JP2002309226A - Hydrophilic agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrophilic agent capable of making a surface hydrophilized by polishing, maintaining a hydrophilic effect for a long time by adsorbing a solid particle onto the surface and in addition contaminating clothes where the hydrophilic agent is coated on the clothes. SOLUTION: The hydrophilic agent contains a particle of which the particle diameter is not less than 0.010 μm and the less than 1 μm. If necessary, a refractive index adjusting agent can be added thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for smoothing, cleaning and hydrophilizing a treated surface by polishing the treated surface with solid particles.

[0002]

2. Description of the Related Art As a conventional method for hydrophilization, a method is known in which a treated surface is polished with an abrasive when the substrate is inherently hydrophilic, so that the treated surface is restored to its original hydrophilicity. ing. On the other hand, a method is also known in which a treated surface is cleaned by polishing, and then hydrophilically applied by further applying a hydrophilic resin or the like.

[0003]

However, in the method of making the treated surface hydrophilic by polishing the treated surface using an abrasive, a removal operation such as washing with water is indispensable to remove the abrasive attached to the treated surface. there were. On the other hand, in the method of applying hydrophilicity by applying a hydrophilic resin or the like, a polishing step is required as a pretreatment, which is complicated, and the effect is short because the resin is dissolved and flows down with rainwater or the like over time. Was.

[0004] The present invention has been made by focusing on the problems existing in the prior art as described above. The purpose is to make the treated surface hydrophilic by polishing, and at the same time, to maintain the hydrophilic effect for a long time by adsorbing solid particles on the treated surface, and in addition, to make the treated surface not contaminated when adhered to clothes etc. To provide an agent.

[0005]

Means for Solving the Problems In order to achieve the above object, the hydrophilizing agent according to claim 1 comprises, as solid particles,
A hydrophilizing agent characterized by containing only particles having a particle diameter of 0.010 μm or more and less than 1 μm.

[0006] The hydrophilic agent according to the second aspect is the hydrophilic agent according to the first aspect, wherein solid particles are dispersed in a colloidal state.

[0007] The hydrophilizing agent according to claim 3 is a hydrophilizing agent according to claims 1 and 2, wherein silica is used as solid particles.

The hydrophilizing agent according to claim 4 is the hydrophilizing agent according to claims 1 and 3, wherein a refractive index adjusting agent is further added to the solid particles.

The hydrophilizing agent according to claim 5 is the hydrophilizing agent according to claims 1 and 4, which is used by impregnating it into a nonwoven fabric and a sponge.

[0010] The hydrophilizing agent according to claim 6 is used by spraying on a treated surface.
The hydrophilizing agent described in the above.

[0011] The hydrophilizing agent according to claim 7 is a hydrophilizing agent containing an abrasive, characterized in that it is transparent after drying or can be used without wiping.

Therefore, the hydrophilizing agent according to claim 1 can make the treated surface hydrophilic by polishing, and at the same time, maintain the hydrophilic effect for a long time by adsorbing solid particles on the treated surface,
In addition, it does not contaminate when attached to clothing.

Further, in the hydrophilizing agent according to the second aspect, the dispersed solid particles can be further stabilized.

[0014] According to the third aspect of the present invention, the polishing effect and the transparency can be improved.

The hydrophilic agent according to claim 4 can further improve the transparency and reduce the contamination.

The hydrophilizing agent described in claim 5 can improve the efficiency of the polishing operation.

The hydrophilizing agent according to claim 6 can improve the efficiency of the application of the hydrophilizing agent.

The hydrophilizing agent according to claim 7 can be easily used without the necessity of wiping.

[0019]

Embodiments of the present invention will be described below in detail. In the present invention, as the solid particles, particles having a particle diameter of 0.010 μm or more and less than 1 μm can be used. By using solid particles having a particle size within this specific range,
The contamination of the solid particles can be improved while maintaining high polishing properties.

The solid particles used in the present invention include talc, kaolin, mica, calcium carbonate, zinc white, feldspar, titania, silica, zirconia, silica sand, corundum, alumina, silicon carbide, silicon nitride, carbon duranium,
Diamond or the like can be used. Among these, silica, alumina, kaolin, etc., which are particularly advantageous in hydrophilicity or transparency, are preferred. These solid particles can be used alone or in combination of two or more according to the intended use.

The solid particles insoluble in the solution used in the present invention have a particle size of 0.010 μm or more and less than 1 μm. Further, those having a particle diameter of 0.010 μm or more and less than 0.2 μm are more preferable. If the particle size of solid particles is 1 micron or more,
Polishing effect is good, but contamination is high. On the other hand, when the particle size is less than 0.010 μm, the contamination is good, but the polishing effect is low.

The amount of the solid particles used in the present invention is 1
It is preferably not less than 50% by weight and less than 50% by weight. If the solid particles are less than 1% by weight, the polishing effect is reduced, and
If the content is more than wt%, the contamination becomes high.

Since the solid particles used in the present invention are used after being dispersed in a liquid, those having excellent stability during dispersion are preferred. As a method for stably dispersing solid particles having a particle diameter of 1 μm or less, a method of adding a thickener and a method of dispersing in a colloidal state are known. In the present invention, any method can be used. However, since the thickener decreases the polishing effect, it is preferable to use solid particles dispersed in a colloidal state. As a liquid in which solid particles are dispersed in a colloidal form, a colloidal dispersion of alumina, silica and silicate is commercially available, and it is convenient to use these.

In the present invention, a refractive index adjusting agent can be added to improve the contamination. The solid particles used in the present invention have a small particle size and easily penetrate into the fiber even when attached to clothes, etc., and the degree of contamination is considerably small. May be. A factor that makes the solid particles appear white is that light is scattered on the surface of the solid particles.
Therefore, in the present invention, a refractive index adjusting agent can be added so that the solid particles become transparent without scattering light.

The refractive index adjusting agent may be any one which can be dissolved in a solution and can make solid particles appear transparent after application and after attachment to clothes, and various substances can be used. Examples of the refractive index adjusting agent include polyhydric alcohols such as ethylene glycol, ethylene glycol oligomer, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol oligomer, polypropylene glycol, and glycerin; alcohols such as isopropanol, butanol, and hexanol; Ethylene glycol methyl ether,
Glycol ethers and glycol ether acetates such as ethylene glycol ethyl ether, ethylene glycol methyl ether acetate, ethylene glycol ethyl ether acetate, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate, Nonionic surfactants, cationic surfactants, surfactants such as anionic surfactants, soluble resins such as polyethylene oxide, polyacrylamide, polyvinyl alcohol, polyvinylpyrrolidone, emulsified wax, modified wax, etc. Soluble waxes, volatile hydrocarbon solvents, oxygenated hydrocarbon solvents or silicone compounds. It is possible. These refractive index adjusters can be used alone or in combination of two or more according to the intended use.

The amount of the refractive index adjusting agent used in the present invention is preferably 1% by weight or more and less than 50%. If the amount of the refractive index adjuster is less than 1 wt%, the effect of the addition is not sufficient, and if it is more than 50%, the polishing effect is low. Further, assuming that the saturated absorption amount when the solid abrasive after drying absorbs the refractive index adjusting agent is 100, the addition amount of the refractive index adjusting agent to the solid abrasive is in the range of 20 to 200. preferable.

In the present invention, solid particles having a particle size of 0.010 μm or more and less than 1 μm can be used by dispersing them in a solvent. As the solvent used in the present invention, water, alcohols, polyhydric alcohols, volatile hydrocarbon solvents, oxygen-containing hydrocarbon solvents, silicone compounds and the like can be used. These solvents can be used alone or in combination of two or more according to the intended use.

Next, the effects of the hydrophilizing agent of the present invention will be described.
The hydrophilizing agent of the present invention can be used for glass, mirrors, enamels, ceramic products and the like. The surface of the object to be hydrophilized under normal use conditions is hydrophobized by the attachment of oil stains and the like. Since the hydrophilizing agent of the present invention contains solid particles having a particle diameter of 0.010 μm or more and less than 1 μm, oil stains and the like are removed by rubbing and polishing after application to the surface of an object, The original hydrophilicity of the surface of glass, mirrors, ceramics, etc. can be restored.

As a coating method, a hydrophilic agent can be sprayed on the treated surface, or can be soaked in a cloth, a nonwoven fabric, a sponge, or the like in advance to be applied. Since solid particles remain on the treated surface from which dirt has been removed by polishing, in the conventional method, the solid particles had to be removed by washing with water or the like.

The hydrophilizing agent of the present invention can use solid particles having a particle size of 0.010 μm or more and less than 1 μm as solid particles. Although particles having a small particle diameter are easily adsorbed on the treated surface, they are not conspicuous and do not always require washing with water.

Further, when solid particles having high hydrophilicity are selected, the hydrophilicity of the surface of the particles is extremely high, and the treated surface to which the particles are adsorbed can be made more hydrophilic. In addition, since the solid particles have a strong adsorptive power and are not easily removed by rainwater or the like, a hydrophilic effect can be exhibited for a long time, and the treated surface can be protected from contamination.

In the present invention, a refractive index adjusting agent can be added so that the solid particles appear transparent without scattering light. The refractive index adjusting agent may be any one which can be dissolved in a solution and can make solid particles appear transparent after application and after attachment to clothing, and various substances can be used.

For example, when a substance having high volatility is selected as the refractive index adjusting agent, it becomes easy to dry after coating, and is suitable when it is desired to remove solid particles by a dry wiping method. On the other hand, when a substance having low volatility is selected as the refractive index adjusting agent, it becomes difficult to dry after coating, and this is suitable when it is desired to remove solid particles by a method of washing with water.

Further, a refractive index adjusting agent can be selected for the purpose of adding another function at the same time as adjusting the refractive index. For example, when a soluble resin used in a conventional hydrophilizing agent is selected, it is possible to adjust the refractive index to make the resin transparent, and to further improve the hydrophilicity. In this case, since the hydrophilicity, transparency, durability and the like are high even when the hydrophilic agent is applied and dried as it is, it is not necessary to wipe it off even though it is a hydrophilic agent containing an abrasive.

The present invention is based on the above technical idea and is not limited to the embodiments but can be implemented or improved as follows. Addition of particles having a particle diameter of 1 micron or more as solid particles within a range that does not significantly impair the effects of the present invention. Addition of particles having a particle diameter of less than 0.010 microns as solid particles, as long as the effects of the present invention are not significantly impaired. Use of a colloidal dispersion of solid particles and a dispersion having properties equivalent to the colloidal dispersion. Use of silica and silica-containing compounds as solid particles. Use of colloidal silica, which is a colloidal dispersion of silica, and a dispersion having properties equivalent to colloidal silica as solid particles. -Use of glycols and derivatives of glycols as refractive index adjusters. -Use of saccharides and saccharide derivatives as refractive index adjusters. -Use of glycerin and derivatives of glycerin as refractive index adjusters. Use of waxes and derivatives of waxes as refractive index adjusters. -Use water-soluble resin and oil-soluble resin as the refractive index adjuster.・ The non-woven fabric and sponge attached to a manual device or an electric device should be impregnated with the refractive index adjuster and applied. -Spraying and spraying the refractive index adjusting agent using a manual or electric device.

[0036]

EXAMPLES (Example 1) As solid particles, Snowtex 20L (colloidal silica manufactured by Nissan Chemical Industries, Ltd.)
Particle size 0.040-0.05 micron Active ingredient 20
(~ 21 wt%) 50 g was diluted with pure water to 100 g to prepare the hydrophilizing agent of the present invention. Next, the nonwoven fabric was impregnated with the hydrophilizing agent of the present invention prepared by the above method, and the glass surface coated with the water repellent was subjected to a hydrophilizing treatment. Initially, the glass surface was flipped by a hydrophilizing agent, but it was not repelled by rubbing and polishing, confirming that the glass surface was hydrophilized. Further spraying of water did not change the hydrophilicity. (Example 2) As solid particles, 20 L of Snowtex
(Nissan Chemical Industries, Ltd., colloidal silica, particle size 0.040 to 0.050 micron, active ingredient 20 to 21)
wt%) and 5 g of dipropylene glycol as a refractive index adjuster were diluted to 100 g with pure water to prepare the hydrophilizing agent of the present invention. Next, the nonwoven fabric was impregnated with the hydrophilizing agent of the present invention prepared by the above method, and the glass surface coated with the water repellent was subjected to a hydrophilizing treatment. Initially, the glass surface was flipped by a hydrophilizing agent, but it was not repelled by rubbing and polishing, confirming that the glass surface was hydrophilized. Thereafter, the glass was transparent even when dried as it was without removing the hydrophilizing agent. Further spraying of water did not change the hydrophilicity. When the hydrophilizing agent of this example was adhered to a black cotton cloth, it did not turn white even after drying. (Example 3) As solid particles, Snowtex 20L
(Nissan Chemical Industries, Ltd., colloidal silica, particle size 0.040 to 0.050 micron, active ingredient 20 to 21)
wt%) and 5 g of polyvinyl porolidone as a refractive index adjuster were diluted to 100 g with pure water to prepare the hydrophilizing agent of the present invention. Next, the nonwoven fabric was impregnated with the hydrophilizing agent of the present invention prepared by the above method, and the glass surface coated with the water repellent was subjected to a hydrophilizing treatment. Initially, the glass surface was flipped by a hydrophilizing agent, but it was not repelled by rubbing and polishing, confirming that the glass surface was hydrophilized. Thereafter, the glass was transparent even when dried as it was without removing the hydrophilizing agent. Further spraying of water did not change the hydrophilicity. When the hydrophilizing agent of this example was adhered to a black cotton cloth, it did not turn white even after drying.

[0037]

The hydrophilizing agent according to claim 1 has a particle diameter of 0.010 μm or more as solid particles and
Because it is a hydrophilizing agent characterized by containing only submicron particles, the treated surface can be made hydrophilic by polishing, and at the same time, the hydrophilic effect is maintained for a long time by adsorbing solid particles on the treated surface, Does not contaminate when it gets on clothing. The hydrophilizing agent according to the second aspect can further stabilize the solid particles by dispersing the solid particles in a colloidal state. The hydrophilicity-imparting agent according to claim 3 can improve the polishing effect and the transparency by using silica as the solid particles. The hydrophilic agent described in claim 4 can further improve the transparency and reduce the contamination by further adding a refractive index regulator to the solid particles. The hydrophilizing agent according to claim 5 can be used by impregnating it into a nonwoven fabric and a sponge, thereby improving the efficiency of the polishing operation. By spraying the hydrophilizing agent according to claim 6 on the treated surface, the efficiency of the application operation of the hydrophilizing agent can be improved. The hydrophilizing agent according to claim 7 is a hydrophilizing agent containing an abrasive, and is characterized in that it becomes transparent after drying or can be used without wiping, so that it is necessary to wipe it off. And can be used easily.

Claims (7)

[Claims] 1. A hydrophilizing agent comprising only solid particles having a particle size of 0.010 μm or more and less than 1 μm. 2. The hydrophilizing agent according to claim 1, wherein the solid particles are dispersed in a colloidal state. 3. The hydrophilizing agent according to claim 1, wherein silica is used as the solid particles. 4. The hydrophilizing agent according to claim 1, wherein a refractive index modifier is further added to the solid particles. 5. The hydrophilizing agent according to claim 1, which is used by impregnating in a nonwoven fabric and a sponge. 6. The hydrophilizing agent according to claim 1, which is used by spraying on a treated surface. 7. A hydrophilizing agent containing an abrasive, which is transparent after drying or can be used without wiping.