JPS6054359B2 - liquid cleaning composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to liquid cleaning compositions, and more particularly to liquid cleaning compositions suitable for cleaning metal surfaces, such as open surfaces.

Conventional technology Conventional open cleaners, unlike ordinary household cleaning agents, mainly use strong alkaline substances as the main ingredient because their main purpose is to remove oil stains.Based on this, they have the following drawbacks: There is.

In other words, most open cleaners currently in use have caustic soda as their main ingredient, and therefore have a high pH value of 13.0 or higher, which makes them difficult to handle, especially on the skin.
It has serious drawbacks in practical terms, such as being highly irritating to the eyes and being highly dangerous. In addition, the above cleaning agent is highly corrosive to metals due to caustic soda, and is particularly corrosive to copper, aluminum, etc. inside the open. Therefore, the cleaning agent used can be completely removed by wiping it after use. Otherwise, there is a problem that the durability of the open itself will be reduced.
Problems to be Solved by the Invention It is an object of the present invention to provide a new cleaning composition that eliminates all of the drawbacks found in the conventional open cleaners.

Means for Solving the Problems According to the present invention, 0.5 to 2 mass% of one or more types of inorganic acid metal salts consisting of metal nitrates and metal carbonates, and 0 surfactant.
．． A liquid cleaning composition is provided, comprising 2 to 5% by weight of a thickening agent and having a pH in the range of 7 to 10.

As mentioned above, the cleaning composition of the present invention has a pH value of 7 to 1.
It is in the neutral to slightly alkaline range of 0, and therefore has no or very weak irritation to the skin, eyes, etc., is highly safe and extremely convenient to handle, and is highly effective against any of the various metals commonly used. It has no or very weak corrosive properties, and there is no risk of damaging or rusting the opening.

Moreover, the cleaning power produced by its application is extremely strong, comparable to that of conventional cleaning agents of this type. The inorganic acid metal salt constituting the liquid cleaning composition of the present invention is selected from metal nitrates and metal carbonates.

Specific examples of compounds belonging to the inorganic acid metal salts include potassium nitrate, sodium nitrate, potassium carbonate,
Examples include sodium carbonate, sodium sesquicarbonate, and sodium hydrogen carbonate. Even if each of these compounds is used alone, it can exhibit the cleaning effect desired by the present invention, but when two or more of these compounds are used in combination, a synergistic effect can be expected, resulting in even more excellent cleaning. It is effective, and can be expected to have a particularly effective cleaning effect on a wide variety of dirt components. The above-mentioned inorganic acid metal salt is preferably contained in the composition of the present invention in a range of 0.5 to 20% by weight, and the above-mentioned effects can be achieved by using the above-mentioned inorganic acid metal salt within this range. The surfactant constituting the composition of the present invention may be any of anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants.

Among these, it is preferable to select and use those that have strong penetrating power in neutral to weakly alkaline conditions, those that are stable over time, and those that enhance adhesion to dirt components. Such preferable surfactants include, for example, anionic surfactants such as higher alcohol sulfate salts, dialkyl sulfosuccinate salts, alkyl phosphate salts,
Examples include secondary higher alcohol sulfate ester salt, α-olefin sulfonate, polyoxyethylene alkyl phenyl ether sulfate, polyoxyethylene alkyl ether sulfate, and secondary higher alcohol ethoxy sulfate. Examples of nonionic surfactants include polyoxyethylene alkyl ether, secondary higher alcohol ethoxylate, polyoxyethylene alkylphenyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester,
Polyethylene glycol fatty acid ester, polyoxyethylene fatty amine, fatty acid monoglyceride. Examples include sorbitan fatty acid ester, propylene glycol fatty acid ester, and sucrose fatty acid ester. Examples of cationic surfactants include quaternary ammonium salts, and examples of amphoteric surfactants include alkylglycine. Examples include type, betaine type, and imidazoline type. Although each of the above-mentioned surfactants can be used alone, it is usually preferable to use two or more kinds together.

The amount used is preferably 0.2 to 5% by weight in the composition of the present invention, and by using it within this range, the intended purpose of the present invention can be achieved. The composition of the present invention contains a thickener along with the predetermined amounts of the inorganic acid metal salt and surfactant.

Typical examples of this thickener include xanthan gum, which has the effect of increasing the adhesion of the inorganic acid metal salt and surfactant to dirt components and sufficiently exhibiting cleaning properties. The amount of the thickener used varies depending on the type of thickener, but usually 1% by weight or less provides a sufficient effect. The composition of the present invention is usually prepared and used in the form of an aqueous liquid containing the above-mentioned components, but an organic solvent can be further added to this aqueous liquid. Depending on the type of dirt components such as open stains, the cleaning performance can be further improved.

Examples of the organic solvent include higher alcohols and polyhydric alcohols. The amount added is preferably 1% by weight or less. The liquid cleaning composition of the present invention can be applied, for example, by applying an appropriate amount to the object to be treated, heating it, and wiping it off after cooling.

In particular, the composition of the present invention exhibits an excellent cleaning effect by applying the composition to an open space and raising the temperature inside the open space, and is therefore very useful as an open cleaner. EXAMPLES Next, examples will be given to explain the present invention more clearly.

In each example, % and parts indicate weight % and parts by weight. Example 1 Potassium nitrate 5.6% Sodium nitrate 1.4% Xanthan gum 0.1% Sodium dioctyl sulfosuccinate 0.7% Polyoxyethylene (15)
Lauryl ether ester 0.4% water
A liquid detergent composition of the present invention was obtained by adding and blending predetermined amounts of each of the above components to make the total 100%.

Its pH was 8.2. Example 2 Potassium carbonate
3.6% sodium bicarbonate
5.4% xanthan gum
0.1% polyoxyethylene (15) lauryl ether sulfate 0.85% lauryl dimethyl ammonium chloride
A liquid detergent composition of the present invention was obtained by adding and blending predetermined amounts of each of the above-mentioned components: 0.15% water (total 100%).

Its pH was 8.1. Example 3 Potassium nitrate
2.1% potassium carbonate
2.1% sodium bicarbonate
2.8% xanthan gum
0.2% lauryl betaine 0.7
5% Sodium polyoxyethylene lauryl ether sulfate 0.25% Water Amounts to make the total 100% Predetermined amounts of each of the above components were added and blended to obtain a liquid detergent composition of the present invention.

Its pH was 9.6. Example 4 Potassium nitrate
5.5% sodium nitrate
1.0% sodium bicarbonate
0.5% xanthan gum
0.1%-polyoxyethylene (11) nonylphenyl ether 1.0% lauryl betaine
1.2% water
A liquid detergent composition of the present invention was obtained by adding and blending predetermined amounts of each of the above components to make the total 100%.

Its pH was 7.9. Experimental Example 1 A detergency test of the cleaning composition samples prepared in each of the above Examples was conducted as follows.

How to create artificial stains> (1) Artificial stains I Apply salad oil (harvest salad oil, edible rapeseed oil, edible soybean oil mixture) to a stainless steel plate,
Heat at C for 1 hour to remove oil stains.

(2) Artificial stain ■ Apply the following artificial stain A to the stainless steel plate and apply it for 24 hours.
Baking was performed by heating at 0 to 260°C for 1 hour.

Artificial stain A is beef tallow and egg yolk 3? , starch 1? , salt 1
1 part monosodium glutamate and 3 parts water. was made into a paste in a mortar. Cleaning method> The following method was used.

1. After applying a cleaning agent sample to a stainless steel plate with artificial stains on it, the plate is placed in an open oven and the temperature is raised (200 to 240°C).

The temperature is raised for 2 hours per batch, and then allowed to cool to room temperature.

3 After cooling, wipe off the cleaning agent sample with a wet towel.

Method for Judging Cleaning Effect>1 Cleaning Power The cleaning power of each sample is examined by visual judgment, and the completely cleaned sample is taken as 100%, and the evaluation is made as a percentage.

2PH value The pH of each sample solution is measured using a Hitachi Ichihoriba PH meter F-7.

3. Submerge approximately half of each metal plate made of aluminum, copper, stainless steel, brass, galvanized iron, and tin into the sample solution of a corrosive cleaning agent for three metals.
The corrosion properties of each metal plate over time are determined with the naked eye, centering around the interface, and evaluated according to the following criteria.

Judgment criteria: 8...No change at all: O...Cleaning liquid turns brown
:Δ・・・The metal piece is discolored ×・
...corroded <Test results> The results of the above detergency test are shown in Table 1 below.

For comparison, Table 1 lists each of the following commercially available cleaning agents:
The test results for each product when used according to the directions for use are also listed. Commercial product A... Caustic soda 3.5%
Containing aerosol commercial product B... Caustic soda 4.1
% containing aerosol and the PH value of each of the above sample solutions and the results of the metal corrosion test (after 1 day, 3 days and 1 week),
It is shown in Table 2 below.

Commercially available products A and B in Table 2 are the same as those in Table 1. According to the above tables, the liquid cleaning composition of the present invention has excellent cleaning effects and other effects, and is superior to known cleaning agents in terms of safety and metal corrosion. That is clear.

Claims (1)

[Claims] 1 Contains 0.5 to 20% by weight of one or more types of inorganic acid metal salts consisting of metal nitrates and metal carbonates, 0.2 to 5% by weight of a surfactant, and a thickener, and has a pH in the range of 7 to 10. A liquid cleaning composition comprising: