JPS59157195A - Remover for vehicle glass oil film - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oil film remover that can easily remove oil films adhering to the windshield, windshield, rear glass, etc. of vehicles, particularly automobiles.

The glass surfaces of automobiles are constantly contaminated by oils, fats, waxes, etc. used when cleaning the car body, dust in the atmosphere, oil smoke, and automobile exhaust gas. In particular, silicone oil contained in oils and waxes is partially washed away during rain or car washing, and forms a silicone film on the glass surface of a car, forming a book-repellent contaminant. It forms an oil film and adheres firmly. For this reason, the visibility of the glass surface is significantly reduced, and the light rays from oncoming vehicle headlights, traffic lights, etc. are diffusely reflected, especially during rainy days and at night, obstructing the driver's view and greatly impairing the driver's safe driving. Conventionally, colloidal silica, nonionic surfactants, anionic surfactants, polyvinyl alcohol, -
Oil film removers containing water or the like as a constituent have been used, but such oil film removers have the drawback of not being able to remove strong oil films due to the low polishing power of colloidal abrasions.

In recent years, in order to improve this drawback and provide sufficient polishing power, polishing materials such as cerium oxide, alumina, zirconia, and various other clay minerals are used as the main ingredients, and surfactants, alcohols, rust preventives, water, etc. Oil slick removers containing this as a constituent have come into use.

However, oil film removers containing such polishing materials have the advantage of polishing the oil film on the glass surface and almost completely removing the strong water-repellent oil film, but on the other hand, they can cause scratches on the long side of the glass. There is a drawback □ that occurs.

In order to improve this drawback, an oil film remover containing ultrafine cerium oxide as a main component has been developed. However, the more difficult and expensive it is to make cerium oxide into ultra-fine particles, the more cerium and silica adheres to the glass, resulting in poor wiping and cleaning properties after use and poor wetting durability.

The present invention provides an oil film remover that has improved the above-mentioned conventional drawbacks, and can easily remove the oil film firmly attached to the glass surface without damaging the glass surface, and can be wiped off after use. The object of the present invention is to provide an oil film remover for vehicle glass that has good durability and long-lasting wetness and does not adversely affect the heavy coating film of automobiles.

In order to achieve the above object, the present inventors have been conducting various research on secondary aggregates consisting of tricalcium aluminate hexahydrate (3cao11A203a6H2o, hereinafter simply referred to as c, AHe) and corundum. As a result of repeated experiments and research, we have succeeded in developing the oil film remover for vehicle glass of the present invention.

That is, the present invention uses 1d to 140% by weight of secondary aggregates consisting of Q3AH8 and corundum, 1 to 10% by weight of nonionic surfactant, and 5 to 5.0% by weight of thickener □O1□.
This is an oil film remover for vehicle glass that consists of , and the remainder ice. □C3 related to wood inventions
The secondary aggregate consisting of A'H8 and corundum is Cm
AHEI and corundum are effective minerals, but these substances are not simply mixed;
Each of the secondary particles of about 100 pm is aggregated into agglomerates in the form of granules, forming secondary aggregates as if corundum were wrapped in C3AHe.

This secondary i-aggregate has a remarkable polishing effect that destroys and removes the oil film on the glass surface without causing any scratches on the glass, reproducing an extremely smooth and scratch-free mirror surface in a short time. It also has the excellent properties of being easy to wipe off from the glass surface and keeping the glass wet for an extremely long time.

The excellent effect produced by this secondary aggregate is thought to be due to the polishing action of corundum, which is in a state where C and AHe are wrapped around the corundum and slightly protrudes from the rolling secondary aggregate. It will be done. When the corundum pieces slightly protruding from the secondary aggregates wear out and the polishing force decreases, the secondary aggregates collapse from the surface and new corundum is exposed.
The polishing action is continued until the secondary aggregates are completely broken down.

This excellent polishing performance is particularly achieved when the particle size of the secondary particles of C3AHe and corundum is 1 gm or less, and the particle size of the secondary aggregates made of these particles is 1101 L or less. Provides excellent polishing effect.

Furthermore, even if this secondary aggregate adheres to the car body paint film during use, it is chemically stable and will not discolor the paint film or damage the car body at all.

If the amount of the secondary aggregates composed of C, AHe and corundum blended into the oil film remover of the present invention is less than 10% by weight, the oil film removal performance will be insufficient, and even if it exceeds 40% by weight, the polishing effect will be improved. 10 because the force does not increase and the soda film removal performance does not change.
~40% by weight. 'The nonionic interfacial interpolating agent penetrates between the oil film and the glass surface to facilitate the removal of the oil film in a short time when secondary aggregates consisting of C2, AHe and corundum polish the glass surface. It is something that does. It also has the effect of making the glass surface hydrophilic, preventing water droplets from forming on the glass surface, preventing stains from re-adhering, and improving the durability of wetting.

Conventionally known nonionic surfactants may be used, but in particular, a mixture of sorbitan ester ether type (hereinafter referred to as SEE) and oxyethylene oxypropylene block polymer type (hereinafter referred to as 0EOP) may be used. When used, it provides even better properties in all aspects, including oil film removal, wiping performance, long-lasting wetness, and prevention of discoloration of car body paint.

The blending amount of the nonionic surfactant is 1 to 10% by weight. If it is less than 1% by weight, the penetrating power of the oil film remover to penetrate between the oil film and the glass surface is too small, and the oil film removal effect will not appear.On the other hand, even if it is blended in excess of 10% by weight, no improvement in the oil film removal effect is observed. do not have.

Furthermore, when using a mixture of SEE and 0EOP, if one of the components is used in an amount of at least 0.5% by weight, the oil film removability, wiping performance, and wetting durability are extremely good. For 0EOP, if a block polymer is used, the effect of cleaning the glass surface is added, and even better properties can be obtained, and the average molecular weight is 20.
00 or more is more effective.

The oil film remover of the present invention contains a thickener to uniformly disperse the two-time aggregates composed of C3AHe and corundum, which are compounded components, and to provide appropriate fluidity when applied to a glass surface. Blend. Any thickener may be used as long as it does not cause discoloration of the car body coating, and preferred examples include colloidal silica, methyl cellulose, and carboxymethyl cellulose.

The amount of the thickener required is 0.5 to 5.0% by weight.

If it is less than 0.5% by weight, the dispersion stability of the oil film remover is poor and is not preferred. Furthermore, if the amount exceeds 5.0% by weight, the viscosity will become too high, resulting in poor fluidity and extremely poor workability.

The vehicle glass oil film remover of the present invention may contain an appropriate amount of polyhydric alcohol in order to impart an antifreeze effect. Preferred polyhydric alcohols include glycerin, ethylene glycol, propylene glycol, and the like.
.

EXAMPLES Next, Examples of the present invention will be shown and the effects of the oil film remover of the present invention will be explained in detail, but the Examples are not intended to limit the present invention in any way.

Example As an example of the oil film remover of the present invention, an aqueous oil film remover was prepared by stirring and mixing the following components.

Example I Secondary aggregate consisting of C3AH6 and corundum
...15.0% by weight Nonionic surfactant SEE o, 2.0% by weight 0EOP
・2.0% by weight methyl cellulose
... 3.0% water by weight
...78.0% by weight Example 2 Secondary aggregate consisting of C, AH6 and corundum
...20.0% by weight Non-ionic surfactant SEE ... 1.0% by weight 0EOP ・1.0% by weight Methyl, cellulose ... 2. O weight fi 1% □ Glycerin ... 5.0 weight % water
□...71.0% by weight As a comparative example, the following was tested for comparison.

Comparative Example 112 Commercial product A (clay mineral-based aqueous liquid oil film remover) Comparative Example 22 Commercial product B (cerium oxide-based aqueous oil film remover)
Comparative Example 3: Commercial product C (alumina powder-based aqueous liquid oil film remover) Comparative Example 4: Commercial product D (zirconia-based aqueous liquid oil film remover) Above, Examples 1 to 2, Comparative Examples 1 to 4 were applied to a glass surface and their performance was tested.

The test items are oil film removability, wiping performance, durability of wetting,
This is the effect on the paint film. The test method and test results will be explained below.

(1) Oil film removal ability Spread diluted silicone liquid (containing 7% silicone oil) on a 100mm x 100mm x 1oo plate glass using a clean cloth, leave it at room temperature for 24 hours, and then bake it in a dryer at 150°C for 5 hours to coat the plate glass surface. The specimen on which a strong oil film was formed was used as a test piece.

After dropping 3 g of the various oil film removers listed in "-" on one side of each glass, a soft polyurethane foam sponge was moved back and forth 10 times with an even load, and then dried.
Next, the residue on the glass surface was removed with a clean rag, the contact angle was measured, and the oil film removability was determined from the contact angle.

A contact angle of less than 5 degrees was evaluated as ○, a contact angle of 0.5 degrees or more and less than 20 degrees was evaluated as Δ, a contact angle of 20 degrees or more and less than 45 degrees was evaluated as Δ, and a contact angle of 45 degrees or more was evaluated as ×.

(2) Wiping ability Drop a certain amount of the various oil film removers mentioned above onto a car windshield, and after drying, wipe it with a certain force using a clean rag. I judged it.

If it was wiped off within 3 times, it was rated as Δ, if it was wiped off in 4 to 6 times, it was rated as Δ, and if it took 7 or more times, it was rated as ×.

(3) Persistence of wetting The glass plates after the oil film removability test were subjected to 10 cycles of drying at 50'CX for 30 minutes and then spraying water for 15 minutes, and then the durability of wetting on the glass surfaces was compared. In other words, after immersing a glass plate in water, taking it out and leaving it horizontally for 1 minute, the percentage of water-wetted area is 90% or more as 0160%, less than 90% as Δ, and less than 60% as ×. did.

(4) Effect on paint film The effect when oil film remover adheres to the paint film of a car body was investigated by using a paint film test piece and dropping a certain amount of various oil film removers at 50°C.
After dry blasting for 60 minutes and wiping with a clean cloth, the surface condition was visually observed and determined.

The case where there was no change in the coating film was rated as ○, and the case where the coating film was discolored or scratched was rated as ×.

The test results are shown in Table 1.

According to Table 1, the oil removers of Examples 1 and 2 of the present invention exhibit excellent performance in oil film removal properties, wiping properties, wetting persistence □, and effects on paint films.

applicant Mitsubishi Mining Cement Co., Ltd. Agent: Patent attorney: Yoshio Kosugi

Claims (1)

[Claims] 1 10 to 40% by weight of secondary aggregates consisting of tricalcium aluminate hexa/\idrate and corundum, 1 to 10% by weight of nonionic surfactant, 0 thickener
．． An oil film remover for vehicle glass, comprising 5 to 5.0% by weight and the balance water. 2. The particle size of tri-lucicum aluminate hexa/\idrate and corundum is each 1 pm or less, and the particle size of a secondary aggregate made of these particles is lopm or less, according to claim 1 Oil film remover for vehicle glass. 3. The oil film remover for vehicle glass according to claim 1, wherein the nonionic surfactant is a mixture of a sorbitan ester ether type surfactant and an oxyethylene oxypropylene block poly-1-type surfactant.