JP2854172B2 - Finishing method of resin pavement surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an athletic ground,
The present invention relates to a method of finishing a surface of an athletics runway, a jogging runway, or a golf course walkway, and more particularly to a method of finishing a surface of a ground, an athletic runway, a jogging runway, or a golf course walkway paved with a polyurethane resin.

[0002]

2. Description of the Related Art Conventionally, various polymer elastic pavement materials are known, and these pavement materials are used for grounds, jogging courses, gymnasiums and the like. Especially when this pavement material is used for outdoor facilities, all weather features are utilized,
In recent years, the demand has been increasing. 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 tend to reflect the sun's rays and have a smooth surface, especially outdoors, and slip during competitions, especially in rain or when there is moisture on the surface after rain. It has the disadvantage that it is easy to do.

[0003] In order to prevent these drawbacks, a method has conventionally been adopted in which a chip of polyurethane or other rubber is dispersed and fixed mainly at the point of time after application and before curing. JP-B-53-006475 and JP-B-56-040205 propose a method of spraying a thixotropic polyurethane resin on the surface. However, the degree of unevenness is insufficient as the surface roughness increases. Particularly, as in the method described in Japanese Patent Publication No. 56-040205, a polyurethane resin imparted with thixotropic properties only by a powder thixotropic agent has a high viscosity, and the spraying operation itself is extremely difficult. In the region, thixotropic properties are insufficient and effective irregularities cannot be obtained. In addition, problems have been pointed out on the pavement surface obtained by these methods, such as chips coming off during use and conspicuous dirt.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention and Means for Solving These Problems The present inventors have made the invention of Japanese Patent Application No. 02-330664, that is, the resin pavement on the surface of a pavement base resin made of polyurethane. Provides a method for finishing a pavement surface that has a moderately uneven pattern by coating the thixotropic polyurethane resin composition with a roller before the product is completely cured, and provides a highly durable and high-performance pavement surface. doing. The present inventors have studied to further enhance and develop the invention of Japanese Patent Application No. 02-330664. That is, by using the thixotropic polyurethane resin composition with a comb-like squeegee and further using a grooved roller and a mastic roller, the surface irregularities can be adjusted to be small, large and shallow, and at the same time, the construction is easy, and the thixotropic polyurethane resin composition adhered to the roller. We found that loss of goods can be reduced.

Further, by using the present invention, it is possible to reflect light due to the gloss of the surface of the urethane resin pavement,
Or, it is found that it can solve the disadvantage that this phenomenon is remarkable when slippery, especially when wet with water,
The present invention has been reached. That is, the present invention is as follows. (1) A polyurethane resin composition modified by adding a thixotropic agent and, if necessary, a polar solvent and / or polyethylene glycol, an inorganic filler and other auxiliaries, is applied to the base resin surface of the elastic pavement. Using a plurality of comb squeegees having different comb sizes to obtain a surface having irregularities. (2) A polyurethane resin composition modified by adding a thixotropic agent and, if necessary, a polar solvent and / or polyethylene glycol, an inorganic filler and other auxiliaries, is applied to the base resin surface of the elastic pavement. Using a comb-like squeegee and a grooved roller to obtain a surface having irregularities. (3) A method for finishing a resin pavement surface, characterized by using a mastic roller on the uneven surface finished by the method described in (1) or (2) to make the surface more complicated. (4) The method for finishing a resin pavement surface according to (1) or (2), wherein the material of the base resin of the elastic pavement is based on a polyurethane resin. (5) The method for finishing a resin pavement surface according to (1) or (2), wherein the thixotropic agent is ultrafine silica having an average particle diameter of 30 μm or less and a specific surface area of 100 m ² / g or more by a BET method.

[0006] The object of the present invention is as described above,
In order to further develop and reinforce the invention of No. 02-330664, the thixotropic polyurethane resin composition is processed with a comb squeegee, grooved roller and mastic roller to adjust the surface irregularities to large, small and shallow, to improve durability. It is an object of the present invention to provide an economical resin pavement surface finishing method capable of providing an abundant pavement surface and at the same time facilitating construction and reducing loss of the thixotropic polyurethane resin composition adhering to the roller. The method of the present invention, after applying a base resin on a base such as asphalt concrete according to a known preferably a pavement method using polyurethane, after that, based on polyurethane, a specific thixotropic agent, further if necessary , A polar solvent, a material mixed with a filler and other auxiliaries are applied, and the size of the comb-shaped squeegee is
Choosing a shape and combining these, various combinations of smoothing directions, etc., and in some cases, using a grooved roller, or even a mastic roller, to make a complex pavement surface, a conventional mastic roller, etc. The inventor has developed a technique for a method of finishing a resin pavement surface that can arbitrarily adjust the point where the formation of a surface pattern is insufficient with only a plastering roller according to the purpose of use.

The outline of an example of a comb squeegee used in the present invention is as shown in FIGS. 1 is a side view, FIG. 2 is a plan view thereof, FIG. 3 is a front view thereof, and FIG. 4 is a partial sectional side view thereof. 1 to 4, reference numeral 1 denotes a comb squeegee,
Reference numeral 2 denotes a draw bar, 3 denotes a mounting hole, and 4 denotes a comb. The drawbar may be at any angle as shown in FIGS. 1 and 4 (indicated by dotted lines). 2 to 4 (hereinafter, the unit is mm), usually a: 310, b: 20 to 35, c: 1.2 to 5,
d: 3 to 5 (hereinafter 3 mm squeegee is 3 mm,
5mm thing is called 5mm comb squeegee etc.), e: Normal
90 degrees, the length of the handle of the drawbar shall be 1000-1500. The material is wood,
Aluminum, resin (polypropylene, polyethylene,
Teflon, etc.), stainless steel and the like, but stainless steel is preferred.

The outline of an example of the grooved roller used in the present invention is as shown in FIGS. 5 is a side view, FIG. 6 is a plan view thereof, FIG. 7 is a partial cross-sectional front view of a cylindrical portion of the grooved roller, FIG. 8 is a cross-sectional view of the EE portion thereof, and FIG. FIG. 10 is a plan view (here, arrows indicate the leveling direction) after leveling by the above-described tapered grooved roller. Figure 5
In FIG. 10, 5 is a cylindrical portion of the grooved roller, 6 is a pull rod for mounting the cylindrical portion 5 of the grooved roller, 7 is a hole connecting the cylindrical portion 5 and the pull rod 6, 8 is a groove peak, 9 Is a groove valley. 5 to 10 (hereinafter, the unit is mm), usually f: 9, g: 3, h: 6, i: 63φ, j: 200 to 1250,
k: 28φ, the length of the handle of the drawbar shall be 1000-1500. Further, the taper of the grooved roller in FIG. 9 is appropriately tapered depending on the place of use. The material is preferably polypropylene, polyethylene, Teflon or another resin.

The mastic roller used in the present invention has a shape in which the cylindrical portion of the grooved roller is replaced with that described below. The size of the cylindrical part of the mastic roller is usually 30 to 150φ, the length is 150 to 1500, and the length of the handle of the draw bar is 1000 to 1500. The material of the cylindrical portion of the mastic roller, that is, the portion in contact with the thixotropic polyurethane resin composition is formed by foaming and processing a polyurethane resin, a vinyl acetate resin, or other plastics, or a metal net made of metal (stainless steel, brass, aluminum, etc.). And a skeleton foam obtained by foaming a polyurethane resin and processing the foamed polyurethane resin. The size of the holes in the surface of these cylindrical portions is 2 to 20 mesh, preferably 4 to 10 mesh. It is needless to say that the dimensions described above are only examples.

[0010] Except when using a large straddle-type construction machine that lays rails on both sides of the construction surface, when a person averages a long distance over the comb-like squeegee, the meandering and squeegee meander, and the uneven pattern on the pavement surface also meanders. Things are easy to happen. Therefore, for example, the comb-shaped squeegee is flattened in a direction orthogonal to this direction to correct the meandering portion of the uneven pattern. In some cases, FIG.
By using a grooved roller as shown in FIG. 8, a method for easily correcting and finishing the meandering portion has been invented. If the grooved roller is provided with an appropriate taper as shown in FIG. 9, a fan-shaped surface pattern can be formed as shown in FIG. 10, which is a curved part of the track of the athletic stadium and a semicircle of the field. Useful for construction of shaped parts.

Known polyurethane pavement methods include, for example, those described in JP-B-44-022914 and JP-A-48-019643. Generally, a so-called two-pack system, that is, a polyisocyanate is used. Or a component consisting of a prepolymer obtained by preliminarily reacting a part of the isocyanate group of the polyisocyanate with a polyol and a known polyol, a polyamine, a filler, a plasticizer, a catalyst, a pigment, a stabilizer, and the like used in urethane chemistry. Is applied at a normal temperature to a composition having a thickness of 5 to 30 mm on concrete, asphalt concrete, ground-treated asphalt concrete, or the like to which a primer has been applied as necessary. In this case, various foamed elastic bodies other than polyurethane, and other aggregates of rubber may be added.

A one-component system or a solution-type thermoplastic polyurethane compound in which a filler, a plasticizer, a catalyst, a pigment, a stabilizer, and the like are mixed into a prepolymer having an excess of isocyanate groups, and cured with moisture in the air. Emulsion formulations can of course also be used. Construction is performed by batch type manual work, or in case of large area,
It is carried out by a continuous method using a machine as described in JP-A-4. Further, a so-called prefabricated method, in which sheets manufactured in a factory in advance are bonded together on site, can also be used.

As the surface finishing material used in the present invention,
Mainly based on the known polyurethane material system described above.
With an average particle size of 30μ (micron) or less and BET method
100m^Two/ g or more
If necessary, polar solvent and / or polyethylene glycol
Or its derivatives, inorganic fillers, and other auxiliaries
Is used. Average particle size of 30 microns or less and
Specific surface area 100m^Two/ g or more of ultra-fine silica
Commercially available Ezirol, Carbosil, Hi-Seal, Ultra
Seal, carplex, thyroid, nip seal
There are various grades, especially Erogyl # 200,
# 380 is excellent in the effect of imparting thixotropic properties. In addition, super fine particles
Silica is basically SiO_TwoIs the main component
But especially Al _TwoO_Three, TiO_TwoModified products containing components such as
And these can also be used. Ultrafine silica
The blending amount is usually based on polyurethane material system
0.5 to 10% by weight based on the solid content
is there.

In order to increase the effect of the unevenness, it is sufficient to increase the compounding amount. However, if the amount is increased more than necessary, the physical properties are reduced.
Not preferred. In the case where the polyurethane material system contains a volatile component such as a solvent, the solid content means the remaining component after subtracting the volatile component. As polar solvents, dimethyl sulfoxide, dimethylformamide,
One or a mixture of two or more such as dimethylacetamide is used. These can be used by mixing with a nonpolar solvent such as toluene, xylene, and hexane. A suitable amount of polar solvent is usually 0.5 to 10% by weight relative to the solids content of the main polyurethane material system. Usually, a non-polar solvent is also used, but its amount is suitably 1 to 50% by weight. Polyethylene glycol includes any etherified or esterified derivative having an average molecular weight of 100 to 20,000. The compounding amount is suitably 0.01 to 50% by weight based on the solid content in the polyurethane material system.

It is preferable to use the coating material as soon as possible after blending. As a method of pavement finishing, a combination of comb squeegees having different comb sizes, a combination of comb squeegees and grooved rollers, and a mastic roller thereon are used. Specifically, the method of pavement finishing is as follows. In the first finishing method, first, the height of the target unevenness is determined by the size of the comb of the comb squeegee (FIG. 2).
Decide in d). Then, place an appropriate amount of thixotropic polyurethane material on the surface of the polyurethane base resin so that it can be evenly and evenly distributed with a comb-like squeegee, and then straighten it with the first comb-like squeegee determined according to the target height of unevenness. Then, make ridges of thixotropic polyurethane. The resulting ridges are then straightened at least 30 degrees, preferably orthogonally, using a comb squeegee that is larger than the first comb squeegee. As a result, an uneven pavement surface having a lattice-like and substantially uniform thickness is obtained. The comb squeegee can be drawn by adjusting the direction of the comb to be used in ascending order from the smallest to the largest and adjusting the direction of the comb and / or selecting a combination of the combs to adjust the large and small number of irregularities on the pavement surface.

In the second finishing method, first, the height of the target unevenness is determined by the size of the comb of the comb squeegee. Then, place an appropriate amount of thixotropic polyurethane material on the surface of the polyurethane base resin so that it can be evenly and evenly distributed with a comb-like squeegee, and then straighten it with the first comb-like squeegee determined according to the target height of unevenness. Then, make ridges of thixotropic polyurethane. The ridges are then straightened at least 30 degrees, preferably perpendicular to the ridges, with grooved rollers. As a result, an uneven pavement surface having a lattice-like and substantially uniform thickness is obtained. In the third finishing method, a mastic roller is further rolled on the surface obtained by the first finishing method or the second finishing method. As a result, an uneven pavement surface having a substantially uniform thickness in a complicated folded shape is obtained. The shape of the uneven pattern on the surface finish of the outdoor sports stadium is particularly good for the track of athletic stadiums, taking into account running performance, maintenance and aesthetics, taking into account shock absorption, cushioning, resilience, moderate slip resistance From the point of view, it should be decided comprehensively, and since the appearance of polyurethane elastic all-weather pavement, topping finish by chipping has been the mainstream, but recently, from these points, athletes have less kinetic energy loss when running It is changing in the direction of adopting a concavo-convex pattern finish called emboss finish which can obtain a monolithic surface.

A coating amount of the material of 500 to 3 kg per 1 m ² as a solid content is usually sufficient. However, the solid content here refers to the solid content in the coating material, and is the sum of the solid content in the polyurethane material system and the ultrafine silica and inorganic filler. The timing of application
From the point of adhesion to the base resin, it is preferable to set a relatively early point of about 6 hours to 100 hours after application of the base resin. However, when the stickiness has already been eliminated, various solvents and primers are applied to the base resin. If it is applied, or if it is applied after grinding the surface of the underlying resin to make it uneven, then it will adhere completely.
In addition, the base resin is not necessarily limited to polyurethane,
Other resins such as epoxy, acrylic, SBR, and vinyl chloride may be used, but polyurethane is most preferable in practical use. As a method of construction, a method of paving and finishing at the site after construction of the base resin is usually used, but a so-called prefabrication method of paving and finishing the surface after bonding the base resin sheet finished at the factory at the site is also possible.

According to the present invention, a material in which a filler and a solvent having a special thixotropic effect are blended with a conventionally known polyurethane material system is combed on the surface of the base resin, and the mesh size of the grooved roller is adjusted. , Choosing the shape, and also mastic roller finishing and their combination,
By combining various smoothing directions and the like, it is a finishing method that can arbitrarily adjust the degree of unevenness, the degree of shallowness, and the like, as compared with a method of finishing using only a conventional mastic roller or other plastering rollers. In this finishing method, since the working width is wide, it is possible to use a polyurethane resin having an arbitrary thixotropic property and viscosity. Therefore, it is possible to give a concavo-convex pattern of a desired size according to a target, and furthermore, it is integrated with the base. It is a monolithic pavement surface that has been converted and there is no fear of falling off like chips. In order to further reduce the light reflectivity of the polyurethane pavement surface, it is also effective to apply a matte paint such as urethane or acrylic to the surface.

[0019]

The method of the present invention will be described below with reference to comparative examples and examples. The construction was carried out using plaster clogs with spikes. Comparative Example 1 43.7 Polyoxypropylene glycol having an average molecular weight of 2,000 was used as the component A of the stock solution system for polyurethane elastic pavement.
kg and 43.7 kg of a glycerin-based polyoxypropylene triol having an average molecular weight of 4,000 and an excess of tolylene diisocyanate (2,4-form / 2,6-form =
80/20) and 12.7 kg were reacted at 80 ° C. for 5 hours by a conventional method to produce a prepolymer having a terminal isocyanate group content of 2.9% by weight. Further, 44 kg of a liquid polyamine containing methylenebis (o-chloroaniline) as a B component, a toner 6
Kg, 44 kg of heavy calcium carbonate, 3 kg of a liquid additive (dioctyl phthalate), 2 kg of a lead octylate catalyst, and 1 kg of a weathering stabilizer (Nocrack NBC) were prepared. The above components A and B are mixed by stirring at a weight ratio of 1: 1.
This was poured on an asphalt concrete base which had been subjected to a base treatment with a mixture of MBR latex, cement, silica sand and water (polymer cement paste) in advance, and paved to a thickness of 12 mm. The pot life was about 50 minutes. After about 20 hours, when the surface of the base resin is still slightly sticky, the component A 100 kg and the component B
A suitable amount of the thixotropic polyurethane resin composition obtained by stirring and mixing 100 kg, 5 kg of Ezilol # 200, 2 kg of dimethylacetamide and 10 kg of toluene is placed in a comb squeegee so as to make it evenly uniform, and then a 3 mm comb squeegee (FIG. 1 to
Using FIG. 4), the polyurethane resin was leveled in a certain direction to form a ridge of a polyurethane resin having a height of 3 mm. The application amount was about 1300 g / m ² . Next, the 3 mm comb squeegee was drawn in a direction perpendicular to the ridge. Then, the ridges made earlier disappeared, and the ridges of the newly drawn squeegee remained, and the attempt to make the surface uneven vertically and horizontally failed.

Example 1 An appropriate amount of the thixotropic polyurethane resin composition prepared in the same manner as in Comparative Example 1 was evenly spread on an elastic polyurethane pavement substrate constructed in the same manner as in Comparative Example 1 by means of a comb-like squeegee. First, the material was leveled in the longitudinal direction using a 3 mm comb squeegee. Thereafter, using a 5 mm comb squeegee, the sheet was pulled in a direction perpendicular to the ridge formed by the 3 mm comb squeegee. The coating amount at this time was about 1300 g / m ² . As a result, a number of small irregularities appeared substantially in a lattice pattern on the surface, and the irregularities substantially maintained their shapes due to thixotropic properties of the polyurethane resin composition, and were cured after about 5 hours. These fine irregularities reflect light irregularly outdoors, reduce gloss and reduce glare, make pavement surfaces less slippery, and have the effect of reducing slipperiness especially when wet with water. It was suitable for the runway.

Example 2 An appropriate amount of the thixotropic polyurethane resin composition prepared in the same manner as in Comparative Example 1 was uniformly spread on an elastic polyurethane pavement base applied in the same manner as in Comparative Example 1 using a comb squeegee. It was placed first, pulled with a 3 mm comb squeegee, perpendicularly drawn with a 4 mm comb squeegee, and further pulled perpendicularly with a 5 mm comb squeegee, to obtain a surface having a complicated uneven pattern. The coating amount at this time was about 1200 g / m ² .

Example 3 An appropriate amount of the thixotropic polyurethane resin composition prepared in the same manner as in Comparative Example 1 was uniformly spread on an elastic polyurethane pavement base constructed in the same manner as in Comparative Example 1 by means of a comb-like squeegee. First, it was leveled with a 3 mm comb squeegee to form a ridge of the polyurethane resin composition. Then, a grooved roller (f = 9, g = 3, h
= 6, FIGS. 5 to 8) were rolled. The pattern on the surface obtained by rolling the grooved roller was neat in a grid pattern. The coating amount at this time was about 1300 g / m ² .

Examples 4 to 6 Immediately after formation, the pavement surfaces formed in Examples 1 to 3 were rolled with a mastic roller (polyurethane skeleton foam, hole size 5 mesh Otsuka brush manufactured by KK), and the surfaces were rolled. Finished. The results are shown in Example 4 respectively.
To 6. As a result, a more complicated pattern appeared on the uneven surface described in Examples 1 to 3, and the effect of further reducing the gloss of the polyurethane pavement surface and further reducing the slipperiness of the surface could be obtained. This also makes the pattern disturbance due to uneven squeegee pulling less noticeable and improves the design effect. Table 1 summarizes the results of Comparative Examples and Examples.

[0024]

[Table 1]

[0025]

According to the method for finishing a resin pavement surface of the present invention, the construction method is simple, the degree of unevenness of the finished surface can be adjusted, and the degree of depth can be adjusted. An integrated pavement surface is obtained. This pavement surface, combined with the characteristics of the lower layer elastic pavement resin, has a very good running feeling, stability without slippage, record improvement, durable athletic ground, track and field running track, jogging track or A golf course path can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a comb squeegee.

FIG. 2 is a plan view of a comb squeegee.

FIG. 3 is a front view of a comb squeegee.

FIG. 4 is a partial cross-sectional side view of a comb squeegee.

FIG. 5 is a side view of a grooved roller.

FIG. 6 is a plan view of a grooved roller.

FIG. 7 is a partially sectional front view of a cylindrical portion of the grooved roller.

FIG. 8 is a sectional view taken along the line EE of FIG. 7;

FIG. 9 is a side view of a cylindrical portion of a tapered grooved roller.

FIG. 10 is a plan view after leveling when leveling with a tapered grooved roller.

[Description of Signs] 1 Comb Squeegee 2 Comb Squeegee Pull Bar 3 Mounting Hole 4 Comb 5 Groove Roller Cylindrical Port 6 Groove Roller Cylindrical Bar 7 Pull Hole for Connecting Cylindrical Portion and Pull Rod 8 Groove Mountain 9 Groove Valley

Continuation of front page (72) Inventor Yoshiharu Ishibashi 1541 Yabe-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture (56) References JP-A-63-255403 (JP, A) JP-A-2-27003 (JP, A) JP-A-51-20818 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E01C 13/00 E01C 7/35

Claims (5)

(57) [Claims] 1. A polyurethane resin composition modified by adding a thixotropic agent and, if necessary, a polar solvent and / or polyethylene glycol, an inorganic filler and other auxiliaries, to a base resin surface of an elastic pavement. A method of finishing a resin pavement surface, characterized in that the surface is made uneven by using a plurality of comb squeegees having different comb sizes. 2. A polyurethane resin composition modified by adding a thixotropic agent and, if necessary, a polar solvent and / or polyethylene glycol, an inorganic filler, and other auxiliaries, to a base resin surface of an elastic pavement. A method of finishing a resin pavement surface, wherein the surface is made uneven by using a comb squeegee and a grooved roller. 3. A method for finishing a resin pavement surface, wherein the surface having irregularities finished by the method according to claim 1 or 2 is further complicated by using a mastic roller. 4. The method for finishing a resin pavement surface according to claim 1, wherein the material of the base resin of the elastic pavement is based on a polyurethane resin. 5. The method for finishing a resin pavement surface according to claim 1, wherein the thixotropic agent is ultrafine silica having an average particle diameter of 30 μm or less and a specific surface area of 100 m ² / g or more by a BET method. .