JPH11279592A - Liquid bleach articles - Google Patents

Abstract

(57) [Problem] To provide a liquid bleaching product excellent in storage stability, in which contents do not exude to a container surface even during long-term storage. SOLUTION: A liquid bleaching composition containing hydrogen peroxide, a surfactant and a sequestering agent is filled in a plastic container, and the liquid bleaching composition has an electrical conductivity of 0.2 at 25 ° C. 8 S / m or less, and the plastic container has a thickness of 20 to 500 μm made of at least one selected from linear low-density polyethylene, low-density polyethylene, unstretched polypropylene, stretched nylon, stretched polypropylene, and polyethylene terephthalate. A liquid bleach article.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid bleaching article having excellent storage stability in which contents do not seep out to the surface of a container during storage.

[0002]

2. Description of the Related Art Liquid bleaching agents prevent hydrogen peroxide contained as a bleaching active species from decomposing during storage to generate oxygen gas, thereby preventing swelling and the like caused by the decomposition. It is packed in a thick and strong container for the purpose. However, from the viewpoint of resource saving and reduction of the amount of plastic refuse, it is desired to sell bleach for refilling packed in thin plastic pouches.

A plastic refillable small bag container is disclosed in Japanese Patent Publication No. 3-505322, Japanese Utility Model Application Laid-Open No. 3-1.
There is one disclosed in Japanese Patent No. 23847. However, when these containers are used, there is a problem that the containers are significantly swollen and deformed or burst during storage due to the generated oxygen gas. Further, in addition to such a problem, when the liquid bleaching agent is filled, there is also a problem that the contents exude to the surface of the container during long-term storage, resulting in a defective product even when the container is not deformed.

[0004] It is an object of the present invention to provide a liquid bleach product which has practically sufficient durability as a container, and whose contents do not exude to the surface of the container even during long-term storage.

[0005]

Means for Solving the Problems The present inventors set the optimum combination of the electric conductivity of a liquid bleach composition and the material and thickness of a plastic container to be filled with the composition. The present inventors have found that the above objects can be achieved and completed the present invention.

That is, according to the present invention, a liquid bleaching composition containing hydrogen peroxide, a surfactant and a sequestering agent is filled in a plastic container, and the liquid bleaching composition has an electric conductivity at 25 ° C. The plastic container has a thickness of at least one selected from the group consisting of linear low-density polyethylene, low-density polyethylene, unstretched polypropylene, stretched nylon, stretched polypropylene, and polyethylene terephthalate. ~ 50
Liquid bleach articles characterized in that they are of 0 μm.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The liquid bleach composition used in the present invention contains hydrogen peroxide, a surfactant and a sequestering agent.

[0008] Hydrogen peroxide is a component that becomes a bleaching active species, and its content in the composition is preferably 0.1 to 2%.
0% by weight, particularly preferably 0.5 to 10% by weight, more preferably 0.6 to 6% by weight. 0.
The content of 1% by weight or more is for obtaining sufficient bleaching power, and the content of 20% by weight or less is in consideration of economic efficiency.

The surfactant includes at least one selected from nonionic surfactants, cationic surfactants, anionic surfactants and amphoteric surfactants. Among them, the electric conductivity at 25 ° C. is set to 0.1.
Non-ionic surfactants are preferred in order to make it 8 S / m or less.

[0010] Such nonionic surfactants include:
Following general formula ^{(III): R 3 O- (} C 2 H 4 O) n -H (III) [ wherein, R ³ is alkyl having 1 to 12 carbon alkyl or alkenyl group or a C 6 to 18 carbon atoms Represents an aryl group which may be substituted with a group, and n represents a number selected so that the HLB determined by the Davis method in relation to R ³ is 4.3 to 12. ] Can be mentioned. As the nonionic surfactant represented by the general formula (III), the following compounds can be exemplified.

C ₁₀ H ₂₁ (OC ₂ H ₄ ) _n -OH n = _{2 to} 17, HLB = 4.81 to 9.76 C ₁₂ H ₂₅ (OC ₂ H ₄ ) _n -OH n = 4 to 20, HLB = 4.52 to 9.80 C ₁₄ H ₂₉ (OC ₂ H ₄ ) _n -OH n = 7 to 23, HLB = 4.56 to 9.84 C ₁₆ H ₃₃ (OC ₂ H ₄ ) _n -OH n = 10 to 26, HLB = 4.60 to 9.88 C _{18 H 37 (OC 2 H 4} ) n -OH n = 13~29, HLB = 4.64~9.92.

The content of the surfactant in the liquid bleach composition is preferably 1 to 50% by weight, particularly preferably 0.5 to 30% by weight, and more preferably 0.5 to 20% by weight. %. The content of 1% by weight or more is for obtaining a sufficient detergency, and the content of 50% by weight or less is for maintaining an appropriate viscosity for easy use.

As the sequestering agent, JP-A-10-1998
No. 17894, page 7, column 11, line 22 to column 1
2 and line 9 and, for example, the following can be mentioned.

(1) ethane-1,1-diphosphonic acid, ethane-
1,1,2-triphosphonic acid, ethane-1-hydroxy-1,1-diphosphonic acid and derivatives thereof, ethanehydroxy-1,1,2-triphosphonic acid, ethane-1,2-dicarboxy-1,2- Phosphonic acids such as diphosphonic acid and methanehydroxyphosphonic acid, and alkali metal salts or alkanolamine salts thereof; (2) nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethylimino Aminopolyacetic acids such as diacetate, triethylenetetraminehexaacetic acid, diencoric acid and the like or alkali metal salts or alkanolamine salts thereof; (3) diglycolic acid, oxysuccinic acid, carboxymethyloxysuccinic acid, citric acid, lactic acid, tartaric acid, oxalic acid Acid, malic acid, gluconic acid, carboxymethyl succinic acid, mosquito Organic acids such as boxymethyltartaric acid or alkali metal salts or alkanolamine salts thereof; (4) alkali metal salts or alkanolamine salts of aluminosilicic acid represented by zeolite A; One or more selected ones are preferred.

The content of the sequestering agent in the liquid bleach composition is preferably 0.0005 to 5% by weight, particularly preferably 0.01 to 1% by weight. 0.
The content of 0005% by weight or more is for enhancing the detergency, and the content of 5% by weight or less is due to economic considerations.

The liquid bleach composition used in the present invention further comprises a compound represented by the general formula (I) or (II):

[0017]

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[In the formula, R ¹ and R ² represent an alkyl group or alkenyl group having 7 to 18 carbon atoms or an aryl group which may be substituted with an alkyl group having 1 to 12 carbon atoms;
Represents a hydrogen atom, an alkali metal or an alkaline earth metal. The bleaching activator represented by these formulas can be blended.

Among the bleaching activators represented by the general formula (I) or (II), sodium dodecanoyloxybenzenesulfonate, decanoyloxybenzoic acid, octanoyloxybenzoic acid, nonanoyloxybenzoic acid,
3,5,5-trimethylhexanoyloxybenzoic acid and the like are preferred.

The bleach activator is preferably present in the liquid bleach composition in an amount of from 0.01 to 20% by weight, particularly preferably 0.1% by weight.
-10% by weight, more preferably 0.4-10% by weight. The content of 0.01% by weight or more is for obtaining a sufficient bleaching effect, and the content of 20% by weight or less is for preventing precipitation during use.

The liquid bleaching composition used in the present invention may contain water in addition to the above components, and may further contain enzymes, fragrances, antifoaming agents, and the like, which are added to ordinary detergents and bleaching agents.

The liquid bleach composition used in the present invention comprises 25
It has an electric conductivity at 0.8 ° C. of 0.8 S / m or less, preferably 0.6 S / m or less, particularly preferably 0.3 S / m or less. By setting the electric conductivity to a predetermined value or less in this manner, the micelle particle size of the activator itself becomes smaller due to the electric environment around the micelles, and it becomes difficult for the activator to adhere to the inner surface of the container. It is presumed that oozing can be suppressed. In addition, in order to adjust electric conductivity, inorganic ions can be removed by an electrodialysis method or the like.

In the liquid bleaching composition used in the present invention, the total of alkali metal and alkaline earth metal ions is preferably 50 mM or less, and more preferably 30 mM or less, in order to adjust the electric conductivity to a predetermined value or less. It is particularly preferred that there is. For the adjustment of the alkali metal and alkaline earth metal ions, an electrodialysis method can be applied in the same manner as described above.

The pH of the liquid bleach composition used in the present invention
Is preferably 2 to increase the stability of hydrogen peroxide.
5, particularly preferably 2-3.

The plastic container used in the present invention is formed of at least one selected from linear low-density polyethylene, low-density polyethylene, unstretched polypropylene, stretched nylon, stretched polypropylene and polyethylene terephthalate. Also, plastic containers
By appropriately combining the above materials, a laminated structure of two or more layers can be obtained. In the case of a laminated structure of two or more layers, the inner layer and the outer layer can have different properties. For example, those using stretched nylon, stretched polypropylene and the like can be mentioned. Further, the plastic container may be provided with a barrier layer, a pinhole-resistant layer, a tear-inducing layer, and the like.

The plastic film constituting the plastic container can be easily manufactured by a known method. For example, examples of the method for producing a laminated film having two or more layers include a dry lamination method, a T-die method, a co-extrusion lamination method, an inflation method, and a tandem lamination method. Although the form of the plastic packaging container is not limited, it is preferable to use a container formed into a bag (small bag) having a desired capacity by heat sealing the periphery of a plastic film having a desired size.

The plastic container has a heat of 20-500 μm to prevent the contents from oozing out,
Preferably it is 50 to 300 μm.

[0028]

EXAMPLES Production Example 1 Two sets of rectangular shapes were prepared by laminating stretched nylon having a thickness of 20 μm and linear low-density polyethylene having a thickness of 130 μm, each of which was formed into a linear low-density polyethylene having a thickness of 130 μm. Were placed inside, and the three sides were heat-sealed to obtain a small-bag-shaped plastic container (container 1) having a capacity of 1000 ml.

Production Example 2 A pouch-shaped plastic container (Container 2) was obtained in the same manner as in Production Example 1, using stretched polypropylene having a thickness of 30 μm and linear low-density polyethylene having a thickness of 100 μm.

Comparative Production Example 1 Using a stretched nylon having a thickness of 100 μm, a stretched polypropylene having a thickness of 200 μm, and a linear low-density polyethylene having a thickness of 250 μm, a plastic bag-shaped plastic container (container 1) was produced in the same manner as in Production Example 1. ) Got.

Examples 1 to 4 and Comparative Examples 1 to 5 Hydrogen peroxide (manufactured by Nippon Peroxide Co., Ltd.) and a
Table 1 using surfactants -1 to a-3, sequestering agents b-1 to b-6, and bleaching activators c-1 and c-2.
(In% by weight) was obtained.
The electrical conductivity of the composition at 25 ° C. was measured using CONDUCTIVITY METER CM-60S manufactured by Toa Denpa Kogyo KK.

A-1: C ₁₂ H ₂₅ O (C ₂ H ₄ O) ₈ -H a-2: Alkylbenzene sulfonic acid (H type) (Sulfonation completed at the time of producing Neoperex F-25 manufactured by Kao Corporation) A-3: Alkylbenzenesulfonic acid (Na type) (Neoperex F-25 manufactured by Kao Corporation) b-1: Phosphonic acid chelating agent (Monsanto Japan Co., Ltd.) B-2: phosphonic acid chelating agent (manufactured by Nippon Monsanto; Diquest 2016) b-3: citric acid (H type) (Aldrich Co., Ltd.) b-4: citric acid (Na type) B-5: EDTA (H-type) (Aldrich Reagent) b-6: EDTA (Na-type) (Aldrich Reagent)

[0033]

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These liquid bleach compositions were filled in Container 1 or Container 2 to obtain liquid bleach articles of Examples and Comparative Examples shown in Table 1. The resulting liquid bleach article is treated at a temperature of 40
The condition of the container surface when stored for 6 months under constant temperature and humidity conditions of 80 ° C. and a relative humidity of 80% is visually observed, and the state of exudation of the contents onto the container surface is determined according to the following criteria. The stability was evaluated. Table 1 shows the results. 5: Little change is recognized 4: Container surface is slightly wet due to seepage of contents 3: Container surface is wet due to seepage of contents 2: Severe seepage of contents 1 : Container is deformed due to exudation of contents

[0035]

[Table 1]

The liquid bleaching article of the example showed almost no exudation of the contents to the container surface even under the severe conditions of 6 months at a temperature of 40 ° C. and a relative humidity of 80%. Therefore, it was confirmed that there was no problem as a product in the normal distribution and sales process.
In Comparative Example 5, since the container was thick (550 μm), the gas permeability was small, and the container expanded and burst during storage.

[0037]

According to the liquid bleaching article of the present invention, the contents can be prevented from seeping out to the container surface even during long-term storage, so that the storage stability can be enhanced. Therefore, product management in the distribution and sales process of the product is facilitated, and the profit received by the consumer is also increased.

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code FI C11D 3:26 3:36) (72) Inventor Muneo Aoyagi 1334 Minato, Wakayama-shi, Wakayama Pref.

Claims (3)

[Claims] A liquid bleaching composition containing hydrogen peroxide, a surfactant and a sequestering agent is filled in a plastic container, and the liquid bleaching composition has an electrical conductivity of 0 at 25 ° C. 0.8 S / m or less, and the plastic container has a thickness of 20 to 500 μm comprising at least one selected from linear low-density polyethylene, low-density polyethylene, unstretched polypropylene, stretched nylon, stretched polypropylene, and polyethylene terephthalate. A liquid bleach article characterized in that: 2. A compound of the general formula (I) or (II): [Wherein, R ¹ and R ² represent an alkyl group or alkenyl group having 7 to 18 carbon atoms or an aryl group which may be substituted with an alkyl group having 1 to 12 carbon atoms, and M represents a hydrogen atom, an alkali Indicates metal or alkaline earth metal. The liquid bleaching article according to claim 1, comprising a bleaching activator represented by the formula: 3. The liquid bleach article according to claim 1, wherein the total of alkali metal and alkaline earth metal ions in the liquid bleach composition is 50 mM or less.