JPH0788286B2 - Antibacterial agent and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to an antibacterial agent and a method for producing the same, for example, general building materials such as filters, floor materials, wall materials and ceiling materials, fire fighting clothes, cooling water for cooling towers, cutting oil. , Slime control agents, wrapping paper for medical equipment, and antibacterial and antibacterial agents for plastic films.

(Prior Art) Conventionally, various methods have been proposed as an antibacterial agent obtained by adhering an antibacterial metal to some protective substrate.

For example, a sterilizer for water treatment in which a silver salt is attached to a vinylon non-woven fabric has been proposed, but this has a drawback that its application is limited due to the shape of the protective substrate.

In addition, although an antibacterial composition composed of zeolite, carbonate, etc. and an antibacterial metal has been proposed, it is difficult to make paper together with pulp to develop into an antibacterial paper. There are limitations.

(Problems to be Solved by the Invention) An object of the present invention is to solve the drawback of the prior art, that is, the use thereof is limited by the base material to which the antibacterial metal is fixed.

(Means for Solving Problems) The present invention relates to an antibacterial agent obtained by fixing a metal having an antibacterial effect to whiskers, and a method for producing the same.

The antibacterial metal used in the present invention may be any one having antibacterial properties. As a preferable specific example, one selected from the group consisting of silver, copper, zinc, platinum and the like can be used.

The whiskers used in the present invention may be those capable of immobilizing the above-mentioned antibacterial metal, for example, magnesium pyroborate whiskers, silicon nitride whiskers, silicon carbide whiskers, inorganic polymer whiskers such as potassium titanate whiskers, poly Examples thereof include organic polymer type whiskers such as (oxymethylene) whiskers. Suitable average particle size of whiskers is about 0.01-2
μm, the average fiber length is preferably about 0.5 to 5,000 μm, and the aspect ratio is preferably about 50 to 2,500.

As described above, the combination of the antibacterial metal and the whiskers is not particularly limited, but a combination of silver, copper, zinc and potassium titanate whiskers is preferable.

Next, the manufacturing method of the antibacterial metal-containing whiskers according to the present invention is very simple because the metal plating technique also called electroless plating or chemical plating can be applied as it is.

(Effects of the Invention) By using the antibacterial metal-containing whisker of the present invention, the antibacterial activity inherent to the antibacterial metal can be widely used and at the same time, the whisker has characteristics such as heat resistance, heat insulation, reinforcement and abrasion resistance. It is possible to take advantage of the sex and the like, and it is possible to solve the conventional problems. Therefore, by using the antibacterial metal-containing whisker of the present invention, it is possible to expand the applications of the antibacterial metal by taking advantage of the features of the whisker.

(Examples) Hereinafter, examples and test examples will be described in detail.

Example 1 Potassium titanate whiskers (manufactured by Otsuka Chemical, TISMO) in an aqueous solution containing 15 g of stannous chloride and 10 ml of hydrochloric acid.
Was dispersed in a bath ratio of 1 g /, stirred at room temperature for 3 minutes, separated, washed with water, and then palladium chloride 2 g / and hydrochloric acid 20 m
It was added to an aqueous solution of 1 / so as to have a bath ratio of 1 g /, stirred at room temperature for 2 minutes, separated, washed and dried. The surface of the obtained composition (hereinafter abbreviated as T-Pd) was coated with metallic palladium.

Next, using T-Pd, copper sulfate 35g /, rotsucel salt 170g /
, Caustic soda 50g /, sodium carbonate 30g / and EDTA20
After 20% of 37% formalin was added to an aqueous solution of ml /, the bath ratio of the aqueous solution was adjusted to 1 g / 4.5, and the mixture was stirred at room temperature for 3 minutes, washed separately, and dried.

As a result, 25 g of metal adhered to 1 g of TISMO and an antibacterial metal-containing whisker antibacterial agent (hereinafter abbreviated as T-Cu) having a surface covered with metallic copper was obtained.

Example 2 Using the T-Cu obtained in Example 1, the bath ratio was adjusted to 1 g / with an aqueous solution of silver nitrate 7.5 g /, sodium thiosulfate 105 g / and ammonia water 75 g /, and the mixture was stirred at room temperature for 5 minutes. Separately, washed with water and dried.

As a result, an antibacterial metal-containing whisker antibacterial agent (hereinafter abbreviated as T-Ag) in which 10 g of metal adhered to 1 g of TISMO and the surface of which was covered with metallic silver was obtained.

Example 3 Using the T-Pd obtained in Example 1, an aqueous solution consisting of zinc chloride 19 g /, sodium citrate 25 g /, sodium hypophosphite 20 g /, sodium acetate 5 g / and ammonium chloride 5 g / was used. Otherwise, in the same manner as in Example 2, an antibacterial metal-containing whisker antibacterial agent (hereinafter abbreviated as T-Zn) in which 15 g of metal adhered to 1 g of TISMO and whose surface was covered with metallic zinc was obtained.

An antibacterial metal-containing whisker antibacterial agent (hereinafter abbreviated as T-Pt) whose surface was covered with metallic platinum was also obtained by the same method.

Test Example 1 Using the antibacterial metal-containing whisker antibacterial agents obtained in Examples 1 to 3, the composition shown in Table 1 below was used (a) mixing roll; D = 10 in.16 rpm (b) roll temperature × time; 140 to 145 ℃ x 5 minutes (c) Sheet thickness: Knead under the condition of 0.5mm to make a sheet, and use this sheet
According to JIS Z2911, fungus antibacterial test was performed. The results are shown in Table 2.

In Table 2, Nos. 1 to 5 correspond to the cases where the sample contents are 0, 0.067, 0.100, 0.133 and 0.200 wt% with respect to PVC, respectively.

In addition, + means spore attachment, s means spore attachment, and-indicates no change.

Claims (4)

[Claims] 1. An antibacterial agent obtained by fixing a metal having an antibacterial effect to whiskers. 2. The antibacterial agent according to claim 1, wherein the whiskers are potassium titanate whiskers. 3. The antibacterial agent according to claim 1 or 2, wherein the antibacterial metal is at least one selected from the group consisting of silver, copper, zinc and platinum. 4. A method for producing an antibacterial agent, which comprises reducing at least one metal ion selected from the group consisting of silver, copper, zinc and platinum and fixing it on the surface of whiskers.