JP2001115042A - Water absorbing material - Google Patents

Abstract

(57) [Summary] [Problem] To provide a water-absorbing material which can provide a reliable sterilization effect by simple processing, and is excellent in safety and workability. SOLUTION: (A) a water-absorbing polymer and (B) an inorganic peroxide
(C) A water-absorbing material comprising a composition containing tetraacetylethylenediamine at a specific weight ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-absorbing material having a bactericidal property.

[0002]

2. Description of the Related Art In order to prevent hospital-acquired infections in hospitals and nursing homes and food poisoning in food factories and kitchens, sufficient collection of bacteria-contaminated body fluids, blood, effluents, meat juices, vegetable juices and the like is required. Must be disposed of. Since these contaminants generally contain a large amount of liquid components, they are absorbed and absorbed by a water-absorbing material such as cloth or paper, and then discarded or incinerated.

[0003]

However, the above-mentioned treatment is a time-consuming method, and it has not been possible to sufficiently prevent the generation of offensive odor and the propagation of bacteria during the treatment. As a result, it may not be sufficient for complete treatment of contaminants.

[0004] It is an object of the present invention to provide a water-absorbing material which can provide a reliable sterilization effect by simple processing and which is excellent in safety and workability.

[0005]

According to the present invention, (A) a water-absorbing polymer, (B) an inorganic peroxide and (C) tetraacetylethylenediamine are obtained by adding (A) / [(B) + (C)] = Provided is a water-absorbing material having a bactericidal property, comprising a composition containing the composition in a weight ratio of 3 to 100 and (B) / (C) = 0.5 to 10.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The water-absorbing polymer (A) used in the present invention is obtained by slightly cross-linking (three-dimensionally) a water-soluble resin to make it insoluble in water, and is an anionic polymer or a nonionic polymer. Polymers are common. However, this does not preclude the use of a cationic polymer such as a quaternary ammonium salt or the use of a zwitterionic polymer. However, from the viewpoint of versatility and the like, an anionic polymer or a nonionic polymer, or a mixture thereof is preferable.

Examples of the anionic polymer include polyacrylate, isobutylene / maleate, starch / polyacrylate, vinyl alcohol / acrylate, carboxymethylcellulose, and acrylate / acrylamide. , Vinyl acetate / acrylate, polyacrylonitrile, saponified starch / acrylonitrile graft polymer, polysaccharide / acrylate, alginate, polysulfonate, and vinyl acetate / acrylate Polymer-based saponified products are exemplified. One or more of these polymers can be used as a mixture. These are generally powdered or fibrous and may take the form of composite fibers such as polyacrylonitrile inner core / polyacrylate shell.

[0008] Nonionic polymers include polyvinyl alcohol, starch / polyacrylonitrile, polyoxyethylene, vinyl acetate / maleic anhydride, poly-N-vinylacetamide, polyacrylamide, and the like.
A polyvinyl methyl ether type and a vinyl alcohol-acrylate type are mentioned. One or more of these can also be used as a mixture, and generally have a powdery or fibrous product form.

Among the above water-absorbing polymers, polyacrylates, isobutylene / maleate, starch / polyacrylate, polyvinyl alcohol, vinyl acetate / maleic anhydride, poly N-acetamide Systems are preferred. More preferably, from the viewpoints of water absorption, water retention, water permeability, etc., polyacrylates, polyvinyl alcohols, vinyl acetate / maleic anhydride,
An N-acetamide-based water-absorbing polymer is used.

The inorganic peroxide (B) used in the present invention includes sodium percarbonate, sodium perborate and the like, with sodium percarbonate being preferred.

In the present invention, the weight ratio of the components (A) to (C) is (A) / [(B) + (C)] = from the viewpoint of water absorption and sterilization.
It is 3-100, preferably 5-20, particularly preferably 5-15. In addition, from the viewpoint of sterilization performance, the (B) / (C) weight ratio is 0.1.
It is 5 to 10, preferably 1 to 3, and particularly preferably 1 to 2.

The composition serving as the water-absorbing material of the present invention includes:
(D) A thickener can be blended. (D) Examples of the thickener include carboxymethyl cellulose (CMC), ground pulp, thermal mechanical pulp, polyethylene glycol and the like. (D) The thickener is preferably used in a weight ratio of (A) / (D) = 5 to 50, particularly 10 to 30.

The composition to be used as the water-absorbing material of the present invention is appropriately blended with other fungicides, granulating agents, fragrances, deodorants, coloring agents, extenders and the like within a range that does not impair the effects of the present invention. can do.

The water-absorbing material of the present invention comprises the above (A), (B),
It can be produced by stirring and mixing the component (C) and an optional component. The final dosage form is a powder, granule, tablet, sheet or the like.

As a method for treating contaminants with the water-absorbing material of the present invention, powdery substances are directly sprayed on the contaminants,
A method of collecting, a method of putting a powdery water-absorbing material of the present invention in a container and disposing of contaminants therein, a method of combining with a waterproof sheet or the like to form a sheet and wiping off contaminants, a method of absorbing water of the present invention There is a method of disposing a sheet made of a conductive material in a place where it comes into contact with contaminants, such as a floor or a wall of an operating room.

The water-absorbing material of the present invention is suitable for absorbing and disinfecting bacteria-contaminated liquid, such as body fluids, blood, meat juice, vegetable juice, and urine, which are adhered to hard surfaces such as plastic, metal, glass, and tile. It can be used as a water absorbent article. Especially in hospitals, facilities, food factories, kitchens, etc., where there is a strong demand for sterilization and sanitization, bacteria-contaminated liquids (body fluids, blood, urine, meat juices) attached to floors, utensils, walls, desks, worktops, chairs, etc. , Vegetable juice, etc.) and sterilization can be performed at the same time, so that it is useful as a water-absorbent article used in these facilities and the like.

[0017]

According to the present invention, it is possible to obtain a water-absorbing material which can provide a reliable sterilization effect by simple processing, and is excellent in safety and workability.

[0018]

EXAMPLES The components shown in Table 1 were mixed to obtain a powdery water-absorbing material. This water-absorbing material was used in the amount shown in Table 1, and 200 ml of physiological saline containing 10 ⁵ cells / ml of the test bacterium was added (diluted 40-fold with respect to the component (A)), and left to stand for 10 minutes. .
Component (B) and component (C) are the sum of both (weight ratio is shown in Table 1)
Was used so that the final concentration when diluted 40 times with physiological saline was 2500 ppm. The test bacteria were Escherichia co.
li IFO3972, Staphylococcus aureus IFO12732, Bacili
is subtilis ATCC6053.

After standing for 10 minutes, 5 g of the mixture is collected and 45 ml
Add sterile water and shake vigorously.
D Medium Micro Petri Dish (CORNING, 96-Cell Wells)
Was inoculated. After culturing at 30 ° C. for 2 days, the number of bacteria was measured (c.
fu / ml). This test evaluates how much bactericidal activity is obtained when the total concentration of the components (B) and (C) is 2500 ppm. The results are shown in Table 1.

[0020]

[Table 1]

* 1: Crosslinked sodium polyacrylate (manufactured by Kao Corporation) The water absorption ratio in Table 1 was determined by the following method. Water absorbing material
(A) Put into a beaker so that the component weight becomes 1 g, add 200 g of physiological saline and leave it for 5 minutes, then filter the content through a 125 mesh wire net to remove water not absorbed by the component (A). I do. After standing for 5 minutes, the weight of the gelled substance is measured,
The water absorption capacity was calculated by the following equation.

[0022]

(Equation 1)

Continued on the front page (72) Inventor Tadashi Moriyama 1334 Minato, Wakayama-shi, Wakayama Prefecture Kao Corporation Research Institute (72) Inventor Tetsuya Okano 1334 Minato, Wakayama-shi Wakayama Prefecture Research Institute Kao Corporation F-term (reference) 4G066 AA11D AB10D AC17B AE06B AE20D CA43 FA37 4J002 AB012 AB031 AB032 AB041 BE021 BE041 BF021 BG011 BG131 BH021 BL021 BQ001 CH011 CH022 DE216 GB01

Claims (3)

[Claims] 1. A method comprising: (A) a water-absorbing polymer, (B) an inorganic peroxide and (C) tetraacetylethylenediamine, and (A) / [(B)
+ (C)] = 3-100 weight ratio and (B) / (C) = 0.5-10
A water-absorbing material having a bactericidal property, comprising a composition containing the composition in a weight ratio of: 2. The water-absorbing material according to claim 1, wherein (B) the inorganic peroxide is sodium percarbonate. 3. The water-absorbing material according to claim 1, wherein the composition further comprises (D) a thickener.