JP2000265646A - Floor structure - Google Patents

Abstract

(57) [Summary] [Problem] By bonding using a modified silicone adhesive containing a specific amount of a specific filler, floor noise due to shrinkage of floor material or human walking. An object of the present invention is to provide a floor structure in which almost no occurrence occurs. SOLUTION: The floor material comprises a floor material and a floor heating unit adhered by a modified silicone adhesive, wherein the modified silicone adhesive has a needle-like crystallinity with respect to 100 parts by weight of the modified silicone polymer. A floor structure comprising a modified silicone adhesive containing 50 parts by weight or less of a filler (whisker).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a floor structure.

[0002]

2. Description of the Related Art Conventionally, epoxy resin adhesives, vinyl acetate resin adhesives, and the like, which are mainly advantageous in terms of cost, have been widely used for laminating floor materials in floor structures. However, the epoxy resin-based adhesive and the vinyl acetate resin-based adhesive have a problem that the resulting floor structure has a loud floor noise since the cured or dried film is hard. The floor noise referred to here means an undesired sound generated from a floor component when a person steps on the floor by walking or the like.

In order to cope with the above-mentioned problems, recently, a modified silicone-based adhesive having good workability and a cured film having high elasticity has been used. However, when using a modified silicone-based adhesive, for example, bonding floor materials for floor heating, etc.,
Another problem occurs in that the floor material and the like shrink to form gaps.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a floor material by bonding with a modified silicone adhesive containing a specific amount of a specific filler. An object of the present invention is to provide a floor structure that hardly generates floor noises caused by eye gaps due to contraction of the floor or human walking.

[0005]

A floor structure according to the first aspect of the present invention (hereinafter referred to as "the present invention") is formed by bonding a floor material and a floor heating unit with a modified silicone adhesive. A floor structure, wherein the modified silicone-based adhesive is based on 100 parts by weight of the modified silicone polymer.
It is a modified silicone-based adhesive containing 50 parts by weight or less of needle-like crystalline filler (whisker).

The modified silicone adhesive used in the present invention comprises a modified silicone polymer as a main component and a needle-like crystalline filler (whisker) as a filler as an essential component, to which a curing catalyst and various other additives are added. An adhesive obtained by adding and kneading one or more of these agents.

The modified silicone polymer used as a main component is not particularly limited. For example, the modified silicone polymer has a main chain of polyoxyalkylene and contains at least one crosslinkable hydrolyzable silyl group at a molecular terminal. The polymer is preferably used.

The above modified silicone polymers may be used alone or in combination of two or more.

The polyoxyalkylene constituting the main chain of the modified silicone polymer is not particularly restricted but includes, for example, polyoxyethylene, polyoxypropylene, polyoxybutylene and the like, which are preferably used. However, among them, polyoxypropylene is more preferably used.

The above polyoxyalkylenes may be used alone or in combination of two or more.

The crosslinkable hydrolyzable silyl group contained in at least one molecular terminal of the modified silicone polymer is not particularly limited, but may be, for example, a methoxysilyl group or an ethoxysilyl group. Alkoxysilyl groups are mentioned, and these are preferably used because they do not generate harmful by-products during the curing reaction.

The above hydrolyzable silyl groups may be used alone or in combination of two or more.

The modified silicone polymer is not particularly limited, but has a number average molecular weight of 4000 to 30.
000 is preferred.

If the number average molecular weight of the modified silicone polymer is less than 4,000, the cured product of the modified silicone adhesive obtained may have insufficient elongation, and conversely, the number average molecular weight of the modified silicone polymer may be 30,000. If it exceeds 3, the viscosity of the modified silicone polymer becomes too high, and the handling workability in the compounding step, the kneading step and the like may deteriorate.

Among the modified silicone polymers having the above number average molecular weight, those having a number average molecular weight of 10,000 to 30 are preferred.
The modified silicone polymer having a molecular weight distribution (weight average molecular weight / number average molecular weight) of 1.6 or less has good handling workability in a compounding step, a kneading step, and the like, and is obtained. Since the extensibility of the cured product of the silicone adhesive is also excellent, it is more preferably used.

Specific examples of the modified silicone polymer are not particularly limited. For example, trade names “MS Polymer S-203” and “MS Polymer S-30”
"MS Polymer" series such as "MS 3" and "MS Polymer S-903" (all manufactured by Kaneka Corporation); trade names "Cyril SAT-200", "Cyril SAT-35"
0 "," Cyril SAT-400 "," Cyril MA-
"Syril" such as "430" and "Cyril MA-447"
Series (above, manufactured by Kanegabuchi Chemical Industry Co., Ltd.); commercially available products such as "Exester" series (hereinafter, manufactured by Asahi Glass Co., Ltd.) such as trade name "Exester ESS-2420", and the like, are preferably used.

The modified silicone polymer may be used alone or in combination of two or more.

The modified silicone adhesive used in the present invention is the modified silicone polymer 10 as a main component.
It is necessary that 50 parts by weight or less of a needle-like crystalline filler (whisker) is contained as a filler with respect to 0 parts by weight.

The needle-like crystalline filler (whisker) is not particularly limited, and examples thereof include potassium metal titanate whisker, basic magnesium sulfate whisker, aluminum borate whisker, calcium carbonate whisker, and the like. It is preferably used.

Needle-like crystalline filler (whisker)
May be used alone or in combination of two or more.

If the content of the acicular crystalline filler (whisker) exceeds 50 parts by weight based on 100 parts by weight of the modified silicone polymer, the surface hardness of the cured product of the modified silicone-based adhesive obtained becomes too high, and A floor noise is generated in the component.

In the modified silicone adhesive used in the present invention, in addition to the above-mentioned modified silicone polymer and the acicular crystalline filler (whisker), which are essential components, the modified silicone polymer is cured to promote a moisture curing reaction. Preferably, a catalyst has been added.

As the above-mentioned curing catalyst, a silanol condensation catalyst which has been generally used as a curing catalyst for a modified silicone polymer and the like can be mentioned, and it is preferably used.

The above curing catalyst may be used alone or in combination of two or more.

The silanol condensation catalyst is not particularly restricted but includes, for example, dibutyltin dilaurate, bis (dibutyltin lauric acid) oxide, dibutyltin oxide, dibutyltin diacetate, dibutyltin phthalate, dibutyltin bisphthalate. Tin compounds such as acetate, dibutyltin (monoester malate), tin octylate, dibutyltin octoate, dioctyltin oxide; titanate compounds such as tetra-n-butoxytitanate and tetraisopropoxytitanate; dibutylamine-n- Amine compounds such as ethylhexoate; and other acidic catalysts and basic catalysts, etc., are preferably used.

The above silanol condensation catalyst may be used alone or in combination of two or more.

The amount of the curing catalyst to be added to the modified silicone polymer is not particularly limited, but the curing catalyst is added in an amount of 0.1 part by weight to 100 parts by weight of the modified silicone polymer.
It is preferably from 1 to 5 parts by weight, more preferably from 0.5 to 3 parts by weight.

If the amount of the curing catalyst added is less than 0.1 part by weight per 100 parts by weight of the modified silicone polymer, a sufficient curing acceleration effect may not be obtained. If the amount exceeds 5 parts by weight, the physical properties of the cured product may be reduced even though the curing acceleration effect is no longer improved.

The modified silicone-based adhesive used in the present invention may optionally contain a curing co-catalyst in order to further improve the curability of the modified silicone polymer as long as the achievement of the object of the present invention is not hindered. It may be.

The curing co-catalyst is not particularly restricted but includes, for example, silane compounds such as amino-substituted alkoxysilanes such as ketoxime silane, alkoxysilane, aminoxysilane and amidosilane, and laurylamine and the like. Examples thereof include amine compounds and derivatives thereof, and are preferably used.

The curing co-catalysts may be used alone or in combination of two or more.

Further, the modified silicone adhesive used in the present invention includes an antioxidant for preventing thermal deterioration and a bonding agent for improving adhesiveness, if necessary, within a range not hindering the achievement of the object of the present invention. An adhesiveness-imparting agent, an epoxy resin for improving durable adhesiveness, a dehydrating agent for removing moisture, a filler other than the acicular crystalline filler (whisker) for reinforcement, and a filler for improving extensibility. One or two of various additives such as a plasticizer (softening agent), an anti-sagging agent, a stabilizer, an ultraviolet absorber, a flame retardant, a colorant, a fragrance, and an organic solvent.
More than one species may be contained.

The antioxidant is not particularly limited, and examples thereof include a hindered phenol antioxidant, a hindered amine antioxidant, a benzotriazole antioxidant, and the like. 2
More than one species is preferably used.

The amount of the antioxidant to be added is not particularly limited, but the modified silicone polymer 100
The amount of the antioxidant is preferably 0.5 to 10 parts by weight based on part by weight. If the amount of the antioxidant is less than 0.5 part by weight per 100 parts by weight of the modified silicone polymer, a sufficient effect of preventing heat deterioration may not be obtained. Even if the addition amount exceeds 10 parts by weight, the effect of preventing thermal deterioration is no longer improved.

The adhesiveness-imparting agent is not particularly restricted but includes, for example, a compound having an amino group and an alkoxysilyl group in one molecule and a compound having an amino group and an alkoxysilyl group in one molecule. Examples thereof include a reaction product with a silane compound having an epoxy group, and one or more of these are suitably used.

Specific examples of the compound having an amino group and an alkoxysilyl group in one molecule are not particularly restricted but include, for example, 3-aminopropyltrimethoxysilane, 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] amine, N, N'-bis- [3- (triethoxysilyl) propyl] amine, N, N'-bis- [3- (methyl Dimethoxysilyl) propyl] amine, and one or more of these are suitably used.

Specific examples of a reaction product of a compound having an amino group and an alkoxysilyl group in one molecule and a silane compound having an epoxy group are not particularly limited. For example, N- ( 2-aminoethyl) -3
Reaction products of -aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane and the like with 3-glycidoxypropyltrimethoxysilane and the like. 2
More than one species is preferably used.

The dehydrating agent is not particularly restricted but includes, for example, vinyltrimethoxysilane, dimethyldimethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, tetramethoxysilane, tetraethoxysilane, Silane compounds such as phenyltrimethylsilane and diphenyldimethoxysilane; and hydrolyzable ester compounds such as methyl orthoformate, ethyl orthoformate, methyl orthoacetate and ethyl orthoacetate. One or more of these are preferably used. Among them, vinyltrimethoxysilane, tetraethoxysilane and the like are more preferably used.

The filler other than the acicular crystalline filler (whisker) is not particularly limited.
For example, calcium carbonate, magnesium carbonate, calcium oxide, hydrous silicic acid, anhydrous silicic acid, calcium silicate, fine powdered silica, titanium dioxide, clay, talc, carbon black, glass balloon, mica, etc., and one or two of these are mentioned. The above is preferably used, and calcium carbonate is more preferably used.

The plasticizer (softening agent) is not particularly restricted but includes, for example, phosphates such as tributyl phosphate and tricresyl phosphate; phthalates such as dibutyl phthalate, dioctyl phthalate and 2-ethylhexyl phthalate. Acid esters; fatty acid monobasic acid esters such as glycerin monooleate; fatty acid dibasic acid esters such as dibutyl adipate and dioctyl adipate; glycols such as polypropylene glycol; Two or more are suitably used.

The colorant is not particularly limited, but includes, for example, carbon black, titanium oxide, and red iron oxide. One or more of these are preferably used.

The method for producing the modified silicone adhesive used in the present invention is not particularly limited, and the prescribed amounts of the modified silicone polymer and the acicular crystalline filler (whisker), which are essential components, the prescribed amount of the curing catalyst, After weighing one or more predetermined amounts of one or more of the above-mentioned curing co-catalysts and various additives added as necessary, pre-mixing the mixture with a mixer such as a mixer or a kneader, and then dehydrating at room temperature under reduced pressure. Alternatively, a desired denatured silicone adhesive can be obtained by performing dehydration by heating and then kneading the mixture uniformly using, for example, the above-mentioned mixer or three rolls.

The modified silicone-based adhesive used in the present invention may be designed as a one-component adhesive or a two-component mixed adhesive, but is simple in construction and excellent in workability. It is preferably a one-component adhesive.

The physical properties of the cured product of the modified silicone adhesive used in the present invention are not particularly limited.
For example, based on JIS K-6251 "Tensile test method for vulcanized rubber", a 30% modulus measured on a dumbbell-shaped No. 3 test piece is preferably 10 kg / cm ² or more. Type A according to K-6253 "Testing method for hardness of vulcanized rubber and thermoplastic rubber"
The surface hardness measured by a durometer is preferably 80 or less.

The above 30% modulus is 10 kg / cm ²
When the surface hardness is less than 80, shrinkage of a floor material or the like due to internal stress at the time of curing cannot be suppressed, and a gap may be easily generated. When a person later steps on the floor component by walking or the like, the impact cannot be absorbed, and an undesired floor noise may easily occur.

The floor structure according to the present invention is obtained by bonding a floor material and a floor heating unit using the above-mentioned modified silicone adhesive. The construction method (adhesion method) of this floor component is not special, and for example, a denatured silicone adhesive may be applied on a floor heating unit, and a floor material may be laminated thereon and bonded by pressing and bonding. .

The modified silicone-based adhesive is usually filled in a cartridge container provided with a nozzle, and when used, a method of applying pressure while applying pressure to the cartridge container and extruding it from the tip of the nozzle is generally employed. .

The nozzle mounted on the cartridge container is usually provided with one discharge port, so that one bead can be applied by one application.
Further, by using a nozzle provided with a plurality of discharge ports, it is possible to apply a plurality of beads in a single application.

The floor material used for the floor structure according to the present invention is not particularly limited, and may be a so-called ordinary floor material itself, or the floor finish material and the floor base material may be the modified silicone-based material. It may be bonded by an adhesive, and the bonding method may be applied at the time of bonding. Further, the application of the modified silicone-based adhesive may be simultaneously performed on the floor base material and the tongue.

Examples of the floor finishing material include, but are not particularly limited to, wood flooring such as plywood, MDF (medium density fiberboard), tile, vinyl chloride resin sheet, and stone material. Used.

The floor base material is not particularly limited, and examples thereof include plywood, tree roots, gypsum board, slate board, concrete and the like, and are preferably used.

The floor heating unit used in the floor structure according to the present invention is not particularly limited. For example, even if the floor heating unit is sandwiched between a floor finishing material and a floor base material. Good, for example, a floor heating unit in which a heating element such as a hot water pipe is panelized with a softwood plywood, a Lauan plywood, or the like may be used as it is as a floor base material, or a floor heating unit may be provided on a lower surface of the floor base material. Units may be stacked.

[0053]

In the floor structure according to the present invention, the floor material and the floor heating unit are bonded by a modified silicone-based adhesive containing a specific amount of needle-like crystalline filler (whisker) as a filler. There is almost no floor squealing sound due to eye gaps due to shrinkage of the material or walking of a person.

[0054]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. In the examples, “parts” means “parts by weight”.

(Example 1)

(1) Production of Modified Silicone Adhesive As a modified silicone polymer, a product name "Syril SAT"
-400 "(manufactured by Kanegafuchi Chemical Co., Ltd.), 100 parts of dibutyltin dilaurate as a curing catalyst, 4 parts of vinyltrimethoxysilane as a dehydrating agent, and N- (2
-Aminoethyl) -3-aminopropyltrimethoxysilane, 2 parts, pentaerythrityl-tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate] as an antioxidant, 1 part, plasticizer Dioctyl phthalate as filler, colloidal calcium carbonate (trade name “CCR”, manufactured by Shiraishi Industry Co., Ltd.) 150 as filler
Parts and 20 parts of potassium metal titanate whisker as a needle-like crystalline filler (whisker) are blended and kneaded in a vacuum atmosphere for about 60 minutes using a planetary mixer to obtain a one-pack modified silicone adhesive. Obtained.

(2) Evaluation The properties (viscosity, thixotropy, 30% modulus, surface hardness, porosity, floor noise) of the modified silicone adhesive obtained above were evaluated by the following methods. The results were as shown in Table 1.

Viscosity: Using a Brookfield-type rotational viscometer, rotor No. 6. The viscosity (cps) at 23 ° C. was measured under the condition of a rotation speed of 10 rpm.

Thixotropy: Using a Brookfield-type rotational viscometer, rotor no. 6, rotation speed 1r
The viscosities at 23 ° C. were measured under the conditions of rpm and 10 rpm, and the viscosity ratio (1 rpm viscosity / 10 rpm)
m viscosity) was determined to be thixotropic.

30% modulus: JIS K-625
According to No. 1, a cured product of the modified silicone adhesive was punched into a dumbbell-shaped No. 3 test piece, and a 30% modulus (kg / cm ² ) was measured.

Surface hardness: The surface hardness of the cured product of the modified silicone adhesive was measured with a type A durometer according to JIS K-6253.

[0062] Porosity: A denatured silicone adhesive was applied in the width direction of softwood plywood (300 mm x 1800 mm x 20 mm thick) dried at 80 ° C for 1 week at intervals of 300 mm for 6 m.
After applying 6 pieces in a bead shape of m width, 2 pieces are put on softwood plywood.
Pieces of floor material (300mm × 900mm × 12mm thickness)
Were horizontally arranged and laminated, and four corner ends were fixed with nails to obtain a floor structure. 20% -65% of this floor structure
After curing for 2 weeks in an atmosphere of RH and then heating and drying at 80 ° C. for 1 week, the gap width (mm) generated between the two floor members was measured.

Floor noise: Softwood plywood (300 mm ×
The modified silicone-based adhesive is applied in the short direction (450 mm × 20 mm thick) at intervals of 300 mm (center line distribution) at 6 mm.
After applying two beads in a width bead shape, a floor material (300 mm × 450 mm × 12 mm thickness) is horizontally laminated on a softwood plywood, and once pressure is applied to spread the denatured silicone adhesive, and then the floor material is spread. A 10 kg weight was placed on the center of the and pressed down to obtain a floor structure. This floor structure is
After curing for 2 weeks in an atmosphere of 65% RH, both ends of the softwood plywood in the short direction are supported by a support, and a bending stress of 3 mm displacement is applied to the center of the floor material at a speed of 500 mm / min. The presence or absence of floor noise due to peeling or cracking was measured.

(Comparative Example 1) In the production of the modified silicone adhesive, the modified silicone polymer was replaced with a product name “MS” instead of 100 parts of “SILYL SAT-400”.
Using 100 parts of Polymer S-203 (manufactured by Kanegafuchi Chemical Industry Co., Ltd.), the amount of dioctyl phthalate (plasticizer) was adjusted to 40.
Example 1, except that the blending amount of colloidal calcium carbonate “CCR” (filler) was 200 parts and no potassium whisker was used as a needle-like crystalline filler (whisker). In the same manner as in the above, a one-pack type modified silicone adhesive was obtained.

Comparative Example 2 In the production of a modified silicone adhesive, the amount of dioctyl phthalate (plasticizer) was 10 parts, and 150 parts of colloidal calcium carbonate “CCR” and 150 parts of ordinary Portland cement 40 were used as fillers.
Part, and needle-like crystalline filler (whisker)
A one-pack modified silicone adhesive was obtained in the same manner as in Example 1 except that no potassium metal titanate whisker was added.

In the case of Example 1, the performance (viscosity, thixotropy, 30% modulus, surface hardness, porosity, floor noise) of the two types of modified silicone adhesives obtained in Comparative Examples 1 and 2 was measured. The evaluation was performed in the same manner as described above. The results were as shown in Table 1.

[0067]

[Table 1]

As is evident from Table 1, the floor structure of Example 1 according to the present invention hardly produced any gaps due to shrinkage of the floor material, and generated no floor noise.

On the other hand, a needle-like crystalline filler (with
Car), and conforms to JISK-6251
30% modulus of cured product measured at 10 kg / c
m ^TwoAdhesion using modified silicone adhesive
The floor structure of Comparative Example 1 did not generate floor noise.
However, the occurrence of gaps due to shrinkage of the floor material was large.

. Needle-like crystalline filler (whisker)
And the surface hardness of the cured product measured with a type A durometer according to JIS K-6253 is 8
In the floor structure of Comparative Example 2 bonded using the modified silicone-based adhesive which exceeded 0, although almost no gap was generated due to shrinkage of the floor material, generation of floor noise was observed.

[0071]

As described above, the floor structure according to the present invention hardly generates any floor noise due to shrinkage of the flooring material or walking of a person or the like. It is suitably used as a body.

Claims (1)

[Claims] 1. A floor structure comprising a floor material and a floor heating unit adhered by a modified silicone adhesive, wherein the modified silicone adhesive is used as a needle-like crystal with respect to 100 parts by weight of the modified silicone polymer. A floor structure comprising a modified silicone adhesive containing 50 parts by weight or less of a conductive filler (whisker).