JPH0657702A - Composition for interlocking block - Google Patents

Abstract

PURPOSE:To recycle the waste and use again as lightweight, water permeable and strong products by binding coarsely ground products of cured phenol resin molding material as main base material with thermosetting resin. CONSTITUTION:The cured products produced at the time of molding of phenol resin molding material, etc., are coarsely ground and sifted, and coarse powder is obtained. Two-pack polyurethane resin, etc., is then, added to the coarse powder, and the mixture is molded into a specified shape by a frame under pressure. After curing lightweight interlocking block is obtained. In the above case, the cured thermosetting resin is the cured resin of phenol, epoxy, polyester, polyurethane, melamine, etc., and the grain sizes are preset to be 0.2-15mm diameter. 2-20% by weight of base material of either of epoxy, polyurethane, polyester, phenol resin, etc., is used as a thermosetting resin binder.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a composition for producing a lightweight interlocking block having good water permeability.

[0002]

2. Description of the Related Art Conventionally, an interlocking block has been manufactured by cementing gravel or sand with cement, but it has the drawback of being heavy and impermeable to water. In order to improve the water permeability, it is necessary to roughen the structure, but in that case there is a problem that the strength is reduced.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been studied variously with respect to a composition for obtaining an interlocking block having good water permeability and no problem in strength, and as a result, a cured product of a thermosetting resin as a main substrate has been obtained. It is characterized in that a coarsely crushed product is used.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a composition for interlocking blocks, which is mainly composed of a coarsely pulverized cured thermosetting resin as a main base material and contains a thermosetting resin as a binder, which has good water permeability and is lightweight. It is about things. The thermosetting resin cured product used for the main substrate is not particularly limited,
A cured product of a phenol resin, an epoxy resin, a polyester resin, a polyurethane resin, or a melamine resin is excellent in characteristics. As such a thermosetting resin cured product, for example, a sprue, a runner, etc. generated at the time of molding a molding material can be used, and in that case, what was conventionally a waste can be recycled and become one bird and two birds. The particle size of the coarsely crushed thermosetting resin cured product is 0.2 to 15 mm and is 0.2 m.
If it is smaller than m, clogging is likely to occur and the water permeability is lowered, and if the particle size is coarser than 15 mm, a problem occurs in strength. An epoxy resin, a polyurethane resin, a polyester resin, and a phenol resin are suitable as a binder for bonding the base materials in terms of workability and strength. The addition amount of the binder is 2 to 20% by weight with respect to the base material. If the addition amount is less than 2% by weight, the bonding bridge tends to be insufficient and the absolute strength tends to be low, and the addition amount is more than 20% by weight. Although there is no problem in strength, the formation of continuous pores is hindered and the water permeability tends to decrease. The composition for the interlocking block of the present invention is as described above, but as a method for producing the interlocking block, the composition is charged in a predetermined mold, vibration-hardened, or compacted by pressing, A molded body is obtained by curing at room temperature or by heating. A surface layer for decoration may be provided on the upper surface of the interlocking block during molding. The interlocking block has various shapes such as a quadrangle, a hexagon, and a cross, but is not particularly limited.

[0005]

[Example] Sprue and runner (cured material) generated during molding of a phenolic resin molding material are roughly crushed and sieved.
A coarse powder having a diameter of 0.5 to 10 mm was obtained. To 100 parts by weight of this coarse powder, 8 parts by weight of a two-component polyurethane resin composed of a main agent and a curing agent was added and mixed sufficiently. This mixture 4.
0 kg was uniformly filled in a mold having a length of 30 cm, a width of 15 cm, and a height of 10 cm, and pressure was applied to carry out dead-end molding until the filling depth became 8 cm. This was left at room temperature for 2 hours, then taken out from the mold, and left for a whole day and night to be completely cured. The obtained molded product was lightweight with a density of 1.1 g / cm ³ . Further, the water permeability and the strength were measured, and good results were obtained as described below. Water permeability 1 × 10 ^-2 cm / sec Compressive strength 230 Kgf / cm ²

[0006]

INDUSTRIAL APPLICABILITY The composition of the present invention can produce an interlocking block which is lightweight and has excellent water permeability and strength. Further, as the thermosetting resin cured product, sprue, runner, etc. generated at the time of molding of the molding material can be used, and therefore what was conventionally a waste can be recycled.

Claims (5)

[Claims] 1. A composition for an interlocking block, which comprises a thermosetting resin cured material that is roughly crushed as a main base material and a thermosetting resin as a binder. 2. A thermosetting resin cured product is a phenol resin,
Epoxy resin, polyester resin, polyurethane resin,
A cured product of melamine resin.
The composition as described. 3. The particle size of the thermosetting resin cured product is 0.2 to 1
The composition according to claim 1, which has a diameter of 5 mm. 4. The composition according to claim 1, wherein the thermosetting resin used as the binder is an epoxy resin, a polyurethane resin, a polyester resin or a phenol resin. 5. The amount of the binder is 2 to 20% by weight based on the base material.
The composition according to claim 1, wherein