JPH0739596B2 - Liquid bleach composition - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a liquid bleaching composition containing hypochlorite, and more specifically, gas generation due to decomposition of hypochlorite even when stored for a long period of time. The present invention relates to a liquid bleach composition which is suppressed as much as possible and prevents swelling and bursting of a plastic container.

2. Description of the Related Art Conventionally, as a liquid bleach composition, a hypochlorite, particularly a sodium salt, is used as a bleaching agent. Aqueous solution of hypochlorite has excellent bleaching power at low temperature, and usually 5 to 6% by weight of sodium hypochlorite is filled in a plastic bottle made of soft plastic such as polyethylene having high sealing property, Widely marketed as a household bleach.

Problems to be Solved by the Invention However, when the hypochlorite aqueous solution is filled in a soft plastic bottle such as polyethylene and stored, particularly when stored at a high temperature for a long time, the hypochlorite is decomposed to generate oxygen. Gas is generated, and the pressure in the bottle rises due to this oxygen gas, which may cause problems such as the liquid content popping out when the bottle cap is removed, and the bottle, especially its bottom, swells or bursts. .

When a glass bottle is used to avoid this problem, it is possible to prevent the container from bulging, but the glass bottle has drawbacks such as being weak against impact and being heavy. Further, a metal container such as a tin can has problems such as rust and corrosion, and is not suitable as a container for a hypochlorite type liquid bleaching agent composition.

The present invention has been made in view of the above circumstances, the hypochlorite is stably maintained for a long time even at high temperatures, and does not swell or rupture the container even when filled and stored in a soft plastic container. It is an object to provide a liquid bleach composition.

Means and Actions for Solving the Problems That is, the present inventors filled a soft plastic container with a liquid bleaching composition containing hypochlorite as a bleaching agent, and even when it was stored at high temperature for a long time. As a result of intensive studies on a liquid bleach composition in which a container does not swell or burst, specific fragrances such as citronellol, dimethyloctanol, hydroxycitronellol, mugol, myrcenol, terpinolene, ethyl-2-methylbutyrate, and phenylpropionate were obtained. Alcohol, Garaku Solid, Tonalid, Rose Oxide, Linalool Oxide,
2,6-Dimethyl-3-octanol, tetrahydroethyl linalool, tetrahydroethyl linalyl acetate, ortho-secondary butyl cyclohexyl acetate and isolone diforene epoxide surprisingly have the effect of stabilizing hypochlorite, When a perfume and hypochlorite are used in combination, the decomposition of hypochlorite is suppressed, and a liquid bleaching agent composition containing hypochlorite is filled in a soft plastic container such as polyethylene and the like. The present inventors have completed the present invention by discovering that swelling and rupture of a soft plastic container can be reliably prevented even when stored at high temperature for a long period of time.

Incidentally, it has been conventionally known to improve the feeling of use of a liquid bleaching composition containing a hypochlorite as a bleaching agent and to add a fragrance to prevent chlorine odor (Japanese Patent Publication No. 54-25514). Japanese Laid-Open Patent Publication No. 52-69415) discloses that the above fragrance component has an effect of stabilizing hypochlorite, and that these fragrances are compounded in a liquid bleaching composition. The present inventors have for the first time found to improve the stable production of acid salts.

Hereinafter, the present invention will be described in more detail.

The liquid bleach composition of the present invention has an effective chlorine amount of 2 to 8
% (Wt%, the same applies below) with 0.1 to 3% hypochlorite
Alkaline substance, 0.05-5% surfactant, 0.00
1 to 1% of the following perfume ingredients, namely citronellol, dimethyloctanol, hydroxycitronellol, mugol, myrcenol, terpinolene, ethyl-2-methylbutyrate, phenylpropyl alcohol, galactolid, tonalid, rose oxide, linalool oxide, 2,6 -Dimethyl-3-octanol, tetrahydroethyl linalool, tetrahydroethyl linalyl acetate, ortho-secondary butyl cyclohexyl acetate, and one or more selected from isolone diforene epoxide, characterized in that it is characterized by containing. .

In this case, sodium salt is suitable as the hypochlorite. The amount of the hypochlorite used is 2 to 8%, preferably 4 to 6%, of the total composition as effective chlorine.
As the alkaline substance, one or more of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium metasilicate, sodium tripolyphosphate and the like can be used. Of these, sodium hydroxide is preferably used. The content of these alkaline substances is 0.1 to 3% of the total composition, preferably 0.2 to
2%. Furthermore, it is preferable that the surfactant stably dissolves the perfume component in the aqueous solution of hypochlorite and does not accelerate the decomposition of hypochlorite, particularly sodium polyoxyethylene nonylphenyl ether sulfate and alkyldiphenyl oxide. Sodium disulfonate and the like are preferably used. In this case, the compounding amount is 0.05 to 5 of the whole composition.
%, And preferably 0.1 to 3%.

The bleach composition of the present invention has the following perfume ingredients, namely citronellol (3,7-dimethyl-6-octene-1-), in addition to the above-mentioned ingredients.
All,) Dimethyloctanol (3,7-Dimethyloctanol, Hydroxycitronellol (3,7-Dimethyloctane 1,7
-Diol, Mugor (3,7-dimethyl-4,6-octadien-3-ol, Myrcenol (2-methyl-6-methylene-7-octen-2-ol, Terpinolene (p-menta-1,4 (8) -diene, Ethyl-2-methylbutyrate Phenylpropyl alcohol Garaku Solid (1,3,4,6,7,8-hexahydro-4,6,6,
7,8,8-hexamethylcyclopental-2-benzopyran, Tonalid (7-acetyl-1,1,3,4,4,6-hexamethyltetrahydronaphthalene, Rose oxide Linalool oxide 2,6-dimethyl-3-octanol Tetrahydroethyl linalool Tetrahydroethyl linalyl acetate Ortho secondary butyl cyclohexyl acetate Isolone diforene epoxide One or two or more selected from
As described above, these fragrance components keep the aqueous solution of hypochlorite stable and suppress the generation of oxygen gas.

In this case, fragrance components other than the fragrance components, for example, chain terpene alcohols such as linalool, geraniol, and nerol, cyclic terpene alcohols such as menthol and borneol, oxides such as cineol, and hydrocarbons such as α-pinene. Although the fragrance component is structurally similar to the fragrance component of the present invention, it has almost no effect of suppressing the generation of oxygen gas.

The blending amount of the fragrance component can be appropriately determined depending on the application, use conditions, etc., but is 0.001 to 1% of the total composition, and particularly 0.1 to
It is preferably 0.5%. If it is less than 0.001%, the effect of suppressing oxygen gas generation is not sufficient, and if it is more than 1%, the stability of hypochlorite tends to be impaired.

In the present invention, in addition to the above-mentioned fragrances, other fragrances and other various components may be added as long as the stability of the hypochlorous acid aqueous solution is not impaired.

The liquid bleaching composition of the present invention can be filled in various containers, but since hypochlorite is stably present, a container such as a bottle made of polyolefin such as polyethylene or other soft plastic is particularly effective as the container. Used for.

Effect of the Invention The liquid bleaching composition of the present invention contains an alkaline substance, a surfactant and a specific perfume component in an aqueous solution of hypochlorite, thereby improving the stability of the aqueous solution of hypochlorite,
Therefore, even if this composition is stored in a soft plastic container for a long period of time, the generation of oxygen gas is reliably suppressed, and the expansion and rupture of the container are prevented.

Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

[Examples and comparative examples]

A liquid cleaning bleaching composition having the following composition was prepared using each of the various fragrances shown in the following table, and subjected to the following test.

Sodium hypochlorite (as effective chlorine amount) 5% Polyoxyethylene phenyl ether 1〃 Sodium sulfate (p = 8) Sodium hydroxide 1〃 Perfume ingredient 0.1〃 Water Balance meter 100% Test method (1) Bottle swelling 600 ml of the above bleaching agent composition was filled and sealed in a polyethylene cylinder bottle (bright bottle: full volume 725 ml, bottom wall thickness 0.6 mm) shown in Fig. 1 (A) and stored in a constant temperature bath at 50 ° C for 5 days. After that, it was taken out and the swelling of the cylinder bottle was visually observed. Note that FIG. 1 (A) shows a bottle in a normal state, and the bottom portion 2 is in a state of being recessed inward. Also,
FIG. 1 (B) shows an inflated cylinder bottle 1,
It shows an example in which the bottom portion 2 bulges outward.
Here, the evaluation criteria for the bulge of the bottle are the following pains.

Evaluation Criteria ◯: No change [FIG. 1 (A)] Δ: The bottom of the bottle swells slightly, and the sitting of the bottle becomes poor.

×: The bottom of the bottle swells and the bottle collapses (in addition, 0.6 kg /
This state occurs when the internal pressure is cm ² or more) [Fig. 1 (B)].

(2) Amount of generated gas As shown in FIG. 2, a stopper 3 is attached to the mouth of a cylinder bottle 1, a rubber tube 5 equipped with a pinch cock 4 is provided, and the gas generated in the bottle 1 is graduated into a graduated cylinder 6. It was collected inside by the water displacement method and weighed.

When measuring the amount of generated gas, after filling the bottle 1 with the bleaching agent composition, the pinch cock 3 is closed and the bottle is stored in a constant temperature bath at 50 ° C. for 24 hours. After that, remove it to the outside,
The gas generated by cooling to 0 was measured by the water replacement method.

The above results are also shown in the table.

From the results shown in the table, it is recognized that the bleaching agent composition containing the perfume of the present invention (Example) is extremely stable, while the bleaching agent composition containing the perfume other than the present invention is unstable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (A) and FIG. 1 (B) are side views showing a polyethylene cylinder bottle filled with a liquid bleaching agent composition, and FIG. It is the schematic which shows an example of an apparatus.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C11D 7/24 7/26 D06L 3/08 7199-3B

Claims (2)

[Claims] 1. An effective chlorine content of 2 to 8% by weight of hypochlorite, 0.1 to 3% by weight of an alkaline substance, and 0.05 to 5
% By weight of surfactant and 0.001 to 1% by weight of the following fragrance ingredients: citronellol, dimethyloctanol, hydroxycitronellol, mugol, myrcenol, terpinolene, ethyl-2-methylbutyrate, phenylpropyl alcohol, galactolid, tonalid, rose. Oxide, linalool oxide, 2,6-dimethyl-
A liquid bleach composition comprising one or more selected from 3-octanol, tetrahydroethyl linalool, tetrahydroethyl linalyl acetate, ortho-secondary butyl cyclohexyl acetate and isolone diforene epoxide. 2. The liquid bleaching composition according to claim 1, which is filled in a soft plastic container.