JPH01102004A - Industrial germicide - Google Patents

Abstract

PURPOSE:To obtain an industrial germicide, containing a dibromoalcohol compound and 3,3,4,4-tetrachlorotetrahydrothiophene-1,1-dioxide, suitable for sterilizing water systems for producing paper pulp and having synergistically improved effects. CONSTITUTION:An industrial germicide, containing a compound expressed by the formula (R is H, alkyl, etc.) and 3,3,4,4-tetrachlorotetrahydrothiophene-1,1- dioxide at 1:5-5:1 weight ratio. This germicide is capable of exhibiting excellent germicidal effects which cannot be predicted at all for constituent individual ingredients and having a wide application range regardless of the kinds of molds, bacteria, yeasts, etc., which are noxious microorganisms. The afore- mentioned germicide is used in the form, such as aqueous solution, solvent solution or emulsified dispersion. The amount thereof added in use is 0.01-100ppm in the case of water systems for producing paper pulp, and 1-500ppm for water-color coatings, pastes, leathers, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a dibromonitroalcohol compound represented by general formula (1) and 3.3.4.4-tetrachlorotetrahydrothiophene L1. t-dioxide [hereinafter abbreviated as compound (n)]. ] and which utilizes the synergistic bactericidal effect of both compounds. The present industrial disinfectant is suitably used in industrial water systems related to paper pulp production.

(Prior art and problems) Conventionally, wastewater from the papermaking process in the pulp and paper industry,
It is harmful to various water systems such as circulating cooling water in various industrial fields, as well as water-based paints, paper coating fluids, latex, printing pastes, leather, etc. that are made using industrial water. microorganisms are likely to multiply, which causes a decline in productivity and quality.

In particular, in water systems in the pulp and paper industry, slime has recently been generated due to the proliferation of filamentous fungi and yeasts, and slime has been generated in waterways where pulp slurry flows, especially in areas with rough walls that come in contact with slurry, chests, flow boxes, transport pipes, etc. In other places where the flow rate of the pulp slurry is low and stagnates, slime is formed. This slime often detaches, causing paper scraps and contamination of Gi pulp products, as well as causing various problems due to the growth of microorganisms.

The occurrence of such failures becomes a particularly serious problem when high-speed machines are used, resulting in a significant decrease in productivity and economic loss.

Furthermore, in the circulating water system for cooling metal processing fluids, microorganisms multiply and multiply, impairing the cooling performance and emulsifying properties of processing fluids, and producing bad odors, deteriorating the working environment, which is an undesirable phenomenon in terms of public health. I'm grinding it.

Other problems caused by the growth of harmful microorganisms occur in industrial products such as water-based paints, paper coatings, polymer latex, paper pulp, glues, leather, and metalworking fluids.

By the way, as agents for suppressing or controlling the occurrence of harmful microorganisms in the water system or industrial products, for example, organic chlorine compounds, organic chlorine compounds, organic sulfur compounds, quaternary ammonium Salt compounds and the like have been used, but these compounds are toxic to the human body, emit foul odors and foreign odors, and even cause undesirable phenomena such as foaming. In addition, when these pesticide-containing water systems are used in rivers or the sea, they have a negative impact on fish and shellfish, causing problems in terms of environmental conservation.

(Object, structure, and effect of the invention) The present inventors have completed the present invention as a result of extensive research in order to eliminate the above-mentioned drawbacks of antibacterial agents.

That is, the present invention is the following industrial disinfectant.

general formula % formula % (1) (In the formula, R represents a hydrogen atom or a substitutable argyl group.

) and a dibromonitroalcohol compound represented by 3
,3.4.4-tetrachlorotetrahydrothiophene-
An industrial disinfectant characterized by containing 1,1-dioxide.

The compound represented by the general formula (1) is
Compound (II) is a fungicide described in US Pat. No. 2,957,887.

Each of these disinfectants has insufficient bactericidal effects, such as being limited to certain types of microorganisms, and lacks long-lasting effects, so they are still unsatisfactory as industrial disinfectants.

The industrial fungicide of the present invention exhibits an extremely excellent bactericidal effect that cannot be expected from the individual constituent components, and is effective against harmful microorganisms such as filamentous fungi, bacteria, and yeast, regardless of their types. Has a wide range of application.

Examples of the compound represented by the general formula (1) in the present invention include 2,2-dibromo-2-nitroethanol, 2.2-dibromo-2-nitroethanol,
-dibromo-2-nitro-1-methylethanol and the like. These compounds are not limited to only one type when blended, and two types of compounds may be used in combination.

The blending ratio (weight) of the compound represented by formula (1) and compound (II) is (1:10) to (10:1), preferably (1:5) to (5:1).

If either one of them is too small, a satisfactory effect cannot be obtained.

The industrial disinfectant of the present invention is basically prepared by uniformly mixing the two components described above, but in terms of -C, it can be used as an aqueous solution, a solvent solution, an emulsified dispersion, or the like.

Examples of solvents that can be used here include alcohol solvents, ketone solvents, ether solvents, and hydrocarbon solvents. Further, the industrial disinfectant of the present invention may be used by being supported on any carrier, and there are no particular restrictions on the mode of use, and various methods can be adopted.

When using this industrial disinfectant, the amount added varies depending on the concentration of microorganisms, but it is 0.01 to 1100 pp for water systems in fields such as boat fishing and pulp industry, and 0.01 to 1100 pp for water-based paint, glue, leather, etc. In the field of 1 to 500 ppm, a good bactericidal effect can be obtained at this level.

There is no problem in adding stabilizers, surfactants, etc. to the industrial disinfectant of the present invention as long as they do not impede the purpose of the present invention.

(Examples and Comparative Examples) Industrial fungicides were prepared according to the following formulation. All parts in the examples indicate parts by weight.

Example 1 2.2-Dibromo-2-nitro-1-methylethanol 10 parts Compound (n) 10 parts Diethylene glycol monomethyl ether 75 parts Trupol 900
A (manufactured by Toho Chemical Co., Ltd.) 5 parts Example 2 2.2-dibromo-2-nitroethanol 10 parts Compound (If) 10 parts Diethylene glycol monomethyl ether 75 parts Trupol 90
0A, 5 parts Comparative Example 1 Compound (n) 20 parts Diethylene glycol monomethyl ether 75 parts Tsurpol 900A 5 parts Comparative Example 2 2.2-dibromo-2-nitroethanol 20 parts Diethylene glycol monomethyl ether 80 parts Comparative Example 3 2.2-dibromo -2-nitrol-methylethanol 20 parts Diethyne reglycol monomethyl ether 80 parts (Efficacy test) The industrial fungicides prepared in Examples 1 to 2 and Comparative Examples 1 to 3 above were tested by the following method. , the slime generation prevention effect and antiseptic effect were investigated.

Test Example 1 [Bacterial growth prevention and slime generation prevention test in wastewater after papermaking process] In the papermaking process of a certain papermaking factory, the industrial fungicides prepared in Examples 1 to 2 and Comparative Examples 1 to 3 above were added to white water bit. The concentration of microorganisms in the white water was measured by adding it three times a day for 2 hours so that the concentration in the water was 20 ppm for 7 days.

The test method involved diluting a white water sample with sterilized water, taking a quantitative amount of this in a Petri dish, and pouring dissolved Waxman agar medium into it, mixing it, and solidifying it into a flat plate.

After culturing in a thermostatic chamber (32° C.) for 2 days, microbial colonies generated were measured using a colony counter. The number of paper breaks during papermaking was also measured to confirm the bactericidal effect.

From the results shown in Table 1 above, it can be seen that the industrial fungicides of the present invention (Examples 1 and 2) have an excellent effect of inhibiting bacterial growth.

Test Example 2 [Bacterial growth prevention test in papermaking coating fluid] pn 10.
The bouillon liquid medium and the pre-rotted coating solution were added to the starch-based coating solution of O, and the mixture was stirred, and the fungicide prepared above was added to give a concentration of 300 pp+m trA degrees.

After storing this in a thermostat at 32° C. for 5 days, the number of viable bacteria in each coating solution was measured. The results are shown in Table 2 below.

Table 2

Claims (1)

[Claims] A dibromonitroalcohol compound represented by the general formula ▲ Numerical formula, chemical formula, table, etc. ▼ (I) (wherein, R represents a hydrogen atom or a substitutable alkyl group);
,3,4,4-tetrachlorotetrahydrothiophene-
An industrial disinfectant characterized by containing 1,1-dioxide.