JP2003213887A - Construction method and construction structure of incombustible building material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of causing separation or lift at the surface layer of a plate body after construction due to the brittleness of the surface layer of the backing plate body and low inter-layer strength because of adopting a method of bonding an incombustible building material using the plate body such as a calcium silicate plate or a cement perlite plate, as a general construction method as incombustible structure is demanded for the interior wall of a kitchen, a cooking room, a building or the like. <P>SOLUTION: The brittleness of a backing plate body and low inter-layer strength are improved by applying a water reinforcing material, and a pressure sensitive adhesive double coated tape and an adhesive are jointly used to construct the incombustible building material. In this construction method, construction is simplified while realizing construction structure causing no separation nor lift after construction. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for constructing a non-combustible building material on a wall foundation and its construction structure.

[0002]

2. Description of the Related Art In accordance with building regulations, kitchens, kitchen rooms and inner walls of buildings are required to have a non-combustible structure, and tiles, non-combustible building materials, etc. are applied to a non-combustible base material such as mortar and non-combustible building materials to complete a non-combustible structure. ing. For these constructions, after discarding inorganic plate materials (hereinafter referred to as plate materials) such as calcium silicate plate and cement perlite board directly on the frame or through the furring strip, and then adhering to the surface of the plate material with an adhesive, mortar, etc. It was being done. However, these plate bodies have drawbacks such as being porous and brittle and easily chipped, and having a weak interlayer strength of the surface layer.Therefore, there is a problem that they peel off from the underlying portion after construction, and when they float, there are some problems. It was necessary to reinforce and use the body surface layer.

For this reason, a resin solution in which a resin such as urethane resin or epoxy resin is dissolved in an organic solvent is used as a reinforcing material for the surface layer, and the solution is applied to the surface of the plate body, penetrated and cured to reinforce it. Was being considered. However, since these are resin solutions that use organic solvents, there is a constant risk of fire during work, and because volatile solvents contaminate the work room and are unfavorable to the health of workers, they contain organic solvents. There has been a demand for a non-aqueous reinforcing material.

Further, a chloropre-rubber adhesive or the like has been conventionally used for adhering a non-combustible decorative material to the base plate. As is well known, it is necessary to apply the chloroprenecom adhesive on both surfaces to be bonded, and then to bond it after taking an open time, resulting in a long bonding work time, complicated work, skill required, etc. There was a problem. In addition, although a method of performing adhesive construction using resin mortar is also adopted, it is necessary to temporarily fix until the resin mortar solidifies, and temporary fixing must be removed after the adhesive has solidified. However, there are still problems such as complicated work and longer working time.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made as a result of extensive studies to solve such conventional problems and problems, and is a base plate in the construction of non-combustible building materials that has been conventionally carried out. In addition to solving the problems of the reinforcing material, that is, the danger of fire, pollution in the room, and the health problems of workers, there is a conventional construction problem, that is, a construction method that can obtain a good finish with simple work. To establish.

[0006]

In the present invention, as a measure for reinforcing the surface layer of the base plate, a water-based reinforcing material is applied to the surface of the plate for permeation, and cured to reinforce the surface layer.
By using a double-sided pressure-sensitive adhesive tape and an adhesive in combination, the above-mentioned construction problems, which were the conventional problems, are solved.

The base plate according to the present invention includes calcium silicate plate, pulp cement plate, gypsum board, wood wool cement plate, cement pearlite plate, cement calcium silicate plate, etc. When it is used as it is, the strength of the surface layer is insufficient, it is apt to be chipped, and there is a problem of peeling between layers. Therefore, in the present invention, a water-based reinforcing material is applied to the surface of the plate body for penetration and reinforcement, and a double-sided adhesive tape is attached to the back surface of the non-combustible building material, an adhesive is applied, and then bonded to the reinforced plate body. According to the construction method, a construction structure is provided which does not separate from the base plate or float from the joint.

For the aqueous reinforcing material according to the present invention, an emulsifying hydrophilic group-containing isocyanate prepolymer system or a self-emulsifying type prepolymer system having an isocyanate group at the terminal is used.

The emulsifiable hydrophilic group-containing isocyanate prepolymer is a polyisocyanate containing a polyether chain having ethylene oxide units chemically incorporated with a hydrophilically modified polyisocyanate. Examples of the emulsifiable hydrophilic group-containing isocyanate prepolymer include hexamethylene diisocyanate, tris 6 isocyanate hexyl isocyanate, and polymethylene polyphenyl isocyanate.

On the other hand, the emulsifying hydrophilic group is a nonionic surfactant obtained by adding ethylene oxide to a higher alcohol, the general formula of which is RO (CH2CH2O) nH,
Polyethylene glycol ether represented by (R is an alkyl group) is used. This type of aqueous reinforcing material is used in a state where 50 to 600 parts by weight of water is added to 100 parts by weight of the emulsifiable hydrophilic group-containing isocyanate prepolymer and diluted.

The self-emulsifying prepolymer having an isocyanate group at the terminal is formed by reacting a hexamethylene diisocyanate polymer with an alkoxy polyalkylene glycol, and the alkoxy polyalkylene glycol is R1 (O-R2-) nH, Here, R1 is a structure represented by an alkyl group, and R2 is a structure represented by an alkylene group, and the entire alkoxy group exerts a nonionic surfactant-like action, so that a self-emulsifying property is obtained. The self-emulsifying prepolymer can be synthesized by a known method without using a solvent.

The content of isocyanate groups in the self-emulsifying prepolymer is 15 to 24%, which is 15%.
In the following, the hydrophilicity becomes unnecessarily strong during emulsification and the stability tends to deteriorate, which is not preferable. If it is 24% or more, the hydrophilicity is insufficient, so that it is difficult to obtain a stable emulsified state, which is not preferable.

The self-emulsifying prepolymer is emulsified by adding 50 to 600 parts by weight of water to 100 parts by weight.
The water-dispersed product forms a polyurethane protective film on the polymer surface and can be kept in a state where the reaction between isocyanate groups and water can be suppressed, and a stable emulsified state can be maintained.

The aqueous reinforcing agent prepared in this manner penetrates from the surface when applied to the base plate and reacts with the water in the plate or the water permeated into the plate to crosslink inside the plate. The surface layer of the plate may be reinforced to form the structure. The applied product is preferably cured for several hours, and the curing allows the surface layer of the plate body to withstand the intended construction.

A non-combustible building material is applied to the base plate thus adjusted. In the present invention, a double-sided adhesive tape and an adhesive are used together to bond the plate and the non-combustible building material, and the double-sided adhesive tape is attached to the surface of the plate in a predetermined shape such as parallel or cross, and then the double-sided adhesive tape is attached. The construction is completed by applying an adhesive agent at a position between them and then applying a non-combustible building material.

As the non-combustible building material, a foam glass-based building material, a ceramic-based non-combustible building material using a calcium silicate material, a non-combustible building material in which an inorganic material and a resin and glass fiber are combined, and a metal-based non-combustible building material can be adopted. However, the cutting property at the construction site,
A non-combustible building material in which an inorganic material such as aluminum hydroxide, a thermosetting resin such as melamine resin, and a reinforcing fiber such as glass fiber are combined is preferable from the viewpoint of properties such as perforability and toughness.

As the double-sided adhesive tape, an adhesive resin is applied to a base material such as a non-woven fabric, a cloth, a foam, a film, or the like, preferably a foam having a moderate elasticity capable of expecting the followability to the unevenness of the plate. The processed one can be used. Polyurethane resin-based, polyethylene resin-based, ethylene
Foam such as vinyl acetate resin and polypropylene resin can be used. A material having a thickness of 0.5 to 5 mm is suitable for the foam. If it is less than 0.5 mm, it is not preferable because the ability of the plate body to follow unevenness is insufficient. If it is 5 mm or more, it is not suitable because it is difficult to obtain a construction finish for musical score building materials.

The foam is treated with an adhesive resin and processed into a double-sided adhesive tape. As the adhesive resin, acrylic resin type, urethane resin type, rubber latex type, modified silicone resin type and the like are adopted. Among them, acrylic resins are suitable because they have viscoelasticity and excellent adhesiveness.

As the adhesive, an adhesive having an appropriate elasticity such as a silicone resin type, a modified silicone resin type, or an elastic epoxy resin type is used. Non-combustible building material is fixed at a predetermined position of the plate when it is installed with a non-elastic adhesive, and even a slight movement is restricted.Therefore, there is no movement due to the dimensional change between the plate and the non-combustible building material. It is inevitable that the building material will crack.

As described above, when the non-combustible building material is adhered to the surface-reinforced plate body by the method for applying the non-combustible building material according to the present invention, first, the non-combustible building material is temporarily fixed to the plate body with the double-sided adhesive tape. However, the non-combustible building material is adhesively fixed by hardening or solidifying the adhesive, and the location of application of the double-sided adhesive tape, the location of application of the adhesive, the application method, etc. are selected according to the size, thickness, weight and shape of the non-combustible building material. To be done.

As the pasting shape of the double-sided adhesive tape, parallel pasting, cross pasting, box-like pasting, etc. are adopted, and the width between the double-sided adhesive tape may be determined in consideration of the shape, size, weight and the like of the non-combustible building material. Appropriate application methods such as an application method in which the adhesive is applied while being discharged from a nozzle such as a caulking gun and an application method in which the adhesive is applied with a trowel, a comb, etc. are adopted. The coating amount is selected by taking into consideration the thickness of the double-sided adhesive tape, the width of the double-sided adhesive tape, etc., but it is not necessary to have an adhesive on the entire joint surface between the plate surface and the non-combustible building material. It does not matter if there are cavities.

The present invention will be described below with reference to examples and comparative examples. Example 1 95 parts by weight of Coronate HX (hexamethylene diisocyanate polymer, NCO content 21.0% / manufactured by Nippon Polyurethane Industry Co., Ltd.) was charged into a container equipped with a thermometer, a stirrer, and a nitrogen introducing tube, and Nonipol 160 ( General formula / R
Hydroxyl number represented by _{O- (CH 2 CH 2 O)} nH 6
4 / Sanyo Kasei Co., Ltd.) 5 parts by weight was added and the temperature was raised to 70
A mixture of 350 parts by weight of water with 100 parts by weight of the self-emulsifying ethylene oxide-modified HDI isocyanate prepolymer reacted for 3 hours while maintaining at -80 ° C is mixed with a stirrer to prepare an emulsified aqueous reinforcing material. did. The amount of the water-based reinforcing material applied to the back surface of the underlying 5 mm-thick calcium silicate plate that was abandoned on the furring provided between the columns was 10
About 0 g / m ² was applied with a rubber roller and left for 5 hours for curing. Next, a double-sided adhesive tape prepared by applying an acrylic resin-based adhesive to a urethane foam body with a foaming ratio of 5 times is attached to a non-combustible decorative board (eyecasseral, thickness 3 mm) in the shape shown in FIG. A modified silicone type adhesive was extruded from a caulking nozzle and applied, and then the noncombustible decorative board was immediately attached to the surface of the calcium silicate board. When the state after the construction was observed for 6 months, no displacement of the nonflammable decorative board or peeling of the adhesive portion was observed.

Comparative Example 1 Construction was carried out in the same manner as in Example 1 except that the aqueous reinforcing agent was not applied. When the appearance of the bonded portion was observed for 3 months to 1 year after the construction, surface peeling occurred on a part of the calcium silicate plate, and the nonflammable decorative plate was observed to float.

Comparative Example 2 The non-combustible decorative plate was attached to the same base as in Example 1 after the double-sided pressure-sensitive adhesive tape was attached in the shape of FIG. 1, and then the non-combustible decorative plate was attached to the base. As a result of observing the adhesion state for 6 months after the construction, a slight deviation was observed and a part was observed to be floating.

Comparative Example 3 To bond the non-combustible decorative board to the same base as in Example 1, a chloroprene rubber adhesive was applied to the surface of the base and the back surface of the non-combustible decorative board with a brush, After providing an open time and drying, the nonflammable decorative board was adhered to the base. The work environment was a problem because the odor of the organic solvent filled the work room, and a difficulty was found in workability.

[0026]

According to the construction method of the present invention, the surface of the plate used as the construction base of the non-combustible building material is coated with a water-based reinforcing material, and the non-combustible building material is coated on the surface layer to reinforce the surface layer. Because it is used in combination with an adhesive,
Peeling from the base plate, which has been a problem in the past, floating, etc. are eliminated, and the construction work that was a problem in the pasting work of non-combustible building materials using adhesives and mortar is complicated,
It was possible to solve problems such as long bonding work time and skill required. Furthermore, when a non-combustible building material in which a workable inorganic material having excellent workability as a non-combustible building material, thermosetting resin, glass fiber, etc. is used, cracks during construction of the non-combustible building material, which has been a problem so far, Since there is no chipping or the like and construction is easy, construction work can be performed easily and quickly.

[Brief description of drawings]

FIG. 1 is a state diagram in which a double-sided adhesive tape 2 is attached to the back surface of a non-combustible building material 3 and an adhesive 1 is applied.

[Explanation of symbols]

1 adhesive 2 double-sided adhesive tape 3 non-combustible building materials

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2E110 AA02 AA42 AB04 AB22 AB23                       BA03 BB07 DC23 GA03Z                       GA24W GA29Z GA33Y GA42W                       GB16Y GB23Y GB42W GB42Z                       GB43W GB45W

Claims (2)

[Claims] 1. A non-combustible material characterized by applying a water-based reinforcing material to the surface of a plate used as a substrate, infiltrating and curing the same, and then adhering a non-combustible building material to the plate with a double-sided adhesive tape and an adhesive. Construction method of building materials. 2. A construction structure characterized in that a non-combustible building material is adhered to a base plate on which a water-based reinforcing material is applied, permeated and cured by a double-sided adhesive tape and an adhesive.