JP2514511B2 - Adhesive composition for patterned floor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive composition for a patterned floor, and more particularly to an adhesive composition for a patterned floor which is formed on a base material by casting and spreading.

[0002]

2. Description of the Related Art Generally, as a floor material for maintaining cleanliness in a room, a long floor,
Synthetic resin floor materials such as tile floors and painted floors are used. Of these, the painted floor is constructed on-site by the wet method, so the pattern formed is inferior in variation and stability. On the other hand, upholstered floors such as long floors and tile floors produced by a dry method are produced by factory production, and thus a stable pattern can be provided. Therefore, of the synthetic resin floor materials, most of the floor materials having a pattern are long floors, tile floors, and the like.

On the other hand, for factory floors and clean room floors requiring a high degree of cleanliness, coated floors excellent in seamlessness, high durability and chemical resistance, especially spread floor coated floors are widely used. Since these coated floors are monochromatic and monotonous, the appearance of coated flooring materials with a pattern has been desired. In order to meet such demands, various types of coated floors have been proposed, for example, Japanese Patent Publication No. 50-1293 and Japanese Patent Laid-Open No. 58-58.
A coating floor as described in JP-A-160472 is known. That is, in the case of the coated floor described in the former, as shown in FIG. 4, the synthetic resin adhesive 32 is applied onto the concrete surface 30, and before the adhesive 32 dries, the surface of the adhesive 32 is colored mica flakes. After spraying 33 and drying, the transparent resin 34 is applied to form a protective layer.

In the latter one, the flakes on the surface of the coated floor material are mixed by mixing flakes having a specific gravity smaller than that of the coated floor material made of the synthetic resin into the coated floor material made of the synthetic resin. It is said that flakes are aligned and the flakes are aligned along the flow during application by flow spreading, so that a uniform patterned floor is obtained. However, in the former case, the colored mica pieces 33 are partially concentrated due to the way of spraying the colored mica pieces 33, and a uniform pattern cannot be obtained. In the latter case, flakes are previously applied to the resin. Since they are kneaded, there is a problem that if a large number of flakes are overlapped, the overlap cannot be removed simply by spreading. Further, in both of them, since the flooring material is simply poured or spread directly on the base material such as concrete, cracks, depressions, swelling, and peeling are likely to occur under the influence of the concrete as the base material.

The present applicant has previously filed a patent application in order to solve these drawbacks of the prior art and to provide a sinking floor capable of obtaining a flat surface and imparting a uniform pattern. (Japanese Patent Laid-Open No. 2-171464). That is, the invention according to this earlier application is to provide an undercoating layer having a flat surface on the undercoating, apply an adhesive to the surface of the undercoating layer, and form a flaky shape before the adhesive hardens. After spreading the flakes and adhering the flakes, a polishing treatment is performed to remove the flakes that are unstablely adhered to form a pattern layer,
A transparent resin is flown and spread on the pattern layer to form a transparent resin layer.

Of these, the following properties are required for the adhesive which greatly affects the formation of the pattern layer. (1) Since flakes are scattered while uncured, it must have sufficient adhesive strength. (2) In order to obtain a uniform pattern, it should have a uniform adhesive force to the scattered flakes. (3) In expressing the planar shape of the flakes as a pattern,
The flakes do not sink into the adhesive layer.

In the above-mentioned applicant's earlier application, an epoxy paint containing Epicoat 1001 (trade name) as a main component is used as an adhesive in the embodiment in view of adhesive strength, chemical resistance and the like. Although such a paint itself has a high adhesive strength, since the Epicoat 1001 is a solid type epoxy resin at room temperature, the solvent diluting paint material has the characteristic that the solvent volatilizes from the coating surface immediately after coating. The solidification starts from the surface layer by the start of, and a state in which the surface becomes so-called skin appears in the initial stage of curing. In such a skinned state, the flakes can be prevented from sinking, but the flakes cannot be adhered to the surface layer. Therefore, it is necessary to sprinkle and bond the flakes before skinning occurs, but the surface dryness varies depending on the thickness of the coating film and the elapsed time after application. There is a problem that the state is not constant. As a result, a difference occurs in the adhesion state of flakes, which adversely affects the formation of a uniform pattern. In order to prevent this, the time from the application of the adhesive to the application of the flakes may be made constant within a few minutes, but it is extremely difficult in practice in the field construction.

On the other hand, when a liquid type epoxy resin (for example, Epicoat 828 (trade name)) is used as the epoxy resin, the surface skinning hardly appears during the curing process of the coating film, so that the above-mentioned unevenness occurs. Although it does not occur and the adhesive strength is sufficient, if the coating is fluid in the uncured state, the flakes sink due to the falling force of the flakes at the time of spraying and the difference in specific gravity from the adhesive layer. Since the flakes do not remain on the surface, there is a problem that the planar shape of the flakes cannot be expressed as a pattern.

The object of the present invention is to solve the above-mentioned technical problems, to prevent flakes from sinking, and to prevent the difference in the solidified state of the surface depending on the construction conditions at the site, which is suitable for on-site construction. An object is to provide an adhesive composition.

[0010]

The adhesive composition for a patterned floor of the present invention was completed in order to solve the above-mentioned problems, and comprises an epoxy resin which is liquid at room temperature and a solid at room temperature. 9 type epoxy resin composition ratio
It is characterized in that it contains a main agent mixed in a ratio of 5: 5 to 50:50 (weight ratio).

As described above, in the adhesive composition of the present invention, the adhesive is applied on the undercoating layer, the flaky colored flakes are dispersed on the adhesive, and the adhesive is cured to obtain the adhesive composition. A pattern layer is formed by adhering flakes, and the surface is covered with a pattern protection layer, which is used for construction of a pattern floor by the flow spreading method, and by applying it on a base treatment layer, Only the surface layer is dried to be in a so-called skinned state, the sinking of the flakes is prevented, and since the adhesive force remains on the surface of the adhesive layer, the flakes can be bonded.

Examples of the liquid type epoxy resin at room temperature include a bisphenol A type liquid resin such as the above-mentioned Epicoat 828 and a bisphenol F type liquid resin. Examples of the solid type epoxy resin at room temperature include bisphenol A type solid resin such as the above-mentioned Epicoat 1001.

The ratio of the liquid type epoxy resin to the solid type epoxy resin is 95: 5 to 50:50,
It is preferably 90:10 to 70:30 (weight ratio). When the solid type epoxy resin exceeds the above range at room temperature, the flakes do not sink, but
The adhesive force on the surface becomes uneven, and the flakes become uneven in adhesion. On the other hand, when the solid type epoxy resin is smaller than the above range at room temperature, the flakes sink.

The adhesive composition of the present invention is prepared by mixing a curing agent, a filler, a coloring agent, a solvent and the like with the main component consisting of a predetermined ratio of the liquid type epoxy resin and the solid type epoxy resin. Is prepared. Examples of the curing agent include modified aliphatic amine, modified alicyclic amine, modified aromatic amine, modified polyamidoamine (all of which are epoxy-added products,
Mannich accessories etc.) and the like. Examples of the filler include calcium carbonate, barium sulfate, aluminum oxide, silica, mica and the like. Examples of the solvent include xylene, benzyl alcohol, isopropyl alcohol, n-butanol and the like, and these can be used alone or in admixture of two or more.
The respective components such as these curing agents and fillers can be used in the amounts usually added.

The adhesive composition of the present invention has a viscosity of 5000 cps at the time of stirring and mixing the main agent and the curing agent from the viewpoint of workability when it is applied on the base treatment layer by roller brush, spray coating or the like. The following is preferable. Next, the procedure of on-site construction of a patterned floor using the adhesive composition of the present invention will be specifically described. First, as shown in FIG. 1, an epoxy resin mortar is cast in advance on the surface of a base 2 such as concrete to form a base treatment layer 3. The epoxy resin mortar contains Epicoat 828 (described above) as a main component, and a curing agent (modified aliphatic polyamine or the like), aggregate (silicic acid) or the like is added thereto. The undercoat layer 3 is polished by a polisher or the like to make the surface flat.

After the undercoating layer 3 is formed on the surface of the undercoating layer 1 in this manner, the adhesive composition of the present invention is applied to the surface of the undercoating layer 3 with a roller brush or the like to form the adhesive layer 4. . Immediately after the application of the adhesive paint, the flaky colored flakes 5 are sufficiently dispersed and adhered to the surface of the adhesive layer 4.
As the flakes 5, plastic pieces such as acrylic resin and vinyl acetate resin, mineral pieces such as mica, and metal pieces such as aluminum can be used as they are or colored.

After the adhesive layer 4 is cured with the flakes attached to the surface, a polishing treatment is performed with a polisher with paper. The paper preferably has a roughness of about # 24 to 240. By this scouring treatment, the flakes 5 which are not sufficiently adhered to the adhesive layer 4 are removed. On the surface of the adhesive layer 4 from which a part of the flakes 5 are removed, a mottled and beautiful pattern appears due to the large number of flakes 5 and the adhesive layer 4, as shown in FIG.

Then, as shown in FIG. 3, a transparent resin is flown and spread on the surface of the adhesive layer 4 having the pattern formed thereon to form a smooth transparent resin layer 6. As a result, the desired patterned floor 1 is obtained. As the transparent resin, for example, a resin containing Epicoat 828 described above as a main component can be used. The thickness of the transparent resin layer 6 is preferably 0.5 mm or more.

In place of the scouring treatment after the adhesive layer 4 is cured, air may be blown to remove excess flakes, and when the flakes are uniformly dispersed, the scouring treatment or the like may be performed. Is unnecessary. Further, in some cases, the flakes can take various postures to express a novel pattern, and thus a processing such as a blasting treatment is not always necessary.

[0020]

【Example】

Examples 1 to 5 and Comparative Examples 1 to 3 The following composition was prepared as an adhesive composition for a patterned floor. Epicoat 828 (liquid type epoxy resin at room temperature) and Epicoat 1001 (solid type epoxy resin at room temperature) were blended at a ratio shown in Table 1 to 40% by weight of the main agent, and heavy calcium carbonate (filler was added). ) 41% by weight, pigment 8% by weight, xylene 5.4% by weight, isopropyl alcohol 1.3% by weight, and benzyl alcohol (diluent) 4% by weight were added to obtain a resin component.

On the other hand, the curing agent component is 80% by weight of modified aliphatic amine (curing agent), 15% by weight of xylene and n-.
It was prepared with a composition ratio of 5% by weight of butanol. As shown in FIG. 1, after an epicoat 828 was applied in advance on a concrete base 2 to prepare a base treatment layer 3, an adhesive composition 3 was prepared by stirring and mixing the above resin component and curing agent component.
It was applied at 50 g / m ² . 5 minutes after applying the adhesive, 10
After 15 minutes, 15 minutes, and 20 minutes, flaky colored flakes (mixture of vinyl acetate and acrylic resin) were sprayed. The spraying was performed in a room having a room temperature of 20 ° C. and a humidity of 60%.

Then, the adhesion unevenness and subsidence of the flakes were evaluated. The adhesion unevenness is obtained by curing the adhesive layer after applying the flakes and performing a cleaning treatment with a # 60 paper-attached polisher.
△: slightly uneven adhesion, ×: uneven adhesion
Was evaluated. The sinking of the flakes was evaluated by visually observing the one without sinking, the mark Δ with slightly sinking, and the mark X with sinking.

[0023]

[Table 1]

In actual on-site construction, it usually takes about 5 to 15 minutes between the application of the roller brush or spray coating of the adhesive and the flake application (several tens of meters).
² to several hundred m ² / room, assuming that one side is within 30 m). Therefore, from the results of the above test corresponding to actual on-site construction, when the solid epoxy resin content is 5 to 50%, more preferably 10 to 30% of the liquid epoxy resin and the solid epoxy resin which are the main components (implement Examples 1 to 5) show that a pattern floor without flake adhesion unevenness or sinking can be obtained by on-site construction.

[0025]

As described above, according to the adhesive composition for a patterned floor of the present invention, an adhesive is applied onto the undercoating layer and flaky flakes are spread on the adhesive to form an adhesive. In the construction of the pattern floor by the flow spreading method, in which the flakes are cured and the flakes are bonded to each other to form the pattern layer, there is no sinking of flaky flakes into the adhesive layer, and the flake shape is expressed. In addition, since the difference in the drying condition of the adhesive surface is unlikely to occur, there is no uneven adhesion of the flakes. The effect is that a beautiful patterned floor can be easily obtained by construction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing how flakes are scattered on the surface of an adhesive layer in the construction of a patterned floor according to the present invention.

FIG. 2 is a cross-sectional view showing a state where the surface of the adhesive layer shown in FIG. 1 is subjected to a scouring treatment.

FIG. 3 is a cross-sectional view showing a patterned floor in which a transparent resin layer is provided on the surface of the adhesive layer that has been subjected to the scouring treatment shown in FIG.

FIG. 4 is a cross-sectional view of a patterned floor obtained by a conventional sinking method.

[Explanation of symbols]

 1 patterned floor 2 ground 3 ground processing layer 4 adhesive layer 5 flakes 6 transparent resin layer

Claims (1)

(57) [Claims] 1. A pattern layer is formed by applying an adhesive on a base treatment layer, spreading flaky flakes on the adhesive, curing the adhesive, and adhering the flakes.
An adhesive composition for a patterned floor used for construction of a patterned floor by a flow spreading method, comprising a liquid type epoxy resin at room temperature and a solid type epoxy resin at room temperature in a composition ratio of 95: 5 to 50. An adhesive composition for a patterned floor for on-site construction, characterized in that it contains a main agent mixed in a ratio of 50 (weight ratio).