Butyl rubber pressure-sensitive adhesive composition, pressure-sensitive adhesive tape, waterproof sheet for roofing, pressure-sensitive adhesive composition for fixing toilet bowls, and joint body

Abstract

To provide a butyl-based rubber adhesive composition with excellent adhesion, tackiness, and holding power (shear force).SOLUTION: The present invention provides a butyl-based rubber adhesive composition, containing 100 pts.mass of a butyl-based rubber, 150-700 pts.mass of an inorganic compound, 20-300 pts.mass of a softener, and 5-70 pts.mass of a fibrous organic compound.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a butyl-based rubber pressure-sensitive adhesive composition. More specifically, it relates to a butyl-based rubber pressure-sensitive adhesive composition used for joining roof tiles and waterproof sheets, a toilet fixing pressure-sensitive adhesive composition used for fixing a toilet to a floor, etc. The present invention also relates to an adhesive tape using the butyl-based rubber pressure-sensitive adhesive composition, a roof waterproof sheet using the butyl rubber pressure-sensitive adhesive composition, an assembly formed by joining a roof tile and a waterproof sheet with the butyl rubber pressure-sensitive adhesive composition, and an assembly formed by joining a toilet to a floor. [Background technology]

[0002] Generally, on the roofs of buildings such as houses, a waterproof sheet made of synthetic rubber or the like is laid between the roofing substrate and the roofing tiles to prevent the infiltration of rainwater, etc. This waterproof sheet and the roofing tiles are joined by mechanical fastening methods such as nails, bolts, and rivets, joining methods using solvent-based adhesives, or joining methods using acrylic rubber or butyl rubber adhesive tape.

[0003] Among these, a joining method using rubber-based adhesive tape is widely used from the viewpoints of water resistance, workability, etc. Patent Document 1 proposes a method of joining roof tiles and waterproof sheets using butyl rubber-based adhesive tape. However, when the entire roof is exposed to high temperatures due to strong sunlight in summer, etc., there is a problem in that creep deformation occurs due to a decrease in the shear strength of the adhesive.

[0004] In order to improve the shear strength of the adhesive, a method of impregnating a nonwoven fabric with the adhesive (Patent Documents 2 and 3) and a method of dispersing fibers in the adhesive have been proposed (Patent Document 4). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2004-300674 [Patent Document 2] Patent Publication No. 10-245534 [Patent Document 3] Patent Publication No. 2005-062341 [Patent Document 4] Patent Publication No. 08-325532 Summary of the Invention [Problem to be solved by the invention]

[0006] Generally, adhesive strength, tack, and holding power (shear strength) are called the three elements of adhesiveness, and among these, tack and holding power (shear strength) are trade-off elements. In the method of impregnating a nonwoven fabric with an adhesive, as in Patent Documents 2 and 3, the constraint of the nonwoven fabric suppresses the deformation of the adhesive, improving shear strength, but there is an issue of a decrease in instantaneous adhesion to the adherend, known as tack. Furthermore, the adhesive of Patent Document 4 has good tackiness because it is not constrained like a nonwoven fabric, but because it is made up of only butyl rubber and fibers, there is an issue with shear strength. As a result of the above, none of the methods achieved a balance between the three adhesive elements: adhesive strength, tack, and holding power (shear strength).

[0007] An object of the present invention is to provide a butyl rubber pressure-sensitive adhesive composition that has excellent adhesive strength, tack, and holding power (shear strength). The butyl rubber pressure-sensitive adhesive composition can be suitably used, for example, in applications such as waterproof sheets for roofs and for fastening toilet bowls to floors, which have previously been joined by mechanical fastening methods such as nails, bolts, and rivets. [Means for solving the problem]

[0008] The present inventors have conducted extensive research to solve the above problems, and as a result have found that the above problems can be solved by using a composition with a specific blend, which has led to the completion of the present invention.

[0009] That is, according to the present invention, the following inventions are provided. [1] A butyl-based rubber pressure-sensitive adhesive composition comprising 100 parts by mass of butyl-based rubber, 150 to 700 parts by mass of an inorganic compound, 20 to 300 parts by mass of a softener, and 5 to 70 parts by mass of a fibrous organic compound. [2] The butyl rubber pressure-sensitive adhesive composition according to [1], wherein the inorganic compound contains 30% by mass or more of a clay mineral. [3] The butyl rubber pressure-sensitive adhesive composition according to [1] or [2], wherein the average fiber length of the fibrous organic compound is 0.5 to 10 mm. [4] A pressure-sensitive adhesive tape comprising the butyl rubber pressure-sensitive adhesive composition according to any one of [1] to [3]. [5] A waterproof sheet for roofs, comprising a pressure-sensitive adhesive layer containing the butyl rubber pressure-sensitive adhesive composition according to any one of [1] to [3], and a waterproof sheet laminated on the pressure-sensitive adhesive layer. [6] A bonded structure comprising a roof tile and a waterproof sheet bonded together with the butyl rubber pressure-sensitive adhesive composition according to any one of [1] to [3]. [7] A pressure-sensitive adhesive composition for fixing a toilet, which is used for fixing a toilet to a floor, and comprises the butyl rubber pressure-sensitive adhesive composition according to any one of [1] to [3]. [8] A joint formed by joining a toilet bowl and a floor with the adhesive tape described in [4]. [9] A joined body formed by joining a toilet bowl and a floor with the pressure-sensitive adhesive composition for fixing a toilet bowl described in [7]. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are diagrams illustrating a method for evaluating creep resistance, in which Fig. 1A shows the state at the start of the test, and Fig. 1B is a diagram illustrating the amount of displacement after being left standing. DETAILED DESCRIPTION OF THE INVENTION

[0011] Preferred embodiments for carrying out the present invention will be described below. Note that the embodiment described below is an example of a typical embodiment of the present invention, and the scope of the present invention should not be construed as being narrow.

[0012] [Butyl rubber pressure-sensitive adhesive composition] The butyl-based rubber pressure-sensitive adhesive composition of the present invention contains a butyl-based rubber, an inorganic compound, a softener, and a fibrous organic compound. More specifically, the butyl-based rubber pressure-sensitive adhesive composition contains 100 parts by mass of the butyl-based rubber, 150 to 700 parts by mass of the inorganic compound, 20 to 300 parts by mass of the softener, and 5 to 70 parts by mass of the fibrous organic compound. Each component will be described below.

[0013] <Butyl rubber> The butyl-based rubber pressure-sensitive adhesive composition according to the present invention exhibits effects such as minimal change in adhesive strength over time and good water resistance due to the inclusion of a butyl-based rubber. In the present invention, butyl-based rubber refers to a rubber containing a butyl-based polymer containing monomer units derived from isobutylene. That is, the butyl-based rubber contains isobutylene monomer units. Furthermore, the butyl-based rubber according to one embodiment of the present invention may contain isobutylene monomer units and isoprene monomer units, i.e., a copolymer obtained by copolymerizing raw material monomers containing isobutylene and isoprene. The butyl-based rubber may be, for example, butyl rubber, partially crosslinked butyl rubber, recycled butyl rubber, polyisobutylene, chlorinated butyl rubber, or brominated butyl rubber, and the butyl-based rubber pressure-sensitive adhesive composition may contain one or more butyl-based rubbers selected from these. Furthermore, the butyl-based rubber pressure-sensitive adhesive composition according to the present invention exhibits good conformability to the adherend due to the inclusion of a butyl-based rubber, and is therefore suitable for use in joining adherends of different shapes, such as roof tiles and waterproof sheets, or flooring and toilets.

[0014] The butyl-based rubber pressure-sensitive adhesive composition according to the present invention may contain a rubber component other than butyl-based rubber. Examples of rubber components other than butyl-based rubber include liquid rubbers such as liquid polyisoprene, liquid polybutadiene, liquid polychloroprene, and liquid polybutene, natural rubber, isoprene rubber, butadiene rubber, 1,2-polybutadiene rubber, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, butyl rubber, chlorinated butyl rubber, chlorinated polyethylene rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber (EPDM), ethylene-vinyl acetate rubber, chloroprene rubber, chlorosulfonated polyethylene, acrylic rubber, epichlorohydrin rubber, silicone rubber, fluororubber, urethane rubber, and styrene-based thermoplastic elastomers. These rubber components other than butyl-based rubber may be used alone or in combination of two or more. The proportion of butyl-based rubber relative to the total rubber components is preferably 50% by mass or more, and more preferably 80% by mass or more. The proportion of the butyl rubber relative to the total rubber component is specifically, for example, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100% by mass, and may be within a range between any two of the numerical values exemplified here.

[0015] <Inorganic compounds> Examples of inorganic compounds include metal oxides such as alumina, aluminosilicate, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrites; hydrated inorganic substances such as aluminum hydroxide, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, and hydrotalcite; metal carbonates such as basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate, and barium carbonate; calcium salts such as calcium sulfate and calcium silicate; glass beads, silica-based balloons, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon balloons, charcoal powder, various metal powders, and potassium titanate. Examples of inorganic materials include magnesium sulfate, lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, zinc borate, various magnetic powders, fly ash, inorganic hollow fillers, pearlite, obsidian, perlite, rosin, diatomaceous earth, dewatered sludge, boron, sodium tetraborate hydrate (borax), inorganic phosphorus compounds, silica, glass fibers (E-glass fiber, C-glass fiber, S-glass fiber, D-glass fiber), rock wool, ceramic fibers (silica-alumina fiber, alumina fiber, silica fiber), zirconia fiber, carbon fiber, bulk alkaline earth silicate fiber, gypsum fiber, carbon fiber, metal fiber, slag fiber, basalt fiber, and other fibrous inorganic compounds, as well as clay mineral-based inorganic compounds containing clay minerals. These inorganic compounds may be used alone or in combination of two or more.

[0016] The clay mineral-based inorganic compound is at least one selected from natural or synthetic inorganic clay minerals. Examples of clay minerals include smectite clays such as bentonite, montmorillonite, and hectorite, fibrous clays such as sepiolite and palygorskite, sericite, illite, glauconite, chlorite, talc, zeolite, beidellite, nontronite, saponite, hectorite, sauconite, stevensite, cristopalite, smectite, kaolin, and clay (hydrated aluminum silicate). These clay minerals may be used alone or in combination.

[0017] The inorganic compound preferably contains 30% or more by mass of clay mineral. The ratio of clay mineral in the inorganic compound is, for example, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100% by mass, and may be within a range between any two of the values exemplified here.

[0018] The content of the inorganic compound is 150 to 700 parts by mass, preferably 230 to 595 parts by mass, and more preferably 300 to 470 parts by mass, per 100 parts by mass of butyl rubber. If it is less than 150 parts by mass, the rubber becomes too soft and creep resistance deteriorates. If it exceeds 700 parts by mass, the rubber becomes too hard and tack (stickiness) deteriorates. Specifically, the content of the inorganic compound is, for example, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, per 100 parts by mass of butyl rubber. , 430,440,450,460,470,480,490,500,510,520,530,540,550,560,570,580,590,600,610,620,630,640,650,660,670,680,690,700 parts by mass, and may be within a range between any two of the values exemplified herein.

[0019] <Softener> The type of softener is not particularly limited as long as it does not impair the object of the present invention, and one or more of any known softeners can be freely selected and used. Examples of softeners include paraffinic, naphthenic, and aromatic process oils, rapeseed oil, phthalates, adipates, alkylsulfonic acid esters, sebacic acid esters, process oils, and mineral oils. These softeners may be used alone or in combination of two or more.

[0020] The content of the softener is 20 to 300 parts by mass, preferably 50 to 170 parts by mass, and more preferably 80 to 145 parts by mass, per 100 parts by mass of the butyl-based rubber. If the content is less than 50 parts by mass, the rubber becomes too hard and tackiness (stickiness) deteriorates. If the content exceeds 300 parts by mass, the rubber becomes too soft and creep resistance deteriorates. Specific examples of the content of the softener are 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, and 300 parts by mass per 100 parts by mass of the butyl-based rubber, and may be within a range between any two of the values exemplified here.

[0021] <Fibrous organic compounds> The shape of the fibrous organic compound may be any as long as it is fibrous, and examples of the cross-sectional shape of the fiber include circular, elliptical, and polygonal. When the average fiber length of the fibrous organic compound is L and the average diameter is D, the L / D ratio of the fiber is, for example, more than 10, preferably 50 or more, and more preferably 100 or more. The upper limit is not particularly specified, but is, for example, 10,000. The average diameter of the fibrous organic compound is, for example, 1 to 100 μm, preferably 2 to 50 μm, and more preferably 5 to 20 μm. The average fiber length of the fibrous organic compound is, for example, 0.1 to 15 mm, and preferably 0.5 to 10 mm. The average fiber length of the fibrous organic compound is, for example, 0.1, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, or 15.0 mm, and may be within a range between any two of the values exemplified here.

[0022] Examples of fibrous organic compounds include meta-aramid fibers, para-aramid fibers, amide fibers, pulp fibers, cellulose fibers (pulp fibers), polyparaphenylene benzobisoxazole fibers, and polyarylate fibers. These fibrous organic compounds may be used alone or in combination of two or more. It is preferable that the fibrous organic compounds are contained in a dispersed state in the composition.

[0023] The average fiber length and average diameter of a fibrous organic compound are determined by measuring the lengths of a sufficiently large number of fibrous organic compounds, i.e., 20 or more, and averaging the measured lengths to obtain the average fiber length and average diameter.

[0024] The fiber length and diameter of the fibrous organic compound can be measured using, for example, a field emission scanning electron microscope (FE-SEM).

[0025] The content of the fibrous organic compound is 5 to 70 parts by mass, preferably 10 to 55 parts by mass, and more preferably 15 to 40 parts by mass, per 100 parts by mass of the butyl rubber. If it is less than 5 parts by mass, the rubber will be too soft and creep resistance will be poor. If it exceeds 70 parts by mass, adhesion will be poor. Specific examples of the content of the fibrous organic compound are 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, and 70 parts by mass per 100 parts by mass of the butyl rubber, and it may be within a range between any two of the values exemplified here.

[0026] The butyl rubber pressure-sensitive adhesive composition of the present invention may contain additives used in ordinary rubber compositions, such as a tackifier, a vulcanizing agent, an antioxidant, a vulcanization accelerator, a lubricant, etc. When a vulcanizing agent or a vulcanization accelerator is added, the total amount is preferably 0.05 parts by mass or less, or 0.01 parts by mass or less.

[0027] The butyl rubber pressure-sensitive adhesive composition can be obtained by kneading butyl rubber, an inorganic compound, a softener, a fibrous organic compound, and other necessary additives using a kneading device or the like (for example, a kneader mixer or the like).

[0028] [Adhesive tape] The butyl-based rubber pressure-sensitive adhesive composition according to the present invention can be suitably used for pressure-sensitive adhesive tapes for tiled roofs. For example, the components to be contained in the butyl-based rubber pressure-sensitive adhesive composition can be kneaded using a kneading device or the like, and the kneaded mixture can be formed into a tape-like pressure-sensitive adhesive tape for tiled roofs that is adhesive on both sides. In this case, the pressure-sensitive adhesive tape does not need to have a substrate.

[0029] The kneading device used when kneading the components is not particularly limited, and any known kneading device can be freely selected to perform the kneading. Examples of kneading devices include a Banbury mixer, a kneader mixer, and a two-roll mill. The method for forming the kneaded mixture into a tape is also not particularly limited, and any known forming method can be freely selected and used. Examples of such methods include molding methods such as roll molding and extrusion molding.

[0030] The pressure-sensitive adhesive tape obtained as described above has excellent adhesiveness and creep resistance because it uses the butyl rubber pressure-sensitive adhesive composition of the present invention, and as a result, the durability of an assembly in which a roof tile and a waterproof sheet are joined using this pressure-sensitive adhesive tape can also be improved.

[0031] [Roof waterproof sheet] The waterproof sheet for roofs according to the present invention comprises a pressure-sensitive adhesive layer and a waterproof sheet. Each of the components will be described below.

[0032] <Adhesive layer> The pressure-sensitive adhesive layer is made of the above-mentioned butyl rubber pressure-sensitive adhesive composition. Details of the butyl rubber pressure-sensitive adhesive composition will not be described here. The above-mentioned pressure-sensitive adhesive tape can also be used as this pressure-sensitive adhesive layer.

[0033] <Waterproof sheet> In the waterproof sheet for roofing according to the present invention, the waterproof sheet is laminated on a pressure-sensitive adhesive layer. The material used for the waterproof sheet is not particularly limited as long as it does not impair the object of the present invention, and one or more known materials can be freely selected and used. Examples of such materials include ethylene-propylene-diene rubber (EPDM) and polyvinyl chloride (PVC). Among these materials, EPDM is particularly preferred. This is because waterproof sheets using EPDM have good adhesion to butyl-based rubber pressure-sensitive adhesive compositions.

[0034] <Toilet> The above-mentioned butyl-based rubber pressure-sensitive adhesive composition can also be used, for example, to fasten a toilet bowl to a floor. According to one embodiment of the present invention, there is provided a joint formed by joining a toilet bowl to a floor with the above-mentioned butyl-based rubber pressure-sensitive adhesive composition (pressure-sensitive adhesive composition for fastening a toilet bowl) or an adhesive tape containing the butyl-based rubber pressure-sensitive adhesive composition. The joint forms part of a toilet, and a toilet can be provided that includes a joint formed by fastening (joining) the toilet bowl to the floor. The toilet bowl and floor may be joined solely with the above-mentioned butyl-based rubber pressure-sensitive adhesive composition, or may be joined in combination with a mechanical fastening method such as nails, bolts, or rivets. [Example]

[0035] The present invention will be described in more detail below with reference to examples. Note that the examples described below are representative examples of the present invention and should not be construed as narrowing the scope of the present invention.

[0036] In the examples, "parts" are based on mass. Details of the materials used in the examples are shown below. (1) Butyl rubber Butyl rubber (JSR Corporation's "Butyl 268") (2) Inorganic compounds Calcium carbonate: "TA044" manufactured by Chichibu Lime Industry Co., Ltd. Clay (containing aluminum silicate): "FA-80" manufactured by Gunma Feldspar Partnership (3) Softener Process oil: Idemitsu Kosan Co., Ltd. "AH-16" (4) Fibrous compounds <Fibrous organic compounds> Pulp fiber, average fiber length 1.2 mm: Oji Seitai Co., Ltd. "Neofiber NS-10" Aramid fiber, 0.25, 0.5, 3, 10, 12 mm: Twaron Short Cut Fiber manufactured by Teijin Limited <Fiber-like inorganic compounds> Glass fiber, average fiber length 3 mm: "ECS03-350" manufactured by Central Glass Co., Ltd.

[0037] [Preparation of Butyl Rubber Pressure-Sensitive Adhesive Composition] For each Example and Comparative Example, the components were mixed in the amounts shown in the table using a 3-liter kneader mixer at 110°C for 1 hour to obtain a kneaded product that was a butyl rubber pressure-sensitive adhesive composition. The resulting kneaded product was then processed into a tape shape with a width of 25 mm and a thickness of 1 mm using an extruder with a die temperature set to 70°C to produce an adhesive tape.

[0038] [Table 1]

[0039] [Table 2]

[0040] [Table 3]

[0041] [Table 4]

[0042] [Table 5]

[0043] [evaluation] The adhesive properties were evaluated according to the following method, and the results are shown in Tables 1 and 2. <Adhesiveness (adhesive strength)> A test piece was obtained by attaching adhesive tape (one side of which was lined with a 100 μm thick PET film) cut into a width of 15 mm, length of 100 mm, and thickness of 1 mm to a ceramic tile cut into a width of 30 mm and length of 125 mm. This test piece was pressed back and forth with a 2 kg rubber roller, and after leaving it for 20 minutes, the adhesive tape was peeled off in a 180° direction at a rate of 300 mm / min, and the adhesive strength was measured, and the adhesiveness was evaluated according to the following criteria. Note that the higher the adhesive strength, the better the adhesiveness. ◎: Adhesive strength is 30N / 15mm or more ○: Adhesive strength is 25N / 15mm or more, less than 30N / 15mm △: Adhesive strength is 20N / 15mm or more, less than 25N / 15mm ×: Adhesive strength is less than 20N / 25mm

[0044] <Tackiness> An adhesive tape (one side of which was backed with a PET film (100 μm thick)) processed into a shape of 15 mm × 100 mm length × 1 mm thickness was obtained as a test piece. The adhesive side of this test piece (the side not backed with the PET film) was measured using a probe tack tester (probe diameter 25 mm, manufactured by Nichiban Co., Ltd.). 2 The tackiness was measured under the following conditions: thrust stop time: 0.1 seconds, thrust speed: 10 mm / second, load: 9.8 g, and the tackiness (stickiness) was evaluated according to the following criteria. ◎: Probe tack value is 5N / 25mm 2 End ○: Probe tack value is 4N / 25mm 2 Above, 5N / 25mm 2 less than △: Probe tack value is 2N / 25mm 2 Above, 4N / 25mm 2 less than ×: Probe tack value is 2N / 25mm 2 less than

[0045] <Creep resistance (holding force, shear force)> Two stainless steel plates (SUS304: 100mm x 30mm x 2.5mm thick) were placed between them with adhesive tape (without PET film) cut to a width of 25mm, length of 80mm, and thickness of 1mm. One of the stainless steel plates was fixed in place, and a 200g weight was hung from the other stainless steel plate (see Figure 1A). The plate was then left at 50°C for one hour. After one hour, the amount of slippage (the distance the plate slipped) relative to the other stainless steel plate was measured (see Figure 1B), and creep resistance was evaluated according to the following criteria. Note that a smaller amount of slippage indicates better creep resistance. ◎: Misalignment is less than 2 mm ○: Misalignment is 2mm or more and less than 4mm △: Misalignment is 4mm or more and less than 6mm ×: Misalignment is 6mm or more, or falls

Claims

1. A butyl rubber pressure-sensitive adhesive composition, 100 parts by mass of butyl rubber; 230 to 595 parts by mass of an inorganic compound; 50 to 170 parts by mass of a softener; 10 to 55 parts by mass of a fibrous organic compound; Including, The inorganic compound contains 5% by mass or more of a clay mineral, A butyl-based rubber pressure-sensitive adhesive composition, wherein the proportion of the butyl-based rubber to all rubber components contained in the butyl-based rubber pressure-sensitive adhesive composition is 50 mass % or more.

2. The butyl-based rubber pressure-sensitive adhesive composition according to claim 1 , wherein the inorganic compound contains 30% by mass or more of a clay mineral.

3. 2. The butyl rubber pressure-sensitive adhesive composition according to claim 1, wherein the average fiber length of the fibrous organic compound is 0.5 to 10 mm.

4. A pressure-sensitive adhesive tape comprising the butyl rubber pressure-sensitive adhesive composition according to any one of claims 1 to 3.

5. A waterproof sheet for roofs, comprising: a pressure-sensitive adhesive layer containing the butyl rubber pressure-sensitive adhesive composition according to any one of claims 1 to 3; and a waterproof sheet laminated on the pressure-sensitive adhesive layer.

6. A bonded structure comprising a roof tile and a waterproof sheet bonded together with the butyl rubber pressure-sensitive adhesive composition according to any one of claims 1 to 3.

7. A butyl rubber pressure-sensitive adhesive composition for fixing a toilet, which is used for fixing a toilet to a floor, using the butyl rubber pressure-sensitive adhesive composition according to any one of claims 1 to 3.

8. A joint formed by joining a toilet bowl and a floor with the adhesive tape according to claim 4.

9. A joined body, comprising a toilet bowl and a floor joined together with the pressure-sensitive adhesive composition for fixing a toilet bowl according to claim 7.

Images