaporation was filled inside the partition member. A sample of a hydrothermal method was prepared by covering with a lid member having a resin film.

Next, the container for storing the sample
2 ml of water was added, the sample was stored in the container, and the preparation for heat evaporation was heated. Then, when a part of the hot-melt resin film is heat-melted to form an opening, the opening is formed at a distance of 0.1 mm from the opening.
5 ml of water was injected, and the bumping condition of the preparation for heat evaporation was observed.

The observation results are shown in Table 2, and it was confirmed that Samples 1 to 4 using the bumping inhibitor and the bumping preventing method of the present invention had no bumping and good transpiration. On the other hand, Sample 5 not using the bumping inhibitor and the bumping prevention method of the present invention showed bumping and generated a loud noise.

[0026]

[Table 1]

[0027]

[Table 2]

[0028]

As described above, according to the present invention,
Stable transpiration can be performed by preventing bumping of the preparation for heat transpiration.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one use form of a preparation for heat evaporation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-heating apparatus 2 Outer container 3 Nonwoven fabric sheet 4 Partition member 6 Lid member 7 Resin film 20 Container A Heat-generating substance B Heat-evaporation preparation W Water

Claims (2)

[Claims] 1. An anti-bump agent for a preparation for heat evaporation, comprising starch or a cellulose derivative as an active ingredient. 2. A method for preventing bumping of a preparation for heat evaporation, comprising adding the bumping inhibitor according to claim 1 to the preparation for heat evaporation in a proportion of 1 to 10% by weight.