JP2000026222A - Composition for bordeaux mixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition of higher concentrations, storable over a long period, and affording a homogeneous Bordeaux mixture with small particle size and stable quality by merely diluting the composition with water. SOLUTION: This composition is a reaction product formed from calcium hydroxide powder <=7.5 μm in average particle size and >=20 m2/g in specific surface area or its mixture with water and an aqueous solution of copper sulfate, being characterized by a slurry or wet powdery form with the total concentration of Ca(OH)2 and CwSO4.5H2O at >=25 wt.% on a solid basis.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slurry-like or wet-powder-like composition for a bordeaux liquid capable of obtaining a uniform, stable bordeaux liquid having a fine particle size only by dilution with water.

[0002]

2. Description of the Related Art Bordeaux liquor has long been used as a pesticide for disinfecting various agricultural crops such as apples, grapes, citrus fruits, peaches and other fruit trees. Bordeaux solution is not only inexpensive, but also has a residual effect for the purpose of avoiding organic pesticides containing chemicals (environmental hormones) suspected of having endocrine disrupting effects, which has recently become a problem. It has been reviewed again in terms of environmental friendliness as described above, without being obliged for the purpose of reducing pesticides to reduce the number of applications using long characteristics.

[0003] The Bordeaux solution is usually prepared by dissolving slaked lime in water by wet digestion in which quicklime is reacted with water in water, and then cooling the slaked lime suspension, which has been heated to a high temperature by the heat of reaction, is cooled. In addition, a diluted aqueous solution of copper sulfate prepared by separately dissolving copper sulfate in water is gradually added to a suspension of slaked lime water, which is appropriately diluted by adding water, with stirring at a temperature near room temperature. ing.

However, the operation of preparing the above-mentioned Bordeaux solution requires a great deal of labor and labor for digesting quick lime, cooling it, dissolving copper sulfate and mixing the same, and also requires a quick lime digestion method and slaked lime water. The concentration of the suspension and the aqueous copper sulfate solution,
Due to the reaction conditions such as temperature, the quality of the Bordeaux solution to be produced varies, and the fine particles have good suspendability in water.
To prepare a Bordeaux solution of a certain quality requires skill and labor. Furthermore, the bordeaux solution thus obtained cannot be prepared and must be used as soon as possible. This is because, over time, particles grow or agglomerate and the particle size increases, the suspension in water deteriorates, the adhesion to crops during spraying worsens, or the sedimentation in This causes a change or causes clogging of the nozzle of the sprayer, so that uniform and effective spraying cannot be performed. In addition, a high-concentration Bordeaux solution is prepared in advance, and a Bordeaux solution having a predetermined concentration is obtained by adding and diluting water later,
The particle size is large, the suspension property in water is poor, and the same result as above is obtained.

[0005] Further, as a slaked lime suspension, it is necessary to use one obtained by subjecting quicklime to wet digestion using water three times or more by weight and further diluting it with water as appropriate. Even if a suspension obtained by suspending dry digested slaked lime powder in water is used, the particle size of the obtained Bordeaux solution will be large, and thus the same result as described above will be produced.

In order to solve these problems, the inventors of the present invention disclosed, for example, in Japanese Unexamined Patent Publication No. Hei 2-279611, a wet-type bordeaux solution obtained by mixing copper sulfate and quicklime or slaked lime. A method for preparing a Bordeaux liquid characterized by pulverization by a pulverizer has already been proposed.

Further, in order to obtain a uniform Bordeaux solution having a fine particle diameter, Japanese Patent Application Laid-Open No. 2-279610 discloses a homopolymer or copolymer of a carboxyl group-containing vinyl compound, a carboxyl group-containing vinyl compound and another vinyl compound. And a dispersant for a Bordeaux solution containing a copolymer of the above or a salt of these polymers as an active ingredient. Further, JP-A-2-279612 discloses a dispersant for bordeaux liquid containing naphthalenesulfonic acid, alkylnaphthalenesulfonic acid or a salt of any of these formalin condensates as an active ingredient. In Japanese Patent Application Laid-Open No. 4-198102, the following general formula (a) is used.

Embedded image (Wherein, R ¹ is a hydrogen atom or a methyl group, R ² is an alkyl group, an alkenyl group, or an alkylphenyl group having 1 to 30 carbon atoms, m is 2 to 4, and n is 1 to 50). Discloses a dispersant for a Bordeaux liquid, comprising a polymer of Further, in Japanese Patent Application Laid-Open No. 4-198103,
Dispersants for Bordeaux liquids comprising alkylene oxide adducts of polyamines are disclosed.

[0008]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Laid-Open No. 2-279 is described.
The bordeaux solution prepared by the method disclosed in Japanese Patent Application Publication No. 611 has a fine particle size, homogenous and stable in quality only by dilution with water, and is stored for a long time after preparation as a high-concentration slurry. It is possible. However, the method for preparing a Bordeaux solution disclosed in this publication requires that quick lime (or slaked lime) and an aqueous solution of copper sulfate be mixed and then wet-pulverized. In this wet-pulverization treatment, quick lime (or slaked lime) and sulfuric acid are mixed. It is necessary that the mixture of the copper aqueous solution has fluidity that can be transported by a pump or the like, and therefore, it is necessary that the viscosity be equal to or less than a certain value, and therefore, a high concentration form such as a wet powder is used. I couldn't do that.

Therefore, Japanese Patent Application Laid-Open No. Hei 2-279610,
JP-A-2-279612, JP-A-4-19810
No. 2 and JP-A-4-198103, when a dispersant is used for preparing a composition for a Bordeaux solution, the viscosity of the composition can be reduced.
While preventing the growth of fine particles in the composition for Bordeaux solution at the same time as it is possible to achieve a higher concentration, in order to spray the Bordeaux solution, the dispersant is dispersed in the fine particles after diluting the composition with water, Due to the structural properties of the dispersant molecules, steric secondary aggregates can be created to improve the susceptibility of the Bordeaux liquid particles, thereby increasing the concentration at higher concentrations.
A higher quality composition for a slurry-like Bordeaux liquid could be provided.

However, although the disadvantages of the conventional Bordeaux solution can be solved by using the dispersant described in the above-mentioned publication, the wet pulverization step cannot be omitted, so that the above-mentioned problems associated with pump transportation are not achieved. Has not been resolved.

Accordingly, an object of the present invention is to provide a higher concentration,
It is an object of the present invention to provide a bordeaux liquid composition which can be stored for a long period of time, has a fine particle size only by being diluted with water, and is a homogeneous and stable bordeaux liquid.

[0012]

That is, the present invention relates to a reaction product of a mixture of slaked lime powder or water having an average particle diameter of 7.5 μm or less and a specific surface area of 20 m ² / g or more, and an aqueous copper sulfate solution. a is, Ca _{(OH) 2} and CuSO ₄ · 5H
_The present invention relates to a composition for a Bordeaux liquid, which is in the form of a slurry or a wet powder having a total concentration of solids of 2O of 25% by weight or more.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The bordeaux liquid is composed of bordeaux liquid particles composed of a reaction product of a slaked lime aqueous suspension and an aqueous solution of copper sulfate as described above. It is a high-concentration form that can provide a Bordeaux solution by diluting with water. Its characteristics are as a slaked lime raw material, with an average particle size of 7.5 μm or less,
It is to use a powder of slaked lime having a specific surface area of 20 m ² / g or more (hereinafter referred to as “fine slaked lime”) or a mixture with water. Here, the average particle diameter of slaked lime is 7.5 μ
m or less, the specific surface area is less than 20 m ² / g, or even if the specific surface area is 20 m ² / g or more, if the average particle diameter exceeds 7.5 μm, the composition for bordeaux liquid It is not preferable to increase the particle diameter of the Bordeaux liquid in the product and to dilute it with water at the time of use, because the suspension in water deteriorates.

The mixture of the fine slaked lime powder and water is described in Inorganic Materials Magazine (edited by the Society of Inorganic Materials).
Vol. 2, No. 258, 358-364 (199
5) and JP-A Nos. 9-110019 and 9-1036.
Nos. 40, 9-110423 and 9-110
424, 9-165216, 9-24
Nos. 9415, 9-278434, 9-2
Nos. 78433, 9-278499, and 10
No. -25112, alcohols (monohydric alcohols such as methanol and ethanol,
Dihydric alcohols such as ethylene glycol, diethylene glycol and propylene glycol, trihydric alcohols such as glycerin, etc.); amines such as monoethanolamine, diethanolamine and triethanolamine;
Oxycarboxylic acids such as citric acid, tartaric acid and gluconic acid and salts thereof; sucrose, glucose sugar; succinate;
Lignin sulfonate: It is obtained by digesting quicklime with an aqueous solution to which an acetate has been added to dry powder or digesting so that a small amount of water to a slurry-like water remains, and then drying if necessary.

The composition for a Bordeaux solution of the present invention is prepared by adding the above-mentioned powder of fine slaked lime or a mixture with water to a temperature of 80 ° C. or less.
Preferably, it can be produced by adding and mixing an aqueous solution of copper sulfate at 50 ° C. or lower. Here, when the temperature of the aqueous copper sulfate solution exceeds 80 ° C., the generated Bordeaux liquid particles are partially aggregated, and when diluted and used as a Bordeaux liquid, the suspension property in water is unfavorably deteriorated. In addition,
When mixing a mixture of fine slaked lime or water with a copper sulfate aqueous solution, a surfactant may be added and mixed.

When a high-concentration bordeaux liquid composition prepared using conventional slaked lime is used after dilution, a bordeaux liquid prepared at a high temperature, a bordeaux liquid prepared from powdered slaked lime, After a long time, the Bordeaux solution
Poor suspension in water, adhesion to agricultural products, concentration change due to sedimentation in the container and clogging of the nozzle of the sprayer are problematic, but as the slaked lime raw material as in the present invention, a mixture of fine slaked lime powder or water The bordeaux liquid composition using the compound exhibits a suspension property in water which is almost the same as that of a bordeaux liquid prepared by a conventional method even when diluted after storage for a long time and used as a bordeaux liquid.

As described above, the composition for a Bordeaux solution of the present invention can be prepared by simply mixing a mixture of the above-mentioned fine slaked lime powder or water with an aqueous copper sulfate solution, and a conventional composition for a Bordeaux solution. It is possible to omit the wet pulverization step, which was essential in the preparation step. The reason is that the mixture of fine slaked lime powder or water used as a raw material for slaked lime, together with the fine particles, has a large specific surface area, so that the rate of dissolving slaked lime in water is high even in a high temperature range (slaked lime). The higher the temperature, the greater the chance of ion-to-ion reaction in water with the aqueous copper sulfate solution, the greater the number of reactive particles in the water, resulting in the generation of fine Bordeaux liquid particles, It is inferred that even if the reaction occurs on the surface of slaked lime particles, the surface area of each slaked lime particle is large, and therefore, the reaction area is large, so that aggregation is unlikely to occur, and fine, fine suspended Bordeaux liquid particles are generated. Is done.

The composition for a bordeaux solution of the present invention can be prepared at various concentrations. For example, the composition for a bordeaux solution of the present invention may have the same concentration as that of a conventional bordeaux solution. High concentration is desirable,
Fine slaked lime [Ca (OH) ₂ ] and copper sulfate (C
It is practical that the total concentration of the solid content of uSO ₄ .5H ₂ O) is 25% by weight or more. If the concentration of the composition for a Bordeaux solution is less than 25% by weight in terms of the solid content, it is not preferable because the container or the like must be large when stored after production, and the transportation cost and the like increase. Further, in the case of a low concentration, if left for a long period of time, the amount separated from water may increase, which may be troublesome in re-dispersion, which is not preferable.

The highest concentration that can be prepared as the composition for a Bordeaux solution of the present invention is obtained by using fine slaked lime powder having a water content of 0 to 1% by weight and a saturated aqueous solution of copper sulfate at 80 ° C. Practically, it is a mixture of copper sulfate having the largest amount of lime to copper sulfate at a ratio corresponding to quicklime 6, which is a wet powder having a water content of about 5% by weight.

Here, the mixer that can be used to mix the mixture of fine-particle slaked lime powder or water and the aqueous solution of copper sulfate is not particularly limited, and examples thereof include a ribbon mixer, a bag mixer, and a Nauta mixer. , A Henschel mixer, a kneader, a pony mixer, a clutcher and the like can be used. In the case of a slurry,
A mixer with a general stirring blade can be used.

The composition for bordeaux solution of the present invention includes:
Active ingredient amount Ca of Bordeaux mixture composition in our _{(OH) 2} and CuSO ₄ · 5H ₂ O in the total solid content weight 0.1 to 5.0
By adding the surfactant by weight, the viscosity of the resulting Bordeaux liquid composition can be reduced.
After preparation, it is possible to prevent the growth of Bordeaux liquid particles in the composition for Bordeaux liquid, and also to improve the wettability of the crop surface when spraying with dilution with water, that is, to improve the spreadability. The dispersibility and suspension of the subsequent Bordeaux liquid particles can be improved.

The surfactant may be added in advance either to a mixture of fine slaked lime powder or water or an aqueous copper sulfate solution, or to a mixture of fine slaked lime powder or water and an aqueous copper sulfate solution. May be added during or after mixing. When the amount of the surfactant is less than 0.1% by weight, the effect of adding the surfactant is not preferable because the effect is small. It is not preferable because it cannot be expected.

As the surfactant, for example, JP-A-2-279610, JP-A-2-279612,
Homopolymers or copolymers of carboxyl group-containing vinyl compounds, copolymers of carboxyl group-containing vinyl compounds and other vinyl compounds as disclosed in JP-A-4-198102 and JP-A-4-198103, or Those having a salt of these polymers as an active ingredient, those having a salt of naphthalenesulfonic acid, alkylnaphthalenesulfonic acid or any of these formalin condensates as an active ingredient, and those having the following general formula (a)

Embedded image (Wherein, R ¹ represents a hydrogen atom or a methyl group, R ² represents an alkyl group, an alkenyl group, or an alkylphenyl group having 1 to 30 carbon atoms, m is 2 to 4, and n is 1 to 50) It is preferable to use those containing the component represented by the formula (1) as an active ingredient or those containing an alkylene oxide adduct of a polyamine as an active ingredient. By using these surfactants, it is possible to reduce the viscosity of the composition for bordeaux liquid to increase the concentration, and to prevent the growth of bordeaux liquid particles during storage as described above. However, on the surface of the Bordeaux liquid particles dispersed after diluting the composition for Bordeaux liquid of the present invention with water, the surfactant is adsorbed by the structural properties of the molecules of the surfactant to form a three-dimensional secondary aggregate. Can be formed to improve suspension.

Among the above-mentioned surfactants, examples of the vinyl compound having a carboxyl group include acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid and alkali metal salts, ammonium salts, and those having 1 to 20 carbon atoms.
And alkylene oxide adducts such as ethylene oxide adducts and propylene oxide adducts.

Other vinyl compounds used by copolymerizing with a carboxyl group-containing vinyl compound include, for example, ethylene, propylene, butadiene, isoprene,
2-methyl-1-butene, 1-hexene, isobutylene, diisobutylene, 1-dodecene, styrene, p-methylstyrene, isopropyl vinyl ether, butyl vinyl ether, isopropenyl methyl ether, vinyl acetate, acrylamide and the like. The amount of these other vinyl compounds to be used is preferably 80% by weight or less, more preferably 60% by weight or less, based on the total amount with the carboxyl group-containing vinyl compound.

Further, as a salt of naphthalenesulfonic acid, alkylnaphthalenesulfonic acid or any of these formalin condensates, a lower amine salt such as an ethanolamine salt can be used in addition to an alkali metal salt or an ammonium salt. The degree of condensation of the formalin condensate is
Those having an average degree of condensation in the range of 2 to 10 are preferred.

In the compound represented by the general formula (a), R ² is methyl, ethyl, propyl, isopropyl, butyl, hexyl, octyl, decyl, dodecyl, isotridecyl. Group, tetradecyl group, hexadecyl group, docosyl group, oleyl group,
Examples include a linole group, a phenyl group, an octylphenyl group, a nonylphenyl group, and a dodecylphenyl group. Further, examples of C _m H _2m O in the general formula (a) include an oxyethylene group, an oxypropylene group, an oxybutylene group, and an oxytetramethylene group, and these include ethylene oxide, propylene oxide, butylene oxide, and tetrahydrofuran. It is added.

In the alkylene oxide adduct of polyamine, the polyamine may be ethylenediamine, trimethylenediamine, hexamethylenediamine,
Diethylenetriamine, 1,2,3-triaminopropane, triethylenetetramine, etc., and a molecular weight of 500
５００500,000 polyethyleneimine.
An alkylene oxide adduct of a polyamine refers to an alkylene oxide such as ethylene oxide, propylene oxide or butylene oxide alone or in addition to the above polyamine.
It is obtained by addition polymerization as more than one kind of block or random adduct.

Of the bordeaux liquid compositions prepared as described above, those having fluidity may be subjected to a wet grinding treatment after preparation to obtain a bordeaux liquid composition having a smaller particle size. it can. Ball mills, tube mills, tower mills,
A bead mill, pearl mill, attritor, or the like, or a homogenizer or an ultrasonic emulsifier having an action of loosening aggregates can be used.

[0030]

The present invention will be further described with reference to the following examples. Example 1 346 ml of water was placed in a 1-liter beaker, and then 204 g of fine slaked lime powder having an average particle diameter of 4.9 μm, a specific surface area of 27.0 m ² / g and a water content of 0.5% by weight was added, followed by thorough stirring. Make a creamy slaked lime-water mixture. In addition, the temperature of the creamy slaked lime-water mixture was 23.5 ° C.
Separately, add 300 ml of water at 45 ° C to a 500 ml beaker.
And then add copper sulfate (CuSO ₄ .5H ₂ O) 150
g is dissolved, heated and hydrated to a concentration of about 33.3% by weight.
A copper sulfate aqueous solution (45 ° C.) was prepared. Next, the above-mentioned creamy slaked lime-water mixture was stirred with four propeller blades having a diameter of about 5 cmφ at a rotation of 150 rpm, while the copper sulfate aqueous solution was gradually added thereto. [Ca _{(OH) 2} and CuSO ₄ · 5H
₂ O] about 35% by weight of a slurry-like Bordeaux liquid composition (corresponding to a 150-150 type Bordeaux liquid) was obtained in an amount of about 1.0 kg.

Example 2 7.0 liters of water was placed in a 20 liter polyethylene bucket, and then the average particle size was 4.9 μm and the specific surface area was 2
7.0 m ² / kg, moisture content 0.5% by weight of fine lime powder 4.1 kg, and the molar ratio of maleic acid and styrene 1:
70 g of the ammonium salt of the copolymer of No. 2 was added, and the mixture was stirred well to disperse the slaked lime particles in water to prepare a creamy slaked lime-water mixture at 23.0 ° C. Separately, 6.0 liters of water at 50 ° C. was put into a 20-liter enameled copper bucket, and copper sulfate (CuSO ₄ .5H ₂ O) 3.0 k was added.
g is dissolved, heated and hydrated to a concentration of about 33.3% by weight.
9.0 kg of an aqueous copper sulfate solution (about 44 ° C.) was prepared. Next, while stirring the cream-like slaked lime-water mixture with four blades of a propeller blade shape of about 12 cmφ at a rotation of 150 rpm, an aqueous solution of copper sulfate was gradually added, and stirring was further continued for 60 minutes to obtain a solid content concentration [Ca (OH) ₂ and CuSO ₄
5H ₂ O] to about 35 wt% of the slurry Bordeaux mixture composition (150-150 formula Bordeaux mixture equivalent) to obtain about 20 kg.

Example 3 In Example 1, water 34 for dispersing fine slaked lime was used.
The same procedure as in Example 1 was repeated except that 7 g of sodium naphthalenesulfonate formalin condensate (average degree of condensation: 6.5) was added to 6 ml of the composition for a bordeaux liquid slurry (150).
Approximately 1.0 kg was obtained.

Example 4 In Example 1, water 34 for dispersing fine slaked lime was used.
A slurry-type bordeaux liquid composition (150-150 type bordeaux liquid) was prepared in the same manner as in Example 1 except that 7 g of a homopolymer (Mw = 10,000) of an acrylate of an EO (10) adduct of methanol was added to 6 ml. Equivalent).

Example 5 In Example 1, water 34 for dispersing fine slaked lime was used.
10. EO (30) adduct of ethylenediamine in 6 ml
A slurry-like composition for a Bordeaux liquid (corresponding to a 150-150 type Bordeaux liquid) was obtained in the same manner as in Example 1 except that 5 g was added.

Example 6 Approximately 19 kg of a slurry-like bordeaux liquid composition obtained in the same manner as in Example 2 was wet-milled with a pearl mill [Ashizawa Co., Ltd., PMISTS type] at a peripheral speed of 8 m / sec, and filled with glass beads. The wet pulverization process was performed once under the conditions of 300 ml and a stock solution supply rate of 5 liter / min.

Example 7 A 75-liter Henschel mixer was used, and the average particle size was 6.5.
13.6 kg of fine slaked lime having a particle size of 3 μm, a specific surface area of 30.8 m ² / g and a water content of 0.9% was added, and while stirring, ammonium salt 1 of a copolymer of maleic acid and styrene having a molar ratio of 1: 2 was added.
After adding 1.2 kg of room temperature water in which 60 g was dissolved and stirring for 5 minutes, a copper sulfate aqueous solution at 50 ° C. in which 2.0 kg of copper sulfate (CuSO ₄ .5H ₂ O) was dissolved in 3.2 kg of water was added. After stirring for 5 minutes, the solid content concentration [Ca (OH) ₂ and Cu
[SO ₄ .5H ₂ O], about 20 kg of a wet powder-like composition for a Bordeaux liquid (corresponding to a 150-500 type Bordeaux liquid) of about 78% by weight was obtained.

Comparative Example 1 In Example 3, the average particle diameter was 6.5 μm, the specific surface area was 13.0 m ² / g, and the water content was 0.5% instead of the fine slaked lime powder.
In the same manner as in Example 3 except that dry digested slaked lime produced according to the conventional method was used, a slurry-like Bordeaux liquid composition (equivalent to a 150-150 type Bordeaux liquid) was obtained.

Comparative Example 2 In Example 1, 150 g of powdery lime for a Bordeaux solution was replaced with 390 m of water at normal temperature in place of the creamy slaked lime-water mixture.
1 and wet cooling, and after cooling, 7 g of sodium naphthalenesulfonate formalin condensate (average degree of condensation 6.5) and water were added to make 550 g, and a creamy slaked lime-water mixture at 25.5 ° C. was used. In the same manner as in Example 1, a slurry-like composition for a Bordeaux liquid (corresponding to a 150-150 type Bordeaux liquid) was obtained.

Comparative Example 3 6.0 g of powdered lime for bordeaux liquid was wet digested in 24 ml of water, allowed to cool, transferred to a 1 liter beaker, and added with water to 200 ml to prepare a slaked lime emulsion at 23.5 ° C. . While stirring this slaked lime emulsion, copper sulfate (CuSO
₍ 4.5H ₂ O) dissolved in 800 ml of water
A 2.0 ° C. aqueous solution of copper sulfate was gradually added to obtain a 6-6 formula Bordeaux solution.

Immediately after the preparation of the compositions for bordeaux solution of Examples 1 to 6 and Comparative Examples 1 and 2 and after one day and one month, each was diluted 25-fold with water to obtain a 6-6 type bordeaux solution. Immediately after the preparation of the composition for bordeaux solution of Example 7 and one day and one month after the preparation of the composition for a bordeaux solution of Example 7, each was diluted 50-fold with water, and was diluted with a 2-10 type bordeaux solution. The average particle diameter after 1 day and 1 month immediately after the preparation of the liquid and the 6-6 formula Bordeaux liquid of Comparative Example 3 was measured by a laser diffraction particle size distribution analyzer [Ltd.
Shimadzu SALDA-1100]
The results obtained are set forth in Table 1 below.

[0041]

[Table 1]

In Table 1, the measurement results of each Example are shown in Comparative Example 3 immediately after the preparation, even after 1 day and 1 month.
It was confirmed that the particle diameter became almost the same as that of the conventional bordeaux solution immediately after the preparation, and that the particles could be stored for a long period without growth or aggregation of the particles even after one month. On the other hand, in the compositions for bordeaux liquid obtained by the reaction in a concentrated state obtained by using slaked lime by conventional dry digestion and slaked lime by wet digestion in Comparative Examples 1 and 2, the particle diameter of the composition immediately after the preparation is also small. Large, poor suspension in water, and storage of conventional Bordeaux solution for a long period of time caused growth and aggregation of particles, resulting in poor suspension in water.

[0043]

As described above, according to the present invention, the slaked lime raw material of the composition for a Bordeaux solution has an average particle diameter of 7.5 μm.
By using a mixture of fine slaked lime having a specific surface area of 20 m ² / g or more or a mixture with water, it can be stored at a high concentration for a long period of time, and only by dilution with water, the particle size is fine, uniform and of high quality. It is possible to provide a composition for a Bordeaux solution that becomes a stable Bordeaux solution.

Claims (8)

[Claims] 1. A reaction product of a mixture of slaked lime powder or water having an average particle diameter of 7.5 μm or less and a specific surface area of 20 m ² / g or more, and an aqueous copper sulfate solution, comprising Ca (O
Bordeaux mixture composition H) ₂ and the total concentration of solids as CuSO 4 · _5H 2 _O is characterized by a 25% or more by weight of the slurry-like or wet powder-like. 2. A mixture of slaked lime powder or water whose reaction product has an average particle size of 7.5 μm or less and a specific surface area of 20 m ² / g or more, and a copper sulfate aqueous solution are mixed at a temperature of 80 ° C. or less. The composition for a Bordeaux solution according to claim 1, which is obtained by the above method. 3. A reaction product in which a mixture of slaked lime powder or water having an average particle diameter of 7.5 μm or less and a specific surface area of 20 m ² / g or more, and a copper sulfate aqueous solution are mixed at a temperature of 80 ° C. or less. The composition for a Bordeaux liquid according to claim 1, which is obtained by wet pulverization. 4. Moreover, the scope of 0.1 to 5.0 wt% of the total concentration of solids in a surfactant as Ca _{(OH) 2} and CuSO ₄ · 5H ₂ O in the amount of active ingredient of the surfactant The composition for a Bordeaux solution according to any one of claims 1 to 3, wherein the composition is contained in the composition. 5. A surfactant comprising a homopolymer or a copolymer of a carboxyl group-containing vinyl compound, a copolymer of a carboxyl group-containing vinyl compound and another vinyl compound or a salt of these polymers as an active ingredient. The composition for a bordeaux solution according to claim 4, which is used. 6. The method according to claim 1, wherein the surfactant is naphthalene sulfonic acid,
The composition for a Bordeaux solution according to claim 4, wherein the composition comprises an alkylnaphthalenesulfonic acid or a salt of any of these formalin condensates as an active ingredient. 7. The surfactant is represented by the general formula (a): (Wherein, R ¹ represents a hydrogen atom or a methyl group, R ² represents an alkyl group, an alkenyl group, or an alkylphenyl group having 1 to 30 carbon atoms, m is 2 to 4, and n is 1 to 50) The composition for a Bordeaux solution according to claim 4, which comprises a compound represented by the following formula: 8. The surfactant according to claim 4, wherein the surfactant comprises an alkylene oxide adduct of a polyamine as an active ingredient.
The composition for bordeaux solution according to the above.