JP2000043063A - Elastic rubber plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic rubber plate having anti-slip effect, good in drainage and having good elasticity. SOLUTION: In an elastic rubber plate constituted by integrating a rubber compsn. and a polyurethane resin, the rubber compsn. comprises a granular powder staple fiber reinforced rubber obtained by grinding a staple fiber reinforced rubber wherein stable fibers with a length of 3 mm or less and a vulcanized rubber are bonded, a fiber like staple fiber reinforced rubber, a mixture of them or a mixture of them and a powder rubber comprising a rubber other than the staple fiber reinforced rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic rubber plate which covers a surface layer of a road surface to impart durability and to improve drainage.

[0002]

2. Description of the Related Art Surface members, such as golf courses, parks, and poolsides, which have good drainage and have a sliding effect are used for pavement. Above all, an elastic rubber plate is widely used to give an effect of giving elasticity and making it easy to walk. As such an elastic rubber plate,
Conventionally, a rubber molded product has been stuck or a urethane elastomer has been applied and cured.

[0003] For such applications, those having a small compressive stress and sufficient elasticity are particularly preferred. Japanese Patent Application Laid-Open No. 52-134235 discloses a technique in which an elastic body such as rubber, polyurethane or the like is powdered or granulated and cured with a curable resin. Insufficient strength and insufficient elasticity of the granular rubber can be reinforced to some extent by mixing fiber rubber. However, it did not reach sufficient elasticity.

Japanese Patent Publication No. 5-9563 discloses a method in which a powdered solid rubber aggregate of a solid rubber-based elastic material and a powdered foamed rubber aggregate of a foamed rubber-based elastic material are mixed, and a polybutadiene-based polyol is further added to the mixture. A technique is disclosed in which a polyurethane prepolymer is added as a curable resin to a mixture dispersed and mixed, and the mixture is integrally bonded.
In this technique, although appropriate elasticity can be obtained by such a method, it has not been possible to obtain additional effects such as drainage and slippage.

[0005] Japanese Patent Publication No. 54-33654 discloses a powder rubber composite in which a mixture of a granular powder rubber and a fibrous powder rubber is combined with a binder of a liquid curable rubber, urethane, plastic or the like and integrated. It has been disclosed. This product is designed to reduce obstacles to human joints and knees, and take physical properties such as flexibility, elasticity and strength, flatness and ease of maintenance into consideration. The effect was not considered.

Therefore, it has sufficient durability against damage and abrasion, has sufficient strength and toughness as an elastic rubber plate, and has a low surface friction coefficient even when wet with rain. There has been a demand for a material having a wide range of functions as a pavement material such as not to be used.

[0007]

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to provide an elastic rubber plate having a sliding effect, good drainage, and good elasticity. is there.

[0008]

SUMMARY OF THE INVENTION The present invention is an elastic rubber plate obtained by integrating a rubber composition and a polyurethane resin, wherein the rubber composition comprises a short fiber having a length of 3 mm or less, a vulcanized rubber, Granular powder short fiber reinforced rubber obtained by pulverizing the short fiber reinforced rubber combined with, a fibrous short fiber reinforced rubber or a mixture thereof, or a powdered rubber composed of a rubber other than the short fiber reinforced rubber and these. An elastic rubber plate comprising a mixture.
Hereinafter, the present invention will be described in detail.

The elastic rubber plate of the present invention is an elastic rubber plate used so as to cover the upper surface of the road surface. The above road surface is comfortable for humans to walk and run,
It is preferable to have a suitable elasticity, for which purpose the surface is covered with an elastic plate. An elastic rubber plate is used for this purpose. The thickness of the elastic rubber plate can be appropriately determined according to the purpose of use, but is usually set to 0.1.
5-5 cm. If it is too thick, the cost will increase as compared with the effect, and if it is too thin, the durability will deteriorate.

[0010] The elastic rubber plate of the present invention is obtained by integrating a rubber composition and a polyurethane resin. The polyurethane resin is used as a binder. The polyurethane resin is not particularly limited, but a resin obtained by blending a reactive liquid rubber with a polyurethane prepolymer having a terminal NCO group as a liquid resin is preferable.

The reactive liquid rubber is not particularly restricted but includes, for example, butadiene, chloroprene, isoprene,
Examples thereof include diene-based liquid rubbers such as 1,3-pentadiene and cyclopentadiene having a terminal OH group.

The polyurethane prepolymer having a terminal NCO group is not particularly restricted but includes, for example, isocyanate component (a) and one or two kinds of polyether polyol, polyester polyol, polybutadiene polyol, liquid polybutadiene, liquid polypropylene and the like. It is a polyurethane prepolymer obtained by reacting the above polyol component (b).

The isocyanate component (a) is not particularly restricted but includes, for example, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 2,4 /
2,6 = 65/35 (wt) tolylene diisocyanate, 2,4 / 2,6 = 80/20 (wt) tolylene diisocyanate, 4,4′-diphenylmethane diisocyanate, hexamethylene diisocyanate, phenylene diisocyanate, 1,5 -Naphthalene diisocyanate, meta-xylylene diisocyanate, water-added tolylene diisocyanate, water-added 4,4'-diphenylmethane diisocyanate, crude tolylene diisocyanate, polymethylene polyphenyl isocyanate and the like.

The isocyanate component (a) may be used alone or in combination of two or more. In addition, the isocyanate component (a) alone or as a mixture of terminal isocyanate group-containing prepolymers obtained by reacting the isocyanate with the polyether polyol or the polyester polyol can also be used.

The above polyether polyol is not particularly restricted but includes, for example, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, Pentyl glycol, bisphenol A, trimethylolethane, trimethylolpropane, glycerin, those obtained by polymerizing or copolymerizing a polyol monomer such as sorbitol, or the above polyol monomer and ethylenediamine, urea,
Monomethyldiethanolamine, monoethyldiethanolamine and other amine monomers, ethylene oxide, propylene oxide, butylene oxide, alkylene oxides such as styrene oxide alone or copolymerized, further, a mixture of these polymers And the like.

The polyester polyol is not particularly restricted but includes, for example, polybasic acids such as maleic acid, fumaric acid, adipic acid and phthalic acid, alone or in admixture with ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, Examples thereof include polyester polyols having a terminal OH group obtained by reaction with a polyhydric alcohol such as 3-butanediol, 1,4-butanediol, and 1,6-hexanediol alone or in a mixture.

The catalyst for preparing the above polyurethane resin is not particularly limited. For example, triethylamine,
Triethylenediamine, N-methylmorpholine, N-ethylmorpholine, N, N′-dimethylalkylamine,
N, N'-diethylalkylamine, N, N, N ',
Tertiary amine catalysts such as N′-tetramethylpropyleneamine, hexamethylenetetramine, alone or in mixture;
Cobalt naphthenate, copper naphthenate, zinc naphthenate,
Lead naphthenate, zinc octylate, copper octylate, lead octylate, dibutyltin dilaurate, dimethyltin dilaurate, trinormal butyltin acetate, and metal compound-based catalysts such as cupric chloride may be used alone or in combination. it can.

For the elastic rubber plate of the present invention, a rubber composition is used as an integral part of the above-mentioned polyurethane resin as a binder. The rubber composition is a granular powdered short fiber reinforced rubber, a fibrous short fiber reinforced rubber, or a mixture thereof obtained by crushing a short fiber reinforced rubber obtained by combining a short fiber having a length of 3 mm or less and a vulcanized rubber. Or a mixture of these and powdered rubber made of rubber other than short fiber reinforced rubber.

The short fiber reinforced rubber is obtained by combining short fibers having a length of 3 mm or less with a vulcanized rubber.
It is called FRR and is widely used as a material of a power transmission belt such as a polylift belt. The granular powder short fiber reinforced rubber (granular powder SFRR) is obtained by pulverizing SFRR into granules, and may be generated when grinding for producing a power transmission belt such as a polylift belt. The above-mentioned fibrous short fiber reinforced rubber (fibrous SFRR) is obtained by pulverizing SFRR into a fibrous shape, and may be generated when grinding is performed in producing a power transmission belt such as a polylift belt.

The above-mentioned SFRR has an effect of giving a roughness to the surface of the rubber plate, thereby ensuring a slip-stopping effect. The SFRR also has the effect of improving drainage at the same time, and by simultaneously exhibiting these effects, the object of the present invention can be achieved extremely effectively.

The above rubber composition is prepared by mixing the above granular powder SFR
R, the above-mentioned fiber-like SFRR, or a mixture thereof.
Powder rubbers made of rubbers other than R can be mixed and used. It is preferable that the amount of the powder rubber made of a rubber other than the SFRR is 0 to 50% by weight based on the SFRR. If the amount is outside this range, a good anti-slip effect cannot be obtained.

The elastic rubber plate of the present invention may have the entire surface made of the above-mentioned rubber plate, but two types of rubber plates are alternately arranged in stripes in the direction perpendicular to the traveling direction. The elastic rubber plate may be configured such that one of the two types of rubber plates is the rubber plate, and the other is a rubber plate made of only polyurethane resin. it can.

With this configuration, the amount of the SFRR used can be reduced, and the rubber plate of the present invention can be manufactured at lower cost. In this case, the width of the striped rubber plates is preferably 1 to 20 cm. If it is less than 1 cm, there is no point in arranging it in a striped form and it is inexpensive to manufacture. If it is more than 20 cm, it will exceed the size of the human foot, so the effect of slipping when walking or running humans Is diminished. More preferably, 2 to 15 cm, still more preferably, 5 to 1 cm
0 cm.

The elastic rubber plate of the present invention is applied for the purpose of covering a road surface. The elastic rubber plate can be used as a footpath elastic rubber plate for a footpath, which is a dedicated road for humans to walk at golf courses, parks, poolsides, and the like. Since the above-mentioned step rubber path elastic rubber plate can also be used as a pavement material for athletic facilities such as athletics stadiums and gymnasiums, the term "step path" is a concept including these in this specification.

The elastic rubber plate of the present invention can be used not only for step roads, but also for roads for automobiles, general roads, and highways.
Of course, it is also possible to apply for the pavement. In this case, the elastic rubber plate of the present invention is used as an elastic rubber plate for an automobile road.

[0026]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Example 1 20 parts by weight of a polyurethane binder was added to 100 parts by weight of granular powder SFRR, and the mixture was kneaded well. The kneaded material was spread on a steel plate by applying pressure, and cured to form an elastic rubber plate. Was prepared.

Example 2 Granular powder SF was used instead of 100 parts by weight of granular powder SFRR.
An elastic rubber plate was produced in the same manner as in Example 1 except that a mixture of 50 parts by weight of RR and 50 parts by weight of granular powder rubber was used.

Example 3 The kneading material of Example 1 and a polyurethane binder were used in an amount of 15 c.
Alternately at m intervals, pressure was applied to the iron plate to spread it in a sheet shape and cured to produce an elastic rubber plate.

Comparative Example 1 An elastic rubber plate was produced in the same manner as in Example 1, except that 100 parts by weight of granular powder rubber was used instead of 100 parts by weight of granular powder SFRR. Examples 1 to 3 and Comparative Example 1
In the above, the size of the granular powder rubber and granular powder SFRR used for producing the elastic rubber plate is a mixture of 5 to 10 mesh.

Measurement of Physical Properties of Elastic Rubber Plate The elastic rubber plates obtained in Examples 1, 2 and Comparative Example 1
Was measured using the methods described below. Table 1 shows the results
It was shown to.Tensile strength (MPa)  It was measured in accordance with JIS K6251.Elongation at break (%)  It was measured in accordance with JIS K6251.DIN abrasion test (mm ³ )  It was measured according to JIS K 6264.Coefficient of friction  V = 300 mm / using Haydon 14 manufactured by Shinto Kagaku
min, and the contact pressure was measured at p = 0.05 MPa.

[0032]

[Table 1]

The frictional resistance of the elastic rubber plates obtained in Examples 1, 3 and Comparative Example 1 was measured using a portable skid resistance tester in accordance with ASTM F303. The results are shown in Table 2.

[0034]

[Table 2]

As shown in Table 1, Examples 1 and 2
The elastic rubber plate manufactured by the above-mentioned method has improved material strength and improved abrasion resistance. In addition, as shown in Table 2, the elastic rubber plate manufactured in Example 3 had a large frictional resistance on a wet surface, and became less slippery. Further, when an elastic rubber plate for a step path and an elastic rubber plate for a motorway were produced using the elastic rubber plates produced in Examples 1 to 3 and Comparative Example 1,
The drainage of the elastic rubber plates of Examples 1 to 3 was better than that of the elastic rubber plate of Comparative Example 1.

[0036]

Since the elastic rubber plate of the present invention has the above-mentioned structure, it has a sliding effect, is well drained, and has good elasticity.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // B29K 75:00 105: 06 421: 00 (72) Inventor Katsuhiko Hata 3-Meiwadori, Hyogo-ku, Kobe-shi 2-15 F-term in Bando Chemical Co., Ltd. (reference) 2D051 AA02 AA08 AB03 AB04 AB05 AG03 AG13 EA03 EA06 EB06 4F100 AK51A AK51B AL05A AN00A AN02B BA01 BA02 BA03 BA04 BA05 BA06 BA07 BA08 BA10A BA10B BA13 DD11A DD11B GBA DD01A DD11B GBA JD05 JK07A JK16 JL00 YY00 YY00A 4F204 AA31 AA45 AB25 AC01 AC04 AG02 AH43 FB01 FF01

Claims (2)

[Claims] 1. An elastic rubber plate obtained by integrating a rubber composition and a polyurethane resin, wherein the rubber composition is a short fiber reinforced rubber in which short fibers having a length of 3 mm or less and vulcanized rubber are combined. The powdered short fiber reinforced rubber obtained by pulverizing the rubber, a short fiber reinforced rubber or a mixture thereof, or a mixture thereof with a powder rubber composed of a rubber other than the short fiber reinforced rubber. Characteristic elastic rubber plate. 2. The method according to claim 1, wherein the stripes are alternately arranged in a direction perpendicular to the traveling direction.
An elastic rubber plate in which different types of rubber plates are arranged, wherein one of the two types of rubber plates is a rubber plate constituting the elastic rubber plate according to claim 1, and the other one is An elastic rubber plate, which is a rubber plate made of only a polyurethane resin, wherein the width of the rubber plate arranged in a stripe pattern is 1 to 20 cm.