WO2006038761A1 - Caoutchouc-mousse antibacterien contenant des nanoparticules d'argent et procede de production associe - Google Patents

Caoutchouc-mousse antibacterien contenant des nanoparticules d'argent et procede de production associe Download PDF

Info

Publication number
WO2006038761A1
WO2006038761A1 PCT/KR2005/001890 KR2005001890W WO2006038761A1 WO 2006038761 A1 WO2006038761 A1 WO 2006038761A1 KR 2005001890 W KR2005001890 W KR 2005001890W WO 2006038761 A1 WO2006038761 A1 WO 2006038761A1
Authority
WO
WIPO (PCT)
Prior art keywords
latex
silver
antibacterial
latex foam
present
Prior art date
Application number
PCT/KR2005/001890
Other languages
English (en)
Inventor
Seon-Woo Noh
Original Assignee
Seon-Woo Noh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seon-Woo Noh filed Critical Seon-Woo Noh
Publication of WO2006038761A1 publication Critical patent/WO2006038761A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
    • C08J3/09—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
    • C08J3/11—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids from solid polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C08J9/0071—Nanosized fillers, i.e. having at least one dimension below 100 nanometers
    • 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
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00—Compositions of natural rubber
    • C08L7/02—Latex
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2307/00—Characterised by the use of natural rubber
    • C08J2307/02—Latex
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2321/00—Characterised by the use of unspecified rubbers
    • 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
    • C08K2003/0806—Silver

Definitions

  • the present invention relates to latex foam and a method of producing the same, and more particularly, to latex foam with antibacterial activity and a method of producing the same.
  • Latex foam is generally produced by adding various additives such as a vul ⁇ canization accelerator, a vulcanizing agent, a hardener, a hardening accelerator and a foaming agent to rubber as a main component, and foaming the mixture to generate minute bubbles.
  • additives such as a vul ⁇ canization accelerator, a vulcanizing agent, a hardener, a hardening accelerator and a foaming agent to rubber as a main component, and foaming the mixture to generate minute bubbles.
  • latex foam Since latex foam is obtained by using rubber with high elasticity as a main component, generating minute bubbles therein and curing the material, it has a property of high softness and has been employed in various fields.
  • latex foam has been used for a latex mattress that is a kind of health care article.
  • Japanese Patent Laid-Open Publication No. (Hei)9-111053 is directed to Rubber containing an antibacterial agent, rubber gloves and a rubber finger thimble containing an antibacterial agent, and a method of producing the same, wherein the antibacterial agent is prepared by impregnating zeolite or silica gel with silver, copper, zinc or the like.
  • this cited invention employs a metal component such as silver, copper or zinc with high antibacterial activity, the metal component is employed not as it is but in a state where a carrier such as zeolite or silica gel is impregnated with the metal component.
  • a carrier such as zeolite or silica gel
  • this cited invention has a disadvantage in that an additional process for preparing the aforementioned silver- zeolite or silver-silica gel is required. Therefore, even though the cited invention uses silver exhibiting high antibacterial activity, zeolite or silica gel contains the silver component or the like therein and functions as a kind of complex. Thus, there is an intrinsic disadvantage in that it is impossible to fully use antibacterial activity exhibited by the silver component itself.
  • Korean Patent Laid-Open Publication No. 2002- 1896 is directed to "A method of preparing an antibacterial sanitary article using natural rubber latex," and discloses a method of preparing a sanitary article using natural rubber latex, which can inhibit the propagation and reproduction of microorganisms at a contact region with a human body.
  • Korean Patent Laid-Open Publication No. 2002-1896 also uses zeolite that bears silver ions or zinc ions as an antibacterial agent, it has the same disadvantage as the invention disclosed in Japanese Patent Laid-Open Publication No. (Hei)9-111053.
  • Korean Patent Laid-Open Publication No. 2004-64467 is directed to
  • a functional latex mattress, and a method and apparatus for producing a functional latex mattress discloses a method comprising the steps of aging an undiluted solution for latex for 12 to 36 hours, adding components such as vulcanization ac ⁇ celerators, vulcanizing agents, hardeners, hardening agents, oxidizing agents, fillers and charcoal powders to the solution in a colloidal state, foaming the aged latex solution for 30 to 40 minutes, molding the latex solution in a mold, and washing a resultant molded product.
  • this cited invention asserts that the addition of charcoal powders gives beneficial effects to a human body, the description of the publication does not provide objective data capable of supporting the assertion. Therefore, it is considered that the cited invention gives consequence to the mass- production of a latex mattress rather than imparting of functionality to the latex mattress, and the accompanying drawings also support such presumption.
  • a latex product particularly, antibacterial latex foam that is formed with a plurality of minute bubbles using latex as a base material and contains nano-silver particles capable of exhibiting its own antibacterial activity.
  • the present invention is directed to a method of producing antibacterial latex foam containing nano-silver particles, and antibacterial latex foam produced by the method.
  • the method of the present invention comprises the steps of: preparing a latex solution by mixing rubber latex as a base material with subsidiary materials according to a conventional method, wherein the subsidiary materials comprise 1.0 to 5.0 PHR of vulcanizing agent, 0.5 to 2.0 PHR of antioxidant, 0.2 to 5.0 PHR of vulcanization ac ⁇ celerator, 0.5 to 2.0 PHR of foaming stabilizer and 5 to 200 PHR of filler based on 100 weight parts of rubber latex; preparing an aqueous silver emulsion solution consisting of 0.005 to 0.1 weight parts of silver powder and 1 to 10 weight parts of silver dispersion for dispersing the silver powder therein based on 100 weight parts of rubber latex; preparing an antibacterial latex material by mixing the latex solution with the aqueous silver emulsion solution and aging the mixture; producing latex foam by foaming, vulcanizing and curing the antibacterial latex material; and post-processing the latex foam by molding, cooling, releasing and washing the produced latex
  • the present invention provides antibacterial latex foam produced by the above method, which contains 0.005 to 0.1 weight parts of silver powder based on 100 weight parts of rubber latex.
  • the method of producing the antibacterial latex foam according to the present invention can directly use silver powder, it has an advantage in that there is no need for additional preparation of a carrier containing a silver component contrary to con ⁇ ventional methods. Therefore, according to the method of the present invention, there are advantages in that it is not necessary to perform a process of additionally preparing a silver carrier (i.e., zeolite or silica gel containing a silver component) and to purchase the silver carrier at high expense.
  • a silver carrier i.e., zeolite or silica gel containing a silver component
  • the method of producing the antibacterial latex foam according to the present invention has an advantage in that the amount of a silver component to be used can be significantly reduced. This means that even though the method of the present invention uses the amount of an effective component smaller than that in a con ⁇ ventional method, it can produce latex foam with antibacterial activity comparable to that of an existing product. In particular, the method of producing the latex foam according to the present invention can sufficiently exhibit high antibacterial activity in a low concentration range that has been considered to be inappropriate in the prior art. Accordingly, the method of producing the latex foam according to the present invention has a significant advantage in view of the efficient use of finite resources.
  • the latex foam produced by the method of the present invention exhibits significantly high antibacterial activity.
  • the latex foam in a case of using the latex foam as a material for cosmetic puffs, there is an advantage in that such cosmetic puff can exert sterilizing effects on bacteria that infect the skin with which the cosmetic puffs are in contact, and thus, they can be very effectively used.
  • the latex foam produced by the method of the present invention exhibits high antibacterial activity, there is an advantage in that sterilizing effects thereof on bacterial infection can be applied to various uses.
  • the latex foam of the present invention is used for soles of sneakers, since the soles of sneakers themselves have antibacterial activity, it is possible to manufacture antibacterial sneakers that can sterilize various types of bacteria infecting the interiors of the sneakers without using an additional antibacterial agent. Accordingly, there is an advantage in that the latex foam of the present invention can be widely used for prevention of bacterial infection.
  • FIG. 1 shows measurement data of an antibacterial activity test for antibacterial latex foam of the present invention using Staphylococcus aureus at the FITI Testing & Research Institute in Korea.
  • FIG. 2 shows measurement data of an antibacterial activity test for antibacterial latex foam of the present invention using E. coli at the FTTI Testing & Research Institute in Korea.
  • FIG. 3 shows measurement data of an antibacterial activity test for antibacterial latex foam of the present invention using Klebsiella pneumoniae at the FITI Testing & Research Institute in Korea.
  • the present invention uses rubber latex as a base material. Unless specifically mentioned herein, the contents of components are based on 100 weight parts of rubber latex.
  • rubber latex herein includes synthetic rubber latex, natural rubber latex and a mixture thereof.
  • the synthetic rubber latex is preferably used since a product made thereof through emulsion polymerization at low temperature has uniform particles and low surface tension. It is preferred that the synthetic rubber latex can be easily mixed with natural rubber latex and low viscosity be maintained by regulating its solid content to a range of 60 to 80%.
  • the synthetic rubber latex includes chloroprene latex, oil-resistant latex (NBR LATEX) and the like.
  • the natural rubber latex includes ammonia-treated natural rubber latex and non-treated natural rubber latex. It is preferred that the ammonia-treated natural rubber latex be concentrated to have its solid content of about 60% through cen- trifugation and contain about 0.6 to 0.8% of ammonia as an antiseptic. In contrast, the non-treated natural rubber latex has no ammonia added as an antiseptic through an additional process.
  • ammonia-treated natural rubber latex is used as a base material, a "deammoniation" process is inevitably required. If the concentration of the ammonia component is high, the ammonia component contained in the latex hinders gelation upon production of latex foam. Thus, it is preferred that the ammonia component be removed in advance.
  • the "deammoniation"process can be effectively performed by slowly stirring the natural rubber latex at a low speed of about 30 to 70 rpm and causing the surface of the latex to come into contact with humid air.
  • the natural rubber latex be heated to about 40°C
  • the concentration of ammonia in the latex is preferably about 0.12 to 0.2%.
  • a method of measuring the content of ammonia in the latex can be performed as follows:
  • the rubber latex as a base material may comprise subsidiary components such as a vulcanizing agent, a vulcanization accelerator, an an ⁇ tioxidant, a foaming stabilizer, a filler and the like in the same manner as an ordinary case.
  • the vulcanization accelerator is used to shorten vulcanization time and to lower vulcanization temperature.
  • 0.1 to 3.0 PHR of EZ (zinc diethyl dithiocarbarmate) is used as a primary accelerator
  • 0.1 to 2.0 PHR of MZ (zinc mercaptobenzothiazol)
  • PHR zinc dibuthyl dithiocarbarmate
  • PHR means a percentage to the dry weight of the rubber latex raw material used in the present invention.
  • 1 to 5 PHR of sulfur is used as a vulcanization agent.
  • a cross-linking rate is too low to properly exhibit the performance of latex foam.
  • the degree of hardness of the latex foam is excessive, which is not desirable.
  • sulfur is normally used in the form of a 50 to 60 % dispersion.
  • the antioxidant includes phenols, preferably, styrenated phenol (SP) or 3,2-metylen bis 4-methyl-6-tert buthyl phenol. If a highly antioxidant function is required, it is preferred that a p-phenylenediamine-based antioxidant be used even though some stains may be generated.
  • the antioxidant is used in an amount of 0.5 to 2.0 PHR and in the form of an emulsion or dispersion.
  • the foaming stabilizer is a gel sensitizer and also called a secondary hardener.
  • a major function thereof is to smoothly perform a gelation reaction and an additional function thereof is to prevent collapse of bubbles and shrinkage of gel.
  • the foaming stabilizer includes TRIMEN BASE available from Naugatuck Chemical Co. or VULCAFOR EFT available from LCI. Ltd. These compounds are a reaction product of ethylene chloride, formaldehyde and ammonia, and are preferably used in an amount of 0.5 to 2.0 PHR.
  • cyclohexamine diphenylguanidine (DPG) or quaternary ammonium salts may be effectively used.
  • DPG cyclohexamine diphenylguanidine
  • Such compounds can also act as a vulcanization accelerating adjuvant.
  • the foam stabilizer contributes to stabilization of bubbles according to the following principle.
  • pH of the rubber latex is high, and a nonionic surfactant of soap maintains an emulsified state as an emulsifying agent under such a condition.
  • anions and cations of soap interact with each other, resulting in loss of an emulsifying function of the surfactant.
  • SSF sodium silicofluoride
  • SSF fluoric acid
  • the foaming stabilizer (TRIMENE B ASE) hinders the interaction of soap even in a low pH condition so that the latex raw material can continuously perform a gelation reaction in a stable state, thereby beforehand preventing bubbles from aggregating, breaking or shrinking.
  • the filler may be employed in view of cost reduction.
  • the filler may include inorganic components typically used, e.g., clay, calcium carbonate, talc, aluminum hydrate and the like, and powdery mica and magnesium silicate may also be used.
  • the filler is selected in consideration of the strength and processability of the latex foam before it is mixed with the rubber latex. Since a filler with a relatively larger particle size has a less harmful effect on the processing of latex foam rather than that with a relatively smaller particle size, it is desirable to use a filler with a larger particle size, more preferably, an average particle size of about 5 D.
  • the amount of the filler to be input may be determined in consideration of the composition of the latex foam, a production method, the type of the latex foam, and the like. For example, in case of latex form used for a cosmetic mask pack, it is desirable to use the filler in an amount of 5 to 20 PHR. In case of that used for slab stocks, it is desirable to use the filler in an amount of 40 to 60 PHR. In case of that used for a carpet, it is desirable to use the filler in an amount of 50 to 200 PHR.
  • the rubber latex as the base material and the aforementioned various subsidiary components are weighed and then mixed with each other according to a conventional method to obtain a latex raw material in the form of a milky liquid.
  • the latex raw material in the form of a milky liquid thus prepared is referred herein to as a latex solution. By doing so, the preparation of the latex solution is completed.
  • Step of preparing an aqueous silver emulsion solution comprises the step of preparing an aqueous silver emulsion solution containing 0.005 to 0.1 weight parts of silver powder and 1 to 10 weight parts of silver dispersion for dispersing the silver powder based on 100 weight parts of rubber latex as a base material.
  • the silver powder is included in an amount of 0.005 to 0.1 weight parts based on 100 weight parts of rubber latex as the base material.
  • the present invention is characterized by direct use of nanometer-sized fine silver particles as the silver powder. In case of direct use of the fine silver particles, even the addition of the minimum amount of silver particles also enables the use of intact antibacterial activity of the fine silver particles. (However, the prior arts do not directly use a silver component but uses it in the form of a carrier containing the silver component.)
  • the silver powder with a particle size of about 1 to 100 nanometer(D). Further, the silver powder preferably has physical properties such as a tap density of about 1.0 to 5.0 g/D and a specific surface area of about 0.5 to 5.0 D/g.
  • the content of the silver powder is too low such as less than 0.005 weight parts, a composition ratio of the silver component impregnated into a final latex foam product is too low, whereby the latex foam cannot have antibacterial activity.
  • the content of the silver component is too high such as greater than 0.1 weight parts, it is also undesirable because the antibacterial activity of a final product is not improved in proportion to the increased silver content.
  • the excessive silver component interacts with sulfur, which undesirably becomes a cause of generation of black spots on the surface of a final product.
  • the content of the silver powder in the present invention is sig ⁇ nificantly lower than that in the invention of Japanese Patent Laid-Open Publication No. (Hei)9-111053 that is the related art. More specifically, the Japanese Patent Laid- Open Publication No. (Hei)9-111053 clearly discloses that the content of an inorganic antibacterial agent ranges from 0.1 to 3.0 weight parts with respect to rubber latex, and the antibacterial agent has no antibacterial activity if the content of the inorganic an ⁇ tibacterial agent is in a range of less than 0.1 weight%.
  • the content of the silver powder in the present invention is only 0.005 to 0.1 weight parts based on 100 weight parts of rubber latex, it is possible to impart antibacterial activity to a final latex foam product. This fact shows that the method of the present invention overcomes technical difficulties that cannot be solved by a conventional method and sufficiently achieves significant effects.
  • the silver dispersion comprises 50 to 90 weight% of aqueous solution and 10 to 50 weight% of silver dispersing agent, based on the silver dispersion itself.
  • the silver dispersing agent may comprise an alkali component such as potassium hydroxide (KOH) and sodium hydroxide (NaOH) and an organic acid.
  • KOH potassium hydroxide
  • NaOH sodium hydroxide
  • an organic acid such as potassium hydroxide (KOH) and sodium hydroxide (NaOH)
  • the alkali component and the organic acid be used together in the aforementioned aqueous solution.
  • the silver emulsion solution is preferably prepared by uniformly mixing the alkali component and the organic acid in the aqueous solution, adding the silver powder thereto, and uniformly dispersing the mixture.
  • Silver powder was purchased from Nano MS Inc. in Korea and had granularity of 1 to 20 D.
  • the silver powder was prepared by weighing 0.1 g of 100% pure silver (purity 99.9%) powder in a flake form. Further, 75 g of water was prepared in a mixing container, 32 g of oleic acid and 18 g of potassium hydroxide were added thereto, and the mixture was then uniformly mixed. Thereafter, the silver powder was added to the mixing container and the mixture was stirred at 50 to 70 rpm for about 2 hours.
  • An antibacterial latex raw material is prepared in the present invention by mixing the latex solution obtained in the step of preparing the latex solution with the aqueous silver emulsion obtained in the step of preparing the aqueous silver emulsion solution, and aging the mixture.
  • the mixing of the latex solution with the aqueous silver emulsion solution can be conducted according to a conventional method.
  • NR latex natural rubber (NR) latex
  • the aging process is performed by gently stirring the antibacterial latex raw material at a temperature of 25 to 30°C for 10 to 24 hours.
  • a gelation reaction is more smoothly performed, the hardness of latex foam as a final product increases, and the occurrence of a shrinkage phenomenon decreases during a drying process, thereby avoiding the occurrence of a loose skin phenomenon in a final product.
  • the reaction temperature or the stirring time exceeds a proper range, the tensile strength of a final product obtained after the vulcanization is undesirably lowered and the tensile force thereof is decreased during a gelation reaction. If the aging process has been carried out, it is desirable to immediately use the latex raw material. If the aging process has been carried out but the latex raw material is not intended to be used im ⁇ mediately, it is important to store the aged antibacterial latex raw material at a temperature of 10 to 13°C.
  • a zinc oxidation process be performed before the vulcanization of the antibacterial latex raw material.
  • a standard mixing ratio for the zinc oxidation ranges from
  • the zinc oxidation performs two functions: one is to promote cross- linking caused by sulfur and the other is to support a gelation reaction due to the cross- linking. It is desirable to carry out the zinc oxidation in a 45 to 55% dispersion, and the dispersion should be input after stirring and filtration thereof because it easily pre ⁇ cipitates.
  • the zinc oxidation process can be applied to the latex raw material or antibacterial latex raw material. More preferably, the zinc oxidation process is applied at the step of preparing the latex solution if synthetic rubber latex is used as the latex raw material, whereas the zinc oxidation process is applied at this step if natural rubber latex is used as the latex raw material. This is because the natural rubber latex may be immediately cured by the zinc oxidation if the latex raw material is the natural rubber latex. In order to prevent these harmful effects, the zinc oxidation is applied just before the curing reaction caused by sulfur.
  • the present invention comprises the steps of foaming and vulcanizing the an ⁇ tibacterial latex raw material thus prepared above.
  • the foaming process may be performed according to a con ⁇ ventional method and in a batch or continuous mode.
  • a continuous mode there are advantages in that it is very economic because loss of latex can be prevented, and homogenous latex foam can be completely injected into a molding machine.
  • the continuous mode is preferred to the batch mode.
  • the vulcanization process is to cause the rubber latex raw material to be cross-linked and is carried out by using sulfur.
  • the vulcanization process is also carried out according to a conventional method.
  • the present invention comprises the step of performing post-processing, such as curing, cooling, releasing and washing, for the antibacterial latex raw material after the vulcanization process.
  • the present invention performs a curing process through a gelation reaction after the vulcanization process.
  • SSF sodium silicofluoride
  • SSF sodium silicofluoride
  • SSF in an amount of 0.5 to 5 PHR under a normal condition. If SSF is used in an amount of less than 0.5 PHR, the curing reaction is too weak to obtain desired effects. If SSF is used in an amount of greater than 5 PHR, the antibacterial latex raw material is partially gelated, which leads to un ⁇ desirable results.
  • SSF is typically prepared in the form of a 50% dispersion and is preferably used by diluting it to a 20 to 30% dispersion. Further, in case of the use of SSF, stirring and filtration thereof is necessary to prevent precipitation thereof.
  • the amount of SSF to be used is determined depending on several factors such as the kind of latex raw material, the amount of the silver emulsion solution to be used, the temperature of the antibacterial latex raw material during the aging process, the temperature of a workroom, and the inner temperature of the molding machine, regardless of the use of a filler. Further, in order to determine the amount of SSF to be used, time required for gelation of the antibacterial latex foam should be consecutively checked and tested, and then taken into consideration. Preferably, the time required for gelation of SSF after injected into a head of the molding machine is 3 to 7 minutes. Consequently, the amount of SSF to be used is not always fixed but is specifically determined case by case to conform to working conditions or environments.
  • the gelation process be performed within the molding machine.
  • a proper material for the molding machine is an aluminum alloy that is inexpensive and lightweight and has resistance to chemical corrosion. Since there is a tendency for cured latex foam to be shrunk smaller than a desired size after the drying process, it is desirable to prepare a molding machine with a size larger by about 5 to 15% than a desired product size.
  • Example 5 Antibacterial effects of antibacterial latex foam product>
  • the present inventor requested an antibacterial test to the FITI Testing & Research Institute in Korea.
  • the FTTI Testing & Research Institute measured the antibacterial activity of the latex foam product according to a SHAKE FLASK METHOD (KS M 0146-2003). Specifically, a test bacterial solution was subjected to shaking culture at 37+l°C for 24 hours, and the number of bacteria within the culture solution was counted.
  • a surface area of a test sample was 60 D, and Tween 80 (0.05%) was used as an non-ionic surfactant, i) Staphylococcus aureus (ATCC 6538), ii) E. coli (ATCC 25922), and iii) Klebsiella pneumoniae (ATCC 4352) were used as test strains.
  • Fig. 1 shows measurement results of a test for the antibacterial activity of Staphylococcus aureus conducted by the FI ⁇ Testing & Research Institute;
  • Fig. 2 shows measurement results of a test for the antibacterial activity of E. coli conducted by the FI ⁇ Testing & Research Institute; and [113] Fig. 3 shows measurement results of a test for the antibacterial activity of Klebsiella pneumoniae conducted by the FI ⁇ Testing & Research Institute.
  • Fig. 3 shows measurement results of a test for the antibacterial activity of Klebsiella pneumoniae conducted by the FI ⁇ Testing & Research Institute.
  • the latex foam of the present invention can be applied to various uses. For example, it can be used for soles of sneakers, cosmetic puffs, and latext mattress. Accordingly, there is an advantage in that the latex foam of the present invention can be widely used for prevention of bacterial infection.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

L'invention concerne un procédé permettant de produire un caoutchouc-mousse antibactérien contenant des nanoparticules d'argent et un caoutchouc-mousse antibactérien produit au moyen dudit procédé. Le procédé selon l'invention, qui constitue une amélioration par rapport aux procédés classiques de production de caoutchouc-mousse antibactérien, consiste : à préparer une solution de latex en mélangeant un latex d'élastomère-caoutchouc en tant que matériau de base avec des matériaux subsidiaires ; à préparer séparément une émulsion aqueuse contenant une fine poudre d'argent ; à mélanger la solution de latex et l'émulsion aqueuse avant de laisser vieillir le mélange afin de préparer un matériau brut de latex antibactérien ; enfin à mousser, à durcir et à gélifier le matériau brut de latex antibactérien afin d'obtenir le caoutchouc-mousse antibactérien. L'invention permet d'intégrer des particules d'argent à l'échelle nanométrique dans un caoutchouc-mousse à une faible concentration de façon que le caoutchouc-mousse présente une activité antibactérienne supérieure. Par conséquent, le caoutchouc-mousse selon l'invention peut être diversement appliqué à divers caoutchoucs-mousse et produits obtenus par le traitement du caoutchouc-mousse, lesquels caoutchoucs-mousse et produits sont destinés à prévenir la reproduction bactérienne.
PCT/KR2005/001890 2004-10-05 2005-06-17 Caoutchouc-mousse antibacterien contenant des nanoparticules d'argent et procede de production associe WO2006038761A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2004-0079258 2004-10-05
KR1020040079258A KR100495530B1 (ko) 2004-10-05 2004-10-05 은 나노 입자를 함유한 항균성 라텍스 폼 및 그 제조방법

Publications (1)

Publication Number Publication Date
WO2006038761A1 true WO2006038761A1 (fr) 2006-04-13

Family

ID=36142813

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2005/001890 WO2006038761A1 (fr) 2004-10-05 2005-06-17 Caoutchouc-mousse antibacterien contenant des nanoparticules d'argent et procede de production associe

Country Status (2)

Country Link
KR (1) KR100495530B1 (fr)
WO (1) WO2006038761A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102010528A (zh) * 2010-09-20 2011-04-13 华南理工大学 一种纳米银抗菌乳胶枕头或床垫及其制备方法
US20110195105A1 (en) * 2010-02-08 2011-08-11 Nanos John I Foam Cellular Matrix Impregnated With Anti-Microbial Active Agent For Use In Negative Pressure Wound Therapy Applications And Process For Producing The Same
US8852639B2 (en) 2010-02-18 2014-10-07 Crest Foam Industries Antimicrobial foam and method of manufacture
CN104693513A (zh) * 2014-09-05 2015-06-10 中国热带农业科学院农产品加工研究所 一种基于金、银纳米粒子/彩色天然橡胶纳米复合材料的制备方法
CN105601767A (zh) * 2016-02-02 2016-05-25 广东多正化工科技有限公司 净味天然橡胶乳液的制备方法
US20170073562A1 (en) * 2010-02-26 2017-03-16 Peterson Chemical Technology, Llc. Enhanced thermally conductive latex cushioning foams by addition of metal materials
CN107903453A (zh) * 2017-11-24 2018-04-13 龙岩学院 一种高力学性能抗菌减重拉力带的制备方法
CN111058291A (zh) * 2019-12-28 2020-04-24 杭州锴越新材料有限公司 高弹性及吸湿排汗性能优良的发泡材料及其加工方法
US11597862B2 (en) 2021-03-10 2023-03-07 L&P Property Management Company Thermally conductive nanomaterial coatings on flexible foam or fabrics
US11814566B2 (en) 2020-07-13 2023-11-14 L&P Property Management Company Thermally conductive nanomaterials in flexible foam

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100822497B1 (ko) 2007-04-16 2008-04-16 충북대학교 산학협력단 항균성 라텍스 폼 및 그 제조방법
KR101664581B1 (ko) * 2014-11-12 2016-10-10 현대자동차주식회사 라텍스 폼의 제조방법
KR101730557B1 (ko) * 2016-12-20 2017-04-26 박상훈 천연 라텍스를 이용한 멀티 기능성 매트 조성물과 그 제조방법
KR20200049005A (ko) 2018-10-31 2020-05-08 김정균 수열합성법에 의한 구리-티타늄 나노입자의 제조방법, 이 방법에 의해 제조된 구리-티타늄 나노입자 및 이를 함유하는 항균성 라텍스 폼
KR20200059011A (ko) 2018-11-20 2020-05-28 김정균 수열합성법에 의한 구리-아연 나노입자의 제조방법, 이 방법에 의해 제조된 구리-아연 나노입자 및 이를 함유하는 항균성 라텍스 폼
KR102196048B1 (ko) * 2019-05-29 2020-12-30 이한수 친환경 화장용 퍼프 제조방법 및 그에 의해 제조된 화장용 퍼프
CN113214548A (zh) * 2021-05-18 2021-08-06 青岛科技大学 一种天然发泡材料

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968285A (en) * 1971-03-15 1976-07-06 General Latex And Chemical Corporation One-part foamable latex composition
US5476881A (en) * 1993-02-15 1995-12-19 Suh; Kang I. Antimicrobial composition for manufacturing nipples
US6555599B2 (en) * 2001-03-26 2003-04-29 Milliken & Company Antimicrobial vulcanized EPDM rubber articles
KR20040064467A (ko) * 2003-01-13 2004-07-19 위성렬 라텍스 매트리스 및 기능성 라텍스 매트리스의 제조방법및 그 제조장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968285A (en) * 1971-03-15 1976-07-06 General Latex And Chemical Corporation One-part foamable latex composition
US5476881A (en) * 1993-02-15 1995-12-19 Suh; Kang I. Antimicrobial composition for manufacturing nipples
US6555599B2 (en) * 2001-03-26 2003-04-29 Milliken & Company Antimicrobial vulcanized EPDM rubber articles
KR20040064467A (ko) * 2003-01-13 2004-07-19 위성렬 라텍스 매트리스 및 기능성 라텍스 매트리스의 제조방법및 그 제조장치

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110195105A1 (en) * 2010-02-08 2011-08-11 Nanos John I Foam Cellular Matrix Impregnated With Anti-Microbial Active Agent For Use In Negative Pressure Wound Therapy Applications And Process For Producing The Same
US8852639B2 (en) 2010-02-18 2014-10-07 Crest Foam Industries Antimicrobial foam and method of manufacture
US11414583B2 (en) 2010-02-26 2022-08-16 L&P Property Management Company Enhanced thermally conductive latex cushioning foams by addition of metal materials
US20170073562A1 (en) * 2010-02-26 2017-03-16 Peterson Chemical Technology, Llc. Enhanced thermally conductive latex cushioning foams by addition of metal materials
US10526518B2 (en) * 2010-02-26 2020-01-07 L&P Property Management Company Enhanced thermally conductive latex cushioning foams by addition of metal materials
CN102010528A (zh) * 2010-09-20 2011-04-13 华南理工大学 一种纳米银抗菌乳胶枕头或床垫及其制备方法
CN104693513A (zh) * 2014-09-05 2015-06-10 中国热带农业科学院农产品加工研究所 一种基于金、银纳米粒子/彩色天然橡胶纳米复合材料的制备方法
CN105601767A (zh) * 2016-02-02 2016-05-25 广东多正化工科技有限公司 净味天然橡胶乳液的制备方法
CN107903453A (zh) * 2017-11-24 2018-04-13 龙岩学院 一种高力学性能抗菌减重拉力带的制备方法
CN107903453B (zh) * 2017-11-24 2020-06-02 龙岩学院 一种高力学性能抗菌减重拉力带的制备方法
CN111058291A (zh) * 2019-12-28 2020-04-24 杭州锴越新材料有限公司 高弹性及吸湿排汗性能优良的发泡材料及其加工方法
US11814566B2 (en) 2020-07-13 2023-11-14 L&P Property Management Company Thermally conductive nanomaterials in flexible foam
US11597862B2 (en) 2021-03-10 2023-03-07 L&P Property Management Company Thermally conductive nanomaterial coatings on flexible foam or fabrics

Also Published As

Publication number Publication date
KR100495530B1 (ko) 2005-06-16

Similar Documents

Publication Publication Date Title
WO2006038761A1 (fr) Caoutchouc-mousse antibacterien contenant des nanoparticules d'argent et procede de production associe
US5872173A (en) Synthetic latex compositions and articles produced therefrom
JP2008106099A (ja) タンパク分解天然ゴム、その製造法およびそれを含む組成物
JP2006307018A (ja) タンパク分解天然ゴムおよびそれを含む組成物
JP4726510B2 (ja) 天然ゴムマスターバッチ、その製造方法、これを用いたゴム組成物及びタイヤ
US2870109A (en) Coated silica aerogel, silicone rubber reinforced therewith and method of making
JPH0369947B2 (fr)
JP2005075900A (ja) シリカマスターバッチ及びその製造方法
JP5250206B2 (ja) 微生物分解した粉ゴムを用いた天然ゴム及び／又は合成イソプレンゴムマスターバッチの製造方法
US2484434A (en) Method of making sponge rubber
KR100653615B1 (ko) 은 나노 입자를 함유한 항균성 라텍스 폼 및 그 제조방법
JP4332587B2 (ja) 無機系発泡促進助剤及びその製造方法並びにポリマー組成物
JP3589842B2 (ja) 前加硫天然ゴムラテックスと水溶性ポリマーの混合物からの成形方法及びその成形品
US2444869A (en) Manufacture of sponge rubber
US20060057320A1 (en) Accelerator-free carboxylated latex compositions and articles
AU2005273723B2 (en) Rubber latex films having improved tear resistance
US3737399A (en) Polymer foams
JP2008184481A (ja) 原料ゴム組成物の製造方法
US2809174A (en) Manufacture of foamed latex sponge reinforced with glass fibers
US2290729A (en) Rubber material and method of and composition for making same
US2801274A (en) Manufacture of sponge rubber from foamed rubber latex
JP2004107436A (ja) ゴム発泡体用共重合体ラテックス
JP2004162063A (ja) 高シス−ポリブタジエンに予備分散されたジアクリル酸亜鉛
JP2000336102A (ja) フォームラバー
JP6803105B1 (ja) ラテックススポンジの製造方法及び当該方法によるラテックススポンジ

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 69(1)EPC, E.P.O. FORM 1205A DATED 14.06.07.

122 Ep: pct application non-entry in european phase

Ref document number: 05764980

Country of ref document: EP

Kind code of ref document: A1