JPH11302419A - Antifouling resin product and its preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antifouling resin product which has a high antifouling property and maintains the antifouling property over a long time. SOLUTION: An antifouling resin product is prepared by applying an antifouling agent on the surface of a resin substrate wherein an SiO2 -containing filler is exposed at 10% or more, in area ratio, of the surface. In a preparation process of this antifouling resin product, the surface of the substrate comprising a resin material, wherein an SiO2 -containing filler is blended, is removed to expose the filler, and then the surface is coated with an antifouling agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antifouling resin product and a method for producing the same, and more particularly, to an antifouling resin product which is hardly stained and which can be easily removed even if it is once adhered. And its manufacturing method.

[0002]

2. Description of the Related Art In the case of resin products around water, for example, in a bathtub, dirt such as descaling tends to adhere to the surface. It cannot be easily removed by washing with water. For this reason, frequent cleaning is required, and a large amount of labor and time is required for cleaning, such as rubbing with a scrubber or the like using a cleaning agent.

[0003] Japanese Patent Application Laid-Open No. 9-56625 discloses a fourth method.
Lines 8 to 10 on the right column of the page and Table 1 show that the surface of the artificial marble bath is coated with polytetrafluoroethylene as a fluorine-based resin having excellent water repellency, and dirt hardly adheres. .

[0004]

However, if the surface of the resin bath is simply coated with a fluororesin, the coating film on the surface will peel off over time, and the antifouling property of the fluororesin coating film will be reduced. Is difficult to maintain for a long time.

That is, even if the surface of a resin product is coated with a fluororesin, the bonding property between the resins is low, so that the coating film peels off due to physical irritation during use or cleaning or due to chemical action of a cleaning agent. easy.

The present invention solves the above-mentioned conventional problems and provides an antifouling resin product excellent in antifouling property, capable of maintaining the antifouling property for a long period of time, and a method for producing the same. The purpose is to do.

[0007]

According to the antifouling resin product of the present invention, a filler containing SiO ₂ is present on the surface in an area ratio of 10%.
% Or more of the surface of the resin substrate, which is exposed, is coated with an antifouling agent.

The method for producing an antifouling resin product of the present invention
After removing the surface of the substrate made of a resin material containing a filler containing iO ₂ and exposing the filler,
The surface is coated with an antifouling agent.

By exposing the filler containing SiO ₂ on the surface, the resin molecules (for example, terminal groups) in the antifouling agent are bonded to the exposed filler SiO ₂ , and the coating film is formed on the surface of the resin substrate. It becomes firmly attached and formed. Therefore, peeling of the coating film of the antifouling agent is prevented, and the antifouling property of the coating film can be maintained for a long time.

In the following, the area ratio of the surface of the resin substrate where the filler containing SiO ₂ is exposed is referred to as “surface exposure ratio”.

[0011]

Embodiments of the present invention will be described below in detail.

To produce the antifouling resin product of the present invention,
First, the surface of the substrate made of a resin material mixed with a filler containing SiO ₂ is polished with abrasive paper or removed by sandblasting to expose the filler.

The filler containing SiO ₂ includes silica sand, talc, glass and the like. Accordingly, silica sand, talc and glass powder as a filler, glass fiber as a reinforcing material and the like can be mentioned.

By exposing the filler containing SiO ₂ to the surface of the resin substrate, the SiO ₂ of the exposed filler is exposed.
The antifouling agent coating film can be firmly fixed to the resin surface by the bonding force between the antifouling agent and the antifouling agent molecules.

In the present invention, if the surface exposure ratio of the filler containing SiO ₂ is less than 10%, the effect of fixing the coating film cannot be sufficiently obtained. Therefore, this surface exposure ratio is preferably at least 10%, particularly preferably at least 25%. In addition, from the upper limit of the compounding amount of the filler of the resin product,
Since it is difficult to increase the surface exposure ratio to more than 68%, it is usually set to 68% or less.

In the present invention, the resin material constituting the resin substrate may be either a thermosetting resin or a thermoplastic resin, and the composition thereof is not particularly limited. The surface exposure ratio is appropriately adjusted according to the required viscosity and other physical properties so that the above-mentioned surface exposure ratio can be obtained within a range of a suitable composition.

[Blend of resin material (parts by weight)] Resin: 100 Filler and reinforcing material: 100 to 300 Other additives such as thickener, hardener, release agent: 6 to 4
In the present invention, the antifouling agent coated on the resin substrate having been subjected to such a surface treatment is preferably a water / oil repellent from the viewpoint of preventing the adhesion of dirt and removing the dirt attached. Is polytetrafluoroethylene (PT
FE) and the like. The fluororesin coating film is preferably formed to a thickness of about 1.5 to 50 μm.

The antifouling resin product of the present invention can be used for bathtubs, washbasins, around kitchens, around toilets (toilet lids, tanks, etc.), waterproof pans for washing machines, etc., wall and floor materials for unit baths, and drainage outlets. It can be used as a constituent material around water, such as a lid, and its excellent antifouling property and antifouling sustaining effect can prevent adhesion of dirt for a long time,
Further, even when dirt is attached, the dirt can be easily removed by wiping it with a rag or the like.

[0019]

The present invention will be described more specifically below with reference to examples and comparative examples.

Example 1 A molding material having the following composition was molded according to a conventional method, and the inner surface was polished with abrasive paper, followed by buffing to finish. The surface exposure ratio of the filler (glass fiber and filler in this example) containing SiO ₂ in the obtained resin substrate was 46%.

[Molding material composition (parts by weight)] Unsaturated polyester-based thermosetting resin: 100 Filler (fine silica sand, talc): 150 Glass fiber: 80 Others (thickener, hardener, release agent, etc.) : 15 This resin substrate was coated with a water / oil repellent containing tetrafluoroethylene as a main component, dried at 150 ° C. for 30 seconds, and then aged at 60 ° C. for 3 days to a thickness of 50 μm.
The following coating film was formed.

The resin substrate thus formed with the coating film was subjected to a dirt adhesion test and an oil repellency test by the following methods, and the results are shown in Table 1.

[Stain Adhesion Test] Fresh water was placed in a bathtub by 180 L, and the sample was hung so as to have a draft surface.

After four or more people take a bath in this state, they are allowed to stand until the next morning. Thereafter, the sample was taken out and stained with a staining solution (safranin 1 g / L aqueous solution).
The evaluation was made in three stages: a large amount of dirt adhered (汚 れ) and a very large amount of dirt adhered (×).

[Oil repellency test] Using oleic acid, the contact angle (0.9 μL) of the sample surface and the falling angle (0.675 /
sec) is measured.

Example 2 Except that a molding material having the following composition was used as the molding material, and the surface exposure ratio of the filler containing SiO ₂ (the filler in this example) was 54% by polishing the surface. A resin substrate on which a coating film of a water / oil repellent was formed was produced in the same manner as in Example 1, and a dirt adhesion test and an oil repellency test were similarly conducted. The results are shown in Table 1.

[Molding material composition (parts by weight)] Thermosetting unsaturated polyester resin: 100 Filler (glass powder): 300 Others (thickener, curing agent, release agent): 15 Comparative Example 1 Example In Example 1, each test was performed in the same manner except that the surface polishing of the molded resin substrate and the formation of the coating film were not performed, and the results are shown in Table 1.

[0028]

[Table 1]

In Examples 1 and 2, dirt slightly adhered in the dirt adhesion test could be easily removed by wiping lightly with a rag.

Examples 3 and 4 and Comparative Example 2 In Example 1, the surface exposure ratio of the filler containing SiO _{2 was} changed to the ratio shown in Table 2 by changing the amount of glass fiber used as the molding material and the polishing conditions. A resin substrate having a coating film formed thereon was manufactured in the same manner except that the above process was performed.

The resin substrate was evaluated for blistering by a boiling resistance test using hot water at 90 ° C. to examine the durability of the coating film. The results are shown in Table 2.

[0032]

[Table 2]

According to Table 1, by setting the surface exposure ratio of the filler containing SiO ₂ to 10% or more, the durability of the coating film is remarkably improved, and the antifouling property can be maintained for a long time. You can see that.

[0034]

As described above in detail, according to the present invention, the coating of the surface with an antifouling agent makes it difficult for dirt to adhere thereto, and the antifouling resin which can easily remove the adhered dirt. Products are provided. Moreover, since the coating film of the antifouling agent according to the present invention is firmly bonded to the resin substrate and is difficult to peel off, the antifouling property of the coating film is maintained for a long time.

Claims (2)

[Claims] 1. An antifouling resin product, characterized in that a surface of a resin substrate having a surface area of 10% or more of a filler containing SiO _{2 component} is coated with an antifouling agent. 2. An antifouling agent, comprising: removing a surface of a substrate made of a resin material containing a filler containing SiO ₂ , exposing the filler, and coating the surface with an antifouling agent. A method for producing a soil resin product.