JPS615001A - Agricultural chemical composition for application - Google Patents

Abstract

PURPOSE:The titled composition for preventing scattering of an agricultural chemical component to other areas by the influence of wind, etc. in application, having improved adhesivity to plants, obtained by blending the agricultural chemical component with a synthetic resin emulsion of specific kinds of monomers. CONSTITUTION:An agricultural chemical is blended with a synthetic resin emulsion obtained by subjecting (A) one or more of unsaturated monocarboxylic acid ester, dicarboxylic acid diesters and fatty acid vinyl, (B) one or more of polymerizable monomers containing methylol group, hydroxyl group, amino group or amido group which may be replaced with carboxyl group, glycidyl group, or alkyl, and (C) one or more of polymerizable monomers containing vinyl group, allyl group or methallyl group and sulfonic group in the molecule, to give an agricultural chemical composition for application that is easily applicable by ordinary scattering tool, attaching surely to plants, having neither scattering nor washing away caused by rain and wind, showing long-period durability of its effect on plants in the case of a volatile agricultural chemical, etc.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a composition for spraying, and in particular, by mixing pesticide components with a synthetic resin emulsion having a specific composition, the pesticide components can be dispersed during spraying. The purpose is to prevent the pesticide components from being dispersed to other areas due to the influence of wind, etc., and to fix the pesticide components on the plants.

(Conventional technology) Pesticides such as powders tend to scatter due to the influence of wind etc. into nearby fields, houses, livestock ponds, etc. other than the intended site.
Such scattering of pesticides not only causes economic disadvantage in the form of losses, but also has a negative impact on the surrounding environment, and also causes a lack of sufficient pest control effects. As a solution to this problem, attempts have been made to formulate the powder into fine granules or granules, but if the powder is made into granules, naturally the adhesion to plants will be significantly reduced, and wind and rain It is easily washed away and scattered due to such reasons, and in this case, there is also a disadvantage that a sufficient pest control effect cannot be obtained.

On the other hand, insecticides, fungicides, repellents, and other fumigants that vaporize through evaporation or sublimation are formulated into granules in order to maintain their effects evenly over a relatively long period of time rather than temporarily. It is also already known that the formulated granules are placed on appropriate parts of the plant at appropriate heights so that they will not be easily washed away or scattered by wind and rain. Therefore, ensuring stable adhesion is an important issue.

(Structure of the Invention) The present inventors have conducted intensive studies in consideration of the disadvantages of conventional methods, and have found that a mixture of a specific synthetic resin emulsion described later is easy to spray with a general spraying device, and does not adhere to plants. is reliable, and there is no scattering or washing away due to wind and rain.
Furthermore, the present invention was completed by confirming that the effects of vaporizable agricultural chemicals are sustained on plants for a long period of time.

The agricultural chemicals targeted by the present invention include those in various forms such as powder, granules, liquid, and even those formulated in advance for sustained release, and the active ingredients of drug a. There are no particular restrictions on the agents, and generally examples include insecticides, fungicides, nematicides, herbicides, rodenticides, plant growth regulators, repellents, attractants, and pesticides.

Next, the synthetic resin emulsion used in the present invention is (
(b) One or more types of esters of unsaturated monocarboxylic acids, diesters of unsaturated dicarboxylic acids, and vinyl fatty acids, (b) Carboxyl groups, glycidyl groups, methylol groups with or without alkyl substitution, hydroxyl groups, amino groups or one or more polymerizable monomers having an amide group, and one or more polymerizable monomers having a vinyl group, an allyl group, or a metaallyl group, and a sulfonic acid group in the molecule, or a salt thereof. It is obtained by emulsion copolymerization of one species or two or more species, and the above-mentioned effects can be achieved by mixing this with various agricultural chemicals.

Monomers corresponding to component (a) include methyl, ethyl, propyl, 1-propyl, n-butyl, 1-butyl, t-butyl, hexyl, cyclohexyl, 2-ethylhexyl, acrylic acid and methacrylic acid; Esters such as lauryl, stearyl, oleyl, ethoxyethyl mana or benzyl, diesters of the above-mentioned ester-forming components of unsaturated dicarboxylic acids such as maleic acid, fumaric acid and itaconic acid, and acetic acid, propionic acid, lauric acid and stearin. Examples include vinyl esters of acids and fatty acids such as versatic acid.

In addition, monomers corresponding to (mouth) components include acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid,
Itaconic acid and monoalkyl esters of unsaturated dicarboxylic acids such as maleic anhydride, maleic acid, fumaric acid, glycidyl acrylate, glycidyl acrylate,
Allyl glycidyl ether, 2-hydroxyacrylate, 2-hydroxyacrylate, 2-hydroxypropyl methacrylate, polyethylene glycol monoacrylate, 3-chloro-2-hydroxypropyl methacrylate, acrylamide, methacrylamide, +V-
Ethoxymethylacrylamide, 1-mer methylolacrylamide, dimethylaminoethyl methacrylate,
Examples include diethylaminoethyl acrylate.

Furthermore, monomer components corresponding to component (iii) include 1-nylsulfonic acid, 3-allyloxy-2-hydroxypropanesulfonic acid, styrenesulfonic acid, sulfoethyl methacrylate, 2-acrylamido-2-methylpropanesulfonic acid, Examples include allylsulfonic acid, allylargylsulfosuccinate, methalylsulfonic acid, p-methallyloxybenzenesulfonic acid, and their sodium salts, potassium salts, or ammonium salts.

Each monomer of component (a), component (b) and component ()1) described above may be used alone or in combination of two or more.

The proportions of the above components used during emulsion copolymerization may be (a) 99 to 70% by weight of component, (b) component 0.5 to 15% by weight, and () 1) component 05 to 15% by weight. desirable. The emulsion copolymerization method may be a general method, and various anionic, nonionic, and cationic surfactants are used as emulsifiers, and potassium persulfate, ammonium persulfate, hydrogen peroxide, or A redox catalyst containing a combination of these peroxides and a reducing agent is used. In addition, a chain transfer agent or a chain transfer agent may be added to the emulsion polymerization system as necessary.
Polymerization aids commonly used in emulsion polymerization (1) such as buffers and inorganic salts may be added.

The emulsion copolymer emulsion thus obtained has a solid content, that is, a Tg of the polymer component ranging from 110°C to 160°C.
It is desirable that the temperature is 0.degree. C., and if the above-mentioned proportions of each component used and the range of 'rg are out of range, the desired adhesion force (adhesive force) may not be exhibited. In addition, when this emulsion copolymerization emulsion is mixed with agricultural chemicals, it is preferable that the solid content concentration is 5% by weight or more. If it is less than this, the viscosity of the spraying liquid will not be sufficient and the dispersion stability of the agricultural chemicals will decrease, resulting in the spraying. Trouble may occur during this process, or the pesticide may not be able to adhere to the plant. Although there are no particular restrictions on the nH of the emulsion copolymerization emulsion, it is desirable to use it within a range that does not cause phytotoxicity to plants, that is, within the range of pH 5 to 8.

Regarding the mixing ratio of agricultural chemicals and synthetic resin emulsion,
The appropriate ratio is determined by the type and form of the pesticide as well as the type of synthetic resin emulsion, solid content concentration, etc., so this cannot be discussed uniformly, but usually pesticide 1
Solid content of synthetic resin emulsion 0.2 to 2 parts by weight
It is desirable that the water component be in the range of 1 to 20 parts by weight.

In addition, a thickener such as water-soluble cellulose ether, polyvinyl alcohol, polyacrylic acid, etc. may be used in combination with the synthetic resin emulsion for the purpose of further improving adhesion and adhesion.

The method of spraying the agrochemical composition of the present invention may be any suitable method such as mechanical spraying or indoor spraying depending on the application site, scale, etc., and there are no particular restrictions on the spraying means. Furthermore, since the composition according to the present invention is an aqueous liquid, it can be easily sprayed using a simple general sprayer such as a backpack type sprayer equipped with a driving force and a discharge nozzle, and is easy to handle even for ordinary farmers. It's not a struggle.

Next, two specific examples will be given.

Example 1 A synthetic resin emulsion was produced as follows.

Synthetic resin emulsion (1): In a reaction vessel equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen gas introduction tube, 2-ethyl acrylate 701E parts Hexyl vinyl acetate 2o Methacrylic acid 9 Sodium lauryl sulfate o, 5 Ammonium persulfate
o, 2 water 1
oo 〃 and stirred in a nitrogen stream for 70 minutes.
An emulsion copolymerization reaction was carried out at 'C for 6 hours. The mixture was then cooled and adjusted to a pH value of 6 to 7 with aqueous ammonia to obtain a stable synthetic resin emulsion free of coarse particles.

This has a solid content of 50%, p) T6.2, and a viscosity of 2.
00 centipoise (25°C, Brookfield viscometer), TK value -38.3°C.

Next, prepare a granule with an average particle size of 0.4 am and use it as an active ingredient of diazinon as a pesticide, and mix 100 parts by weight of this with 100 parts by weight of the above synthetic resin emul 017 and 500 parts by weight of water to prepare a pesticide for spraying. A composition was prepared.

This agrochemical composition was applied to a backpack-type power sprayer (P) manufactured by Kyoritsu Co., Ltd.
D-703E-13) and sprayed from a distance of 2 m onto a polyethylene sheet measuring lm x 1 m fixed at an angle of 45° from the horizontal, and the number of diazinon granules adhering to the polyethylene sheet and the adhesion rate were measured. The adhesion rate at the time of spraying was determined from the number of drops that fell without falling.

Adhesion rate during spraying -- When water was sprinkled for 1 hour or 3 hours under the condition of /min·d, the number of remaining particles attached to the initial number of particles attached was examined, and the adhesion rate after watering was determined.

a′ Adhesion rate after watering = −x loo (%) b′ a′: Number of adhered granules after watering b': Number of adhered granules before watering The results were as follows.

Adhesion rate after watering: 99% Adhesion rate after watering 1 hour after watering: 98% 3 hours after watering: 96% Examples 2 to 6 Synthetic resins having the following composition and properties in the same manner as synthetic resin emulsion (1) Emulsion (2) ~ (6
) was obtained.

Synthetic resin emulsion (2): (Monomer composition) Methyl methacrylate 10/l Glycidyl acrylate 5 // (Properties) Solid content = 52%, p) (=6.8, Viscosity = 100 centipoise (25) ℃), Tg=--50
, 6°C Synthetic resin emulsion (3): (Monomer charge composition) Butyl acrylate 64 parts by weight Methyl methacrylate 32 parts by weight methacrylic acid
3 Sodium acid (properties) Solid content -50%, p) (=5.2, Viscosity=350 centipoise (25℃), Tg=-14,
8℃ Synthetic resin emulsion (4): (Medium 11 composition) Acrylic acid 6〃(Properties) 1 block = 51%, pH = 6.2, viscosity = 400 centipoise (25℃) '1'g --60℃ Synthetic resin emulsion (5): (Monomer charging composition) Vinyl acetate 16 Methacrylic acid
7 Ll Sodium vinyl sulfonate 7/(Properties) Solid content = 48%, pH = 6.3, Viscosity: 300 centipoise (25°C), Tg = -40,
4℃ Synthetic resin emulsion (6): (Monomer preparation composition) Butyl acrylate 99 parts by weight acrylic acid
05 Thorium (Properties) Solid content: 49%, pH = 6.6, viscosity = 50 centipoise (25°C), Tg = -54°C Next, diazinon granules 100 similar to those used in Example 1
Each part by weight was mixed with 100 parts by weight of any of the above synthetic resin emulsions and 500 parts by weight of water to prepare each composition. The adhesion rate after spraying (%) and the adhesion rate after watering (%) (1 hour after watering and 3 hours after watering) were measured for these in the same manner as in Example 1, and the results shown in Table 1 were obtained. It was done.

Table 1 Comparative Example 1 In Example 1, a vinyl acetate resin emulsion [manufactured by Konishi Co., Ltd., Bond C!] was used instead of the synthetic resin emulsion (1). Spraying experiments were conducted in the same manner except that H-18) was used at the same rate. The adhesion rate at the time of spraying was 98%, but the adhesion rate after 1 hour of watering was as low as 22%, and the adhesion rate after 3 hours of watering was only 1%, meaning most of it fell off or was washed away, indicating sufficient adhesion. did not show.

Example 7 The composition prepared in Example 1, consisting of diazinon granules and synthetic resin emulsion (1), was sprayed on an apple tree with 4 m of resin, and the residual adhesion rate (%) after 1 month was investigated. Ta. Although there were 5 days of rain during this test period, the adhesion rate after being left for one month was 88%, indicating good adhesion performance.

Comparative Example 2 The same spray composition as in Comparative Example 1 was sprayed on apple trees in parallel with the test in Example 7, and the residual adhesion rate after one month was examined. The adhesion rate after the first rainy day is already low at 38%.
After leaving it for one month, most of it fell off and did not show sufficient adhesion.

Claims (1)

[Claims] 1. Pesticide component and (a) unsaturated carboxylic acid ester,
Polymerizable monomer having one or more diesters of unsaturated dicarboxylic acids and vinyl fatty acids, (b) carboxyl group, glycidyl group, alkyl-substituted or non-alkyl-substituted methylol group, hydroxyl group, amino group, or amide group and (iii) emulsion copolymerization of one or more polymerizable monomers having a vinyl group, an allyl group, or a metaallyl group, and a sulfonic acid group or their salts in the molecule. A pesticide composition for spraying consisting of a synthetic resin emulsion obtained by