JPH0226678B2 - - Google Patents

Description

[Detailed description of the invention]

B. Object of the Invention Industrial Field of Application The present invention relates to a composition for cleaning vehicles using a gate-type car wash machine, and particularly to a cleaning agent that is highly effective in removing water scale stains. This is related. Conventional technology In recent years, paid car washes using so-called brushing-type gate-type car wash machines have rapidly become popular at gas stations.Technological innovations have been made to allow waxing to be applied at the same time as the car wash, and gate-type car washes will become more common in the future. It is thought that the use of this machine will increase. By the way, the vehicle cleaning agent used in this gate-type car wash machine has traditionally been an aqueous cleaning agent containing cationic surfactants, anionic surfactants, nonionic surfactants, etc. as main ingredients. In addition, alkaline cleaning agents containing silicates, tripolyphosphates, etc. have also been developed. Problems to be Solved by the Invention When the above-mentioned cleaning agent is used to wash the vehicle using a gate-type car wash, dust and mud are removed from the vehicle, but so-called water scale stains are hardly removed. Therefore, if you constantly repeat washing and waxing using this gate-type car wash, water stains will gradually accumulate, reducing the gloss of the entire car and making the color look dull and spoiling the beauty of the car. It becomes. Furthermore, if there is water scale stains, the wax cannot be applied sufficiently when using a gate-type car wash, resulting in poor water repellency and difficulty in achieving gloss. To remove this water stain, you have to scrub it off by hand, which takes a lot of effort and time.
The current situation is that many people avoid using this type of car washing method. In view of the above circumstances, the present inventors conducted research to obtain a cleaning agent that can remove water scale stains using a gate-type car wash machine, and filed a patent application in November 1980 (Patent Application No. 234294-1982). No. 1), they arrived at the invention of ``water stain cleaning composition for gate-type car wash machines.'' The invention of the previous application contains an abrasive, a surfactant, and a solvent that meet specific conditions as essential components in water, and had an extremely excellent water stain removal effect. However, the previous application contains a considerable amount of solvent in order to stably emulsify the cleaning agent, and if it is discharged as is, it will cause a water pollution problem. There is a problem that there is a need to
Furthermore, there is the problem of flammability due to this solvent, which poses problems in terms of pollution prevention and safety. The purpose of the present invention is to solve the above-mentioned problems of the previous application, and to develop a cleaning composition for gate-type car wash machines that can remove water scale stains without using an organic solvent. B. Structure and operation of the invention The structure of the present invention is a cleaning agent for cleaning vehicles used in a brushing-type gate-type car wash machine, in which a thickener and a particle size are mixed in water or an aqueous surfactant solution. The gist of the present invention is a water scale cleaning composition for a gate-type car wash machine, which is characterized in that it contains an abrasive having a particle size of 0.1 to 5μ and a Mohs hardness of 2 to 6. Means for Solving the Problems After various studies were conducted to obtain a substance that could replace the solvent in the invention of the previous application, it was discovered that very excellent results could be obtained by incorporating a thickener. Furthermore, in this case, a surfactant is not necessarily necessary, and if an abrasive that meets specific conditions is mixed with the water and the viscosity is adjusted to an appropriate level using a thickener, it can be used as a cleaning agent for gate-type car washes to eliminate water scale stains. It has been found that this is a very suitable composition that can be removed. It goes without saying that the addition of a surfactant provides more favorable results in terms of stability and other aspects. In other words, the composition of the present invention contains water, an abrasive, and a thickener as essential components, preferably a surfactant, and the abrasive in this composition satisfies the following specific conditions. It has become something to do. The abrasive compounded in the composition of the present invention has a particle size of 0.1 to 5μ and a Mohs hardness of 2 to 6.
Even if the particle size is within this range, the Mohs hardness is 2.
If it is outside the range of ~6, it is unsuitable, and similarly, even if the Mohs hardness is within this range, if the particle size is outside the range of 0.1 to 5μ, it is an unsuitable abrasive. If the particle size of this abrasive is within the range and a hard abrasive with a Mohs hardness exceeding 6 is used, the hardness will be too large and it will cause countless scratches on the painted surface of the vehicle, significantly reducing the gloss and damaging the painted surface. This accelerates deterioration, causes blurring, and scrapes off the edges of the vehicle, causing significant damage to the vehicle and its painted surface. On the other hand, a soft abrasive having a particle size within this range and a Mohs hardness of less than 2 has almost no effect in removing water stains. If the Mohs hardness of this abrasive is within the range and the particle size is larger than 5μ, it will have a great effect on removing water scale stains, but as with the case of high hardness mentioned above, it will damage the painted surface and reduce the gloss and shine. This will accelerate the deterioration of the paint. On the other hand, if the Mohs hardness of this abrasive is within the range and the particle size is microscopic, less than 0.1 μm, the effect of removing water scale stains will be almost nil, as in the case of the above-mentioned soft hardness. It should be noted that abrasives whose hardness and particle size both exceed the upper limit cannot be used because they will cause significant deterioration of the painted surface, and those whose hardness and particle size are both below the lower limit have no effect in removing water scale stains. Needless to say, if the hardness exceeds the upper limit and the particle size is less than the lower limit, the high hardness will cause countless small line scratches on the painted surface, resulting in decreased gloss and blurring. On the other hand, if the hardness is less than the lower limit and the particle size exceeds the upper limit, the softness of the hardness will have a large influence and the water stain removal effect will be almost nil. Examples of abrasives that satisfy the above two specific conditions, that is, abrasives that can be used in the present invention, include diatomaceous earth, calcium carbonate, and kaolin, which can be used very preferably. The content of the abrasive in the composition of the present invention is preferably in the range of 1 to 30% based on the total composition, and 30%
Even if the above-mentioned abrasive is contained, the stain removal effect remains the same, so it is economically wasteful.On the other hand, if the content is less than 1%, the water scale stain removal effect is greatly reduced. Next, as the thickener in the composition of the present invention, organic polymer thickeners such as carboxymethylcellulose, carboxyethylcellulose, methylcellulose, polyvinyl alcohol, polyvinylpyrrolidone, hydroxyethylcellulose, carboxymethylstarch, carboxymethylethylbenzine starch, polyacrylamide, etc. and inorganic thickeners such as colloidal silica. To explain the effects of these thickeners, first, they improve the stability of the detergent. In other words, it exhibits the effect of stably maintaining the dispersion state of the abrasive described above. This thickener also has the function of improving the adhesion of the cleaning agent to the painted surface and making the cleaning agent adhere uniformly to the painted surface. Furthermore, this thickener also plays the role of a cleaning aid, exerting a so-called builder effect and preventing stains from re-adhering. The thickener also has the effect of improving the frictional effect of the abrasive and increasing the polishing power. The amount of this thickener added is determined by the viscosity of the cleaning agent at room temperature.
They may be blended to have a viscosity of 50 to 1500 cps, preferably 200 to 500 cps. If the viscosity of this cleaning agent is less than 50 cps, the effects of the various thickening described above cannot be obtained, while if the viscosity is higher than 1500 cps, it becomes difficult to uniformly apply the cleaning agent. Next, when a surfactant is blended in the present invention, any of the usual cationic, anionic, nonionic, and amphoteric surfactants can be used as the surfactant. The combination of this surfactant improves the stability of the cleaning agent, and also improves its cleaning performance, and makes it easier for abrasives, etc. remaining on the painted surface after brushing to be washed away from the entire vehicle by washing with water. It also has the effect of The blending ratio of this surfactant is preferably about 1 to 10% of the total composition. The composition of the present invention has the above-mentioned composition, and it goes without saying that other additives may be mixed in as required. To explain how to use the composition of the present invention, first, the cleaning composition is spray applied to the entire vehicle, then brushed with a gate-type car wash, and then brushed while washing with water. Vehicle cleaning can be accomplished in a timely manner. This cleaning can completely remove water scale stains without damaging the painted surface, and further waxing using a gate type car wash after this will provide sufficient water repellency and gloss. Furthermore, since the composition of the present invention does not contain any solvents that can be a source of water pollution, it can be disposed of as is without wastewater treatment, and is not flammable, making it very desirable from the standpoint of pollution prevention and safety. Example: 10 passenger cars of the same model (Nissan Sunny) with white painted surfaces were subjected to regular waxing and left outdoors in the same location for one month, and the test cars were prepared with considerable water stains. . These 10 test cars (No. 1 to No. 10) were washed with water and brushed using a gate-type car wash machine. It was cleaned using a process called washing with water and brushing. As the cleaning agent used in this step (2),
The following various formulations were used. (Composition is in parts by weight) Cleaning agent A Diatomaceous earth A (Mohs hardness 4.5-5.5, particle size 3-5μ)
5 Neugen TW-60 (Daiichi Kogyo Seiyaku's nonionic surfactant) 2 Thickener (carboxyethyl cellulose) 0.5 Water 92.5 Cleaning agent B Diatomaceous earth B (Mohs hardness 5, particle size 1-2μ) 5 Neugen ET-159 (Daiichi Kogyo Seiyaku nonionic surfactant) 2 Thickener (polyvinyl alcohol) 1 Water 92 Cleaning agent C Calcium carbonate (Mohs hardness 3-4, particle size 1μ)
15 Oleic acid monoethanolamine salt 2 Thickener (carboxymethylcellulose) 0.5 Water 82.5 Cleaning agent D Kaolin (Mohs hardness 2, particle size 2μ) 25 Oleic acid monoethanolamine salt 2 Thickener (polyvinylpyrrolidone) 1 Water 72 Washing Agent E Silica sand (Mohs hardness 7, particle size 10-15μ) 5 Neugen TW-60 2 Thickener (carboxymethyl cellulose) 0.5 Water 92.5 Cleaning agent F Talc (Mohs hardness 1, particle size 1-3μ) 25 Neugen ET-159 2 Thickener (polyvinyl alcohol) 1 Water 73 Cleaning agent G Diatomite B 5 Neugen ET-159 2 Water 93 Cleaning agent H Kaolin 25 Monoethanolamine oleate 2 Thickener (carboxymethyl cellulose) 3 Water 70 Cleaning agent I Commercially available Product (Nonionic surfactant type) Cleaning agent J Commercial product (Anionic surfactant type) Of the above cleaning agents, four of the cleaning agents A, B, C, and D are the compositions of the present invention. In E, the silica sand is outside the range in both Mohs hardness and particle size, and cleaning agent F
The Mohs hardness of talc is outside the range, and E and F are comparative examples regarding abrasives. Further, cleaning agent G is a comparative example in which the viscosity is low by removing the thickener from cleaning agent B, and cleaning agent H is a comparative example in which the viscosity is too high due to the large amount of thickening agent. The results of these experiments are summarized in the table below.

【table】

[Table] From this table, No. 1 to No. 1 using the composition of the present invention.
It was confirmed that all samples No. 4 exhibited excellent cleaning effects in which the water scale stains were completely removed, and the gloss did not deteriorate and there was no adverse effect on the painted surface. When No. 5 silica sand is used, water scale stains are removed sufficiently, but it seriously damages the painted surface and reduces its gloss. In addition, in the case of No. 6 talc, it does not affect the painted surface, but the water scale stains have not been removed. Furthermore, when the viscosity is too low or too high, as in No. 7 and No. 8, the removal of water scale stains is somewhat difficult, and in particular, the problem of uneven removal of stains due to uneven application is a major drawback. . Additionally, both commercially available car wash detergents did not remove water stains. C. Effects of the Invention As explained above, the composition of the present invention is a vehicle cleaning agent for gate-type car wash machines, and contains a thickener and an abrasive that satisfies specific conditions. This composition can completely remove water scale stains that cannot be removed with conventional car wash detergents, and this composition can be used to wash and wash in gate-type car wash machines.
Even if waxing is repeated, there is no accumulation of water scale, and the composition of the present invention has no adverse effect on the vehicle or its painted surface. The composition of the present invention has the effect of maintaining the beauty of the car forever without damaging it, and since the composition of the present invention does not contain organic solvents that are flammable or pollute water quality, it can be thrown away as is without wastewater treatment, making it safe.・It has extremely significant effects on pollution prevention and workability.

Claims (1)

[Claims] 1. A cleaning agent for cleaning vehicles used in brushing-type gate-type car wash machines, which contains a thickener and a particle size of 0.1 to 5μ in water or an aqueous surfactant solution.
A water stain cleaning composition for a gate-type car wash machine, characterized in that it contains an abrasive having a Mohs hardness of 2 to 6.