JP2000351705A - Montan wax derivative mixture and agrochemical composition by using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject mixture capable of gradually and completely releasing an agrochemical active ingredient, capable of maintaining the activities for a long period, excellent in compatibility with the agrochemical active ingredient, and useful for labor-saving treating granular agent by mixing waxes having a respectively specific melting point and acid value. SOLUTION: This mixture comprises a montanic acid wax and a montanic ester wax. The montanic acid wax has >=60 deg.C melting point and >=100 mg-KOH/ g acid value, and the montanic ester wax has >=60 deg.C melting point and <=25 mg-KOH/g acid value. The sustained release agrochemical preparation contains >=5 wt.% mixture, 0.01-50 wt.% agrochemical active ingredient (having >=100 ppm solubility in water and >=100 deg.C melting point), and an inorganic diluting carrier (e.g. calcium carbonate).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sustained-release pesticide granule which can easily use an agrochemical active ingredient for controlling crop pests, and more particularly to a pesticide active ingredient, montanic acid wax and montanic acid ester wax. The present invention relates to a sustained-release pesticide granule containing a mixture of montan wax derivatives.

[0002]

2. Description of the Related Art In recent years, paddy fields have been rapidly scaled up and mechanized to reduce the cost of rice cultivation. In response to this, technological innovation in the method of spraying pesticides has progressed,
Various labor-saving formulations and application methods have been developed. By the way, various types of agricultural chemicals for paddy fields, such as insecticides, are used, such as dusts, granules, emulsions, wettable powders, and flowables. As a method of applying these preparations to paddy fields, a direct spray method is generally used. In many cases, in the direct spraying method, an operator steps into a paddy field, and the operator carries out an operation while carrying a heavy spraying machine or the like. Therefore, the above method is a serious task for elderly farmers, and such a situation is not preferable in view of the recent increase in the proportion of elderly workers in Japan in Japan. Therefore, a more labor-saving solution to the formulation and application method is desired.

On the other hand, in recent years, development of a nursery box treatment method in which an agricultural chemical composition is applied to a paddy rice nursery box before rice planting has been promoted in contrast to the direct spraying method. The biggest advantage of the nursery box treatment method is that there is no need to spray pesticides in paddy fields as in the direct spray method,
Transplanting the already treated paddy rice seedlings into paddy fields. Therefore, the seedling box treatment method is an ideal labor-saving application method. In general, pests in paddy fields occur for a long period from planting to after heading. Therefore, a treatment agent for seedling boxes is required to have a long-term stable pesticide active ingredient effect. Formulations for maintaining the efficacy of pesticidal active ingredients over a long period of time are known. These are obtained by mixing a pesticidal active ingredient with a hydrocarbon-based wax and diluting or supporting the same on minerals or the like to make them hydrophobic. Since such conventional preparations mainly control the release of the pesticidal active ingredient by utilizing the water repellency of the wax, it was impossible to control the release of the pesticide active ingredient to a high degree.

[0004] WO 95/09532 discloses a method for sustained release of a pesticidal active ingredient by matrix formation using such a wax. In this publication, an agricultural chemical composition containing an agricultural chemical active ingredient, a hydrophobic substance having a melting point of 50 ° C. or higher, and a substance having an oil absorbing ability contains a compound (release control agent) for controlling the release of the agricultural chemical active ingredient. I have. Nevertheless, according to the investigations of the present inventors who have repeated the invention described in the publication, satisfactory elution control was not achieved only by using the water repellency of the wax. In addition, although the sustained-release pesticide composition containing the release controlling agent provides a sustained release, it is difficult to release nearly 100% of the pesticide active ingredient in the composition, and a large amount of the pesticide active ingredient is not released. It was found to remain in the composition.

[0005] The reason why a large amount of the pesticidal active ingredient remains in the composition without being released is that the release controlling agent used is poorly compatible with the hydrophobic wax.
It is possible that a uniform matrix is not formed in the composition. In fact, when the present inventors supplemented the example of WO95 / 09532, the basic elution pattern described a parabolic curve, and the release of the pesticidal active ingredient in the initial stage was large, and the release was stopped halfway. It was found that it was not possible to sustain the release of the pesticidal active ingredient until the latter period while controlling the amount. That is, such a method is not suitable for a sustained-release pesticide formulation.

[0006] Japanese Patent Application Laid-Open No. 7-179448 discloses a compound having a chemical name of N-methyl-N'-nitro-N "-[(tetrahydro-3-furanyl) methyl] -guanidine. This compound has high insecticidal activity and has a broad insecticidal spectrum. This compound has the feature of being extremely soluble in water. Therefore, when this compound is used for rice paddy box application, it is necessary to establish advanced elution control technology in order to maintain the insecticidal effect for a long period of time.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a montan wax derivative mixture having excellent compatibility with a pesticidal active ingredient, which is capable of sustaining its efficacy over a long period of time by slowly releasing the pesticidal active ingredient, and a mixture thereof. An object of the present invention is to provide an agricultural chemical formulation using the same. Another object of the present invention is to provide a montan wax derivative mixture having excellent compatibility with pesticidal active ingredients that can release the pesticidal active ingredient gradually and almost completely, and that can sufficiently maintain its efficacy over a long period of time. An object of the present invention is to provide a pesticide formulation used.

Therefore, the object of the present invention is to 1) a specific melting point,
A mixture of a montan wax derivative having a specific acid value, comprising a montanic acid wax having an acid value and a montanic acid ester wax having a specific melting point and acid value, 2) a pesticidal active ingredient, montanic acid wax having a specific melting point and acid value Provided is a montan wax derivative mixture having a specific acid value, comprising a montanic acid ester wax having a specific melting point and an acid value, a pesticide active ingredient and an inorganic diluent carrier, and a method for producing the same. Is to do.

[0009]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have found that a montan wax derivative containing a specific amount of free fatty acid in an agricultural chemical formulation, that is, an acid value within a certain range, is obtained. It has been found that by adding a mixture of the above, the dissolution of the pesticidal active ingredient in the pesticide preparation can be controlled to a high degree. The present invention has been made based on this finding.

That is, the present invention is as follows. [1] A montan wax derivative mixture comprising a montanic acid wax and a montanic acid ester wax and having an acid value of 25 to 100 mgKOH / g. [2] The melting point of the montanic acid wax is 60 ° C. or more, the acid value is 100 mgKOH / g or more, and the melting point of the montanic acid ester wax is 60 ° C. or more and the acid value is 25 m
The montan wax derivative mixture according to the above [1], wherein the mixture is not more than gKOH / g. [3] A sustained-release pesticide formulation comprising the montan wax derivative mixture according to the above [1] or [2], an agrochemical active ingredient and an inorganic diluent carrier. [4] The sustained-release pesticide granule according to the above-mentioned [3], wherein the water solubility of the pesticidal active ingredient is 1,000 ppm or more. [5] The above-mentioned [4], wherein the pesticidal active ingredient having a water solubility of 100 ppm or more is N-methyl-N′-nitro-N ″-[(tetrahydro-3-furanyl) methyl] guanidine. Controlled release pesticide granules. [6] The acid value of the pesticidal active ingredient, montanic acid wax and montanic acid ester wax, is 25-100 mgK.
OH / g is a sustained-release pesticide granule obtained by mixing, granulating and then pulverizing a montan wax derivative mixture that is OH / g and an inorganic diluent carrier, and is a liquid during mixing and granulation. A pesticide granule characterized in that a part thereof is a montan wax derivative mixture and the non-liquid part is a pesticide active ingredient and an inorganic diluent carrier. [7] The melting point of the montanic acid wax is 60 ° C. or more, the acid value is 100 mg KOH / g or more, and the melting point of the montanic acid ester wax is 60 ° C. or more and the acid value is 25 m
The pesticide granule according to the above [6], which is not more than gKOH / g.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the term "agrochemical active ingredient" refers to a compound having biocidal activity and used for agricultural and horticultural purposes. In particular, as the agricultural chemical active ingredient according to the present invention, an agricultural chemical active ingredient having a water solubility of 100 ppm or more and a melting point of 100 ° C. or more is preferable. More preferably, the pesticide active ingredient has an aqueous solubility of 5,000 ppm or more. Specific examples of the pesticidal active ingredient according to the present invention include N-methyl-N′-nitro-N ″-[(tetrahydro-3-furanyl) methyl] -guanidine. The content of the pesticidal active ingredient in the sustained release pesticide granules of the present invention is determined by the physical properties of the active ingredient, the application scene,
Usually it is in the range of 0.01% to 50% by weight, preferably in the range of 0.5% to 20% by weight.

In the present invention, the montan wax derivative means a modified wax such as a montanic acid wax or a montanic acid ester wax obtained by subjecting a montan wax to a chemical reaction such as oxidation or esterification. In the present invention, the montan wax is a hard wax obtained by distilling asphalt-based coal and lignite at a high temperature or extracting with a solvent, and has an acid value of 70-70.
It is about 100 mgKOH / g. In the present invention, the montanic acid wax is a montan wax derivative (modified wax) obtained by oxidizing deresinated montan wax,
An acid value equal to or higher than the acid value of montan wax (about 100 mgKOH /
g), and the specific product name is LUW
AXS (manufactured by BASF, acid value 143).
In the present invention, the montanic acid ester wax is a montan wax derivative (modified wax) obtained by esterifying montanic acid wax with various alcohols, and a specific trade name is LUWAX E (manufactured by BASF, melting point: 7).
6 ° C., acid value; 21 mg KOH / g), LUWAX OP
(BASF, melting point; 84 ° C., acid value; 11 mg KO
H / g), LUWAX LEG (manufactured by BASF, melting point;
76 ° C, acid value; 25 mgKOH / g), and the acid value is 10-25 mgKOH / g depending on the difference in alcohol.
g. The acid value of the mixture of montanic acid wax and montanic acid ester wax is therefore usually 25-1.
00 mg KOH / g, beeswax (association standard acid value 17-22 mg KOH / g), candelilla wax (12-20 mg KOH / g), wood wax (25 mg KO
H / g or less), carnauba wax (10 mg KOH / g)
), Rice wax (10 mg KOH / g or less), and free fatty acids in a range that cannot be obtained with other natural waxes. The free fatty acid is one of the components contained in naturally derived fats and oils (waxes) such as montan wax mainly containing an ester compound composed of a higher fatty acid and a monohydric or higher alcohol. Fatty acids are amphiphilic compounds that combine a carboxylic acid, which is a hydrophilic group, and a hydrocarbon, which is a hydrophobic group, as structural elements, and are compatible with hydrophobic substances such as wax while being water-soluble or hydrophilic. Also shows properties. Therefore, it is considered that a mixture obtained by mixing a pesticidal active ingredient or the like with a fat or oil containing a fatty acid can form a uniform matrix, and can highly control the elution of the active ingredient. When manufacturing a sustained-release pesticide granule, each of the pesticide active ingredient and the inert carrier is added alone, and heated to a melting point of each of the pesticide active ingredients or lower, and then melt-mixed as a granulated composition. good.

The mixture of the montanic acid wax and the montanic acid ester wax of the present invention can be easily produced by heating, melting, mixing and cooling each of them to a temperature higher than the melting point thereof. When producing sustained-release pesticide granules, add each to the pesticidal active ingredient and the inert carrier alone, heat to a temperature not lower than the melting point of each and not more than the melting point of the pesticide active ingredient, and melt as a granulated composition. You may mix. The amount of the mixture of montanic acid wax and montanic acid ester wax to the sustained-release pesticide granules of the present invention is determined by the concentration of the added pesticide active ingredient, the application scene of the resulting pesticide granules, and the physical properties of the diluent carrier. However, it is usually at least 5% by weight, preferably at least 10% by weight. The upper limit of the addition amount is set to be equal to or less than the total oil supply capacity of the dilution carrier. This makes it possible to discharge the mixture in the form of powder without melting into a dough at the time of melt mixing, and it is possible to suppress the adhesion of the particles during granulation. Preferably,
From an economical point of view, the upper limit of the amount added is 20% by weight.

The mixing ratio between the montanic acid wax and the montanic acid ester wax is determined by the desired elution period of the active ingredient. The larger the mixing ratio of the montanic acid wax, the higher the acid value after mixing, and the shorter the elution period. Conversely, if the mixing ratio of the montanic acid ester wax is large, the acid value after mixing is small, and the elution period is prolonged. The mixing ratio between the montanic acid wax and the montanic acid ester wax is preferably selected so that the acid value after mixing is 25-100 mgKOH / g, and the montanic acid wax having an acid value of 143 mgKOH / g and the montanic acid having an acid value of 21 mgKOH / g. The mixing ratio in the case of ester wax is in the range of 1:25 to 1: 0.5. The required elution period differs between eastern Japan and western Japan depending on the climate, but generally ranges from 30 days to 60 days. When an elution period of about 30 days is required as in the case of rice seedling box treatment in eastern Japan, the acid value after mixing is 50%.
The mixing ratio can be selected to be about mgKOH / g. In the case of a montanic acid wax having an acid value of 143 mgKOH / g and a montanic acid ester having a sunshine of 21 mgKOH / g, the mixing ratio is 1: 3. The elution period can be adjusted by adjusting the mixing ratio of the wax, that is, the acid value after mixing.

In the present invention, the inorganic diluent carrier is an inorganic diluent carrier added for adjusting the effective concentration of the pesticidal active ingredient in the pesticide granule of the present invention. As the inorganic diluent carrier, any hydrophobic inorganic substance generally used in agricultural chemical compositions can be used, but calcium carbonate is preferred in terms of cost and preparation. There are two types of calcium carbonate, heavy type and light type. In consideration of the oil absorbing ability of a mixture of montanic acid wax and montanic acid ester wax, either one of them is used alone or in combination. Furthermore,
When calcium carbonate alone does not have sufficient oil absorbing ability, talc or white carbon can be added as an inorganic diluent carrier. Talc is crushed talc, and white carbon is commercially available as a carrier diluent for pesticides containing silicon dioxide as a main component. The inorganic diluent carrier may be added to the sustained-release pesticide granule of the present invention as long as it has sufficient capacity to absorb a mixture of montanic acid wax and montanic acid ester wax. It is calculated from the maximum addition amount of the wax mixture and the pesticidal active ingredient and the oil absorbing ability of calcium carbonate.

The method for producing the sustained-release pesticide granules of the present invention is as follows. That is, a mixer equipped with a heating device for the pesticidal active ingredient, a mixture of montanic acid wax and montanic acid ester wax, and an inorganic diluent carrier (for example,
Heat and mix with a floating mixer). In this case, the heating temperature is preferably equal to or higher than the melting temperature of the mixture of montanic acid wax and montanic acid ester wax and lower than the melting point of the pesticidal active ingredient. If the heating temperature is lower than the melting temperature of the mixture of the montanic acid wax and the montanic acid ester wax, the mixture cannot be uniform, and not only the granulation property during heating granulation becomes poor but also the expected sustained release. This is because it may not be possible. When the heating temperature is set to be equal to or higher than the melting point of the pesticidal active ingredient, the active ingredient and the mixture of montanic acid wax and montanic acid ester wax are not uniformly mixed in a liquid state, or the active ingredient is localized when coagulated. In some cases, the expected sustained release cannot be achieved. After the heating and mixing, the selected mixture is granulated, and the granulator to be used is not particularly limited as long as it has a heating device.Specifically, the purpose is to obtain a cylindrical molded product. Extrusion granulators equipped with a screen suitable for the particle size of, and rolling granulators for obtaining spherical molded products are exemplified. The temperature at which the granulation is performed is set to a temperature at which the mixture of the montanic acid wax and the montanic acid ester wax to be used melts. Further, the obtained granules are crushed and sieved to obtain the desired sustained-release pesticide granules.

[0017]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited to these methods. In addition, all parts which are the compounding amounts of each component are parts by weight. [Example 1] Montanic acid wax (trade name LUWAX)
S, manufactured by BASF, melting point: 75 ° C, acid value: 143 mgK
OH / g) 37.5 parts, montanic acid ester wax (Luwax E, manufactured by BASF, melting point: 76)
112.5 parts of (° C, acid value; 21 mgKOH / g) was charged into a stainless steel beaker, heated to 80 ° C, and stirred at the same temperature until a uniform fluid mixture was obtained. After cooling to room temperature, the solidified uniform mixture was taken out to obtain 150.0 parts of a montan wax derivative mixture. The resulting montan wax derivative mixture had an acid value of 51.5 mgKOH /
g.

Example 2 150.0 parts of the mixture of the montan wax derivative obtained in Example 1 and N as an agrochemical active ingredient
-Methyl-N'-nitro-N "-[(tetrahydro-
20 parts of 3-furanyl) methyl] -guanidine (hereinafter abbreviated as “compound 1”), 730 parts of calcium carbonate (heavy type) as a carrier, 100 parts of S-talc, put all at once into a floating mixer and heated to 80 ° C. And kneaded. The mixture obtained in this state was powdery. This mixture was extruded and granulated using a horizontal granulator (a screen having an opening of 1.0 mm) maintained at 90 ° C.
After the obtained granulated product was crushed, it was sieved from 14 mesh to 28 mesh to obtain granules.

Example 3 20 parts of a pesticidal active ingredient (compound 1), 730 parts of calcium carbonate (heavy type) as carrier, 100 parts of S-talc, montanic acid wax (trade name LUWAXS, manufactured by BASF, melting point; 75 ° C,
Acid value; 143 mgKOH / g), montanic acid ester wax (trade name LUWAX E, manufactured by BASF, melting point;
112.5 parts of (76 ° C., acid value; 21 mg KOH / g) were put together in a floating mixer and heated to 80 ° C. and kneaded. The mixture obtained in this state was powdery. This mixture was extruded and granulated using a horizontal granulator (a screen having an opening of 1.0 mm) maintained at 90 ° C.
After the obtained granulated product was crushed, it was sieved from 14 mesh to 28 mesh to obtain granules.

Example 4 20 parts of an agricultural chemical active ingredient (compound 1), 820 parts of calcium carbonate (heavy type) as a carrier, 20 parts of white carbon (WC-80D; Shionogi & Co., Ltd.), montanic acid wax (product) First name LUWA
XS, manufactured by BASF, melting point: 75 ° C., acid value: 143 m
gKOH / g) 37.5 parts, montanic acid ester wax (trade name LUWAX E, manufactured by BASF, melting point: 76)
102.5 parts) were put together in a floating mixer and heated to 80 ° C and kneaded. The mixture obtained in this state was powdery. The mixture was kept at 90 ° C. in a horizontal granulator (opening 1.0
extruded and granulated using a screen (mm screen). After the obtained granulated product was crushed, it was sieved from 14 mesh to 28 mesh to obtain granules.

Example 5 20 parts of a pesticidal active ingredient (Compound No. 1), 730 parts of calcium carbonate (heavy type) as carrier, 100 parts of S talc 20 parts of white carbon (WC-80D; Shionogi & Co., Ltd.), Montanic acid wax (trade name LUWAX S, manufactured by BASF, melting point: 7)
70.0 parts of 5 ° C., acid value; 143 mg KOH / g, montanic acid ester wax (trade names LUWAX E, BA
(Manufactured by SF, melting point: 76 ° C, acid value: 21 mgKOH / g)
Put 70.0 parts together in a floating mixer
The mixture was heated to 0 ° C and kneaded. The acid value of the mixture of the montan wax derivatives at this time was 82 mgKOH / g. The mixture obtained in this state was powdery. This mixture was kept at 90 ° C. in a horizontal granulator (opening 1.0 mm).
Extruded and granulated. After the obtained granulated product was crushed, it was sieved from 14 mesh to 28 mesh to obtain granules.

Comparative Example 1 20 parts of an agricultural chemical active ingredient (compound 1), 730 parts of calcium carbonate (heavy type) as carrier, 100 parts of S-talc, montanic acid wax (trade name LUWAX S, manufactured by BASF, melting point) ; 75
(15 ° C., acid value; 143 mg KOH / g) were put together in a floating mixer and heated to 80 ° C. and kneaded. The mixture obtained in this state was powdery.
This mixture was kept at 90 ° C. in a horizontal granulator (aperture 1.
(0 mm screen) for extrusion granulation. After the obtained granulated product was crushed, it was sieved from 14 mesh to 28 mesh to obtain granules.

[Comparative Example 2] 20 parts of an agricultural chemical active ingredient (compound 1), 730 parts of calcium carbonate (heavy type) as a carrier, 100 parts of S-talc, montanic acid ester wax (trade name LUWAX E, BASF) , Melting point: 76 ° C, acid value: 21 mgKOH / g) 15
Put 0.0 parts together in a floating mixer
C. and kneaded. The mixture obtained in this state was powdery. This mixture was extruded and granulated using a horizontal granulator (a screen having an opening of 1.0 mm) maintained at 90 ° C. After the obtained granulated product was crushed, it was sieved from 14 mesh to 28 mesh to obtain granules.

Comparative Example 3 20 parts of an agricultural chemical active ingredient (Compound No. 1), 670 parts of calcium carbonate (heavy type) as a carrier, white carbon (WC-80D,
50 parts of Shionogi Pharmaceutical), 20 parts of polyvinyl alcohol,
Carnauba wax (melting point: 83 ° C., acid value: 9 mg KOH
/ G) 240 parts were put together in a floating mixer, heated to 85 ° C. and kneaded. The mixture obtained in this state was rice cake-like and solidified into blocks when cooled. The mixture was extruded and granulated using a horizontal granulator (a screen having an opening of 1.0 mm) maintained at 95 ° C., and some granulated materials were stuck together. The obtained granulated product was pulverized with a pulverizer and then sieved from 14 mesh to 28 mesh to obtain granules.

[Test Example 1] The dissolution rate of the pesticidal active ingredient released from the granules obtained in Examples and Comparative Examples and the pest control rate were measured and investigated. (1) Dissolution rate The dissolution rate of the pesticidal active ingredient in water was measured by the following method. That is, 250 mg of each of the granules prepared in Examples and Comparative Examples was charged into a 50-mL sealed sample tube containing 25 mL of standard 3 degree hard water and submerged in water. After filtration, the eluting active component in the filtrate was measured by HPLC. The dissolution rate was calculated from the measured values based on the following formula, and the results are summarized in Table 1.

Dissolution rate = (amount of active ingredient in filtrate / amount of active ingredient in granule) × 100 As is clear from Table 1, the granule of the present invention releases an almost constant pesticide active ingredient for about one month. It is possible to do.
Moreover, the pesticidal active ingredient was almost completely eluted in water in about one month.

[0027]

Table 1 Dissolution rate (%) of granules prepared in Examples and Comparative Examples After 3 days After 7 days After 15 days After 30 days Example 2 42.1 53.5 73.0 99. 8 Example 3 42.2 53.4 73.3 99.6 Example 4 39.8 59.0 79.1 98.8 Example 5 48.4 70.1 86.4 99.9 Comparative Example 1 100 0.0 Comparative Example 2 23.1 39.8 59.0 79.1 Comparative Example 3 30.2 42.9 50.1 53.0 ──────────

(2) Mortality The pest control rate was investigated by the following method. That is, 50 g of each of the granules prepared in Examples and Comparative Examples was applied to a nursery box for paddy rice (variety: Koshihikari), and five rice seedlings were planted in Wagner pots (1 / 5,000 ares) the next day.
The test was performed in triplicate for each fraction. At 10, 20, and 30 days after planting, the rice was covered with a wire mesh cylinder, 10 adult female brown planthoppers were released into the cylinder, and the mortality was measured 48 hours later. The mortality is a value in which the ratio of dead insects to the number of tested insects is expressed in%. The results are shown in Table 2. As is clear from Table 2, the granules of the present invention exhibited a mortality of 80% or more even after about one month.

[0029]

[Table 2]

[0030]

Industrial Applicability According to the present invention, the optimal dissolution control of the pesticidal active ingredient in the sustained-release pesticide granule has become possible. The sustained-release pesticide granules of the present invention, the pesticide active ingredient is gradually released,
And it is almost completely released. Therefore, the pesticide granule of the present invention is suitable for treating rice seedling boxes and is excellent as a labor-saving granule. The sustained-release pesticide granules of the present invention are significantly more cost-effective than conventional sustained-release pesticides, and are therefore advantageous in terms of cost. The pesticide granules of the present invention can be prepared by a simple production method.

Continued on the front page (72) Inventor Koichi Nagashima 1144 Togo, Mobara-shi, Chiba Mitsui Chemicals, Inc. (72) Inventor Masahiko Nakamura 1144, Togo, Togo, Mobara-shi, Chiba F-term (reference) 4H011 AC01 BA04 BB11 BC06 BC18 BC19 BC20 DA02 DC06 DD01 DF03 DH13

Claims (7)

[Claims] 1. An acid value consisting of montanic acid wax and montanic acid ester wax having an acid value of 25-100 mg KOH /
g a mixture of montan wax derivatives. 2. The montanic acid wax has a melting point of 60 ° C. or more and an acid value of 100 mg KOH / g or more, and the montanic acid ester wax has a melting point of 60 ° C. or more and an acid value of 25 mg KOH / g or less. The mixture of the described montan wax derivatives. 3. A sustained-release agrochemical formulation comprising the montan wax derivative mixture according to claim 1 or 2, an agrochemical active ingredient and an inorganic diluent carrier. 4. The water solubility of the pesticidal active ingredient is 1,000 pp.
4. The sustained-release pesticide granule according to claim 3, which is at least m. 5. The pesticidal active ingredient having a water solubility of 100 ppm or more is N-methyl-N′-nitro-N ″-[(tetrahydro-3-furanyl) methyl] guanidine. The sustained-release pesticide granules according to the above. 6. The pesticidal active ingredient, montanic acid wax and montanic acid ester wax having an acid value of 25-100.
A sustained-release pesticide granule obtained by mixing and granulating a montan wax derivative mixture of mgKOH / g and an inorganic diluent carrier with heating, and then pulverizing the mixture. Part is a montan wax derivative mixture,
A pesticide granule characterized in that the non-liquid part is a pesticidal active ingredient and an inorganic diluent carrier. 7. The montanic acid wax has a melting point of 60 ° C. or more and an acid value of 100 mg KOH / g or more, and the montanic acid ester wax has a melting point of 60 ° C. or more and an acid value of 25 mg KOH / g or less. The pesticide granules described.