JPH05271632A - Adhesive for directly stickable flooring - Google Patents

Abstract

PURPOSE:To obtain an adhesive for a flooring fixed directly or through a buffer to a floor base such as a concrete slab of, e.g. a tenement house or a store. CONSTITUTION:This adhesive is a one-pack emulsion adhesive for directly sticking a flooring to a floor base, mainly consisting of an acrylic resin, and having a nonvolatile content of 10% or above, desirably 50 % or below and a viscosity of 5,000-50,000cP at 20 deg.C. Because the acrylic adhesive has the properties most suitable for the direct sticking of a flooring to a floor base, it can be applied in a thickness sufficient to cope with the roughness of the surface of a concrete slab and can provide good workability. Further it has a good balance among cost, handleability, etc., because of its specified nonvolatile content.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive used for a floor material fixed to a floor slab such as a concrete slab of an apartment house or a store directly or through a cushioning material.

[0001]

2. Description of the Related Art Recently, in a housing, particularly an apartment such as a condominium, a wood flooring material which has a clean feeling and is excellent in cleanability has been attracting attention, and its needs are increasing. Further, in order to enhance the soundproofing of the upper and lower floors, a floor material having a cushioning material on the lower surface is also used.

Generally, when the floor material is directly attached on the floor base, inspection of the slab surface, cleaning, floor allocation, marking and temporary arrangement, mixing of adhesive, application, pasting, setting, curing, finishing The process is adopted, but if the slab surface has irregularities,
The adhesive is thickly embedded in this recess. Therefore,
Needless to say, it is better to be as simple as possible because the viscosity at the time of applying the adhesive has a great influence, and even when preparing the adhesive, it is a work at the construction site.

Furthermore, it is preferable that the period of curing or the like after the flooring is stuck is short, and therefore it is not preferable to use an organic solvent. Furthermore, if the adhesive does not have a certain degree of flexibility after being cured, it will not be excellent in soundproofing performance and may cause floor squeal.

For the adhesion of such a floor material to a floor base such as a concrete slab, a two-liquid mixed type adhesive consisting of two liquids of an epoxy resin main material and a curing agent has been widely used.

[0005]

However, since the epoxy adhesive is used by mixing the two liquids at the work site, the mixing ratio is liable to be poor and the stirring is not liable to occur. Therefore, the adhesive strength is always stable. However, the adhesion between the floor material and the floor base is poor. In addition, since this type of epoxy adhesive contains an organic solvent, a stimulating odor due to the vaporization of the organic solvent remains in the room after the work is completed, and the room cannot be used immediately after construction. It was not suitable as an adhesive for use. Furthermore, after the epoxy-based adhesive is cured, the cured epoxy resin has poor flexibility, and when walking on the floor after construction, the epoxy resin may crack and cause flooring.

Furthermore, when a cushioning material is interposed between the floor base and the floor material for soundproofing, the adhesive may impregnate the interior of the cushioning material depending on the type of the cushioning material, In some cases, the sound insulation performance was degraded. In addition, in the case of epoxy-based adhesive, if it adheres to the surface of the flooring material and hardens at the time of construction, the floor surface may be scratched to attach it, and the surface coating may also be removed, It was also pointed out that there were some defects such as impairing the finished aesthetics.

[0007]

In the present invention, as a result of intensive studies to improve the drawbacks of conventionally used epoxy-based adhesives, an acrylic resin was used as the main component of the adhesive, and the resin properties By specifying the above, an adhesive suitable for adhering the floor material on the floor base is obtained. That is,
The gist of the present invention is to provide an adhesive for directly adhering a flooring material onto a flooring base, which contains acrylic resin as a main component and has a nonvolatile content of 1% or less.
0% or more, preferably 50% or less, and a viscosity of 5,000 to
1 characterized in that the temperature is 50,000 cps / 20 ° C.
The present invention relates to a liquid-type emulsion type adhesive for direct-adhesion flooring.

[0008]

In general, an adhesive containing an acrylic resin as a main component is mainly used as an adhesive for a soft sheet material such as carpet and has a relatively low viscosity. Therefore, if you use this as an adhesive for direct-adhesion flooring,
Since the adhesive cannot be applied thickly, a gap is created between the uneven (uneven) part of the concrete slab surface and the adhesive surface of the floor material, which causes floor squeal due to poor adhesion. The properties are those suitable for direct application of floor materials,
This is an adhesive that has improved the conventional drawbacks.

Generally, the main component of a one-pack type acrylic resin adhesive is generally methyl methacrylate, methacrylic acid-
It consists of a resin component such as 2-hydroxyethyl, an elastomer component such as NBR, a peroxide, and a polymerization accelerator.
It is a one-pack type in which a peroxide and a polymerization accelerator are microencapsulated.

The solvent used in the present invention is of the emulsion type and has a nonvolatile content (mainly acrylic resin content) of 10%.
% Or more, preferably 50% or less, which is 10%
Below is the disadvantage that the adhesive causes shrinkage, while
If it is 50% or more, no problem occurs as an adhesive,
If the amount is increased more than this, the effect is small, and therefore a cost problem arises. A particularly preferred range is
The nonvolatile content is 15 to 25%.

On the other hand, the viscosity of the adhesive is 5,000 to 50,
000 cps / 20 ° C, which is 5,000 cps
If it is / 20 ° C., the viscosity is too low to apply it thickly, and the uneven portion on the floor base is not filled and remains as it is. On the other hand, the viscosity is 50,000 cps / 20
On the contrary, when the temperature is higher than 0 ° C, the flow of the adhesive is small and the adhesive is hard as a direct-adhesive, which makes it inconvenient to handle.

The adhesive of the present invention has the above constitution 1
It is a liquid emulsion type that does not require mixing and stirring at the construction site, eliminating the adhesion failure that has occurred for this reason. Moreover, since the viscosity at the time of construction is optimally adjusted for direct application and the flexibility is maintained even after curing, the occurrence of floor squeal and the like after construction can be greatly reduced. Further, since the adhesive does not contain an organic solvent, there is no irritating odor even after the construction, and the habitability is not deteriorated even immediately after the construction.

Conventionally, an adhesive containing an acrylic resin as a main material has been used for adhering highly flexible sheets such as carpets, vinyl chloride sheets, and rubber sheets. Was 5,000 cps / 20 ° C. or less, but in the present invention, such an adhesive has the most suitable properties as an adhesive for direct bonding of floor materials, and in particular, its viscosity is 1
5,000 to 30,000 cps / 20 ° C is preferable.

[0014]

EXAMPLES The present invention will be described below in more detail with reference to specific examples. A 2-liquid type was prepared by mixing 2-hydroxyethyl methacrylate as a main component, NBR, methyl methacrylate, a peroxide, a polymerization accelerator and the like, and microcapsulating the peroxide and the polymerization accelerator. Furthermore, a proper amount of a thickener was added to adjust the viscosity of the adhesive to be 20,000 CPS / 20 ° C. This adhesive was applied thickly so that the concrete slab surface having irregularities was filled with the irregularities, and a floor material was attached.
No floor squeaking due to poor adhesion did not occur on the directly pasted floor after construction.

[0015]

EFFECTS OF THE INVENTION The present invention has the above-described properties of the acrylic adhesive which are most suitable for directly attaching the floor material to the floor base.
A thick coating that can be applied to the uneven surface of the concrete slab surface has become possible, and it is an adhesive with good workability.
Further, by defining the non-volatile content in the adhesive, it is possible to provide an adhesive that is well balanced in cost and handling.

Claims (2)

[Claims] 1. An adhesive for directly adhering a flooring material to a flooring base, comprising an acrylic resin as a main component and having a nonvolatile content of 10%.
% Or more, viscosity is 5,000 to 50,000 cps / 20
A one-pack emulsion type adhesive for direct-adhesion flooring, which is characterized in that the temperature is set to ℃ 2. The non-volatile content is 50% or less.
Adhesive according to item.