JPH0515681B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Purpose of the Invention Industrial Field of Application The present invention is intended to prevent dispersed powders from being scattered and drifted away from the intended purpose by the wind, by adding a drift (drift) preventive agent. The present invention relates to the provision of agrochemical powders for use in agricultural chemicals. More specifically, the present invention provides an agrochemical powder in which a mineral powder carrier is supported on an agrochemical active ingredient, by adding an aqueous solution containing pulp waste liquid to the agrochemical powder, thereby reducing the scattering and drifting properties of the powder during dispersion. This invention relates to an agrochemical powder that can be reduced in amount and that does not impair fluidity or dust discharging properties. Conventional technology Pesticide powders are prepared and formulated to have a particle size of 300 mesh or more (45μ or less).
When sprayed, light winds or updrafts may cause the spray to drift to areas other than the intended location, contributing to environmental pollution or causing problems such as phytotoxicity to other useful crops. In addition, if the sprayed powder scatters and drifts away from the intended destination, the amount of the agent falling to the desired location will be reduced.
This may cause a decrease in drug efficacy. In order to prevent this from happening, it is necessary to increase the amount of spraying, resulting in large economic losses. Therefore, efforts are being made to develop technologies to suppress the scattering and drifting of fine particles by adding flocculants to powder agents, and some of them have already been put into practical use. Examples include liquid paraffin or dihydric or trihydric alcohols such as glycerin or diethylene glycol.
Those containing 0.5 to 3.0% (Japanese Patent Publication No. 53-23383 and Japanese Patent Publication No. 55-43035), and those containing 1 to 3% of organic phosphoric acid ester or its salt (Japanese Patent Publication No. 53-23383 and Japanese Patent Publication No. 55-43035).
33660), mineral oils with a certain viscosity, animal and vegetable oils, silicone oils, heavy oils, nonylphenols, alkyl phthalates, alkylene glycols, polyethylene, polypropylene, polybutene, polystyrene, polyvinyl acetate, epoxy resins, butene polymers. , those using alkyl phosphates, sorbitan fatty acid ester derivatives, various surfactants, etc.
No. 155631, Japanese Patent Application Publication No. 157531, Japanese Patent Application Publication No. 1977-
No. 67034, JP-A-54-160735, JP-A-56-59701
No. 1 and JP-A No. 57-67501), dimer acid 1 to 3
% (Japanese Unexamined Patent Publication No. 51-41441), higher alcohols, and higher fatty acids (Unexamined Japanese Patent Publication No. 53-1983).
113029), glycerin ethylene oxide,
Propylene oxide adduct (molecular weight 1000~
10,000) added at 0.5 to 5.0% (JP-A-1983-
141402), alkanolamine acid adduct 0.01
~5.0% added (JP-A-56-86105), 0.2% ester of polyhydric alcohol and monovalent carboxylic acid
There are those that add ~3.0% (Japanese Unexamined Patent Publication No. 130902/1983). Problems to be Solved by the Invention All conventional anti-drift agents involve adding a liquid substance to agglomerate powder particles. Therefore, although their addition achieves the desired anti-drift effect, it also imparts lubricity to the powder, which on the other hand impairs the physical properties required for the powder. In particular, there is a tendency for fluidity to decrease. When the fluidity of the powder decreases, the discharge function from the spreader during spreading becomes poor, and sometimes a situation occurs where spreading becomes impossible. Therefore, as a countermeasure to this problem, it is necessary to add a fluidity imparting agent such as a highly oil-absorbing powder, a fatty acid metal salt, or isopropyl acid phosphate, or to further increase the amount if it has already been added. If such a measure is taken, the cost of the powder agent will be high, making it uneconomical. In addition, addition of fluidity imparting agent or increasing its amount is a flocculant (drift prevention agent).
This will reduce the effectiveness of the powder and increase the scattering and drifting properties of the powder. Therefore, with conventional techniques, it is extremely difficult to satisfy both the characteristics of suppressing scattering and drifting properties and maintaining fluidity. Therefore,
An object of the present invention is to provide an agrochemical powder with particularly suppressed scattering and drifting properties without reducing fluidity. 2 Means for Solving the Constituent Problems of the Invention The present inventors have conducted extensive research in order to solve the above objects. As a result, by adding an aqueous solution containing pulp waste liquid to an agrochemical powder in which an agrochemical active ingredient is supported on a mineral powder carrier,
The present inventors have discovered that it is possible to produce an agrochemical powder with significantly suppressed scattering and drifting properties without impairing fluidity, and have completed the present invention. The pipe waste liquid used in the present invention is an aqueous solution containing thiolignin salt or lignin sulfonate and sugars generated during pulp production. Function The pipe waste liquid used in the present invention serves to prevent the powder from scattering and drifting due to the wind to areas other than the destination of spraying. It is believed that if these additives are added during the production of powders, the particles of the powders will coagulate and the scattering and drifting will be suppressed. In addition, the above additives also suppress a decrease in fluidity due to aggregation. Therefore, the above-mentioned additives are considered to exert the contradictory effects of preventing scattering and drifting and suppressing a decrease in fluidity in a well-balanced manner in order to moderately agglomerate the powder particles. Examples The powder of the present invention may be formulated in accordance with a conventional formulation process for agricultural chemical powder. That is,
The agrochemical active ingredient, the mineral powder carrier, the additive of the present invention, and if desired, auxiliary agents such as stabilizers may be added and mixed and pulverized. In this case, the pulp waste liquid used in the present invention may be an aqueous solution containing about 30 to 60% of sugars, and this aqueous solution may be added to the agricultural chemical powder.
If the amount of this aqueous solution added to the pesticide powder is too small, it will take time to mix it for uniformity, and if it is too large, the fluidity will temporarily deteriorate and it will stick to the equipment, worsening workability. The amount added as a water-soluble component is preferably about 0.5 to 6% of the preparation, and the amount added as a saccharide component is preferably about 0.15 to 3.6%. As the agricultural chemical active ingredient that can be used in the present invention, any active ingredient that is normally used in agricultural chemicals can be used. Moreover, it may contain one type of active ingredient or two or more types of active ingredients. Examples of these active ingredients using common names from the Pesticide Handbook (Japan Plant Protection Association 1981 edition) are as follows. Examples of insecticides MEP, DEP, Marathon, PAP, PMP,
DDVP, diazinon, EPN, EPBP, MPP,
CYAP, CVP, CVMP, Propaphos, ECP,
XMC, MTMC, BPMC, MPMC, MIPC,
Examples of fungicides such as NAC, Kelsen, Cartap, Kasugamycin, Braes, Polyoxin, Validamycin, Fusaride, Thiophanatomethyl, IBP, EDDP, Isoprothiolane, Captan, Difortan, TPN, Zineb, Basic copper chloride, Basic copper sulfate, Iron methanarsonate, triazine, etc. The mineral powder carriers mentioned above include clay, talc, kaolin, silica, bentonite, diatomaceous earth,
Examples include gypsum, calcium carbonate, and sulfur salt. Powders that are widely used in ordinary pesticide powders may be used as they are, but cut clay or DL clay that has been classified to have an average particle size of 20 microns or more by classifying the fine particles of about 10 microns or less contained in these powders may be used. It is also possible to use powdered carriers with reduced drift called . The carriers that can be used in the present invention are not limited to these examples, and if necessary, these carriers may be used by mixing them in any proportion. Further, stabilizers (decomposition inhibitors) for agricultural chemical active ingredients, phytotoxicity reducers, synergists, physical property improvers, etc. may be used in combination, as long as the characteristics of the powder of the present invention are not lost. EXAMPLES Next, Examples will be shown to specifically explain the present invention, but the present invention is not limited to these examples. Example 1 Fusaride 1.6 parts, EDDP 2.1 parts, pulp waste liquid (trade name Sunextract from Sanyo Kokusaku Pulp Co., Ltd.)
P252) (solid content 40%) 3 parts, white carbon
1.5 parts and 91.8 parts of clay are ground in a hammer mill and mixed in a ribbon mixer to obtain the grind of the invention. Example 2 Fusaride 2.6 parts, Validamycin 0.33 parts,
0.5 part of pulp waste liquid (trade name: Sunextract P201, manufactured by Sanyo Kokusaku Pulp Co., Ltd.) (solid content 50%) and 96.57 parts of clay are dispersed and mixed in a blend mill and mixed in a ribbon mixer to obtain the powder agent of the present invention. Example 3 Kasugamycin hydrochloride 0.12 parts, fusaride
1.6 parts, MTMC 2.1 parts, glucose 50% aqueous solution 1
1 part, 2 parts of pulp waste liquid (trade name Sunextract C of Sanyo Kokusaku Pulp Co., Ltd.) (solid content 50%) and 93.18 parts of clay are dispersed and mixed in a blend mill and mixed in a ribbon mixer to obtain the powder of the present invention. . 3. Effects of the invention The above-mentioned additives of the present invention are added to pesticide powders at a concentration of 0.5 to 6.0.
%, it is possible to prevent unintended scattering and drifting due to wind. Therefore, when sprayed, it is ensured that the spray adheres to the target to be controlled (such as the area where pests and diseases occur on crops), and the intended purpose can be effectively achieved. Furthermore, on the other hand, there is a concern that the agglomeration effect may cause a decrease in fluidity, but in the present invention, the decrease in fluidity is hardly a problem. Therefore, there is no need to specifically add fluidity improvers that are widely used in general agricultural chemicals. Next, the specific effects of the improved agrochemical powder of the present invention will be shown using test examples. Test Example Test Powders Powders of the present invention shown in Example 3 with different types and amounts of additives were manufactured and tested. Further, as a control example, a powder without the additive according to the present invention was produced, and as a comparative example, a powder containing 1 part of liquid paraffin, which is a widely used additive at present, was produced in the same manner as the powder in Example 3. I tried it. 1 Floatability test Using a standard powder dispensing machine, 10g of the test powder was vertically
Spray from a height of 1 m into a box with a width of 1 m and a height of 2 m. After leaving it for 5 minutes, the particles floating in the box are poured into an absorption tube containing 75 ml of water at a rate of 30 min. The transmittance of the liquid collected by suction for minutes was measured at a wavelength of 610 mm, and the buoyancy index was calculated using the following formula.
The smaller this value is, the less the scattering and drifting properties are. Floatability index = 100 - Transmittance (%) 2 Fluidity test A vibrator (National Vibrator
EV-17 model) and set it so that the beaker placed on the balance is directly below the sieve so that the powder that falls from the sieve can be weighed. Put 50g of the sample powder into the sieve, start the vibrator, start measuring the time when 10g of powder falls, and end when 20g of powder falls (30g from the start of falling). The time required to drop 20g was defined as fluidity (expressed in seconds). The shorter the number of seconds, the better the fluidity. 3. Dispersion Distance Test A ventilation fan with a diameter of 30 cm was installed on one side of a wooden building 4 m wide and 30 m long, and 100 g of the test powder was dispersed from the other side using a midget duster while exhausting the air inside the building. After 10 minutes of spraying, the powder that had fallen onto a 5 cm x 10 cm black adhesive paper that had been placed at 3 m intervals from the spraying point was observed with the naked eye, and the scattering distance from the adhesive paper spraying point where no powder was observed was taken as the scattering distance. The longer the scattering distance (m), the greater the scattering drifting property. These results are shown in Table 1. Note that the amount added (%) in the table indicates the amount added of the additive (aqueous solution). 【table】

Claims (1)

[Claims] 1. An improved agrochemical powder comprising an agrochemical active ingredient supported on a mineral powder carrier, characterized in that an aqueous solution containing pulp waste liquid is added thereto.