JP2815327B2 - Industrial fungicide composition - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active ingredient comprising a combination of two compounds, which exhibits a high bactericidal effect by the synergistic action of both, especially paper pulp production. The present invention relates to a novel industrial fungicide composition suitably used for industrial water systems. 2. Description of the Related Art Conventionally, wastewater from a papermaking process in the pulp and paper manufacturing industry, various water systems such as circulating cooling water in various industrial fields, or water-based paints made using industrial water, paper coatings, etc. In liquids, latex, printing paste, leather, and the like, harmful microorganisms are liable to multiply and propagate, which causes a decrease in productivity and quality. [0003] In particular, in the water system in the pulp and paper manufacturing industry, slime is generated by the proliferation of bacteria, filamentous fungi, and yeasts, and the pulp slurry flows in water channels, particularly in places where the slurry comes into contact with rough walls, chests and flow boxes. Slime adheres and forms in transport pipes and other places where pulp slurry flows at a low flow rate, and this slime often detaches, causing paper breakage and contamination of pulp and paper products, as well as propagation of microorganisms. It causes various obstacles. Such failures occur,
The use of a high-speed machine is a particular problem, resulting in a significant decrease in productivity and economic loss. [0004] In addition, also in the circulating water system for cooling metal working oils, microorganisms multiply and inhibit the cooling performance and emulsifying properties of the processing oils, and the odor is generated, deteriorating the working environment and increasing public health. This is causing undesirable phenomena. Other obstacles due to the propagation of harmful microorganisms are:
It is also found in industrial products such as aqueous coatings for paper, polymer latex, pulp for papermaking, glue, leather, and metalworking oils. By the way, as an agent for suppressing or controlling the generation of harmful microorganisms in the water system or the industrial product, so far, organometallic compounds, organochlorine compounds,
Organic sulfur compounds, quaternary ammonium salt compounds, etc. have been used, but these compounds are toxic to the human body, emit bad odors and off-flavors, and undesired phenomena such as foaming in the water system used. Is generated. [0006] Furthermore, when these control agent-containing water systems are discharged into a general river or sea, they have an adverse effect on fish and shellfish and cause environmental conservation problems. [0007] As an improvement over these drawbacks, there has been proposed, for example, 2,2-dibromo-3-nitrilopropionamide (Japanese Patent Publication No. 42-10386).
Nitropropane-1,3-diol (JP-B-40-89)
No. 17), tetrafluoroisophthalonitrile (Japanese Patent Publication No. 41-11358), 2,2-dibromo-3
-Nitrilopropionamide or a combination of 2-bromo-2-nitropropane-1,3-diol and tetrafluoroisophthalonitrile (JP-A-62-16401), 2,2-dibromo-2-cyanoacetamide or An industrial fungicide containing a combination of 2-bromo-2-nitropropane-1,3-diol and a tetrahalogenated isophthalonitrile (JP-A-62-402) has been proposed. The types of harmful microorganisms to be sterilized or prevented are limited, and their efficacy is insufficient and not always satisfactory. SUMMARY OF THE INVENTION The present invention overcomes the above-mentioned drawbacks of the conventional industrial germicides and has a wide range of harmful microorganisms regardless of the type of fungi, bacteria, yeasts and the like. On the other hand, the present invention has been made for the purpose of providing an industrial disinfectant composition having a high disinfection and antibacterial effect. The present inventors have conducted intensive studies to overcome the above-mentioned drawbacks of the conventional industrial germicides, and as a result, have found that certain types of halogenated aliphatic nitro It has been found that the object can be achieved by including, as an active ingredient, a combination of alcohol and a certain kind of 2,4,5,6-tetrahalogenoisophthalonitrile at a predetermined ratio. The present invention has been made. That is, the present invention relates to 2,2-dibromo-
Disclosed is an industrial fungicide composition comprising 2-nitroethanol and 5-chloro-2,4,6-trifluoroisophthalonitrile in a weight ratio of 1:10 to 10: 1. Things. The 2,2-dibromo-2-nitroethanol and 5-chloro-2 used as components of the present invention
4,6-Trifluoroisophthalonitrile has insufficient bactericidal effects, such as being limited to certain types of microorganisms, and lacks sustained effects, and should be sufficiently satisfactory as a bactericide. However, when both are used in combination, they exert an extremely excellent bactericidal action that can not be expected from each component, and are effective against harmful microorganisms such as filamentous fungi, bacteria, yeasts and the like. Has a wide range of applications, regardless of type. DETAILED DESCRIPTION OF THE INVENTION The active ingredients of the industrial disinfectant composition of the present invention are 2,2-dibromo-2-nitroethanol and 5-chloro-2,4,6-trifluoroisophthalonitrile. The compounding ratio of the two is selected within the range of 1:10 to 10: 1, preferably 1: 5 to 5: 1 by weight of the former and the latter. The bactericide composition of the present invention is basically prepared by uniformly mixing the above-mentioned two compounds at a predetermined ratio, but is generally an aqueous solution, a solvent solution, an emulsified dispersion. Available in the form of Solvents that can be used at this time include, for example, alcohol solvents, ketone solvents, ether solvents, and hydrocarbon solvents. The amount of the industrial fungicide composition of the present invention to be added to an aqueous system varies depending on the concentration of microorganisms.
100 ppm, and 1 to 500 ppm in the fields of water-based paint, glue, leather and the like. And even with such a small amount of addition, a sufficiently good bactericidal effect can be obtained. The industrial germicidal composition of the present invention may contain additives commonly used for industrial germicides, such as stabilizers and surfactants, if desired. The present invention will be described in more detail with reference to examples and comparative examples. Example 2 10 parts by weight of 2,2-dibromo-2-nitroethanol
5 parts by weight of 5-chloro-2,4,6-trifluoroisophthalonitrile, 83 parts by weight of diethylene glycol monomethyl ether and 2 parts by weight of Solpol 900A (a stabilizer manufactured by Toho Chemical Co., Ltd.) are mixed, uniformly dispersed, and sterilized for industrial use. An agent composition was prepared. Comparative Example 1 An industrial fungicide was prepared by mixing and dissolving 15 parts by weight of 2,2-dibromo-2-nitroethanol and 85 parts by weight of diethylene glycol monomethyl ether. Comparative Example 2 15 parts by weight of 5-chloro-2,4,6-trifluoroisophthalonitrile, 83 parts by weight of diethylene glycol monomethyl ether and 2 parts by weight of Solpol 900A (a stabilizer manufactured by Toho Chemical Co., Ltd.) were mixed and uniformly mixed. This was dispersed to prepare an industrial fungicide. Test Example 1 Using the industrial germicides obtained in Examples and Comparative Examples, a test for preventing bacterial growth and a test for preventing slime from occurring in the wastewater after the papermaking process were performed as follows. In the paper making process of a paper mill, the industrial disinfectant obtained in each of the Examples and Comparative Examples was added to a white water pit for 2 hours and 3 times a day for 7 days so that the water concentration was 20 ppm, The number of microorganisms in the white water was measured. The test method is to dilute a white water sample with sterile water,
This fixed amount was taken in a petri dish, and a dissolved waxman agar medium was injected, mixed, and solidified in a plate shape. Microbial colonies generated after culturing in an incubator (32 ° C.) for 2 days were measured with a colony counter. The number of paper breaks during papermaking was also measured to confirm the bactericidal effect. Table 1 shows the results. [Table 1] From the results shown in this table, it can be seen that the industrial disinfectant of the present invention has excellent antibacterial growth inhibitory action and slime generation inhibitory action on wastewater from a paper mill. Test Example 2 Using the industrial germicides obtained in the examples and comparative examples, a test for preventing bacterial growth was performed on a coating solution for papermaking as follows. A broth liquid medium and a pre-rotted coating solution are added to a starch-based coating solution having a pH of 10.0, and the mixture is stirred.
An industrial germicide adjusted to a ppm concentration was added. After this was stored in a thermostat at 32 ° C. for 5 days, the number of viable bacteria in each coating solution was measured. Table 2 shows the results. [Table 2] From the results shown in this table, it can be seen that the industrial disinfectant of the present invention has an excellent antibacterial action on paper coating solutions. The industrial germicidal composition of the present invention contains an active ingredient in which two compounds are combined, exhibits a broad antibacterial spectrum due to a synergistic effect of the two, and has unexpectedly excellent properties. It has an effect of preventing the growth of microorganisms.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shigeru Kurose 3-6-1, Honari, Misato-shi, Saitama (56) References JP-A-62-402 (JP, A) JP-A-60-231603 (JP) , A) JP 42-21510 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01N 37/34 A01N 33/20

Claims (1)

(57) [Claims] 1.2,2-Dibromo-2-nitroethanol and 5-chloro-2,4,6-trifluoroisophthalonitrile in a weight ratio of 1:10 to 10: 1 An industrial fungicide composition characterized by containing: