JP2020050718A - Elastomer composition for bath supply and bath supply - Google Patents

Abstract

To provide an elastomer composition for bath supply excellent in long term antifungal performance and capable of preventing discoloration in applications under bath environment, and a bath supply.SOLUTION: The elastomer composition for bath supply contains a thermoplastic elastomer, thiabendazole and a pyrithione metal salt. The thermoplastic elastomer may contain total 0.1 to 10 pts.mass of the thiabendazole and the pyrithione metal salt when whole is 100 pts.mass. The bath supply consists of an elastomer composition for bath supply, or has a base material (core material 11b) and a soft part (coated layer 12a) integrally molded on the base material, and the soft part (coated layer 12a) consists of the elastomer composition for bath supply.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an elastomer composition for bathroom articles and bathroom articles. More specifically, the present invention relates to an elastomer composition for bathroom articles and a bathroom article used in a bathroom.

  In the bathroom, the bath supplies are bathed in bath water or bath water containing nutrients, and are kept in a wet state for a long time. It is inevitable that mold will appear on bathroom supplies that are not addressed. Bathroom articles utilizing metal materials such as stainless steel and copper and ceramic materials have been known for the purpose of suppressing the generation of mold or making it easy to remove even if they are generated. However, for elderly people whose physical strength, such as body temperature control function, grip strength, balance adjustment power, etc., has deteriorated, bathroom products using these materials have problems such as cold, heavy, slippery, etc., and with the aging of society, There is a need for a bathroom article using a soft material such as rubber or a thermoplastic elastomer that can impart properties such as a gentle touch, warmness, lightness, and slip resistance. However, these soft materials have the property that mold hyphae easily penetrate and are easily attacked by mold. As a countermeasure, a fungicide treatment using a fungicide is known. Patent Documents 1 and 2 below are known as fungicides.

JP-T-2015-516381A JP-A-7-41409

Patent Literature 1 discloses that soft vinyl chloride resin, which has been frequently used as a soft thermoplastic resin for a long time, tends to grow mold due to a high addition ratio of a plasticizer and other additives, and thiabendazole (hereinafter, referred to as a fungicide). , Simply referred to as “TBZ”) and an iodine-based fungicide are disclosed.
Patent Document 2 discloses that when a dodecylbenzenesulfonate salt of TBZ and an iodine-based fungicide are used in combination, high toxicity can be exhibited over a long period of time while low toxicity to humans and animals can be exhibited. It is disclosed that it is effective for mold prevention.

  However, according to the study by the present inventors, in a bathroom environment that remains wet for a long time and is not exposed to strong light such as direct sunlight, bathroom articles using an iodine-based fungicide are yellowing. I knew to do. That is, it has been found that an iodine-based antifungal agent cannot be blended in an elastomer composition for bathroom articles which is supposed to be used in a bathroom where water is inevitable and has little light.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an elastomer composition for bathroom articles and a bathroom article that are excellent in antifungal performance and can prevent discoloration when used in a bathroom environment.

The present invention is as follows.
[1] An elastomer composition for bathroom articles, comprising a thermoplastic elastomer, thiabendazole and a metal salt of pyrithione.
[2] The elastomer composition for bathroom articles according to [1], wherein the total amount of the thiabendazole and the pyrithione metal salt is 0.05 to 10 parts by mass, based on 100 parts by mass of the entire thermoplastic elastomer.
[3] The elastomer composition for bathroom articles according to [1] or [2], wherein the molar ratio of the thiabendazole and the metal salt of pyrithione is 1/9 to 9/1.
[4] The elastomer composition for bathroom articles according to any one of [1] to [3], wherein the thermoplastic elastomer is at least one of a styrene-based copolymer and an ethylene-based copolymer.
[5] The styrene-based copolymer is at least one selected from the group consisting of a copolymer of a vinyl aromatic monomer and a diene-based monomer, and a hydrogenated product thereof, and the ethylene-based copolymer is Is at least one selected from the group consisting of a copolymer of a vinyl monomer and an α-olefin monomer, a copolymer of a vinyl monomer and an α-substituted vinyl monomer, and a hydrogenated product thereof [4]. The elastomer composition for bathroom articles according to the above.
[6] The elastomer composition for bathroom articles according to any one of [1] to [5], wherein the pyrithione metal salt is at least one of zinc pyrithione and sodium pyrithione.
[7] The elastomer composition for bathroom articles according to any one of [1] to [6], wherein the thiabendazole and the pyrithione metal salt are contained as granules having a volume-based median diameter of 1 to 100 µm. Stuff.
[8] The elastomer composition for bathroom articles according to any one of [1] to [7], comprising an inorganic metal-based antibacterial agent.
[9] The elastomer composition for bathroom articles according to any one of [1] to [8], which does not contain a softener and has an A hardness of 20 to 90.
[10] A bathroom article comprising the elastomer composition for a bathroom article according to any one of [1] to [9].
[11] The bathroom article according to [10], which is foam-molded.
[12] A bathroom article having a base material and a soft part integrally formed with the base material, wherein the soft part is an elastomer for a bathroom article according to any one of [1] to [9]. A bathroom article comprising the composition.
[13] The bathroom article according to [12], wherein the soft part is formed by foaming.

The elastomer composition for bathroom articles of the present invention contains a thermoplastic elastomer, thiabendazole and a metal salt of pyrithione. As a result, it is possible to prevent discoloration while exhibiting excellent antifungal performance for a long time in a bathroom environment.
Furthermore, when the elastomer composition for bathroom articles of the present invention contains 0.05 to 10 parts by mass of thiabendazole and pyrithione metal salt in total when the thermoplastic elastomer is 100 parts by mass as a whole, In addition to the above-mentioned effect that discoloration can be prevented while exhibiting excellent antifungal performance over a long period of time, the appearance quality can be maintained by suppressing the occurrence of bloom over a long period of time.
Further, since the bathroom article of the present invention is composed of the above-mentioned elastomer composition for bathroom article, the effect of the above-mentioned elastomer composition for bathroom article can be obtained as it is even in a bathroom article.

It is a perspective view which shows an example of the handrail for bathtubs. It is sectional drawing which shows an example of AA cross section in FIG. It is explanatory drawing which shows an example of the usage mode of the handrail for bathtubs. It is a perspective view showing an example of a shower bench. FIG. 5 is an exploded perspective view of the shower bench of FIG. 4. It is a perspective view which shows an example of a bathtub stand. It is an exploded perspective view of the bathtub stand of FIG. It is explanatory drawing which shows an example of the usage mode of a bathtub stand. It is explanatory drawing which shows the other example of the usage mode of a bathtub stand.

[1] Elastomer composition for bathroom articles In the present invention, "bathroom" is a general term for facilities provided for the purpose of bringing hot water or water into contact with the human body, and includes showers, bathtubs, washing facilities with a drainage function, and the like. Means at least one.
Further, "bathroom supplies" is a general term for items used in bathrooms. Therefore, for example, a handrail for a bathtub, a handrail for a bathroom, a shower bench, a bathroom chair, a bathtub, a shower head, a bathroom mat, and components constituting these can be mentioned, but not limited thereto.

  The elastomer composition for bathroom articles of the present invention contains a thermoplastic elastomer, thiabendazole and a metal salt of pyrithione.

(1) Thermoplastic Elastomer The above-mentioned “thermoplastic elastomer” (hereinafter, also simply referred to as “TPE”) is a main component constituting the elastomer composition for bathroom articles, and usually has a mass of 50% by mass of the entire elastomer composition for bathroom articles. Accounting for more than%.
The type of TPE contained in the elastomer composition for bathroom articles is not limited, and examples thereof include a styrene-based copolymer, an olefin-based copolymer, a polyamide-based copolymer, a polyester-based copolymer, and a urethane-based copolymer. No. These may be used alone or in combination of two or more.

  Among them, the olefin-based copolymer includes an ethylene-based copolymer (ethylene-based copolymer rubber). Further, a thermoplastic elastomer in which an olefin-based resin (polypropylene, polyethylene, or the like) is used as a matrix and an ethylene-based copolymer is dispersed and contained in the matrix is included.

  Among the above, the thermoplastic elastomer used in the elastomer composition for bathroom articles of the present invention is preferably at least one of a styrene-based copolymer and an ethylene-based copolymer. In addition, these copolymers need only be able to exhibit elastomeric properties, and the copolymer form is not limited, and may be a block copolymer or a random copolymer.

The “styrene-based copolymer” is a copolymer having a structural unit derived from an aromatic vinyl compound. Usually, a block containing a structural unit derived from an aromatic vinyl compound constitutes a hard segment.
The monomer constituting the hard segment may be any aromatic vinyl compound, and the type thereof is not limited. For example, styrene, α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, Examples thereof include alkyl-substituted styrene such as 1,3-dimethylstyrene, vinylnaphthalene, and vinylanthracene. These aromatic vinyl compounds may be used alone or in combination of two or more.

  On the other hand, the block constituting the soft segment is only required to exhibit elastomeric properties and function as a soft segment, and may be formed using any monomer, but it is preferable to use a conjugated diene. . Conjugated dienes that form such soft segments include butadiene, isoprene, chloroprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-octadiene, and 4,5. -Diethyl-1,3-octadiene, 3-butyl-1,3-octadiene, 1,3-hexadiene, 1,3-cyclohexadiene and the like. These conjugated dienes may be used alone or in combination of two or more.

  Examples of such a styrene copolymer include a styrene-isoprene-styrene block (SIS) copolymer, a styrene-butadiene-styrene block (SBS) copolymer, and a styrene-ethylenebutylene-styrene block (SEBS) copolymer. And a styrene-ethylene propylene-styrene block (SEPS) copolymer. Further, some or all of the constituent units derived from styrene of the exemplified copolymers can be replaced with constituent units derived from styrene derivatives such as α-methylstyrene. In addition, these exemplified copolymers may be hydrogenated products. Such styrenic copolymers may be used alone or in combination of two or more.

  Specific examples of the styrene-based copolymer (styrene-based thermoplastic elastomer) include "Clayton G" (G1642, G1652, G1730, etc.) manufactured by Clayton Polymer Japan, and "Clayton D" manufactured by Clayton Polymer Japan. (D1101, D1102, D1155, D1192, D1161, D1171, DKX405, DKX410, DKX415, etc.), a product name “JSR-TR” (JSR-TR1086, JSR-TR1600, etc.) manufactured by JSR, and a product name manufactured by JSR. "JSR-SIS", trade name "Dynaron" manufactured by JSR Corporation, trade name "Tuftec" (Tuftec H series and Tuftec P series, etc.) manufactured by Asahi Kasei Corporation, trade name "Tafprene" (Tafprene A, Tufprene manufactured by Asahi Kasei Corporation) 125, Tufprene 126S, etc. Asahi Kasei's product name "Asaprene", Asahi Kasei's product name "Solprene", Kuraray's product name "Septon", Kuraray's product name "Hibler", Sumitomo Chemical's product name "Espo" Rex SB ", Mitsubishi Chemical Corp. product name" Rabalon ", Denki Kagaku product name" Electric STR ", Zeon Corporation product name" Quintac ", Kentechnos product name" Leosum Mari ", etc. Is mentioned. These may be used alone or in combination of two or more.

The “ethylene copolymer” is a copolymer having a structural unit derived from ethylene. That is, for example, a copolymer of ethylene and a vinyl monomer, a copolymer of ethylene and an α-substituted vinyl monomer, a copolymer of ethylene and an α-olefin monomer (for example, an α-olefin having 3 to 20 carbon atoms), and the like. included. These may be used alone or in combination of two or more.
Among the above, examples of the vinyl monomer include vinyl acetate, acrylic acid, and acrylate. Examples of the α-substituted vinyl monomer include methacrylic acid and methacrylic acid ester. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 1-hexane, 4-methyl-1-pentene, 1-heptene, 1-octene and the like. These may be used alone or in combination of two or more.

  Therefore, more specifically, as the ethylene-based copolymer, ethylene-vinyl acetate copolymer (EVA), ethylene-propylene copolymer (EPR), ethylene-propylene-diene copolymer (EPDR), ethylene -Propylene-ethyldenorbornene copolymer, ethylene-propylene-dicyclopentadiene copolymer, ethylene-propylene-1,4 hexadiene copolymer and the like. These may be used alone or in combination of two or more. The ethylene-based copolymer also includes a copolymer having a monomer derived from a conjugated diene monomer. Specific examples include an ethylene-propylene-ethylidene copolymer and an ethylene-propylene-diene copolymer. These may be used alone or in combination of two or more.

  Among the above, specific examples of the ethylene-vinyl acetate copolymer include, among others, Tosoh's trade name "Ultracene", Kuraray's trade name "Eval", and Mitsui / Dupont Polychemical's trade name " Evaflex ”and the like. These may be used alone or in combination of two or more.

(2) Thiabendazole and metal salt of pyrithione The above-mentioned thiabendazole (hereinafter, also simply referred to as “TBZ”) and metal salt of pyrithione (hereinafter, also simply referred to as “MPT”) are fungicidal components in the elastomer composition for bathroom articles of the present invention. In some cases, the thiabendazole and the metal salt of pyrithione are present together in the elastomer composition for bathroom articles of the present invention.

  The inventors knew that each of thiabendazole and pyrithione metal salt alone was excellent as an antifungal component, but as a result of intensive studies, it was found that by using thiabendazole and pyrithione metal salt together, each of them was used. The inventor has found that the effect is not only an effect of merely collecting the components but also a synergistically excellent effect. In other words, while each component alone cannot withstand the durability test, when used together, it can withstand the durability test, exhibiting excellent antifungal performance for a long time in the bathroom environment I knew I could do it. This finding is demonstrated in the examples below.

The above “thiabendazole” (TBZ) is a compound represented by the following chemical formula (1).

This TBZ is known to have low skin irritation, low solubility in water, and excellent stability, but the combined use with MPT increases the durability in a bathroom environment synergistically. It is not known.
Of course, instead of part or all of TBZ, a TBZ derivative (a compound in which a substituent is introduced into each part of TBZ) can be used as long as it exhibits the same antifungal performance.

このＭＰＴも、ＴＢＺと同様に、人体への害が少なく、皮膚刺激性が小さく、且つ、水への溶解度が小さく、安定性に優れていることが知られているが、ＴＢＺとの併用により、浴室環境における耐久性が相乗的に高くなることは知られていない。 The “pyrithione metal salt” (MPT) is a compound represented by the following chemical formula (2) or (3). In chemical formula (2) showing MPT, “M ¹ ” represents a metal ion, and in chemical formula (3), “M ² ” represents a metal ion.

This MPT is also known to be less harmful to the human body, less irritating to the skin, less soluble in water, and superior in stability, similarly to TBZ. It is not known that durability in a bathroom environment is synergistically increased.

The type of metal forming the metal ions (M ¹ and M ² ) constituting the MPT is not limited as long as the anti-mold performance can be exhibited. For example, as M ¹ , manganese (Mn), iron (Fe), nickel (Ni), zinc (Zn) and the like. As the ^{M 2,} and lithium (Li), sodium (Na), potassium (K) and the like. These may be used alone or in combination of two or more.
In addition, as a matter of course, instead of part or all of the MPT, an MPT derivative (a compound in which a substituent is introduced into each part of the MPT) can be used as long as the same antifungal property is exhibited.

In the elastomer composition for bathroom articles of the present invention, as the MPT, among the above, zinc bis [1,2-dihydro-2-thioxopyridine-1-olate] wherein M ¹ is Zn (so-called zinc pyrithione) ( The following chemical formula (4)) and 2- (sodiothio) pyridine-1-oxide (so-called sodium pyrithione) (see the following chemical formula (5)) are preferable from the viewpoint of fungicidal performance. Further, these are particularly preferable from the viewpoint of obtaining the effect of the combined use with TBZ. Furthermore, among these, in the elastomer composition for bathroom articles of the present invention, zinc pyrithione (hereinafter, also simply referred to as “ZPT”) is particularly preferable from the viewpoint of obtaining the effect of the combined use with TBZ.

  These TBZ and MPT may be contained in any ratio to each other. For example, it is preferable that TBZ: MPT is contained in a molar ratio of 1: 9 to 9: 1. Within this range, the effect of using these in combination, that is, the effect of maintaining high fungicidal performance in an environment in contact with water can be obtained. The ratio is more preferably 1: 7 to 7: 1, further preferably 1: 5 to 5: 1, and particularly preferably 1: 4 to 4: 1.

TBZ is known to have low skin irritation and excellent stability, but slightly dissolves in water. For this reason, when TBZ is used in an environment where it comes into contact with water, the antifungal performance gradually decreases. This is shown in an example (complex deterioration test) described later.
MPT is also known to be less harmful to the human body, less irritating to the skin, and superior in stability, similar to TBZ, but the portion other than M is easily water-soluble by hydrolysis. (Pyridine-N-oxide-2-sulfonic acid represented by the following chemical formula (6) or 2-pyridinesulfonic acid represented by the following chemical formula (7)). For this reason, if MPT is used in an environment that comes into contact with water, the anti-mold performance will gradually decrease. This is also shown in an example (complex deterioration test) described later.

On the other hand, as shown in Examples described later, when TBZ and MPT are used in combination, the fungicide performance does not decrease even when used in an environment in contact with water, or each is used alone. It shows higher mold resistance than the case. The following mechanism can be considered for this reason.
That is, the components represented by the chemical formulas (6) and (7) have a sulfonic acid group. On the other hand, TBZ is a basic substance having an imidazole structure. For this reason, in a bathroom environment that comes into contact with water, the components represented by the chemical formulas (6) and (7) eluted from the MPT and the TBZ form salts or associated substances and are prevented from flowing out, A possible mechanism is that it can remain on the surface of the bathroom article elastomer composition or bathroom article of the present invention. This mechanism is supported by the fact that the closer the molar ratio between TBZ and MPT is to 1/1, the higher the antifungal property is shown in the composite deterioration test in the examples described later.

  TBZ and MPT may be separately contained in the elastomer composition for bathroom articles of the present invention. However, TBZ and MPT are contained as granules containing both of them so that TBZ and MPT coexist. Preferably. That is, a mixed granulated product of TBZ and MPT is also preferable for exhibiting the above-mentioned effects. Since these two types of antifungal components are formed into one granulated material, each antifungal component is dispersed alone in the elastomer composition for bathroom articles of the present invention. In addition to exhibiting a higher antifungal property, the sustained release can be controlled to a higher degree by granulation. For this reason, it is possible to exhibit excellent antifungal performance for a longer period in a bathroom environment.

  The form of the granulated product of TBZ and MPT is not limited. For example, a granulated product obtained by solidifying only the powders of TBZ and MPT, or a granulated product obtained by solidifying the powders of TBZ, MPT and the extender can be used. It can be a thing. Alternatively, TBZ and MPT can be dispersed in a polymerization liquid and then polymerized to form granules as polymer particles incorporating TBZ and MPT. Further, a granulated product in which TBZ and MPT are supported on a carrier may be obtained. As the carrier, an inorganic substance or an organic substance may be used. Further, a granulated product by a method other than these may be used. These may be used alone or in combination of two or more.

The size of the granules including TBZ and MPT is not limited, but may be, for example, 1 μm or more and 100 μm or less in terms of volume-based median diameter. By setting the volume-based median diameter to 1 μm or more, the dispersibility of the granulated material is improved, and the effect can be more remarkably obtained. That is, a high synergistic effect due to the coexistence of TBZ and MPT can be more effectively exerted. On the other hand, by setting the volume-based median diameter to 100 μm or less, the surface property of a bathroom article obtained by using the elastomer composition for a bathroom article of the present invention can be improved.
This volume-based median diameter can be further set to 5 μm or more and 80 μm or less, and further can be set to 10 μm or more and 50 μm or less.

  According to JIS Z8825: 2013 (particle size analysis-laser diffraction / scattering method), the volume-based median diameter is measured using a laser diffraction / scattering type particle size distribution analyzer, ion-exchanged water as a measurement solvent, and a measurement object. The refractive index of the particles is set to 0, and the refractive index of water as a dispersion medium is set to 1.33. The light scattering pattern is calculated as a value of d50 in the particle size distribution converted on a volume basis.

Further, the elastomer composition for bathroom articles of the present invention may contain the thermoplastic elastomer, TBZ and MPT as described above, and the content of TBZ and MPT is not limited. For example, 100 parts by mass of the entire thermoplastic elastomer is used. In this case, TBZ and MPT can be contained in a total amount of 0.05 to 10 parts by mass. Within this range, excellent mold resistance can be exhibited.
The content of TBZ and MPT is more preferably 0.05 to 5 parts by mass, more preferably 0.05 to 3 parts by mass, and more preferably 0.05 to 2.5 parts by mass. More preferred. In particular, in the range of 0.05 to 2.5 parts by mass, bloom can be suppressed and used. Furthermore, in the range of 0.1 part by mass or more and 1.3 parts by mass or less, blooming can be prevented, and extremely excellent appearance quality can be maintained for a long period of time.

(3) Other Components The elastomer composition for bathroom articles of the present invention can contain other components in addition to the thermoplastic elastomer, TBZ and MPT. Other components include inorganic metal antibacterial agents. Inorganic metal-based antibacterial agents are antibacterial agents that contain an antibacterial metal component in a solid state (powder, film, plating, plate, etc.), ionic state (solution, etc.), etc. It is a composed antibacterial agent. Examples of the antibacterial metal component include copper, silver, nickel, magnesium, zinc, platinum, and gold. These may be used alone or in combination of two or more.

As the antibacterial metal component, the above-mentioned metals may be used as they are, or they may be supported on a separate carrier and function as an inorganic metal antibacterial agent as a whole. When a carrier is used, the type of the carrier is not limited. For example, silicates (zeolite, calcium silicate, magnesium metasilicate, etc.), silica gel, glass, phosphates (calcium phosphate, zirconium phosphate, etc.), metal oxides (oxidized) Titanium, zinc oxide, etc.), titanates (eg, potassium titanate), ceramics and the like. These may be used alone or in combination of two or more.
Examples of the antibacterial metal component include Novalon (Toa Gosei), Bactekiller (Kanebo), Baicom AK (Otsuka Chemical), Zeomic (Sinanen Zeomic), Silwell (Fuji Silysia), and the like.

As another component, a filler can be further used. The type of the filler is not limited, and examples thereof include an inorganic filler, an organic filler, and a fibrous filler. These may be used alone or in combination of two or more.
Among them, inorganic fillers include carbonates (calcium carbonate, magnesium carbonate, barium carbonate, etc.), sulfates (barium sulfate, calcium sulfate, calcium sulfite, etc.), and hydroxides (calcium hydroxide, magnesium hydroxide, water). Diatomaceous earth, talc, etc. in addition to oxides (magnesium oxide, titanium oxide, iron oxide, zinc oxide, alumina, silica, zirconia), silicates (calcium silicate, etc.), phosphates (calcium phosphate), etc. Dolomite, mica, bentonite, gypsum, calcined clay, white carbon, carbon black, metal powder, stone powder, slag, fly ash and the like. Examples of the organic filler include wood powder, coconut powder, walnut powder, and the like. Examples of the fiber filler include natural fibers (cotton, hemp, animal hair), resin fibers, and inorganic fibers (glass fibers and the like). These may be used alone or in combination of two or more.

  The elastomer composition for bathroom articles of the present invention may be obtained by any method, and as a result, the above-mentioned thermoplastic elastomer, TBZ and MPT may be contained. Specifically, using a well-known kneader (mixer) such as a Banbury mixer, a Brabender mixer, a single-screw or twin-screw extruder, a kneader, and a mixing roll, for example, a pellet-shaped thermoplastic elastomer, TBZ and MPT And are mixed under conditions where the thermoplastic elastomer melts. In order to enhance the uniformity of the components in the composition, it is also possible to mix TBZ and MPT with at least a part of other components in advance before putting the mixture into the kneader. It is also possible to mix them in advance so that the plastic elastomer does not melt. For such mixing, a mixer having a relatively low shearing force such as a super mixer, a Henschel mixer, a ribbon mixer, or a conical mixer is suitable, and TBZ and MPT can be previously uniformly adhered to the surface of the thermoplastic elastomer. Therefore, after kneading, a more homogeneous elastomer composition for bathroom articles can be obtained.

  Although the hardness of the elastomer composition for bathroom articles of the present invention is not limited, for example, in a state where a softener is not contained, the hardness can be in a range of 20 or more and 90 or less in A hardness shown in JIS K6253. By setting the A hardness to 20 or more, excellent slip resistance can be obtained. On the other hand, by setting it to 90 or less, excellent grip properties can be obtained while maintaining sufficient softness. The A hardness can be further set to 30 or more and 90 or less, particularly 40 or more and 85 or less.

[2] Bathroom article The bathroom article of the present invention is made of an elastomer composition for a bathroom article or has a base material and a soft part integrally molded with the base material, and the soft part is an elastomer for a bathroom article. Consists of a composition.
The bathroom product is a product used in the bathroom, and is not particularly limited as long as the product is made of the elastomer composition for bathroom product of the present invention, or has a soft part made of the elastomer composition for bathroom product of the present invention. Instead, various bathroom supplies can be obtained.

  The soft part integrally formed with the base material means that the soft part is formed integrally with the base material. That is, for example, by insert molding the base material as a core material, a form in which a soft portion covering the base material is formed, the base material is dipped in the molten elastomer composition, then pulled up, and the elastomer adhered to the base material is removed. Examples include a dip-coating form in which the composition is solidified, and a curtain-coating form in which the elastomer composition adhered to the base material is dropped on a molten elastomer composition and then solidified. Further, the base material is harder than the soft part. Therefore, for example, the member can function as a core material.

(1) Bathtub Handrail The bathtub handrail 1 (see FIGS. 1 to 3) includes a grip portion 11 and a vise-type saddle-shaped mounting portion 15.
Among these, the grip part 11 has a pipe-shaped core material 11b as a base material. Further, it has a coating layer 11a as a soft part for coating the core material 11b (see FIG. 2). The core material (base material) 11b and the coating layer (soft part) 11a are integrally formed by insert molding.
On the other hand, the mounting portion 15 includes a fixed member 17 to which the pair of core members 11b is inserted and fixed, a movable member 16 facing the fixed member 17, and a slide plate 18 connecting upper ends of the fixed member 17 and the movable member 16 to each other. (See FIG. 1).
A handle 19 for moving the movable member 16 in a direction facing the fixed member 17 is provided on an outer surface of the movable member 16. Further, the inner grip 12 is fixed to the outer surface of the movable member 16. The inner grip 12 includes a pipe-shaped core material (not shown) as a base material and a coating layer 12a as a soft portion that covers the core material. The core material and the coating layer 12a are integrally formed by insert molding.

Since the coating layers 11a and 12a are soft portions made of the elastomer composition for bathroom articles of the present invention, they prevent the discoloration of the coating layers 11a and 12a while exhibiting excellent antifungal performance for a long time in a bathroom environment. be able to.
The handrail 1 for a bathtub can be used, for example, in the mode shown in FIG. That is, the upper end 51 of the bathtub 50 is sandwiched between the inner surface 17a of the fixed member 17 and the inner surface 16a of the movable member 16, the handle 19 is rotated to move the movable member 16, and the inner surface 17a of the fixed member 17, The movable member 16 can be attached to the bathtub 50 by sandwiching and fixing the upper end portion 51 with the inner surface 16 a of the movable member 16.
When using the bathtub handrail 1, as shown in FIG. 3, the grip portion 11 can be gripped with both hands. Thereby, it is possible to safely enter and exit the bathtub 50. In addition, while bathing, the inner grip 12 can be gripped so that the user can safely spend time in the bathtub.

The resin component contained in the elastomer composition for bathroom articles constituting the coating layers 11a and 12a is preferably SEBS or SBS. SEBS and SBS are easily conformable to the hand, have a good tactile sensation, and have excellent slip resistance.
The floor mat 60 shown in FIG. 3 can also be formed from the bathroom composition elastomer composition of the present invention. Also in this case, it is preferable to use SEBS or SBS. The floor mat 60 made of the elastomer composition for bathroom articles of the present invention, or the floor mat 60 provided with a soft portion made of the elastomer composition for bathroom articles of the present invention exhibits excellent mold-proof performance in a bathroom environment for a long time. However, discoloration of the coating layers 11a and 12a can be prevented.

(2) Shower Bench The shower bench 2 (see FIGS. 4 and 5) includes a backrest 21, an armrest 22, a seat 23, and legs 24.
The backrest 21 includes a backrest frame 21b and a backrest cushion 21a mounted on the backrest frame 21b. The armrest part 22 includes an armrest frame 22b as a base material and an armrest grip 22a which is a soft part integrally formed by insert molding with the armrest frame 22b (see FIG. 5).
On the other hand, the seat 23 includes a seat frame 23b and a seat cushion 23a mounted on the seat frame 23b (see FIGS. 4 and 5).
Further, the leg 24 includes a leg frame 24b and a leg cover 24a attached to the leg frame 24b (see FIGS. 4 and 5).

  Among the above, the back cushion 21a, the seat cushion 23a, and the leg cover 24a are each bathroom articles made of the bathroom article elastomer composition of the present invention, and are, for example, respectively injected using a predetermined mold. It can be formed by molding. The obtained back cushion 21a, seat cushion 23a, and leg cover 24a can be joined to the corresponding parts at each part using, for example, an appropriate adhesive. Since these are composed of the elastomer composition for bathroom articles of the present invention, they can prevent discoloration while exhibiting excellent antifungal properties for a long time in a bathroom environment.

Furthermore, it is preferable that the resin component contained in the bathroom article elastomer composition constituting the armrest grip 22a is SEBS or SBS. SEBS and SBS are easily conformable to the hand, have a good tactile sensation, and have excellent slip resistance.
Further, the resin component contained in the bathroom article elastomer composition constituting the back cushion 21a and the seat cushion 23a is preferably EVA. In particular, the back cushion 21a and the seat cushion 23a are provided with the above-described antifungal component. Preferably, the foamed EVA is contained. By using the foamed EVA, the cushioning property is excellent, the slip resistance is improved, and the touch feeling is soft, so that it is easy to relax.
The resin component contained in the bathroom article elastomer composition constituting the leg cover 24a is preferably SBR. SBR has not only slip resistance but also excellent strength.

(3) Bathtub base The bathtub base 3 (see FIGS. 6 to 9) includes a pedestal portion 31 and legs 32 connected below the pedestal portion 31.
The pedestal part 31 includes a pedestal frame 31b and a soft top plate 31a joined on the pedestal frame 31b.
Further, the leg 32 includes a leg frame 32b and a leg cover 32a attached to the leg frame 32b.
Among the above, the top plate 31a and the leg cover 32a are bathroom articles made of the bathroom article elastomer composition of the present invention, and can be formed by, for example, injection molding using a predetermined mold. The obtained top plate 31a can be joined to a corresponding portion of the pedestal frame 31b, and the obtained leg cover 32a can be joined to a corresponding portion of the leg frame 32b, for example, using an appropriate adhesive.

Further, the resin component contained in the elastomer composition for bathroom articles constituting the top plate 31a is preferably EVA, and in particular, the top plate 31a is preferably foamed EVA containing the above-described antifungal component. By using the foamed EVA, the cushioning property is excellent, the slip resistance is improved, and the touch feeling is soft, so that it is easy to relax. Further, the resin component contained in the bathroom article elastomer composition constituting the leg cover 32a is preferably SBR. SBR has not only slip resistance but also excellent strength.
For example, as shown in FIG. 8, such a bathtub table 3 can be placed on a floor near the bathtub 50 and used as a stepping board when taking a bath. Further, for example, as shown in FIG. 9, the bathtub table 3 can be placed on the bottom of the bathtub 50 and used as a chair in the bathtub 50.

The bathroom article may be a non-foamed product, but may be a foamed product. In that case, the above-mentioned elastomer composition for bathroom articles of the present invention can be appropriately foamed by incorporating components such as a foaming agent necessary for foaming.
When a foaming agent is used, its type is not limited, and any foaming agent may be used as a result. Examples of the foaming agent include an inorganic foaming agent, an organic foaming agent, and thermally expandable fine particles. Examples of the inorganic foaming agent include ammonium carbonate, ammonium hydrogen carbonate, sodium hydrogen carbonate (baking soda), ammonium nitrite, sodium borohydride, and azides.
As the organic blowing agent, azodicarbonamide (ADCA), dinitrosopentamethylenetetramine (DPT), p, p-oxybisbenzenesulfonylhydrazide (OBSH), azobisisobutyronitrile (AIBN), or the like can be used. it can. These may be used alone or in combination of two or more.

However, as described above, the elastomer composition for bathroom articles contains both TBZ and MPT. When both TBZ and MPT are included, foaming may be insufficient depending on the combination of foaming agents. Therefore, the amount of the foaming agent may be appropriately adjusted, or a foaming agent that does not cause insufficient foaming may be used. Specifically, it is preferable to use a foaming agent other than DTP together or to use a foaming agent other than DTP without using only DPT.
When using a foaming agent, the amount ratio can be an appropriate value, for example, when the entire thermoplastic elastomer is 100 parts by mass, the foaming agent, from the viewpoint of increasing the foaming volume, 0.1 mass Parts or more, preferably 0.3 parts by weight or more, more preferably 0.5 parts by weight or more. In addition, from the viewpoint of obtaining fine foam cells, the amount is 20 parts by mass or less, preferably 10 parts by mass or less, more preferably 5 parts by mass or less.

Hereinafter, examples of the elastomer composition for bathroom articles and bathroom articles according to the present invention will be described.
[1] Evaluation Test for Elastomer Composition for Bathroom Goods (1) Mold Prevention Test Each of the elastomer compositions for bathroom goods containing the anti-fungal components (various and respective mixing ratios) shown in Tables 1 to 3 was prepared. . Thereafter, a test piece was prepared using these compositions, and a fungicide test was performed (Examples 1 to 8 and Comparative Examples 1 to 12). The test method is as follows.

(1-1) Preparation of Test Specimen Each component shown in Tables 1 to 3 was molded into a 2 mm-thick plate shape or a 5 mm-thick foamed molded body in the following manner. A test piece was cut out from the plate-shaped product or the foamed product each time and used.
At the time of the above-mentioned kneading, the following components were mixed for each thermoplastic elastomer. The thiabendazole and pyrithione metal salts were contained as granules which were wet-supported on porous calcium silicate (Florite R manufactured by Tomita Pharmaceutical Co., Ltd.).
The granulated product was dispersed in ion-exchanged water, and the particle size distribution was measured using a laser diffraction type particle size distribution analyzer “MS2000” manufactured by Malvern Company. As a result, the volume-based median diameter was 25 μm.
The molar ratio was calculated based on the molecular weight of thiabendazole as 201 and the molecular weight of zinc pyrithione as 318.
"SEBS kneading": PP (polypropylene) 10 parts by mass, calcium carbonate 10 parts by mass, blue pigment (copper phthalocyanine pigment)
"SBS kneading": PP (polypropylene) 10 parts by mass, blue pigment (copper phthalocyanine pigment)
"SBR kneading": 10 parts by mass of calcium carbonate, 1.8 parts by mass of di (t-butylperoxyisopropyl) diisopropylbenzene, blue pigment (copper phthalocyanine pigment)
"EVA kneading": 2 parts by mass of a foaming agent (azodicarbonamide), 1 part by mass of stearic acid, 0.6 part by mass of a crosslinking agent, 0.5 part by mass of zinc oxide, blue pigment (copper phthalocyanine pigment)

The production mode of the plate-shaped article is as follows.
(1) Examples and Comparative Examples Using SEBS, SBS or SBR In each thermoplastic elastomer (SEBS, SBS or SBR) pellet, a blue pigment, thiabendazole, zinc pyrithione, granules containing these, or diiodomethyl -After blending any antifungal component selected from p-tolylsulfone and other components, stir with a conical mixer for 10 minutes to attach each additive to the surface of the thermoplastic elastomer pellets I let it.
Next, the pellets to which each additive is attached are melt-kneaded using an extruder (continuous kneader) under the following conditions, extruded into strands, and cooled to a thickness of about 3 mm using a cutter while being cooled in cold water. The pellet was cut to a length of about 3 mm to obtain a pellet made of the elastomer composition for bathroom articles.
(Melting and kneading conditions)
Extruder: Product name “KZW32TW-60MG-NH” manufactured by Technobell Co., Ltd.
Cylinder temperature: 180-230 ° C
Screw rotation speed: 300r / min
Thereafter, the obtained pellets comprising the elastomer composition for bathroom articles were injection-molded under the following conditions to prepare a plate having a width of 125 mm, a length of 125 mm and a thickness of 2 mm.
[Injection molding conditions]
Injection molding machine: manufactured by Mitsubishi Heavy Industries, Ltd., product name "100MSIII-10E"
Injection molding temperature: 200 ° C
Injection pressure: 30%
Injection time: 10 sec
Mold temperature: 40 ° C

(2) Examples and Comparative Examples Using EVA Thermoplastic elastomer (EVA) pellets are selected from blue pigment, thiabendazole, zinc pyrithione, granules containing these, or diiodomethyl-p-tolylsulfone. After each of the antifungal components and the other components were blended, the mixture was stirred with a conical mixer for 10 minutes to cause each additive to adhere to the surface of the thermoplastic elastomer pellets.
Next, the pellets to which the respective additives were attached were injection-molded under the following conditions. Immediately after the injection was completed, the mold was opened (holding pressure: 0 sec, 0%, cooling: 0 sec) to obtain a foam molded article.
[Injection molding conditions]
Injection molding machine: manufactured by Mitsubishi Heavy Industries, Ltd., product name "100MSIII-10E"
Injection molding temperature: 200 ° C
Injection pressure: 30%
Injection time: 10 sec
Mold temperature: 40 ° C
Mold dimensions: thickness 5mm, width 95mm, length 123mm

(1-2) Test method Before imposing the following composite deterioration test, a test in accordance with JIS Z2911 (mold resistance test method) was performed on each test piece of Examples 1 to 8 and Comparative Examples 1 to 12. Imposed. That is, a suspension of the five-bacteria complex was dropped onto each test piece on the agar medium, and cultured at a predetermined temperature and humidity for 4 weeks, and the growth state of the hypha on the test product was evaluated.
Next, after the following composite deterioration test was imposed, a test in accordance with JIS Z2911 (mold resistance test method) was again applied to each test piece.

(1-3) Combined deterioration test For each test piece, the following heat resistance test, chemical resistance test, hot water test, chlorine resistance test, and imposition of five forced deterioration test items in order as a weather test are defined as one cycle. , For a total of 5 cycles.
・ Heat resistance test: Leave for 3 days in an environment of temperature 60 ° C and humidity 100% ・ Chemical resistance test: Immersion in neutral detergent at room temperature for 1 day ・ Chlorine resistance test: Bath water detergent in 50L of 40 ° C hot water (Kaosha) , One tablet with the product name “Furosui Wonder”) and immersed for 4 hours ・ Hot water test: immersed in 60 ° C. hot water for 15 hours ・ Weather resistance test: Irradiation with xenon lamp for 8 hours

(1-4) Evaluation method The following 6 levels of 0-5 were evaluated.
"0": No mold growth is observed with the naked eye or under a microscope.
"1": No mold growth was observed with the naked eye, and it was clearly confirmed under a microscope.
"2": Mold growth was observed with the naked eye, and the growth area was less than 25% of the total area of the sample.
"3": Mold growth was observed with the naked eye, and the growth area was 25% or more and less than 50% of the total area of the sample.
"4": Mycelia grow well and the growth area is 50% or more of the total area of the sample.
"5": Mycelium grew vigorously, and the entire surface of the sample was covered with mold.

(1-5) Test Results The test pieces of Examples 1 to 8 and Comparative Examples 1 to 12 were evaluated for the antifungal properties before the composite deterioration test. I was not able to admit.
After that, a composite deterioration test was imposed, and a mold prevention evaluation after the composite deterioration test was performed. As a result, as shown in Tables 1 to 3, for Examples 1 to 4, Examples 6 to 7 and Comparative Examples 9 to 12, although growth of mold under the naked eye and under a microscope was not observed, In Examples 5, 9 and Comparative Examples 1 to 8, mold growth was observed.
From this result, it can be seen that the antifungal component is affected by the composite deterioration test simulating the use environment as described above. In addition, when ZPT is compounded alone (Comparative Examples 1 to 4) and when TBZ is compounded alone (Comparative Examples 5 to 8), although excellent antifungal performance is exhibited before the composite deterioration test. It can be seen that the application of the composite deterioration test lowers the antifungal performance.
On the other hand, when ZPT and TBZ were used together (Examples 1 to 4), and when diiodomethyl-P-tolylsulfone was added (Comparative Examples 9 to 12), the change in the antifungal performance before and after the composite deterioration test was reduced. It was not recognized, indicating that excellent mold-proof durability can be exhibited in the elastomer composition for bathroom articles. Furthermore, it can be seen that the closer the molar ratio of TBZ and MPT to 1/1, the more excellent the antifungal property.

(2) Immersion test in water Immersion test in water for test pieces using each of the elastomer compositions for bathroom articles shown in Tables 1 and 3 (Examples 1 to 4 and Comparative Examples 1 to 12) Was done. The test method is as follows.
(2-1) Test Method Each of the test pieces (five each) of Examples 1 to 4 and Comparative Examples 1 to 12 was immersed in ion-exchanged water at 60 ° C. for 24 hours. It was measured using a meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name "SZ- $ 80"). Then, the amount of change in the b value of each of the five test pieces before and after immersion was measured, and the average value was shown in Table 4 as Δb.
Similarly, the test pieces (5 pieces each) of Examples 1 to 4 and Comparative Examples 1 to 12 were immersed in tap water at 60 ° C. (initial residual chlorine concentration: 0.4 mg / L) for 24 hours. Was measured using a color difference meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name “SZ- $ 80”). Then, the amount of change in the b value of each of the five test pieces before and after immersion was measured, and the average value was shown in Table 4 as Δb.

(2-2) Test Results From the results in Table 4, the Δb change (difference between Δb by tap water immersion and Δb by ion exchange water immersion) in Examples 1 to 4 and Comparative Examples 1 to 8 was all 0. It was less than 1, and no discoloration was observed. On the other hand, the change in Δb of Comparative Examples 9 to 12 was 2.40 to 3.02, and it was found that discoloration was observed in immersion in tap water.
That is, as described in the above (1-5) test results, Comparative Examples 9 to 12 showed no change in the antifungal performance before and after the composite deterioration test, and exhibited excellent antifungal durability in the elastomer composition for bathroom articles. Although it could be demonstrated, it was found that the color changed upon contact with tap water.

このジヨードメチル−ｐ−トリルスルホンから、ヨウ素イオン（Ｉ⁻、無色）が遊離され、遊離されたヨウ素イオンが酸化されてヨウ素（Ｉ_２、褐色）を形成することで変色（黄変）を生じるものと考えられる。更に、この際のヨウ素イオンの酸化は、水道水に含まれた塩素が促進したものと考えられる。従って、例えば、浴湯の消毒を目的として添加され得る次亜塩素酸化合物や塩素含有化合物等に起因して、同様の変色を来すことが考えられることから、優れた防カビ性を有するものの浴室用品用エラストマー組成物に対してジヨードメチル−ｐ−トリルスルホン等のヨウ素化合物を利用するのは難しいことが分かる。 Although the reason for the discoloration according to Comparative Examples 9 to 12 is not clear, it can be considered as follows. That is, diiodomethyl-p-tolylsulfone (iodine compound) which is a fungicide component used in Comparative Examples 9 to 12 is represented by the following chemical formula (8).

Iodide ions (I ⁻ , colorless) are released from the diiodomethyl-p-tolylsulfone, and the released iodide ions are oxidized to form iodine (I ₂ , brown), thereby causing discoloration (yellowing). it is conceivable that. Further, it is considered that the oxidation of iodine ions at this time was promoted by chlorine contained in tap water. Therefore, for example, it is thought that the same discoloration may occur due to a hypochlorite compound or a chlorine-containing compound that can be added for the purpose of disinfecting bath water. It turns out that it is difficult to use an iodine compound such as diiodomethyl-p-tolylsulfone for an elastomer composition for bathroom articles.

Since the above-mentioned discoloration does not occur in an environment where a large amount of light can be irradiated, release of iodine ions (I ⁻ ) is suppressed by light irradiation, or iodine (I ₂ ) is generated by oxidation. It is considered that discoloration does not occur even if it is reduced to iodine ion (I ⁻ ).
In this regard, the elastomer composition for bathroom articles is an elastomer used for manufacturing bathroom articles, and it is hard to expect that in a bathroom environment, light irradiation sufficient to suppress the discoloration described above will be obtained. Therefore, it is considered that an iodine compound such as diiodomethyl-p-tolylsulfone is not suitable as a fungicide component used for the elastomer composition for bathroom articles.

(3) Bloom test (3-1) Preparation of test piece In addition to Example 1 (1-1 to 1-4), as shown in Table 5, elastomers for bathroom articles of Examples 1-5 and 1-6 as shown in Table 5 A composition was made. The preparation method of the elastomer composition for bathroom articles of Examples 1-5 and 1-6 and the preparation of the test pieces are the same as those in Example 1. Thereafter, these test pieces (Examples 1-1 to 1-6) were subjected to a bloom test.

(3-2) Test method After the test piece was left in a thermo-hygrostat (temperature: 40 ° C., relative humidity: 80%) for 192 hours, the surface of the sheet was printed with black paper to which a load of 3 N (about 300 g) was applied. Was lightly rubbed, powder was blown on the sheet surface, and the presence or absence of deposits such as oil was visually observed to observe the state of occurrence of bloom.
(3-2) Evaluation method The bloom generation state was evaluated visually and the following criteria were used.
“0”: No bloom is observed.
"1": The occurrence of bloom is extremely slight.
"2": Bloom is observed.

(3-4) Test Results As shown in Table 5, it can be seen that blooming can be suppressed by adding the amount of the antifungal component to less than 1.5 parts by mass. Further, it can be seen that blooming can be prevented by setting the amount of the antifungal component to 0.5 parts by mass or less.

(4) Foaming test (4-1) Preparation of test piece The foam molded products (test pieces for foaming test) of Examples 5 to 9 and Comparative Example 13 were prepared. Then, the thickness of the foamed molded body was measured at five places near the center of the mold and 10 mm from the square, and the expansion ratio was calculated from the average value / the thickness of the molded mold (5 mm). That is, when no foaming occurs, the foaming ratio is 1.0, and when the average thickness after foaming is 10.0, the foaming ratio is 2.0.
The constituent components of each foam molded article are as follows.

Example 5:
EVA (90 parts by mass), olefinic TPE (10 parts by mass), calcium carbonate (40 parts by mass), antifungal component {0.75 parts by mass of thiabendazole + 0.75 parts by mass of zinc pyrithione} (1.5 parts by mass) Agent (1.5 parts by mass), crosslinking aid (0.5 parts by mass), blowing agent {ADCA + zinc oxide} (7 parts by mass). Expansion ratio 1.87.
ADCA is azodicarbonamide (the same applies hereinafter) and is a pyrolytic foaming agent.

Example 6:
EVA (90 parts by mass), olefinic TPE (10 parts by mass), calcium carbonate (40 parts by mass), antifungal component {0.75 parts by mass of thiabendazole + 0.75 parts by mass of zinc pyrithione} (1.5 parts by mass) (1.5 parts by mass), a crosslinking assistant (0.5 parts by mass), and a blowing agent {ADCA + zinc oxide + DPT + urea} (6.4 parts by mass). Expansion ratio 1.75.
DPT is dinitrosopentamethylenetetramine (the same applies hereinafter) and is a pyrolytic foaming agent.

Example 7:
EVA (90 parts by mass), olefinic TPE (10 parts by mass), calcium carbonate (40 parts by mass), antifungal component {0.75 parts by mass of thiabendazole + 0.75 parts by mass of zinc pyrithione} (1.5 parts by mass) Agent (1.5 parts by mass), crosslinking aid (0.5 parts by mass), blowing agent {ADCA + DPT + urea} (6.4 parts by mass). Expansion ratio 1.68.

Example 8:
EVA (90 parts by mass), olefinic TPE (10 parts by mass), calcium carbonate (40 parts by mass), antifungal component {0.75 parts by mass of thiabendazole + 0.75 parts by mass of zinc pyrithione} (1.5 parts by mass) Agent (1.65 parts by mass), crosslinking aid (0.5 parts by mass), foaming agent {ADCA + OBSH} (4.4 parts by mass). Expansion ratio 1.61.
Note that OBSH is p, p-oxybisbenzenesulfonyl hydrazide, and is a pyrolytic foaming agent.

Example 9:
EVA (90 parts by mass), olefinic TPE (10 parts by mass), calcium carbonate (40 parts by mass), antifungal component {0.75 parts by mass of thiabendazole + 0.75 parts by mass of zinc pyrithione} (1.5 parts by mass) Agent (1.3 parts by mass), crosslinking aid (0.5 parts by mass), blowing agent {DPT + urea} (5.7 parts by mass). Expansion ratio 1.36.

Comparative Example 13:
EVA (90 parts by mass), olefinic TPE (10 parts by mass), calcium carbonate (40 parts by mass), cross-linking agent (1.3 parts by mass), cross-linking assistant (0.5 parts by mass), blowing agent DPT + urea ｝ (5.7 parts by mass). Expansion ratio 1.75.

(4-2) Test Results From the results of the above (4-1), the expansion ratios of Examples 6 to 9 and Comparative Example 13 were the same as those of Example 5 having the largest expansion ratio. As a result, it was found that the foaming of Example 9 was weaker than those of Examples 5 to 8 and Comparative Example 13, and that when trying to obtain a foam molded article having a large expansion ratio, foaming could be insufficient. From these results, it can be seen that when foaming an elastomer composition for bathroom articles containing a thermoplastic elastomer, thiabendazole and a metal salt of pyrithione, it is preferable to contain at least ADCA as a foaming agent.

  It should be noted that the present invention is not limited to those described in the above specific embodiments, but can be variously modified within the scope of the present invention in accordance with the purpose and application.

1; handrail for bathtub,
11; grip part, 11a; coating layer (soft part), 11b; core material (base material),
12; inner grip (base material); 12a; coating layer (soft part);
15; mounting part,
16; movable member, 16a; inner surface,
17; fixing member, 17a; inner surface,
19; handle,
2; shower bench,
21; backrest, 21a; backrest cushion, 21b; backrest frame,
22: armrest part, 22a: armrest grip (soft part), 22b: armrest frame (base material),
23; seat, 23a; seat cushion, 23b; seat frame,
24; leg, 24a; leg cover, 24b; leg frame,
3; bathtub,
31; pedestal part, 31a; top plate, 31b; pedestal frame,
32; leg, 32a; leg cover, 32b; leg frame,
50; bathtub,
51; upper end,
60; floor mat.

Claims (13)

  An elastomer composition for bathroom articles comprising a thermoplastic elastomer, thiabendazole and a metal salt of pyrithione.   2. The elastomer composition for bathroom articles according to claim 1, wherein the total amount of the thiabendazole and the pyrithione metal salt is 0.05 to 10 parts by mass when the total amount of the thermoplastic elastomer is 100 parts by mass.   The elastomer composition for bathroom articles according to claim 1 or 2, wherein the molar ratio of the thiabendazole and the metal salt of pyrithione is 1/9 to 9/1.   The elastomer composition for bathroom articles according to any one of claims 1 to 3, wherein the thermoplastic elastomer is at least one of a styrene-based copolymer and an ethylene-based copolymer. The styrene-based copolymer is a copolymer of a vinyl aromatic monomer and a diene-based monomer, and at least one selected from the group consisting of hydrogenated products thereof,
The ethylene-based copolymer is a copolymer of a vinyl monomer and an α-olefin monomer, a copolymer of a vinyl monomer and an α-substituted vinyl monomer, and at least one selected from the group consisting of hydrogenated products thereof. The elastomer composition for bathroom articles according to claim 4, which is:   The bathroom composition according to any one of claims 1 to 5, wherein the metal salt of pyrithione is at least one of zinc pyrithione and sodium pyrithione.   The elastomer composition for bathroom articles according to any one of claims 1 to 6, wherein the thiabendazole and the pyrithione metal salt are contained as granules having a volume-based median diameter of 1 to 100 µm.   The elastomer composition for bathroom articles according to any one of claims 1 to 7, further comprising an inorganic metal-based antibacterial agent.   The elastomer composition for bathroom articles according to any one of claims 1 to 8, wherein the composition does not contain a softening agent and has an A hardness of 20 to 90.   A bathroom article comprising the elastomer composition for a bathroom article according to any one of claims 1 to 9.   11. The bathroom article according to claim 10, which is foam molded. A bathroom article having a base material and a soft part integrally formed with the base material,
A bathroom article, wherein the soft part comprises the elastomer composition for a bathroom article according to any one of claims 1 to 9.   13. The bathroom article according to claim 12, wherein the soft part is foam-formed.

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