JP2000290692A - Detergent composition for removing oil film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent composition capable of readily removing an oil film being a persistent stain which has been regarded as a defect, especially on a window glass of automobile, etc., by making the composition include a composition as a main component using a rare earth oxide and cerium hydroxide. SOLUTION: This composition comprises a composition as a main component using (A) a rear earth oxide having preferably 2-5 μm particle diameter (preferably cerium oxide) and (B) cerium oxide having preferably 0.01-1 μm particle diameter. The ratio of the components A and B used is 25-35 pts.wt. of the component B based on 100 pts.wt. of the component A. The total amount of cerium oxide as the component A in the detergent composition and the component B is preferably 4.0-8.0 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition for removing an oil film, which can effectively remove an oil film on a glass surface, particularly on a window glass of an automobile or the like, and can obtain good visibility.

[0002]

2. Description of the Related Art Dirt adhering to windshields of automobiles is used as a repellent for oils due to pitch on the road, tars and exhaust gas in the air, waxes for automobiles, silicone oil, and more recently as wind glass repellents. There are various types such as a residual coating of a widely used glass coating agent. Of these, especially the coating agent for glass used for window glass, the non-uniform residual film of the coating agent for fluorine-based glass that has recently been released is strongly bonded and adhered to the glass. Because of this, it is not easily removed, which causes glare and poor moderation when driving on a rainy day.

[0003] For cleaning the above-mentioned window glass, a detergent comprising a surfactant, a water-soluble solvent, amines and a combination thereof is generally used. However, in the case of strong oily stains, oily stains caused by non-uniform residual silicon coatings, such as glass coatings, especially with window glass water repellents, chemically bond to the glass surface. Therefore, it is difficult to remove with a normal cleaning agent, and for this purpose, for example, a cleaning agent containing an abrasive mainly composed of silicon dioxide, cerium oxide, or the like is used. In the case where a cleaning agent containing such an abrasive is used, the oil film removal property is insufficient for the effort, and at present, it is not enough to ensure a sufficient field of view during traveling.

[0004]

SUMMARY OF THE INVENTION The present invention provides a cleaning composition for removing an oil film, which can easily remove an oil film which is a stubborn dirt which has been regarded as a defect, particularly in a window glass of an automobile or the like. It is to propose.

[0005]

Means for Solving the Problems The present inventors have conducted various studies on the above-mentioned problems and completed the present invention. That is, the present invention is a cleaning composition for removing an oil film, comprising a rare earth oxide and cerium hydroxide as main components.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The rare earth compounds used in the present invention include cerium oxide, lanthanum oxide, neodymium oxide, gadolinium oxide, etc. Among these rare earth oxides, oil film removability and easy availability are available. Therefore, cerium oxide, lanthanum oxide, neodymium oxide, and the like are preferable, and cerium oxide is particularly preferable. The particle size of these oxides may be from 0.1 μm to 50 μm, but from the viewpoint of oil film removability and economy, it is preferably from 0.5 μm to 1 μm.
Those having a thickness of 0 μm are preferred, and those having a thickness of 2 μm to 5 μm are particularly preferred. Examples of commercially available products include Celox manufactured by Showa Denko KK and Luminox manufactured by Seimi Chemical Co., Ltd.

The particle size of cerium hydroxide is as follows:
Although those having a thickness of 0.005 μm to 20 μm can be used, those having a thickness of 0.01 μm to 5 μm are preferable, and those having a thickness of 0.01 μm to 1 μm are more preferable from the viewpoint of oil film removability and economy. Commercially available products include those manufactured by Daiichi Nozomi Element Co., Ltd. and Shin Nippon Metal Co., Ltd.

Cerium hydroxide can be used in an amount of 5 to 65 parts by weight with respect to 100 parts by weight of the rare earth oxide. In the range of 15 to 45 parts by weight of cerium hydroxide, 25 to 35 parts by weight of hydroxylation, 5 parts by weight or less of cerium hydroxide and 65 parts by weight or more, oil film removal even when cerium hydroxide is added. No improvement in the effect is seen, which is not preferable. In addition, a thickener, a fragrance, a water-soluble solvent (for freezing stability, dispersion of fragrance) and the like may be added to the composition as needed to prevent sedimentation of the rare earth oxide and cerium hydroxide fine powder. Can be done.

Examples of the thickener include sodium carboxymethylcellulose (CMC), methylcellulose, ethylcellulose, xanthan gum, Carbopol, (BF Goodrich), a copolymer thickener of acrylic acid and alkyl methacrylate, bentonite, smectite, synthetic Smectite (Laponite RD) thickeners are used, and the amount used is determined in consideration of the fluidity of the detergent during use and the effect of preventing sedimentation of fine powder.
Usually, 0.1 to 2.5% is appropriate. As the water-soluble solvent, alcohols are preferable, and ethyl alcohol and isopropyl alcohol are particularly preferable in consideration of the drying property after application of the cleaning agent.

[0010] The total amount of cerium oxide and cerium hydroxide in the detergent composition is usually used in the range of 2.0 shells 40% by weight, preferably 3.0 to 25% by weight, more preferably 4.0 to 25% by weight.
8.0% by weight is particularly preferred. If the content is more than 40% by weight, no improvement in oil film removal properties is observed, the applicability is deteriorated, and powder may be scattered during wiping and adhere to a car body, causing problems such as soiling the body. is there. Also, 2
If it is less than 10% by weight, the effect of improving the oil film removal property is not so much seen. In the cleaning composition, silicon dioxide (Nipsil) may be used as required in order to improve wiping properties.
Inorganic powders such as E200) and diatomaceous earth (Seratom MW25, snow floss, Kaopolite SF) can also be used, and a suitable amount is 0.5 to 2.0% by weight.

[0011]

The present invention will be further described below with reference to examples. Further, the present invention is not limited to the following embodiments.

Example 1 10 parts by weight of cerium hydroxide (manufactured by Daiichi Rare Elements Co., Ltd.) was added to 100 parts by weight of cerium oxide (average particle size: 2 μm) manufactured by Seimi Chemical Co., Ltd. Paul 940, BF Goodri
was added to 0.2 parts by weight and 94.30 parts by weight of water to obtain 100 parts of a cleaning composition 1 for removing an oil film.

[0012]

Example 2 A cleaning composition for removing an oil film was prepared in the same manner as in Example 1 except that water was changed to 93.8 parts by weight in addition to 20 parts by weight of cerium hydroxide to 100 parts by weight of cerium oxide. The product 2 was obtained.

Example 3 In addition to a ratio of 30 parts by weight of cerium hydroxide to 100 parts by weight of cerium oxide, 1.5 parts by weight of Laponite RD (manufactured by Nippon Silica Co.) and 92.0 parts by weight of water were used. Thus, a detergent composition 3 for removing an oil film was obtained.

[0013]

Example 4 Cleaning for removing an oil film was carried out in the same manner as in Example 1 except that cerium hydroxide was added in an amount of 55 parts by weight to 100 parts by weight of cerium oxide, and water was replaced by 92.05 parts by weight. Agent 4 was obtained.

Example 5 A cleaning composition for removing an oil film was prepared in the same manner as in Example 1 except that water was used in an amount of 66.8 parts by weight in addition to 30 parts by weight of cerium hydroxide with respect to 100 parts by weight of cerium oxide. The product 5 was obtained.

[0014]

Example 6 In addition to a ratio of 30 parts by weight of cerium hydroxide to 100 parts by weight of cerium oxide, 1.5 parts by weight of Laponite RD (manufactured by Nippon Silica Co., Ltd.), 87.0 parts by weight of water, 5 parts by weight of alcohol was added to obtain a detergent composition 6 for removing an oil film.

Comparative Example 1 A detergent composition for removing an oil film was prepared in the same manner as in Example 1 except that water was 97.25 parts by weight in addition to 5 parts by weight of cerium hydroxide with respect to 100 parts by weight of cerium oxide. The product 7 was obtained.

[0015]

Comparative Example 2 A detergent composition for removing an oil film was prepared in the same manner as in Example 1 except that water was changed to 91.55 parts by weight in addition to 65 parts by weight of cerium hydroxide with respect to 100 parts by weight of cerium oxide. The product 8 was obtained.

[Comparative Example 3] Cerium oxide 20 manufactured by Seimi Chemical Co., Ltd.
In parts by weight, a thickener (Carbopol 940, BF Go
Odrich) and 0.29 parts by weight of water and 79.80 parts by weight of water to obtain 100 parts of a detergent composition 9 for removing an oil film.
I got

[0016]

Comparative Example 4 Cerium oxide was replaced with silicon dioxide (Nipsi)
l 200, manufactured by Nippon Silica Industry Co., Ltd., except that a detergent composition 10 for removing an oil film was obtained in the same manner as in Example 1.

Comparative Example 5 A cleaning composition 11 for removing an oil film was obtained in the same manner as in Example 1 except that cerium oxide was replaced with silicon carbide (Grinden Thick 40F, manufactured by Showa Denko KK).

[0017]

Comparative Example 6 Cerium hydroxide was replaced with silicon dioxide (Nips)
The same procedure as in Example 1 was carried out except that the composition was replaced with il E200 (manufactured by Nippon Silica Industry Co., Ltd.) to obtain a detergent composition 12 for removing an oil film. As described above, the effects of the cleaning compositions 1 to 8 obtained in Examples and Comparative Examples for oil film removal were determined by the following test methods.

[0018]

[Judgment method of oil film removal effect] 30cm wide, 10c long
m, a commercially available glass coating agent, Rain X (manufactured by Kinshindo Co., Ltd.) is applied to a glass plate having a thickness of 3 mm based on the usage.
A test panel is formed by forming an artificial oil film on a glass plate.
2 g of the oil film removing composition is applied to a 3.5 cm × 3.5 cm, 2.5 cm thick sponge, and a 200 g weight is placed on the sponge and reciprocated on a test panel provided with a hot water film.
The same test was performed three times, and the effect of removing the oil film was evaluated by the average number of reciprocations required for removing the oil film. Table 1 shows the results. The degree of removal of the oil film was evaluated by repelling the water of the test panel, and the determination was visually performed.

From the results in Table 1, it can be seen that the oil film removing composition according to the present invention is more excellent in oil film removing property than the conventional oil film removing detergent, and thus is necessary for removing the oil film. Time and effort can be reduced to less than half.
Based on the data obtained so far, it is shown in Table 1, and the cleaning effect by the method of the present invention is indicated from the described data,
It is obvious at a glance how the present invention has excellent characteristics. Hereinafter, the effect data of the present invention will be described with reference to Table 1.

[Table 1]

Claims (2)

[Claims] 1. A cleaning composition for removing an oil film, comprising a composition containing a rare earth oxide and cerium hydroxide as main components. 2. The cleaning composition according to claim 1, wherein the rare earth oxide is cerium oxide.