JPH01174767A - Floor surfacing structure - Google Patents

Abstract

PURPOSE:To aim at the promotion of low-unit cost of production by forming an undercoating layer with an admixture of elastic granular matter and moisture setting type liquid resin and a second coating layer with two-liquid urethane foam resin containing granular matter, then a surface layer with cold setting type liquid resin, respectively. CONSTITUTION:Elastic granular matter of rubber chips or the like and an admixture consisting of moisture setting type polyurethane liquid resin are spread wide on a hard ground 1 after applying a primer at need and thereby an undercoating layer 2 is formed. Urethane foam resin containing optional grain size granular matter is formed as many as more than one time, thereby forming a combined second coating and filling-up layer 3 of the required thickness. Then, cold setting type liquid resin is applied with a proper tool and a surface layer 4 is formed. Uniform film thickness is formed, irregularity adjustment is omitted, while high elasticity and durability are maintained. Consequently, application is facilitated and simultaneously cost is reduced.

Description

[Detailed description of the invention]

[Industrial Application Field 1 The present invention relates to floor pavement structures, including strength, cushioning properties,
This article relates to a seamless floor pavement structure with excellent heat insulation, sound absorption, low cost, and ease of construction. [Conventional technology 1] In the field of coating floor finishing for building floors, urethane flooring materials have excellent physical, chemical, and durability properties, so their use as elastic seamless flooring materials is wide-ranging. Over the years, various products have been commercially available and are being installed. In particular, a floor finish with a large thickness is desirable for gymnasium floors that require elasticity and sound absorption, and for cold regions that require insulation, but urethane-coated flooring is relatively expensive, so various cost-cutting measures and functions are needed. Attempts are being made to improve gender. It is known to install rubber chips on the base and apply non-foaming urethane flooring. For example, elastic particles such as rubber or cork are bonded with foamed polyurethane resin,
An elastic structure has been proposed in which a cushion layer in which the fine voids between the particles are formed by bubbles of polyurethane resin is used as a base layer, and a known two-component polyurethane resin is applied to the surface layer (Japanese Patent Laid-Open No. 57-181264). Publication No.) 6

[Problems to be solved by the invention]

However, according to this method, the underlying substrate does not always have smoothness, and it is naturally difficult to apply the coating film smoothly and with a uniform thickness. In particular, when the foaming ratio of urethane foam is high or when the thickness of one coating is large, the non-uniformity in the thickness of the cured foam film is further expanded than the non-uniformity during coating, forming large irregularities. It is unsuitable as a base layer for urethane-coated floors. Therefore, construction of floor pavement structures using this method lacks versatility and is limited to locations where thickness accuracy is not strictly required. Also, in this case, Fukunil! In this situation, the present inventors have discovered that urethane foam resin containing particulates has the advantage of requiring manual labor for sanding, cleaning, etc., which prolongs the construction period and is disadvantageous in terms of cost. While taking advantage of these excellent features, a uniform film thickness can always be obtained as an intermediate coating layer including the filling of the rubber chip base layer, processes such as unevenness adjustment can be omitted, and a surface layer can be formed on the intermediate coating layer, resulting in high As a result of extensive research into a floor pavement structure that is elastic, durable, easy to construct, and economical, the present invention has been completed. Means for Solving Problem E] That is, the present invention provides a method for forming a mixed material consisting of elastic particles and a moisture-curable liquid resin as a binder on a hard base to an equal thickness so as to form voids inside. A base layer is applied by spreading the base layer, and then an intermediate coating layer and closing layer made of a two-component foamed urethane resin containing granules is applied on the base layer, and then a room temperature curing liquid is applied on the intermediate coating layer and closing layer. The present invention provides a floor pavement structure in which a surface layer is formed by applying a resin. [Structure 1 of the Invention] In the construction of the floor pavement structure of the present invention, first, a mixed material consisting of a large number of elastic particles and a moisture-curable liquid resin as a binder is placed on a hard base so as to form voids inside. Start by spreading it to an equal thickness. Basically, any hard base may be used as long as it can be used to spread the mixed material. That is, ground preparation and primer application are performed as necessary on a hard base such as asphalt concrete or cement concrete. By applying a one-component moisture-curable resin onto a hard base, the resin permeates through the surface of the hard base, increasing the strength of the surface. On top of this, a base layer is formed by spreading a mixed material consisting of a large number of elastic particles and a moisture-curable liquid resin as a binder in an equal thickness so as to form voids inside. However, when a cold-curing liquid resin is applied on the base layer with voids formed in this way, there is a drawback that the cold-curing liquid resin material leaks downward through the voids in the base layer. . According to the present invention, a two-component foamed urethane resin containing granules having a diameter of 0.1111111 or more and a specific gravity of 0°02 to 1.40, preferably a thixotropic foamed urethane resin containing granules, is used as the base material. It is applied on top of the ground layer to fill in the voids in the base layer, and then a room temperature curing liquid resin is applied as a surface layer on this intermediate coat/filling layer. Thus,
The surface layer material is prevented from leaking downward and the voids are ensured to provide an economical and highly resilient floor pavement structure. The configuration of the present invention will be specifically explained below based on the drawings. *First, after applying a primer or the like as necessary on the hard base 1, spread a mixed material consisting of elastic granules and a moisture-curable liquid resin as a binder using a roller, trowel, etc. The base layer 2 is applied thereon, and then an intermediate coating Q/i is applied thereon with a two-component foamed urethane resin containing granules, preferably a thixotropic two-component urethane foam resin.
The EI/closing layer 3 is applied to close the voids in the base layer, and the surface layer 4 is further applied using a room-temperature curing liquid resin according to a known method. As the hard base 1, a known base such as asphalt concrete, cement concrete, mortar, etc. is used. The elastic particles in the base layer 2 have a particle size of 1.5 m.
More than a ship, preferably 1. ! Particulate materials of elastic materials such as rubber chips and cork chips of 1zs-5111 are exemplified. Examples of rubber chips that are elastic granules include:
There are chips of natural rubber, styrene-butadiene rubber, acrylonitrile, polybutanoene rubber, polyisoprene rubber, polychloroprene rubber, polyurethane rubber, etc. and their vulcanized rubbers, but especially tires obtained by crushing waste tires. Scraps are preferred from the economic point of view. In addition, polyurethane is most suitable as the binding material from the point of view of elasticity, and a liquid polyurethane resin that cures at room temperature under humidity of a liquid type system is usually used. The two-component foamed urethane resin containing granules used as the intermediate coating layer and blinding layer 3 is mainly composed of a polyisocyanate component having an incyanate group at the end of the molecule and a polyol component having an active hydrogen at the end of the molecule, and is necessary for foaming. It consists of water or a low boiling point solvent, a foam stabilizer necessary for controlling foaming, and a catalyst necessary for promoting the urethanization reaction. However, because of its fluidity, the granular material-containing foamed urethane resin may flow down onto the hard substrate through the gaps between the elastic granular materials in the base layer, making it unsuitable for use as a closing layer. Therefore, the granular material-containing foamed urethane resin is prepared by adding thixotropy imparting agents such as silica powder, fine clay, surface-treated fine calcium carbonate, inorganic fillers such as asbestos, and fibers such as pulp floc. It is preferable to make it thixotropic. The amount added is preferably 5 to 60 weight percent based on the resin solid content. The pot life of the foamed urethane thus obtained at 25° C. is preferably about 10 to 120 minutes, which is sufficient time for coating work, and cures in about 40 minutes to 8 hours. The specific gravity of this cured product (intermediate coating M and closing layer) is preferably 0.3 to 1°4, particularly preferably 0.3 to 0.4°.
It is adjusted to be 8. A cured product having a specific gravity within this range has excellent cushioning properties, heat insulation properties, sound absorption properties, etc. The granules contained in the above two-component foamed urethane resin preferably have a particle size of 0.111111 or more, particularly 0.111111 or more.
511III1~2-1 with a specific gravity of 0.02~1.4, such as foamed granules of plastic such as polyethylene, polypropylene, polystyrene, ABS, PVC% EVA, rubber, foamed rubber, wood, inorganic, etc. Granular materials can be used. Particle size based on the above material: 0.1
Particles with a specific gravity of 1 or more and a specific gravity of 0.02 to 1.40 may be mixed in advance with either component of the two-component foam urethane resin, or the two-component foam urethane resin may be mixed immediately before construction. It may be added as a third component when doing so. When applying the foamed urethane resin onto the base layer using a metal iron, rake, etc. while maintaining a constant thickness, the granules having a diameter comparable to the thickness to be applied are mixed,
It is preferable to apply the coating while allowing the granular material to function as a ruler for regulating the thickness. In this way, 1 to 3
Since the foamed urethane resin is filled up to about I11 and exhibits a closing effect and an anchoring effect, a tough cushioning layer can be formed in which the base layer and the intermediate coating layer (also serving as a closing layer) are firmly integrated. As mentioned above, by selecting granules having an arbitrary particle size of 0.1 mm or more and mixing them into the foamed urethane resin and coating, the granules with the largest particle size can be mixed with the base layer and the metal iron of the coating tool. It maintains a distance approximately equal to the predetermined thickness between the openings of the coating, and serves as a ruler for defining the thickness, allowing coating to be applied to a uniform thickness without requiring the skill of the coating operator. Since a smooth surface can be easily formed together with the intermediate coating layer in this way, the present invention does not require smoothing treatment such as sanding. The amount of the granules added to the foamed urethane resin is not particularly specified, but is preferably 1 to 30% by weight. The granules may be a single substance or a mixture of composite substances, and if the main component is granules with a diameter approximately equal to the specified coating thickness, granules with a smaller diameter may also be mixed. I can't help it. The coating thickness of the granular material-containing foamed urethane resin can be adjusted to any desired thickness by performing one or more coating steps to a thickness of 1 m or more. The granular material-containing foamed urethane resin can be applied by a conventional coating method using metal iron, a rake, or the like. Next, a known room-temperature curing liquid resin, preferably an elastic urethane flooring material, is coated with a suitable tool on the surface of the closing layer/intermediate coating layer 3 having a foam layer formed by curing the foamed urethane resin. The thickness of the six surface layers, that is, the elastic urethane coated flooring material, in which the surface layer 4 is formed by coating with the urethane resin, can be arbitrarily adjusted and is appropriately selected depending on the application. Normally, 1.5 to 5 ml1 is desirable. Furthermore, a surface finishing layer such as a matte finish can be applied to the surface of the elastic urethane powder depending on the functional purpose. The floor pavement structure of the present invention has excellent cushioning properties, heat insulation properties, sound absorption properties, workability, applicability, durability, shortening of process, etc., so it can be used for gymnasiums that particularly require elastic functions, etc., and for gymnasiums that require insulation properties. It can be used not only for floor finishing of buildings in cold regions, but also for floor finishing of schools, hospitals, apartment complexes, general offices, factories, etc. where conventional urethane coated flooring materials are used. It can be used as a flooring material with heat insulation properties, sound insulation properties, etc. Next, examples will be shown, but the present invention is not limited to these examples only. Example 1 Smooth A moisture-curing urethane resin (product name: DIC Primer U: manufactured by Dainippon Ink & Chemicals Co., Ltd.) is used as a primer on a concrete base, and -0 per square meter is applied.
．． It was applied using a 15 kg iron trowel and dried. On top of this, 400 parts of waste tire rubber chips (particle size 2 to 31) and 100 parts of a binder (trade name: Bandex TP-1139, manufactured by Dainippon Ink and Chemicals Co., Ltd.) were kneaded in a mixer, and the thickness 1
It was spread to a thickness of 5 mm and rolled with iron rollers. Then, after 24 hours, 10% by weight was added to a two-component foamed urethane resin with a pot life of 30 minutes at 20°C, a curing time of 3 hours, an expansion ratio of 1.5, and a mixing specific gravity of 1.30.
When I added foamed polyethylene granules with a specific gravity of 0.7 and applied it to make it smooth, the thickness was easily 1. It was possible to apply to 0mm. Two to three grains of water had penetrated between the rubber chip particles from the surface layer. The thickness of the foamed urethane resin layer that was completely cured after 5 hours was about 2 m+o. Furthermore, a two-component elastic urethane coating flooring material (hardness Shore A80, tensile strength 90 kgf/am", elongation 2
40%, tear strength 37kgf/am, product name Art 70
ANS = Chugai Shoko Co., Ltd.) 100 parts by weight of the main agent and 100 parts by weight of the curing agent were applied to the surface at 2.5 parts per square meter.
kg was applied. The thus finished floor had excellent cushioning properties, durability, heat insulation properties, smoothness, and sound absorption properties, and was comfortable to walk on. Example 2 Particles of ethylene-vinyl acetate (EVA) having a diameter of 211IIll and a specific gravity of 0.95 were added to the two-component foamed urethane resin used in Example 1 on a smooth mortar base. Added 20% by weight, 2
When coated with gold iron to make it smooth in a room at 5°C, it was easily coated evenly to a thickness of about 2.5 mar, and was completely cured in 3 hours. The thickness after foaming and curing was 3.511II11. Furthermore, the two-component elastic urethane coating flooring material [Art 707-NSI used in Example 1] was applied thereon to a thickness of 3III6. The floor finished in this way has cushioning properties, durability,
It had excellent smoothness, heat insulation and sound absorption properties. Example 3 Moisture-curing urethane resin (trade name: DIC Braimer U, manufactured by Dainippon Ink & Chemicals Co., Ltd.) was applied as a braker on a smooth concrete base at a weight of 0.2 kg per square meter, Dry. On top of this, a diameter of 3I was added to the two-component foamed urethane resin used in Example 1.
When 3% by weight of foamed styrene beads with II11 and specific gravity of 0.033 were added to foamed urethane resin, it was coated smoothly with metal iron in a room at 25°C, and it was easily coated to a thickness of 31. It was completely cured in 3 hours. The thickness after foaming and curing was approximately 611III. On top of that, similar to Example 1, a flooring material [ART 70 ARNS
J was applied to a thickness of 2 mm. The floors finished in this way have cushioning properties, durability,
The floor had excellent insulation, smoothness, and sound absorption, and was comfortable to walk on.

[Brief explanation of the drawing]

The drawing is a sectional view of the floor pavement structure of the present invention. 1...Hard base 2... Base layer (elastic granule layer) 3... Intermediate coating layer and blinding layer 4...Room temperature curing liquid resin

Claims (1)

[Claims] 1. A base layer is constructed by spreading a mixed material consisting of elastic granules and a moisture-curing liquid resin as a binder to a uniform thickness on a hard base so as to form voids inside. Next, an intermediate coating layer and blinding layer made of a two-component foamed urethane resin containing particulate matter is applied on the base layer, and then a room temperature curing liquid resin is applied on the intermediate coating layer and blinding layer to form a surface layer. A floor covering structure comprising: 2. In the floor pavement structure according to claim 1, the granules of the granule-containing two-component foamed urethane resin have a diameter of 0.1 mm or more and a specific gravity of 0.02 to 1.40. A floor pavement structure featuring: 3. A floor pavement structure according to claim 1 or 2, wherein the two-component foamed urethane resin containing granules contains a thixotropy imparting agent.