JPH03180601A - Finishing of resin-paved surface - Google Patents

Abstract

PURPOSE:To achieve durability by spraying a material consisting of polyurethane resin composition as base blended with specified ultra-fine grains of silica and polyethylene glycol or its ether or ester for forming a paved surface having irregularities. CONSTITUTION:For a surface finishing material, a known polyurethane material system is used as main body, and ultra-fine grains of silica of an average grain size of less than 30mu and a BET specific surface area of more than 100m<2>/g and polyethylene glycol or the like are blended therewith. For the ultra-fine grains of silica, SiO2 is included as a main component basically, and Al2O3 and TiO2 can be used. Together with the ultra-fine grains of silica for obtaining a surface having irregularities, an active hydrogen compound of polyethylene glycol of an average molecular quantity of 100-20,000 is blended. A paved surface having a proper resiliency and having irregularities can thus be formed without allowing slipping.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of finishing the surface of an athletic field or jogging track, and more particularly to a method of finishing a ground or jogging track paved with polyurethane resin.

[Conventional technology]

Various types of polymeric elastic paving materials have been known, and these paving materials are used for grounds, jogging courses, gymnasiums, and the like.

In particular, when this paving material is used for outdoor facilities, its all-weather characteristics are utilized, so the demand for it has increased in recent years. Among these, polyurethane elastic materials are particularly excellent because they have excellent physical properties and are easy to construct. However, these polyurethane paving materials are extremely glossy after construction, so
Particularly when playing outdoors, it tends to reflect sunlight and has a smooth surface, making it easy to slip during competitions.

In order to prevent these drawbacks, after construction as a conventional method,
A method of sprinkling polyurethane or other rubber chips before curing is used, but the paved surface obtained by this method has problems such as chips coming off during use and stains becoming noticeable. It had been pointed out.

[Problem to be solved by the invention and means for solving the problem]

The present inventors have conducted intensive studies on a method for preferably imparting an uneven pattern to the surface of a polyurethane paving material and obtaining a highly durable paved surface. The present invention was completed by discovering that a beautiful, durable, moderately uneven surface can be obtained by spraying a material containing silica and polyethylene glycol onto the surface of a resin paved according to a known resin paving method. reached.

That is, the present invention is as follows.

As a finishing method for the pavement surface of elastic resin pavement (a), a polyurethane resin composition is used as a base, and (A) an average particle size of 30 microns or less and a specific surface area of 1 by BET method are added.
00rrf/g or more ultrafine particulate silica, (B) polyethylene glycol with an average molecular weight of 100 to 20.000,
A method for finishing a resin pavement surface, the method comprising spraying a material blended with the ether or the ester thereof to form an uneven pavement surface.

As already stated, the object of the present invention is to provide a paved surface that has an uneven pattern and is highly durable.

The method of the present invention involves applying a base resin according to a known paving method, preferably using polyurethane, and then using a tile gun or a reshin gun to apply a material that is mainly composed of polyurethane and mixed with ultrafine particulate silica, polyethylene glycol, and other auxiliary agents. This is done by applying it.

As a known polyurethane paving method, for example,
4-0229], JP-A No. 48-019643, etc., or generally a so-called two-component system, i.e., polyisocyanate or a part of the isocyanate group of polyisocyanate is converted into a polyol. The prepolymer obtained by the preliminary reaction is mixed at room temperature with known components used in urethane chemistry such as polyols, polyamines, fillers, plasticizers, catalysts, pigments, stabilizers, etc. It is constructed by coating concrete, asphalt concrete, etc. to a thickness of 5 to 30 mm to a thickness of 5 to 30 mm. In this case, polyurethane or other rubber aggregates may be added.

There are also one-component systems, solution-type thermoplastic polyurethane formulations, and polyurethane emulsion formulations in which fillers, plasticizers, catalysts, pigments, stabilizers, etc. are mixed into a prepolymer with an excess of isocyanate groups, and the mixture is cured by moisture in the air. , of course, can be used.

Construction is carried out manually in batches, or in the case of large areas, 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 prefabrication method in which sheets manufactured in advance at a factory are glued together on site.

The surface finishing material used in the present invention is mainly composed of the above-mentioned known polyurethane material system, which has an average particle diameter of 30 μm or less and a specific surface area of 100 rr by BET method. / g or more of ultrafine particle adhesive strength and polyethylene glycol or its derivatives are used.

Average particle size 30 microns or less and specific surface area 100rd
As examples of ultrafine particulate silica with a particle size of /g or more, there are various commercially available grades such as Erosil, Carbosil, Hi-Seal, Ultra Seal, Carplex, Thyroid, and Nip Seal.In particular, Engineering Rosil #200 and #380 are thixotropic. It has excellent effects.

Incidentally, the ultrafine particulate silica basically has 5I02 as its main component, but modified products containing other components such as Al2O3 and TlO2 are also commercially available, and these can also be used. The amount of ultrafine particulate silica is usually 0.0% by weight relative to the solid content in the main polyurethane material system.
Approximately 5 to 1006 is appropriate.

In order to increase the effect of unevenness, it is sufficient to increase the blended amount, or if the amount is increased more than necessary, the physical properties will deteriorate, which is not preferable. In addition, when the polyurethane material system contains volatile components other than the solvent, the solid content means the remaining components after subtracting the volatile components.

An uneven surface? In addition to ultrafine particulate silica, polyethylene glycol with an average molecular weight of 100 to 20,000, which is an active hydrogen compound (or its arbitrary di-terification)
esterified derivative). The blending amount is suitably 0.01 to 50% by weight based on the solid content in the polyurethane material system.

Usually a solvent is also used, but the amount is 1 to 50
Weight % is appropriate.

It is preferable to use the coating material as soon as possible after preparation.

One method of spraying may be a tile gun or a ricing gun, but if a tile gun is used, the surface will be noticeably uneven.

The amount of material applied is usually 500g per lrd as solid content.
3 to 3 kg is sufficient. However, the solid content here refers to the solid content in the coating material, and means the solid content in the polyurethane material system plus ultrafine particulate silica and inorganic filler bones.

From the viewpoint of adhesion with the base resin, it is preferable to apply it relatively early, about 6 to 100 hours after the base resin has been applied, or if the stickiness has already disappeared, use various solvents, brimer, etc. If you apply it to the base resin, or after polishing the surface of the base resin to make it uneven, it will adhere completely. Note that the base resin is not necessarily limited to polyurethane, and may be other resins such as epoxy, acrylic, SBR, or vinyl chloride, but polyurethane is most preferred in practice. As a construction method, a method is usually used in which a base resin is applied on-site after construction, or a so-called prefabricated construction method, in which resin sheets applied at a factory are glued together on-site, is also possible.

According to the present invention, a material made by blending ultrafine particulate silica, polyethylene glycol, and a solvent with a special thixotropy imparting effect to a conventionally known polyurethane material system can be simply applied to the surface of the base resin using a tile gun or a ricing gun. This is an economical method that provides a highly durable and high-performance paved surface with moderate roughness, and its effects are extremely significant.

〔Example〕

The method of the present invention will be explained below with reference to Examples.

Example 1 Polyoxypropylene glycol with an average molecular weight of 2.000 and excess tolylene diisocyanate (2,4 unit/2,
A prepolymer having a terminal isocyanate group content of 5.2% was produced by reacting the prepolymer with 6 monomers (80/20) in a conventional manner.

In addition, 32 kg of liquid polyamine containing methylenebis(0-chloroaniline) as component B, 20 k
g, heavy calcium carbonate 20kg, liquid additive 28kg
.

A formulation consisting of 4 kg of tin catalyst and 1 kg of weathering stabilizer was prepared.

Stir and mix the above A and B114 components at a weight ratio of 1:1,
Paving was carried out to a thickness of 12 mm by pouring it onto a concrete base coated with a primer in advance. Pot life was about 50 minutes. After about 20 hours, when the surface of the base resin is slightly sticky, add Component A 10.
0kg, B component 100kg, Erosil #200 7
kg, polyethylene glycol (molecular weight 3.000)
Using a tile gun equipped with a 5mm diameter tip, 5kg of 1.0kg of toluene and 35kg of toluene were stirred and mixed.
By spraying at an air pressure of -f/ai, a surface uniformly coated with convexities of 1-2 mm in height and 2-6 mm in diameter was obtained. This surface has outstanding performance especially for athletics stadiums,
It had a characteristic that its performance did not change over time.

Example 2 In Example 1, 7 kg of Erogil #380 was used instead of 0.7 kg of Erogil #20, 1.0 kg of polyethylene glycol (molecular weight 5.000) was used instead of 1.0 kg of polyethylene glycol (molecular weight 3.000), and toluene was also used. Stir and mix 35 kg of material into a diameter of 3 mm.
5kg-f/c by attaching a tip or using a Shingun.
Spray with air pressure of m2, height 1-1.5 mm, diameter 2
~4 mm convexities were evenly coated.

〔Effect of the invention〕

By the finishing method of the present invention, a paved surface can be obtained which has appropriate elasticity, an appropriately uneven surface, low light reflection, a matte surface with no risk of slipping, and furthermore, excellent strength and durability.

Procedural amendment (voluntary) January 8, 1991

Claims (2)

[Claims] (1) As a method for finishing the pavement surface of elastic resin pavement (a), a polyurethane resin composition is used as a base, and (A
) Ultrafine particulate silica with an average particle diameter of 30 microns or less and a specific surface area of 100 m^2/g or more by BET method, (B
) A method for finishing a resin pavement surface, which comprises spraying a material blended with polyethylene glycol having an average molecular weight of 100 to 20,000, its ether, or its ester to form an uneven pavement surface. (2) The method for finishing a resin pavement surface according to claim (1), wherein the elastic resin pavement (a) is a polyurethane resin composition.