JPH0459900A - Packaged fluid bleaching agent - Google Patents

Abstract

PURPOSE:To produce the subject packaged fluid oxygen-based bleaching agent capable of carrying out either coating or discharging in accordance with requirement, and capable of uniformly mixing the content liquid even in case of occurrence of the separation due to freezing and thawing by attaching a member having air-intake holes and a discharging opening to the top part of a package. CONSTITUTION:To the top part of a package 1 for charging a fluid bleaching agent containing hydrogen peroxide as the active component, a member preferably equipped with a thin and long pipe 7 extending to the interior of the package and having one or more air-intake holes 4 and a discharging opening 3 is attached, thus obtaining the objective packaged fluid bleaching agent.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The product of the present invention is a peroxide product in a container, which is suitably used for bleaching and removing mold from clothing, textiles, pulp, and kitchen utensils, especially for bleaching clothing and tableware. Regarding hydrogen-based liquid bleach.

[Conventional technology]

Conventionally, chlorine bleach, which has been widely used as a liquid bleach, is cheap and has a powerful bleaching blade, but it has the disadvantage that it cannot be used on colored and patterned clothing because it discolors or fades the pigments of clothing. Furthermore, in recent years, social problems have arisen, such as when chlorine gas is generated when chlorine is mistakenly mixed with acidic cleaning agents, causing fatal accidents.

On the other hand, oxygen bleaches are superior in that they can be used on a wide range of clothing and do not generate chlorine gas, but most of the oxygen bleaches used on fabrics are sodium percarbonate or It is a powder type that uses sodium perborate as the main ingredient, which is not easy to use, and it also has the disadvantage that it cannot be applied especially to localized stains such as stains.

Therefore, in order to solve this problem, liquid oxygen bleaching agents have come to be used. Such liquid oxygen bleach contains about 3 to 6% hydrogen peroxide as an active ingredient. However, a 5% aqueous hydrogen peroxide solution is a homogeneous solution up to about -3°C, but when the temperature drops further and is left at -20°C for a long time, it forms a solid phase of water (
In other words, ice) is formed, so if you put this in a container and the temperature drops below -3℃, water will first begin to boil from the contact area of the container, and hydrogen peroxide will be trapped in the center of the bottle while increasing its concentration. Ill.

(:, 5humb et al, Hydroxid
e Peroxide, p, 211°New Yo
rk, Re1nhold Publishing C
organization).

Therefore, if it is left at a low temperature of -20℃ for a long time, the part that comes into contact with the container will freeze in a state close to water, and the center will contain relatively concentrated hydrogen peroxide in a liquid state. It turns out. After reaching this state, the temperature rises,
If the ice gradually melts at a temperature slightly above the melting point, the filtered hydrogen oxide and water will exist unevenly (a degree difference will occur) inside the container wherever it is frozen. Become.

Of course, if the container is shaken in such a case, it will immediately return to a uniform state, but if it is poured out without being shaken, it will be used with uneven concentration.

As described above, the phenomenon in which a liquid freezes and then thaws is hereinafter referred to as freeze-reconstitution, and the phenomenon in which a concentration difference occurs in an originally homogeneous solution due to freeze-reconstitution, etc. is hereinafter referred to as classification.

More specifically, in cold regions such as Hokkaido, the winter temperature drops to around -20 to -40 degrees Celsius, and then in the spring, the temperature rises, which means that the temperature rises and falls gradually until it reaches the freezing point. Therefore, when the temperature slightly exceeds the freezing point, the liquid content is in a classified state inside the container. Therefore, it is not desirable to use liquid bleach under such conditions due to its nature.

In order to prevent such classification due to freeze-reconstitution, it is best to incorporate a known hydrotrope into the bleach composition, but incorporating an amount sufficient to completely prevent freezing would result in a significant increase in cost. It is not desirable because it invites people. Also, in bleach solution,
Adding too much substance is not preferable in terms of decomposition stability of hydrogen peroxide.

[Problem to be solved by the invention]

Therefore, in the present invention, the contents can be applied by pressing the spout of the container onto clothing, etc., and the contents can also be poured into a washing machine, etc., and the liquid bleach can be frozen and restored in a cold region. Another object of the present invention is to provide a liquid bleach packaged in a container in which the problem of classification of hydrogen peroxide is less likely to occur in the solution poured out from the container through a spout.

[Means for Solving 5 Problems] The present invention and the inner stopper or cap that can be attached to the opening of the bleach container are provided with an outlet for dispensing and an air hole for taking in air, so that the content liquid can be This was based on the knowledge that when the container is tilted to pour it, the air that enters through the air holes becomes bubbles within the container, and these bubbles stir the contents, thereby restoring the homogeneity of the classified contents.

That is, the present invention provides a container-filled liquid bleach comprising a container filled with a liquid bleach containing hydrogen peroxide as an active ingredient, the container having at least one air intake hole and a pouring hole in the mouth of the container. To provide a liquid bleach packaged in a container, which is characterized by being provided with a member having a mouth.

Next, the container used in the present invention will be explained with reference to the drawings.

FIG. 1 shows an enlarged partial sectional view of the mouth of a container 1 (here, a plastic bottle) used in the present invention. In the figure, a member 5 (inner stopper in the figure) in which a spout (discharge port) 3 and an air hole 4 are formed in the top plate part 2 is a mouth part 6 of the bottle 1.
is mated to.

The member 5 can be made of polyolefin such as polyethylene. Among these, polyethylene is preferred in terms of moldability and sealability. The inner diameter of the discharge port 3 is 5 to 10
It is preferable that the inner diameter of the air hole 4 is 1 to 10 mm. Further, the outward protrusion a of the discharge port 3 is preferably 3 to 15 mm, and the length b of the air hole 4 is preferably 3 to lo+nm. In this way, both coating and pouring can be carried out suitably, and since air bubbles are easily introduced into the container, the uniformity of the liquid can be improved.

In such containers, when the container is tilted to drain the contents, the contents may flow back through the air holes, but it is recommended to attach a handle to the container to provide directionality for draining. As a result, there is a difference in height between the outlet and the air hole, so the pressure applied to the lower part of the air hole is smaller than the pressure of the liquid content applied to the upper part of the outlet. As a result, a reverse phenomenon in which the liquid content flows out from the air holes at the start of the discharge process can be more reliably prevented, and bubbles are smoothly generated by the air entering through the air holes.

In the present invention, the length b in FIG. 1 can be increased to 10 to 50 m by fitting the tube 7 into the inner protrusion of the air hole 4 as shown in FIG. 2. The tube used here preferably has an inner diameter of 2 to 5 mm.

By attaching the tube in this way, it is possible to prevent the reverse phenomenon from the air hole. The longer the distance between the tip of the tube and the outlet, the better the reversal phenomenon can be prevented. Furthermore, by making the tube spiral, the spiral tube shakes due to the air pressure introduced into the tube, causing bubbles to be shaken and generated, thereby improving the effect of preventing classification. In addition, by attaching a porous body to the tip of the tube and giving it a certain amount of weight, the porous body (described later) will lower when the tube is tilted, generating air bubbles from this part and preventing classification from being discharged from the first portion. The material of these tubes is not particularly limited, but silicone rubber or polyethylene is preferable from the viewpoint of moldability and cost.

Further, as shown in FIG. 3, by making the ends of the air holes 4 porous 8, the bubble diameter can be reduced and the number of bubbles can be increased. Here, sintered polyethylene can be used as the porous body.

Furthermore, as shown in Figure 4, if the size of the pore is defined as the air pore diameter (discharge port diameter) and the internal solution has a certain degree of viscoelastic rheological property or surface tension, the internal solution will flow out first from the large-diameter discharge port. , the purpose can be achieved even with a nearly flat structure, and there is no need to provide a particular distance between the upper part of the outlet and the lower part of the air hole.Specifically, the inner diameter of the air hole should be 2 to 5+n+n, and the inner diameter of the spout. 5 to 10 mm, and a Brookfield viscometer (Tokyo Keiki B type viscometer, N (L 1 or No, 20-ter, 30 rp)
The container may be filled with a liquid bleach having a viscosity of about 1 to 10 cp at 25°C, measured at m>. In such a structure, if the small air holes are tapered as shown in the figure, air can flow in smoothly. Note that such a planar structure has good formability and is advantageous in terms of manufacturing costs. Furthermore, an inner stopper as shown in FIGS. 5(a) and 5(a) can be used as the member 5.

In the member 5 shown in FIGS. 1 to 4 above, the spout 3
Although it is preferable to provide one, it is also possible to provide a plurality of them.

Furthermore, a plurality of air holes 4 may be provided. As the container in which the member 5 is provided, a container whose body has a cross-sectional shape of a circle, an ellipse, or a rectangle, which is commonly used as a container for liquid bleach, can be used. Finally, after fitting the member 5 to the mouth of the container, it is preferable to further cover the member with a cap.

Hydrogen peroxide, which is used as the main component of the liquid bleach filled in the above container, is manufactured by various manufacturing methods such as electrolytic method and auto-oxidation method, and JIS standard products with a concentration of about 30% to 60% are commercially available. . Furthermore, in recent years, 30% hydrogen peroxide, which contains almost no impurities, has been commercially available for use in the electronic industry (for cleaning electronic parts). In the present invention, there is no particular problem in using any of these, but it is preferable to use one with a hydrogen peroxide concentration of 2 to 10%.

Except for those used in the electronics industry, these concentrated hydrogen peroxides usually contain trace amounts of phosphates added as a decomposition stabilizer by the manufacturer (for example, the JIS Reagent Special Standard specifies 0.0003% or less as PO2). ) is common. However, when a concentrated hydrogen peroxide solution is diluted to a desired concentration, the decomposition stabilizer added by the manufacturer is insufficient, and various stabilizers must be added at the same time as the dilution. Various techniques have been proposed as stabilizers used for such purposes; for example, the Japanese Pharmacopoeia lists oxidol (3 to 3.
As a stabilizer for 5% hydrogen peroxide solution),
There are descriptions of phosphoric acid, barbituric acid, uric acid, acetanilide, oxyquinoline, tetrasodium pyrophosphate, zenacetin, etc. Furthermore, in JP-A-63-110294, aminopolyphosphonates are used as stabilizers for hydrogen peroxide, such as chelating agents such as ethylenediaminetetraacetic acid, butyrate, hydroxy, toluene, and mono-t-butyl hydroquinone. It is clearly stated that it is already known to use antioxidants. Thus, using a suitable combination of a chelating agent and an antioxidant is particularly effective for stabilizing hydrogen peroxide.

The mechanism of action of these stabilizers is that chelating agents prevent hydrogen peroxide from abnormally decomposing due to these heavy metals by capturing them, and antioxidants prevent organic substances mixed in the composition. This is said to be because it shows the effect of preventing oxidation by hydrogen peroxide. Examples of such chelating agents and antioxidants include ethylenediaminetetraacetate, diethylenetriaminepentaacetate, and hydroxyethyliminodiacetic acid, although they partially overlap with the compounds described in JP-A-63-110294. Aminopolycarboxylic acids represented by salts, inorganic phosphorus compounds represented by tripolyphosphates, pyrophosphates, etc.
- Phosphonates such as hydroxyethane-1,1-diphosphonic acid and 2-phosphono-1,2,4-licarboxylic acid, and polyamino acids represented by compounds represented by the following general formulas ('I) to (III). Phosphonic acids, organic phosphoric acid esters represented by phytic acid, etc. are mentioned, and antioxidants include DL-α-tocopherol, gallic acid derivatives, butylated hydroxyanisole (BHA), 2.6
-tert-butyl-4-methyl 7znol (BI
T), etc. The amount of these stabilizers added depends on the concentration of hydrogen peroxide, but is usually added in a range of about 0 to 5%, preferably 0.01 to 3%.

N (CH2PDJz) 5 (I) (H2O, PCH2) 2N (CH2) packed (CH, P[
]31(2)2(II)(8203PCH2) 2N
(CH2) J (CH2) hN (CH2,PO
3H2) 2CH2PO3H2, (In[) (in the formula, m = 2 to 6, n = 1 to 2) I) H of the hydrogen peroxide-containing liquid bleach used in the present invention is 7 or less, preferably 6 or less, Particularly preferably, a lower pH value of 5 or less is more stable. This means that the pKa of hydrogen peroxide decomposition reaction is 11.
．． 6 (Kirk-Othmer Encyclope
Dia of Chemical Technology
y, 5econdedrt1on (Vol, 14>
, p 829. New York, John
nWiley & 5ons, Inc. (1
967). ), so if pl ( becomes alkaline, it will rapidly start to self-decompose.In addition, if an aminocarboxylic acid-based chelating agent such as ethylenediaminetetraacetate is used as a stabilizer for hydrogen peroxide, If the pH is lower than 3, the chelating agent will become insoluble in water and will precipitate, which will actually worsen the stability, so it is inappropriate to lower the pH extremely. In the case of phosphate ester-based or phosphonic acid-based chelating agents, the pH
Even if it is lowered to about 1 to 2, no particular inconvenience occurs. 9
In order to adjust H, inorganic acids such as sulfuric acid, phosphoric acid, and hydrochloric acid or organic acids such as toluenesulfonic acid and benzenesulfonic acid may be used, or the above-mentioned chelating agent or the below-mentioned anionic surfactant may be added in the form of an acid. Or, if necessary, adjust using a caustic alkali such as sodium hydroxide or potassium hydroxide.

In addition to the above-mentioned hydrogen peroxide stabilizer, various known additives can be added to the liquid bleach. Among these, surfactants are relatively important because they increase penetration power and detergency. As the surfactant, nonionic surfactants are particularly preferred. Examples of nonionic surfactants include higher alcohols having about 8 to 24 carbon atoms, polyhydric alcohols, fatty acids, fatty acid amides, fatty acid amines, alkylphenols, and alkylene synthetic alcohols obtained by oxidizing n-paraffins and α-olefins. It is an oxide adduct. As the alkylene oxide, ethylene oxide, propylene oxide, and butylene oxide are used. Specifically, FOE(p=
10) Lauryl ether, POE ('16-9) CI2
-14 secondary alkyl ether, FOE (and 15) hexyl decyl ether, POE (p=20) nonylphenyl ether, POE- (D=11) stearyl ether, PUB (p=10) glyceryl monostearate, POE (β:10) Isostearyl ether, PUB
(p=50)) Limethylolebuhypan, POE (
D=30) Hydrogenated castor oil, PIE (p=60) Hydrogenated castor oil monolaurate, P[lE Q+=20) Sorbitan monooleate, P[lE (ip=30) Glyceryl triisostearate, POE (?20) ) glyceryl monostearate, P ko (p=10) monostearate)
, POE (p=6) stearylamine, lauroylgetanolamide, POE (C=10>stearylamide, POE (i>=9) FDP ('p=5) CI
214 secondary alkyl ether, etc. Furthermore, POE
represents polyoxyethylene, POP represents polyoxypropylene, and p represents the average number of moles of alkylene oxide added.

In addition to nonionic surfactants, alkylbenzene sulfonates, olefin sulfonates, polyoxyethylene D+=0.5-8) alkyl ether sulfates, alkyl (alkenyl,) sulfates, saturated or unsaturated fatty acid salts, and Anionic surfactants such as α-sulfo fatty acid salts or esters, cationic surfactants such as benzalkonium chloride, dialkyldimethylammonium chloride, alkyltrimethylammonium chloride, amphoteric surfactants such as alkylaminobetaine, alkyldimethylamine oxides and N- Semipolar surfactants such as mono- or jetanolamide having an acyl group, fluorine-based surfactants, and the like.

The term "alkyl group" or "acyl group" as used herein is a general term for a saturated, unsaturated, or branched alkyl group or acyl group having an average carbon number of 8 to 20. The amount of surfactant to be blended can usually be about 0 to 20%, preferably 0.1 to 20%.
The content is preferably 10%.

Although the main purpose of the present invention is to prevent classification due to freeze-restorer, it is also possible to add a hydrotrope to the bleach solution for the purpose of improving freeze-restorer properties or preventing liquid separation at high temperatures. . Examples of such hydrotropes include - For boat fishing, short-chain alkylbenzene sulfonates such as toluene sulfonate and xylene sulfonate, ethanol, ethylene glycol, propylene glycol, hexylene glycol, chrycerin, etc. Alcohols and polyhydric alcohols represented by, and the general formula % formula % R is an alkyl group having 1 to 6 carbon atoms R゛ is hydrogen, or a methyl group R'' is hydrogen, or an alkyl group having 1 to 6 carbon atoms m and n
is an alkylene glycol ether represented by a number from 0 to 6.

The hydrotrope can be blended in an amount of about 0 to 30%, but as mentioned above, blending in too much will impair the stability of hydrogen peroxide, so blending a large amount is not preferable.

Liquid bleaches can contain substances known as anti-fading agents. Such substances include glycine, alanine, glutamic acid, phenylalanine, histidine,
Amino acids and amino acid salts such as lysine, tyrosine, and methionine; amino or imide compounds such as iminodiacetic acid and hydroxyiminodiacetic acid; and one or two monomers copolymerizable with acrylonitrile and acrylonitrile having a quaternary ammonium group. These include copolymers with more than one species. Although optical isomers exist in amino acids, optical isomers do not affect the effects of the present invention. Therefore, it is also possible to use chemically synthesized amino acids.

Tinopal CB S C Ciba is used as an optical brightener to increase the bleaching effect on white fibers.
Optical brighteners such as Ciba-Geigy, Chinopal SWN and Color Index Optical Brightener 28.40.61.71 may be added in an amount of 0 to 5%.

A thickener can be added in an amount of 0 to 20% for the purpose of increasing the viscosity of the composition and improving its usability.

-For boat fishing, synthetic polymers such as polyacrylates, acrylic-maleic acid copolymers, carboxymethylcellulose derivatives, methylcellulose, and hydroxymethylcellulose, natural polymers such as xanthan gum, guar gum, and Kelsan, and water-swellable clays such as montmorillonite and vegum Minerals, etc. Also, JP-A-1-31960
It is also possible to impart viscoelastic rheological properties by combining an amphoteric surfactant and an anionic surfactant as described in Publication No. 0.

In addition, the present invention further includes appropriate amounts (approximately 0 to about 2% each) of various trace additives such as colorants such as dyes and pigments, fragrances, silicones, disinfectants, ultraviolet absorbers, and inorganic electrolytes. I can do it. In addition, as the dye, an acidic dye having hydrogen peroxide resistance in an acidic solution is particularly preferable.

Additionally, compounds such as organic peracids can be used to enhance the bleaching effect. Examples of such organic peracids include dodecane diperacid and monoperphthalic acid, and these organic peracids are preferably added after being adjusted to an aqueous dispersion system by a known method.

Further, in order to enhance the bleaching effect, a known activator for hydrogen peroxide may be used. Such activators include N-acyl, O-
Acyl-type peracid precursors, JP-A-63-270800, JP-A-63-1 (1700), JP-A-1-92
N-
Halo hindered amine compounds and the like are known. Specific compounds include tetracetyl glycoluril, pentaacetyl glycol, tetraacetyl ethylenediamine, sodium nonanoyloxybenzenesulfonate, etc. as organic peracid formation activators, and - as doublet oxygen generation activators. is 1-chloro-4-hydroxy-
2,2,6,6-titramethylpiperidine, 1-chloro-4-[N-acetyl-N-methylaminoco-2,2,
6,6-titramethylpiperidine, p-)luenesulfone chloroamide sodium, and the like. The amount of these activators to be added is preferably about 0.02 to 1 mole per 1 mole of hydrogen peroxide, which is the main component used. As for the blending method, since direct addition of these compounds impairs the stability of hydrogen peroxide, it is preferable to melt and disperse them in a compound such as a fatty acid, for example. In some cases, the bleach may be a two-component type (two-component type, in which the hydrogen peroxide solution and the activator are placed in separate containers), which is stored in separate containers. In this case, it is preferable to fill the containers with each of the two liquids.

The viscosity of the liquid bleach used in the present invention is not limited, but in order to simultaneously improve coating properties and pourability, a Brookfield viscometer (Tokyo Keiki B type viscometer, No.
1 or 2 measured at Nn2o-tar, 30 rpm)
It is preferable to use one having a viscosity of about 1 to 300 cP at 5°C.

〔Effect of the invention〕

According to the present invention, it is possible to perform either application or pouring of the liquid bleach as desired, and even if classification occurs in the content liquid due to freeze-reconstitution, 1 is generated each time the liquid bleach of the content liquid is poured. Since the content liquid is mixed uniformly by the action of the bubbles, the effect of the bleaching agent is uniform and has great commercial value.

The present invention will be explained below with reference to Examples, but the present invention is not limited thereto.

〔Example〕

Example 1 Hydrogen peroxide; 5.0 (%)
POε (ya=9) [,,, Secondary alkyl ether (Softanol 90: Nippon Shokubai); 1.5 LA
S-H (C,2 linear alkylbenzene sulfonic acid)
;0.3 Diethylenetriaminepentaacetic acid ;0.05DL-α-tocopherol ;0.02 Acidic dye
; Trace fragrance
;Trace ion exchange water;
A bleach solution consisting of Balance was formulated. In addition, just before balancing to 100% with ion-exchanged water, adjust the pH of the stock solution to 4.0.
Adjusted to. Also, the viscosity of this bleach is 4c.p.

(25°C), and the freezing point was -6.2°C.

The internal volume of this bleach bottle is 1170mj! A cylindrical polyethylene bottle with a handle, 1000-
It was filled and frozen and refrigerated. Freeze restoration at -20°C and -5°C
A temperature history was provided by moving between constant temperature baths at 48 hour intervals, and this was repeated six times. -5℃ after freeze-restoration
In this state, a capillary tube was inserted to collect bleach solution at the surface, center, and bottom, and the hydrogen peroxide concentration was measured.The hydrogen peroxide concentration at the surface was 0.94%, and at the center, it was 7. .5%, and 3.2% at the bottom, indicating that hydrogen peroxide was concentrated in the center.

Therefore, the following experiment was conducted using the container of the present invention.

1000 ml of the above mentioned bleach was placed in the same bottle as above. However, for Bottle A (product of the present invention), the inner stopper shown in Fig. 1 (distance between the tip of the outlet and the tip of the air hole is 20 mm)
, a spout diameter of 2.5 +++ m, and an air aperture of 2.5 mm were fitted to the mouth of the bottle. In addition, for bottle B (comparative example), the inner stopper shown in FIG. 1 with the air hole closed was used. In the product of the present invention, bubbles are generated continuously at the same time as the content liquid is discharged, whereas in this comparative example, since there are no air holes, the bottle can be simply tilted, depending on the viscosity and surface tension of the content liquid. If you do this alone, the contents will not be drained; instead, grasp the bottle and push it out (
(squeezing the bottle) was required for it to be expelled. Moreover, air bubbles were generated discontinuously from the discharge port only when the bottle was held upside down and the grip on the bottle was weakened after the liquid had been forcibly discharged, as the pressure inside the bottle became lower than the outside pressure. .

Therefore, especially during the first discharge, the content liquid is not stirred by air bubbles, so it is presumed that it is impossible to prevent classification (method of use; ■). Furthermore, with a bottle of this type of structure, the method of use is to grasp the bottle with your hand and squeeze it to drain the contents, then stand the bottle upright in this state, and then remove your hand from the bottle. This method of use does not generate air bubbles inside the bottle, so the liquid content was not agitated by air bubbles (method of use; ■).

Further, for bottle C (comparative example), a normal inner stopper (inner diameter 16 mm) having only a spout was used. These samples were frozen and restored six times under the conditions described above. After freezing and restoring, this solution was sampled 10 times in a row at -5°C using a cap (standing upright after each sampling), and the hydrogen peroxide concentration (%) in this sample was measured. . However, Bottle B (How to use; ■) is 30rnI when held upside down! I squeezed it one by one and discharged it repeatedly.

The results are shown in Table-1.

=71 It can be seen that when the container of the present invention is used, even if classification occurs, the uniformity of hydrogen peroxide is maintained because it is stirred by air bubbles during pouring. In addition, it can be seen that with a bottle like Bottle B, it is impossible to prevent classification, especially in the first batch, even if the bottle is used as described in ■.

Example 2 550 ml of the bleach composition described above was filled into a bottle with an inner volume of 680 mA', and 12 bottles (4 rows x 3
A cardboard box that can be packed (1 sheet partition in the 2nd row)
It was packed in sheets). Among these, only one of the four-cornered bottles uses the inner stopper (tube length: 50'mm, outlet diameter: 2.5mm) shown in Figure 2 (product of the present invention), and the other bottles use regular inner stoppers. Each was capped using a stopper (inner diameter 16 mm). This box was stored in a warehouse in Hokkaido for about three months from winter to spring. The minimum temperature inside the cardboard box during storage is:
-10°C, and the highest temperature was 5°C. Furthermore, the temperature inside the warehouse at the time of collection was 8°C, and the temperature inside the cardboard box was 5°C.

The freezing point of this composition is determined by the temperature inside the cardboard box after storage.
I passed it a few months later.

Take out the comparison bottle from one of the four boxes in the cardboard box, insert capillary tubes into five points from the surface of the liquid to the bottom in the warehouse (at a temperature of 8°C), collect the contents, and When the hydrogen oxide concentration was measured, it was found that the surface area 4
．． 83%, top 4.93%, center 5.09%, bottom 5
．． 19%, and 5.23% at the bottom, confirming that hydrogen peroxide was classified inside the bottle. Furthermore, on the day of recovery, approximately 60 days had passed since the day when the freezing point was finally exceeded, so it was recovered to this degree of classification through weak agitation due to natural convection, etc., and the freezing point was exceeded. It is presumed that immediately after that, the classification was more intense.

Therefore, another comparative bottle in one of the four cardboard boxes and the product of the present invention were sampled 20 times in a row, each approximately 28 d, into the cap, and the hydrogen peroxide concentration (%) in the sample was measured. The results are shown in Table-2.

As is clear from the results in Table 2, even in its natural state, the containerized liquid bleach of the present invention suffers from the uniformity of hydrogen peroxide even if classification occurs because it is stirred by air bubbles during pouring. It can be seen that it is preserved. In particular, it can be seen that the classification suppression results from the first time to the sixth time are significantly improved.

[Brief explanation of drawings]

1 to 5 show schematic cross-sectional views of an inner stopper provided at the mouth of a container filled with the liquid bleach of the present invention. In the figure, 1 is a container, 3 is a spout, 4 is an air intake, and 5
is a medium stopper. Picture 2G (I) Noho*, 313 years old, 90 years old

Claims (2)

[Claims] (1) A liquid bleach in a container, which is made by filling a container with a liquid bleach containing hydrogen peroxide as an active ingredient, the container having at least one air intake hole and a spout at the mouth. 1. A container-packed liquid bleach, characterized by comprising a member having: 2. The containerized liquid bleach of claim 1, wherein the air intake hole comprises an elongated tube extending into the interior of the container.