JPS5982303A - Molded article of agricultural chemical, its preparation and its use - Google Patents

Abstract

PURPOSE:A molded article of agricultural chemical having instantly collapsing properties when it is added to water, and a small amount of collapse residue, comprising an agricultural chemical, inorganic powder having specific average diameter consisting essentialy of aggregates of thin pieces having curved surfaces, and fine powder of a resin to be swelled by water absorption. CONSTITUTION:(A) A solution containing an agricultural chemical, especially agricultural chemical having deliquescence, is impregnated into (B) an inorganic powder having <=100mu average diameter, preferably 0.005-0.1mu thickness, and <=50mu length consisting essentially of aggregates of thin pieces having curved surfaces, dried, blended with (C) fine powder of a resin to be swelled by water absorption, preferably capable of absorbing >=100 times as much water as its own weight, forming a swelled size passing through 32 mesh sieve, and molded to give a molded article of agricultural chemical comprising the components A- C. When the water content of the molded article of agricultural chemical by water absorption is raised to about 2wt%, it has instantly collapsing properties, and keeps the strong points.

Description

DETAILED DESCRIPTION OF THE INVENTION Yumei Motomoto relates to a modified product of 4 and a method for producing the same.
J (Regarding an easily dispersible agricultural chemical molded body made of a fat powder and a method for producing the same.

One of the methods for the first reuse of agricultural chemicals is to manufacture, store, transport, etc. in the form of a powder, and then dissolve it in water and spray it near the spraying site for the first reuse. It is being Agricultural chemicals used in such a one-time application method are generally called "water conserving agents."

Medicines that serve as hydric agents are generally dosed by absorbing the solution into a highly liquid-absorbing inorganic weight powder carrier, and in some cases drying and powdering this. For this reason, zeolites, silica, white carbon (
Amorphous powder of hydrated silicon is used as a carrier.

However, since the conventional water solution (1 wound) is in powder form, it has the disadvantage that it mixes with water when reapplying, which is undesirable from the viewpoint of health. Alternatively, there is a method of granulating or molding the powdered whole system into an unmistakable and easy-to-handle shape, such as J37 shape, granule Σf shape, coin shape, etc.

However, the granules or molded bodies (hereinafter L simply referred to as "molded bodies") produced by Kamineki's method absorb moisture in the air and increase the sag of the molded bodies. .゛When the 7ζ molded product is dispersed in water as a hydrating agent by absorbing the moisture in the total amount of water in this way, the molded product does not disintegrate easily, and the molded product has instant disintegration property (the molded product disintegrates in a short period of time). (property of collapsing). Therefore, m
This has the disadvantage that m is delayed. In particular, molded bodies manufactured by supporting agricultural chemicals with oxidation properties have the above-mentioned properties extremely high. When it comes to Hinachi 3
It takes more than a minute to disintegrate. Moreover, in this case, a disintegration residue i'%,j is generated, which is undesirable because it may damage the nozzle of the pesticide sprayer.

In view of the above-mentioned scale, the present researchers investigated
It is a molded product of inorganic rice powder and an agricultural chemical.

Ta. Of course, one method is to put it in a waterproof 14' container to keep it completely dry after molding, but with such a method, it is no longer possible to make a drink with just a few ingredients. There is a drawback that it will not be possible to reach Therefore, the present inventors found that the amount of hygroscopic water increases and
% 'li ) Pesticides, (b) powder with an average diameter of 100μ or less, which is mainly made of curved chips, -metal rods, and (C) water absorption properties (from υJ fat microsai/a body). The drug molded body f: (is): (is something that does.

In this specification - incense, "Nongho" means ≠ 1 ÷ industry, forest 5,
Various types of insects used in fields such as horticulture; TJ, M, M, insects, shelter, weeding, defoliation, repellent, etc.
::G agents, 41 There are a total of 4・■・chemicals such as growth promoters and fertilizers that are applied for the purpose of regulating the growth of crops.

Therefore, if the iL jjc 4 ('I≧Bi1') used in the present invention is not used, nitrate ammonium, nitrate soda, urine,
Fertilizers that can cause 1 disease (particularly with regard to the former, which is extremely redundant, the present invention has the advantage of being able to prevent this danger as well); isoxathion agents, EPBP agents, ethyldiometone agents, and MEP agents. , NAC agent, MPP agent.

A4 T A/ Ci'ill, Cartap agent, CVP
agent, DEP agent, Ikasei, nicotine, EYMC agent, PAP
agent, piic.

P MP-juicy insecticide, sulfur wholesale 1, lime value yellow mixture agent, infrothiolane agent, eclomesol agent, oxycarboxin agent, carpendazole agent, CN A agent, dimethylimole i'1ll-sulfene direct agent, thiuram agent.

D B E l) Agent C, DDPP agent, Q hydrating agent, validamycin wholesale 1. Hydroxyinxazole agent, Fusaride Wholesale 1, Plastocydun S agent, Flobnazole agent,
Stannous agents, organic arsenic agents, organic copper agents, anti-destructive agents such as zinc sulfate, ACN agents, MCP agents, oxasoazone? il, salt purifying agent, chlormethoxynil agent, DPA agent, Pararot'
A', lb B P Herbicides such as A agents; Peeny Agency],
Relabone agent, germination inhibitor, fruit drop prevention agent, stationing agent, m-copromoter, elongation promoter, etc. can be mentioned.

The present invention is applicable to many of these agricultural fields), 1. Among them, -C,
≦Jj2゜ form, if applied to a warm medicine with an instant [Hanakuzu 1 Table 1・i: Go, inferior to 1 h ← condition], will it be 4))? You can do it.・7111 cases 1
As a ζd medicine with a doo (tJ-'r71-1eha), it is rako tilk ashram 7<II, tetra 1 on 14i1, salt nice salt agent, urinary system, nitric fX:: ammonium brekko V1 et al. .

I'm going to make my 44 last a long time! L! As a single carrier, a carrier with 6 diagonals that absorbs moisture in the narrow air and does not break off must be selected. It is desirable that the nozzle of the one-member tampering device should not be blown out, and of course that the carrier should be able to hold as much as 7 liters of material.

Ll, which has the above sex and υr, has good mating properties, and is dispersed in water! A material with a fast disintegration rate of I is preferable as a carrier.

In this 4th section, such conditions are
As for X, the average diameter mainly composed of an aggregate of thin pieces having a curve is 100μ or less, preferably 0.1 to 50μ, and the valley 1゛/1 piece thickness is preferably 0.005 to 0.1
This method uses an inorganic element having the form fl, which is μ, and it is possible to obtain a good agrochemical molded body using this method.

The bulk specific volume of the above clear powder is generally 5 to 30 cc.
/ g, preferably 8 to 7'y, and generally at least 4 g/cc, preferably 7 i/cc or more, more preferably 1 (1/c)
It is advantageous to have an oil absorption of more than c. 5. The suction rate is: jli 4; After crushing the 1-membered powder in a mortar with a 200 mesh 80% passing particle size machine, JIS K
It is 1 determined by the "oil absorption measurement method" described in the 19th member of 6220.

The 11th inorganic powder is a collection of thin flakes with one curve (8), and each flake has a shape similar to that of a twisted fish scale or a potato chip. (It is a 1.1 piece, and has an average length of 100μ on the long side and 7 sides on the left. Furthermore, many of the pieces are partially joined, and when viewed with a Class 1 mirror, it looks like It can have the appearance of para petals or crystals.

The above-mentioned inorganic 'A' powder used in the present invention has a weight of 7 to 1
0 times, the (in-vehicle) boss 11 can hold 6 volumes of water bath liquid and still not be able to retain all the powdery appearance (therefore, it can hold 17, which is 5 to 8 times its own weight, and mulberry). In addition, the above-mentioned 421 Hiki' has the characteristic that it very easily releases tffS-containing pesticides into water.

Furthermore, since the above-mentioned amorphous solid powder with a specific shape has excellent moldability, even if it retains agricultural chemicals and is further mixed with the water-swelling fine side fat powder described later, it will not work. It also has the characteristic of being able to be dry molded without adding a binder.

The above-mentioned inorganic powders having various inferior properties are of the general public 6ζ [1], and can generally be produced by reacting a silicic acid compound under divine conditions and extracting it as a precipitate. It is possible (Japanese Patent Application Laid-open No. 54-93698%)
'rSho Kai No. 55-32753 and previous Kai Sho 55-8
(See Publication No. 5445). For example, to explain calcium silicate as an example, Mizunuma Tsuji I, Tsushio, Shi II, silicate sodium, Keiku potassium, and 1. A method of combining calcium compounds such as calcium hydroxide, calcium nitrate, and calcium sulfate in an aqueous medium and hydrothermally treating the mixture at a temperature of 150 to 250°C; or insoluble silicon dioxide, such as hydrated silicon f- M, diatomaceous earth, etc. and quicklime, slaked lime, etc. in an aqueous medium are prepared by mixing and reacting the water-bathable siliceous antisalt and calcium salt in an aqueous medium at a temperature of 0 to 100°C,
It can also be produced by washing the reactant, adding aqueous solution, and heat-treating it at 150 to 250°C.

Calcium silicate obtained by the above method.

X-like diffraction/Lean 20 is 31-32°, 21-22°
O [, ): It has a peak of q and i on the valley side of 49 to 50 degrees, and a peak of 3,000 to 10,000 i.
According to S. Tora Yoshin, the average diameter is less than iooμ and the wall thickness is 0005 to 0.1μ. In the collection of front pieces, most of the YJf pieces are not flat, but are crystals or crystal-like counterfeit h? It is d.

This chemical compound contains 2Ca0, 3SiO, ・
n5io, -mH,O (however, 0.1(1(10,0
, 1 (m(10)), and 1+o of n is determined by the ratio between the alkali metal content and the silica content of the alkali silicate during the reaction, or the ratio between the silica component and the calcium component.

By treating this product with hydrochloric acid in step ij4, the calcium content can be removed while maintaining the shape.

The present invention supports the above-mentioned specific carrier (h), but molded products made of only the above-mentioned surrounding components tend to have a reduced rate of disintegration in water as they absorb moisture. The timing of the invention is that the water-absorbing and swelling resin used in the present invention is generally used for the water-absorbing and swelling resins, which have an absorbency of 192%, but are generally used without any restriction. more than twice, preferably 10 times
(It is recommended to have a water absorbency of 19 minutes or more than N, f.) Also, it is preferable to use a material in the form of 100 million grains, which can pass 32 meshes in size when inflated underwater.

When a water-absorbing and swelling resin fine powder with an extremely high water absorption rate is used, the disintegrability of the resulting agrochemical molded article in water is good, but on the other hand, the water-absorbed powder... Doesn't it swell into coarse particles? t'
JJ then sprays j Iku no Me Kosae-fshi'', clothes! For example, when selecting a powder, it is necessary to consider its particle size and water absorption rate f.

Examples of the water-absorbing, ""-produced mole fat used in the present invention include the following: ■Punpun-graft rf
I Synthesis System 1iiV [Fat; Saponified product of graft copolymer of starch and acrylonitrile (US I Control Permit No. 39811)
No. 00 specification, U.S. Patent No. 3,997,484 specification line 6,
Special Publication No. 49-43395, J.S. 53-
99291, etc.), graft copolymers of starch and acrylic acid (see Japanese Patent Publication No. 53-46199, Japanese Patent Publication No. 53-462007); ■Cellulose-graft polymer fiber resin: Grafting of cellulose copolymer (see JP-A-51-144476), cellulose cal? Oxymethylated compound (ZF 13677
(See Publication No. 0); ■Synthetic polymer resin: Polyacrylic acid polymer (JP-A-51-112787, JP-A-52-274SS, JP-A-53-46389, JP-A-56 -26909 Publication, JP-A-53-14
1357, etc.), polyacrylonitrile polymers (JP-A-50-46924, t);
-65644, JP-A-52-9095, etc.), polyvinyl alcohol polymers (% JP-A-52-9095, etc.)
Publication No. 11256,! 1. "Refer to Publication No. 50-159538, etc.), polyethylene oxide polymer (Refer to Japanese Patent Application Laid-open No. 52-60282). Available products include, for example, Kll Kelu 201 (trade name, manufactured by Clareisoprene Chemical Co., Ltd., Isoptylent Anhydrous malein dragon cross-linked vehicle combination, water absorption rate 200 times), Sunwet) IM-300
(Product name, manufactured by Sanyo Chemical Co., Ltd., cross-linked graft 1F combination of starch and acrylic acid, water absorption rate 300 times), Aqua Keep 4
S and U1oSli (P, B product name, manufactured by Seitetsu Kagaku Co., Ltd., a combination of acrylic and sash, water absorption rate of 400 to 1000 times), Sumikakel S-50 (product name, manufactured by Sumitomo Kaji Co., Ltd., vinyl alcohol and acrylic Together with acids (combination, non-water absorption 500-70
0x), etc. will be removed.

Water absorption fM ≦ Feedability 1 u ↑ Fat 1
The blending amount of the inorganic powder can be varied widely depending on the water absorbency and the water absorption rate of the 3Ij fat fine powder, but it is generally 1 to 25 parts, preferably 2 parts, per 100 parts of the inorganic powder.
A proportion of ˜20 parts is convenient.

According to the present invention, an agrochemical molded article is produced from one or more of the above-mentioned powders, inorganic powders, and water-absorbing swellable resin powders.

In the production of the agrochemical molded article of the present invention, the mixing order of the agrochemical, the above-mentioned specific inorganic powder, and the water-absorbing swelling resin fine powder 6+\ is not particularly determined, but in general, after the inorganic powder is loaded with Seiei, It is convenient to mix the water-absorbing and swelling resin fine powder and then mold it.

The method of supporting pesticides on inorganic powder is not limited to shafts,
Any known method conventionally used for powdering pesticides may be employed. For example, if the pesticide is in liquid form, it is impregnated with inorganic powder, or if it is solid, it is pre-impregnated. ! Medicine with water-I
It may be impregnated by dissolving or suspending it in the solvent of II. The amount of pesticides supported on the inorganic argon powder can vary widely depending on the type of pesticide, etc., but in general, it can be supported at the foot of 0.5 to 8 of the heavy electricity of the inorganic powder. .

This friend 1. It is preferable to dry the inorganic powder carrying the Q strips, and the moisture content is 1.
Method of reducing 11 as much as possible ρ) Preferably, tyl
It's early 1. i) It is preferable to make it less than %.

The dock prepared in this way was used for 1 year, and the powder was mixed with water absorption.
Mix outhouses.

To simplify the process, a swell-enhancing component such as 7ζ, clay, talc, white carbon, zeolite, etc., which conveys the content of the agricultural chemical component, may be further blended.

Inorganic powder loaded with pesticides has the properties of I.I.i'
A composition prepared by mixing l fat 1v powder and further adding the above-mentioned charge-increasing ingredients is classified as Shichikakuchiko 9, [
” method.

Pesticide moldings are spherical, tablet-like, and cylindrical in shape, with a diameter of 30 rrL/77ε up to 1 history!
,・? Although it is possible to take
): JE molding 1...

Depending on the average life 5~30m/ln, good xL, < is 1°~
It is suitable to manufacture it in the form of a 20 m/m tablet. The molding pressure other than that is generally 30 to 100
1<g/crlL, especially 40-60 kl? /
I hope it's cnl. Molding pressure is aokir/,
In case C is smaller than ffl, the mechanical strength of the scarlet powder molding is insufficient compared to A:;, and it breaks during handling such as transportation ('q'rj powdering).

In the vagina, when the molding pressure is increased to more than 100 kg/ci, the disintegration of the pesticide molded product obtained when it is fractionated into water does not occur within a short period of time.

Akira Nokeo's molded powder is used as agricultural df whole water 4-b agent.
When dissolving 728 medicine in water, it prevents powder from forming when it is dissolved in water, so it does not harm the body layer of the person handling the 728 drug. In addition, the agricultural chemical molded product of the present invention dissolves quickly in water, and moreover, when dissolved in water, there is little disintegration residue of the molded product, so the operation of dissolving it in water The first point is that it can be easily performed. In particular, in the case of pesticides that have i' + 91 decomposition properties, when the hygroscopic moisture content of conventional molded pharmaceutical products reaches 2 parts by weight, the properties of the agricultural chemical molded products in water are poor. The agrochemical molded article of the present invention exhibits excellent instantaneous disintegration even when the hygroscopic moisture content reaches double volume percent culm. (However, even in the agricultural chemical molded article of the present invention, it is of course best to store it in a dry state as much as possible until it undergoes antiphasing.)Therefore, one point is that of the conventional concave cough; molded article. As for J Octopus] 1! It has the advantage of making it possible to use pesticides as hydrating agents and making its handling extremely easy.

In order to explain the present invention more specifically, the present invention will be described below with reference to Examples, and the present invention will be explained with reference to Examples. Should be 1'.

In addition, the molding and moisture absorption measurements were carried out as follows.

(1) Molding (dry type) Using a manual press, the agricultural chemical jolt composition 3II was inserted into a mold with a straightness of 30 m/m, and molded at a pressure of j') r return.

(2) The moisture-absorbing molded product was placed in a constant temperature and high humidity bath, and the actual moisture absorption was measured based on the weight increase.

(3) Disintegration time iz The agrochemical molded body was placed in water, and the time until the whole body disintegrated was measured while pushing the molded body in a pan using a glass rod.

(4) Decay Residue After decay, the residual material was measured using 32 mesh fluids, and if there was any residue, it was marked as "Yes", and if there was no, it was marked as "None". The sprayer sprayed with 32 mesh did not cause the sprayer's eyes to turn blue.

(5) Systematic test 1 100 grains of agricultural chemical molded bodies were placed on concrete from a height of 1 meter, and the handling properties were judged based on whether or not they were destroyed (destruction rate is indicated in the table below). In such cases, it will be displayed as ``I don't know what to do'').

Reference Example II Carrier (solid powder) - performance level 0.32
1 mol/l of lime stalactite 71' and 1001 and 200 lime stalactites crushed to a total flatness of 1 (Soyons Manville Co., Ltd., Celite, 5i02 min 89.2%)
5.8 and 9 were larger than 7f at 25°C under residual pressure.

Put this final 9 pieces into an autoclave.11.
l; i'l L The reaction was carried out under conductivity at 200°C for 10 hours.

Reaction 9 was filtered and washed with 100 cc of ionized water, cycling 3 times and then dried at 100°C for 8 hours. The bulk specific volume of this powder is 8.6 ccl&
Met. It was confirmed that the 151 tij noyairolite type silicon, which has specific peaks around 20° & 20°, 30°, and 50° in the X-hemorrhoid diffraction, exhibits a calcium X-gland diffraction pattern.

As a result of chemical analysis, CaO24.3%, Sin.

Section 68.3, scorching heat loss was 7.4%. In addition, this powder was dispersed in water using SOW ultrasonic waves.
tf, 1, 5in2 mixed in the blended state was fixed at 71 and it was 21 units. These silicon +
'l'? The 5iO7/CcLO molar ratio of Cal'/Um was found to be Z53. It is a moat, and the above calcium is found to be present in the form of dispersed raw material siliconite in an aggregate of flakes with a thickness of about 0.07μ and an average diameter in the longitudinal direction of about 15μ. 1'(B m done.

Example 1 Carrier 10F produced in Reference Example 1, surfactant (arn,
Place 5g of ber oil in a 250 CC beaker, and add 42 Chiparacoat (1, 1
35I ('-tumethyl-4,4'-sopirisonium dichloride) was added dropwise over a period of 20 minutes, and the whole was then pressed for an additional 10 minutes. At this time, the contents were wet, but not yet muddy, and maintained a state of 1-C stirring ability. 1
After 0 minutes, transfer the remaining ingredients to a plate and heat at 60°C for 2 hours at 105°C.
It was dry heated for 3 hours. Dry Kounuchi Tanimono exhibits a light brown fine powder form, with no lumps or granularity, and has a smooth and slippery texture7.

The main component of paraquat (sochloride) in dried bracken is 51.0
1 arm; 36.0 g, sword (minute 08 arm).

1. For 100 parts of if1 body, 75 parts of DBN agent (trade name, Kallon, Rokushodo 99.7%), 27 parts of white carbon, and 1 powder of turtle's water absorption swelling γ dark grain as shown in the first coating below. Uniformly blend 1K 201° (manufactured by Clarei Soprene Chemical Co., Ltd.) into the body and mold the pesticide molded body with the molding pressure shown below. L/ta. The samples thus obtained were subjected to each test by varying the hygroscopic water container. It is also listed in Table 1 of the freezing case.

Example 2 The same operation as in Example 1 was repeated except that an ashram agent was used in place of paraquat in Example 1, and a pesticide molded article with one blemish in disintegration and almost no disintegration residue was obtained. I was able to do something.

Example 3 M1J The same operation as in Example 1 was repeated except that Sumika Kele 5-so (manufactured by Sumitomo Chemical Co., Ltd.) was used instead of Kl Kele as the water-absorbing and cedar liver fat. It was possible to obtain a four-striped molded product with excellent h'i property and almost no disintegration residue.

Applicant: Tokuyama Soda Co., Ltd. Zhengfeng Kagyu Co., Ltd.

Claims (1)

[Scope of Claims] 1. (α) Inorganic powder having a semiuniform diameter of 100 μm or less, which is mainly composed of an aggregate of flakes shouldering a curved surface, and (C) Water absorption swelling Z 1. A pesticide molded article comprising a resin fine powder. 2. The agrochemical molded article according to claim 1, wherein the inorganic powder flakes have a thickness of 0.05 to 0.1 μm, and the length of the 7 pieces is 50 μm or less. 3. The inorganic powder has an XH23 diffraction pattern of 20 to 31.
~32°, 21~22' and 49~50° L
It has one peak, and 2Cα0.3SiO2.n
5io, -mE, O(: However, 0.1(n(10°O<
77L<10> The agrochemical molded article according to claim 1, which mainly consists of a storeroom having a composition shown by 77L<10>. The water-absorbing and swelling resin fine powder has a water-absorbing power more than 100 times its own weight, and its size after swelling is larger than a 32-mesh sieve;'! F1σ box a4 of d thousand claims
The agricultural chemical molded article according to item 1. 5. The pesticide has 51m properties.'i! ri7(
The agricultural chemical molded rhinoceros according to item 1 of 'Ij'tJ Request. 6. An inorganic powder with an average diameter of 100 μm or less, which is mainly composed of uncombined flakes with curved surfaces, is impregnated with a liquid containing 44, and then soaked in 1,000 ml of early lambda chestnuts or 1, water) and a wettable resin. A method for manufacturing a pesticide molded body, the main steps of which are mixing and molding fine powder. 7. The method according to claim 6, wherein the molding is performed by compression molding under a pressure of 30 to 1 ook kg/i. 8.Claim C11 in which the agricultural chemical is deliquescent
The method described in item 1146 of λ1. 9.7. After impregnating the lrM body containing Kensai, water jTi
6. The method according to claim 6, wherein the method is dried until the amount of : is less than 7%.