JP2009138072A - Elastomer composition and shock absorber for footwear and related goods - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elastomer composition that has moderate resilience necessary for absorbing a physical impact and moldability in combination with high antibacterial properties and to provide a shock absorber for footwear and related goods that is produced by molding the elastomer composition. <P>SOLUTION: The elastomer composition contains Ag as an antibacterial agent in an amount of 0.1-10 pts.mass based on an elastomer. It is preferable that the elastomer composition includes an olefin elastomer as the elastomer. The shock absorber for footwear and related goods is produced by molding the elastomer composition. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an elastomer composition having antibacterial properties, and an impact absorber for undercarriage obtained by molding the elastomer composition.

  To date, many products have been developed and researched to avoid problems that occur while wearing shoes. Such troubles include problems of deterioration of hygiene due to the propagation of germs in shoes, and troubles caused by physical impacts such as legumes, octopus, warts, and shoe slips caused by pressure or friction on the legs when wearing shoes. Is mentioned.

  First of all, the sanitary condition lowering trouble is derived from the fact that shoes, particularly leather shoes, are in a moist state and become an environment in which bacteria and fungi easily grow and propagate. In shoes, it is not a favorable environment from the viewpoint of hygiene. In particular, if Escherichia coli, Staphylococcus aureus and the like are propagated, it causes a bad odor of leather shoes, and if ringworm is propagated, it causes dermatitis. Next, troubles caused by physical impacts are caused by wearing shoes, mules, sandals, etc. in addition to the above shoes.

  In order to avoid the above-mentioned troubles, an insole having antibacterial properties, an insole capable of absorbing physical impact, and the like have been developed. For example, Patent Document 1 (Japanese Patent Laid-Open No. 2005-298536) describes an elastomer composition containing an elastomer and a natural antibacterial compound and / or a natural material containing an antibacterial compound.

  However, a composition that has high antibacterial properties and can absorb physical impact well, an insole using the composition, and the like are not disclosed, and development is urgently desired.

Insole containing antibacterial and fungicides is required to have high safety in applications where it comes into contact with the human body.
JP 2005-298536 A

  In view of the situation as described above, an object of the present invention is to provide an elastomer composition and an elastomer composition that have appropriate elasticity for absorbing physical impact, moldability, and high antibacterial properties. An object of the present invention is to provide a shock absorber for a suspension formed by molding.

  The present invention relates to an elastomer composition containing 0.1 to 10 parts by mass of Ag as an antibacterial agent with respect to 100 parts by mass of the elastomer.

  In the elastomer composition of the present invention, the elastomer preferably contains an olefin-based elastomer.

In the elastomer composition of the present invention, the antibacterial agent is selected from a compound selected from SiO ₂ , B ₂ O ₃ , Na ₂ O and zeolite, and from Zn, Cu, Sn, Ba, Mg, Ni and Co. It is preferable that at least one of the metals to be further included.

  The elastomer composition of the present invention preferably further contains 10 to 70 parts by mass of paraffinic oil with respect to 100 parts by mass of the elastomer.

  In the elastomer composition of the present invention, the durometer A hardness is preferably in the range of 2 to 25.

  In the elastomer composition of the present invention, it is preferable that at least a part of the antibacterial agent is encapsulated in microcapsules.

  Moreover, it is preferable that the elastomer composition of the present invention further includes a microcapsule containing an essential oil and / or a deodorant compound.

  The present invention also relates to a shock absorber for a suspension formed by molding the above-described elastomer composition.

  Here, in the present invention, the antibacterial agent has an effect of suppressing the growth of microorganisms (including bacteria and fungi).

  The present invention relates to an elastomer composition having moderate elasticity for absorbing physical impact and moldability, and having high antibacterial properties, and an impact absorber for an underarm formed by molding the elastomer composition. Can be provided.

<Elastomer composition>
The elastomer composition of the present invention comprises 0.1 to 10 parts by mass of Ag as an antibacterial agent, and more preferably 0.1 to 4 parts by mass of Ag with respect to 100 parts by mass of the elastomer. . In the elastomer composition, the antibacterial agent is preferably uniformly dispersed in the elastomer.

  The antibacterial agent preferably used in the present invention has extremely low toxicity as a result of a toxicity test on humans, and there is no problem in using it in a wet state for a long time. The elastomer composition of the present invention is an environment in which it is easy to make a charged state as will be described later with Ag as an antibacterial agent contained therein. Therefore, it can be considered that most of the contained Ag is in a charged state and substantially contributes to the antibacterial action. However, if too much Ag is present in the elastomer composition, the cost may increase and the texture of the elastomer composition may change. Therefore, the content of the antibacterial agent is 10 parts by mass with respect to 100 parts by mass of the elastomer. It is preferable that it is below mass parts. In addition, antibacterial performance cannot be shown unless it is 0.1 mass part or more from an experimental result.

  As the elastomer in the elastomer composition, an olefin-based one can be used. The olefin type is preferably a polyethylene copolymer as described later. Since the elastomer itself is a chemical composition and is an artificial object, depending on the material, there is a risk of causing inflammation from components derived from the chemical composition when it is brought into contact with the skin of the foot. However, the polyethylene copolymer preferably used in the present invention ensures safety, and the skin is inflamed even when it is in contact with the skin of the foot in a wet state in a shoe for a long time. Hateful.

As an antibacterial agent, at least one of a compound selected from SiO ₂ , B ₂ O ₃ , Na ₂ O and zeolite, and a metal selected from Zn, Cu, Sn, Ba, Mg, Ni and Co By containing, Ag is stably held in the elastomer in a charged state, and the antibacterial effect can be further increased. First, moderate pores are formed in the elastomer by including the compound. Here, the fungus includes mold, and the mold includes ringworm fungus that causes athlete's foot and the like, and the size thereof is 2 to 30 μm. In addition, this is large when considered from the gaps between the carbon chains constituting the elastomer, but as described above, in addition to Ag, the above-mentioned compound is contained as an antibacterial agent, so that a gap into which the fungus enters is formed. , The contact with Ag is facilitated, and as a result, the antibacterial property (contact area with bacteria) of the elastomer composition is increased. Moreover, this elastomer composition can provide an antibacterial action with Ag by including this metal.

  Ag is known to suppress its action by cleaving the cysteine bond in the cell wall of the fungus or entering the cell. In the present invention, since the pores are formed by including both Ag and the compound in the elastomer, the opportunity for the bacteria to come into contact with Ag in the elastomer is increased. The composition can provide a high antibacterial effect even when compared with conventional insoles and the like.

  Moreover, in this invention, it is preferable that 10-70 mass parts paraffinic oil is further included with respect to 100 mass parts of this elastomer, and it is especially preferable that 20-50 mass parts is included. By containing the paraffinic oil, it is possible to provide an elastomer composition that not only has low hardness but also has a good touch and adsorbs to the skin of the foot. Then, by combining Ag with the conditions provided for obtaining the texture, an elastomer composition having a high antibacterial property, which has not been available in the past, can be provided. Examples of the paraffinic oil include Daphne Oil CP (manufactured by Idemitsu Kosan Co., Ltd.), High Coal (manufactured by Kaneda Co., Ltd.), and the like.

  And the elastomer composition in this invention is the range whose durometer A hardness is 2-25. The hardness can be measured according to JIS K 6253. The elastomer composition of the present invention requires an appropriate softness, and the softness provides a feeling of sticking to the skin. It can be applied to shoes or directly to the skin (the sole of the foot). Can provide a composition that enables both. It is an elastomer having such hardness and has both high antibacterial properties and shock absorption properties, and can help to create a comfortable environment around the undercarriage.

  In addition, the elasticity derived from the low hardness of the elastomer also has the effect of suppressing the formation of mametaco, but in addition to that, the elastomer composition is affixed to the place where the mametaco has been formed. By this, it can suppress that a pressure is applied to this Mametaco. In addition, by forming an insole with the elastomer composition, it is possible to absorb the impact on the sole while maintaining the antibacterial properties of the entire shoe, thus reducing the pressure on the knees and the like from walking for a long time. be able to.

  And it is preferable that at least one part of this antibacterial agent is included in the microcapsule. This is because microcapsules have sustained release properties. As the antibacterial agent, in addition to the above-described Ag and the like, an organic antibacterial agent, a commercially available bactericidal agent, preservative and the like may be further encapsulated in a microcapsule and contained in the elastomer. Examples of organic antibacterial agents include tropolones such as hinokitiol; chitosans; paraoxybenzoates; organic acids such as benzoic acid and dehydroacetic acid; salts of these organic acids; quaternary such as benzalkonium chloride Examples thereof include ammonium salts; quaternary phosphonium salts; iodophors and the like. By containing such microcapsules, for example, the role of an antibacterial agent that is effective in inhibiting the growth of fungi can be gradually exhibited. It is preferable that content of this microcapsule is 0.1-10 mass parts with respect to 100 mass parts of elastomer in an elastomer composition. This is because when the content of the microcapsule is more than 10 parts by mass, the hardness of the elastomer composition is affected and may become hard. Moreover, it is preferable that the average particle diameter of this microcapsule is 1-10 micrometers. This is because the dispersibility is high. In addition, it is preferable that 30 to 40 parts by mass of the antibacterial agent is included in the microcapsule with respect to 100 parts by mass of the microcapsule. In addition, a well-known thing can be used suitably for a microcapsule.

  And it is preferable that the elastomer composition in this invention further contains the microcapsule which included essential oil and / or a deodorizing compound. Of course, essential oils include only natural oils, but other than these, chemical synthetic products may be mixed. This is because the elastomer composition according to the present invention can provide, for example, a relaxing scent in addition to antibacterial properties. The fragrance of the elastomer composition of the present invention not only increases the antibacterial property, but can also provide an effect that it can remove malodors that have soaked into shoes. Also at this time, it is preferable to contain 0.1-10 mass parts of this microcapsule with respect to 100 mass parts of elastomers in an elastomer composition. Moreover, it is preferable that the average particle diameter of this microcapsule is 1-10 micrometers. Moreover, it is preferable that 30 to 40 parts by mass of the essential oil and / or deodorant compound is included in the microcapsule with respect to 100 parts by mass of the microcapsule.

  The deodorant compound refers to a chemically synthesized chemical product. A commercially available fragrance | flavor etc. may be sufficient for this, In the elastomer composition of this invention, the additional effect different from an antibacterial can be provided.

  The elastomer composition of the present invention contains microcapsules, and the microcapsules can enclose an essential oil such as aroma oil. The microcapsules can improve the humidity in the elastomer.

  The essential oil-encapsulated microcapsules are contained in order to continuously enjoy the fragrance of the original aroma oil, but the microcapsules also have the role of maintaining the moisture retention of the elastomer. Is doing. Therefore, the microcapsule not only releases the scent of aroma oil that distracts the bad smell in shoes, but also helps to suppress the growth of fungi such as fungi and bacteria when Ag as an antibacterial agent is charged. Also has a role as an agent.

  Further, the elastomer composition of the present invention can be used after being washed with water a plurality of times. This is because even if washed, the antibacterial action basically does not fade. This is an elastomer composition having an appropriate softness, in which an inorganic antibacterial agent is mainly contained, and the inorganic antibacterial agent is an organic antibacterial agent Compared with the cleaning, the effect is not diminished. Since the charging property of Ag is also secured by this, the fungi on the surface can be washed away, so that the amount of resident bacteria can be greatly reduced. This makes it possible to provide an elastomer composition having both low hardness and high antibacterial properties, which has not existed before.

  The elastomer composition of the present invention can be produced by kneading and molding an elastomer and an appropriate antibacterial agent, microcapsule and the like by a known method.

≪Antimicrobial agent≫
Examples of the antibacterial agent in the elastomer composition of the present invention include Ag as described above. More preferably, the antibacterial agent is selected from a compound selected from SiO ₂ , B ₂ O ₃ , Na ₂ O and zeolite, and Zn, Cu, Sn, Ba, Mg, Ni and Co together with the Ag. It is preferable that at least one of the metals is included. For example, the antibacterial agent in the present invention has at least one selected from a group in which Ag is supported in silica-alumina-based particles, or Ag and Zn, Cu, Sn, Ba, Mg, Ni, and Co. The combination with other metal components is mentioned. In the case where Ag is combined with at least one other metal component selected from the group consisting of Zn, Cu, Sn, Ba, Mg, Ni, and Co, Ag and other metal components Is preferably used in an atomic ratio of 100: 1 to 1: 700, particularly 20: 1 to 1: 200.

In the zeolite of the present invention, the moisture adsorption amount at a relative humidity of 75% is suppressed to 5% or less, particularly 2% or less, and the BET specific surface area is also suppressed to 30 m ² / g or less, particularly 10 m ² / g or less. It is preferable. This is to prevent the supported Ag from blocking the pores of silica alumina.

  The antibacterial agent in the present invention is preferably used in a state where Ag is supported on zeolite. At this time, the particle size of the antibacterial agent is preferably 0.5 to 150 μm. When the particle size is smaller than 0.5 μm, the tendency of aggregation of the particles is increased, which is not preferable. When the particle size is larger than 150 μm, the antibacterial action tends to be reduced, and further, dispersibility in an elastomer. There is also a tendency to decrease.

  In addition, the antibacterial agent is a per se known modifier, for example, a dispersant or dispersion aid, a surfactant, a coupling agent, a fluidity improver, an anti-discoloration agent, an anti-colorant, as long as the effect performance is not impaired. The surface treatment may be performed with an oxidizing agent, a masking agent, an ultraviolet absorber, a colorant, a deodorant, a fungicide, a fragrance, other additives, and the like. Further, the dispersant or auxiliary agent is not particularly limited, and for example, waxes and low melting point resins are used.

  In the present invention, the antibacterial agent is used for blending into a resin or the like in the form of powder, but if necessary, by itself or by adding an inorganic or organic binder, it is granular, tablet-like, spherical, rectangular parallelepiped It may be formed into a shape, a columnar shape, a honeycomb shape, a lump shape, or the like. For this molding, known molding methods such as an extrusion method, a tableting method, a rolling method, a spraying method, and a pressure molding method can be used.

  Specific examples include BIOSURE SGI (manufactured by Antimicrobial Technology Co., Ltd.), Bactekiller (manufactured by Fuji Chemical Co., Ltd.), Zeomic (manufactured by Sinanen Zeomic Co., Ltd.), and the like.

≪Elastomer material≫
The elastomer in the present embodiment is preferably an olefin elastomer. Here, the olefin elastomer in the present embodiment is a polymer that is interpreted in the broadest sense and includes olefin as a polymerization unit. For example, olefinic thermoplastic resins, ionomer resins, olefinic thermoplastic elastomers, or modified products thereof.

  Here, polyethylene, polypropylene, polystyrene, ABS resin, acrylic resin, methacrylic resin, or the like can be used as the olefinic thermoplastic resin.

  The ionomer resin is, for example, a copolymer of an α-olefin and an α, β-unsaturated carboxylic acid having 3 to 8 carbon atoms, and is obtained by neutralizing at least a part of the carboxyl group with a metal ion. There are binary copolymers. And a terpolymer of an α-olefin, an α, β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α, β-unsaturated carboxylic acid ester having 2 to 22 carbon atoms, wherein at least one of the carboxyl groups. And those obtained by neutralizing the part with metal ions.

  And as those composition ratios, when the base polymer of ionomer resin is a binary copolymer of an α-olefin and an α, β-unsaturated carboxylic acid having 3 to 8 carbon atoms, the α-olefin is 80 to 90 mass. %, And the α, β-unsaturated carboxylic acid is preferably 10 to 20% by mass. When the base polymer is a terpolymer of an α-olefin, an α, β-unsaturated carboxylic acid having 3 to 8 carbon atoms and an α, β-unsaturated carboxylic acid ester having 2 to 22 carbon atoms, the α-olefin Is 70 to 85% by mass, α, β-unsaturated carboxylic acid is preferably 5 to 30% by mass, and α, β-unsaturated carboxylic acid ester is preferably 25% by mass or less. In addition, these ionomer resins preferably have a melt index (MI) of 0.1 to 20, particularly 0.5 to 15. By setting the carboxylic acid content or the carboxylic acid ester content in the above range, the resilience can be enhanced.

  As said alpha olefin, ethylene, propylene, 1-butene, 1-pentene etc. are used, for example, and ethylene is especially preferable. As the α, β-unsaturated carboxylic acid having 3 to 8 carbon atoms, for example, acrylic acid, methacrylic acid, fumaric acid, maleic acid, crotonic acid and the like are used, and acrylic acid and methacrylic acid are particularly preferable. As the unsaturated carboxylic acid ester, methyl, ethyl, propyl, n-butyl, isobutyl ester and the like such as acrylic acid, methacrylic acid, fumaric acid and maleic acid are used, and acrylic acid ester and methacrylic acid ester are particularly preferable. .

  Copolymers of the above α-olefin and α, β-unsaturated carboxylic acid or terpolymers of α-olefin, α, β-unsaturated carboxylic acid and α, β-unsaturated carboxylic acid ester Examples of metal ions that neutralize at least a part of the carboxyl group include sodium ions, lithium ions, zinc ions, magnesium ions, and potassium ions.

  And when ionomer resin is what neutralized at least one part of the carboxyl group in the copolymer of ethylene and acrylic acid or methacrylic acid with the metal ion, its melt index is 3-7, bending rigidity It is preferable to be a so-called high rigidity and high flow type having a rate of 200 to 400 MPa.

  Specific examples of the above ionomer resins are illustrated by trade names. As examples of binary copolymer ionomer resins commercially available from Mitsui DuPont Chemical Co., Ltd., Himilan 1555 (Na), Himilan 1557 (Zn), Himilan 1605 (Na) , High Milan 1706 (Zn), High Milan 1707 (Na), High Milan AM 7318 (Na), High Milan AM 7315 (Zn), High Milan AM 7317 (Zn), High Milan AM 7311 (Mg), High Milan MK 7320 (K), and Triple Weight Examples of combined ionomer resins include Himilan 1856 (Na), Himilan 1855 (Zn), Himilan AM7316 (Zn), and the like.

  Further, as ionomer resins commercially available from DuPont, Surlyn 8945 (Na), Surlyn 8940 (Na), Surlyn 9910 (Zn), Surlyn 9945 (Zn), Surlyn 7930 (Li), Surlyn 7940 (Li), Three Examples of the original copolymer-based ionomer resin include Surlyn AD8265 (Na) and Surlyn AD8269 (Na).

  Examples of ionomer resins commercially available from Exxon include Iotech 7010 (Zn) and Iotech 8000 (Na). In addition, Na, Zn, K, Li, Mg, etc. described in parentheses after the above trade names indicate these neutralized metal ion species. In the present invention, the ionomer resin used for the cover composition may be a mixture of two or more of those exemplified above, or an ionomer resin neutralized with the monovalent metal ion exemplified above and a divalent resin. A mixture of two or more ionomer resins neutralized with metal ions may be used.

  The olefin-based thermoplastic elastomer is a concept including an olefin unit in a molecular chain and a so-called styrene-based thermoplastic elastomer, and includes a block copolymer having a soft segment and a hard segment in the molecule. A unit such as a butadiene block or an isoprene block obtained from a conjugated diene compound as a soft segment. Here, as the conjugated diene compound, for example, one or more kinds can be selected from butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, etc., among which butadiene, isoprene and these. The combination of is preferable. As a component constituting the hard segment, it is obtained from a compound selected from ethylene, propylene, styrene and derivatives thereof such as α-methylstyrene, vinyltoluene, p-tert-butylstyrene, etc. Polyethylene block, polypropylene block or styrene block.

  Examples of the styrene thermoplastic elastomer include styrene-isoprene-butadiene-styrene block copolymer (SIBS structure), styrene-butadiene-styrene block copolymer (SBS structure), and hydrogenated double bond portion of the butadiene. Styrene-ethylene-butylene-styrene block copolymer (SEBS structure), styrene-isoprene-styrene block copolymer (SIS structure), styrene-ethylene-propylene-styrene block copolymer with hydrogenated isoprene double bond moiety Examples thereof include a coalescence (SEPS structure), a styrene-ethylene-ethylene-propylene-styrene copolymer (SEEPS structure), and a modified product thereof. For example, as the SEBS structure, there is a product such as Lavalon SR04 manufactured by Mitsubishi Chemical Corporation.

  The content of styrene (or a derivative thereof) in the SIBS structure, SBS structure, SEBS structure, SIS structure, SEPS structure, and SEEPS structure is preferably in the range of 10 to 50% by mass, particularly 15 to 45% by mass in the copolymer.

<Shock absorber for undercarriage>
The shock absorber for undercarriage in the present invention is formed by appropriately molding the above-described elastomer composition according to the intended use. For example, an insole formed with the elastomer composition, an impact absorber for heels, an impact relieving material directly applied to the skin where mametaco is generated, and the like can be appropriately formed.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited to these.

<Examples 1 to 4, Comparative Example 1, Comparative Example 2>
(1) Preparation of test piece As shown in Table 1 and Table 2, 50 parts by mass of paraffinic oil and Ag antibacterial agent are mixed with 100 parts by mass of PE (polyethylene) copolymer as an olefin elastomer. Then, a test piece having a length of 4 cm, a width of 4 cm, and a thickness of 5 mm was obtained by kneading and molding.

Here, specifically,
Olefin-based elastomer: Polyethylene copolymer (manufactured by Cosmo Keiki Co., Ltd.)
Paraffin oil: Daphne oil CP (made by Idemitsu Kosan Co., Ltd.)
Ag antibacterial agent: Zeomic (manufactured by Sinanen Zeomic Co., Ltd.)
Was used.

(2) Hardness measurement The durometer A hardness in Tables 1 and 2 was a value measured with a durometer ASKER LA-1 DD3-A in accordance with JIS K 6253.

(3) Antibacterial performance measurement The contents shown in Table 1 were measured for the test pieces of Example 1, Example 2 and Comparative Example 1 according to JIS Z 2801 (film adhesion method). In the table, the number of cells immediately after inoculation with Escherichia coli and Staphylococcus aureus and the number of cells after incubation at 35 ° C. for 24 hours are described. Moreover, the content shown in Table 2 is obtained by measuring the test pieces of Example 3 and Comparative Example 2 three times in accordance with JIS Z 2801 (film adhesion method) and averaging the results. In the table, the number of cells immediately after inoculation with Escherichia coli and Staphylococcus aureus and the number of cells after incubation at 35 ° C. for 24 hours are described.

(4) Examination of results As shown in Table 1, in Examples 1 and 2, it was found that high antibacterial performance was exhibited while maintaining hardness capable of absorbing impact properties. In Comparative Example 1, since no Ag antibacterial agent was contained, antibacterial performance was not exhibited. In Comparative Example 2, a small amount of Ag antibacterial agent was contained, and although the number of cells was reduced with respect to E. coli, antibacterial performance was not confirmed with respect to S. aureus.

  That is, in Examples 1 to 3, it was confirmed that the number of bacterial cells after incubation for 24 hours was reduced compared to the number of bacterial cells immediately after inoculation in both E. coli and S. aureus. Thereby, it was proved that the elastomer composition according to the present invention has a function of suppressing the growth of bacterial cells that cause malodor and the like.

<Example 4 to Example 6, Comparative Example 3, Comparative Example 4>
As shown in the composition of Table 3, test pieces were obtained in the same manner as in Examples 1 to 3, except that 1 part by mass of microcapsule 1 (antifungal agent encapsulation) was contained. Further, the hardness was measured in the same manner as described above. The antibacterial performance ◯ in the table is the same as in Examples 1 to 3 described above, and indicates that the number of Escherichia coli and Staphylococcus aureus cells decreased 24 hours after inoculation. The anti-fungal performance in the table indicates that the number of ringworms decreased immediately after inoculation.

Here, specifically, the microcapsule 1 (encapsulated with antifungal agent) contained 40 parts by mass of hinokitiol (manufactured by Sanoflor) with respect to 100 parts by mass of the microcapsule (manufactured by Suzuki Oil & Fats Co., Ltd.). A thing was used.

  As shown in Table 3, in Examples 4 to 7, high antibacterial performance was shown as in Examples 1 to 3. Moreover, high antifungal performance was also shown by including the above-mentioned microcapsule 1 (antifungal agent inclusion). Here, when Comparative Example 4 and Examples 4 to 6 were compared, Comparative Example 4 did not show antifungal performance despite including microcapsule 1 (antifungal agent encapsulation). This is because the elastomer composition of the present invention contains both an appropriate Ag-based antibacterial agent and the microcapsule 1 (antifungal agent encapsulation), thereby producing a synergistic effect and exhibiting high antibacterial performance and antifungal performance. I understood it.

<Example 7 to Example 9, Comparative Example 5, Comparative Example 6>
As shown in the composition of Table 4, test pieces were obtained in the same manner as in Examples 1 to 3, except that 1 part by mass of microcapsule 2 (essential oil inclusion) was contained. Further, the hardness was measured in the same manner as described above. The moisturizing performance in the table is an appearance evaluation after the test piece is attached to the skin.

Here, specifically, the microcapsule 2 (essential oil inclusion) contains 40 parts by mass of geranium tea tree (manufactured by Sanofl) with respect to 100 parts by mass of the microcapsule (manufactured by Suzuki Oil & Fat Co., Ltd.). Was used.

  As shown in Table 4, in Examples 7 to 9, high antibacterial performance was shown as in Examples 1 to 3. Moreover, high moisturizing performance was also shown by including the above-mentioned microcapsule 2 (essential oil inclusion).

<Example 10 to Example 12, Comparative Example 7, Comparative Example 8>
As shown in the composition of Table 5, a test piece was prepared in the same manner as in Examples 1 to 3, except that 1 part by mass of microcapsule 1 (antifungal encapsulation) and microcapsule 2 (essential oil encapsulation) was contained. Got. Further, the hardness was measured in the same manner as described above. The ○ in the antifungal performance and moisturizing performance in the table is the result of examination by the method described above.

  As shown in Table 5, in Examples 10 to 12, high antibacterial performance, moisturizing performance and antifungal performance were shown.

  It should be understood that the embodiments and examples disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  According to the present invention, an elastomer composition and an elastomer composition having moderate elasticity for absorbing physical impact and moldability, and having high antibacterial properties and less adverse effects on the human body are molded. An underbody shock absorber can be provided.

Claims (8)

  An elastomer composition containing 0.1 to 10 parts by mass of Ag as an antibacterial agent with respect to 100 parts by mass of the elastomer.   The elastomer composition according to claim 1, wherein the elastomer comprises an olefin-based elastomer. The antibacterial agent includes
The compound according to claim 1, further comprising at least one of a compound selected from SiO ₂ , B ₂ O ₃ , Na ₂ O and zeolite, and a metal selected from Zn, Cu, Sn, Ba, Mg, Ni and Co. The elastomer composition according to 2.   The elastomer composition according to any one of claims 1 to 3, further comprising 10 to 70 parts by mass of paraffinic oil with respect to 100 parts by mass of the elastomer.   The elastomer composition according to any one of claims 1 to 4, wherein the durometer A hardness is in the range of 2 to 25.   The elastomer composition according to claim 1, wherein at least a part of the antibacterial agent is encapsulated in a microcapsule.   The elastomer composition according to any one of claims 1 to 6, further comprising a microcapsule containing an essential oil and / or a deodorant compound.   A shock absorber for undercarriage formed by molding the elastomer composition according to any one of claims 1 to 7.