JPH0673703A - Structural body made of pulverized rubber granulated matter - Google Patents

Abstract

PURPOSE:To heighten the strength by a method wherein granulated matters made by pulverizing rubber that is mainly composed of at least one of BR, NBR, EPDM, SBR and NR, alphabeta unsaturated fatty acid metallic salt, organic peroxide and filler are combined with resin binder. CONSTITUTION:Rubber that is mainly composed of at least one of BR, NBR, EPDM, SBR and NR, alphabeta unsaturated fatty acid metallic salt, organic peroxide and filler and is usable, for instance, for making golf balls is pulverized, and granulated matters 2 in 0.05-30.00mm grain sizes are formed. Then, the granulated matters 2 are mixed with resin binder made of such materials as urethane resin, acrylic resin, epoxy resin and vinyl acetate resin, with air holes 4 provided appropriately, so that the air and water permeabilities can be maintained. Then, a pavement block 1 is made by molding the mixed material into a block shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure used as a paving material or a flooring material, which is formed by solidifying a granular material with a resin binder, and more specifically, a granular material obtained by crushing rubber is solidified with a resin binder. The present invention relates to a rubber crushed granular material structure constituted by the above.

[0002]

2. Description of the Related Art Rubber, foam rubber, natural stone, various resin waste materials such as urethane resin and epoxy resin, sponges, cork chips, wood chips, ceramic particles, etc. are hardened with heat-curing or moisture-curing resin such as urethane resin or epoxy resin. Paving materials and flooring materials have been widely used. Such paving materials and floor materials are constructed by molding a mixture of aggregate and resin into blocks or sheets by hot pressing and laying them on site. In particular, rubber blocks made by curing waste tire rubber chips with a one-component moisture-curing urethane resin after heat molding and curing are required at locations such as golf course paths where elasticity is required, as well as safety at parks and schools. It is widely used in places where it is used.

[0003]

As such a structure, it is most preferable to use rubber chips obtained by crushing waste tires as granules, and form into blocks or sheets by hot press molding together with a binder such as urethane resin. It is widely practiced. However, since a large amount of additives are kneaded into the waste tire rubber chips for the purpose of preventing aging, etc., the adhesiveness with the binder is poor, and these additives exude even after molding and cause discoloration or contamination. turn into. In addition, the raw material for waste tire rubber chips is for trucks,
Since it is a mixture of various tires for passenger cars, there is a variation in quality, and there is a drawback that the required strength is not sufficient, especially when a certain level of strength is required such as a paving block. Further, pavement materials and floor materials are required to have various colors, but since waste tire rubber chips are black, a large amount of pigment is required for coloring. Further, as a factor that requires a large amount of pigment, it is necessary to prevent discoloration due to exudation of additives and the like kneaded into the waste tire rubber chips.

As a result of various studies on various particulate materials which replace the waste tire rubber chips having the above-mentioned drawbacks, attention is paid to a golf ball which is currently disposed of in landfill. A detailed analysis and examination of the golf ball shows that the golf ball is BR,
Rubber such as NBR, EPDM, SBR, NR, etc., with αβ unsaturated fatty acid metal salt, organic peroxide, and fillers such as zinc white and calcium carbide as the main components, all of which are uniform in material, golf It was found that a relatively uniform quality can be obtained because there is little difference in composition depending on the type of ball. It is also found that golf balls often have a white color and are easy to be colored after that, and when coloring to another color, the amount of the pigment used is small, and the adhesiveness with a resin binder such as a urethane resin is good. It was

Therefore, an object of the present invention is to provide BR, NBR,
At least one of EPDM, SBR and NR, αβ unsaturated fatty acid metal salt, organic peroxide, and rubber containing a filler as a main component are pulverized to form a granular material, which has uniform quality and also has abrasion resistance. An object is to provide an excellent rubber ground granule structure.

[0006]

The rubber crushed granular material structure of the present invention mainly comprises at least one of BR, NBR, EPDM, SBR and NR, an αβ unsaturated fatty acid metal salt, an organic peroxide and a filler. It is composed of a granular material obtained by crushing rubber as a component and a resin binder sufficient to bond the granular material.

In this case, the particle size of the granular material is 0.05 to 3
It is preferably 0.00 mm.

[0008]

[Advantage] By using the granular material obtained by crushing the rubber having the above-mentioned constitution, the adhesiveness with the resin binder is improved,
It is possible to give the structure a strong strength. Also, since the granular material is somewhat harder than conventional rubber chips, it can be easily charged into the mold immediately after mixing with the resin binder, and the completed structure can improve wear resistance and high resilience. It is possible to obtain a rubber-milled granular structure which is elastic and elastic.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the case where the rubber crushed granular material structure is used as a pavement block is taken as an example.

The pavement block 1 is made of BR, NBR, EPD.
Granules obtained by pulverizing rubber such as golf ball having at least one of M, SBR and NR, αβ unsaturated fatty acid metal salt, organic peroxide and filler as main components to a grain size of 0.05 to 30.00 mm. 2 is mixed with urethane resin, acrylic resin, epoxy resin, vinyl acetate resin, or other resin binder 3 to form ventilation holes 4 appropriately so as to have air permeability and water permeability, and is blocked by heat press molding or the like. It is molded into a shape. A plurality of such paving blocks 1 may be laid on the foundation 5 at the construction site to form a paving road.

The rubber particles 2 as described above have good adhesiveness with the resin binder 3 and can have high strength, and are slightly harder than the tire rubber, so that they are mixed with the resin binder 3. There was little stickiness immediately after that, and the heating press could be easily charged into the mold.
In addition, the ventilation holes 4 can be formed by adjusting the mixing ratio of the resin binder 3, and accordingly, appropriate water permeability, water absorption, and water retention can be provided, which is also suitable as an outdoor paving block. Is. Further, it is possible to use a waste golf ball, and it becomes possible to effectively reuse such a golf ball that has been disposed of by landfill.

Next, as an experimental example, a granular material 2 was crushed to 1 to 3 mm by a test crusher to obtain golf ball chips, and as a comparative example, it was marketed by Sumitomo Rubber Industries, Ltd. under the trade name "GO-R13". EPDM
Prepare a rubber chip similarly crushed to 1 to 3 mm, and use a resin binder 3 made of Sumitomo Rubber Industries, Ltd. under the trade name "Grip Coat C-928", an MDI-based one-component moisture-curing urethane resin. Then, these two kinds of granular materials 2 were respectively combined to prepare two samples, a specific example and a comparative example. In addition, a golf ball,
The specific gravities of the EPDM rubber chip and the urethane resin are 1.0, 1.3 and 1.0, respectively. Each sample was heated at a heating temperature of 150 ° C. for 15 minutes to have a thickness of 10 mm, a filling rate of 80%, and a porosity of 20%. Then, these specific examples and comparative examples were tested for tensile strength, wear, repulsion, impact acceleration, walking feeling, and the like.

The tensile strength test was conducted according to JIS standard K6301, and the abrasion test was conducted according to JIS standard A1453. In this Taber abrasion test, an abrasion wheel of H22 was used, and 1000g
The wear depth after 1,000 rounds at f, 60 r / min was measured. This is because the change in weight cannot be measured because it is porous. Steel ball (SB) for repulsion test
The rebound height (cm) when the golf ball (GB) was dropped from a height of 1 m was measured. In addition, the impact acceleration test measures the impact (Gmax) at the time of fall based on the JIS standard A6519 type impact acceleration test at the time of fall, and for the walking feeling test, 100 people walk on them and walk. When a questionnaire of good and bad feelings was taken and 50% or more was answered, it was rated as ◯ and 50% or less was rated as x. The results are shown in Table 1.

[0014]

[Table 1] From Table 1, it can be understood that the specific examples are more than twice as excellent in strength as the comparative examples, and are also effective in the abrasion, the coefficient of restitution, the impact test and the feeling of walking. Also,
Most golf balls have a white color, and therefore a small amount of pigment is sufficient to give a desired color.

In the above-mentioned embodiment, the pavement block 1 is composed of only the granular material 2 and the resin binder 3. However, when the pavement block 1 needs a considerable elasticity, rubber chips or the like having high elasticity may be mixed. . Also, paving block 1
By interposing a rubber chip layer between the base and the base 5, a block having a further cushioning function can be obtained. Furthermore, by stacking natural stone and concrete blocks, paving blocks 1
It is also possible to pave with a simple construction method that only lays down.

The above-mentioned structure can also be used as a floor or a floor material for indoor gymnasiums and entrances of general houses.

[0017]

Industrial Applicability As described above, the rubber pulverized granular material structure of the present invention mainly comprises at least one of BR, NBR, EPDM, SBR and NR, αβ unsaturated fatty acid metal salt, organic peroxide and a filler. Since it is composed of granular material obtained by crushing rubber as a component and a resin binder sufficient to bond the granular material, the adhesiveness between the granular material and the resin binder is improved, and the structure has strong strength. be able to. Also,
Since the granular material is slightly harder than conventional rubber chips, it can be easily charged into the mold immediately after mixing with the resin binder, and the finished structure can improve wear resistance, high resilience and elasticity. A flexible structure can be provided.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view schematically showing an enlarged part of an embodiment of the present invention.

[Explanation of symbols]

 1 Pavement block 2 Granular material 3 Resin binder 4 Vent

Claims (2)

[Claims] 1. BR, NBR, EPDM, SBR, NR
A granular material obtained by pulverizing rubber having at least one of the above, an αβ unsaturated fatty acid metal salt, an organic peroxide and a filler as a main component,
A rubber pulverized granular material structure comprising a resin binder sufficient for binding the granular materials. 2. The particle size of the granular material is 0.05 to 30.0.
The rubber crushed granular material structure according to claim 1, wherein the structure is 0 mm.