JPH05230434A - Adhesive composition for bonding flooring - Google Patents

Abstract

PURPOSE:To prepare the title compsn. which can easily bond, even at a low temp. in winter, a flooring deformed by winding or during transport to a substrate, prevents the expansion and contraction of the flooring due to change in room temp. and the occurrence of openings at the joints due to change with time over a long term, is environmentally safe, and enables easy repairing of a part poorly bonded to the substrate if such a defective part appears in the flooring. CONSTITUTION:A synthetic resin emulsion excellent in initial self-adhesive power is compounded with a compsn. and/or a crosslinker having reactive groups capable of curing the emulsion at room temp., giving the title compsn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-site adhesive composition for flooring, and more particularly to a floor suitable for on-site construction of flooring material such as soft vinyl chloride resin sheet or soft vinyl chloride resin tile. The present invention relates to an adhesive composition for wood.

[0002]

2. Description of the Related Art Soft vinyl chloride resin sheet floor materials and soft vinyl chloride resin tiles are easily affected by temperature, and are soft in summer and hard in winter. Soft vinyl chloride resin sheet floor material is roll-shaped with an arbitrary number wound around a paper tube, and soft vinyl chloride resin tile is stored in a warehouse in the form of an arbitrary number of cardboard boxes packed in a warehouse and, if necessary, trucks Etc. are brought to the construction site. At that time, since the floor material is a heavy load, it is often stacked under the other luggage, and is often transported to the construction site in a deformed form due to an impact when the truck is running. For this reason, when laying floor material during construction (especially in winter), the sheet-shaped floor material is not easily curled or deformed during transportation, and the tile-shaped floor material is not easily deformed during transportation. It was difficult to apply, and problems such as peeling of the sheet-like floor material due to poor adhesion tended to occur.

Therefore, especially in winter, it is necessary to warm the room with a heating means such as a jet heater or to heat the soft vinyl chloride resin sheet-like floor material or tile-like floor material to remove curling or deformation. Yes, there was a problem in disaster prevention as well as it took a lot of work to construct. Furthermore, as an adhesive for construction, it also has an initial adhesive strength such that it can be attached to the floor base in a state where the curling and deformation of the sheet floor material or tile floor material is corrected, and a soft vinyl chloride resin. There is no known one having a cohesive force (adhesive force) enough to suppress expansion and contraction of sheets and tiles.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to overcome the above-mentioned conventional problems, and the object of the present invention is to curl or transport even at low temperatures in winter. It is possible to easily bond the deformed floor material to the floor base, prevent the floor material from expanding and contracting due to changes in temperature, and from opening the floor material joints due to long-term aging, and it is also environmentally safe. Another object of the present invention is to provide an adhesive composition for a floor material, which is easy to repair even if a defective adhesion portion of the floor material occurs.

[0005]

That is, the flooring adhesive of the present invention comprises a composition having a functional group curable at room temperature and / or a cross-linking agent mixed with a synthetic resin emulsion having an excellent initial tack. It consists of The initial adhesive strength is the adhesive strength that occurs at an arbitrary open time (waiting time) after applying the adhesive with an applicator (compressed iron etc.) on the floor base, and the strength of this initial adhesive strength This is to fix the curling or deformation of the floor-like or tile-like floor material and fix the floor material to the floor base.

At low temperatures (5 to 10 ° C.) in winter, the initial adhesive force required to correct the curling and deformation of the floor material is about 0.8 kg / 2 cm or more. In addition, the composition having a functional group curable at room temperature and / or the cross-linking agent is blended only with the adhesive strength of the synthetic resin emulsion having excellent initial adhesive strength to the temperature change of the soft vinyl chloride resin sheet or tile. Since it is not possible to prevent joint opening due to contraction of sheets and tiles due to expansion and contraction and long-term aging,
This is to secure an adhesive force (cohesive force) sufficient to suppress expansion and contraction of the soft vinyl chloride resin sheet or tile.

Examples of the synthetic resin emulsion having excellent initial tackiness used in the present invention include self-crosslinking type synthetic resin emulsion, synthetic rubber latex, non-crosslinking type synthetic resin emulsion and synthetic rubber latex.

Any self-crosslinking synthetic resin emulsion or synthetic rubber latex can be used as long as it has an excellent initial adhesive force. For example, a reaction of a carboxyl group, a hydroxyl group, an amide group, a glycidyl group, a methylol group, etc. A group in which a group is introduced into an emulsion or a latex polymer can be used. Examples of the emulsion or latex into which these reactive groups are introduced include acrylic resin emulsion, vinyl acetate resin emulsion, vinyl acetate-acrylic copolymer resin emulsion, vinyl chloride-vinyl acetate. -Acrylic copolymer resin emulsion, ethylene-vinyl acetate copolymer resin emulsion, ethylene-vinyl acetate-acrylic copolymer resin emulsion, acrylic-styrene-butadiene copolymer resin emulsion, urethane resin emulsion, SBR latex , NBR latex, CR latex and the like can be used. These self-crosslinking synthetic resin emulsions can be used alone or in combination of two or more.

As a concrete example of the self-crosslinking type synthetic resin emulsion, an acrylic acid ester or a methacrylic acid ester is used as a main component, and glycidyl acrylate or glycidyl methacrylate and three components of tert-butyl acrylate or acyl are used together. Examples thereof include emulsions obtained by polymerization, emulsions obtained by copolymerizing styrene-acrylic acid ester and acrylic amide, and then converting this to methylol.

As the non-crosslinking type synthetic resin emulsion and synthetic rubber latex, any one can be used as long as it has an excellent initial adhesive force. For example, vinyl chloride resin emulsion, vinyl chloride-ethylene copolymer resin emulsion,
Vinyl chloride-vinylidene chloride copolymer resin emulsion,
Vinyl chloride-vinyl acetate copolymer resin emulsion, vinylidene chloride resin emulsion, vinyl acetate resin emulsion, vinyl acetate-acrylic copolymer resin emulsion,
Synthetic resin emulsions such as ethylene-vinyl acetate copolymer resin emulsion, acrylic resin emulsion, acrylic-styrene copolymer resin emulsion, urethane resin emulsion, SBR latex, NBR latex,
Synthetic rubber latexes such as CR latex and IR latex can be used, and these non-crosslinking type synthetic resin emulsions and synthetic rubber latexes can be used alone or in combination of two or more kinds. .. Furthermore, these non-crosslinking type synthetic resin emulsions and synthetic rubber latexes can be used in combination with the above-mentioned self-crosslinking type synthetic resin emulsions and synthetic rubber latexes.

When a self-crosslinking type synthetic resin emulsion or synthetic rubber latex or an emulsion or latex containing these self-crosslinking type is used as the synthetic resin emulsion or synthetic rubber latex excellent in initial adhesive strength, A crosslinking agent can be used, and as the crosslinking agent, those generally used can be used. Specifically, urea resin precondensate, melamine resin precondensate,
Examples thereof include, but are not limited to, aziridine compounds such as ethyleneimine. The amount of the crosslinking agent added is preferably 5 to 30 parts by weight based on 100 parts by weight of the solid content of the self-crosslinking synthetic resin emulsion or synthetic rubber latex.

The composition having a functional group curable at room temperature used in the present invention has good compatibility with the above-mentioned synthetic resin emulsion and synthetic rubber latex having excellent initial adhesive strength, and has a soft vinyl chloride resin sheet or Anything can be used as long as it has good adhesiveness to the tile, for example, 1
Compound having at least one or more epoxy group in molecule, compound having at least one or more methylol group in molecule, compound having ethylenic double bond, isocyanurate derivative, acryl-modified epoxy resin, unsaturated cyclo Examples thereof include acetal resins, acrylic modified polyester resins, acrylic modified polyurethane resins, unsaturated polyester resins, diaryl phthalates, and aqueous solutions and aqueous emulsions of these compounds, which may be used alone or in combination of two or more. it can.

Examples of the compound having at least one epoxy group in one molecule include bisphenol A type epoxy resin (epoxy equivalent: 150 to 650), p-cresol type, xylene type and bisphenol type formalin novolac resin type. Examples thereof include epoxy resins, glycidyl amine type epoxy resins, and phenol novolac type epoxy resins, which can be used alone or in combination.

The compound having at least one methylol group in one molecule includes phenol formalin condensate, phenol furfural condensate, xylene formalin condensate, aniline formalin condensate, urea formalin condensate, melamine formalin condensate, Examples thereof include urea melamine formalin condensate, which can be used alone or in combination.

As the compound having an ethylenic double bond, ethylene glycol, propylene glycol, butylene glycol, 1,6-hexanediol, neopentyl glycol, polyethylene glycol, polypropylene glycol, trimethylolpropane, trimethylolmethane, glycerin, Examples thereof include acrylic polyfunctional compounds obtained from aliphatic polyhydric alcohols such as pentaerythritol and dipentaerythritol and acrylic acid or methacrylic acid, and these can be used alone or in combination.

Examples of the isocyanurate derivative include triallyl isocyanurate and tris- (2-methacryloyloxyethyl) -isocyanurate. The acryl-modified epoxy resin is bisphenol A type epoxy resin, phenol novolac type epoxy resin, cresol novolac. At least 2 in one molecule such as epoxy resin
Examples thereof include those obtained from an epoxy compound having at least one epoxy group and an unsaturated monobasic acid, and as the unsaturated cycloacetal resin, a polyvalent cycloacetal compound and a glycol unsaturated monocarboxylic acid monoester or a polyhydric alcohol. Examples thereof include reaction products with unsaturated monocarboxylic acid monoesters, and examples of acryl-modified polyester resins include oligoester acrylates.

As the curing agent for the epoxy resin, those generally used can be used. Specifically, ethylenediamine, diethylenetriamine, triethylenetetramine, N-aminoethylpiperazine, metaxylylenediamine, 1,3- Bis (aminomethyl) cyclohexane,
Aliphatic amines such as polyamides; paramenthanediamine,
Cycloaliphatic amines such as methulonediamine, isophoronediamine, bis (4-amino-3-methylcyclohexyl) methane, 2-ethyl-4-methylimidazole; metaphenylenediamine, 4,4'-diaminodiphenylmethane, 4,4 Aromatic amines such as'-diaminodiphenyl sulfone can be used, and these can be used alone or in combination of two or more kinds. The addition amount of the curing agent is calculated from the active hydrogen equivalent of each curing agent and the epoxy equivalent of the epoxy resin used. Further, a curing accelerator can be used in combination to accelerate the curing of the epoxy resin and the curing agent, and as the curing accelerator, a tertiary amine, a boron complex salt, an inorganic acid, dihydrazide or the like can be used.

As a curing accelerator for a compound having at least one methylol group in one molecule, ammonia, sodium hydroxide, sodium carbonate, hexamethylenetetramine, hydrochloric acid, sulfuric acid, acetic acid, phosphoric acid, sodium acid phosphate is used. , Sulfamic acid and the like, which can be used in an appropriate amount according to the purpose.

As the polymerization initiator for the compound having an ethylenic double bond, those generally used can be used. Specifically, methyl ethyl ketone peroxide,
Cyclohexanone peroxide, t-butyl hydroperoxide, cumene hydroperoxide, di-
t-butyl peroxide, t-butyl cumyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-
Di (t-butylperoxy) hexyne, 1,3-bis (t-
Butylperoxyisopropyl) benzene, 1,1-bis (t-butylperoxy) 3,3,5-trimethylcyclohexane, n-butyl-4,4-bis (t-butylperoxy)
Examples thereof include organic peroxides such as barrate, benzoyl peroxide, p-chlorobenzoyl peroxide, 2,6-dichlorobenzoyl peroxide, t-butylperoxybenzoate, and t-butylperoxyisopropyl carbonate, which are used alone. Alternatively, two or more kinds can be used in combination. Further, a catalyst may be used to accelerate curing, and examples of the catalyst include amines such as dimethylaniline and dimethylparatoluidine, and metal compounds such as cobalt naphthenate and zinc naphthenate.

The compounding amount of the above-mentioned composition having a functional group curable at room temperature is such that the solid content (nonvolatile content) of a synthetic resin emulsion or synthetic rubber latex having excellent initial adhesive strength is 10%.
5 to 60 parts by weight in terms of solid content is preferable to 0 part by weight. When the amount of the composition having a functional group curable at room temperature is less than 5 parts by weight in terms of solid content, the cohesive force after curing is insufficient, and a soft vinyl chloride resin sheet-like floor material or tile-like material When the expansion and contraction of the flooring material cannot be suppressed and the composition amount of the composition having a functional group curable at room temperature exceeds 60 parts by weight in terms of solid content, a synthetic resin emulsion having excellent initial adhesive strength. In addition, the initial adhesive strength of synthetic rubber latex is reduced and the intended purpose cannot be achieved.

Other compounding agents may be added to the flooring adhesive composition of the present invention as required. Examples of such compounding agents include fillers, viscosity modifiers, protective colloids, film forming aids, dispersants and the like.

As the filler, those generally used can be used, and specifically, calcium carbonate, magnesium carbonate, clay, talc, silica, diatomaceous earth, silica sand,
Pumice stone powder, slate powder, mica powder, aluminum hydroxide, aluminum oxide, aluminum sulfate, barium sulfate, calcium sulfate, glass spheres, foam glass spheres, fly ash spheres, inorganic fillers such as shirasu balloons, cellulose powder, polyvinyl alcohol fiber , Cork powder, wood powder,
Organic fillers such as thermosetting synthetic resin powder and thermosetting or thermoplastic resin hollow spheres can be mentioned.

As the viscosity modifier, bentonite, chemically modified precipitable calcium carbonate, ammonium salt of high molecular organic acid, water-soluble acrylic polymer, acrylic emulsion copolymer, crosslinked acrylic emulsion copolymer, ammonium, polymethacrylate, Ammonium polyacrylate, sodium polyacrylate, modified sodium polyacrylate, partially oxidized polyacrylic acid ester, methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, sodium fibrin glycolate, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, aqueous ammonia, etc. Can be mentioned.

Examples of protective colloids include amines of styrene sulfonic acid, ammonia, monovalent metal salts, and the like.
Examples of the film forming aid include propylene glycol monophenol ether, and examples of the dispersant include alkylnaphthalene sulfonate and alkylbenzene sulfonate.

Further, the flooring adhesive composition of the present invention comprises:
It is also possible to add an aqueous dispersion of a natural or petroleum resin to further improve the initial adhesive strength. Examples of such natural or petroleum-based resins include polyterpene-based resins, cyclopentadiene-based resins, aromatic petroleum-based resins, cellulose-based resins, starch-polyacrylonitrile copolymer resins, and the like. By using the resin in combination with a plasticizer represented by dioctyl phthalate, dibutyl phthalate, butyl benzyl phthalate, etc., the initial adhesive strength can be further improved.

The adhesive composition for flooring of the present invention is a composition having a functional group curable at room temperature, which is prepared by using a synthetic resin emulsion or a synthetic rubber latex having excellent initial tackiness as a base of the adhesive. And / or a cross-linking agent are combined to make it possible to easily install a floor material that has been deformed during winding or transportation even during low temperatures in winter during the construction of the floor material, as well as poor adhesion of the floor material (from the base material). Easy to repair even if there is plow (repair is possible about 2 weeks after construction)
Is. Furthermore, after the construction, the composition having a functional group curable at room temperature and / or the cross-linking agent gradually reacts to strengthen the cohesive force of the adhesive layer, thereby expanding or contracting the flooring material due to temperature changes and aging for a long time. It is possible to suppress the joint opening due to the change.

[0026]

【Example】

Example 1 50 parts by weight of ethylene-vinyl acetate copolymer emulsion (solid content concentration: 55% by weight) in terms of solid content, bisphenol A type epoxy resin emulsion (solid content concentration: 5)
5 parts by weight of 0% by weight, epoxy equivalent: 520) in terms of solid content, and 17 parts by weight of clay as a filler were mixed and stirred to prepare a main agent. On the other hand, 50 parts by weight of acrylic resin emulsion (solid content concentration: 60% by weight) in terms of solid content, 1.1 parts by weight of imidazole-based curing agent as a curing agent, and 13.3 parts by weight of clay as a filler are mixed and stirred to obtain a curing agent. A composition was prepared. Next, the main component and the curing agent composition are mixed at a solid content weight ratio of 1: 1 to prepare an adhesive composition.
Two sheets having a thickness of about 10mm asbestos slate plate of 50 mm × 250 mm, was applied to approximately 210g / m ² in terms of solid content using Kushigote, in an atmosphere of 60% relative humidity at 10 ° C. Immediately after the coating Leave it for about 20 minutes, stick a soft vinyl chloride resin sheet floor material with a thickness of 250 mm × 250 mm and a thickness of 2 mm, press it with a hand roller, make two samples, and immediately peel one of them with a spring balance. The strength was measured and used as the initial adhesive strength. The remaining one sample is 10 ℃
And dried in an atmosphere of 60% relative humidity for 2 weeks. After being left for 2 weeks, only the soft vinyl chloride resin sheet-like flooring material of the sample was cut with a cutter knife in the vertical and horizontal directions, and cuts were made in a cross shape. Peel strength was measured with a spring balance using a part of the cut, and the relative humidity was 90 to 9 at 70 ° C.
It was left to stand in a 5% atmosphere for 1000 hours, and the degree of joint opening at the cut portion and the presence or absence of partial peeling were confirmed. The results are shown in Table 1.

Furthermore, 1% of the above-mentioned adhesive composition for flooring materials
In a 0 ° C atmosphere, it was coated with concrete on a base made of concrete so that the solid content was about 210 g / m ^2, and an open time of about 40 minutes (waiting time for obtaining the initial adhesive strength) was taken. Later, length 10m, width 2m, thickness 2mm
The soft vinyl chloride resin sheet-like flooring material of No. 1 was attached and roller covering was performed. We were able to easily correct the curling and deformation of the soft vinyl chloride resin sheet-like flooring material, and we were able to obtain a good construction condition without the hassle of conventional work.

Example 2 The amount of the bisphenol A type epoxy resin emulsion (solid content concentration: 50% by weight, epoxy equivalent: 520) as the main ingredient in Example 1 was 17 parts by weight in terms of solid content,
A sample was prepared in the same manner as in Example 1 except that the addition amount of the imidazole-based curing agent in the curing composition was 3.4 parts by weight,
Similar tests were conducted. The results are shown in Table 1.

Example 3 The blending amount of the bisphenol A type epoxy resin emulsion (solid content concentration: 50% by weight, epoxy equivalent: 520) as the main ingredient in Example 1 was set to 30 parts by weight in terms of solid content,
A sample was prepared in the same manner as in Example 1 except that the addition amount of the imidazole-based curing agent in the curing composition was 5.3 parts by weight,
Similar tests were conducted. The results are shown in Table 1.

Example 4 The compounding amount of the main ingredient bisphenol A type epoxy resin emulsion (solid content concentration: 50% by weight, epoxy equivalent: 520) in Example 1 was set to 60 parts by weight in terms of solid content,
A sample was prepared in the same manner as in Example 1 except that the amount of the imidazole-based curing agent added to the cured composition was 8.5 parts by weight,
Similar tests were conducted. The results are shown in Table 1.

Example 5 The blending amount of the bisphenol A type epoxy resin emulsion (solid content concentration: 50% by weight, epoxy equivalent: 520) as the main ingredient in Example 1 was 80 parts by weight in terms of solid content,
A sample was prepared in the same manner as in Example 1 except that the addition amount of the imidazole-based curing agent in the curing composition was 10 parts by weight,
Similar tests were conducted. The results are shown in Table 1.

[0032]

[Table 1] When the adhesive composition for flooring material of the present invention shown in Examples 1 to 5 is used, it is possible to obtain a predetermined initial adhesive force and adhesiveness, and moreover, a joint opening or part due to expansion and contraction of the soft vinyl chloride resin sheet-like flooring material. As is clear from the accelerated test results, there was no peeling, and it was confirmed that the expansion and contraction of the soft vinyl chloride resin sheet-like floor material was suppressed by the adhesive force, and there was no joint opening, partial peeling, warpage, or the like.

Example 6 Acrylic resin emulsion (solid content concentration: 60% by weight,
(Self-crosslinking type) was mixed and stirred with 100 parts by weight in terms of solid content and 40 parts by weight of calcium carbonate as a filler to prepare a main agent. Next, 5 parts by weight of an aziridine-based cross-linking agent was mixed with 100 parts by weight of the acrylic resin content in the base material, and the mixture was mixed and stirred to prepare an adhesive composition. Using this adhesive composition, a sample similar to that of Example 1 was prepared and the same test was conducted. The results are shown in Table 2.

Example 7 A sample was prepared in the same manner as in Example 6 except that the compounding amount of the aziridine crosslinking agent in Example 6 was changed to 10 parts by weight, and the same test was conducted. The results are shown in Table 2.

Example 8 A sample was prepared in the same manner as in Example 6 except that the amount of the aziridine crosslinking agent used in Example 6 was 20 parts by weight, and the same test was conducted. The results are shown in Table 2.

Example 9 A sample was prepared in the same manner as in Example 6 except that the amount of the aziridine crosslinking agent used in Example 6 was 30 parts by weight, and the same test was conducted. The results are shown in Table 2.

[0037]

[Table 2] When the adhesive composition for flooring material of the present invention shown in Examples 6 to 9 is used, a predetermined initial adhesive force and adhesive strength can be obtained, and moreover, the joint opening or part due to expansion and contraction of the soft vinyl chloride resin sheet-like flooring material. As is clear from the accelerated test results, there was no peeling, and it was confirmed that the expansion and contraction of the soft vinyl chloride resin sheet-like floor material was suppressed by the adhesive force, and there was no joint opening, partial peeling, warpage, or the like.

Comparative Example 1 The blending amount of the bisphenol A type epoxy resin emulsion (concentration of solid content: 50% by weight, epoxy equivalent: 520) was 0 part by weight in terms of solid content, and the blending amount of the imidazole-based curing agent was 0 part by weight. A sample was prepared in the same manner as in Example 1 except for the above, and the same test was performed. The results are shown in Table 3.

Comparative Example 2 The compounding amount of the bisphenol A type epoxy resin emulsion (solid content concentration: 50% by weight, epoxy equivalent: 520) was 4 parts by weight in terms of solid content, and the compounding amount of the imidazole curing agent was 0.9. A sample was prepared in the same manner as in Example 1 except that the weight part was used, and the same test was performed. The results are shown in Table 3.

Comparative Example 3 The compounding amount of the bisphenol A type epoxy resin emulsion (solid content concentration: 50% by weight, epoxy equivalent: 520) was 100 parts by weight in terms of solid content, and the compounding amount of the imidazole curing agent was 11.2 parts by weight. A sample was prepared in the same manner as in Example 1 except for the above, and the same test was performed. The results are shown in Table 3.

[0041]

[Table 3] When the composition amount of the composition having a functional group curable at room temperature is 4 parts by weight (less than 5 parts by weight) with respect to the solid content of the synthetic resin emulsion, the joint opening by the accelerated test is large, and It was slightly peeled off and lacked long-term adhesive strength as an adhesive. When the compounding amount of the composition having a functional group curable at room temperature was 62 parts by weight (60 parts by weight or more) in terms of solid content, the initial adhesive strength was lowered and the initial purpose could not be achieved.

Comparative Example 4 A sample was prepared in the same manner as in Example 6 except that the aziridine crosslinking agent was not added, and the same test was conducted. The results are shown in Table 4.

Comparative Example 5 A sample was prepared in the same manner as in Example 6 except that the compounding amount of the aziridine crosslinking agent was 3 parts by weight, and the same test was conducted. The results are shown in Table 4.

Comparative Example 5 A sample was prepared in the same manner as in Example 6 except that the amount of the aziridine crosslinking agent was 35 parts by weight, and the same test was conducted. The results are shown in Table 4.

[0044]

[Table 4] When the compounding amount of the aziridine-based cross-linking agent is 3 parts by weight (less than 5 parts by weight) relative to 100 parts by weight of the acrylic resin content in the main component, the joint opening after the acceleration test is large, and long-term adhesion after construction as an adhesive agent It lacked power sustainability.
Further, the compounding amount of the aziridine-based cross-linking agent is 35 parts by weight (30
In the case of more than parts by weight), the initial adhesive strength was lowered and the initial purpose could not be achieved.

[0045]

The adhesive composition for flooring of the present invention comprises a synthetic resin emulsion or synthetic rubber latex having excellent initial tackiness, and a composition having a functional group and / or a crosslinking agent. When installing floor materials, it is possible to easily install floor materials that are deformed during winding or transportation even at low temperatures in winter, and even if there is poor adhesion of the floor material (plow from the ground), it is easy to repair. (Repair is possible even after 2 weeks)
It has the effect of being In addition, the composition having a functional group curable at room temperature after construction and / or the cross-linking agent gradually reacts to strengthen the cohesive force of the adhesive layer, thereby expanding or contracting the flooring material due to temperature changes and aging for a long time. This has the effect of suppressing joint opening and the like due to changes. Therefore, it is extremely excellent as an adhesive for soft vinyl chloride resin sheet-like flooring materials and soft vinyl chloride resin tile-like flooring materials, which may cause problems such as shortening construction time, peeling after construction and joint opening. There is nothing.

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Claims (4)

[Claims] 1. An adhesive composition for flooring, which comprises a synthetic resin emulsion having an excellent initial tackiness and a composition having a functional group curable at room temperature and / or a crosslinking agent. 2. At least a synthetic resin emulsion having excellent initial adhesive strength is selected from self-crosslinking type or non-crosslinking type acrylic resin type emulsion, ethylene-vinyl acetate copolymer resin type emulsion, urethane resin type emulsion and synthetic rubber latex. The flooring adhesive composition according to claim 1, which is one or more kinds. 3. A composition having a functional group curable at room temperature comprises an epoxy resin, a compound having at least one methylol group in a molecule, a compound having an ethylenic double bond and a curing agent for these. The adhesive composition for flooring according to claim 1. 4. The adhesive composition for flooring according to claim 1, wherein the crosslinking agent is an initial condensation product of melamine or urea or an aziridine compound.