Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G18/00—Polymeric products of isocyanates or isothiocyanates
  • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
  • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
  • C08G18/40—High-molecular-weight compounds
  • C08G18/48—Polyethers
  • C08G18/4804—Two or more polyethers of different physical or chemical nature
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
  • C08L75/04—Polyurethanes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
  • C08L75/04—Polyurethanes
  • C08L75/08—Polyurethanes from polyethers
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2110/00—Foam properties
  • C08G2110/0008—Foam properties flexible
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
  • C08G2110/00—Foam properties
  • C08G2110/0083—Foam properties prepared using water as the sole blowing agent
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K3/00—Use of inorganic substances as compounding ingredients
  • C08K3/02—Elements
  • C08K3/08—Metals
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K9/00—Use of pretreated ingredients
  • C08K9/02—Ingredients treated with inorganic substances

Definitions

• the present invention relates to a foam having antibacterial properties.
• foams such as polyurethane foams have been widely used in kitchen sponges, cosmetic puffs, air-cone filters, bedding, nursing pads, therapeutic pads, shock absorbers, heat insulating materials, and the like.
• various attempts have been made to impart antibacterial properties to these foams due to the growing tendency toward health and hygiene.
• a method has been proposed in which a foam is formed according to an ordinary method, and then the foam is immersed in a solution containing antibacterial metal ions, washed with water and then dried (see Patent Document 1, for example).
• titanium oxide is dispersed and contained in a raw material liquid to be reacted in advance, and this is reacted (for example, patents). (Ref. 2).
• Patent Document 1 JP-A-6-346364
• Patent Document 2 JP-A-11-209495
• the present invention has been made in view of such circumstances, and provides an antibacterial foam that is uniformly imparted with excellent antibacterial properties due to silver and whose effects are favorably sustained over a long period of time. Objective.
• the present invention provides an antibacterial property in which a fine powder composed of fibers coated on at least one of silver and acid silver is dispersed in a foam.
• the first aspect is foam.
• the present invention has, in particular, the antibacterial foam in which the fine powder is dispersed and contained in an amount of 0.05 to 20% by weight based on the weight of the foam, in particular, and
• the third gist is an antibacterial foam in which the fine powder fiber is a polyester fiber, and a fourth gist is an antibacterial foam in which the foam is a resin foam or rubber latex foam.
• the antibacterial foam of the present invention when exposed to moisture, silver on the surface of the fine powder dispersed and contained in the foam reacts with water to react with active oxygen (such as superoxide-on radical). Therefore, an excellent antibacterial action can be exhibited over a long period of time by the action of the active oxygen.
• active oxygen such as superoxide-on radical
• the active oxygen oxidizes odorous substances, it has an excellent deodorizing effect. Therefore, when this material is used for a member applied to the skin, such as a cosmetic puff, a wound covering sheet, an insole for shoes, a pad for clothing, a nursing tool, a bedding, an interior product, etc., the skin is released.
• the antibacterial performance and deodorant performance of the antibacterial foam can be demonstrated by moisture, and a hygienic and comfortable use feeling can be obtained. Even if it is not applied to the skin, it can be used as an interior material or exterior material of a building for the purpose of preventing the generation of germs and fungi due to moisture.
• FIG. 1 is a schematic cross-sectional view of one embodiment of the present invention.
• FIG. 2 is an explanatory diagram of silver-coated fibers used in the above examples. Explanation of symbols
• FIG. 1 is a schematic cross-sectional view of an antibacterial foam according to an embodiment of the present invention.
• This antibacterial foam has a structure in which a fine powder 2 composed of fibers whose surfaces are coated with silver is dispersed in a foam 1 serving as a base.
• the foam 1 serving as the base is appropriately selected depending on the application, and is not particularly limited.
• polyurethane foam, cellulose foam, silicone foam, and other foams natural rubber, styrene-butadiene rubber, acrylic-tolyl-butadiene rubber, chloroprene rubber, ethylene propylene rubber, ethylene propylene rubber, Examples thereof include rubber latex foam made of olefin rubber such as chlorinated polyethylene, silicone rubber, fluorine rubber, and the like. Use these alone or in combination of two or more.
• the surface of the fiber 3 is a fiber coated with silver or silver oxide 4 (hereinafter referred to as "silver-coated fiber”). “T ⁇ ⁇ ) is used.
• silver-coated fiber any fiber may be used as long as the fiber surface is coated with silver or acid silver 4 by a technique such as plating, impregnation or coating.
• a synthetic fiber surface that is silver-plated by electroless plating is preferred.
• polyester acrylic, nylon, and the like
• polyester because of excellent thermal stability of silver-plated products.
• the synthetic fiber may be a short fiber or a long fiber, and among them, a long fiber wound up in a cheese shape or a cone shape may be directly electrolessly plated. It is preferable. This method requires a high level of technology, but is excellent because it can be silver-plated into fine fibers.
• the thickness of the synthetic fiber is preferably 0.1 to 10 dtex, and more preferably 1.5 to 5 dtex, in order to uniformly disperse the foam 1.
• the fine powder 2 of the present invention can be obtained by finely cutting the silver-coated fiber. At this time, it is preferable to set the length force of the fine powder 2 to 0.1 to Lmm, especially about 0.5 mm, in order to disperse the powder uniformly in the foam 1.
• the antibacterial foam of the present invention when producing the foam 1 using the foam material, blends the fine powder 2 composed of the above-mentioned silver-coated fibers in an appropriate ratio, and uniformly disperses it. It can be obtained by foaming and solidifying in a state of being allowed to stand.
• the mixing ratio of the fine powder 2 is appropriately set according to the use of the antibacterial foam, the required antibacterial and deodorizing levels, the flexibility of the foam 1, and the like. However, in general, it is preferable to set it to 0.001% by weight or more, particularly 0.05 to 20% by weight, based on the entire molded foam 1 (including fine powder 2). That is, if the amount is less than 0.05% by weight, the antibacterial effect may be insufficient. Conversely, if the amount exceeds 20% by weight, the foam 1 may aggregate and be uniformly dispersed. Power is also.
• the foaming ratio of the foam 1 is also set as appropriate depending on the use of the antibacterial foam, etc., as in the case of the above-mentioned blending ratio, and the force to make open cells or closed cells is also used and required. It is set appropriately according to the flexibility.
• the antibacterial foam of the present invention obtained as described above contains the fine powder 2 made of silver-coated fibers dispersed in the foam 1, so that when exposed to moisture, the surface of the fine powder 2
• the silver and water react with each other to generate active oxygen (superoxide-on radical, etc.), and the above-mentioned active oxygen can exert an excellent antibacterial action over a long period of time.
• active oxygen oxidizes odorous substances, it has an excellent deodorizing effect. Therefore, it is released from the skin when used as a member applied to the skin, such as a cosmetic puff, a wound covering sheet, an insole for shoes, a pad for clothing, a nursing tool, a bedding, and an interior product.
• Antibacterial performance and deodorizing performance of the antibacterial foam can be demonstrated by the moisture that is produced, and a hygienic and comfortable use feeling can be obtained. Even if it is not applied to the skin, it can be used as a building interior material or exterior material for the purpose of preventing the generation of bacteria and fungi due to moisture. Silver ions also have an electromagnetic shielding effect, so As described above, when an interior material of a building is used as an exterior material, an electromagnetic wave shielding effect can be obtained as well as an antibacterial and antifungal effect.
• cosmetic puffs are used repeatedly to apply cosmetics such as foundations, and there is a problem that even if lightly washed each time, germs gradually grow and a slimy sensation occurs.
• the antibacterial foam of the present invention is applied to a cosmetic puff, such a feeling of slimming does not occur and it can be used satisfactorily over a long period of time.
• the antibacterial foam of the present invention when used as, for example, an inner pad or a paddle put in a brassiere cup, silver ions are generated by moisture of sweat, and an excellent deodorizing effect is exhibited.
• the antibacterial foam (sheet-like) of the present invention is soaked in water and affixed to the face, an antibacterial / antibacterial pack is obtained and an anti-acne effect is exhibited.
• the antibacterial foam of the present invention can be provided for various uses by processing into an appropriate form required for the use.
• the antibacterial foam of the present invention which does not need to be entirely composed of the antibacterial foam of the present invention can be used in appropriate combination.
• a polyester fiber (single yarn fineness 2 dtex, trade name: Sylphia Ibar, manufactured by Mitsubishi Materials Corporation) in which 20% by weight of silver is covered with electroless plating is prepared.
• the antifungal agent applied to the silver surface was removed by washing and drying with a surfactant.
• the silver-coated fiber was cut to a fiber length of 0.5 mm to produce a fine powder, and dried in a dryer set at 70 to 80 ° C. for 4 to 5 hours. Note that the silver on the surface of the fine powder was oxidized by air because the antifungal agent was removed. Part of it becomes acid silver.
• polyisocyanate NCO content 48.2%, trade name: Cosmonate 80, Mitsui Takeda Urethane (Made by Kogyo Co., Ltd.) Hold 20 g, stir at 3000 rpm for 6 seconds, inject into a molding container with an inner bottom shape of 250 mm X 100 mm, depth of 80 mm, and internal volume of 2000 cm 3 and leave for a predetermined time
• the foamed and solidified foam was taken out and cut into small pieces of 60 mm ⁇ 60 mm ⁇ 10 mm to obtain a sample of a cosmetic puff.
• This product contains 2.0% by weight of fine powder.
• the mixing ratio of the fine powder of silver-coated fibers was changed as shown in Tables 1 and 2 below. Other than that, four types of cosmetic puff samples were obtained in the same manner as in Example 1 above.
• the silver-coated fiber fine powder is the same as the silver-coated fiber fine powder, and the silver-coated fiber fine powder is mixed with the photocatalytic titanium oxide powder (particle size 0.03 mm) instead of the silver-coated fiber fine powder. Instead, a silver-loaded zeolite (particle size 0.1 mm) was prepared in the same manner as in Example 1 to obtain cosmetic puff samples (Comparative Examples 1 to 3).
• a commercially available foundation was applied to the front and back surfaces of the sample, washed with water, lightly squeezed, placed on a plastic tray, and allowed to stand at room temperature (20-28 ° C). Then, once every three days, tap water was sprayed with a spray to give moisture, and it was confirmed whether or not the sample had a slimy feeling on the front and back surfaces. The case was evaluated as “X” when it was completely slimy, “ ⁇ ” when it was slightly slimy, and “ ⁇ ” when it was not slimy at all.
• Example 6 the anti-mold agent is not removed and the silver is not oxidized
• Example 1 product the anti-mold agent is removed and the silver is partially converted to silver oxide
• the Comparative Example 2 product can be expected to have antibacterial properties due to the photocatalytic effect, but cannot exhibit the antibacterial effect because it is an indoor antibacterial test without ultraviolet irradiation. Therefore, it can be seen that indoor germs and fluorescent lights cannot suppress the propagation of germs.
• the particle size of the used titanium oxide titanium is small, it exists in an aggregated state in the foamed body, so that the tactile sensation is getting worse.
• the antibacterial foam of the present invention is used as a member applied to the skin, such as a cosmetic puff, a wound covering sheet, an insole for shoes, a pad for clothing, a care tool, a bedding, an interior product, etc.
• the antibacterial foam's antibacterial performance and deodorant performance are exhibited by moisture released from the water, and a hygienic and comfortable feeling of use can be obtained. Even if it is not applied to the skin, it can be used as an interior material or exterior material of a building for the purpose of preventing the generation of germs and fungi due to moisture. Since silver ions also have an electromagnetic wave shielding effect, as described above, when used as an interior material of a building or an exterior material, it is possible to obtain an electromagnetic wave shielding effect as well as an antibacterial and antifungal effect.

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• Chemical & Material Sciences (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Organic Chemistry (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Compositions Of Macromolecular Compounds (AREA)

Applications Claiming Priority (2)

Publications (1)

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Cited By (2)

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Citations (4)

Family Cites Families (3)

• 2004
  • 2004-06-24 JP JP2004186394A patent/JP2006008802A/ja active Pending
• 2005
  • 2005-06-10 WO PCT/JP2005/010677 patent/WO2006001182A1/ja active Application Filing
  • 2005-12-23 TW TW094146210A patent/TW200724585A/zh unknown

Patent Citations (4)

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