JP2000120257A - Floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor structure which is hard to generate noise by laminating a sound insulation sheet between a floor material and a floor substrate and an elastic material layer between the floor material and/or the floor substrate. SOLUTION: An uncured modified silicone-based adhesive to prepare an elastic material layer 4 is evenly applied on a floor substrate 2 so that the thickness after setting is as thick as 0.1-10 mm. Thereafter, a sheet 3 having a sound insulating property is attached with pressure. Further, an uncured modified silicone-based adhesive is evenly applied thereon so that the thickness after setting is as thick as 0.1-10 mm. Thereafter, a floor material is attached with pressure thereon. In this way, since an elastic material layer having 50% or more in the elongation at break in a tensile test and 10% or less in the permanent elongation in a permanent elongation test, made of a modified silicone-based adhesive is laminated between the floor material and the floor substrate material, the elastic material layer sufficiently absorbs stresses generating when the floor structural body is deformed and hence, no creaking noise arises and since a sound insulation sheet is put between them, noise is prevented all the more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a floor structure,
More specifically, the present invention relates to a floor structure that does not generate noise when walking.

[0002]

2. Description of the Related Art In recent years, floor finishing by flooring has rapidly spread. Conventional floor structures are composed of a flooring material and a flooring material, both of which are joined by a mechanical method such as a nail or a material such as an epoxy resin or a vinyl acetate resin between the flooring material and the flooring material. It was common to laminate a hard resin. However, in a conventional floor structure by mechanical bonding or a floor structure in which hard resin is laminated between a floor material and a floor base material, when a person walks on the floor or an object falls on the floor, However, there was a problem that noise was transmitted from the upper floor to the lower floor.

On the other hand, Japanese Unexamined Patent Publication (Kokai) No. 62-13649 discloses a structure using urethane or the like as a floor structure having elastic cushioning properties. However, the noise level had not been eliminated yet.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to generate noise when a person walks on the floor or an object falls on the floor. An object of the present invention is to provide a floor structure.

[0005]

According to the present invention, there is provided a floor structure comprising:
In a floor structure including a floor material and a floor base material on a floor or higher, a sound insulating sheet is sandwiched between the floor material and the floor base material, and the sound insulating sheet and the floor material And / or an elastic layer made of a modified silicone-based adhesive is laminated between the base material and the floor base material.

[0006] The modified silicone adhesive used in the present invention is obtained by adding various additives to a modified silicone polymer and curing the polymer. The modified silicone polymer,
The main chain is a polyoxyalkylene having a crosslinkable hydrolyzable silyl group at a terminal.

[0007] The modified silicone polymer is, for example,
It can be obtained by reacting a polyoxyalkylene having an allyl group at the terminal with a silicon hydride compound represented by the formula (1) in the presence of a Group VIII transition metal.

[0008]

Embedded image

In the formula, R represents a group comprising a monovalent hydrocarbon group and a halogenated monovalent hydrocarbon group;
Represents 0, 1 or 2, and X represents an atom or a group selected from a halogen atom, an alkoxy group, an acyloxy group and a ketoxmate group.

The polyoxyalkylene which is the main chain of the modified silicone polymer includes, for example, polyoxyethylene, polyoxypropylene, polyoxybutylene and the like. Among these, those whose main chain is polyoxypropylene are commercially available. The crosslinkable hydrolyzable silyl group is preferably, for example, a methoxysilyl group.

The number average molecular weight of the modified silicone polymer is preferably from 4,000 to 30,000, more preferably from 10,000 to 30,000, for ease of handling. The molecular weight distribution (weight average molecular weight / number average molecular weight) is preferably 1.6 or less.

Commercially available modified silicone polymers include, for example, “MS Polymer S-
203 "," MS Polymer S-303 "," MS Polymer S-903 "," Cyril SAT-200 "," Cyril MA-430 "," Cyril MA-447 ";" EXESTER ESS-2410 "manufactured by Asahi Glass Co., Ltd. , “Exeter ESS-2420”, “Exeter ESS-36”
20 "and" Exester ESS-3430 ". The modified silicone polymer may be used alone or in combination of two or more.

The modified silicone adhesive can be obtained by adding the following additives to the modified silicone polymer. As the additive, a compound having an amino group and an alkoxysilyl group in one molecule, a silanol condensation catalyst, a dehydrating agent, a filler, a plasticizer, an anti-sagging agent and the like are used as necessary.

The compound having an amino group and an alkoxysilyl group in one molecule is added as an adhesion-imparting agent. Examples of the compound include 3-aminopropyltrimethoxysilane, 3-aminopropylmethyldimethoxysilane, and 3-aminopropylmethyldimethoxysilane. -Aminopropyltriethoxysilane, 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 ' -Screw-
[3- (methyldimethoxysilyl) propyl] ethylenediamine, N, N'-bis- [3- (trimethoxysilyl) propyl] hexamethylenediamine, N, N'-bis- [3- (triethoxysilyl) propyl] Hexamethylenediamine, N, N′-bis- [3- (methyldimethoxysilyl) propyl] hexamethylenediamine,
N, N-bis- [3- (trimethoxysilyl) propyl] ethylenediamine, N, N-bis- [3- (methyldimethoxysilyl) propyl] ethylenediamine,
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, which may be used alone or in combination of two or more.

Examples of the silanol condensation catalyst include dibutyltin dilaurate, dibutyltin oxide,
Dibutyltin diacetate, dibutyltin phthalate, bis (dibutyltin laurate) oxide, 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 or basic catalysts. And these may be used alone or in combination of two or more.

Examples of the dehydrating agent include silane compounds such as vinyltrimethoxysilane, dimethyldimethoxysilane, methyltrimethoxysilane, tetramethoxysilane, tetraethoxysilane, methyltriethoxysilane, phenyltrimethoxysilane and diphenyldimethoxysilane. Hydrolysable ester compounds such as methyl orthoformate, methyl orthoacetate and ethyl orthoacetate; these may be used alone or in combination of two or more.

The above-mentioned filler is used for the purpose of reinforcing an elastic layer containing a silicone resin. Examples thereof include calcium carbonate, magnesium carbonate, calcium oxide, hydrous silicic acid, silicic anhydride, and calcium silicate. , Fine powder silica, titanium dioxide, clay, talc, carbon black, glass balloon, and the like. These may be used alone or in combination of two or more.

Examples of the plasticizer include phosphoric esters such as tributyl phosphate and tricresyl phosphate; phthalic esters such as dioctyl phthalate; monobasic esters of fatty acids such as glycerin monooleate; dibutyl adipate; Fatty acid dibasic acid esters such as dioctyl adipate; and polypropylene glycols. 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.

If necessary, an antioxidant, an antioxidant, an ultraviolet absorber, a pigment, a solvent, a fragrance, etc. may be added to the modified silicone polymer.

The modified silicone-based adhesive is, for example, based on 100 parts by weight of the modified silicone polymer.
0.2 to 20 parts by weight of a compound having an amino group and an alkoxysilyl group in one molecule, and a silanol condensation catalyst of 0.1 to 20 parts by weight
What consists of a composition containing 10 weight part and 10-200 weight part of calcium carbonate is preferable.

The modified silicone-based adhesive is, for example,
A modified silicone polymer, a compound having an amino group and an alkoxysilyl group in a molecule, a silanol condensation catalyst,
It is obtained by kneading a filler or the like with a roll, a planetary mixer or the like.

The above modified silicone-based adhesive is JIS
In a tensile test measured according to K6301, it is preferable that the strength at break is 15 kg / cm ² or more, the elongation at break is 100% or more, and the permanent elongation is 50% or less.

If the strength at break is less than 15 kg / cm ² , sufficient adhesive strength cannot be obtained. If the elongation at break is less than 100%, the floor material cannot sufficiently follow the deformation such as warpage or shrinkage, and the bias of the stress of the floor material may cause noise. On the other hand, when the permanent elongation exceeds 50%, the deterrent force at the time of floor material deformation is insufficient, and the deformation becomes large, so that noise is easily generated.

The modified silicone adhesive has a viscosity measured by a Brookfield viscometer of 1,000 to 1,000,000 mPa · s (23 ° C.) at 10 rotations, and (viscosity at one rotation / 10 rotations at 10 rotations). Is preferably 3 or more.

The viscosity at the time of 10 rotations is 1000 mPa
If it is less than s, the amount of application will be large at the time of construction on a surface with unevenness, and if it exceeds 1 million mPa · s, there will be a problem in workability. Further, the ratio of (viscosity at one rotation / viscosity at ten rotations) represents thixotropic property. If this ratio is less than 3, a sufficient bonding area cannot be secured when constructing an uneven surface. Sometimes.

In the floor structure of the present invention, as shown in FIG. 1, a sound insulation sheet 3 is sandwiched between a floor material 1 and a floor base material 2, and the floor material 1 and the sheet 3 having a sound insulation property are interposed. An elastic layer 4 made of the above-mentioned modified silicone-based adhesive is laminated between the sheet 3 having a sound insulating property and the floor base material 2. The elastic layer 4 does not necessarily need to be laminated on both, and may be laminated on either one.

As a method of manufacturing the floor structure, for example, an uncured modified silicone adhesive for forming the elastic layer 4 on the floor base material 2 has a thickness of 0.1 to 1 after curing.
After uniformly coating so as to have a thickness of about 0 mm, a sheet 3 having a sound insulating property is pressure-bonded thereon, and an uncured modified silicone-based adhesive is further cured thereon to a thickness of 0.1 to 0.1 mm.
There is a method in which a coating is uniformly applied to a thickness of about 10 mm, and then a floor material is pressed thereon.

Examples of the floor material include wood flooring, tiles, vinyl chloride sheets, and stone materials. Examples of the floor base material include plywood, tree joists, gypsum board, slate board, concrete and the like.

As the above-mentioned sound insulating sheet, a sheet having a high specific gravity is used, and examples thereof include a vinyl chloride sheet filled with a high specific gravity inorganic material, an air-crushed slag-asphalt-based vibration damping sheet, and a metal chip-glass cloth laminated sound insulating sheet. Can be Commercially available vinyl chloride sheets filled with a high specific gravity inorganic material include, for example, "Cactus Silent" manufactured by Nippon Mining Co., Ltd., "Three Shadan" manufactured by Sanyo Kogyo Co., Ltd., and "Vibless Sheet" manufactured by Sekisui Chemical Co., Ltd.

(Function) The floor structure of the present invention comprises a modified silicone adhesive between a floor material and a floor base material.
An elastic layer having an elongation at break of 50% or more in a tensile test according to SK 6301 and a permanent elongation of 10% or less in a permanent elongation test according to JIS K 6301 is laminated. Absorbs the stress when the floor structure is deformed, so that noise due to creaking does not occur. Further, since the sound insulation sheet is sandwiched, the generation of noise can be further prevented.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention and comparative examples will be described.

Preparation of Modified Silicone Adhesive Modified silicone polymer ("Silyl SA" manufactured by Kanegafuchi Chemical Co., Ltd.)
T-400 ", 100 parts by weight of number average molecular weight 20,000), 150 parts by weight of colloidal calcium carbonate (filler," CCR "manufactured by Shiraishi Industry Co., Ltd.), vinyltrimethoxysilane (dehydrating agent," Sila Ace S210 "manufactured by Chisso Corporation) ) 4 parts by weight, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane as catalyst (“KB
M-6 ") After mixing a reaction product of 3 parts by weight with 1 part by weight of 3-glycoxypropyltrimethoxysilane and 1 part by weight of dibutyltin dilaurate, the mixture was vacuum kneaded with a planetary mixer for 60 minutes, and then modified silicone was obtained. A system adhesive was obtained.

The properties of the cured product (physical properties of the elastic layer) of the modified silicone adhesive and the vinyl acetate solvent-based adhesive (“Sekisui Bond for wooden bricks” manufactured by Sekisui Chemical Co., Ltd.) were measured by the following test methods. The results are shown in Table 1. Strength and elongation at break Tensile test (thickness 2 mm) in accordance with JIS K6301
No. 3 dumbbell, curing condition: normal temperature for 2 weeks), and the strength and elongation at break were measured. Permanent elongation In a permanent elongation test based on JIS K6301, permanent elongation was measured. Viscosity 10 at 23 ° C. by BS viscometer (rotor No. 7)
The viscosity during rotation was measured. From the value measured with a thixotropic BS viscometer, (viscosity at one rotation / 10
(Viscosity during rotation) was calculated.

[0035]

[Table 1]

(Example 1) A sheet having a sound insulation property ("Sekisui Chemical Co., Ltd. Bibless Sheet") is provided between a wooden flooring material (thickness 6 mm) as a floor material and a softwood plywood (thickness 15 mm) as a floor base material. The thickness after curing the modified silicone-based adhesive is 0 between the floor covering material and the sheet having sound insulation, and between the sheet having sound insulation and the floor material. The laminate was laminated to a thickness of 0.5 mm and cured at room temperature for 2 weeks to produce a floor structure.

(Comparative Example 1) A vinyl acetate solvent type adhesive ("Sekisui Bond" for wood bricks) manufactured by Sekisui Chemical Co., Ltd. was used as an adhesive, and no sound insulating sheet was used at all. A floor structure was produced in the same manner as in Example 1.

Comparative Example 2 A floor structure was produced in the same manner as in Example 1 except that a vinyl acetate solvent-type adhesive ("Sekisui Bond for wood bricks" manufactured by Sekisui Chemical Co., Ltd.) was used as the adhesive. .

Regarding the floor structures of the above Examples and Comparative Examples, a steel-frame unit type prefabricated house manufactured by Sekisui Chemical Co., Ltd.
It was constructed on the floor of the floor, and the lightweight floor impact sound level was measured according to JIS A1418. The measurement results are shown in FIG.

[0040]

The structure of the floor structure of the present invention is as described above, and the elastic layer having a specific elongation at the time of cutting and a permanent elongation made of a modified silicone adhesive is laminated. Noise generated when walking on the floor can be prevented. Further, since the sound insulating sheet is used, noise generated when walking on the floor or the like can be further prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a floor structure of the present invention.

FIG. 2 is a curve showing measurement results of a lightweight floor impact sound level.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor material 2 Floor base material 3 Sound insulation sheet 4 Elastic layer 10 Floor structure

Claims (3)

[Claims] 1. A floor structure comprising a floor material and a floor base material on two or more floors, a sound-insulating sheet is sandwiched between the floor material and the floor base material, and the sound insulation is reduced. A floor structure, wherein an elastic layer made of a modified silicone-based adhesive is laminated between the sheet and the floor material and / or the floor base material. 2. The modified silicone adhesive according to JIS
In a tensile test measured according to K 6301,
The floor structure according to claim 1, wherein the strength at break is 15 kg / cm ² or more, the elongation at break is 100% or more, and the permanent elongation is 50% or less. 3. The modified silicone adhesive has a viscosity measured by a Brookfield viscometer of 10 to 1,000,000 mPa · s at 10 rotations, and (viscosity at one rotation / 10 viscosity at 10 rotations). 3. The floor structure according to claim 1, wherein the ratio is 3 or more. 4.