KR20050105814A - Method for preparing clear beads having excellent antibacterial and sterilizing ability and good deodorant ability, clear beads prepared by the method and layered structure comprising a layer of the clear beads - Google Patents

Abstract

Disclosed are nanosilver, which has excellent antibacterial and / or bactericidal ability, vegetable deodorant which has excellent deodorizing ability, and fragrance containing beads, in particular transparent beads, and transparent beads prepared by the method. In addition, an aqueous gel comprising a transparent bead layer composed of transparent beads prepared in this manner, and an aqueous gel containing a pearl agent containing calcium alumina boron silicate as a main ingredient in gellan gum having a high thermal stability and transparency having high transparency at the bottom thereof. A laminate comprising a layer at a ratio of 60 to 75:25 to 40, wherein a laminate in which at least 5% of the leachate of the transparent bead layer is removed is disclosed.

Description

Method for preparing transparent beads having excellent antibacterial and sterilizing ability and excellent deodorizing ability, and a method for preparing clear beads having excellent antibacterial and sterilizing ability and good deodorant ability, clear beads prepared by the method and layered structure comprising a layer of the clear beads}

The present invention relates to a method for producing beads containing nanosilver, which has excellent antibacterial and / or bactericidal ability, vegetable deodorant which has excellent deodorizing ability, and fragrance, in particular transparent beads, and transparent beads produced by the method. More specifically, the present invention contains nanosilver having excellent antimicrobial and / or bactericidal ability without discoloration to black, contains a vegetable deodorant having excellent deodorizing ability, and absorbs only lipophilic substances such as fragrance with pure water most effectively. Method for manufacturing transparent beads using superabsorbent resin, such as sodium acrylate copolymer, which includes the process of absorbing the leachate produced thereby and the process of absorbing the beads as effectively as possible. It relates to a transparent bead produced by. In addition, the present invention is a transparent bead layer composed of the above-mentioned transparent beads and the lower portion thereof is a gelling agent added to the gellan gum (Gellan Gum) that is excellent in thermal stability and transparency at a high temperature at a high temperature and contains a pearl component of calcium aluminum boron silicate as a main component A laminate comprising an aqueous gel layer consisting of an aqueous gel.

Deodorants are agents that remove or weaken odors. Commonly used deodorant is, for example, the principle of adsorption by an adsorbent such as activated carbon. In addition, deodorants are also used to neutralize or decompose malodorous components. In some cases, a method of first changing the odor and then removing the odor is used. Non-limiting examples of components of the deodorant using this method include wood vinegar, bamboo vinegar. Recently, flavonoid-based deodorants extracted from plants have been used. Flavonoids are generic names of plant pigments having a carbon skeleton of C ₆ -C ₃ -C ₆ , and include flavones, flavanones, isoflavones, antoclones, anthocyanins, and catechins. In plants, it is produced from malonyl CoA and cinnamic acid.

Silver (Ag) has long been known for its excellent antibacterial and / or antiseptic properties. Silver with these properties has recently come to be more powerful in terms of nanoparticles (nm; 10 ^-9 m) particles (also called "nanosilver"), especially stronger antimicrobial, sterilization, deodorization, electromagnetic shielding, etc. when the particle size is 10 nm or less. It is reported to have characteristics. Such silver has a pale yellow color in nanometer units, especially 10 nm or less, but becomes black due to discoloration by oxidation in larger particle units, especially micrometer units. In the former case, despite the excellent antimicrobial and / or bactericidal ability as described above, the smaller the particle size, the higher the cohesion and the weaker the ultraviolet (UV) light. For this reason, it is not easy to apply nanosilver directly to products. In the latter case, not only the ability of antibacterial and sterilization is reduced, but also the product value is reduced by discoloration to black.

In addition, colloidal silver is generally produced in the form of being dispersed in water by electrolysis, liquid phase reduction, grinding, etc. Among them, the electrolytic method has been more commonly used. However, colloidal silver obtained in the form of water dispersion is not well dispersed because the surface of the fiber or plastic is lipophilic when treated in fiber or plastic, so there is a limit to the practical application.

For the reasons listed above, products developed in the form of not only functions as deodorants and fragrances but also functions as antibacterial and / or fungicides with excellent antimicrobial and / or sterilization ability using nano silver are developed. It didn't work. In particular, the problem of cohesion of nanosilver and discoloration due to UV reduces the marketability of the product to be manufactured, and thus, development of a product having transparency without such a problem is required. Furthermore, there is a demand for a form capable of producing the maximum effect (maximum effect related to the above functions) as one unit that combines the above three functions, namely, a function as a deodorant, a function as a fragrance, and a function as an antibacterial or bactericide. .

Surprisingly, the present inventors have found that the use of carrier type silver in which silver ions (Ag ⁺ ) are substituted for natural inorganic minerals other than colloidal silver provides the antimicrobial and / or bactericidal efficacy of silver without the problem of discoloration as described above. I discovered that it can be revealed as it is. In addition, the present inventors have found that silver is dispersed unreliably and stably in lipophilic substances such as vegetable deodorants and fragrances when certain nonionic and anionic surfactants and certain solvents are used. Furthermore, the inventors have found that the above-described unit form ("bead") has a synergistic effect when laminated in a predetermined ratio with the aqueous gel described below.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is nano silver with excellent antibacterial and / or bactericidal ability with vegetable deodorant and flavor without problems of aggregation between particles and discoloration by UV It is to provide a method for producing non-uniformly contained beads, in particular transparent beads.

Another object of the present invention is to provide beads produced by this method.

It is still another object of the present invention to laminate a predetermined ratio of an aqueous gel layer containing a pulsate mainly composed of a chemical such as calcium aluminum boron silicate having excellent thermal stability even at a high temperature and a transparent bead layer composed of the above-mentioned transparent beads. The purpose of this invention is to provide a laminate having an enhanced function.

In order to achieve the above object, the present invention,

(a) preparing a carrier-type silver substituted with silver ions, a vegetable deodorant, a fragrance, and a superabsorbent sodium polyacrylate-based resin;

(b) impregnating the sodium polyacrylate-based resin with the carrier-type silver, vegetable deodorant and fragrance together with ethanol and a predetermined ratio of surfactant to create a transparent solubilization state;

(c) removing the resulting leachate, to provide a method for producing a transparent bead having excellent antibacterial and antiseptic ability and excellent deodorizing ability and a transparent bead prepared by the method.

According to the present invention, the nano-silver is a carrier type silver in which silver ions (Ag ⁺ ) are substituted for natural inorganic minerals. Non-limiting examples of such natural inorganic minerals include calcium oxide, silica, alumina and the like. In addition to such carrier silver, colloidal silver may also be used. However, since colloidal silver is easily discolored by UV, it may not be suitable for preparing transparent beads.

In a preferred embodiment, the nanosilver is preferably used in an amount of 300 ppm to 3000 ppm for effective antibacterial and / or sterilization. When the silver is used in an amount of less than 300ppm, antimicrobial and / or bactericidal capacity is decreased when applied to a single unit bead, and there is a fear of precipitation when used in an amount exceeding 3000ppm.

According to the present invention, as a vegetable deodorant, a flavonoid-based deodorant extracted from plants, for example, green tea leaves, persimmon leaves and the like is used. In addition, wood, bamboo extract, such as wood vinegar, bamboo vinegar solution may be used. Alternatively, any vegetable deodorant in the form of a clear solution which functions as a deodorant may be used.

According to the present invention, superabsorbent resins are used to produce transparent beads. Non-limiting representative examples of such superabsorbent resins are sodium polyacrylates.

According to the present invention, ethanol and surfactant are used to solubilize the carrier-type silver, vegetable deodorant and fragrance in a transparent state. In particular, surfactants are mainly used for the purpose of absorbing lipophilic substances as effectively as possible into beads which absorb only pure water most effectively. At this time, the amount of vegetable deodorant such as fragrance, ethanol and flavonoid-based deodorant is preferably 0.1 to 2.0%, 2 to 10% and 2% or less, respectively. Under these conditions, the surfactant should be added at least three times higher than the amount of fragrance. As surfactant added at this time, it is preferable that the nonionic surfactant and anionic surfactant whose HLB (Hydrophile-Lipophile Balance) value is 8-18 are added in the quantity of 40-60: 40-60. The HLB value is a measure of the dissolution of the surfactant in water and indicates the relative strength of the hydrophilicity of the hydrophilic group as compared to the strength of the hydrophobic group hydrophobicity. For example, the HLB value of a compound such as paraffin that does not possess a hydrophilic group is 0, and the HLB value of a compound such as polyethylene glycol, which is a complete hydrophilic group having no hydrophobic groups, is 20. HLB is greater than 3.5 to less than 6 in the case of emulsions of oil in water type, and HLB is greater than 8 to less than 18 in the case of water in oil type emulsions. The addition ratio of such nonionic surfactants and anionic surfactants may be selected by those skilled in the art according to the type of fragrance.

According to the present invention, the resulting leachate receives beads directly from the reactor in an auxiliary tank with a screen installed at one-third point and then is removed for 20 to 30 minutes. In a preferred embodiment, the removal rate of leachate is preferably 5% to 10%. At this time, it should be noted that the bead may be broken if the pressure is forced to remove the leachate.

The beads of the present invention produced by this series of processes not only have excellent antibacterial and / or bactericidal ability, but also excellent deodorizing ability. In addition, the beads produced by the manufacturing method of the present invention are expected to have a high merchandise value because they are transparent by themselves and are transparent.

The present invention also comprises an aqueous gel comprising a transparent bead layer composed of the above-mentioned transparent beads and a pearl gel containing a pearl agent having calcium aluminum boron silicate as a main component in a gellan gum having excellent thermal stability and transparency at high temperatures at the bottom thereof. It is a laminated body containing a layer in the ratio of 60-75: 25-40, Comprising: It aims at providing the laminated body from which the leachate of the said transparent bead layer removed 5% or more.

Gelan gum (Gellan Gum) is a by-product obtained by fermenting microorganism Pseudomanas elodea , and contains glucose: glucuronic acid: rhamnose in a ratio of 2: 1: 1. One of the main features of gellan gum is that it interacts with almost all cations, including hydrogen ions, to form a gel. Since the affinity with each ion is different, divalent cations have a much stronger affinity than monovalent cations, Gels can be made at concentrations as low as 0.05-4%, and gel strength can be controlled by manipulating ion concentrations. In addition, gellan gum can make a transparent gel and is excellent in heat resistance and acid resistance.

According to the present invention, the scented gellan gum with excellent thermal stability and transparency at high temperature contains a pearl agent. As a pearl agent, the pearl agent whose main component is calcium aluminum boron silicate is used. Calcium aluminum boron silicate has excellent dispersibility and is well suited for the present invention.

As one preferred embodiment, pearls with particle sizes ranging from 20 to 200 micrometers can be used for effective dispersibility in the gel. When pearl particles having a particle diameter of less than 20 micrometers are used, they are not dispersed but rather float on the surface. In contrast, pearl particles having a particle diameter exceeding 200 micrometers tend to sink to the bottom. At this time, the use of an acrylic pearlescent agent as a pearling agent should be avoided as much as possible, because when the acrylic pearlescent agent is used, the stability of the aqueous gel may be drastically deteriorated.

As another preferred embodiment, the introduction of pearl during the process is preferably made prior to the fragrance addition. This is to ensure sufficient stirring time.

According to the present invention, the ratio of the transparent bead layer 10L composed of the prepared transparent beads 10 and the aqueous gel layer 20L including the aqueous gel 20 is 60 to 75: 25 to 40. desirable. In any case, the proportion of aqueous gel layer should not exceed 40%. At this time, in order to ensure the stability of the aqueous gel 20, the leachate of the transparent bead layer (10L) should be removed at least 5%. This is because the aqueous gel can be released at a high temperature when the leachate is large.

Evaluation of the Antimicrobial and / or Bactericidal Capacity of Transparent Beads

Silver Jelly Bead (Silver Jelly Bead) was added to sterile saline to 10% to test the sterilization effect. As a result of evaluating the bactericidal capacity at 10% concentration for silver jelly beads, Escherichia coli and Pseudomonas aeruginosa increased slightly after 5 hours and Staphylococcus aureus decreased by more than 99.9%. Overall, E. coli and Pseudomonas aeruginosa were increased after 5 hours, but compared with the control.

As mentioned above, in addition to the fact that the beads of the present invention are transparent (in terms of merchandise value), they are not only excellent in antibacterial and / or sterilizing ability, but also harmless to the human body. In addition, the laminate composed of the transparent bead layer composed of the transparent beads of the present invention and the aqueous gel layer containing the aqueous gel described above stably exhibits the above-described antibacterial and / or bactericidal ability in addition to the fact that it is excellent in appearance. It is also harmless to human body and can be used anywhere.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated.

1 is a view showing a state in which a transparent bead layer and an aqueous gel layer composed of transparent beads prepared by the method of the present invention are laminated.

* Description of the symbols for the main parts of the drawings *

10: transparent bead 10L: transparent bead layer

20: aqueous gel 20L: aqueous gel layer

Claims (10)

(a) preparing a carrier-type silver substituted with silver ions, a vegetable deodorant, a fragrance, and a superabsorbent sodium polyacrylate-based resin; (b) impregnating the sodium polyacrylate-based resin with the carrier-type silver, vegetable deodorant and fragrance together with ethanol and a predetermined ratio of surfactant to create a transparent solubilization state; (c) removing the resulting leachate to produce a transparent bead having excellent antibacterial and bactericidal ability and excellent deodorizing ability. The method of claim 1, wherein the carrier-type silver is characterized in that the silver ion is substituted in the form of a natural inorganic mineral selected from the group consisting of calcium oxide, silica and alumina. The method of claim 1 or 2, wherein the amount of silver used is 300ppm to 3000ppm. The method according to claim 1 or 2, wherein the vegetable deodorant is a flavonoid-based deodorant extracted from a plant. A method according to claim 1 or 2, characterized in that the proportion of the fragrance, ethanol and vegetable deodorant is 0.1 to 2.0%, 2 to 10% and 2% or less, respectively. The method according to claim 1 or 2, wherein the surfactant comprises a nonionic surfactant and an anionic surfactant having an HLB value of 8 to 18, wherein the ratio of the nonionic surfactant and the anionic surfactant is 40 to 60 : Method characterized in that 40 to 60. A process according to claim 1 or 2, characterized in that the removal rate of leachate is between 5% and 10%. A transparent bead having antimicrobial, antiseptic and deodorizing ability, prepared by the method according to claim 1. An aqueous gel layer comprising a transparent bead layer composed of a transparent bead according to claim 8 and an aqueous gel containing a pearl agent containing calcium aluminum boron silicate as a main component in a gellan gum having excellent heat stability and transparency having high transparency even at high temperatures. Laminated body containing. The laminate according to claim 9, wherein the transparent bead layer and the aqueous gel layer are present in a ratio of 60 to 75:25 to 40.