JPH11139906A - Antimicrobial agent for tablewares and the like and antimicrobial composition for tablewares and the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antimicrobial agent for tablewares and the like which is harmless to the human body and can carry out an effective antimicrobial treatment by the facile operation such as atomization and the like, and an antimicrobial composition for tablewares and the like containing the antimicrobial agent. SOLUTION: The antimicrobial agent for tablewares and cooking utensils is composed of a diglycerol monofatty acid ester containing the monofatty acid ester in the purity of 50 wt.% or more. The carbon number of the fatty acid in the diglycerol monofatty acid ester is in the range from 8 to 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial agent for tableware and cooking utensils, which is harmless to the human body and which can be effectively subjected to an antibacterial treatment by a simple operation such as spraying. The present invention relates to an antibacterial composition for dishes and the like contained therein.

[0002]

2. Description of the Related Art In the production of food, alcohol, chlorine-based, and oxygen-based chemicals are conventionally used for antibacterial treatment of tableware and cooking utensils, and disinfection of cook's hands and refrigerators. .

[0003] Alcohols such as ethanol, methanol, and isopropanol are said to have poor antibacterial effects when sprayed only on dishes and the like. To demonstrate the antibacterial effect,
It is necessary to perform treatment with a concentrated solution such as immersion treatment.

[0004] Oxygen-based drugs are suitable for bleaching tableware and the like, but have a low antibacterial effect. Chlorine drugs such as sodium hypochlorite have some antibacterial effects when sprayed, but have the problem of leaving an odor.

[0005] That is, Escherichia coli, Staphylococcus aureus, B. enteritidis, etc., which are problematic in food hygiene, can be effectively subjected to antibacterial treatment by a simple operation such as spraying and wiping, and no odor is generated.
At present, there is no antibacterial agent that does not adversely affect the human body.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide an antibacterial agent for tableware and the like which overcomes the above-mentioned problems of the prior art and has no adverse effect on the human body.

[0007]

The above objects of the present invention are as follows. 1. An antibacterial agent for tableware, cooking utensils, etc., which is a diglycerin monofatty acid ester having a monofatty acid ester purity of 50% by weight or more; The fatty acid carbon number of the diglycerin monofatty acid ester is in the range of 8 to 18.
2. the antibacterial agent for tableware and the like described in the description; 3. An antibacterial agent composition for dishes and the like, comprising the diglycerin monofatty acid ester according to claim 1 or 2. The antibacterial agent composition for dishes and the like according to claim 3, comprising at least one of a sterilizing agent, a bactericide, a preservative, and an antibacterial agent.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The purity of the monofatty acid ester according to the present invention is 5
An antibacterial agent comprising a diglycerin monofatty acid ester of 0% by weight or more has never been used as a disinfectant for tableware and the like, and its suitability has not been known at all.

[0010] The polyglycerin fatty acid ester containing the product of the present invention is a safe compound as a food additive, to which no restrictions are imposed on the food used and the amount used. Among these compounds, it is known that glycerin monofatty acid ester, triglycerin fatty acid ester, hexaglycerin fatty acid ester, and decaglycerin fatty acid ester have antibacterial properties (Antimicrobial A).
gents and Chemotherapy, No
v. 1973, p. 501-506).

However, the antibacterial properties of the diglycerin monofatty acid ester used in the present invention have not been known.

The diglycerin monofatty acid ester used in the present invention contains the monofatty acid ester in an amount of 50% by weight or more. In general, diglycerin monofatty acid ester is obtained by reacting diglycerin and a fatty acid without a catalyst or in the presence of a catalyst.
It is obtained by heating and mixing at 80 to 240 ° C. The esterification reaction proceeds according to a nondiscriminatory distribution, and the diester, the triester, and the tetraester are present as reaction products in addition to unreacted diglycerin and diglycerin monofatty acid ester. The proportion of these is determined by the reaction molar ratio of diglycerin and fatty acid. Specifically, when diglycerin and palmitic acid are mixed and reacted until there is no unreacted fatty acid, the reaction products are almost as shown in the following table.

[0013]

[Table 1]

The monoester content of the reaction product of diglycerin and fatty acid does not exceed 50% by weight even if the reaction molar ratio is changed.

The diglycerin monofatty acid ester containing 50% by weight or more of the monofatty acid ester used in the present invention can be obtained by a method for removing unreacted diglycerin from an ordinary reaction product (however, in this method, the content of the monofatty acid ester is reduced). The maximum is only 55% by weight), a method of fractionating a solvent, a method of molecular distillation, and the like.
Known techniques can be employed for the unreacted substance removal method, solvent fractionation method, and molecular distillation method.

The diglycerin monofatty acid ester containing 50% by weight or more of the monofatty acid ester used in the present invention preferably has 8 to 18 fatty acid carbon atoms. Diglycerin monoester having a fatty acid carbon number of less than 8 causes generation of unpleasant odor and increased skin irritation. In addition, diglycerin monoester having a fatty acid carbon number of more than 18 has poor or no antibacterial properties.

The diglycerin monofatty acid ester used in the present invention is a liquid or semi-solid compound at room temperature, is colorless and odorless, and has very little or no irritation to the skin.

The antibacterial liquid composition of the present invention contains the diglycerin monofatty acid ester of the present invention. In addition to this, alcohols such as ethyl alcohol, methyl alcohol, glycerin, propylene glycol and ethylene glycol or water. And other known bactericides, sterilizers and preservatives (eg, glycerin fatty acid esters, sorbic acid, dehydroacetic acid, etc.), natural extracts having antibacterial properties, and the like. Thereby, enhancement of the antibacterial effect and persistence of the antibacterial effect are recognized.

[0019]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited to these examples.

Antibacterial properties were evaluated using the diglycerin monofatty acid ester of the present invention shown in Table 2 and Comparative Examples.

[0021]

[Table 2]

Example 1 Each of the above-mentioned present invention product and the comparative product was 10,000, 5,000,
A test medium (composition; Table 3) prepared so as to have a concentration of 1,000, 500, 100, 50, and 0 ppm was inoculated with 0.2 ml of the inoculum, and the surface was smeared. Static culture for 3-6 days under the optimal culture conditions of
It was observed whether various test bacteria such as bacteria, yeast, and mold could grow against various concentrations of antibacterial agents.

However, the tests were performed on the following three strains of bacteria and three strains of yeast.
The test was performed on a total of 9 strains of 3 strains and 3 molds, and the inoculated bacterial solution was a solution obtained by diluting each test strain inoculated with one loopful of platinum into 5 ml of 0.85% physiological saline.

(1) Bacteria Sample No. 1: Escherichia coli 2: Staphlococcus aureus 3: Bacillus subtilus (2) Yeast Sample No. 1: Saccharomyces cerev
ishiae 2: Candida ultilus 3: Debaromyces hansenil (3) Mold Test sample No. 1: Aspergillus niger 2: Penicillium chrysogenum 3: As shown in Table 3, the composition of Bysochlamys medium is as follows.

[0025]

[Table 3]

Tables 4 to 9 show the growth test results.

[0027]

[Table 4]

[0028]

[Table 5]

[0029]

[Table 6]

[0030]

[Table 7]

[0031]

[Table 8]

[0032]

[Table 9]

According to the above test results, 50 to 10 bacteria were observed.
It can be seen that the antibacterial effect is 0 ppm, 50 to 500 ppm for yeast, and 100 to 500 ppm for mold. In general, it has an antibacterial property equal to or higher than that of diglycerin monocaprylate (comparative product 2) whose antibacterial performance is known.

At 100 ppm or more, the growth of bacteria can be completely inhibited, and at 500 ppm or more, the growth of yeast and mold can be completely inhibited.

Example 2 An antibacterial solution for testing was prepared by mixing 30% by weight of an antibacterial agent solution prepared by diluting each antibacterial agent at 1000 ppm in distilled water with 70% by weight of a modified methanol solution.

After culturing two kinds of test strains of E. coli and S. aureus for 24 hours in the above-mentioned medium for bacteria, one loop of platinum was suspended in 0.85% physiological saline, and the suspension was cultured. 10 ⁶
It was prepared by diluting to a concentration of cells / ml.

0.5 ml of this bacterial solution was dropped on a 10 cm square plastic cutting board, applied to the entire surface and allowed to stand for 10 minutes. Then, a test antibacterial solution prepared by adding a prepared alcohol was sprayed from a distance of 30 cm for 2 seconds. After 1 minute, 3 minutes, 5 minutes, and 10 minutes, the remaining viable cells were counted by wiping with gauze and washing out with 10 ml of sterile physiological saline as a test solution.

For comparison, the number of viable cells remaining after a predetermined time without spraying the antibacterial liquid was also measured.

The number of remaining viable cells was measured according to the Food Sanitation Inspection Guidelines.

The results are shown in Table 10.

[0041]

[Table 10]

The product of the present invention was found to kill both Escherichia coli and Staphylococcus aureus after a sensitization time of 1 minute or more.

Example 3 Table 4 shows the antibacterial composition according to the present invention obtained by adding the same amount of glycerin fatty acid ester, sorbic acid or dehydroacetic acid to the inventive products 1 to 4 (500 ppm) of Example 1.
When the antibacterial tests shown in Tables 7 to 7 were performed, the same or better effects were observed.

[0044]

Industrial Applicability The diglycerin monofatty acid ester of the present invention is a food additive and is harmless to humans without any safety problems.
Since it has an excellent antibacterial effect against yeasts and molds, it is effective as an antibacterial agent for utensils and equipment such as tableware, cooking utensils and kitchen appliances. Further, as shown in Example 2, an effective antibacterial effect can be obtained by a simple operation such as a spraying operation of an antibacterial agent.

Claims (4)

[Claims] An antibacterial agent for tableware, cooking utensils, etc.,
An antibacterial agent for tableware and the like, which is a diglycerin monofatty acid ester having a monofatty acid ester purity of 50% by weight or more. 2. The antibacterial agent for dishes and the like according to claim 1, wherein the diglycerin monofatty acid ester has a fatty acid carbon number in the range of 8 to 18. 3. An antibacterial composition for tableware and the like, comprising the diglycerin monofatty acid ester according to claim 1 or 2. 4. The antibacterial composition for tableware and the like according to claim 3, further comprising at least one of a sterilizing agent, a bactericide, a preservative, and an antibacterial agent.