Fertilizer composition, coated fertilizer, use method of resin composition, cultivation method, and culture soil

Abstract

To provide a novel fertilizer composition in which elution of a fertilizer component to water in the soil is controlled and a longtime fertilizing effect can be expected.SOLUTION: A fertilizer composition includes a reactant. The reactant consists of a reactive component including a polymer (A) containing a structural unit (a1) derived from an unsaturated compound having a primary and / or a secondary amid group, urea (B), and aldehyde (C).SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a fertilizer composition, a coated fertilizer, a method for using a resin composition, a cultivation method, and a potting soil. [Background technology]

[0002] Slow-release fertilizers that control the leaching of fertilizer components have been proposed to reduce labor costs associated with the aging of agricultural workers and to reduce the environmental impact of fertilizer component runoff. Slow-release fertilizers prevent excessive application of fertilizer components and increase the efficiency of fertilizer component use in crops, leading to a reduction in the number of fertilizer applications and further reducing excessive runoff of fertilizer components into rivers, etc.

[0003] Slow-release fertilizers are required to be resistant to dissolving into soil water immediately after application in order to continuously supply fertilizer components to crop roots while suppressing the runoff of fertilizer components. Various forms of slow-release fertilizers have been put into practical use, and among them, coated granular fertilizers, which have a resin coating on the surface of the granular fertilizer to control the dissolution of the fertilizer components inside, are widely used (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 60-21952 [Patent Document 2] Japanese Patent Application Publication No. 9-202683 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in some conventional slow-release fertilizers, the elution of fertilizer components in the soil is not sufficiently controlled, and there is a demand for slow-release fertilizers that can be expected to have a long-term fertilizer effect by sustained elution of fertilizer components.

[0006] An object of the present invention is to provide a novel fertilizer composition in which the elution of fertilizer components into water in soil is controlled and which can be expected to have a long-term fertilizer effect. [Means for solving the problem]

[0007] As a result of extensive research, the present inventors have found that the above-mentioned problems can be solved by a fertilizer composition containing a reaction product obtained by reacting urea, an aldehyde, and a specific polymer.

[0008] The present disclosure provides the following:

[0009] (Item 1) a fertilizer composition, The fertilizer composition comprises a reactant: The reactant is a reaction product of a polymer (A) including a structural unit (a1) derived from an unsaturated compound containing a primary and / or secondary amide group, and reaction components including ureas (B) and aldehydes (C). Fertilizer composition.

[0010] (Item 2) 2. The fertilizer composition according to Item 1, wherein the weight average molecular weight of component (A) is 6,000,000 or less.

[0011] (Item 3) 3. The fertilizer composition according to item 1 or 2, wherein component (A) comprises at least one structural unit selected from the group consisting of structural units (a2) derived from hydroxyl group-containing unsaturated compounds and structural units (a3) ​​derived from carboxyl group-containing unsaturated compounds.

[0012] (Item 4) 4. The fertilizer composition according to Item 3, wherein the total amount of the structural units (a1), (a2), and (a3) ​​in the component (A) is 20 mol% or more, based on 100 mol% of the component (A).

[0013] (Item 5) A coated fertilizer comprising the fertilizer composition according to any one of items 1 to 4 and a coating film that coats the fertilizer composition, The coating includes a resin. Coated fertilizer.

[0014] (Item 6) 6. The coated fertilizer according to item 5, wherein the resin comprises a biodegradable resin.

[0015] (Item 7) A method for using a resin composition containing a reactant as a fertilizer, comprising: The reactant is a reaction product of a polymer (A) containing a structural unit derived from an unsaturated compound containing a primary and / or secondary amide group, and reaction components including ureas (B) and aldehydes (C). Method of using the resin composition.

[0016] (Item 8) 8. The method for using the resin composition according to item 7, wherein the weight average molecular weight of component (A) is 6,000,000 or less.

[0017] (Item 9) Item 9. The method for using a resin composition according to Item 7 or 8, wherein the component (A) includes at least one structural unit selected from the group consisting of a structural unit (a2) derived from a hydroxyl group-containing unsaturated compound and a structural unit (a3) ​​derived from a carboxyl group-containing unsaturated compound.

[0018] (Item 10) Item 10. The method for using a resin composition according to Item 9, wherein the total amount of the structural units (a1), (a2), and (a3) ​​in the component (A) is 20 mol% or more, based on 100 mol% of all structural units in the component (A).

[0019] (Item 11) A cultivation method for growing plants in soil, A cultivation method comprising blending the fertilizer composition according to any one of items 1 to 4 or the coated fertilizer according to item 5 or 6 into the soil.

[0020] (Item 12) A culture medium comprising soil and the fertilizer composition according to any one of items 1 to 4, or the coated fertilizer according to item 5 or 6.

[0021] In the present disclosure, one or more of the above-described features may be provided in further combinations in addition to the combinations explicitly stated. [Effects of the Invention]

[0022] The fertilizer composition provided by the present disclosure can be a slow-release fertilizer that can be expected to have a long-term fertilizer effect because the elution of ureas, which are fertilizer components, into water in the soil is controlled. BEST MODE FOR CARRYING OUT THE INVENTION

[0023] Throughout this disclosure, the range of values ​​for each physical property, content, etc. may be set as appropriate (e.g., by selecting from the values ​​described in each item below). Specifically, when the example of the value α is A3, A2, or A1 (assuming A3 > A2 > A1), the range of the value α may be, for example, A3 or less, A2 or less, less than A3, less than A2, A1 or more, A2 or more, greater than A1, greater than A2, A1 to A2 (A1 or more and less than A2), A1 to A3, A2 to A3, A1 or more and less than A3, A1 or more and less than A2, A2 or more and less than A3, greater than A1 and less than A3, greater than A1 and less than A2, greater than A2 and less than A3, greater than A1 and less than A3, greater than A1 and less than A2, greater than A2 and less than A3, greater than A1 and less than A3, greater than A1 and less than A2, greater than A2 and less than A3, and greater than A1 and less than A3. In this disclosure, the symbol "to" is used to mean that the values ​​before and after it are both upper and lower limits. The components and manufacturing methods of this disclosure are described in detail below.

[0024] As long as the object of the present invention is achieved, there are no particular limitations on the components, conditions, values, etc.

[0025] "Non-volatile content" refers to the total mass of components other than organic solvents and water. In one embodiment, "non-volatile content of A" refers to the total mass of components remaining when 1 g of A is heated at 105°C and reaches a constant weight.

[0026] "(Meth)acrylic" means "acrylic and / or methacrylic". "(Meth)acrylate" means "acrylate and / or methacrylate". "(Meth)acryloyl" means "acryloyl and / or methacryloyl". "(Meth)allyl" means "allyl and / or methallyl".

[0027] "Poly(meth)acrylate" means a compound having two or more (meth)acryloyl groups.

[0028] [Fertilizer composition] The present disclosure relates to a fertilizer composition comprising a polymer (A) (hereinafter also referred to as component (A)) containing a structural unit (a1) derived from an unsaturated compound containing a primary and / or secondary amide group, and a reaction product (hereinafter also referred to as simply reactant) of reaction components (hereinafter also referred to as simply reactant) including ureas (B) (hereinafter also referred to as component (B)) and aldehydes (C) (hereinafter also referred to as component (C)).

[0029] <Polymer (A)> The component (A) is not particularly limited, and various known polymers can be used as long as they contain a structural unit (a1) (hereinafter also referred to as structural unit (a1)) derived from an unsaturated compound containing a primary and / or secondary amide group. One type of component (A) may be used alone, or two or more types may be used in combination.

[0030] <Structural Unit (a1) Derived from an Unsaturated Compound Containing a Primary and / or Secondary Amide Group> The structural unit (a1) is a structural unit contained in a polymer chain when a polymer is produced using an unsaturated compound (a1') containing a primary and / or secondary amide group (hereinafter also referred to as component (a1')). One type of component (a1') may be used alone, or two or more types may be used in combination.

[0031] The component (a1') is not particularly limited, and any known compound can be used as long as it has at least one polymerizable carbon-carbon double bond in the molecule and at least one primary amide group and / or secondary amide group in the molecule.

[0032] In the present disclosure, the "polymerizable carbon-carbon double bond" includes, for example, a (meth)acryloyl group, a 1-propenyl group (hereinafter also referred to as an allyl group), a 2-methyl-1-propenyl group (hereinafter also referred to as a methallyl group), an isopropenyl group, a vinyl group, and the like.

[0033] In the present disclosure, the term "primary amide group" refers to an amide group in which the two hydrogen atoms directly bonded to the nitrogen atom of the amide group are not substituted in any way. The general formula of a "primary amide group" is shown below. [ka] (In the formula, R represents a substituent containing a polymerizable carbon-carbon double bond.)

[0034] In the present disclosure, the term "secondary amide group" refers to an amide group in which one hydrogen atom directly bonded to the nitrogen atom of a primary amide group has been substituted with a substituent. The general formula of a "secondary amide group" is shown below. [ka] (In the formula, R and R′ represent substituents, and at least one of R and R′ is a substituent containing a polymerizable carbon-carbon double bond.)

[0035] Component (A) contains the structural unit (a1), which allows it to react with component (C). The resulting reaction product then reacts (condenses) with the reaction product of components (B) and (C), thereby obtaining the above-mentioned reaction product. By including component (A) as a reactive component, the above-mentioned reaction product controls the leaching of component (B) into soil water in a fertilizer composition containing it.

[0036] Examples of the component (a1') include a (meth)acryloyl group-containing compound having at least one primary and / or secondary amide group in the molecule, a (meth)allyl group-containing compound having at least one primary and / or secondary amide group in the molecule, and a vinyl group-containing compound having at least one primary and / or secondary amide group in the molecule.

[0037] Examples of the (meth)acryloyl group-containing compound include (meth)acrylamide, N-monosubstituted (meth)acrylamide, and polyfunctional (meth)acrylamide.

[0038] In the present disclosure, "N-monosubstituted (meth)acrylamide" means a compound in which one hydrogen atom directly bonded to the nitrogen atom of (meth)acrylamide has been substituted with any substituent.

[0039] In the present disclosure, "polyfunctional (meth)acrylamide" means a compound having at least two (meth)acrylamide groups in the molecule.

[0040] Examples of the N-monosubstituted (meth)acrylamide include N-methyl(meth)acrylamide, N-ethyl(meth)acrylamide, N-propyl(meth)acrylamide, N-isopropyl(meth)acrylamide, N-methylol(meth)acrylamide, N-hydroxyethyl(meth)acrylamide, diacetone(meth)acrylamide, N,N-dimethylaminomethyl(meth)acrylamide, N,N-dimethylaminoethyl(meth)acrylamide, N,N-diethylaminomethyl(meth)acrylamide, N,N-diethylaminoethyl(meth)acrylamide, N,N-dimethylaminopropyl(meth)acrylamide, N,N-diethylaminopropyl(meth)acrylamide, 3-dimethylamino-2-hydroxypropyl(meth)acrylamide, and 3-diethylamino-2-hydroxypropyl(meth)acrylamide.

[0041] Examples of the polyfunctional (meth)acrylamide include N,N'-methylenebis(meth)acrylamide, N,N'-ethylenebis(meth)acrylamide, N,N'-propylenebis(meth)acrylamide, N,N'-butylenebis(meth)acrylamide, N-[tris(3-(meth)acrylamidopropoxymethyl)methyl](meth)acrylamide, N,N-bis(2-(meth)acrylamidoethyl)(meth)acrylamide, N,N-[oxybis(2,1-ethanediyloxy-3,1-propanediyl)]bis(meth)acrylamide, and N,N-1,2-ethanediylbis{N-[2-((meth)acryloylamino)ethyl](meth)acrylamide}.

[0042] The vinyl group-containing compound may, for example, be N-vinylacetamide.

[0043] In one embodiment, the component (a1') is preferably the above-mentioned (meth)acryloyl group-containing compound, more preferably (meth)acrylamide or N-monosubstituted (meth)acrylamide, and even more preferably (meth)acrylamide, in order to control the leaching of the component (B) into water in the soil.

[0044] (Structural unit (a2) derived from a hydroxyl group-containing unsaturated compound) In one embodiment, the component (A) may optionally include a structural unit (a2) derived from a hydroxyl group-containing unsaturated compound (hereinafter also referred to as structural unit (a2)).

[0045] The structural unit (a2) is a structural unit contained in a polymer chain when a polymer is produced using a hydroxyl group-containing unsaturated compound (a2') (hereinafter also referred to as component (a2')). One type of component (a2') may be used alone, or two or more types may be used in combination.

[0046] By including the structural unit (a2), component (A) has more reactive sites with component (C), thereby improving reactivity. Therefore, in a fertilizer composition containing the above-mentioned reaction product obtained from component (A) containing structural unit (a2), the elution of component (B) into soil water is more controlled.

[0047] The component (a2') is not particularly limited as long as it is a compound having at least one polymerizable carbon-carbon double bond and at least one hydroxyl group in the molecule, and various known compounds can be used.

[0048] Examples of the component (a2') include hydroxyl group-containing (meth)acrylates, hydroxyl group-containing vinyl ethers, and hydroxyl group-containing allyl ethers.

[0049] Examples of the hydroxyl group-containing (meth)acrylate include hydroxyethyl (meth)acrylate, 1-hydroxypropyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxy-1-methylethyl (meth)acrylate, 1-hydroxy-2-methylethyl (meth)acrylate, 1-hydroxybutyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 3-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 2-hydroxy-2-methylpropyl (meth)acrylate, and 1-hydroxy-1- Examples of such acrylates include methylpropyl (meth)acrylate, 3-hydroxy-1-methylpropyl (meth)acrylate, 1-ethyl-2-hydroxyethyl (meth)acrylate, 1-hydroxy-2-methylpropyl (meth)acrylate, 2-hydroxy-2-methylpropyl (meth)acrylate, 3-hydroxy-2-methylpropyl (meth)acrylate, 1,1-dimethyl-2-hydroxyethyl (meth)acrylate, hydroxypentyl (meth)acrylate, glycerin mono(meth)acrylate, and polyalkylene glycol mono(meth)acrylate.

[0050] Examples of the polyalkylene glycol mono(meth)acrylate include polymethylene glycol mono(meth)acrylate, polyethylene glycol mono(meth)acrylate, and polypropylene glycol mono(meth)acrylate.

[0051] Examples of the hydroxyl group-containing vinyl ether include hydroxyalkyl vinyl ether and polyalkylene glycol monovinyl ether.

[0052] Examples of the hydroxyalkyl vinyl ether include 2-hydroxyethyl vinyl ether, 3-hydroxypropyl vinyl ether, 4-hydroxybutyl vinyl ether, 5-hydroxypentyl vinyl ether, 2-hydroxypropyl vinyl ether, 2-hydroxy-2-methylpropyl vinyl ether, 4-hydroxy-2-methylbutyl vinyl ether, and 4-hydroxycyclopentyl vinyl ether.

[0053] Examples of the polyalkylene glycol monovinyl ether include polymethylene glycol monovinyl ether, polyethylene glycol monovinyl ether, and polypropylene glycol monovinyl ether.

[0054] Examples of the hydroxyl group-containing allyl ether include 3-allyloxy-1,2-propanediol and glycerol α-monoallyl ether.

[0055] In one embodiment, the component (a2') is preferably the above-mentioned hydroxyl group-containing (meth)acrylate, and more preferably at least one selected from the group consisting of hydroxyethyl (meth)acrylate, 1-hydroxypropyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, and 1-hydroxybutyl (meth)acrylate, in order to control the elution of the component (B) into water in the soil.

[0056] (Structural Unit (a3) ​​Derived from a Carboxyl Group-Containing Unsaturated Compound) In one embodiment, the component (A) may optionally include a structural unit (a3) ​​derived from a carboxyl group-containing unsaturated compound (hereinafter also referred to as structural unit (a3)).

[0057] The structural unit (a3) ​​is a structural unit contained in a polymer chain when a polymer is produced using a carboxyl group-containing unsaturated compound (a3') (hereinafter also referred to as component (a3')). One type of component (a3') may be used alone, or two or more types may be used in combination.

[0058] By including the structural unit (a3), component (A) has more reactive sites with component (C) and can also react with component (B), further improving its reactivity. Therefore, in a fertilizer composition containing the above-mentioned reaction product obtained from component (A) containing structural unit (a3), the leaching of component (B) into soil water is more controlled.

[0059] The component (a3') is not particularly limited as long as it is a compound having at least one polymerizable carbon-carbon double bond and at least one carboxyl group in the molecule, and various known compounds can be used.

[0060] Examples of the component (a3') include α,β-unsaturated monocarboxylic acids such as (meth)acrylic acid and crotonic acid; α,β-unsaturated dicarboxylic acids such as maleic acid, maleic anhydride, fumaric acid, itaconic acid, citraconic acid and citraconic anhydride; and salts thereof.

[0061] Examples of salts in component (a3') include alkali metal salts such as lithium salts, sodium salts, and potassium salts, ammonium salts, and amine salts such as methylamine and ethanolamine.

[0062] In one embodiment, the component (a3') is preferably at least one selected from the group consisting of (meth)acrylic acid, maleic acid, maleic anhydride, fumaric acid, and itaconic acid, from the viewpoint of controlling the elution of the component (B) into water in the soil, and more preferably (meth)acrylic acid.

[0063] (Structural units (a4) derived from other unsaturated compounds) In one embodiment, the component (A) may optionally include a structural unit (a4) derived from another unsaturated compound (hereinafter also referred to as structural unit (a4)), as long as the effects of the present disclosure are not impaired.

[0064] The structural unit (a4) is a structural unit contained in a polymer chain when a polymer is produced using another unsaturated compound (a4') (hereinafter also referred to as component (a4')). One type of component (a4') may be used alone, or two or more types may be used in combination.

[0065] The component (a4') is not particularly limited as long as it is a compound other than the components (a1'), (a2'), and (a3') that has at least one polymerizable carbon-carbon double bond in the molecule, and various known compounds can be used.

[0066] Examples of salts in component (a4') include alkali metal salts such as lithium salts, sodium salts, and potassium salts, ammonium salts, and amine salts such as methylamine and ethanolamine.

[0067] Examples of component (a4') include tertiary amide group-containing unsaturated compounds, sulfonic acid group-containing unsaturated compounds, phosphoric acid group-containing unsaturated compounds, tertiary amino group-containing unsaturated compounds, quaternary amino group-containing unsaturated compounds, alkyl (meth)acrylates, alkoxyalkyl (meth)acrylates, vinyl carboxylic acid esters, unsaturated dicarboxylic acid alkyl esters, α-olefins, alkyl vinyl ethers, conjugated dienes, α,β-unsaturated nitriles, aromatic vinyl compounds, crosslinkable unsaturated compounds, and reactive emulsifiers.

[0068] Examples of the tertiary amide group-containing unsaturated compound include (meth)acryloylmorpholine and N-disubstituted (meth)acrylamide.

[0069] In the present disclosure, "N-disubstituted (meth)acrylamide" means a compound in which two hydrogen atoms directly bonded to the nitrogen atom of (meth)acrylamide have been substituted with some substituents.

[0070] Examples of the N-disubstituted (meth)acrylamides include N,N-dimethyl(meth)acrylamide, N,N-diethyl(meth)acrylamide, and N,N-dipropyl(meth)acrylamide.

[0071] The sulfonic acid group-containing unsaturated compound is not particularly limited as long as it has one polymerizable carbon-carbon double bond in the molecule and at least one sulfonic acid group in the molecule, and various known compounds can be used.

[0072] Examples of the sulfonic acid group-containing unsaturated compound include (meth)allylsulfonic acid, styrenesulfonic acid, vinylsulfonic acid, 2-(meth)acrylamido-2-methylpropanesulfonic acid, (meth)acrylamido tertiary butylsulfonic acid, sulfoethyl (meth)acrylate, sulfopropyl (meth)acrylate, and salts thereof.

[0073] The phosphate group-containing unsaturated compound is not particularly limited as long as it has one polymerizable carbon-carbon double bond in the molecule and at least one phosphate group in the molecule, and various known compounds can be used.

[0074] Examples of the phosphate group-containing unsaturated compound include mono[2-hydroxyethyl(meth)acrylate] acid phosphate, mono[2-hydroxypropyl(meth)acrylate] acid phosphate, mono[3-hydroxypropyl(meth)acrylate] acid phosphate, mono[3-chloro-2-hydroxypropyl(meth)acrylate] acid phosphate, (meth)allyl alcohol acid phosphate and mono[2-hydroxyethyl(meth)acrylate] acid phosphite, bis((meth)acryloxyethyl)phosphate, diphenyl-2-(meth)acryloyloxyethyl phosphate, dibutyl-2-(meth)acryloyloxyethyl phosphate, dioctyl-2-(meth)acryloyloxyethyl phosphate, monomethyl-2-(meth)acryloyloxyethyl phosphate, 3-(meth)acryloxy-2-hydroxypropanephosphoric acid, and salts thereof.

[0075] The tertiary amino group-containing unsaturated compound is not particularly limited as long as it is a compound having one polymerizable carbon-carbon double bond and one tertiary amino group in the molecule, and various known compounds can be used.

[0076] Examples of the tertiary amino group-containing unsaturated compound include N,N-dimethylaminomethyl (meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate, N,N-diethylaminomethyl (meth)acrylate, N,N-diethylaminoethyl (meth)acrylate, N,N-dimethylaminopropyl (meth)acrylate, N,N-diethylaminopropyl (meth)acrylate, 3-diethylamino-2-hydroxypropyl (meth)acrylate, 3-(N',N'-dimethylamino-N-methylamino)-2-hydroxypropyl (meth)acrylate, 3-allyloxy-2-hydroxypropyldimethylamine, vinylbenzyldimethylamine, and 4-(vinylbenzyl)morpholine.

[0077] The quaternary amino group-containing unsaturated compound is not particularly limited as long as it is a quaternary amino group-containing unsaturated compound obtained by reacting the tertiary amino group-containing unsaturated compound with a quaternizing agent, and various known compounds can be used.

[0078] The quaternizing agent is not particularly limited. Examples of the quaternizing agent include oxides, organic halides, dimethyl sulfate, diethyl sulfate, etc. Examples of the oxides include alkylene oxides such as ethylene oxide, propylene oxide, and butylene oxide; styrene oxide, etc. Examples of the organic halides include methyl halides, ethyl halides, benzyl halides, epihalohydrin, glycidyl trimethyl ammonium halide, and 3-chloro-2-hydroxyammonium halide. The quaternizing agent may be used alone or in combination of two or more.

[0079] Examples of the alkyl (meth)acrylate include (meth)acrylic acid alkyl esters in which the alkyl group has a carbon number of 1 to 20. Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, a normal butyl group, an isobutyl group, a tertiary butyl group, a normal octyl group, a 2-ethylhexyl group, a nonyl group, a decyl group, a dodecyl group, a hexadecyl group, an octadecyl group, an octadecenyl group, a docosyl group, a cyclopentyl group, and a cyclohexyl group.

[0080] The alkoxyalkyl (meth)acrylate is not particularly limited as long as it is a compound having one (meth)acryloyl group and at least one alkoxyalkyl group in the molecule, and various known compounds can be used.

[0081] Examples of the alkoxyalkyl (meth)acrylate include methoxymethyl (meth)acrylate, 2-methoxyethyl (meth)acrylate, 1-methoxyethyl (meth)acrylate, 3-methoxypropyl (meth)acrylate, 2-methoxypropyl (meth)acrylate, 1-methoxypropyl (meth)acrylate, 4-methoxybutyl (meth)acrylate, 3-methoxybutyl (meth)acrylate, 2-methoxybutyl (meth)acrylate, and 1-methoxybutyl (meth)acrylate, ethoxymethyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, 1-ethoxyethyl (meth)acrylate, 3-ethoxypropyl (meth)acrylate, 2-ethoxypropyl (meth)acrylate, 1-ethoxypropyl (meth)acrylate, propoxymethyl (meth)acrylate, 2-propoxyethyl (meth)acrylate, 1-propoxyethyl (meth)acrylate, butoxymethyl (meth)acrylate, and the like.

[0082] Examples of the vinyl carboxylate include vinyl acetate, vinyl propionate, and vinyl laurate.

[0083] Examples of the unsaturated dicarboxylic acid alkyl ester include monoalkyl esters and dialkyl esters of the above α,β-unsaturated dicarboxylic acids. Examples of the alkyl group include methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tertiary butyl, n-octyl, 2-ethylhexyl, nonyl, decyl, dodecyl, hexadecyl, octadecyl, octadecenyl, docosyl, cyclopentyl, and cyclohexyl groups.

[0084] Examples of the α-olefin include α-olefins in which the alkyl group has a carbon number of 6 to 22. Examples of the α-olefin include 2,4,4-trimethylpentene-1, 3-methyl-1-butene, 3-methyl-1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, 1-eicosene, 1-tetracosene, 1-triacontene, cyclohexene, methylcyclohexene, vinylcyclohexane, 4-vinylcyclohexene, cyclopentene, and methylcyclopentene.

[0085] Examples of the alkyl vinyl ether include alkyl vinyl ethers in which the alkyl group has 1 to 22 carbon atoms.

[0086] Examples of the conjugated diene include 1,3-butadiene, 2-methyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-chloro-1,3-butadiene, substituted straight-chain conjugated pentadiene, and substituted and side-chain conjugated hexadiene.

[0087] Examples of the α,β-unsaturated nitrile include (meth)acrylonitrile, α-chloro(meth)acrylonitrile, α-ethyl(meth)acrylonitrile, and vinylidene cyanide.

[0088] The aromatic vinyl compound is not particularly limited as long as it has one vinyl group and at least one aromatic group in the molecule, and various known compounds can be used.

[0089] The aromatic groups (aryl groups, arylene groups) may be substituted or unsubstituted. Examples of the substituents of the aromatic groups include linear alkyl groups, branched alkyl groups, cycloalkyl groups, thioalkyl groups, thioaryl groups, and carbonylaryl groups. Examples of the aryl groups include monocyclic aryl groups and fused ring aryl groups. Examples of the monocyclic aryl groups include phenyl groups, tolyl groups, and mesityl groups. Examples of the fused ring aryl groups include naphthyl groups. Examples of the arylene groups include monocyclic arylene groups and fused ring arylene groups. Examples of the monocyclic arylene groups include phenylene groups and tolylene groups. Examples of the fused ring arylene groups include naphthylene groups.

[0090] Examples of the aromatic vinyl compound include styrenes such as styrene, α-methylstyrene, t-butylstyrene, dimethylstyrene, acetoxystyrene, and hydroxystyrene; vinyltoluenes such as vinyltoluene and chlorovinyltoluene; allyltoluenes such as allylbenzene, p-allyltoluene, and o-allyltoluene; vinylnaphthalene; and vinylanthracene.

[0091] The crosslinkable unsaturated compound is not particularly limited as long as it is a compound having at least two polymerizable carbon-carbon double bonds in the molecule, and various known compounds can be used.

[0092] Examples of the crosslinkable unsaturated compound include divinylbenzene, trivinylbenzene, divinyl sulfone, hexanediol di(meth)acrylate, 1,9-nonanediol diacrylate, dicyclopentanyl di(meth)acrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, propylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, 1,3,5-tri((meth)acryloyl)-1,3,5-triazine, 1,3,5-tri(meth)acryloylhexahydro-1,3,5-triazine, ethylene glycol dimethacrylate, dipropylene glycol dimethacrylate, hexaethylene glycol diacrylate, triallyl isocyanurate, triallyl trimellitate, triallylamine, and triallyl(meth)acrylamide.

[0093] The reactive emulsifier is not particularly limited, and various known ones can be used. Examples of the reactive emulsifier include a compound having a polymerizable carbon-carbon double bond, a hydrophobic group, and a polyoxyalkylene group having about 2 to 100 repeating units in the molecule. Note that the reactive emulsifier is not included in component (a2').

[0094] Examples of the hydrophobic group include an alkyl group and the aromatic group.

[0095] Examples of the alkyl group include a linear alkyl group, a branched alkyl group, a cycloalkyl group, and a substituent formed by combining these groups.

[0096] In the present disclosure, a "branched alkyl group" refers to a group that does not have a cyclic structure, in which at least one hydrogen atom of a linear alkyl group is replaced with an alkyl group.

[0097] Examples of the cycloalkyl group include a monocyclic cycloalkyl group, a bridged ring cycloalkyl group, a fused ring cycloalkyl group, etc. A cycloalkyl group in which at least one hydrogen atom of the cycloalkyl group is substituted with an alkyl group is also considered to be a cycloalkyl group.

[0098] In this disclosure, "monocyclic ring" refers to a ring structure formed by a covalent carbon bond and having no internal bridges. "Fused ring" refers to a ring structure in which two or more monocyclic rings share two atoms (i.e., each ring shares only one edge (fused) with another ring). "Bridged ring" refers to a ring structure in which two or more monocyclic rings share three or more atoms.

[0099] Examples of the polyoxyalkylene group include a polyoxyethylene group, a polyoxypropylene group, a polyoxyisopropylene group, a polyoxybutylene group, and block products thereof.

[0100] Examples of the reactive emulsifier include polyoxyethylene alkyl ethers, sulfosuccinate salts of polyoxyethylene alkyl ethers, sulfate salts of polyoxyethylene alkyl ethers, polyoxyethylene phenyl ethers, sulfosuccinate salts of polyoxyethylene phenyl ethers, sulfate salts of polyoxyethylene phenyl ethers, polyoxyethylene alkyl phenyl ethers, sulfosuccinate salts of polyoxyethylene alkyl phenyl ethers, sulfate salts of polyoxyethylene alkyl phenyl ethers, polyoxyethylene aralkyl phenyl ethers, sulfosuccinate salts of polyoxyethylene aralkyl phenyl ethers, sulfate salts of polyoxyethylene aralkyl phenyl ethers, phosphate salts of polyoxyethylene alkyl phenyl ethers; aliphatic or aromatic carboxylate salts of polyoxyethylene alkyl phenyl ethers; acidic phosphate (meth)acrylic acid ester-based emulsifiers; bis(polyoxyethylene polycyclic phenyl ether) methacrylated sulfate ammonium salts; methacryloyloxyethyl sulfonate salts; polyethylene glycol methacrylate esters; and compounds having a polymerizable carbon-carbon double bond.

[0101] The reactive emulsifier may also be any of those described in, for example, JP-A Nos. 63-23725, 63-240931, 62-104802, 4-50204, 4-53802, 4-256429, 9-324394, 2003-293288, and 2010-242280.

[0102] In one embodiment, the component (a4') is preferably at least one selected from the group consisting of a tertiary amide group-containing unsaturated compound, a sulfonic acid group-containing unsaturated compound, and an alkoxyalkyl (meth)acrylate, from the viewpoint of ease of production of the reaction product, and more preferably at least one selected from the group consisting of N-disubstituted (meth)acrylamide, 2-(meth)acrylamido-2-methylpropanesulfonic acid, 2-methoxyethyl (meth)acrylate, and 1-methoxyethyl (meth)acrylate.

[0103] In one embodiment, component (A) preferably includes at least one structural unit selected from the group consisting of structural unit (a2) and structural unit (a3), from the standpoint of controlling the elution of component (B) into water in the soil.

[0104] (Content of each constituent unit) There are no particular limitations on the amount of structural unit (a1) contained in component (A). Examples of the amount of structural unit (a1) contained in component (A), relative to 100% by mass of component (A), include 100%, 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%, 20%, 19%, 18%, 17%, 16%, 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, and 4% by mass. In one embodiment, the content of structural unit (a1) in component (A) is preferably 4 to 100 mass%, more preferably 4 to 90 mass%, and even more preferably 10 to 80 mass%, relative to 100 mass% of component (A), in order to control elution of component (B) into water in soil.

[0105] The content of the structural unit (a1) in the component (A) may, for example, be 100 mol%, 95 mol%, 90 mol%, 85 mol%, 80 mol%, 75 mol%, 70 mol%, 65 mol%, 60 mol%, 55 mol%, 50 mol%, 45 mol%, 40 mol%, 35 mol%, 30 mol%, 25 mol%, 20 mol%, 19 mol%, 18 mol%, 17 mol%, 16 mol%, 15 mol%, 14 mol%, 13 mol%, 12 mol%, 11 mol%, 10 mol%, 9 mol%, 8 mol%, 7 mol%, 6 mol%, 5 mol%, or 4 mol%, relative to 100 mol% of the component (A). In one embodiment, the content of structural unit (a1) in component (A) is preferably 4 to 100 mol %, more preferably 4 to 90 mol %, and even more preferably 10 to 80 mol %, relative to 100 mol % of component (A), in order to control elution of component (B) into water in soil.

[0106] There are no particular limitations on the content of the structural unit (a2) in the component (A). For example, the content of the structural unit (a2) in the component (A) relative to 100% by mass of the component (A) may be 50%, 49%, 48%, 47%, 46%, 45%, 44%, 43%, 42%, 41%, 40%, 39%, 38%, 37%, 36%, 35%, 34%, 33%, 32%, 31%, 30%, 29%, or 39% by mass. %, 28 mass%, 27 mass%, 26 mass%, 25 mass%, 24 mass%, 23 mass%, 22 mass%, 21 mass%, 20 mass%, 19 mass%, 18 mass%, 17 mass%, 16 mass%, 15 mass%, 14 mass%, 13 mass%, 12 mass%, 11 mass%, 10 mass%, 9 mass%, 8 mass%, 7 mass%, 6 mass%, 5 mass%, 4 mass%, 3 mass%, 2 mass%, 1 mass%, 0 mass%, etc. In one embodiment, the content of structural unit (a2) in component (A) is preferably 0 to 50 mass%, more preferably 3 to 50 mass%, and even more preferably 10 to 50 mass%, relative to 100 mass% of component (A), in order to control elution of component (B) into water in soil.

[0107] The content of the structural unit (a2) in the component (A) is, for example, 50 mol%, 49 mol%, 48 mol%, 47 mol%, 46 mol%, 45 mol%, 44 mol%, 43 mol%, 42 mol%, 41 mol%, 40 mol%, 39 mol%, 38 mol%, 37 mol%, 36 mol%, 35 mol%, 34 mol%, 33 mol%, 32 mol%, 31 mol%, 30 mol%, 29 mol%, or the like, relative to 100 mol% of the component (A). %, 28 mol%, 27 mol%, 26 mol%, 25 mol%, 24 mol%, 23 mol%, 22 mol%, 21 mol%, 20 mol%, 19 mol%, 18 mol%, 17 mol%, 16 mol%, 15 mol%, 14 mol%, 13 mol%, 12 mol%, 11 mol%, 10 mol%, 9 mol%, 8 mol%, 7 mol%, 6 mol%, 5 mol%, 4 mol%, 3 mol%, 2 mol%, 1 mol%, 0 mol%, etc. In one embodiment, the content of structural unit (a2) in component (A) is preferably 0 to 50 mol%, more preferably 3 to 50 mol%, and even more preferably 10 to 50 mol%, relative to 100 mol% of component (A), in order to control leaching of component (B) into water in the soil.

[0108] The content of the structural unit (a3) ​​in the component (A) is not particularly limited. Examples of the content of the structural unit (a3) ​​in the component (A), relative to 100 mass% of the component (A), include 40 mass%, 39 mass%, 38 mass%, 37 mass%, 36 mass%, 35 mass%, 34 mass%, 33 mass%, 32 mass%, 31 mass%, 30 mass%, 29 mass%, 28 mass%, 27 mass%, 26 mass%, 25 mass%, 24 mass%, 23 mass%, 22 mass%, 21 mass%, 20 mass%, 19 mass%, 18 mass%, 17 mass%, 16 mass%, 15 mass%, 14 mass%, 13 mass%, 12 mass%, 11 mass%, 10 mass%, 9 mass%, 8 mass%, 7 mass%, 6 mass%, 5 mass%, 4 mass%, 3 mass%, 2 mass%, 1 mass%, and 0 mass%, etc. In one embodiment, the content of structural unit (a3) ​​in component (A) is preferably 0 to 40% by mass, more preferably 3 to 40% by mass, and even more preferably 10 to 40% by mass, relative to 100% by mass of component (A), in order to control elution of component (B) into water in soil.

[0109] The amount of the structural unit (a3) ​​in the component (A), relative to 100 mol% of the component (A), can be, for example, 40 mol%, 39 mol%, 38 mol%, 37 mol%, 36 mol%, 35 mol%, 34 mol%, 33 mol%, 32 mol%, 31 mol%, 30 mol%, 29 mol%, 28 mol%, 27 mol%, 26 mol%, 25 mol%, 24 mol%, 23 mol%, 22 mol%, 21 mol%, 20 mol%, 19 mol%, 18 mol%, 17 mol%, 16 mol%, 15 mol%, 14 mol%, 13 mol%, 12 mol%, 11 mol%, 10 mol%, 9 mol%, 8 mol%, 7 mol%, 6 mol%, 5 mol%, 4 mol%, 3 mol%, 2 mol%, 1 mol%, or 0 mol%, for example. In one embodiment, the content of the structural unit (a3) ​​in the component (A) is preferably 0 to 40 mol %, more preferably 3 to 40 mol %, and even more preferably 10 to 40 mol %, relative to 100 mol % of the component (A), in order to control the elution of the component (B) into water in the soil.

[0110] There are no particular limitations on the amount of structural unit (a4) contained in component (A). Examples of the amount of structural unit (a4) contained in component (A), relative to 100% by mass of component (A), include 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%, 20%, 19%, 18%, 17%, 16%, 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, and 0% by mass. In one embodiment, the content of the structural unit (a4) in the component (A) is preferably 0 to 90 mass%, more preferably 10 to 60 mass%, and even more preferably 10 to 60 mass%, relative to 100 mass% of the component (A), in order to control the elution of the component (B) into water in the soil.

[0111] The amount of the structural unit (a4) in the component (A) may, for example, be 80 mol%, 75 mol%, 70 mol%, 65 mol%, 60 mol%, 55 mol%, 50 mol%, 45 mol%, 40 mol%, 35 mol%, 30 mol%, 25 mol%, 20 mol%, 19 mol%, 18 mol%, 17 mol%, 16 mol%, 15 mol%, 14 mol%, 13 mol%, 12 mol%, 11 mol%, 10 mol%, 9 mol%, 8 mol%, 7 mol%, 6 mol%, 5 mol%, 4 mol%, 3 mol%, 2 mol%, 1 mol%, or 0 mol%, relative to 100 mol% of the component (A). In one embodiment, the content of the structural unit (a4) in the component (A) is preferably 0 to 90 mol %, more preferably 10 to 60 mol %, and even more preferably 10 to 60 mol %, relative to 100 mol % of the component (A), in order to control the elution of the component (B) into water in the soil.

[0112] There are no particular limitations on the total amount of the structural units (a1), (a2), and (a3) ​​in the component (A). Examples of the total amount of the structural units (a1), (a2), and (a3) ​​in the component (A), relative to 100% by mass of the component (A), include 100%, 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%, and 20% by mass. In one embodiment, the total amount of the structural units (a1), (a2), and (a3) ​​in the component (A) is preferably 20% by mass or more, more preferably 20 to 100% by mass, and even more preferably 40 to 100% by mass, relative to 100% by mass of the component (A), in order to control the elution of the component (B) into water in the soil.

[0113] The total amount of the structural units (a1), (a2), and (a3) ​​in the component (A) is, for example, 100 mol%, 95 mol%, 90 mol%, 85 mol%, 80 mol%, 75 mol%, 70 mol%, 65 mol%, 60 mol%, 55 mol%, 50 mol%, 45 mol%, 40 mol%, 35 mol%, 30 mol%, 25 mol%, 20 mol%, etc., relative to 100 mol% of the component (A). In one embodiment, the total amount of the structural units (a1), (a2), and (a3) ​​in the component (A) is preferably 20 mol% or more, more preferably 20 to 100 mol%, and even more preferably 40 to 100 mol%, relative to 100 mol% of the component (A), in order to control the leaching of the component (B) into water in the soil.

[0114] (Physical properties of polymer (A)) The physical properties of component (A) are not particularly limited. The weight average molecular weight (Mw) of component (A) is, for example, 6,000,000, 5,500,000, 5,000,000, 4,500,000, 4,000,000, 3,500,000, 3,000,000, 2,500,000, 2,000,000, 1,500,000, 1,000,000, 950,000, 9 Examples of such molecular weights include 00,000, 850,000, 800,000, 750,000, 700,000, 650,000, 600,000, 550,000, 500,000, 450,000, 400,000, 350,000, 300,000, 250,000, 200,000, 150,000, and 100,000. In one embodiment, the weight-average molecular weight of component (A) is preferably 6,000,000 or less, more preferably about 100,000 to 6,000,000, and even more preferably about 200,000 to 4,000,000, in order to control the elution of component (B) into water in the soil. In the present disclosure, the weight average molecular weight of the component (A) refers to a polyethylene oxide equivalent value determined by gel permeation chromatography (GPC).

[0115] The number average molecular weight (Mn) of component (A) is, for example, 6,000,000, 5,500,000, 5,000,000, 4,500,000, 4,000,000, 3,500,000, 3,000,000, 2,500,000, 2,000,000, 1,500,000, 1,000,000, 950,000, 9 Examples of the number average molecular weight of the component (A) include 00,000, 850,000, 800,000, 750,000, 700,000, 650,000, 600,000, 550,000, 500,000, 450,000, 400,000, 350,000, 300,000, 250,000, 200,000, 150,000, and 100,000. In one embodiment, the number average molecular weight of the component (A) is preferably 6,000,000 or less, more preferably about 100,000 to 6,000,000, and even more preferably about 200,000 to 4,000,000, in order to control the elution of the component (B) into water in the soil. In the present disclosure, the number average molecular weight of the component (A) refers to a polyethylene oxide equivalent value determined by gel permeation chromatography (GPC).

[0116] The viscosity of an aqueous solution of component (A) (25°C, non-volatile content 25% by mass) is, for example, 2,000 mPa·s, 1,500 mPa·s, 1,000 mPa·s, 950 mPa·s, 900 mPa·s, 850 mPa·s, 800 mPa·s, 750 mPa·s, 700 mPa·s, 650 mPa·s, 600 mPa·s, 550 mPa·s, 500 mPa·s, 450 mPa·s, 400 mPa·s, Examples of viscosity values ​​include 350 mPa·s, 300 mPa·s, 250 mPa·s, 200 mPa·s, 150 mPa·s, 100 mPa·s, 90 mPa·s, 80 mPa·s, 70 mPa·s, 60 mPa·s, 50 mPa·s, 40 mPa·s, 30 mPa·s, 20 mPa·s, 10 mPa·s, 9 mPa·s, 8 mPa·s, 7 mPa·s, 6 mPa·s, and 5 mPa·s. In one embodiment, the viscosity of an aqueous solution of component (A) (25°C, nonvolatile content 25% by mass) is preferably about 5 to 2,000 mPa·s, and more preferably about 100 to 2,000 mPa·s, in order to control the elution of component (B) into water in the soil. In the present disclosure, the viscosity of an aqueous solution of component (A) (25°C, non-volatile content 25% by mass) refers to the viscosity measured with a Brookfield rotational viscometer.

[0117] (Method for producing polymer (A)) The method for producing polymer (A) is not particularly limited, as long as it is a method (polymerization method) for polymerizing component (a1'), and, if necessary, component (a2'), component (a3'), and component (a4'), and various known methods can be used. Examples of the polymerization method include solution polymerization, emulsion polymerization, and suspension polymerization. The polymerization conditions for the polymerization method are not particularly limited. In one embodiment, the reaction temperature is typically about 80 to 180°C. In one embodiment, the reaction time is typically about 1 to 10 hours. In one embodiment, the polymerization method may use various reaction solvents, radical polymerization initiators, chain transfer agents, and surfactants as needed. In one embodiment, the carboxyl groups, sulfonic acid groups, and phosphate groups contained in the structural units (a3) ​​and (a4) in the resulting component (A) may be neutralized with a base as needed.

[0118] The reaction solvent is not particularly limited, and various known solvents can be used. Examples of the reaction solvent include alcohols such as ethyl alcohol and isopropyl alcohol; lower ketones such as acetone and methyl ethyl ketone; aromatic hydrocarbons such as toluene and benzene; organic solvents such as ethyl acetate, chloroform and dimethylformamide; water; and mixed solvents of the organic solvents with water. The reaction solvents may be used alone or in combination of two or more.

[0119] The radical polymerization initiator is not particularly limited, and various known initiators can be used. Examples of the radical polymerization initiator include inorganic peroxides such as hydrogen peroxide, ammonium persulfate, and potassium persulfate; organic peroxides such as t-butyl peroxybenzoate, dicumyl peroxide, and lauryl peroxide; azo compounds such as 2,2'-azobisisobutyronitrile, dimethyl-2,2'-azobisisobutyrate, and 2,2'-azobis-2-amidinopropane dihydrochloride; and redox initiators combining the above persulfates with a reducing agent (e.g., sodium hydrogen sulfite). The radical polymerization initiators may be used alone or in combination of two or more.

[0120] The chain transfer agent is not particularly limited, and various known agents can be used. Examples of the chain transfer agent include oil-soluble chain transfer agents such as t-dodecyl mercaptan, n-dodecyl mercaptan, n-octyl mercaptan, cumene, bromotrichloromethane, 2-mercaptobenzothiazole, and α-methylstyrene dimer; and water-soluble chain transfer agents such as ethanethiol, propanethiol, thioglycolic acid, thiomalic acid, dimethyldithiocarbamic acid, isopropyl alcohol, and sodium hypophosphite. The chain transfer agents may be used alone or in combination of two or more.

[0121] The surfactant is not particularly limited, and various known surfactants can be used. Examples of the surfactant include the reactive emulsifiers, anionic surfactants that do not have a polymerizable carbon-carbon double bond in the molecule, and nonionic surfactants. The surfactants may be used alone or in combination of two or more.

[0122] Examples of the anionic surfactant include dialkyl sulfosuccinates, dialkyl sulfosuccinate ester salts, alkanesulfonates, α-olefinsulfonates, polyoxyethylene alkyl ether sulfosuccinates, polyoxyethylene alkyl ether sulfosuccinate ester salts, polyoxyethylene styryl phenyl ether sulfosuccinates, polyoxyethylene styryl phenyl ether sulfosuccinate ester salts, naphthalenesulfonic acid formalin condensates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl ether sulfate ester salts, polyoxyethylene alkyl phenyl ether sulfates, and polyoxyethylene alkyl phenyl ether sulfate ester salts.

[0123] Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene styryl phenyl ether, and polyoxyethylene sorbitan fatty acid ester.

[0124] <Ureas (B)> The component (B) is not particularly limited and various known components can be used. The component (B) may be used alone or in combination of two or more.

[0125] Examples of the component (B) include urea, guanylurea, and urea polymers.

[0126] The urea polymer may be, for example, a biuret of urea.

[0127] In one embodiment, the component (B) is preferably urea.

[0128] <Aldehydes (C)> Component (C) is not particularly limited, and various known compounds can be used as long as they have a formyl group in the molecule. Component (C) may be used alone or in combination of two or more types.

[0129] The above reaction product is obtained by reacting component (C) with components (A) and (B).

[0130] The component (C) is, for example, a compound represented by the general formula (1): R 1 -CHO(in the formula, R 1 represents an alkyl group, an alkenyl group, an alkynyl group, or an aromatic group which may have a substituent.

[0131] Examples of the alkyl group in the general formula (1) include linear or branched alkyl groups having 1 to 20 carbon atoms. Examples of the alkenyl group in the general formula (1) include linear or branched alkenyl groups having 1 to 20 carbon atoms. Examples of the alkynyl group in the general formula (1) include linear or branched alkynyl groups having 1 to 20 carbon atoms. Examples of the aromatic group in the general formula (1) include the aromatic groups described above in relation to the disclosure of the aromatic vinyl compound.

[0132] Examples of the component (C) include formaldehyde, formalin, paraform, acetaldehyde, propionaldehyde, n-butyraldehyde, isobutyraldehyde, acrolein, crotonaldehyde, glyoxal, furfural, and benzaldehyde.

[0133] In one embodiment, component (C) is preferably at least one selected from the group consisting of formaldehyde, formalin, paraform, acetaldehyde, and isobutyraldehyde, from the viewpoint of controlling the elution of component (B) into water in the soil, and more preferably at least one selected from the group consisting of formaldehyde, formalin, and paraform.

[0134] In one embodiment, the reaction components of the above-mentioned reactant may optionally contain other components (hereinafter referred to as other components) other than the components (A), (B), and (C), as long as the effects of the present disclosure are not impaired.

[0135] The other component is not particularly limited, and in one embodiment, the other component may be a compound capable of reacting with the component (C), the reaction product of the component (A) and the component (C), or the reaction product of the component (B) and the component (C).

[0136] (Content of each ingredient) The content of component (A) in the reaction components of the reaction product is not particularly limited. Examples of the content of component (A) in the reaction components of the reaction product, calculated as nonvolatile content, per 100 parts by mass of the reaction components include 80 parts by mass, 75 parts by mass, 70 parts by mass, 65 parts by mass, 60 parts by mass, 55 parts by mass, 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, and 10 parts by mass. In one embodiment, the content of component (A) is preferably about 10 to 80 parts by mass, more preferably about 20 to 80 parts by mass, per 100 parts by mass of the reaction components, calculated as nonvolatile content, in order to control the elution of component (B) into water in the soil.

[0137] The content of component (B) in the reaction components of the reaction product is not particularly limited. Examples of the content of component (B) in the reaction components of the reaction product, calculated as nonvolatile content, per 100 parts by mass of the reaction components include 80 parts by mass, 75 parts by mass, 70 parts by mass, 65 parts by mass, 60 parts by mass, 55 parts by mass, 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, and 10 parts by mass. In one embodiment, the content of component (B) is preferably about 10 to 80 parts by mass, more preferably about 10 to 70 parts by mass, per 100 parts by mass of the reaction components, calculated as nonvolatile content, in order to control leaching of component (B) into water in soil.

[0138] The content of component (C) in the reaction components of the reaction product is not particularly limited. Examples of the content of component (C) in the reaction components of the reaction product, calculated as nonvolatile content, per 100 parts by mass of the reaction components include 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, 10 parts by mass, 9 parts by mass, 8 parts by mass, 7 parts by mass, 6 parts by mass, and 5 parts by mass. In one embodiment, the content of component (C), calculated as nonvolatile content, per 100 parts by mass of the reaction components, is preferably about 5 to 50 parts by mass, more preferably about 5 to 30 parts by mass, in order to control the elution of component (B) into water in the soil.

[0139] (Physical properties of reactants) The physical properties of the reaction product are not particularly limited.

[0140] (Method for producing the reaction product) The method for producing the reaction product is not particularly limited as long as it is a method (reaction method) for reacting (condensing) component (A), component (B), and component (C), and, if necessary, other components described above, and various known methods can be used.

[0141] The reaction method may be, for example, a method in which components (A), (B), and (C), and, if necessary, the other components, are condensed in the presence of an acid catalyst.

[0142] Examples of the acid catalyst include inorganic acids and organic acids.

[0143] Examples of the inorganic acid include hydrochloric acid, sulfuric acid, nitric acid, sulfurous acid, phosphoric acid, and boron trifluoride.

[0144] Examples of the organic acid include p-toluenesulfonic acid, methanesulfonic acid, and dodecylbenzenesulfonic acid.

[0145] The reaction temperature in the above reaction method is, for example, 25 to 100°C.

[0146] The reaction time in the above reaction method is, for example, 1 to 3 hours.

[0147] In one embodiment, various solvents may be used in the reaction method as needed. Examples of the solvent include alcohols such as ethyl alcohol and isopropyl alcohol; lower ketones such as acetone and methyl ethyl ketone; aromatic hydrocarbons such as toluene and benzene; organic solvents such as ethyl acetate, chloroform and dimethylformamide; water; and mixed solvents of the organic solvents with water. One type of the solvent may be used alone, or two or more types may be used in combination. In one embodiment, a preferred example of the solvent is water.

[0148] In the above reaction method, the order in which the components (A), (B), and (C), and optionally the other components, are reacted is not particularly limited. In one embodiment, the above reaction method may involve reacting the respective components all at once.

[0149] (fertilizer) In one embodiment, the fertilizer composition may optionally contain various known fertilizers, as long as the effects of the present disclosure are not impaired. The fertilizers may be used alone or in combination of two or more.

[0150] Examples of the fertilizer include nitrogenous fertilizers, phosphate fertilizers, potassium fertilizers, organic fertilizers, compound fertilizers (chemical fertilizers), lime fertilizers, silicate fertilizers, magnesium fertilizers, manganese fertilizers, boron fertilizers, trace element compound fertilizers, sludge fertilizers, and the like, other than the reactants.

[0151] Examples of the nitrogenous fertilizer include urea, ammonium sulfate, ammonium chloride, ammonium nitrate, humic acid ammonium, isobutylaldehyde condensed urea, formaldehyde condensed urea, acetaldehyde condensed urea, oxamide, calcium lime nitrogen, glycol urea, and methylol urea polymer fertilizer.

[0152] Examples of the phosphate fertilizer include calcium superphosphate, calcium triple superphosphate, magnesium phosphate, monoammonium phosphate, ammonium dihydrogen phosphate, burnt phosphorus, burnt magnesium phosphorus, humic acid phosphate fertilizer, fused phosphate fertilizer, and burnt phosphate fertilizer.

[0153] Examples of the potassium fertilizer include potassium sulfate, potassium chloride, potassium nitrate, potassium silicate, and potassium humate.

[0154] (additives) In one embodiment, the fertilizer composition may optionally contain additives, as long as the additives do not impair the effects of the present disclosure. The additives may be used alone or in combination of two or more.

[0155] Examples of the additives include solvents, carriers, binders, surfactants, blackstrap molasses, animal oils, vegetable oils, hydrogenated oils, fatty acids, fatty acid metal salts, paraffin, wax, and glycerin.

[0156] Examples of the carrier include talc, mica, calcium carbonate, sulfur, clay, diatomaceous earth, zeolite, perlite, ziegelite, sericite, kaolin, pumice, silica, vermiculite, calcium carbonate, activated clay, bentonite, dried plant materials such as rice husk, sawdust, soybean flour, corn stalks, and plant fibers, pulp flock, white carbon, and activated carbon.

[0157] Examples of the binder include carboxymethyl cellulose, methyl cellulose, ethyl cellulose, polyvinylpyrrolidone, pullulan, acrylic polymers, polyvinyl alcohol, gelatin, agar, gum arabic, gum arabic powder, xanthan gum, toran gum, guar gum, gellan gum, locust bean gum, partially pregelatinized starch, macrogol, starch, soluble starch, dextrin, tragacanth gum, β-glucan, pectin, casein, soy protein, hydroxyethyl cellulose, acetyl cellulose, lignin sulfonic acid, carboxymethyl starch, hydroxyethyl starch, polyvinyl methyl ether, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, polyethylene glycol, polyethylene oxide, polyvinylpyrrolidone, shellac, rosin, tall oil, ester gum, polyvinyl acetate, polylactic acid, polyvinyl chloride, polyester, polyurea, polyamide, coumarone resin, and biodegradable resin.

[0158] (Content of each component of the fertilizer composition) The content of the reactant in the fertilizer composition is not particularly limited. Examples of the content of the reactant in the fertilizer composition, calculated as nonvolatile content, relative to 100 parts by mass of the fertilizer composition include 100 parts by mass, 95 parts by mass, 90 parts by mass, 85 parts by mass, 80 parts by mass, 75 parts by mass, 70 parts by mass, 65 parts by mass, 60 parts by mass, 55 parts by mass, 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, and 10 parts by mass. In one embodiment, the content of the reactant, in terms of nonvolatile content, relative to 100 parts by mass of the fertilizer composition, is preferably about 10 to 100 parts by mass, more preferably about 10 to 99.8 parts by mass, even more preferably about 30 to 90 parts by mass, and even more preferably about 30 to 79.9 parts by mass.

[0159] The content of the fertilizer in the fertilizer composition is not particularly limited. For example, the content of the fertilizer in the fertilizer composition, calculated as nonvolatile content, relative to 100 parts by mass of the fertilizer composition, can be 90 parts by mass, 89.9 parts by mass, 85 parts by mass, 80 parts by mass, 75 parts by mass, 70 parts by mass, 69.9 parts by mass, 65 parts by mass, 60 parts by mass, 55 parts by mass, 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, 10 parts by mass, 9 parts by mass, 8 parts by mass, 7 parts by mass, 6 parts by mass, 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, 0 parts by mass, etc. In one embodiment, the content of the fertilizer, in terms of nonvolatile content, relative to 100 parts by mass of the fertilizer composition, is preferably about 0 to 90 parts by mass, more preferably about 0.1 to 89.9 parts by mass, even more preferably about 9.9 to 69.9 parts by mass, and even more preferably about 20 to 60 parts by mass.

[0160] The content of the additive in the fertilizer composition is not particularly limited. Examples of the content of the additive in the fertilizer composition, calculated as nonvolatile content, per 100 parts by mass of the fertilizer composition include 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, 10 parts by mass, 9 parts by mass, 8 parts by mass, 7 parts by mass, 6 parts by mass, 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, 0.9 parts by mass, 0.8 parts by mass, 0.7 parts by mass, 0.6 parts by mass, 0.5 parts by mass, 0.4 parts by mass, 0.3 parts by mass, 0.2 parts by mass, 0.1 parts by mass, and 0 parts by mass. In one embodiment, the content of the additive, in terms of nonvolatile content, relative to 100 parts by mass of the fertilizer composition, is preferably about 0 to 50 parts by mass, more preferably about 0.1 to 50 parts by mass, even more preferably about 0.1 to 50 parts by mass, and even more preferably about 0.1 to 30 parts by mass.

[0161] (Physical properties of fertilizer composition) The physical properties of the fertilizer composition are not particularly limited.

[0162] In one embodiment, the fertilizer composition is preferably a granular composition (granular fertilizer composition).

[0163] The granular shape of the granular fertilizer composition is not particularly limited, and examples of the granular shape of the granular fertilizer composition include spherical, cylindrical, flake, corrugated, and pellet shapes.

[0164] Examples of particle sizes of the granular fertilizer composition include 50.0 mm, 45.0 mm, 40.0 mm, 35.0 mm, 30.0 mm, 25.0 mm, 20.0 mm, 15.0 mm, 10.0 mm, 9.5 mm, 9.0 mm, 8.5 mm, 8.0 mm, 7.5 mm, 7.0 mm, 6.5 mm, 6.0 mm, 5.5 mm, 5.0 mm, 4.5 mm, 4.0 mm, 3.5 mm, 3.0 mm, 2.5 mm, 2.0 mm, 1.5 mm, 1.0 mm, 0.9 mm, 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm, and 0.1 mm. In one embodiment, the particle size of the granular fertilizer composition is preferably about 0.1 to 50.0 mm, more preferably about 0.1 to 10.0 mm, and even more preferably about 0.1 to 5.0 mm, in order to control the elution of component (B) into water in the soil.

[0165] (Use of fertilizer composition) The use of the fertilizer composition is not particularly limited, and examples of the use of the fertilizer composition include application to soil in which plants are grown (hereinafter also simply referred to as cultivation soil).

[0166] The soil to be used as the cultivation soil is not particularly limited, and various known soils can be used. One type of soil may be used alone, or two or more types may be used in combination.

[0167] Examples of the soil that can be used in the cultivation of the above-mentioned crops include Kanuma soil, Akadama soil, Hyuga soil, Kurosoil, Shirakawa sand, Kiryu sand, Yahagi sand, river sand, mountain sand, gravel, leaf mold, bark, cryptomoss, peat moss, lime, pumice, mountain moss, sphagnum moss, keto soil, volcanic ash, smoked ash, perlite, vermiculite, zeolite, Osmunda, Dream Ball, Baked Akadama, Clay Ball, Hydro Ball, and commercially available mixed culture soils.

[0168] The soil to be used for cultivation may further contain magnesium lime, peat moss, fertilizer, agricultural chemicals, etc.

[0169] The fertilizer composition can be applied to the cultivation soil by, for example, spraying the cultivation soil, irrigation treatment, and / or mixing with the cultivation soil, etc. The cultivation soil also includes "seedling soil" for growing plant seedlings that are intended to be transplanted into other soil.

[0170] The timing of application of the fertilizer composition to the cultivation soil can be, for example, at least one selected from before sowing, at the time of sowing, at the time of raising seedlings, at the time of planting, and at the time of top dressing.

[0171] When the fertilizer composition is applied to cultivation soil, the amount of the fertilizer composition used is not particularly limited. Examples of the amount of the fertilizer composition used, calculated as nonvolatile content, per 100 parts by mass of cultivation soil include 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, 0.9 parts by mass, 0.8 parts by mass, 0.7 parts by mass, 0.6 parts by mass, 0.5 parts by mass, 0.4 parts by mass, 0.3 parts by mass, 0.2 parts by mass, and 0.1 parts by mass. In one embodiment, the amount of the fertilizer composition used, calculated as nonvolatile content, per 100 parts by mass of cultivation soil is preferably about 0.1 to 5 parts by mass, more preferably about 0.1 to 1 part by mass, and even more preferably about 0.4 to 1 part by mass.

[0172] When the fertilizer composition is applied to cultivation soil, the amount of the fertilizer composition used, in terms of nonvolatile content, per 10 a (10 ares, i.e., 1,000 square meters) of cultivation soil can be, for example, 5,000 kg, 4,500 kg, 4,000 kg, 3,500 kg, 3,000 kg, 2,500 kg, 2,000 kg, 1,500 kg, 1,000 kg, 900 kg, 800 kg, 700 kg, 600 kg, 500 kg, 400 kg, 300 kg, 200 kg, or 100 kg. In one embodiment, the amount of the fertilizer composition used, in terms of nonvolatile content, per 10 a of cultivation soil can be preferably about 100 to 5,000 kg, and more preferably about 400 to 1,000 kg.

[0173] The target plants in the cultivation soil are not particularly limited, and examples of the plants include wheat, barley, wheat, rye, oats, and other wheat varieties; potatoes, sweet potatoes, taro, yams, and other potatoes; beans, such as soybeans, adzuki beans, broad beans, peas, kidney beans, and peanuts; corn, millet, buckwheat, cabbage, Chinese cabbage, radish, turnip, broccoli, cauliflower, Japanese mustard spinach, and radish; and vegetables, such as pumpkin, cucumber, watermelon, melon, zucchini, yugao, and bitter melon. Solanaceae crops such as eggplant, tomato, bell pepper, chili pepper, and shishito pepper; Malvaceae crops such as okra; Chenopodiaceae crops such as spinach and common laurel; Umbelliferae crops such as carrot, mitsuba, parsley, celery, and burdock; Asteraceae crops such as lettuce and burdock; garlic, onion, leek, chive, scallion, and other allium species; asparagus, shiso, lotus root, shiitake, mushrooms, and other mushrooms; citrus fruits; apples; and pears. Fruit trees and fruits such as peaches, plums, cherries, pears, apricots, grapes, persimmons, loquats, figs, akebia, blueberries, grapes, raspberries, pineapples, mangoes, kiwifruit, bananas, strawberries, olives, walnuts, chestnuts, almonds, ornamental crops such as lavender, rosemary, thyme, sage, pepper, ginger, and other spices, tobacco, tea, sugar beets, sugarcane, rushes, sesame, konjac, hops, cotton, hemp, olives, rubber, coffee Examples of suitable grasses include rapeseed, sunflower, mulberry, timothy, clover, alfalfa, and other legumes; corn, sorghum, orchard grass, and other grasses; Korean grass, bentgrass, and other turfgrass; forest trees such as fir trees, spruce trees, pines, Japanese cypress, cedar, and cypress; herbaceous plants and flowers such as chrysanthemums, roses, carnations, lilies, lisianthus, perennial baby's breath, statice, and orchids; and garden trees such as ginkgo, cherry trees, and Japanese maples.

[0174] (Method of producing fertilizer composition) The method for producing the fertilizer composition is not particularly limited. The fertilizer composition may be obtained by using the reactant as it is, or by mixing the reactant with the fertilizer and the additive as needed, and the method for mixing them is also not particularly limited. The solvent used in the method for producing the reactant may be used as it is as the solvent for the fertilizer composition.

[0175] The method for producing the granular fertilizer composition is not particularly limited, and the granular fertilizer composition can be produced by any of various known granulation methods.

[0176] Examples of the granulation method for the granular fertilizer composition include extrusion granulation, fluidized bed granulation, tumbling granulation, compression granulation, coating granulation, and adsorption granulation.

[0177] In the method for producing the granular fertilizer composition, various known granulators can be used. Examples of the granulator include a tumbling granulator, an agitation granulator, a compression granulator, an extrusion granulator, a crushing granulator, and a fluidized bed granulator. As the granulator, an extrusion granulator or a tumbling granulator is preferred because it allows for easy production of a granular fertilizer composition.

[0178] [Coated fertilizer] The present disclosure relates to a coated fertilizer comprising a fertilizer composition and a coating that coats the fertilizer composition, the coating comprising a resin. The coating comprises a resin as a material that forms the coating (coating material).

[0179] <Resin> The resin for the coating material is not particularly limited, and various known resins can be used. One type of resin may be used alone, or two or more types may be used in combination.

[0180] Examples of the resin for the coating material include thermoplastic resin and thermosetting resin.

[0181] (thermosetting resin) The thermosetting resin is not particularly limited, and various known thermosetting resins can be used, such as epoxy resins, phenolic resins, unsaturated polyester resins, vinyl ester resins, alkyd resins, and drying oils.

[0182] Examples of the epoxy resin include bisphenol-type epoxy resins, amine-type epoxy resins, phenol novolac-type epoxy resins, cresol novolac-type epoxy resins, resorcinol-type epoxy resins, phenol aralkyl-type epoxy resins, naphthol aralkyl-type epoxy resins, dicyclopentadiene-type epoxy resins, epoxy resins having a biphenyl skeleton, isocyanate-modified epoxy resins, tetraphenylethane-type epoxy resins, and triphenylmethane-type epoxy resins. Bisphenol-type epoxy resins are bisphenol compounds in which two phenolic hydroxyl groups have been glycidylated. Examples include bisphenol A, bisphenol F, bisphenol AD, and bisphenol S, as well as halogen- or alkyl-substituted and hydrogenated versions of these bisphenols. Furthermore, not only monomers but also polymers having multiple repeating units can be suitably used.

[0183] The phenolic resin may be a condensation reaction product of a phenol (such as phenol, cresol, or xylenol) and an aldehyde (such as formaldehyde).

[0184] Examples of the unsaturated polyester resin include a condensate of fumaric acid or maleic acid with an ethylene oxide adduct of bisphenol A, a condensate of fumaric acid or maleic acid with a propylene oxide adduct of bisphenol A, and a condensate of fumaric acid or maleic acid with an ethylene oxide and propylene oxide adduct of bisphenol A (the addition of ethylene oxide and propylene oxide may be random or block).

[0185] Examples of the vinyl ester resin include epoxy (meth)acrylates obtained by esterifying the epoxy resin with an α,β-unsaturated monocarboxylic acid. Examples of the α,β-unsaturated monocarboxylic acid include acrylic acid, methacrylic acid, crotonic acid, tiglic acid, and cinnamic acid, and two or more of these may be used in combination. Specific examples of vinyl ester resins include (meth)acrylate-modified bisphenol-type epoxy resins (terminal (meth)acrylate-modified resins obtained by reacting the epoxy group of a bisphenol A-type epoxy resin with the carboxyl group of (meth)acrylic acid).

[0186] (thermoplastic resin) The thermoplastic resin is not particularly limited, and various known thermoplastic resins can be used, such as polyolefin resins, polyamide resins, polyester resins, polyurethane resins, styrene resins, vinylidene chloride polymers, diene polymers, waxes, petroleum resins, natural resins, oils and fats, and modified products thereof.

[0187] Examples of the polyolefin resin include homopolymers of α-olefins having about 2 to 8 carbon atoms, such as ethylene, propylene, and 1-butene; and binary or ternary (co)polymers of these α-olefins with other α-olefins having about 2 to 18 carbon atoms, such as ethylene, propylene, 1-butene, 3-methyl-1-butene, 1-pentene, 4-methyl-1-pentene, 4,4-dimethyl-1-pentene, 1-hexene, 4-methyl-1-hexene, 1-heptene, 1-octene, 1-decene, and 1-octadecene, or vinyl acetate. Other examples of the polyolefin resin include acid-modified products of the above polymers.

[0188] Examples of the polyolefin resin include ethylene resins such as polyethylene, ethylene-propylene copolymer, ethylene-1-butene copolymer, ethylene-propylene-1-butene copolymer, ethylene-4-methyl-1-pentene copolymer, ethylene-1-hexene copolymer, ethylene-1-heptene copolymer, and ethylene-1-octene copolymer; propylene resins such as polypropylene, propylene-ethylene copolymer, propylene-ethylene-1-butene copolymer, propylene-ethylene-4-methyl-1-pentene copolymer, and propylene-ethylene-1-hexene copolymer; 1-butene resins such as 1-butene homopolymer, 1-butene-ethylene copolymer, and 1-butene-propylene copolymer; and 4-methyl-1-pentene resins such as 4-methyl-1-pentene homopolymer and 4-methyl-1-pentene-ethylene copolymer.

[0189] The polyamide resin is not particularly limited as long as it is a resin that forms a main chain by repeating amide bonds, and examples thereof include polyamide 6 (obtained by ring-opening polymerization of ε-caprolactam), polyamide 66 (obtained by condensation polymerization of hexamethylenediamine and adipic acid), and other polyamide resins that have been made water-soluble by introducing hydrophilic groups into the main chain.

[0190] Examples of the polyester resin include polyester resins obtained by reacting an acid component containing a polycarboxylic acid with a polyhydric alcohol. Examples of the polycarboxylic acid include maleic acid, fumaric acid, itaconic acid, phthalic acid, trimellitic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, adipic acid, sebacic acid, and sodium 5-sulfoisophthalate, as well as derivatives thereof such as acid anhydrides. Two or more of these may be used in combination. Examples of the polyhydric alcohol include aliphatic glycols such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,2-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, and neopentyl glycol; alicyclic diols such as cyclopentanediol and cyclohexanediol; aromatic diols such as hydrogenated bisphenol A, bisphenol A ethylene oxide (1 to 100 mol) adduct, bisphenol A propylene oxide (1 to 100 mol) adduct, and xylene glycol; and polyhydric alcohols such as trimethylolpropane, pentaerythritol, and glycerol, and two or more of these may be used in combination.

[0191] The polyurethane resin is not particularly limited as long as it is a reaction product of a polyisocyanate compound and a polyol.

[0192] Examples of the styrene-based resin include resins obtained by polymerizing a styrene-based compound and, if necessary, another compound copolymerizable therewith, in the presence or absence of a rubbery polymer. Examples of the styrene-based compound include styrene, α-methylstyrene, o-methylstyrene, p-methylstyrene, vinylxylene, ethylstyrene, dimethylstyrene, p-tert-butylstyrene, vinylnaphthalene, methoxystyrene, monobromostyrene, dibromostyrene, fluorostyrene, and tribromostyrene. Examples of other compounds copolymerizable with the styrene-based compound include vinyl cyanide compounds, acrylic acid esters, methacrylic acid esters, epoxy group-containing methacrylic acid esters, maleimide compounds, α,β-unsaturated carboxylic acids and their anhydrides. Examples of the rubbery polymer include polybutadiene, polyisoprene, diene copolymers, copolymers of ethylene and α-olefins, copolymers of ethylene and unsaturated carboxylic acid esters, ethylene, propylene, and non-conjugated diene terpolymers, and acrylic rubbers. The styrene-based compound, the other compound copolymerizable with the styrene-based compound, and the rubbery polymer may be used alone or in combination of two or more. The styrene-based resin is preferably polystyrene.

[0193] Examples of the vinylidene chloride polymer include vinylidene chloride-vinyl chloride copolymers.

[0194] Examples of the diene polymer include butadiene polymer, isoprene polymer, chloroprene polymer, butadiene-styrene copolymer, EPDM polymer, and styrene-isoprene copolymer.

[0195] Examples of the waxes include beeswax, wood wax, and paraffin.

[0196] Examples of the petroleum resin include aliphatic petroleum resins, alicyclic petroleum resins, aromatic petroleum resins, aliphatic-aromatic petroleum resins, alicyclic-aromatic petroleum resins, pure monomer resins, and hydrogenated petroleum resins obtained by hydrogenating these petroleum resins.

[0197] Examples of the natural resin include natural rubber, rosin-based resin, and terpene-based resin.

[0198] Examples of the fats and oils and modified fats include animal fats and oils, vegetable fats and oils, hardened products such as hardened castor oil, solid fatty acids, and metal salts.

[0199] In one embodiment, the resin preferably comprises a biodegradable resin. By including a biodegradable resin in the resin, the fertilizer composition can be made into an environmentally friendly fertilizer because the coating material can be prevented from remaining in the environment.

[0200] The biodegradable resin is not particularly limited, and various known resins can be used. The biodegradable resins may be used alone or in combination of two or more.

[0201] Examples of the biodegradable resin include polybutylene succinate, polybutylene adipate terephthalate, polybutylene succinate adipate, polybutylene succinate terephthalate, polyethylene succinate, polyethylene terephthalate succinate, polylactic acid, polyglycolic acid, polycaprolactone, polyhydroxyalkanoate, starch polyester, cellulose acetate, starch, carboxymethyl cellulose, cellulose, lignin, chitin, and chitosan.

[0202] (filler) In one embodiment, the coating material may optionally contain a filler, as long as it does not impair the effect of the present disclosure.

[0203] The filler is not particularly limited, and various known fillers can be used. The fillers may be used alone or in combination of two or more.

[0204] Examples of the filler include those mentioned above in relation to the carrier in the additive of the fertilizer composition. The filler may be used alone or in combination of two or more.

[0205] In one embodiment, the coated fertilizer may be the fertilizer composition coated with multiple layers of coatings, in which case each coating may be formed from a coating material having the same composition or from a coating material having a different composition.

[0206] (Content of each ingredient in coated fertilizer) The content of the resin in the coating material of the coated fertilizer is not particularly limited. Examples of the content of the resin in the coating material, calculated as nonvolatile content, per 100 parts by mass of the coating material include 100 parts by mass, 95 parts by mass, 90 parts by mass, 85 parts by mass, 80 parts by mass, 75 parts by mass, 70 parts by mass, 65 parts by mass, 60 parts by mass, 55 parts by mass, 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, and 20 parts by mass, etc. In one embodiment, the content of the resin, calculated as nonvolatile content, per 100 parts by mass of the coating material is preferably about 20 to 100 parts by mass, more preferably about 20 to 80 parts by mass, in order to control the elution of component (B) into water in the soil.

[0207] The content of the filler in the coating material of the coated fertilizer is not particularly limited. Examples of the content of the filler in the coating material, calculated as nonvolatile content, relative to 100 parts by mass of the coating material include 80 parts by mass, 75 parts by mass, 70 parts by mass, 65 parts by mass, 60 parts by mass, 55 parts by mass, 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, 10 parts by mass, 9 parts by mass, 8 parts by mass, 7 parts by mass, 6 parts by mass, 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, and 0 parts by mass. In one embodiment, the content of the filler is preferably about 0 to 80 parts by mass, more preferably about 20 to 80 parts by mass, calculated as nonvolatile content, per 100 parts by mass of the coating material, in order to control the elution of component (B) into water in the soil.

[0208] (Uses of coated fertilizers) The use of the coated fertilizer is not particularly limited, and examples of the use of the coated fertilizer include those described above in relation to the disclosure of the fertilizer composition.

[0209] When the coated fertilizer is applied to cultivation soil, the amount of the coated fertilizer used is not particularly limited. Examples of the amount of the coated fertilizer used include those described above in relation to the disclosure of the fertilizer composition.

[0210] (Method of manufacturing coated fertilizer) The method for producing the coated fertilizer is not particularly limited as long as it is a method for coating the fertilizer composition with the coating material (coating method), and various known methods can be used.

[0211] Examples of the coating method include a method in which a molten and dispersed coating material is sprayed onto a fertilizer composition; a method in which a coating material prepared by dissolving and dispersing (or suspending) the coating material in a solvent is sprayed onto a fertilizer composition (a solution spraying method); a method in which a monomer is sprayed onto the surface of the fertilizer composition and reacted on the surface to form a resin (a coating); and a dipping method in which a fertilizer composition is immersed in a coating material.

[0212] Examples of the coating method include pan coating, spouted bed coating, fluidized bed coating, rolling coating, dry coating, and combinations of these methods.

[0213] In one embodiment, the fertilizer composition used in the coating method is preferably a granular fertilizer composition.

[0214] In one embodiment, the method for producing the coated fertilizer may include forming one coating layer on the surface of the fertilizer composition and then forming multiple coating layers by the coating method, in which case the coating materials for the respective coating layers may have the same composition or different compositions.

[0215] [Method of using the resin composition] The present disclosure relates to a method for using a resin composition containing the above-described reactant as a fertilizer (hereinafter also simply referred to as a method for using).

[0216] In the above-mentioned method of use, by using the above-mentioned resin composition as a fertilizer, the leaching of ureas (B), which are fertilizer components, into water in the soil is suppressed, and therefore the leaching of ureas (B) is controlled.

[0217] (Resin composition) The resin composition is not particularly limited as long as it is a composition containing the above-mentioned reactant.

[0218] (fertilizer) In one embodiment, the resin composition may optionally contain various known fertilizers, as long as the effects of the present disclosure are not impaired. The fertilizers may be used alone or in combination of two or more. Examples of fertilizers include those described above in relation to the disclosure of the fertilizer composition.

[0219] (additives) In one embodiment, the resin composition may optionally contain additives as long as the effects of the present disclosure are not impaired. The additives may be used alone or in combination of two or more. Examples of the additives include those described above in relation to the disclosure of the fertilizer composition.

[0220] (Content of each component of resin composition) The content of the reactant in the resin composition is not particularly limited. Examples of the content of the reactant in the resin composition, calculated as nonvolatile content, relative to 100 parts by mass of the resin composition include 100 parts by mass, 95 parts by mass, 90 parts by mass, 85 parts by mass, 80 parts by mass, 75 parts by mass, 70 parts by mass, 65 parts by mass, 60 parts by mass, 55 parts by mass, 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, and 10 parts by mass. In one embodiment, the content of the reactant, in terms of nonvolatile content, relative to 100 parts by mass of the fertilizer composition, is preferably about 10 to 100 parts by mass, more preferably about 10 to 99.8 parts by mass, even more preferably about 30 to 90 parts by mass, and even more preferably about 30 to 79.9 parts by mass.

[0221] The content of the fertilizer in the resin composition is not particularly limited. For example, the content of the fertilizer in the resin composition, in terms of nonvolatile content, relative to 100 parts by mass of the resin composition, is 90 parts by mass, 89.9 parts by mass, 85 parts by mass, 80 parts by mass, 75 parts by mass, 70 parts by mass, 69.9 parts by mass, 65 parts by mass, 60 parts by mass, 55 parts by mass, 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, 10 parts by mass, 9 parts by mass, 8 parts by mass, 7 parts by mass, 6 parts by mass, 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, 0 parts by mass, etc. In one embodiment, the content of the fertilizer, in terms of nonvolatile content, relative to 100 parts by mass of the fertilizer composition, is preferably about 0 to 90 parts by mass, more preferably about 0.1 to 89.9 parts by mass, even more preferably about 9.9 to 69.9 parts by mass, and even more preferably about 20 to 60 parts by mass.

[0222] The content of the additive in the resin composition is not particularly limited. For example, the content of the additive in the resin composition, calculated as nonvolatile content, relative to 100 parts by mass of the resin composition, may be 50 parts by mass, 45 parts by mass, 40 parts by mass, 35 parts by mass, 30 parts by mass, 25 parts by mass, 20 parts by mass, 19 parts by mass, 18 parts by mass, 17 parts by mass, 16 parts by mass, 15 parts by mass, 14 parts by mass, 13 parts by mass, 12 parts by mass, 11 parts by mass, 10 parts by mass, 9 parts by mass, 8 parts by mass, 7 parts by mass, 6 parts by mass, 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, 0.9 parts by mass, 0.8 parts by mass, 0.7 parts by mass, 0.6 parts by mass, 0.5 parts by mass, 0.4 parts by mass, 0.3 parts by mass, 0.2 parts by mass, 0.1 parts by mass, 0 parts by mass, or the like. In one embodiment, the content of the additive, in terms of nonvolatile content, relative to 100 parts by mass of the fertilizer composition, is preferably about 0 to 50 parts by mass, more preferably about 0.1 to 50 parts by mass, even more preferably about 0.1 to 50 parts by mass, and even more preferably about 0.1 to 30 parts by mass.

[0223] (Physical properties of resin composition) The physical properties of the resin composition are not particularly limited.

[0224] In one embodiment, the resin composition is preferably a granular composition (granular resin composition).

[0225] The particle shape of the granular resin composition is not particularly limited, and examples of the particle shape of the granular resin composition include spherical, cylindrical, flake, corrugated, and pellet shapes.

[0226] Examples of particle sizes of the granular resin composition include 50.0 mm, 45.0 mm, 40.0 mm, 35.0 mm, 30.0 mm, 25.0 mm, 20.0 mm, 15.0 mm, 10.0 mm, 9.5 mm, 9.0 mm, 8.5 mm, 8.0 mm, 7.5 mm, 7.0 mm, 6.5 mm, 6.0 mm, 5.5 mm, 5.0 mm, 4.5 mm, 4.0 mm, 3.5 mm, 3.0 mm, 2.5 mm, 2.0 mm, 1.5 mm, 1.0 mm, 0.9 mm, 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm, 0.4 mm, 0.3 mm, 0.2 mm, and 0.1 mm. In one embodiment, the particle size of the granular resin composition is preferably about 0.1 to 50.0 mm, more preferably about 0.1 to 10.0 mm, and even more preferably about 0.1 to 5.0 mm, in order to control the leaching of component (B) into water in the soil.

[0227] (Method of producing resin composition) The method for producing the resin composition is not particularly limited. The resin composition may be obtained by using the reactant as it is, or by mixing the reactant with the fertilizer and the additive as needed, and the method for mixing them is also not particularly limited. The solvent used in the method for producing the reactant may be used as it is as the solvent for the resin composition.

[0228] The method for producing the granular resin composition is not particularly limited, and the granular resin composition can be produced by any of various known granulation methods.

[0229] Examples of the granulation method for the granular resin composition include extrusion granulation, fluidized bed granulation, rolling granulation, compression granulation, coating granulation, and adsorption granulation.

[0230] In the method for producing the granular resin composition, various known granulators can be used. Examples of the granulator include a tumbling granulator, an agitation granulator, a compression granulator, an extrusion granulator, a crushing granulator, and a fluidized bed granulator. As the granulator, an extrusion granulator or a tumbling granulator is preferred because it allows for easy production of the granular resin composition.

[0231] (Method of using the resin composition) The method of use is a method of using the resin composition as a fertilizer, for example, a method of applying the resin composition to the cultivation soil.

[0232] The target soil for the cultivation is not particularly limited, and examples of the soil include those described above in relation to the disclosure of the fertilizer composition.

[0233] The resin composition can be applied to the cultivation soil by, for example, spraying the resin composition on the cultivation soil, irrigating the composition, and / or mixing the resin composition with the cultivation soil, etc. The cultivation soil also includes "seedling soil" for growing plant seedlings that are intended to be transplanted into other soil.

[0234] In the method of applying the resin composition to the cultivation soil, the application time can be, for example, at least one time selected from before sowing, at the time of sowing, at the time of raising seedlings, at the time of transplanting, and at the time of top dressing.

[0235] In the method of applying the resin composition to the cultivation soil, the amount of the resin composition used is not particularly limited. Examples of the amount of the resin composition used, in terms of nonvolatile content, per 100 parts by mass of the cultivation soil include 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, 0.9 parts by mass, 0.8 parts by mass, 0.7 parts by mass, 0.6 parts by mass, 0.5 parts by mass, 0.4 parts by mass, 0.3 parts by mass, 0.2 parts by mass, and 0.1 parts by mass. In one embodiment, the amount of the resin composition used, in terms of nonvolatile content, per 100 parts by mass of the cultivation soil is preferably about 0.1 to 5 parts by mass, more preferably about 0.1 to 1 part by mass, and even more preferably about 0.4 to 1 part by mass.

[0236] In the method of applying the resin composition to the cultivation soil, the amount of the resin composition used, in terms of nonvolatile content, per 10 a of cultivation soil (10 ares, i.e., 1,000 square meters), can be, for example, 5,000 kg, 4,500 kg, 4,000 kg, 3,500 kg, 3,000 kg, 2,500 kg, 2,000 kg, 1,500 kg, 1,000 kg, 900 kg, 800 kg, 700 kg, 600 kg, 500 kg, 400 kg, 300 kg, 200 kg, 100 kg, etc. In one embodiment, the amount of the resin composition used, in terms of nonvolatile content, per 10 a of cultivation soil is preferably about 100 to 5,000 kg, and more preferably about 400 to 1,000 kg.

[0237] In the above-mentioned method of use, the target plants in the cultivation soil are not particularly limited, and examples of the plants include those mentioned above in relation to the disclosure of the fertilizer composition.

[0238] [Cultivation method] The present disclosure relates to a cultivation method for cultivating plants in soil, the cultivation method comprising blending the fertilizer composition or the coated fertilizer into the soil.

[0239] In the above cultivation method, plants are cultivated in soil containing the fertilizer composition or the coated fertilizer, so that the elution of the urea (B) as a fertilizer component is controlled, and a long-term fertilizer effect on the plants can be expected.

[0240] The soil used in the cultivation method is not particularly limited, and examples of the soil include those described above in connection with the disclosure of the fertilizer composition.

[0241] The plants to be cultivated in the above-mentioned cultivation method are not particularly limited, and examples of the plants include those described above in relation to the disclosure of the fertilizer composition.

[0242] In the cultivation method, the method for incorporating the fertilizer composition or the coated fertilizer into soil is not particularly limited, and may be carried out by, for example, spraying, irrigating, and / or mixing the fertilizer composition or the coated fertilizer into soil.

[0243] In the above cultivation method, the timing for blending the fertilizer composition or the coated fertilizer with soil can be at least one selected from, for example, before sowing, at the time of sowing, at the time of raising seedlings, at the time of transplanting, and at the time of top dressing.

[0244] In the cultivation method, the amount of the fertilizer composition or the coated fertilizer used is not particularly limited. Examples of the amount of the fertilizer composition or the coated fertilizer used, calculated as nonvolatile content, per 100 parts by mass of soil include 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, 0.9 parts by mass, 0.8 parts by mass, 0.7 parts by mass, 0.6 parts by mass, 0.5 parts by mass, 0.4 parts by mass, 0.3 parts by mass, 0.2 parts by mass, and 0.1 parts by mass. In one embodiment, the amount of the fertilizer composition or the coated fertilizer used, calculated as nonvolatile content, per 100 parts by mass of soil is preferably about 0.1 to 5 parts by mass, more preferably about 0.1 to 1 part by mass, and even more preferably about 0.4 to 1 part by mass.

[0245] In the cultivation method, the amount of the fertilizer composition or the coated fertilizer used, in terms of nonvolatile content, can be, for example, 5,000 kg, 4,500 kg, 4,000 kg, 3,500 kg, 3,000 kg, 2,500 kg, 2,000 kg, 1,500 kg, 1,000 kg, 900 kg, 800 kg, 700 kg, 600 kg, 500 kg, 400 kg, 300 kg, 200 kg, or 100 kg per 10 a of soil. In one embodiment, the amount of the fertilizer composition or the coated fertilizer used, in terms of nonvolatile content, can be preferably about 100 to 5,000 kg, and more preferably about 400 to 1,000 kg, per 10 a of soil.

[0246] [Cultivating soil] The present disclosure relates to soil and potting compost containing the fertilizer composition or the coated fertilizer.

[0247] Since the culture soil contains the fertilizer composition or the coated fertilizer, when the culture soil is used for sowing seeds and cultivating plants, a long-term fertilizing effect on the plants can be expected.

[0248] The soil in the culture medium is not particularly limited, and examples of the soil include those described above in connection with the disclosure of the fertilizer composition.

[0249] The content of the fertilizer composition or the coated fertilizer in the culture soil is not particularly limited. The content of the fertilizer composition or the coated fertilizer in the culture soil, in terms of nonvolatile content, may be, for example, 5 parts by mass, 4 parts by mass, 3 parts by mass, 2 parts by mass, 1 part by mass, 0.9 parts by mass, 0.8 parts by mass, 0.7 parts by mass, 0.6 parts by mass, 0.5 parts by mass, 0.4 parts by mass, 0.3 parts by mass, 0.2 parts by mass, 0.1 parts by mass, or the like, per 100 parts by mass of soil. In one embodiment, the content of the fertilizer composition or the coated fertilizer in the culture soil, in terms of nonvolatile content, is preferably about 0.1 to 5 parts by mass, more preferably about 0.1 to 1 part by mass, and even more preferably about 0.4 to 1 part by mass, per 100 parts by mass of soil.

[0250] The content of the fertilizer composition or the coated fertilizer in the culture soil, in terms of nonvolatile content, per 10 a of soil (10 ares, i.e., 1,000 square meters), can be, for example, 5,000 kg, 4,500 kg, 4,000 kg, 3,500 kg, 3,000 kg, 2,500 kg, 2,000 kg, 1,500 kg, 1,000 kg, 900 kg, 800 kg, 700 kg, 600 kg, 500 kg, 400 kg, 300 kg, 200 kg, 100 kg, etc. In one embodiment, the content of the fertilizer composition or the coated fertilizer in the culture soil, in terms of nonvolatile content, can be preferably about 100 to 5,000 kg, more preferably about 400 to 1,000 kg, per 10 a of soil.

[0251] The culture soil can be obtained by blending the fertilizer composition or the coated fertilizer with soil. The method for blending the fertilizer composition or the coated fertilizer with soil is not particularly limited. The blending method can be carried out, for example, by spraying, irrigating, and / or mixing the fertilizer composition or the coated fertilizer into soil. [Example]

[0252] The present invention will be described in detail below through examples and comparative examples. However, the above description and the following examples are not intended to limit the present invention. The present invention is limited only by the claims. In the examples, "parts" and "%" are by mass unless otherwise specified.

[0253] The following compounds are shown by abbreviations. AM: acrylamide HEA: Hydroxyethyl acrylate AA: acrylic acid DMAA: N,N-dimethylacrylamide MTA: Methoxyethyl acrylate ATBS: acrylamido-tert-butylsulfonic acid APS: Ammonium persulfate

[0254] <Production of Polymer (A)> Manufacturing Example 1 A reactor equipped with a stirrer, thermometer, reflux condenser, nitrogen gas inlet, and two dropping funnels was charged with 300 parts of ion-exchanged water. After removing oxygen from the reaction system through nitrogen gas, the system was heated to 60°C. Dropping funnel (1) was charged with 74.4 parts of an AM aqueous solution (30 mol %) with a nonvolatile content of 50% (AM 30 mol %), 51.8 parts (30 mol %) of DMAA, 68.0 parts (30 mol %) of MTA, 20.2 parts (10 mol %) of HEA, 2-propanol (also referred to as "IPA" in this disclosure), and 108 parts of ion-exchanged water. Dropping funnel (2) was charged with 0.12 parts of ammonium persulfate and 180 parts of ion-exchanged water. Next, a mixture of ammonium persulfate and ion-exchanged water was added dropwise from dropping funnel (2) over approximately 3 hours. Concurrently, the monomer mixture from dropping funnel (1) was added dropwise at a constant flow rate over approximately 3 hours. After the dropwise addition, 0.12 parts of ammonium persulfate and 10 parts of ion-exchanged water were added and kept warm for 1 hour, and then 40 parts of ion-exchanged water was added to obtain an aqueous solution of polymer (A1) (hereinafter referred to as component (A1)) with a nonvolatile content of 20%.

[0255] Production Examples 2 to 8 and Comparative Production Example 1 The same procedure as in Production Example 1 was carried out, except that the types and amounts of the unsaturated compounds (a1)' to (a4)' used were changed as shown in Table 1, to obtain reaction products.

[0256] (Weight average molecular weight) The weight average molecular weight and molecular weight distribution were measured by gel permeation chromatography (GPC) under the following measurement conditions. GPC body: Tosoh Corporation Column: Guard column PWXL (1 column) and GMPWXL (2 columns) manufactured by Tosoh Corporation (temperature: 40°C) Eluent: 0.5 mol / l acetate buffer (0.5 mol / l acetic acid (manufactured by Wako Pure Chemical Industries, Ltd.) + 0.5 mol / l sodium acetate (manufactured by Kishida Chemical Co., Ltd.) aqueous solution, pH approximately 4.2) Flow rate: 0.8ml / min Detector: Viscotec TDA MODEL301 (concentration detector and 90° light scattering detector) Viscosity detector (temperature 40°C) RALLS method Measurement sample: (A) was diluted with deionized water to a non-volatile concentration of 0.5%, and then sodium hydroxide solution was added until the pH reached 10-12. The sample was immersed in a water bath at 80°C or higher for 1 hour, and then the pH was adjusted to 6-8 with sulfuric acid. The sample was then diluted with the eluent to 0.025% and measured. Measured value: The weight average molecular weight obtained in terms of polyethylene oxide was used as the measured value.

[0257] [Table 1]

[0258] [Production of fertilizer composition] Example 1 A reactor equipped with a stirrer, thermometer, reflux condenser, and nitrogen gas inlet tube was charged with 100 parts (non-volatile content) of the (A1) component from Production Example 1, 100 parts of urea (B1) (hereinafter also referred to as (B1) component) (trade name "Urea", Fujifilm Wako Pure Chemical Industries, Ltd.), and 27 parts (non-volatile content) of a 7.4% formaldehyde aqueous solution (C1) (trade name "Formaldehyde Solution" (Fujifilm Wako Pure Chemical Industries, Ltd.) diluted with 200 parts of ion-exchanged water) (hereinafter also referred to as (C1) component). The mixture was stirred uniformly for 1 hour, and then 20 parts (non-volatile content) of concentrated nitric acid was added and stirred for 30 minutes to react. The precipitate after the reaction was removed and dried in a pure air dryer at 105 ° C. for 3 hours to obtain a reaction product (fertilizer composition).

[0259] Examples 2 to 17 The same procedure as in Example 1 was carried out to obtain reaction products, except that the type and amount of polymer (A) used, and the amounts of ureas (B) and aldehydes (C) used were changed as shown in Table 1.

[0260] Comparative Example 1 In a reactor equipped with a stirrer, thermometer, reflux condenser, and nitrogen gas inlet tube, 100 parts of component (B1) and 27 parts of component (C1) (based on nonvolatile content) were stirred uniformly for 1 hour, and then 20 parts of concentrated nitric acid (based on nonvolatile content) was added and stirred for 30 minutes to allow the reaction to proceed. The precipitate after the reaction was removed and dried in a pure air dryer at 105°C for 3 hours to obtain a reaction product (fertilizer composition).

[0261] Comparative Example 2 In a reaction apparatus equipped with a stirrer, thermometer, reflux condenser, and nitrogen gas inlet tube, 100 parts of component (A1) (based on nonvolatile content) and 100 parts of component (B1) from Production Example 1 were stirred uniformly for 1 hour, and then 20 parts of concentrated nitric acid (based on nonvolatile content) was added and stirred for 30 minutes. The reaction liquid was dried in a pure air dryer at 105°C for 3 hours to obtain a solid.

[0262] Comparative Example 3 In a reactor equipped with a stirrer, thermometer, reflux condenser, and nitrogen gas inlet tube, 100 parts (non-volatile content) of component (A1) and 27 parts (non-volatile content) of component (C1) from Production Example 1 were stirred uniformly for 1 hour, and then 20 parts (non-volatile content) of concentrated nitric acid was added and stirred for 30 minutes to allow the reaction to proceed. The precipitate after the reaction was removed and dried in a pure air dryer at 105°C for 3 hours to obtain a reaction product (fertilizer composition).

[0263] Comparative Example 4 In a reaction apparatus equipped with a stirrer, thermometer, reflux condenser, and nitrogen gas inlet tube, 100 parts of component (A1)' (based on nonvolatile content), 100 parts of component (B1), and 13 parts of component (C1) (based on nonvolatile content) from Comparative Production Example 1 were stirred uniformly for 1 hour, and then 20 parts of concentrated nitric acid (based on nonvolatile content) was added and the mixture was stirred for 30 minutes to allow the reaction to proceed. The precipitate after the reaction was removed and dried in a pure air dryer at 105°C for 3 hours to obtain a reaction product (fertilizer composition).

[0264] (Evaluation of undissolved rate) 0.5 g of the reaction product (fertilizer composition) obtained in each Example and Comparative Example and 10 g of water were placed in a 20 ml sample tube and allowed to stand at room temperature (25°C) for 24 hours. After standing, the sample was filtered through a 360-mesh SUS wire mesh and dried at 105°C for 3 hours. The dried weight was measured and the undissolved rate (%) was calculated using the following formula. The results are shown in Table 2. The higher the undissolved rate, the more controlled the elution of the reaction product (fertilizer composition) into water. Undissolved rate (%) = mass of reactant after drying (g) / 0.5 (g) x 100

[0265] [Table 2] The notes in Table 2 are as follows: *These are the values ​​in parts by mass when converted into non-volatile content.

Claims

1. a fertilizer composition, The fertilizer composition comprises a reactant: The reactant is a reaction product of a polymer (A) including a structural unit (a1) derived from an unsaturated compound containing a primary and / or secondary amide group, and reaction components including ureas (B) and aldehydes (C). Fertilizer composition.

2. 2. The fertilizer composition according to claim 1, wherein the weight average molecular weight of component (A) is 6,000,000 or less.

3. 2. The fertilizer composition according to claim 1, wherein the component (A) comprises at least one structural unit selected from the group consisting of a structural unit (a2) derived from a hydroxyl group-containing unsaturated compound and a structural unit (a3) ​​derived from a carboxyl group-containing unsaturated compound.

4. 4. The fertilizer composition according to claim 3, wherein the total amount of the structural units (a1), (a2), and (a3) ​​in the component (A) is 20 mol% or more, based on 100 mol% of the component (A).

5. A coated fertilizer comprising the fertilizer composition according to claim 1 and a coating that coats the fertilizer composition, The coating includes a resin. Coated fertilizer.

6. The coated fertilizer according to claim 5 , wherein the resin includes a biodegradable resin.

7. A method for using a resin composition containing a reactant as a fertilizer, comprising: The reactant is a reaction product of a polymer (A) containing a structural unit derived from an unsaturated compound containing a primary and / or secondary amide group, and reaction components including a urea (B) and an aldehyde (C). Method of using the resin composition.

8. 8. The method for using the resin composition according to claim 7, wherein the weight average molecular weight of component (A) is 6,000,000 or less.

9. 9. The method for using the resin composition according to claim 7 or 8, wherein the component (A) comprises at least one structural unit selected from the group consisting of a structural unit (a2) derived from a hydroxyl group-containing unsaturated compound and a structural unit (a3) ​​derived from a carboxyl group-containing unsaturated compound.

10. 10. The method for using a resin composition according to claim 9, wherein the total amount of the structural units (a1), (a2), and (a3) ​​in the component (A) is 20 mol% or more, based on 100 mol% of all structural units in the component (A).

11. A cultivation method for growing plants in soil, A cultivation method comprising blending the fertilizer composition according to any one of claims 1 to 4 or the coated fertilizer according to claim 5 or 6 into the soil.

12. A culture medium comprising soil and the fertilizer composition according to any one of claims 1 to 4, or the coated fertilizer according to claim 5 or 6.

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