JP2000154637A - Floor structural body and its execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a floor squeaking or thermal degradation of a warm water pipe by laminating a floor material and floor heating unit with a modified silicone adhesive made up by adding silanol curing catalyst or the like to a modified silicone polymer. SOLUTION: The floor structural body is formed by laminating a floor material and floor heating unit with a modified silicone adhesive, which is made up by adding various kinds of additives to a modified silicone polymer, and whose tensile strength is 15 kg/cm2 or more at a rupture time of cured matter, elongation is 100% or more, and permanent extension is less than 50%. A floor material may preferably be formed by adhering a floor substrate material to floor finishing material with a silicone adhesive. A nozzle having a plurality of ejection ports in a cartridge vessel may also be used to enable application in a plurality of beads by one application. Furthermore, it is preferable that a sylanol curing catalyst comprising bivalent organic carboxylic tin and the like is added by 0.1-10 pts.wt. Occurrence of a squeaking can thereby be prevented, and also thermal degradation of the crosslinked polyethylene pipe of a warm water pipe can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure and a construction method thereof.

[0002]

2. Description of the Related Art Recently, when a flooring material and a floor finishing material are laminated on a flooring material, not only a hardened adhesive such as an epoxy adhesive or a vinyl acetate resin-based adhesive, but also a modified silicone A flexible adhesive whose cured film has rubber elasticity like a system adhesive is used. By using such a flexible adhesive having rubber elasticity, it is possible to prevent floor noise which has conventionally been a problem. The floor noise refers to a sound generated from the floor material when a person or the like steps on the floor material while walking.

[0003] However, if the above-mentioned cured film is bonded to a floor material of a floor heating specification using a flexible adhesive, for example, there is a problem that the floor finish material shrinks in winter to cause a gap. A hard adhesive having a hardened film is used.

[0004] However, when a hard adhesive having the above-mentioned cured film is used, stress is generated and stress concentration occurs due to a difference in linear expansion coefficient, and cracks and breakage may occur in members constituting the floor, thereby causing However, there is a problem that floor noise occurs.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a method of bonding a floor material to a floor heating unit, a floor base material and a floor finishing material using a modified silicone adhesive. It is an object of the present invention to provide a floor structure and a construction method thereof in which floor noise does not occur because no gap is generated due to shrinkage.

[0006]

A floor structure according to the present invention is characterized in that a floor material and a floor heating unit are laminated with a modified silicone-based adhesive.

The modified silicone adhesive used in the present invention is an adhesive obtained by adding various additives to a modified silicone polymer. As the modified silicone polymer,
Those having a main chain of polyoxyalkylene and having a crosslinkable hydrolyzable silyl group at the terminal are used.

[0008] The modified silicone polymer is, for example,
It can be obtained by reacting a polyoxyalkylene having an allyl group at a terminal with a silicon hydride compound represented by the following general formula (3) in the presence of a group VIII transition metal.

[0009]

Embedded image

In the formula, R represents a monovalent hydrocarbon group or a halogenated monovalent hydrocarbon group; Z represents a halogen atom, an alkoxy group, an acyloxy group or a ketoximate group; Indicates 1 or 2.

The polyoxyalkylene which is the main chain of the modified silicone polymer includes, for example, polyoxyethylene, polyoxypropylene, polyoxybutylene and the like. Currently, those which are polyoxypropylene are generally commercially available. I have. As the crosslinkable hydrolyzable silyl group, for example, a methoxysilyl group is preferable.

The modified silicone polymer has a molecular weight of
It is preferably from 4,000 to 30,000, and more preferably from 10,000 to 30,000. The molecular weight distribution (weight average molecular weight / number average molecular weight) is preferably 1.6 or less.

Commercially available modified silicone polymers having a main chain of polyoxypropylene, such as "MS-Polymer S-203" manufactured by Kaneka Chemical Industry Co., Ltd.
“MS-Polymer S-303”, “MS-Polymer S-
MS-polymer such as “903”; “Silyl SAT-20”
0 "," Cyril MA-430 "," Cyril MAX-
447 "," Cyril SAT-350 "," Cyril S "
AT-400 and other silyl polymers; "Exester ESS-3620" and "Exester ESS" manufactured by Asahi Glass Co., Ltd.
-3430 "," EXETER ESS-2420 ",
"Exester ESS-2410" and the like.
These modified silicone polymers may be used alone or in combination of two or more.

[0014] If necessary, a curing catalyst may be added to the modified silicone polymer. The curing catalyst,
The silanol condensation catalyst, which is used for accelerating the moisture curing reaction of the modified silicone polymer and is conventionally used as a curing catalyst for the modified silicone polymer, is preferable.

Examples of the silanol condensation catalyst include dibutyltin dilaurate, bis (dibutyltin lauric acid) oxide (for example, product name “SB-65” manufactured by Sankyoki Seisakusho Co., Ltd.), dibutyltin oxide, dibutyltin dilaurate. Acetate, dibutyltin phthalate, dibutyltin bisacetylacetonate, dibutyltin bis (monoester malate), tin octylate, dibutyltin octoate,
Tin compounds such as dioctyltin oxide; titanate compounds such as tetra-n-butoxytitanate and tetraisopropoxytitanate; amine salts such as dibutylamine-2-ethylhexoate; and other acidic and basic catalysts. These may be used alone or in combination of two or more.

The amount of the curing catalyst is preferably in the range of 0.1 to 5 parts by weight based on 100 parts by weight of the modified silicone polymer.

Examples of the curing co-catalyst for improving curability include silane compounds and amine compounds. Examples thereof include ketoxime silane; alkoxysilane; amino-substituted alkoxysilane such as aminoxysilane and amidosilane; lauryl. Amines or their derivatives,
It may be used in combination with a curing catalyst.

However, when a crosslinked polyethylene pipe is used as a hot water pipe of a hot water unit for floor heating, attention must be paid to the curing catalyst used. That is, depending on the configuration of the hot water unit, the modified silicone-based adhesive may adhere to the crosslinked polyethylene pipe, which may cause thermal deterioration of the crosslinked polyethylene pipe. Therefore, in order to prevent thermal deterioration of the crosslinked polyethylene tube, a divalent organic tin carboxylate and a silanol curing catalyst represented by the following general formula (1) or the following general formula (2) are contained in the modified silicone adhesive. Is preferred. (X) ₂ Sn (OSiY ₃ ) ₂ (1) (OSiY ₃ ) (X) ₂ SnOSn (X) ₂ (OSiY ₃ ) (2) In the formula, X represents a monovalent hydrocarbon group, and Y represents alkoxy. Represents a group. X is preferably a butyl group, an octyl group or a stearyl group, and Y is preferably a methoxy group, an ethoxy group or a butoxy group.

Examples of the divalent organic tin carboxylate include tin stearate and stannas octoate.
Examples of the curing catalyst represented by the general formula (1) or (2) include dibutyltin bistriethoxysilicate, dibutyltin bismethoxysilicate, and the like. The addition amount of the silanol curing catalyst is 0.1
It is preferably from 10 to 10 parts by weight. If it is less than 0.1 part by weight, the function as a catalyst may not be sufficient,
If it exceeds 10 parts by weight, the curing speed may be higher than the speed suitable for the operation.

In some cases, the heat of the floor heating is retained and the area around the unit becomes hot, which may cause the modified silicone adhesive to thermally deteriorate. In order to prevent thermal deterioration of the modified silicone adhesive, an antioxidant of 0.5 to 10 parts per 100 parts by weight of the modified silicone polymer is used.
It is preferable that parts by weight be contained in the modified silicone adhesive. Examples of the antioxidant include hindered phenol and hindered amine. The addition amount of the antioxidant is preferably 0.5 to 10 parts by weight. If the amount is less than 0.5 part by weight, the effect of reducing thermal degradation is small, and if it exceeds 10 parts by weight, even if the amount of addition is increased, no remarkable improvement in the effect of reducing thermal degradation is not observed.

When the floor heating unit is heated to a high temperature, the adhesive is considered to be thermally degraded.
Hindered phenol 0.5 to 1 to 100 parts by weight
It is more preferable to add an antioxidant composed of a mixture of 0 parts by weight, 0.5 to 10 parts by weight of a hindered amine and 0.5 to 10 parts by weight of benzotriazole.
The amount of the hindered phenol, hindered amine and benzotriazole is preferably 0.5 to 10 parts by weight. If the amount is less than 0.5 part by weight, the effect of reducing thermal degradation is small, and if it exceeds 10 parts by weight, even if the amount of addition is increased, no remarkable improvement in the effect of reducing thermal degradation is not observed. In the modified silicone polymer, if necessary,
An adhesiveness-imparting agent, a dehydrating agent, a filler, a plasticizer, an anti-sagging agent and the like may be added.

As the above-mentioned adhesiveness-imparting agent, a compound having an amino group and an alkoxysilyl group in one molecule is used for improving the adhesive performance. Examples of the compound include 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldimethoxysilane, 3-aminopropyltriethoxysilane, and N- (2-aminoethyl)-
3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltriethoxysilane, N, N'-bis- [ 3- (trimethoxysilyl) propyl] ethylenediamine, N, N '
-Bis- [3- (triethoxysilyl) propyl] ethylenediamine, N, N'-bis- [3- (methyldimethoxysilyl) propyl] ethylenediamine, N, N'-
Bis- [3- (trimethoxysilyl) propyl] hexamethylenediamine, N, N′-bis- [3- (triethoxysilyl) propyl] hexamethylenediamine,
N'-bis- [3- (methyldimethoxysilyl) propyl] hexamethylenediamine, N, N-bis- [3-
(Trimethoxysilyl) propyl] ethylenediamine,
N, N-bis- [3- (methyldimethoxysilyl) propyl] ethylenediamine, N, N-bis- [3- (triethoxysilyl) propyl] ethylenediamine, N, N
-Bis- [3- (trimethoxysilyl) propyl] hexamethylenediamine, N, N-bis- [3- (methyldimethoxysilyl) propyl] hexamethylenediamine,
N, N-bis- [3- (triethoxysilyl) propyl] hexamethylenediamine, N, N-bis- [3-
(Trimethoxysilyl) propyl] amine, N, N-bis- [3- (triethoxysilyl) propyl] amine,
N, N-bis- [3- (methyldimethoxysilyl) propyl] amine and the like may be used, and these may be used alone or in combination of two or more.

The above-mentioned dehydrating agent is used for removing moisture penetrating into the modified silicone adhesive during storage. Examples of the dehydrating agent include silane compounds such as vinyltrimethoxysilane, dimethyldimethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, and tetramethoxysilane; methyl orthoformate, ethyl orthoformate, methyl orthoacetate ,
Hydrolysable ester compounds such as ethyl orthoacetate may be used, and these may be used alone or in combination of two or more.

The above-mentioned filler is used for the purpose of reinforcing the denatured silicone adhesive, for example, calcium carbonate,
Magnesium carbonate, calcium oxide, hydrous silicic acid, anhydrous silicic acid, finely divided silica, calcium silicate, titanium dioxide, clay, talc, carbon black, glass balloon, and the like, which may be used alone,
Two or more kinds may be used in combination.

The plasticizer is used to increase the elongation of the cured product of the modified silicone adhesive. Examples of the plasticizer include phosphates such as tributyl phosphate and tricresyl phosphate; phthalates such as dioctyl phthalate; monobasic esters of fatty acids such as glycerin monooleate; dibutyl adipate and dioctyl adipate; Fatty acid dibasic acid esters; and polypropylene glycol, and these may be used alone or in combination of two or more.

Examples of the anti-sagging agent include hydrogenated castor oil, fatty acid bisamide, fumed silica and the like.

The modified silicone-based adhesive may further include an antioxidant, an ultraviolet absorber, a pigment, a fragrance,
A solvent (for example, xylene) may be added.

The modified silicone-based adhesive comprises a modified silicone polymer, a curing catalyst, and, if necessary, a curing cocatalyst, an adhesion-imparting agent, a dehydrating agent, a plasticizer, an anti-sagging agent, a filler, an aging agent. It is obtained by mixing predetermined amounts of an inhibitor, an antioxidant, an ultraviolet absorber, a pigment, a fragrance, a solvent, and the like, and kneading them with a roll, a planetary mixer, or the like.

The modified silicone-based adhesive is a one-pack type,
Any prescription of a two-pack type is possible, but a one-pack type is preferred from the viewpoint of easy construction.

When the above-mentioned modified silicone adhesive is of a one-pack type, it cures when it comes into contact with moisture in the air. Therefore, as a one-pack type filled container, it is necessary to prevent the progress of the curing reaction due to moisture. What can block and seal the adhesive from the outside air is required. For example, various types of cartridge containers and film containers conventionally used in the field of sealing materials can be used.

The cured product of the modified silicone adhesive is
It is preferable to have a somewhat high elastic modulus. High elastic modulus prevents the occurrence of internal stress due to the difference in linear expansion coefficient,
A product excellent in adhesion, heat resistance, water resistance, durability and the like can be obtained.

Examples of the method for increasing the elastic modulus include (a) increasing the number of cross-linking points in the modified silicone polymer, and (b) adding a filler for increasing the elastic modulus.
(C) adding an epoxy resin or an acrylic compound,
(D) Utilizing a silane coupling agent for increasing the modulus of elasticity.

In the above method (a), “Silyl SAT-35” manufactured by Kanegafuchi Chemical Co., Ltd. is used as the modified silicone polymer.
0, Cyril SAT-400, Exeter ESS-3630 manufactured by Asahi Glass Co., Ltd. or the like.

In the above method (b), it is preferable to use, for example, various whiskers, cement, silica and the like as the filler for increasing the elastic modulus. In addition, an epoxy resin may be used to exhibit high durability.

Preferred examples of the modified silicone adhesive include, for example, a polyoxypropylene main chain, a crosslinkable hydrolyzable silyl group at a terminal, and a number average molecular weight of 6,000 to 30. The compound having an amino group and an alkoxysilyl group in one molecule is 0.2 to 2 parts by weight based on 100 parts by weight of the modified silicone polymer
0 parts by weight, 0.1 to 10 parts by weight of silanol condensed compound and 10 to 200 parts by weight of cement.

The modified silicone-based adhesive is J
In a tensile test measured in accordance with IS K6301 (vulcanized rubber physical test method, use of No. 3 dumbbell), when the cured product is broken, the tensile strength is 15 kg / cm ² or more and the elongation is 100% or more; And a permanent elongation of 50
% Is preferable. Tensile strength is 15kg / c
If it is less than m ² , there may be gaps in the floor material, and the elongation is 1
If it is less than 00% and the permanent elongation is more than 50%, floor noise may occur.

The viscosity of the modified silicone-based adhesive was measured by a Brookfield viscometer using a rotor NO. As a value measured at a rotation speed of 10 rpm by using 6, a range of 50,000 to 600,000 MPa is preferable. When the viscosity is less than 50,000 MPa, a large amount of coating is required, and when the viscosity exceeds 600,000 MPa, workability deteriorates.

The thixotropic property of the modified silicone-based adhesive is determined by a viscosity ratio (1 rpm / 10 rpm viscosity) of a viscosity measured at a rotation speed of 1 rpm and a viscosity measured at a rotation speed of 10 rpm in a Brookfield viscometer. If the viscosity ratio is less than 3, it may not be possible to secure a sufficient adhesive area during construction, so it is preferably 3 or more.

The floor structure of the present invention is obtained by bonding a floor material and a floor heating unit using the above-mentioned modified silicone adhesive. When constructing this floor structure, for example, a modified silicone-based adhesive is applied on a floor heating unit, and a floor material is superimposed and adhered thereon. The adhesive is usually filled in a cartridge container equipped with a nozzle, and a method of applying pressure while applying to the cartridge container and extruding it from the tip of the nozzle during use is generally adopted.

The nozzle mounted on the cartridge container is usually provided with one discharge port, so that one bead can be applied by one application. In addition, by using a nozzle provided with a plurality of discharge ports, it is possible to apply a plurality of beads in a single application. Further, the floor material in the floor structure of the present invention may be a floor finish material and a floor base material bonded with a modified silicone-based adhesive, and the coating method is applied at the time of the bonding. Is also good. Therefore, FIG.
As shown in (a), it can be applied simultaneously on the floor base material and the tongue.

Examples of the floor finishing material include plywood,
Wood flooring such as MDF, tile, vinyl chloride sheet, stone and the like are used. Further, as the floor base material, for example, plywood, wood joists, gypsum board, slate board,
Concrete or the like is used.

In the floor structure of the present invention, a floor heating unit may be sandwiched between a floor finishing material and a floor base material, or a heating element may be a softwood plywood or a floor base material. A floor heating unit panelized by Lauan plywood may be used, or a floor heating unit may be stacked on the lower surface of the floor base material.

[0043]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention and comparative examples will be described. (Example 1) Modified silicone polymer (manufactured by Kaneka Corporation)
Product name "Syril SAT-400", number average molecular weight 2
10,000) 100 parts by weight, 90 parts by weight of colloidal calcium carbonate (trade name "CCR" manufactured by Shiraishi Industry Co., Ltd.) as a filler,
Vinyltrimethoxysilane as a dehydrating agent (manufactured by Chisso,
Product name "Sila Ace S210") 4 parts by weight, N-
(2-aminomethyl) -3-aminopropylmethyldimethoxysilane (trade name “KBM-60” manufactured by Shin-Etsu Chemical Co., Ltd.)
2)) A reaction product of 3 parts by weight of 1 part by weight of 3-glycidoxypropyltrimethoxysilane and 20 parts by weight of Portland cement are mixed and vacuum kneaded with a planetary mixer for about 60 minutes to form a modified silicone adhesive. Agent (A)
After that, it was sealed and filled in a paper cartridge container.

The adhesive (A) was evaluated as follows, and the results are shown in Table 1. (1) Elongation A tensile test was performed with a No. 3 dumbbell in accordance with JIS K6301, and the elongation at break of the cured product was measured. (2) Permanent Elongation A tensile test was performed with a No. 3 dumbbell in accordance with JIS K6301, and the permanent elongation at break of the cured product was measured. (3) Viscosity The viscosity at 23 ° C. and 10 rpm was measured using a Brookfield viscometer (using rotor No. 6). (4) Thixotropy Using a Brookfield viscometer (using rotor No. 6), at 23 ° C., 1 rpm and 10 rpm.
m, and the viscosity ratio (1 rp)
m viscosity / 10 rpm viscosity).

(5) Eye gap test Softwood plywood (20 mm thick x 30 mm) dried at 60 ° C for 1 week
As shown in FIG. 1A, the adhesive (A) was applied in the form of four 6 mm wide beads in the short direction of 0 mm × 600 mm), and then two floor materials (300 mm) were placed on the softwood plywood.
Corners) to form a test body. This specimen was
After curing at 65 ° C. and 65% RH for 2 weeks, as shown in FIG. 1 (b), nailing was performed on the four corners of each floor material to fix the floor material, followed by heating at 60 ° C. for one week. The width of the gap generated between the two floor members was measured.

(6) Floor noise test Floor material (Eidai Sangyo, 12 mm thick ×
303 mm × 450 mm, ← → indicates fiber direction) and 20 mm thick floor warm panel (conifer plywood,
20mm thickness x 400mm x 500mm, ← → indicates the fiber direction), and as shown in Fig. 2 (a), adhesive is applied so as to have an interval of 303mm (central distribution) in the short direction on the floor base material. After applying the agent (A) in the form of two 6 mm wide beads, a floor finishing material is laminated thereon, and the pressure is applied once to spread out the adhesive (A). A 10 kg weight was placed and pressed to prepare a test body.
After curing this specimen at 20 ° C. and 65% RH for 2 weeks,
As shown in FIG. 2 (b), when the floor material was supported at two points and a bending stress of 500 mm / min was applied to the center and a displacement of 3 mm was given, no floor noise was generated. ,
Those that caused floor noise were indicated by x.

Comparative Example 1 Using Sekisui Chemical's “Sekisui Modified Silicone Sealant LM”, Example 1
The same tests as those described above were performed, and the results are shown in Table 1.

(Comparative Example 2) The same test as in Example 1 was performed using a vinyl acetate solvent-type adhesive "for Sekisui Bond wood brick" manufactured by Sekisui Chemical Co., Ltd., and the results are shown in Table 1.

Example 2 100 parts by weight of a modified silicone polymer (manufactured by Asahi Glass Co., Ltd., trade name "Exsester ESS3630", number average molecular weight: 20,000), an antioxidant (trade name "Tominox TT" manufactured by Yoshitomi Pharmaceutical Co., Ltd.) 2) parts by weight, dioctyl phthalate (Sekisui Chemical Co., Ltd.) 40 as a plasticizer
Parts by weight, 130 parts by weight of colloidal calcium carbonate (trade name "CCR" manufactured by Shiraishi Industry Co., Ltd.) as a filler, 4 parts by weight of vinyltrimethoxysilane (trade name "Sila Ace S210" manufactured by Chisso Corporation) as a dehydrating agent and N- (2-aminomethyl) -3-aminopropyltrimethoxysilane (trade name “KBM-60” manufactured by Shin-Etsu Chemical Co., Ltd.)
3 ") 2 parts by weight are blended and about 6 parts are mixed with a planetary mixer.
After the modified silicone adhesive (B) was obtained by vacuum kneading for 0 minutes, the mixture was sealed in a paper cartridge container. Next, after a four-hole nozzle having four discharge ports is attached to the paper cartridge container, as shown in FIG.
Was applied in the form of four 2 mm wide beads to the floor base material and the tongue portion, and a finishing material was adhered thereon as shown in FIG. 3B to obtain a floor material specimen. In addition, the adhesive (B) could be simultaneously applied to the floor base material and the tongue portion by one application.

Comparative Example 3 The procedure of Example 2 was repeated, except that the adhesive (B) of Example 1 was applied in the form of a 6 mm wide bead using a one-hole nozzle having one discharge port. A flooring specimen was obtained. The adhesive (B) could not be simultaneously applied to the floor base material and the tongue.

The test pieces of Example 2 and Comparative Example 3 were subjected to the same eye gap test as in (5) above, and the results are shown in Table 1.

[0052]

[Table 1]

(Example 3) Modified silicone polymer 10
A floor structure was prepared in the same manner as in Example 1, except that 2 parts by weight of dibutyltin bistriethoxysilicate was added to 0 parts by weight to prepare a modified silicone-based adhesive.

(Example 4) Modified silicone polymer 10
Except for adding 2 parts by weight of stannas octoate to 0 parts by weight to prepare a modified silicone-based adhesive,
A floor structure was produced in the same manner as in Example 1.

(Example 5) Modified silicone polymer 10
A floor structure was prepared in the same manner as in Example 1, except that 5 parts by weight of an antioxidant (trade name: Sumilizer BP101) was added to 0 part by weight to prepare a modified silicone-based adhesive.

(Example 6) Modified silicone polymer 10
To 2 parts by weight of an antioxidant (trade name Sumilizer BP101), 2 parts by weight of an antioxidant (trade name Sanol LS770) and 2 parts by weight of an antioxidant (trade name Tinuvin 327) are added to 0 parts by weight to denature. A floor structure was produced in the same manner as in Example 1 except that the silicone-based adhesive was adjusted.

(Deterioration Test of Crosslinked Polyethylene Pipe) A modified silicone adhesive was applied to a crosslinked polyethylene pipe (trade name “Eslopex”, manufactured by Sekisui Chemical Co., Ltd.), and the temperature was changed to 20 ° C. and 65%
After curing with RH for one week, the resultant was subjected to a heat treatment in an oven at 140 ° C. for 800 hours, and then the deterioration state was subjected to a sensory evaluation. Evaluation Criteria ○ No abnormality × Brittle and easily torn pipes For the specimens of Examples 3 to 5 and Comparative Example 1, a deterioration test of a crosslinked polyethylene pipe was performed, and the sensory evaluation results were shown in Table 2.
Summarized in

[0058]

[Table 2]

(Adhesive Deterioration Test) The modified silicone adhesive was cured at 20 ° C. and 65% RH for one week to obtain a cured sheet having a thickness of 3 mm. 140 ° C
After the heat treatment in an oven, the deterioration state was sensory evaluated. Evaluation criteria ○ No abnormality × Fragile, collapsed when touched ×× Many cracks occurred. Large weight loss. The cured products of Examples 5 and 6 and Comparative Example 1 were subjected to a deterioration test, and the results of sensory evaluation are summarized in Table 3.

[0060]

[Table 3]

[0061]

The flooring material of the present invention is as described above. Even if the flooring material is applied to the floor heating unit using a modified silicone adhesive, stress generation and stress concentration due to the difference in the coefficient of linear expansion will occur. Further, since no gap occurs due to contraction of the floor material, floor noise can be prevented. In addition, by applying the modified silicone adhesive using a nozzle having a plurality of discharge ports, it is possible to apply a plurality of beads in a single application, so that the gap due to shrinkage of the floor material is suppressed. Therefore, floor noise can be prevented. Furthermore, when a cross-linked polyethylene pipe is used as a hot water pipe of a hot water unit for floor heating, the modified silicone adhesive adheres to the cross-linked polyethylene pipe by using a specific curing catalyst and an antioxidant alone or in combination. Even though the crosslinked polyethylene tube does not undergo thermal deterioration. Furthermore, by using a specific antioxidant in combination, the modified silicone-based adhesive used for the floor structure does not deteriorate even when exposed to a high temperature state.

[Brief description of the drawings]

FIG. 1A is a schematic diagram showing a state in which a denatured silicone-based adhesive is applied in a bead shape on a softwood plywood (floor base material) in a test piece for an eye gap test, and FIG. B)
FIG. 2 is a schematic diagram showing a state in which a floor material (floor finishing material) is fixed on a softwood plywood (floor base material).

FIG. 2 (a) shows a floor noise test specimen,
FIG. 2 is a schematic view showing a state in which a floor material (floor finishing material) is laminated on a softwood plywood (floor base material) using a modified silicone-based adhesive, and FIG. It is a schematic diagram which shows the state which laminated | stacked the floor material (floor finishing material).

FIG. 3A is a schematic diagram showing a state in which a modified silicone-based adhesive is applied in a bead shape using a nozzle having four discharge ports, and FIG. It is a schematic diagram which shows the state which laminated | stacked the floor material on the floor base material by adhesion | attachment.

Claims (9)

[Claims] 1. A floor structure wherein a floor material and a floor heating unit are adhered with a modified silicone-based adhesive. 2. A modified silicone adhesive according to JIS
The cured product having a bond strength of 15 kg / cm ² or more, an elongation of 100% or more, and a permanent elongation of 50% or less according to a measuring method according to K6301 is used. 2. The floor structure according to 1. 3. The floor structure according to claim 1, wherein the floor material is formed by bonding a floor base material and a floor finishing material with a modified silicone adhesive. 4. The modified silicone adhesive according to claim 1, wherein the modified silicone adhesive is applied from a nozzle having a plurality of discharge ports when the modified silicone adhesive is used. The construction method of the described floor structure. 5. The modified silicone adhesive contains a divalent organic tin carboxylate and a silanol curing catalyst represented by the following general formula (1) or (2). The floor structure according to any one of claims 3 to 3. (X) ₂ Sn (OSiY ₃ ) ₂ (1) (OSiY ₃ ) (X) ₂ SnOSn (X) ₂ (OSiY ₃ ) (2) In the formula, X is a monovalent hydrocarbon group, and Y is an alkoxy group. Show. 6. The modified silicone-based adhesive contains 0.1 parts by weight of a divalent organic tin carboxylate and a silanol curing catalyst represented by the general formula (1) or (2) per 100 parts by weight of the modified silicone polymer. The floor structure according to claim 5, which is blended in an amount of from 10 to 10 parts by weight. 7. The modified silicone adhesive, wherein a divalent organic tin carboxylate and a silanol curing catalyst represented by the following general formula (1) or (2) are contained in the modified silicone adhesive. The method for constructing a floor structure according to item 1. (X) ₂ Sn (OSiY ₃ ) ₂ (1) (OSiY ₃ ) (X) ₂ SnOSn (X) ₂ (OSiY ₃ ) (2) In the formula, X represents a monovalent hydrocarbon group, and Y represents alkoxy. Represents a group. 8. The modified silicone adhesive according to claim 1, wherein 0.5 to 10 parts by weight of an antioxidant is contained in 100 parts by weight of the modified silicone polymer.
The floor structure according to any one of claims 1 to 3, or claim 5 or claim 6. 9. A composition comprising 0.5 to 10 parts by weight of a hindered phenol, 0.5 to 10 parts by weight of a hindered amine and 0.5 to 10 parts by weight of benzotriazole based on 100 parts by weight of the modified silicone polymer. The floor structure according to any one of claims 1 to 3, or 5 or 6, wherein an antioxidant comprising a seed mixture is contained in the modified silicone adhesive.