JPH08164393A - Resin composition for anti-underwater microorganisms - Google Patents

Abstract

PURPOSE: To make it possible to prohibit the growth of a wide range of bacteria, fungi and algae over a long period of time by compounding carriers holding antimicrobial chemicals and metallic powder into resins. CONSTITUTION: This resin compsn. for anti-underwater microorganisms having an effect of prohibiting the growth of a wide range of the bacteria, fungi and algae over a long period of time is prepd. by compounding the carriers holding the antimicrobial chemicals and the metallic powder into the resins. Inorganic based antimicrobial agents such as zeolite contg. metals having a sterilizing effect are preferably used as the antimicrobial agents. The antimicrobial agents prepd. by holding one or more than two kinds of the metals selected from silver, copper and zinc on the porous zeolite as carriers in an ion state are more particularly preferable. The metallic powder includes, for example, silver, zinc and copper compound. The resins include, for example, a polyethylene, polypropylene, nylon, polyethylene terephthalate, polybutyrene terephthalate, ABC resins, etc.

Description

Detailed Description of the Invention

[0001]

[Industrial application] The present invention is a resin in which an antibacterial agent and a metal powder are kneaded in a high concentration to form a pellet, and the pellet is brought into contact with water to exhibit antibacterial, antifungal and antialgal effects in water. The present invention relates to a resin composition for anti-microorganisms.

[0002]

2. Description of the Related Art In the case of sterilizing bacteria, mold and algae in water, the effect is immediately exhibited by spraying the drug on water. However, the effect of the drug tends to disappear in a short time due to the bactericidal action, and the use period tends to be very short. In addition, the algae-proof effect was not obtained sufficiently even for products that retained the bactericidal effect by using silver- and copper-based zeolites.

[0003]

DISCLOSURE OF THE INVENTION The present inventors have focused their attention on the sterilization of a wide range of bacteria, molds and algae existing in water, and their effect sustainability, and as a result of continuing research, antibacterial agents have been found to be antibacterial at a specific ratio. The present invention has been completed by finding out that the above problems can be solved by blending two points of an agent and a metal powder, and the purpose of the present invention is to grow a wide variety of fungi, molds and algae over a long period of time. It is intended to provide a resin composition for anti-water microorganisms having an inhibiting effect.

[0004]

[Means for Solving the Problems]
This is achieved by a resin composition for anti-water microorganisms, which is characterized in that a carrier holding an antibacterial agent is mixed with a metal powder. Hereinafter, the present invention will be described in detail.

In the present invention, as the antibacterial agent, it is preferable to use an inorganic antibacterial agent such as zeolite containing a metal having a bactericidal action from the viewpoint of antibacterial property when blended with a resin, particularly silver and copper. , One in which one or more metals selected from zinc are held in an ionic state in a porous zeolite is preferable. As a zeolite suitable as a carrier for holding an antibacterial agent, a porous zeolite having an ion exchange capacity of 1 meg / g (anhydrous standard) or more and a large specific surface area is preferable. For example, synthetic zeolites of A type, X type, Y-type zeolite and synthetic mordenite are preferable. On the other hand, natural zeolites include mordenite, crobutyrolite,
Chabasite and the like are preferable. Further, since it is contained in the resin, a powdery product whose particle size is as small as possible is preferable, and in particular, active zeolite powder having an average particle size of 15 μm or less is suitable for uniform dispersion. It is preferable that the above-mentioned powder has as little secondary aggregation as possible.

By using the zeolite having such characteristics, the amount of the above-mentioned antibacterial metal ions alone or a plurality of the antibacterial metal ions can be arbitrarily adjusted by an ion exchange method to prepare an antibacterial agent having a desired antibacterial property. be able to. The amount of the bactericidal metal compounded is preferably 0.005% by weight to the amount of saturation with respect to the entire antibacterial agent. Here, the saturation amount is the saturation value of the ion exchange amount of the zeolite used. A more preferable metal content is 0.1 to 5.0% by weight. Regarding the water content, it is preferable that the water content is activated by heating to adjust the water content to 5% by weight or less. The content of the antibacterial agent used in the present invention is preferably 100 parts by weight of the resin,
10 to 90 parts by weight, more preferably 15 to 60 parts by weight.

Next, the metal powder having antibacterial and bactericidal properties will be described. The bactericidal action of heavy metals is not due to the inherent toxicity and bactericidal properties of the metals, but the surface oxidation of these metals or the trace amount of oxygen in the solution containing the metal acts on them very little, dissolved in a trace amount, and generated by dissociation. It is more appropriate to think that it is caused by metal ions. As is well known, heavy metals have a bactericidal action. And its strength is mercury, silver, copper, zinc, iron,
It is said that lead and bismuth are in that order, but the bactericidal power actually depends on the solubility and dissociation degree of these metal salts. For example, copper ions have a bactericidal action against microorganisms, viruses and algae, and zinc ions also have a bactericidal action. Further, copper is indispensable to the human body as a constituent component of metallic oxygen. There is little accumulation of copper and zinc compounds,
It is considered to be a relatively safe substance with low toxicity. Silver itself ionization tendency smaller, is used in a stable metal foods, which is also used as a disinfectant in the form of ₃ such AgNo soluble. Further, AgF is used as a mildew-proofing agent, and silver lactate and silver citrate are used as sterilizing agents, disinfectants, antipyretic agents and the like.

The antibacterial and bactericidal action of the above silver, zinc and copper compounds is considered to be due to dissociated metal ions. That is, it is considered that these ions are adsorbed on the protein and cause metabolic inhibition. The content of the above metal powder used in the present invention is preferably 10 per 100 parts by weight of the resin.
~ 90 parts by weight. In addition, in order to add the antibacterial agent and the metal powder to the resin, it is preferable that the antibacterial agent and the metal powder are first mixed in high concentration and kneaded and granulated by an extruder. Among them, the antibacterial agent and the metal powder are added, and the addition amount is one, but the bactericidal effect of water is exerted even if only one type is used. Demonstrate.

According to the present invention, by blending the antibacterial agent, the metal powder and the resin, the bactericidal action of water can be exerted in a wide range and the effect can be maintained for a long period of time. Will be things. Examples of the resin include polyethylene, polypropylene, nylon, polyethylene terephthalate, polypropylene terephthalate, and ABC resin.

[0010]

[Examples] The following examples and comparative examples show the antibacterial, antifungal and antialgal properties of the resin composition for water sterilization.

Examples 1-3. Comparative Examples 1 to 3 Homopolypropylene (HPP), Nylon (PA), Low Density Polyethylene (LD-PE) 100 parts by weight for each Table 1
As shown in, the pellets prepared by extrusion-granulating a resin containing a metal compound and an antibacterial agent at high concentrations were used to measure the antibacterial, antifungal and antialgal properties. The results are shown in Tables 2 and 3.

[0012]

[Table 1]

Additives used in Examples and Comparative Examples are as follows. Antibacterial agent: K: Ag, Cu ion-supporting antibacterial zeolite (manufactured by Kanebo Co., Ltd.) Metal compound: A: Silver powder B: Copper powder Z: Zinc oxide powder Antibacterial and antifungal property: Measuring method: After culturing bacteria and mold The number of bacteria was adjusted, and 0.75 g of the prepared bacterial solution and the above-mentioned composition pellet were put into an Erlenmeyer flask (bath ratio 100: 1), and after 10 days, 30
The number of bacteria and the number of initial bacteria after 50 days were measured and evaluated by the sterilization rate.

[0014]

[Table 2] * ・ ・ ・ Karashiken: Confirm the change over time of only bacteria without pellets

In the above table, x to ⊚ were evaluated according to the following criteria. ◎: Sterilization rate: 80% or more ○: 〃: less than 80% to 60% or more □: 〃: less than 60% to 30% or more △: 〃: less than 30% to 0% or more ×: 〃: increase the number of bacteria

According to Table 1 in the algae-proof outdoor water tank (cooling tower such as an air conditioner). 5 kg of pellets were added and the algae generation state was visually confirmed.
(Total water volume 200 l, flow velocity 65 l / min)

[0017]

[Table 3] ⊚: No algae breeding was observed in the aquarium. ○: 〃 Some breeding is observed. Δ: Algal reproduction was observed in about half of the aquarium. ×: 〃 on the whole

[0018]

The resin composition for anti-water microorganisms of the present invention comprises:
It exerts a sufficient growth inhibitory effect even on a wide variety of bacteria, molds and algae that could not be solved until now. Further, by highly kneading the resin into the resin, the area in contact with water becomes large, and the effect of consolidating is also excellent. The resin composition of the present invention having such characteristics has a cooling tower (cooling tower), a bath ( Suitable for household and public use, water supply and drainage facilities (elevated water tank, hot water storage tank, etc.), circulation, and water storage equipment (equipment).

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location C02F 1/50 F S T U (72) Inventor Yoshikazu Kimura 1-4 Minamimorimachi, Kita-ku, Osaka No. 19 Kanebo Kasei Co., Ltd.

Claims (1)

[Claims] 1. A resin composition for anti-water microorganisms, characterized in that a carrier holding an antibacterial agent and a metal powder are mixed in the resin.