JPH06146209A - Finish method of surface of resin pavement - Google Patents

Abstract

PURPOSE:To improve slide prevention property by applying thioxotropy polyurethane material which contains minute hollow balls which have specific diameter as the surface layer material on the surface of resin pavement which has recessed and projection sections of specific height or does not have them and exposing the hollow balls on the surface. CONSTITUTION:Polyurethane resin is applied by the predetermined thickness to cover the surface of concrete road, and recessed and projection finish having the height of 1 to 3mm is applied as required to prepare the surface of resin pavement. Next, silica like ultra minute particles is added on polyurethane resin to give thioxotropy. Then, minute hollow balls having particles diameter of 1mm or less such as alumina silicate are blended. This is applied on the surface of resin pavement to expose minute hollow balls on the surface. Consequently, it is possible to improve slide characteristics at the time of lubrication, maintain the surface recessed and projection pattern in the shape close to the original shape, and give soft feeling and durability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing slippage of a resin pavement surface when wet, and in particular, finishing of a pavement surface for the purpose of preventing slippage on a ground paved with a polyurethane resin, an athletics track, a jogging track, etc. Regarding the method.

[0002]

2. Description of the Related Art Conventionally, various kinds of resin pavement materials have been known and are used on the ground, running track, jogging track and the like. In particular, when this resin pavement material is used in outdoor facilities, the all-weather feature is utilized, and thus the demand for it has been increasing in recent years. Above all, polyurethane elastic pavement materials are particularly excellent because they have excellent physical properties and are easy to construct. However, since these polyurethane pavement materials have a remarkable gloss after construction, they have the drawbacks that they tend to reflect the sun's rays, have a smooth surface, and tend to slip during competition, especially outdoors.

In order to prevent these drawbacks, a method of soaking a tip of polyurethane or other rubber, that is, a so-called topping finishing method has been conventionally used mainly after the construction and before the curing. However, the surface of the pavement finished with toppings wears or falls off during long-term use, the feeling of running changes gradually, loss of time occurs due to lateral shake during running, and skidding occurs during rainfall. Problems such as the occurrence of problems have come to be pointed out. Therefore, recent research and improvement of the surface finishing method of polyurethane pavement surface has been carried out, and a method of finishing to a rough surface without using chips, a so-called rough surface finishing method is becoming the main role. As a rough surface finishing method, for example, JP-A-3-228902 describes a method of finishing a thixotropic urethane resin composition with a roller to give an uneven pavement surface.

[0004]

The problem of the rough surface finishing method as described above is that the sliding property when wet is poor. Therefore, there are drawbacks such that the athlete tends to slip and fall easily, especially in the rain. Therefore, in order to improve the sliding property when wet, JP-A-58-29902 discloses that glass beads having a specific particle size are provided on the surface of a uniform elastic layer composed of a rubber chip layer or a urethane coating film bonded with a binder. A method for improving the slip resistance of the coat when wet by adhesion is described. This method is a method in which glass beads are added to a coating film forming material such as an acrylic emulsion, vinyl acetate, an acrylate copolymer emulsion, a urethane paint or an epoxy paint, and the glass beads are applied and fixed on the surface. In this method, the material is a solution type without thixotropy, and since the glass beads themselves have a large specific gravity of about 2.5, separation easily occurs after mixing, and since they are a solution type, they are particularly applied to uneven surfaces. In that case, the material is likely to accumulate in the recesses, the surface pattern is likely to change, and the sliding property when wet is poor.

[0005]

As a result of studies on a method for obtaining a pavement surface which is highly durable and is particularly effective in preventing slippage in the rain, the present inventors have found that a polyurethane material having thixotropy has a low specific gravity. By coating the resin containing the micro hollow spheres, the micro hollow spheres can be uniformly exposed on the surface and a stable surface pattern can be obtained, and the surface pattern before and after coating does not change, and there is a soft feeling. The present invention has been completed by finding a finishing method which is excellent in durability and weather resistance, and at the same time has an excellent anti-slip effect when wet.

That is, according to the present invention, (1) a material obtained by coating a resin pavement surface with a thixotropic polyurethane material containing minute hollow spheres as a surface layer material is applied,
A method for finishing a resin pavement surface, which comprises exposing minute hollow spheres to the surface. (2) The method for finishing a resin pavement surface according to (1), wherein the material of the hollow microspheres is an alumina silicate type, and the particle size is 1 mm or less in diameter. (3) The method for finishing a resin pavement surface according to (1), wherein the resin pavement surface is a polyurethane resin pavement surface and has an uneven surface. (4) The method for finishing a resin pavement surface according to (3), wherein the uneven surface has a height of 1 to 3 mm. Is.

In the present invention, the resin paving surface may be one using various resins, but a paving surface made of a polyurethane resin is particularly preferable, and paving can be carried out according to a known paving method. Known polyurethane pavement methods include, for example, Japanese Patent Publication No. 44-22914 and Japanese Patent Laid-Open No. 48-196.
Although there is a method described in Japanese Patent Publication No. 43, etc., various methods using a known polyurethane material system are possible. In general, a so-called two-component system, that is, a polyisocyanate or a prepolymer obtained by previously reacting a part of the isocyanate group of the polyisocyanate with a polyol and a known polyol, polyamine, filler, plasticizer used in urethane chemistry, Method to mix components such as catalyst, pigment, stabilizer at room temperature, and to coat on concrete, asphalt concrete, asphalt concrete, and asphalt concrete that has been pretreated with primer to a thickness of 5 to 30 mm if necessary. It is constructed by. Depending on the selection of the raw material polyol, polyether urethane, polyester urethane, acrylic urethane, or other modified urethane can be used.

In addition to a two-pack system, a one-pack system in which a filler, a plasticizer, a catalyst, a pigment, a stabilizer and the like are mixed in a prepolymer having an excess of isocyanato groups and the mixture is cured by the moisture in the air, a solution-type heat Of course, a plastic polyurethane blend, a polyurethane emulsion blend, etc. can also be used. The construction is carried out by a batch type manual work, or when the area is large, it is carried out by a continuous method using a machine as described in Japanese Patent Publication No. 44-022914. It is also possible to use a so-called prefabricated construction method in which sheets manufactured in advance in a factory are bonded together on site. Rubber in polyurethane material,
A method of adding a foam or other aggregate is also widely used.

As a method of finishing unevenness on the surface of the resin pavement, for example, a thixotropic material is used as a polyurethane material, which is evenly laid and then rolled by using a mastic roller to give unevenness.
The height of the unevenness can be freely selected according to the purpose.

The thixotropic polyurethane material is mainly a well-known polyurethane material system which gives the above-mentioned various polyurethane resins, to which thixotropic material is added by adding a thixotropic material such as ultrafine silica. It is suitable to add a solvent or the like as needed. The necessity of imparting thixotropy to the surface layer material is to uniformly expose the aggregate of the micro hollow spheres to the pavement surface. As a result, the surface layer material does not collect in the valleys of the uneven portion of the pavement surface, the surface shape before coating is maintained, and a uniform surface pattern can be obtained.

The micro hollow spheres used in the present invention include:
Whether it is an inorganic type or an organic type, it is a hollow granular material having a particle size of 1 mm or less, more preferably 500 μ or less, but particularly preferred is an alumina silicate type, which is commercially available. For example, there is Philite 52/7 (FG) manufactured by Nippon Philite. The particle size distribution of this product is (300-150μ) about 20%, (150-75μ) about 50%, (7
5 to 45 μ) about 25% and (45 μ or less) about 5%. In addition, there is a product name SILLICA BALLOONS (average particle diameter of 210 microns or less) manufactured by Kushiro Coal Dry Distiller Co., Ltd. and a product name Sankilite manufactured by Sanki Industry Co., Ltd.

The blending amount of the micro hollow spheres is 3 to 25 PH in weight ratio with respect to the solid content of the polyurethane material having thixotropy.
R, especially about 7 to 20 PHR is suitable. 25 PHR
If it is put in the above-mentioned manner, it will enter the concave portion of the uneven pattern and lose the soft feeling of the surface hardness, and at the same time the target uneven pattern will change. On the other hand, if it is 5 PHR or less, the effect of preventing slippage when wet becomes small, which is not suitable.

There are various thixotropic agents, but those having particularly excellent thixotropic effects are commercially available ultrafine silica such as Erosir, Carbosil, Hi-seal, Ultraseal, Carplex, Syloid, Nipseal and the like. . The ultrafine particle silica basically has SiO ₂ as a main component, but in particular, modified products containing components such as Al ₂ O ₃ and TiO ₂ are commercially available and can be used. In addition, various commercially available thixotropic agents can be used.
An appropriate amount of the ultrafine silica to be compounded is about 5 to 10% by weight based on the solid content in the main polyurethane material system. As the solvent, a non-polar solvent such as toluene or xylene, a polar solvent such as ethyl acetate or methyl ethyl ketone, or a mixture of both is used.

It is preferable that the hollow hollow spheres are added to and mixed with the thixotropic polyurethane material and then used as soon as possible. As a coating method, a brush, a roller,
It can be done with a spray gun or the like. For example, a commercially available woo roller (made by Otsuka Brush Co., Ltd.) or an airless spray (Bi
(manufactured by nks company) or the like can be used. The application amount of the thixotropic material can be freely selected according to the purpose. In addition, when applying, it is necessary to consider the adhesiveness to the resin pavement surface.

According to the present invention, the portable skid resistance (ASTM E-3 is shown in the following embodiment.
As a result of measuring the slip resistance value of the surface wet with water by the test method of 03-74), a stable anti-slip effect was obtained, a soft feeling was maintained, and a stable uneven pattern was maintained. The front and rear surface patterns do not change, and a surface with good durability and weather resistance can be obtained. In addition, the workability is good and the application method is simple and economical.

[0016]

EXAMPLES The method of the present invention will be described below with reference to examples. Parts in the examples represent parts by weight. Example 1 Polyoxypropylene glycol having an average molecular weight of 2000 and an average molecular weight of 5000 as the component A of the polyurethane resin.
Polyoxypropylene triol (1) was reacted with an excess amount of tolylene diisocyanate (2,4-form / 2,6-form = 80/20) by a conventional method to give a terminal isocyanato group content of 2.9.
% Prepolymer was prepared. Further, methylene bis (o-chloroaniline) as the B component and an average molecular weight of 3000
Polyoxypropylene glycol and average molecular weight 500
Liquid polyamine containing 0 polyoxypropylene triol (44 parts), pigment (6 parts), calcium carbonate (44 parts), liquid additive (dioctyl phthalate) (3 parts), lead octylate catalyst (2 parts), and weathering stabilizer (Nocrac NBC) (1) A mixture of parts was prepared. Both A and B components are NCO /
After mixing at a H equivalent ratio of 1.05 and pouring it on an asphalt concrete base and paving polyurethane resin, the same material was blended with Erosil # 200 to give a thixotropic material with a thickness of 2 mm. It was applied and rolled with a mastic roller to give an uneven resin pavement surface having an average height of about 2 mm. Next, for the above-mentioned A and B components 10 and 9 parts, ultrafine silica (Erosil 200) 1.1
Part and toluene 11 parts were added and mixed to the thixotropic material obtained by mixing, and 1.6 parts of Philite 52/7 (FG) manufactured by Nippon Philite Co., Ltd. was added and mixed to obtain a material. (Short hair) was applied at 0.3 kg / m ² . On the surface after curing, fine hollow spheres were uniformly exposed on the uneven surface, and the uneven shape did not fill the valleys of the unevenness, and the uneven shape was kept the same as before coating. As a result, as shown in Table 1, the slip resistance when wet was large and showed a stable value, and the surface unevenness pattern maintained the same shape as before coating, and a paved surface having a soft feeling and durability was obtained.

Example 2 The same procedure as in Example 1 was repeated except that 1.6 parts of Philite 52/7 (FG) was added to 3.7 parts. As a result, the sliding resistance when wet was larger than that of Example 1 and showed a stable value, and the surface unevenness pattern maintained the same shape as before coating, and a good paved surface similar to Example 1 was obtained.

Example 3 The average height of irregularities on the surface of the polyurethane resin pavement is about 3 mm.
Main component / curing agent of the top coat GS (Taisei Kako Co., Ltd., thixotropic material having a solid content of about 50%) mainly composed of a two-liquid type acrylic urethane resin on the uneven surface of 10 parts / 30
0.3k of airless spray (manufactured by Binks) with 2 parts of Philite 52/7 (FG) added and mixed in 1 part mixture
g / m ^{2 was} applied. On the surface after curing, fine hollow spheres were uniformly exposed on the uneven surface, and the uneven shape did not fill the valleys of the unevenness, and the uneven shape was kept the same as before coating. As a result, as shown in Table 1, the slip resistance when wet showed a large and stable value, the surface unevenness pattern maintained the same shape as before coating, and the same good paving surface as in Example 1 was obtained.

Example 4 The procedure of Example 3 was repeated except that 1.6 parts of Philite 52/7 (FG) was added to 3.7 parts, and the other processes were the same. As a result, the sliding resistance when wet was larger than that of Example 3 and showed a stable value, and the uneven surface pattern maintained the same shape as before coating, and a pavement surface having a soft feeling and durability was obtained.

Comparative Example 1 The height of irregularities on the surface of the polyurethane resin pavement is about 2 mm on average.
1.1 parts of ultrafine particle silica (Erosil 200) with respect to 10 parts and 9 parts of the above-mentioned components A and B,
The thixotropic material obtained by adding 11 parts of toluene and mixing was 0.3 kg / m with an Otsuka brush Wooller brush (short hair).
² applied. The surface after curing was not glossy and a surface having excellent durability was obtained, but as shown in Table 1, the slip resistance value when wet was small and the surface was slippery in the rain.

Comparative Example 2 The height of irregularities on the surface of the polyurethane resin pavement is about 3 mm on average.
It was obtained by mixing 10 parts / 30 parts of the main agent / hardening agent of the top coat GS (manufactured by Taisei Kako Co., Ltd., solid content: about 50%) containing a two-component acrylic urethane resin as the main component on the uneven surface of The thixotropic material was applied by airless spray (manufactured by Binks) at 0.3 kg / m ² . The surface after curing had no gloss and was excellent in durability, but as shown in Table 1, the slip resistance value when wet was small and the surface was slippery in rain.

Comparative Example 3 The average height of irregularities on the surface of the polyurethane resin pavement is about 3 mm.
Color top SS (Mitsui Toatsu Chemicals Co., Ltd.) whose main component is a 2-liquid type acrylic urethane resin
2% of Philite 52/7 (FG) was added to the non-thixotropic material obtained by mixing 10 parts / 10 parts of the main agent (solid content: about 50%) / hardening agent.
0 part was added and mixed uniformly. This material was applied at 0.3 kg / m ² with a woo roller brush (short hair) made by Otsuka Brush.
On the surface after curing, phyllite 52/7 (FG) was accumulated in the valleys of the unevenness, and the unevenness pattern was changed. Moreover, as shown in Table 1, the slip resistance value when wet was small and the surface was slippery in the rain.

[0023]

[Table 1]

[0024]

The resin pavement surface, especially the uneven surface, is coated with a resin containing a thixotropic polyurethane material containing fine hollow spheres to expose the fine hollow spheres to the surface.
The slip characteristics when wet are improved. The pattern of surface irregularities keeps almost the same shape as before coating, and a soft and durable pavement surface can be obtained.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiharu Shibahara 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd.

Claims (4)

[Claims] 1. A method for finishing a resin pavement surface, which comprises applying a material containing a fine hollow sphere to a polyurethane material having thixotropy as a surface layer material on the resin pavement surface to expose the fine hollow spheres to the surface. . 2. The micro spheres are made of alumina silicate and have a particle diameter of 1 mm or less.
A method for finishing a resin pavement surface as described. 3. The method for finishing a resin pavement surface according to claim 1, wherein the resin pavement surface has an uneven surface as a pavement surface made of a polyurethane resin. 4. The height of the uneven surface is 1 to 3 mm.
A method for finishing a resin pavement surface as described.