JPH0823040B2 - Decontamination cleaner - Google Patents

Description

Description: [Field of Industrial Application] The present invention relates to a stain removing detergent used for removing stains such as water stains attached to the outer surface of an automobile body.

[Problems to be Solved by Conventional Techniques and Inventions] Conventionally, in order to remove stains such as scales adhering to the outer surface of a vehicle body of an automobile, the stains are abraded by using a cleaning agent containing an abrasive. The method of letting is used. Three types of cleaning agents containing this abrasive are known. One is the solvent type, in which the abrasive is dispersed in a petroleum solvent with a dispersant, or the abrasive is added to the petroleum solvent together with a thickener to form a gel, which prevents the abrasive from settling. It is a thing. Further, one is a water-dispersed type, in which a detergent surfactant is added to a dispersion of an abrasive in water with a surfactant or the like, and a thickener is further added as necessary to form a gel, It prevents the settling of the abrasive. The other is an emulsion type, which is an O / W type emulsion such as a petroleum solvent, to which an abrasive is added together with a thickener to prevent the abrasive from settling.

However, even if any of the above-mentioned cleaning agents can remove dirt, since it is abrasion removal with an abrasive, there remains a problem that the coating on the outer surface of the vehicle body is also worn at the same time.

On the other hand, as a stain removing cleaner that does not use an abrasive, a cleaner containing soaps, surfactants, alkalis and special solvents as main components has also been proposed. However, it is generally difficult to remove the dirt attached to the outer surface of the car body with such a cleaning agent, and conversely, it is not possible to use a strong alkali or a radical solvent to remove the dirt. However, it is clear that it not only adversely affects the painted surface but also harmful to the human body, and no one that can withstand use has been obtained.

An object of the present invention is to solve the above-mentioned problems and to provide a stain removing cleaner which can remove stains without adversely affecting the surface to be cleaned and which is safe and harmless to the human body. is there.

[Means for Solving the Problems] In order to achieve the above objects, the dirt removing cleaning agent of the present invention is configured as follows.

A self-emulsifying surfactant was added to a petroleum-based solvent to prepare a self-emulsifying oil, and liquid soap, an adsorbent thickener, kaolin as an adsorbent, and water were added thereto.

Further, an airgail spray type is prepared by mixing the above-mentioned stain removing detergent with a liquefied gas for ejection.

[Detailed Description of Means] Examples of the petroleum solvent include kerosene, odorless solvent, white oil, liquid paraffin, etc., and aromatic solvents, chlorine solvents, highly volatile solvents, etc. are toxic to the human body. It is preferable not to use it.

Examples of the self-emulsifying surfactant include nonionic surfactants such as polyethylene glycol ester, polyoxyethylene alkylphenyl ether, polyoxyethylene nonylphenyl ether, and sorbitan fatty acid ester. The self-emulsifying oil agent emulsified with the self-emulsifying surfactant is preferably one which maintains a stable emulsified state even when the oil agent is diluted 40 to 50 times with water.

Examples of the liquid soap include sodium oleate, potassium oleate, sodium laurate, potassium laurate, potassium oruyl laurate which have good solubility even at low temperatures, and these may be used alone or in admixture of two or more. It can be used as an aqueous solution.

Examples of the thickener having adsorptivity include carboxymethyl cellulose, hydroxyethyl cellulose, montmorillonite and the like.

Examples of the adsorptivity include kaolin. This is a dirt adsorbent for preventing the dirt once removed from reattaching to the painted surface or the like. In addition to kaolin, activated clay has the same adsorptivity, but its particle size is 1 μm like kaolin.
There is no ultrafine particle as described below, and the use of this is not suitable for the present invention because it will damage the coated surface because the particle is coarse.

Examples of the jetted liquefied gas include butane-propane mixed gas and carbon dioxide gas.

[Operation] When the above-mentioned stain removing cleaning agent is applied to the surface to be cleaned, the liquid soap takes in the dirt attached to the surface to be cleaned and turns it into a colloid. Further, the petroleum solvent dissolves dirt adhered to the surface to be cleaned and is colloided with the dirt by liquid soap, a surfactant for self-emulsification, etc., and removes the dirt from the surface to be cleaned. The colloidal dirt is adsorbed by the thickening agent having an adsorbing property and kaolin as the adsorbing agent by a synergistic action, and is prevented from being redeposited on the surface to be cleaned. Then, the adsorbed dirt is completely removed from the surface to be cleaned together with the adsorbent and the like by washing with water or the like.

In addition, the cleaning agent is effectively foamed by making the dirt removing cleaning agent into an aerosol spray type, and since the liquid soap and the surfactant for self-emulsification are arranged on the outermost surface of the foam, Cleaning is done effectively.

[Examples 1 to 3 and Comparative Examples 1 to 5] Examples in which the stain removing detergent of the present invention is embodied will be described below in comparison with Comparative Examples.

Table 1 below shows the compounding recipes (% by weight) of Examples 1 to 3. The preparation of each cleaning agent is as follows. That is, a self-emulsifying surfactant is mixed with a petroleum solvent with stirring to form a self-emulsifying oil. On the other hand, an aqueous solution prepared by adding a cellulose-based, montmorillonite-based adsorbent thickener and kaolin as an adsorbent to an aqueous solution of liquid soap,
This is mixed with the self-emulsifying oil agent with stirring to obtain an emulsion. Furthermore, this emulsion is mixed with a mixed liquid of an anionic surfactant and a nonionic surfactant and the remaining water,
Used as a dirt removal cleaning agent.

Here, the anionic surfactant and the nonionic surfactant are mixed because the fatty acid liberated when the liquid soap is hydrolyzed is solubilized in water, and the permeability and detergency of the dirt removing detergent are And to complement the emulsifiability.

Examples of the anionic surfactants include sodium alkylbenzene sulfonate, sodium lauryl sulfate, potassium lauryl sulfate, and sodium mistyl sulfate. Examples of the nonionic surfactants include coconut oil fatty acid monoethanolamide, polyethylene glycol fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene alkylphenyl ether.

Further, Tables 2 and 3 below show the formulations of Comparative Examples 1 to 5. These are adjusted according to a conventionally known method.

Examples 1 to 3 and Comparative Examples 1 to 1 adjusted as described above
Regarding No. 5, foaming property and defoaming property as a dirt removing detergent,
Washability, dirt removability, workability, paint abrasion, paint discoloration,
A test for skin irritation was performed. The test method will be described below.

(Test method) Leave a white-painted passenger car in the open air for about 3 months so that the painted surface is covered with dirt (water stain). This dirt is so stubborn that it cannot be removed by rubbing it with a cloth soaked with kerosene, and it cannot be removed by rubbing it with a brush after adding water to the laundry detergent. Is.

The test was carried out by adhering 5 g of the sample to a sponge together with an appropriate amount of water, lightly rubbing the dirt on the coated surface as described above, and observing the condition of the coated surface at that time. At the same time, the above-mentioned test items were evaluated in three stages according to the following points. The evaluation method of each test item is described below.

(Evaluation of foaming property) ○: Foams well and the foaming state continues until the dirt is removed.

△: Bubbles disappear during dirt removal.

X: Little foaming from the beginning.

(Evaluation of defoaming property) O ... Defoaming is performed at an appropriate time after washing.

Δ: There are many bubbles even after washing.

×: Bubbles do not disappear even after washing, which hinders washing with water.

(Evaluation of Washability) O ... Contamination can be completely removed by washing with water even after the water has once evaporated after washing.

Δ: When washed in the same manner as above after washing, foaming occurs and it is difficult to wash with water.

X: Even if the same washing with water is performed after the washing, dirt is reattached and the finish is not clean.

(Evaluation of removability of dirt) ○: dirt can be easily removed.

Δ: Dirt can be removed by using a large amount of cleaning agent and rubbing it strongly.

×: Insufficient removal of dirt, and redeposition of dirt in some cases.

(Evaluation of workability) ○: Decontamination is reliable and easy to wash with water, and even when wiping off, it can be wiped off smoothly without squeezing the painted surface.

Δ: It is slightly difficult to remove dirt, wash with water or wipe off.

×: It takes time to remove dirt, wash with water and wipe off.

(Evaluation of degree of paint wear) After cleaning, wear marks on the paint surface were observed with a 20 times magnifying glass.
Note that this test item requires special attention for those containing an abrasive.

○: No wear marks are observed.

Δ: A slight abrasion mark is recognized.

X: A wear mark is clearly recognized.

(Evaluation of paint discoloration) The color tone and gloss of the original coated surface without stains were compared with the color tone and gloss of the coated surface after washing. still,
This test item requires special attention if it contains a strong alkali or a solvent with a strong dissolving power for the resin.

◯: The color tone and gloss are not adversely affected.

Δ: The gloss was slightly deteriorated.

×: The color tone changed and the gloss deteriorated.

(Evaluation of skin irritation) After 24 hours from the washing work, it was observed whether or not abnormality was observed on the skin such as hands. It should be noted that this test item requires special attention for those containing a strong alkali or a solvent having a strong dissolving power for the resin.

○: No abnormality is found on the skin.

Δ: The skin became dry and the hands became dry.

×: Abnormalities such as tingling, redness and itching of the skin were observed.

The above-mentioned test results for Examples 1 to 3 and Comparative Examples 1 to 5 are shown in Tables 4 and 5.

Since Comparative Examples 2 and 5 are compounding formulations in which no foaming occurs, evaluation of foamability, defoaming property and water washability has not been performed.

As can be seen from Table-4, Examples 1 to 3 showed extremely good results in all test items. On the other hand, the table
In Comparative Examples 1, 2 and 5 in which fine particles of silicon oxide were used as the abrasive as shown in FIG. 5, abrasion of the coated surface was observed, although the stain removability was good. Further, in Comparative Example 4 in which sodium silicate was used as the alkaline agent, discoloration of the coated surface and abnormalities of the operator's skin were observed. On the other hand, Comparative Example 3 including soaps, surfactants and thickeners has no noticeable defects in general, but satisfactory results were not obtained in terms of water washability, dirt removal property and workability.

From the above test results, it is understood that Examples 1 to 3 show good results in all the test items as described above by using the petroleum solvent, the soaps and the adsorbent together.

It is considered that the stain removing cleaning agent of the above-mentioned embodiment acts as follows. That is, of the dirt removing detergent applied to the painted surface of the vehicle body, the soap component takes in minor dirt that is attached to the painted surface and turns it into a colloid.
Also, the petroleum solvent that was in the emulsified state spreads on the coated surface and dissolves the relatively stubborn dirt, and it is colloided again with the dirt by the action of various surfactants. To be removed.

The thus colloidal dirt is adsorbed by the cellulose-based or montmorillonite-based adsorptive thickener and kaolin as the adsorbent, and the dirt cannot be reattached to the painted surface. The above-mentioned thickener and adsorbent that have adsorbed dirt can be easily removed from the coated surface by washing with water or the like.

It should be noted that even if kaolin is used alone as an adsorbent, reattachment of dirt cannot be sufficiently prevented, and it is sufficient to use the above-described cellulose-based or montmorillonite-based adsorbent thickener in combination. It has been confirmed that it exhibits excellent adsorptivity.

As described above, according to the dirt removing cleaning agent of the present embodiment, extremely excellent dirt removing property is exhibited without using an abrasive or an alkaline agent, and there is no drawback that the painted surface is abraded or discolored. . Further, it does not harm the skin of the user, has excellent foaming properties, defoaming properties, and water washability, and has the advantage of being easy to work.

Next, the blending ratio of each component in the above-mentioned examples will be described.

The blending ratio of the above petroleum solvent is 5 to 25 in the stain removing detergent.
% By weight is preferred. If the mixing ratio is less than 5% by weight, the effect of removing dirt is not obtained, and if it exceeds 25% by weight, a stable aqueous dispersion cannot be obtained.

The mixing ratio of the self-emulsifying surfactant is preferably 1 to 6% by weight in the stain removing detergent. The same proportion is 1% by weight
If it is less than 6, it is difficult to emulsify the petroleum-based material, and if it exceeds 6% by weight, the breakage of bubbles during washing becomes worse.

The mixing ratio of the liquid soap is preferably 10 to 20% by weight in the stain removing detergent. If the mixing ratio is less than 10% by weight, the foaming property and detergency as a dirt removing cleaning agent are deteriorated, and if it exceeds 20% by weight, foam breakage during cleaning is deteriorated.

The admixture ratio of the thickener having adsorptivity is preferably 1 to 2% by weight in the stain removing detergent. Within the range of the same mixing ratio, the stain removing detergent can maintain a viscosity that is easy to use.

The compounding ratio of kaolin having the above adsorptivity is preferably 1 to 2% by weight in the stain removing detergent. The above-mentioned adsorptivity is due to the synergistic action of kaolin and the above-mentioned adsorptive thickener, and in the range of 1 to 2% by weight in relation to the blending ratio of the above-mentioned adsorptive thickener. Adhesion of dirt is enhanced.

Further, the mixing ratio of the anionic surfactant and the nonionic surfactant added last is preferably in the range of 1/2 to 2/1.

It should be noted that, in addition to the compounding components of the above-mentioned examples, the following compounds may be contained in order to impart preferable properties according to a specific purpose. That is, polyhydric alcohol, thickener, fluorine compound, antibacterial agent, sequestering agent, fragrance, pigment, foaming agent, defoaming agent, silicone oil,
Examples include waxes, water retention agents, rust preventives, and alkaline agents.

Further, the dirt removing cleaning agent of the above-mentioned embodiment may be filled in a spray can together with the liquefied gas for ejection to form an aerosol spray type cleaning agent. By using such an aerosol spray type, the cleaning agent is effectively foamed,
Soaps and other surfactants are arranged on the outermost surface of the foam. Therefore, the surface to be cleaned is effectively cleaned with soaps and other surfactants, and the effect as a dirt removing cleaner is enhanced.

[Advantages of the Invention] As described in detail above, according to the dirt removing cleaning agent of the present invention, by applying the cleaning agent to the surface to be cleaned, the surface to be cleaned is not adversely affected such as abrasion of the surface to be cleaned. It has an excellent effect that it can remove dirt and is harmless to the human body.

In particular, when the dirt removing detergent is made into an aerosol spray type, it has an excellent effect that the washing property is further improved.

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Claims (2)

[Claims] 1. A self-emulsifying oil agent is prepared by blending a self-emulsifying surfactant with a petroleum solvent, and a liquid soap,
A dirt removing detergent comprising a thickener having absorbability, kaolin as an adsorbent, and water. 2. A decontamination detergent comprising the decontamination detergent according to claim 1 mixed with a liquefied gas for ejection to form an aerosol spray type.