JPH08206963A - Plastic abrasive for painting surface and metal surface - Google Patents

Abstract

PURPOSE: To provide a safe plastic abrasive for a painting surface and a metal surface by which a foreign matter sticking to the surface can be easily removed without damaging the painting surface and the metal surface. CONSTITUTION: A plastic abrasive for a painting surface and a metal surface 5 is provided in such a way that a substance of which Moh's hardness is not less than 3 and a particle diameter is 0.1μm to 3μm is dispersed by 3 to 50wt.% as polishing particles 4 and talcs 3 by the content of 70 to 30wt.% as a filler in a liquid polymer and oleic acid is also added as a lubricant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic abrasive for polishing and removing foreign matter adhering to a coated surface and a metal surface, and polishing and smoothing the very surface layer of each surface.

[0002]

2. Description of the Related Art Various foreign substances adhere to the painted surface and metal surface of equipment used mainly outdoors such as vehicles depending on the surrounding environment. Examples of the deposit include sand floating in the air, iron, coating mist, and the like. Also,
Tar, pitch, carcasses of insects, etc. that have separated from the paved road surface may adhere. Then, the coated surface and the metal surface to which such foreign matters are attached are rough.

As a method of removing these deposits,
For example, there is known a method of polishing the surface using a compound or sandpaper in which abrasive particles are dispersed in a liquid. Also disclosed is an abrasive in which abrasive particles are dispersed in a rubber-like elastic substance or a plastic resin clay. For example, Japanese Examined Patent Publication (Kokoku) No. 5-39677 discloses an abrasive containing an oily putty and abrasive particles such as glass and ceramics kneaded therein. Further, Japanese Patent Publication No. 5-83120 discloses an abrasive in which synthetic rubber, asbestos, talc, an antioxidant, a coloring agent, calcium carbonate and clay are mixed in a predetermined ratio. Further, Japanese Patent Publication No. 4-11335 discloses an abrasive in which one or more kinds of silica sand having a particle size of 3 to 50 μm, calcium carbonate, alumina, and green carbon random are mixed as abrasive particles in a plastic flexible material. Has been done.

[0004]

However, in the method of using the compound or sandpaper described above, the foreign substances adhering to the coated surface and the metal surface are removed by polishing, and at the same time, the coated surface and the metal surface themselves are deeply polished. . For this reason, there are problems that the coated surface becomes thin and the durability is reduced, and the surface roughness of the coated surface and the metal surface is reduced.

In the abrasives disclosed in each of the above publications, a hard substance having a Mohs hardness of 3 or more is used as abrasive particles. When the concentration and particle size of the hard substance are large, there is a problem that the coated surface and the metal surface are easily scratched. In particular,
On dark-colored surfaces, scratches like this are easy to notice,
The appearance of the painted surface will be significantly impaired. In addition, it takes a long time to completely cure a surface coated with a low-solvent paint which has been used in recent years. When an abrasive having a large concentration of the hard substance and a large particle size was used for such a coated surface that did not completely cure, scratches were more likely to occur.

On the other hand, in the method of removing the adhered substance of Japanese Patent Publication No. 5-39677, it is essential to apply a detergent to the coated surface in advance and polish it with an abrasive. Therefore, it is troublesome that the coated surface needs to be cleaned after polishing. Further, there is a problem that it is not applicable to the correction of the roughness of the coated surface accompanied by the concave portion, only for removing the adhered substance.

Furthermore, the abrasive described in Japanese Patent Publication No. 5-83120 has a problem that it contains asbestos, which has been regarded as a problem of safety in recent years, in a high concentration as an essential component.

The present invention has been made by paying attention to the problems existing in such conventional techniques. It is an object of the present invention to provide a plastic abrasive for a painted surface and a metal surface, which can easily remove foreign substances attached to the surface without damaging the painted surface and the metal surface.

[0009]

To achieve the above object, in the present invention, 70 to 30 wt% of talc is used as a filler.
%, And further contains 3 to 50 wt% of abrasive particles having a particle diameter of 0.1 μm or more and less than 3.0 μm.

The coated surface and metal surface polishing agent of the present invention are
It is composed of abrasive particles, a filler, a liquid polymer and a lubricant. Abrasive particles are added to polish and remove foreign matter adhering to the coated surface and the metal surface, and to polish a very small surface layer on the surface. Therefore, a hard substance having a Mohs hardness of 3 or more is suitable. Examples of substances having a Mohs hardness of 3 or more include alumina, silica, calcium carbonate, zirconia, silicon carbide, boron carbide, silicon nitride,
Examples include glass, soda glass, apatite, feldspar, diatomaceous earth, and the like. The abrasive particles used in the present invention may be selected from the above hard substances, or may be used by mixing a plurality of types.

Further, as described above, the particle size of the hard substance,
When the concentration is high, there is a problem that scratches are left on the surface to be polished. Therefore, in the present invention, the particle size and concentration of the abrasive particles are defined within a range that does not impair the polishing performance of the abrasive and does not leave scratches on the surface to be polished.

The specific particle size range of abrasive particles is as follows:
It should be 0.1 μm or more and less than 3 μm, and more preferably 1.0 μm or more and 2.5 μm or less. If the particle size of the polishing particles is larger than this, scratches may remain on the surface to be polished after polishing. When the particle size is smaller than this, not only is it economically disadvantageous, but the polishing effect is not sufficient.

Next, it is necessary that the specific concentration range of the abrasive particles is 3 to 50 wt%, and more preferably 10 to 40 wt%. If the content of the abrasive particles is higher than this range, the painted surface and the metal surface will be scratched, and the plastic abrasive will become hard and the workability will deteriorate. If the content of abrasive particles is less than this, the polishing effect is not sufficient.

The filler controls the tackiness derived from the liquid polymer. Further, it is preferable that the filler has a small effect on the coated surface and the metal surface. Therefore, a soft substance having a Mohs hardness of less than 3 is suitable as a filler because it is soft and does not damage the coated surface and the metal surface. Examples of the soft substance having a Mohs hardness of less than 3 include talc, vermiculite, gypsum, kaolin, mica and the like. In the present invention, talc, which is slippery and has the smallest Mohs hardness, is selected as the filler from the viewpoint of preventing the occurrence of scratches due to the polishing work. Also, in the case of talc, if the particle size is large, the coated surface and the metal surface may be scratched, and therefore, the talc preferably has a fineness (on a 350 mesh) of 1 wt% or less.

The content of talc is 70 to 30 wt.
% Is preferable, and 50 to 40 wt% is more preferable. If the content of talc is less than this, the plastic abrasive becomes soft and the workability is significantly reduced. If the content of talc is higher than this, the plastic abrasive becomes hard and the polishing effect is reduced.

The liquid polymer imparts plasticity to the abrasive. In addition, it also has a function of adhesively removing the adhered foreign matter that is easily peeled off, the adhered foreign matter worn by the abrasive particles, and the worn abrasive particles. Examples of such liquid polymers include liquid polybutadiene, liquid polybutene, liquid polyisobutylene, liquid polyisoprene, liquid polychloroprene, liquid butyl rubber, liquid styrene-
Examples thereof include butadiene copolymer rubber, liquid acrylonitrile-butadiene copolymer rubber, liquid polysulfide, and liquid natural rubber. Further, for example, metal soap, higher fatty acid, higher fatty acid ester, higher alcohol, higher fatty acid amide and the like can be added to the liquid polymer as a lubricant.

[0017]

The filler talc of the plastic abrasive of the present invention is a substance having a leaf-like flat crystal structure and is also used as a solid lubricant. As shown in FIG. 1, the plastic abrasive 1 of the present invention comprises talc particles 3 in a matrix of liquid polymer 2.
And abrasive particles 4 are dispersed. Then, in the outermost layer of the plastic abrasive 1, abrasive particles 4 having a particle diameter of 0.1 μm or more and less than 3 μm are arranged on the flat surface of the talc particles 3.

The polishing operation is performed by pressing the plastic abrasive 1 against the coated surface and the metal surface 5 and moving it in the direction of the arrow in the figure. The foreign matter 6 adhering to the coated surface and the metal surface 5 bites into the outermost surface layer of the plastic abrasive 1 and is pulverized by the abrasive particles 4 to be adhesively removed by the liquid polymer 2. Furthermore, only a few layers of the painted surface and the metal surface 5 are polished by the few abrasive particles 4 protruding on the surface of the plastic abrasive 1. Therefore, the surface roughness 7 that accompanies the recess is also corrected to a smooth surface 8 by polishing the edge of the recess. At this time, the abrasive particles 4 protruding on the surface of the plastic abrasive 1 are worn away by pulverizing the foreign matter 6 adhering to the coated surface and the metal surface 5 and polishing a very small layer on the coated surface and the metal surface 5. And
The abraded abrasive particles 4 are also adhered to the liquid polymer 2 and removed.

Here, the abrasive particles 4 dispersed in the plastic abrasive 1 of the present invention have a particle diameter as small as 0.1 μm or more and less than 3.0, and the content is limited to 3 to 50 wt%. It also contains 70 to 30 wt% of talc 3, which has the smallest Mohs hardness and also functions as a solid lubricant. Therefore, after the abrasive particles 4 are abraded, the talc 3 having low hardness and slippage advances to the surface of the plastic abrasive 1,
It does not deeply polish the painted surface and the metal surface 1 or leave scratches on the surface to be polished.

Further, in order to improve workability, the coated surface and the metal surface 5 may be pre-wetted with water, or the plastic abrasive 1 may be supported by a sponge containing water for the work.

[0021]

[Examples] The plastic abrasives of the present invention will be described more specifically below with reference to Examples. Example 1 Talc A as a filler (fineness: on 350 mesh)
0.5% or less, bulk specific volume: 0.9 to 1.3 ml / g) 1
4 wt%, talc B (powder: 350 on mesh 0.
05% or less, bulk specific volume: 0.9 to 1.1 ml / g) 3
0.0 wt%, alumina as abrasive particles Product name W
A # 6000 (manufactured by Fujimi Incorporated,
A kneader, which is a kneader, was charged with 7 wt% of a particle diameter of 2 μm and 29.5 wt% of calcium carbonate (trade name: Hydrocalp (manufactured by PLUSS-STAUFER, particle diameter of 1.5 μm)).

Next, polyisobutylene as a liquid polymer, trade name Tetrax 3-T (Nippon Petrochemical Co., Ltd.)
Made) 12 wt%, polyisobutene trade name HV-190
4 wt% of 0 (manufactured by Nippon Petrochemical Co., Ltd.) was added and kneaded to perform plasticization. Furthermore, 3.5 wt% of Oleic acid (trade name) Lunac OP (manufactured by Kao Corporation) as a lubricant was added and kneaded to obtain a desired plastic abrasive for coated surfaces and metal surfaces.

The plastic abrasive for coated surfaces and metal surfaces of this example was used outdoors for a long period of time and was used for polishing the coated surfaces of white-painted cars and black-painted cars with foreign matter attached. The polishing operation was performed by pressing the plastic abrasive against the surface to be polished and reciprocating it several times.

The coated and metal surface plastic abrasives of this example had an appropriate hardness and exhibited good workability and foreign matter removing effect. Also, regardless of whether it is a white-painted car or a black-painted car, no scratches are observed on the painted surface after polishing,
It was in a smooth state.

Although a kneader is used as the kneading machine in this embodiment, the kneading machine may be plasticized by using, for example, a twin roll. Example 2 A plastic abrasive for coated surfaces and metal surfaces of Example 2 was obtained in the same manner as in Example 1 with the composition shown in Table 1. As shown in Table 2, this plastic abrasive also showed good workability and foreign substance removing effect as in the case of Example 1. No scratches were observed on the painted surface after polishing, regardless of whether it was a white-painted car or a black-painted car.

Comparative Examples 1 to 6 Next, the plastic abrasives for coated surfaces and metal surfaces of Comparative Examples 1 to 6 were prepared by the same method as in Example 1 with the composition shown in Table 1. The examination results are shown in Table 2.

In Comparative Example 1 in which the content of talc was 25% by weight, the plastic abrasive was soft and easily lost its shape during reciprocating motion, resulting in very poor workability.

In Comparative Example 2 in which the content of talc was 70 wt%, the plastic abrasive became hard. For this reason, the foreign matter adhering to the coated surface did not fully dig into the surface of the plastic abrasive, and the foreign matter removing effect was poor.

In Comparative Example 3 in which the total content of the abrasive particles was 2.5 wt%, the foreign matter removing effect was not recognized. The content of abrasive particles is 60 wt% and the content of talc is 13.
In Comparative Example 4 in which the content was 5 wt%, the plastic abrasive became hard and the sliding on the coated surface was poor, resulting in poor workability.

Total content of abrasive particles is 67.2 wt%
Then, in Comparative Example 5 in which 24 wt% of the calcium carbonate had a particle diameter of 30 μm, scratches were clearly observed on the painted surface of the black-painted car. Also, some scratches were observed during the polishing work of the white-painted car.

Total content of abrasive particles is 65.6 wt%
In Comparative Example 6 in which 43.7 wt% of the calcium carbonate had a particle size of 5 μm, a scratch was clearly recognized on the painted surface of the black-painted car.

[0032]

[Table 1]

[0033]

[Table 2]

Next, the technical idea extracted from the above embodiment will be described. (1) In a plastic abrasive for coated surfaces and metal surfaces in which abrasive particles and a filler are dispersed in a liquid polymer, the abrasive particles having a Mohs hardness of 3 or more and a particle diameter of 0.
A plastic abrasive for coated surfaces and metal surfaces, containing 3 to 50 wt% of particles of 1 μm or more and less than 3.0 μm.

With this structure, no scratches are left on the painted surface and the metal surface after polishing. (2) As the abrasive particles, 10 to 10 particles having a Mohs hardness of 3 or more and a particle diameter of 1.0 μm or more and 2.5 μm or less are used.
A plastic abrasive for a painted surface and a metal surface containing 40 wt%.

According to this structure, it is possible to obtain a polishing agent that is less likely to scratch the coated surface and the metal surface without impairing the polishing performance. (3) In the item (1) or (2), 70 to 30 wt% of particles having a Mohs hardness of less than 3 are used as the filler.
A blended plastic abrasive for painted surfaces and metal surfaces.

According to this structure, the tackiness of the plastic abrasive can be adjusted without damaging the coated surface and the metal surface. Further, it is possible to provide a plastic abrasive having excellent workability.

(4) In the above item (1) or (2), 50 particles having a Mohs hardness of less than 3 are used as the filler.
A plastic abrasive for coated surfaces and metal surfaces, which is blended up to 40 wt%.

According to this structure, the effect of preventing the scratches caused by the polishing operation of the plastic abrasive can be further improved, and the workability can be improved.

[0040]

EFFECTS OF THE INVENTION The plastic abrasive for coated surfaces and metal surfaces of the present invention can easily remove foreign matters and the like only by reciprocating on the coated surfaces and metal surfaces on which foreign matters adhere. Moreover, no scratch is left on the surface. At the same time, very few layers on the painted and metal surfaces can be polished to smooth out surface roughness, such as with recesses.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the action of a plastic abrasive of the present invention.

[Explanation of symbols]

1 ... Plastic abrasive, 3 ... Talc, 4 ... Abrasive particles, 5 ... Painted surface and metal surface.

Claims (1)

[Claims] 1. 70 to 30 wt% of talc as a filler
A plastic abrasive for coated surfaces and metal surfaces, comprising 3 to 50 wt% of abrasive particles having a particle diameter of 0.1 μm or more and less than 3.0 μm.