JPH07217105A - Working method of finish layer - Google Patents

Abstract

PURPOSE:To obtain an excellent durability, by mixing aggregates and a solvent with an urethane resin to get a slurry mixture and after application thereof, applying a mixture with the same composition and curing it to form a finish layer. CONSTITUTION:A mixture containing aggregates composed of 50-250wt.% silica sand against a thermosetting resin composed of a polyurethane resin, an epoxy resin, and an unsaturated polyester resin is laminate and cured so as to form a thickness of at most 3mm. A mixture having the same composition with the above mixture is applied and cured so as to form a finish layer of the second process having at least 3mm thick layer on the laminated and cured finish layer of the first process having at most 3mm thick layer. Accordingly, a coating floor material of an excellent non-slipping feature and driving durability can be obtained.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is a floor coating material for use in fields such as rooftop parking lots, bicycle parking lots, amusement parks, factory floors and warehouses, where load resistance, non-slip properties and running durability are required. The present invention relates to a method of applying a finishing layer containing aggregate in a waterproof material.

[0002]

2. Description of the Related Art Conventionally, as a method of applying a finishing layer containing aggregates used in the above fields, urethane flooring or epoxy flooring is applied and a required amount of aggregates is sprayed, or flooring is applied. There is also a method in which an excessive amount of aggregate is sprinkled on it, and after the floor material resin is cured, the unattached aggregate is removed and the floor material is applied again. Alternatively, there is a resin mortar construction method in which a floor material and an aggregate are kneaded in advance and stretched with a rake or a plaster ruler and then pressed with a trowel to finish.

However, in all of these methods, it was difficult to finish the surface layer having a film thickness required to sufficiently secure the running durability of the vehicle with good workability and to obtain a uniform uneven surface.
In addition, if the floor material is applied over 1 mm in order to secure the required film thickness, even if the aggregate appears to be evenly spread, it tends to be scattered or uneven uneven textured surface due to sedimentation of the aggregate or capillary action. .

In the resin mortar construction method in which one floor material and the aggregate are kneaded in advance and finished with a trowel, the thermosetting resin and the aggregate are generally 1: 3 to 8 so that the resin and the aggregate are difficult to separate. A high-viscosity mixture kneaded at a weight ratio of 2 to 6 mm is applied in a film thickness. With this method, a uniform kneaded product can be obtained by spreading it with a trowel at the end while spreading the kneaded product, but a uniform surface appearance can be obtained, but the viscosity of the mixture is extremely high, which makes it difficult to apply and it is difficult to control the film thickness. Since it takes a considerable amount of time to carry out the prescribed amount of mixing, there has been a problem that the work cannot be performed beyond the pot life of the resin.

[0005]

[Problems to be Solved by the Invention] Construction objects for buildings used for purposes such as parking lots generally have a large area such as 2000 m ² or more, and in the conventional aggregate dispersal method and resin mortar construction method, The larger the area of construction, the more difficult the aesthetics of the surface finish and workability.

[0006]

The present invention is the following invention which solves the above problems. That is, in a method of applying a finishing layer in floor construction or roof construction, which comprises laminating and curing a mixture containing 50 to 250% by weight of an aggregate with respect to a thermosetting resin to a thickness of 3 mm or more, laminating in one step. It is a finishing layer construction method characterized in that the thickness to be cured is less than 3 mm and the construction is performed in at least two steps.

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. The thermosetting resin used in the present invention may be selected from polyurethane resins, epoxy resins and unsaturated polyester resins. If necessary, the solvent may be contained in an amount of 0 to 30% by weight with respect to the thermosetting resin. Since the viscosity varies depending on the type of thermosetting resin used, the addition amount may be changed. For example, when a polyurethane resin is used, 5 to 15% by weight is most preferable in terms of coating workability.
If it exceeds 0%, cracking may occur in the surface layer due to curing shrinkage after evaporation of the solvent, which is not preferable.

Among the resins, a polyurethane resin is particularly preferable. As the polyurethane resin, the urethane flooring agent used for ordinary flooring materials can be applied, but if the strength is insufficient, it is easy for the aggregate to fall off due to running of the vehicle or the resin itself to crack or break, so the hardness JIS A material having an A of 70 or more and a tensile strength of 70 kg / cm ² or more is desirable.

The aggregate used in the present invention is not particularly limited, but there are silica sand, shirasu balloon, silica sand, ceramic beads, walnut powder, etc., and silica sand is particularly preferable. The particle size of silica sand is not particularly limited,
If the particle size is too large, the non-slip property when driving or walking is improved, but when applying a top coat on the finishing layer, it becomes difficult to apply the top coat evenly, and tire marks and heel marks of shoes due to running the car. Is likely to adhere, which is not preferable. On the contrary, if the particle size is too small, the non-slip property becomes insufficient.
No. 4 is preferable, and Nos. 4 to 6 are particularly preferable.

The use ratio of the thermosetting resin and the aggregate is 50 to 250% by weight based on the thermosetting resin. Within this range, the viscosity does not increase significantly compared to the case where only thermosetting resin is used, so construction can be performed with almost the same feeling as flooring that does not contain aggregate, and a prescribed amount of mixture is used within the pot life of the resin. The coating work can be completed easily. If the mixing weight ratio of the aggregate exceeds 250% by weight, the thickening will be severe and the construction will be hindered like the resin mortar method.
If it is less than 0% by weight, the amount of the aggregate is too small, the running durability of the vehicle is insufficient, and the uneven surface of the coating surface cannot be sufficiently expressed.
It is preferable to use a thermosetting resin and an aggregate that are kneaded in advance to form a slurry.

In the present invention, the film thickness of the finishing layer required to ensure sufficient running durability of the vehicle cannot be determined by the mechanical strength of the thermosetting resin and the passage frequency, but in consideration of abrasion due to long-term wear. 3 mm or more is suitable.

However, when a mixture in the form of a slurry in which a thermosetting resin and an aggregate are kneaded in advance at a predetermined ratio is applied so as to have a film thickness of 3 mm or more in one step, it becomes difficult to control the film thickness, and the aggregate is difficult. Gradually settles, and it becomes impossible to develop a uniform uneven surface of aggregate on the surface.

Therefore, in the present invention, the film thickness applied in one step is less than 3 mm, that is, 3 mm.
After coating and curing the mixture so that it is less than,
The process of applying and curing the mixture is repeated.

Since the kneaded slurry mixture is laminated and hardened in two or more steps, the film thickness can be more evenly ensured, and the coating thickness per application is reduced to 3 mm or less. The sedimentation of the aggregate can be prevented, and the uneven surface of the aggregate can be expressed. The number of steps is preferably 2 to 3, and particularly preferably 2.

As a method of applying the finishing layer containing the aggregate, specifically, a thickness of about 1.5 mm is set to 2 by a trowel.
There is a method of applying it in batches, or a method of applying it with a trowel to a thickness of about 2.5 mm and then spraying a thickness of about 0.5 mm with a resin gun, a mortar gun, etc. to finish it. Not done. Instead of a trowel, you can use a flexible broom, a rubber rake for draining water, or a sponge rake.

The finishing layer in the present invention is particularly suitable as a finishing layer for floors or roofs for applications where load resistance and running durability of vehicles are required.

In a rooftop parking lot or the like that requires waterproofing, a waterproof layer may be applied and a finishing layer containing aggregate may be laminated.

As the material of the waterproof layer, there are urethane rubber type, acrylic rubber type, rubber asphalt type and the like. Particularly preferred is a known polyurethane coating film waterproof material system, more preferably roof coating film waterproof material JIS A 6021.
It is to use a urethane coating film waterproof material having a performance that passes the urethane rubber type 1 standard. Further, when the urethane waterproof material is applied, the applied film thickness is usually preferably 2 to 5 mm.

Further, it is preferable to apply a top coat on the finishing layer composed of an aggregate and a resin for the purpose of imparting weather resistance, improving the appearance and retaining the same. Examples of the material for the top coat include acrylic urethane compounds.

[0020]

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples.

(Example 1) A urethane-based one-component primer was applied to a concrete panel in an amount of 0.25 kg / m ² , and a waterproof material was laminated thereon in a total of 3.5 kg / m ² to form a waterproof layer. Obtained. Urethane-based two-liquid floor material 10 for the finishing layer
00 parts by weight, 100 parts by weight of xylene, and silica sand No. 1
500 parts by weight were kneaded to obtain a slurry mixture. 2.6 kg / m ² of this slurry mixture was applied with a trowel and cured. Then 2.6 kg of a slurry mixture of the same composition
/ M ² applied with a trowel and cured to give a finish layer thickness of 3.
A urethane coating film layer having a uniform surface of 2 mm was obtained. Finally, 0.2 kg / m ² of acrylic urethane type two-component top coat was applied for completion.

(Example 2) A slurry mixture obtained by kneading 1000 parts by weight of a urethane-based two-component flooring material, 100 parts by weight of xylene, and 1500 parts by weight of silica sand No. 5 on the same waterproof layer as in Example 1. 4.5 kg / m ² was applied with a trowel.
Furthermore, 1000 parts by weight of the same urethane-based two-liquid flooring material, 150 parts by weight of xylene, and 600 parts by weight of silica sand No. 5 were kneaded to obtain a slurry-like mixture 0.6 kg / m ² and a mortar having a diameter of 4.5 mm. The coating film was uniformly sprayed with a gun to obtain a urethane coating film layer having a finish layer with a thickness of 3 mm and a uniform uneven surface. Finally, 0.2 kg / m ² of acrylic urethane type two-component top coat was applied for completion.

(Comparative Example 1) 1.2 kg / m ² of urethane type two-liquid floor material was applied on the same waterproof layer as in Example 1, and immediately after that, silica sand No. 5 was sprayed at 4 kg / m ² . After the floor material hardened, the silica sand that had not adhered was removed, and a urethane floor material was further applied at 0.8 kg / m ² to fix the silica sand. Finally, 0.2 kg of acrylic urethane type two-component top coat
/ M ^{2 was} applied, but sand sprinkles were seen on the surface layer, and smooth parts where silica sand was not exposed were also seen in places.

(Comparative Example 2) On the same waterproof layer as in Example 1, as a finishing layer, 1000 parts by weight of a urethane type two-liquid flooring material, 100 parts by weight of xylene and 300 parts by weight of silica sand No. 5 were kneaded to obtain a resin. A mortar-like mixture was obtained. 6.15 kg / m ² of this mixture was preliminarily diffused with a plaster ruler, and then pressed with a trowel to finish by tracing many times so that the surface became smooth. A urethane coating layer having a dense uneven surface with a finish layer thickness of 3.2 mm was obtained. Finally, 0.2 kg of an acrylic urethane-based top coat was applied and completed.

(Comparative Example 3) On the same waterproof layer as in Example 1, 1000 parts by weight of a urethane type two-liquid flooring material, 100 parts by weight of xylene and 1500 parts by weight of silica sand No. 5 were kneaded as a finishing layer. The slurry mixture (2.6 kg / m ²⁾ was applied with a trowel to obtain a urethane coating layer having a finish layer thickness of 1.6 mm and a uniform uneven surface. Finally, 0.2 kg / m ² of acrylic urethane type two-component top coat was applied to complete the process.

Comparative Example 4 The same waterproof layer as in Example 1 was kneaded with 1000 parts by weight of a urethane type two-liquid flooring material, 100 parts by weight of xylene, and 2000 parts by weight of silica sand No. 5 as a finishing layer. Slurry mixture 6.2 kg / m ²
Was applied with a trowel to obtain a urethane coating layer having a smooth surface with a finishing layer having a thickness of 3.5 mm and silica sand not exposed. Finally, 0.2 kg of an acrylic urethane two-component top coat was applied to complete the process.

[Evaluation] <Coating workability> The time required for applying 1 m ² of the finishing layer containing aggregate was roughly calculated by an experiment (unit: second / m ² ).

<Appearance of finished surface layer> Visually and by applying a plaster ruler to the surface, smoothness and unevenness of silica sand (unevenness)
Was observed and evaluated. However, the evaluation of the smoothness of the whole surface is
⊚: extremely evenly flat, ◯: almost flat, ×: wavy unevenness.

The evaluation of the unevenness of the aggregate is ⊚: extremely uniform non-slip surface, ∘; almost uniform non-slip surface, ×;
There was a rise in aggregate and a smooth surface without sand.

<Non-slip property> JIS A 1407
The slip resistance coefficient was measured according to. Generally, it is said that it is slippery above 0.4.

<Vehicle running durability> The coated panel concrete panels of Examples 1 and 2 and Comparative Examples 1 to 4 were fixed to the road, and a forklift with a vehicle weight of 3.7 tons suddenly started on the coating surface. The running test was repeated by repeating the steering wheel turning 50 times, and the durability of the coating film was compared.

[0032]

[Table 1]

[0033]

Industrial Applicability According to the present invention, it is possible to provide a coated flooring material containing an aggregate and having excellent non-slip properties and excellent running durability for a vehicle such as a parking lot. Aggregate is always dispersed evenly in a coating system that is a composite of aggregate and resin, and it has good workability and can be applied to the construction of a wide property.

Claims (5)

[Claims] 1. A method of applying a finishing layer in floor construction or roof construction, comprising laminating and curing a mixture containing 50 to 250% by weight of an aggregate with respect to a thermosetting resin to a thickness of 3 mm or more. The thickness to be laminated and hardened in the process is 3
A method for applying a finishing layer, which is less than mm and is applied in at least two steps. 2. The construction method according to claim 1, wherein the thermosetting resin is selected from polyurethane resins, epoxy resins and unsaturated polyester resins. 3. The method according to claim 1, wherein a mixture prepared by previously kneading the thermosetting resin and the aggregate into a slurry is used. 4. The construction method according to claim 1, wherein the aggregate is silica sand. 5. The construction method according to any one of claims 1 to 4, which is a floor or rooftop construction method for applications where load resistance and vehicle running durability are required.