JP5995340B1 - Seed coating material - Google Patents

Seed coating material Download PDF

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JP5995340B1
JP5995340B1 JP2016090572A JP2016090572A JP5995340B1 JP 5995340 B1 JP5995340 B1 JP 5995340B1 JP 2016090572 A JP2016090572 A JP 2016090572A JP 2016090572 A JP2016090572 A JP 2016090572A JP 5995340 B1 JP5995340 B1 JP 5995340B1
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coating material
seeds
seed
titanium oxide
coated
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JP2017195837A (en
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正昭 一柳
正昭 一柳
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Sumika Agrotech Co Ltd
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Sumika Agrotech Co Ltd
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Priority to CN201780007668.0A priority patent/CN108471708B/en
Priority to PCT/JP2017/015053 priority patent/WO2017187994A1/en
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C1/00Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
    • A01C1/06Coating or dressing seed

Abstract

【課題】酸化チタンの分散性が優れていて保管時に固い沈殿層を形成することがなく、また、被覆加工中に種子同士の付着や、加工槽への付着が少なく、被覆種子の色彩が種皮色の影響を受けずに良好であり、種子からの剥離が起こらず、さらに、発芽性能に悪影響がない被覆材を提供する。【解決手段】酸化チタン、タルク、ポリビニルアルコール、およびエチレン・酢酸ビニル共重合体を含有し、酸化チタンの含有量が10質量%以上40質量%以下であり、酸化チタン:タルクの重量比率が3:1〜0.5:1であり、PVA:EVAの重量比率が3:1〜0.5:1であることを特徴とする。【選択図】なしAn object of the present invention is to disperse titanium oxide without forming a hard precipitate layer during storage, and to prevent seeds from adhering to each other during coating processing and to the processing tank, and the color of the coated seeds is the seed coat. Disclosed is a coating material that is good without being affected by color, does not peel off from seeds, and does not adversely affect germination performance. SOLUTION: Titanium oxide, talc, polyvinyl alcohol, and ethylene / vinyl acetate copolymer are contained, the content of titanium oxide is 10 mass% or more and 40 mass% or less, and the weight ratio of titanium oxide: talc is 3 1 to 0.5: 1, and the weight ratio of PVA: EVA is 3: 1 to 0.5: 1. [Selection figure] None

Description

本発明は、種子用被覆材に関し、より詳細には水懸濁性の種子用被覆材に関するものである。   The present invention relates to a seed coating material, and more particularly to a water-suspendable seed coating material.

種子の種類や品種などは種子の形状からでは識別困難な場合がある。そこで、種子に着色を施し種子の種類や品種を識別容易にすることが行われている。種子に着色を施すための被覆材として、酸化チタンとポリマーとを含有した懸濁性の被覆材がこれまで用いられている。   The type and variety of seeds may be difficult to distinguish from the seed shape. Therefore, coloring seeds to facilitate identification of seed type and variety. A suspension coating material containing titanium oxide and a polymer has been used as a coating material for coloring seeds.

酸化チタンは、隠蔽性の優れた材であり、必要に応じて他の顔料と組み合わせて使用することにより、種子の種皮色の影響を排して、優れた色合いの着色を種子に施すことができる。   Titanium oxide is a material with excellent concealability, and can be used in combination with other pigments as necessary to eliminate the effect of seed coat color and to give the seeds an excellent color. it can.

しかし、ポリマーと酸化チタンを含有した懸濁性の被覆材(懸濁液)は粘着性が高く、種子を被覆加工する際に、種子同士が接着し、あるいは、種子が加工槽に付着するという問題点があった。また、懸濁液の保管中に酸化チタンが沈降して固い沈殿層を形成し、容易に再懸濁することができないという問題点もあった。   However, a suspension coating material (suspension) containing a polymer and titanium oxide is highly sticky, and when seeds are coated, the seeds adhere to each other, or the seeds adhere to the processing tank. There was a problem. In addition, titanium oxide settles during storage of the suspension to form a hard precipitate layer, which cannot be easily resuspended.

そこで、例えば特許文献1では、酸化アルミニウム、二酸化珪素などで表面処理した酸化チタンを用いた種子の被覆材が提案されている。そして、このような表面処理された酸化チタンによれば長期保管しても沈殿物が少なく、再分散性に優れるとされている。   Thus, for example, Patent Document 1 proposes a seed coating material using titanium oxide surface-treated with aluminum oxide, silicon dioxide or the like. And according to such surface-treated titanium oxide, it is said that there is little precipitate even if it is stored for a long time, and it is excellent in redispersibility.

また、特許文献2では、平均粒子径が250μm以下の無機微粒子を所定量以上含む種子用被覆材が提案されている。そして、この種子用被覆材によれば、被覆加工中の種子同士の付着や種子と処理装置への付着が抑制されるとされている。   Patent Document 2 proposes a seed coating material containing a predetermined amount or more of inorganic fine particles having an average particle diameter of 250 μm or less. And according to this seed coating | covering material, it is supposed that adhesion | attachment between the seeds during a coating process and adhesion to a seed and a processing apparatus will be suppressed.

特開平11−146707号公報Japanese Patent Laid-Open No. 11-146707 US2012/0065060US2012 / 0065060

しかしながら、特許文献1の提案技術では、種子同士の付着や処理装置への付着を十分には抑制できないおそれがある。また特許文献2の提案技術では、酸化チタンの濃度を高くした場合は想定されておらず、長期保管による酸化チタンの沈殿について考慮されていない。   However, with the proposed technique of Patent Document 1, there is a possibility that adhesion between seeds and adhesion to a processing apparatus cannot be sufficiently suppressed. Moreover, in the proposal technique of patent document 2, the case where the density | concentration of a titanium oxide is made high is not assumed, and the precipitation of the titanium oxide by long-term storage is not considered.

そこで、本発明の目的は、酸化チタンを含有する種子用被覆材において、酸化チタンの分散性が優れていて保管時に固い沈殿層を形成することがなく、また、被覆加工中に種子同士の付着や、加工槽への付着が少なく、被覆種子の色彩が種皮色の影響を受けずに良好であり、種子からの剥離が起こらず、さらに、発芽性能に悪影響がない被覆材を提供することにある。   Accordingly, an object of the present invention is to provide a seed coating material containing titanium oxide, which has excellent dispersibility of titanium oxide and does not form a hard precipitation layer during storage, and also prevents adhesion between seeds during coating processing. To provide a coating material that has little adhesion to the processing tank, the color of the coated seed is good without being affected by the seed coat color, does not peel off from the seed, and does not adversely affect the germination performance. is there.

本発明によれば、酸化チタン、タルク、ポリビニルアルコール(以下、「PVA」と記すことがある)、およびエチレン・酢酸ビニル共重合体(以下、「EVA」と記すことがある)を含有し、水を含む種子用被覆材における酸化チタンの含有量が10質量%以上40質量%以下であり、酸化チタン:タルクの重量比率が3:1〜0.5:1であり、PVA:EVAの重量比率が3:1〜0.5:1であることを特徴とする水懸濁性の種子用被覆材が提供される。なお、本明細書において「〜」は、特に断りのない限り、その前後に記載の数値を下限値及び上限値として含む意味で使用する。 According to the present invention, it contains titanium oxide, talc, polyvinyl alcohol (hereinafter sometimes referred to as “PVA”), and an ethylene / vinyl acetate copolymer (hereinafter sometimes referred to as “EVA”). The content of titanium oxide in the seed coating material containing water is 10% by mass to 40% by mass, the weight ratio of titanium oxide: talc is 3: 1 to 0.5: 1, and the weight of PVA: EVA A water-suspendable seed coating material having a ratio of 3: 1 to 0.5: 1 is provided. In the present specification, “to” is used in the sense of including the numerical values described before and after it as lower and upper limits unless otherwise specified.

前記構成の種子用被覆材において、酸化チタンの質量平均粒子径は0.1μm以上1μm以下であるのが好ましい。なお、本明細書において「質量平均粒子径」はレーザー回折法粒度分布測定装置を用いて測定した粒子径であり、以下「平均粒子径」と記すことがある。   In the seed coating material having the above structure, the mass average particle diameter of titanium oxide is preferably 0.1 μm or more and 1 μm or less. In the present specification, the “mass average particle diameter” is a particle diameter measured using a laser diffraction particle size distribution analyzer, and may be referred to as “average particle diameter” hereinafter.

また前記構成の種子用被覆材において、タルクの質量平均粒子径は0.1μm以上20μm以下であるのが好ましい。   In the seed coating material having the above structure, the mass average particle diameter of talc is preferably 0.1 μm or more and 20 μm or less.

また本発明によれば、前記のいずれかに記載の種子用被覆材で表面が被覆されていることを特徴とする種子が提供される。   Moreover, according to this invention, the seed characterized by the surface being coat | covered with the seed coating material as described in any one of the above is provided.

本発明の種子用被覆材によれば、保管中の酸化チタンの沈殿物が少なく、再分散性にも優れる。また、被覆加工中に種子同士の付着や加工槽への付着が少なく、被覆種子の色彩が種皮色の影響を受けずに良好である。被覆層の種子からの剥離が起こらず、さらに、発芽性能に悪影響がない。   According to the seed coating material of the present invention, there are few precipitates of titanium oxide during storage, and the redispersibility is also excellent. Moreover, there is little adhesion between seeds and the processing tank during the coating process, and the color of the coated seed is good without being affected by the seed coat color. No peeling of the coating layer from the seed occurs, and there is no adverse effect on germination performance.

本発明の大きな特徴の一つは、水を含む種子用被覆材において酸化チタンを10質量%以上40質量%以下含有することにある。酸化チタンの含有量をこの範囲とすることによって、種子表面の全体を酸化チタンで良好に被覆でき、種皮色の影響を受けずに所望の色に種子を着色できるようになる。より好ましい酸化チタンの含有量は10質量%以上30質量%以下である。 One of the major characteristics of the present invention is that the seed coating material containing water contains titanium oxide in an amount of 10% by mass to 40% by mass. By setting the content of titanium oxide within this range, the entire seed surface can be satisfactorily coated with titanium oxide, and the seed can be colored in a desired color without being affected by the seed coat color. A more preferable content of titanium oxide is 10% by mass or more and 30% by mass or less.

また、酸化チタン:タルクの重量比率が3:1〜0.5:1であることも重要である。酸化チタンとタルクとをこの重量比率で含有することにより、被覆加工中における種子同士の付着や加工槽への酸化チタンの付着が抑制されるといった効果が得られる。また、種皮色の影響を受けずに種子への着色が可能となる。加えて被覆層の種子からの剥離が起こりにくくなり、発芽性能に悪影響もない。   It is also important that the weight ratio of titanium oxide: talc is 3: 1 to 0.5: 1. By containing titanium oxide and talc in this weight ratio, an effect is obtained that adhesion between seeds during coating and adhesion of titanium oxide to the processing tank is suppressed. In addition, the seed can be colored without being affected by the seed coat color. In addition, peeling of the coating layer from the seeds hardly occurs, and there is no adverse effect on germination performance.

さらに、水を含む種子用被覆材において酸化チタンを10質量%以上40質量%以下含有し、酸化チタン:タルクの重量比率が3:1〜0.5:1であることも重要である。酸化チタンの含有量をこの範囲とし、酸化チタンとタルクとをこの重量比率で含有することにより、保管中に酸化チタンが沈降して固い沈殿層を形成することがなく、たとえ沈殿層が形成された場合でも、容易に再懸濁することができる。 Furthermore, it is also important that the seed coating material containing water contains titanium oxide in an amount of 10% by mass to 40% by mass and the weight ratio of titanium oxide: talc is 3: 1 to 0.5: 1. By setting the content of titanium oxide within this range and containing titanium oxide and talc in this weight ratio, the titanium oxide does not settle during storage and forms a hard precipitated layer, even if a precipitated layer is formed. Can be easily resuspended.

本発明で使用する酸化チタンは、平均粒子径が0.1μm以上1μm以下であるものが好ましい。より好ましい平均粒子径は0.1μm以上0.6μm以下である。また、本発明で使用する酸化チタンは、触媒としての活性が低く、熱安定性に優れるルチル型が好ましい。   The titanium oxide used in the present invention preferably has an average particle size of 0.1 μm or more and 1 μm or less. A more preferable average particle diameter is 0.1 μm or more and 0.6 μm or less. In addition, the titanium oxide used in the present invention is preferably a rutile type having low activity as a catalyst and excellent thermal stability.

本発明で使用するタルクは、平均粒子径が0.1μm以上20μm以下であるものが好ましい。より好ましい平均粒子径は0.1μm以上10μm以下である。   The talc used in the present invention preferably has an average particle size of 0.1 μm or more and 20 μm or less. A more preferable average particle diameter is 0.1 μm or more and 10 μm or less.

また本発明では、酸化チタンとタルクとを前記の重量比率で含み、さらにPVAを含むことも重要である。これにより酸化チタンの分散性が向上し、被覆加工中の種子同士の付着や加工槽への酸化チタンの付着が抑制される。また、PVA:EVAの重量比率を3:1〜0.5:1とすることも重要である。これにより、酸化チタンとタルクの種子表面への付着が良好となり、剥離を起こすことがなく、発芽性能に悪影響も与えない。より好ましいPVA:EVAの重量比率は2:1〜1:1である。   In the present invention, it is also important that titanium oxide and talc are contained in the above-mentioned weight ratio and that PVA is further contained. Thereby, the dispersibility of a titanium oxide improves and adhesion of the seeds during a coating process and adhesion of the titanium oxide to a processing tank are suppressed. It is also important that the weight ratio of PVA: EVA is 3: 1 to 0.5: 1. Thereby, adhesion of titanium oxide and talc to the seed surface is improved, peeling does not occur, and germination performance is not adversely affected. A more preferred weight ratio of PVA: EVA is 2: 1 to 1: 1.

本発明で使用するPVAとしては、重量平均分子量が300〜2000の範囲の重合体が好ましく、重量平均分子量400〜1000の重合体がより好ましい。またPVAは完全に(98%〜100%)、中程度に(90〜98%)、部分的に(70〜90%)加水分解されたものが好ましく、部分的(70〜90%)に加水分解されたものがより好ましい。   The PVA used in the present invention is preferably a polymer having a weight average molecular weight in the range of 300 to 2,000, more preferably a polymer having a weight average molecular weight of 400 to 1,000. PVA is preferably completely (98% to 100%), moderately (90 to 98%), partially (70 to 90%) hydrolyzed, and partially (70 to 90%) hydrolyzed. Those decomposed are more preferred.

本発明で使用するEVAとしては、エチレンと酢酸ビニルの重量比率が9:1〜6:4のものが好ましく、より好ましくは重量比率が8:2〜7:3のものである。また、EVAはエマルジョンの形態であることが好ましい。エマルジョンにおける固体濃度は30〜60%が好ましく、粒子サイズは0.1μm〜1μmであることが好ましい。   The EVA used in the present invention preferably has a weight ratio of ethylene to vinyl acetate of 9: 1 to 6: 4, more preferably a weight ratio of 8: 2 to 7: 3. The EVA is preferably in the form of an emulsion. The solid concentration in the emulsion is preferably 30 to 60%, and the particle size is preferably 0.1 μm to 1 μm.

ポリマー成分として、PVAとEVAの外に他のポリマーを添加してもよい。添加可能なポリマーとしては従来公知のものが挙げられる。例えば、ポリビニルピロリドン(PVP)、カルボキシメチルセルロース(CMC)、メチルセルロース、セルロースアセテート、澱粉、ゼラチン等が挙げられる。   As the polymer component, other polymers may be added in addition to PVA and EVA. Examples of the polymer that can be added include conventionally known polymers. For example, polyvinyl pyrrolidone (PVP), carboxymethyl cellulose (CMC), methyl cellulose, cellulose acetate, starch, gelatin and the like can be mentioned.

本発明において粉体成分として酸化チタンとタルクの外に他の粉体成分を添加してもよい。添加可能な粉体成分としては従来公知のものが使用できる。例えば、植物性粉体(小麦粉、木粉等)、鉱物性粉体、(カオリン、ベントナイト、セピオライト、酸性白土等、クレイ類、珪藻土、雲母粉等のシリカ類等)、炭酸カルシウム、アルミナ、活性炭等が挙げられる。   In the present invention, other powder components may be added as a powder component in addition to titanium oxide and talc. Conventionally known powder components can be used as the powder component that can be added. For example, vegetable powder (wheat flour, wood flour, etc.), mineral powder, (kaolin, bentonite, sepiolite, acid clay, clays, diatomaceous earth, silica such as mica powder, etc.), calcium carbonate, alumina, activated carbon Etc.

また、本発明の被覆材においては着色料、界面活性剤、消泡剤、防腐剤、殺菌剤、殺生物剤、殺虫剤、殺線虫剤、除草剤、植物成長調節剤等を適宜配合して使用することも可能である。   In the coating material of the present invention, coloring agents, surfactants, antifoaming agents, preservatives, fungicides, biocides, insecticides, nematicides, herbicides, plant growth regulators and the like are appropriately blended. Can also be used.

着色剤としてはアントラキノン、トリフェニルメタン、フタロシアニン及びその誘導体、及びジアゾニウム塩等が挙げられ、これらを一種または二種以上を組み合わせて使用することができる。着色剤は顔料及び染料のいずれであっても構わない。   Examples of the colorant include anthraquinone, triphenylmethane, phthalocyanine and derivatives thereof, and diazonium salts. These can be used alone or in combination of two or more. The colorant may be a pigment or a dye.

界面活性剤としては、非イオン系界面活性剤として、例えば、石鹸類、ポリオキシエチレンアルキルエーテル類、ポリオキシエチレンアルキルアリルエーテル類、ポリオキシエチレンアルキルフェニルエーテル類、ポリオキシエチレンノニルフェニルエーテル類、ポリオキシエチレンポリオキシプロピレンエーテル類、ポリオキシエチレンジスチレン化フェニルエーテル、ポリオキシエチレンアルキルエステル類、ソルビタン脂肪酸エステル、ポリオキシエチレンソルビタン脂肪酸エステル類、高級脂肪酸アルカノールアマイド、アルキルマレイン酸共重合物、多価アルコールエステル類等が挙げられ、陽イオン系界面活性剤として、例えば、アルキルアミン塩、第4級アンモニウム塩等が挙げられ、陰イオン系界面活性剤として、例えば、ナフタレンスルホン酸重縮合物金属塩、ナフタレンスルホン酸塩のホルマリン縮合物、アルキルナフタレンスルホン酸塩、リグニンスルホン酸金属塩、アルキルアリルスルホン酸塩、アルキルアリルスルホネート硫酸塩等の高分子化合物、ポリスチレンスルホン酸ナトリウム塩、ポリカルボン酸金属塩、ポリオキシエチレンヒスチジルフェニルエーテルサルフェートアンモニウム、高級アルコールスルホン酸塩、高級アルコールエーテルスルホン酸塩、ジアルキルスルホサクシネートまたは高級脂肪酸アルカリ金属塩等が挙げられ、これらは一種以上を適当な割合で混合して適宜使用することができる。   As the surfactant, for example, soaps, polyoxyethylene alkyl ethers, polyoxyethylene alkyl allyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene nonyl phenyl ethers, Polyoxyethylene polyoxypropylene ethers, polyoxyethylene distyrenated phenyl ether, polyoxyethylene alkyl esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, higher fatty acid alkanolamides, alkylmaleic acid copolymers, many Examples of the cationic surfactant include alkylamine salts and quaternary ammonium salts. Examples of the anionic surfactant include: Polyphthalene sulfonic acid polycondensate metal salt, formalin condensate of naphthalene sulfonate, alkyl naphthalene sulfonate, lignin sulfonic acid metal salt, alkyl allyl sulfonate, alkyl allyl sulfonate sulfate and other high molecular compounds, polystyrene sulfone Acid sodium salt, polycarboxylic acid metal salt, polyoxyethylene histidyl phenyl ether sulfate ammonium, higher alcohol sulfonate, higher alcohol ether sulfonate, dialkyl sulfosuccinate or higher fatty acid alkali metal salt, etc. Can be used as appropriate by mixing one or more of them in an appropriate ratio.

消泡剤としては、シリコン系消泡剤、ステアリン酸マグネシウム、長鎖アルコール、脂肪酸およびそれらの塩等が挙げられ、これらは一種以上を適当な割合で混合して適宜使用することができる。   Examples of the antifoaming agent include silicon-based antifoaming agents, magnesium stearate, long-chain alcohols, fatty acids and salts thereof, and these can be used as appropriate by mixing one or more thereof in an appropriate ratio.

防腐剤としては、1,2−ベンズイソチアゾリン−3−オン、ブチルパラベン、ソルビン酸カリウム等が挙げられ、これらは一種以上を適当な割合で混合して適宜使用することができる。   Examples of the preservative include 1,2-benzisothiazolin-3-one, butylparaben, potassium sorbate and the like, and these can be used as appropriate by mixing one or more thereof in an appropriate ratio.

殺菌剤としては、キャプタン、チウラム、メタラキシル、イプロジオン、フルトラニル、メプロニル、メフォノキサム等が挙げられ、これらは一種以上を適当な割合で混合して適宜使用することができる。   Examples of the disinfectant include captan, thiuram, metalaxyl, iprodione, flutolanil, mepronil, mefonoxam, and the like, which can be used as appropriate by mixing one or more of them in an appropriate ratio.

殺生物剤としては、ストレプトマイシン、ペニシリン、テトラサイクリン、アンピシリン、オキソリン酸等が挙げられ、これらは一種以上を適当な割合で混合して適宜使用することができる。   Examples of the biocide include streptomycin, penicillin, tetracycline, ampicillin, oxophosphoric acid, and the like, and these can be used as appropriate by mixing one or more of them in an appropriate ratio.

殺虫剤としては、ピレスロイド、有機ホスフェート、カラモイルオキシム、ピラゾール、アミジン、ハロゲン化炭化水素、ネオニコチノイド、及びカーバメート等が挙げられ、これらは一種以上を適当な割合で混合して適宜使用することができる。   Examples of insecticides include pyrethroids, organic phosphates, calamoyl oximes, pyrazoles, amidines, halogenated hydrocarbons, neonicotinoids, and carbamates, and these should be used as appropriate by mixing one or more of them in an appropriate ratio. Can do.

殺線虫剤としては、アバメクチン、チオジカーブなどが挙げられ、これらは一種以上を適当な割合で混合して適宜使用することができる。   Examples of the nematicide include abamectin, thiodicarb, etc., and these can be used as appropriate by mixing one or more of them in an appropriate ratio.

(被覆材の使用方法)
本発明の被覆材は原液のままで使用してもよいし、あるいは種子の種類や加工機によっては適宜希釈して使用してもよい。
(How to use the coating material)
The coating material of the present invention may be used as it is, or may be appropriately diluted depending on the type of seed and the processing machine.

(種子への被覆加工)
本発明の被覆材によって種子を被覆する方法としては、従来公知の加工方法、処理装置を用いることができる。加工方法としては種子との混合、機械的な塗布、噴霧、および浸漬等を使用できる。被覆に用いられる装置としては、例えば流動層乾燥式種子処理装置やroto−stat式種子処理装置等が好適に使用できる。
(Seed coating)
As a method of coating seeds with the coating material of the present invention, a conventionally known processing method and processing apparatus can be used. As the processing method, mixing with seeds, mechanical application, spraying, dipping and the like can be used. As an apparatus used for coating, for example, a fluidized bed drying type seed processing apparatus or a roto-stat type seed processing apparatus can be preferably used.

具体的には、被覆装置に種子を入れ、被覆装置中で撹拌(転動)させながら、被覆材又はその水溶液を噴霧する。そして種子表面を被覆材で被覆した後、必要により被覆種子を乾燥させる。乾燥温度は、通常、品温50℃以下、好ましくは25℃以上50℃以下で行われる。   Specifically, seeds are put in the coating apparatus, and the coating material or an aqueous solution thereof is sprayed while stirring (rolling) in the coating apparatus. Then, after coating the seed surface with a coating material, the coated seed is dried if necessary. The drying temperature is usually 50 ° C. or lower, preferably 25 ° C. or higher and 50 ° C. or lower.

(被覆対象種子)
本発明の被覆材で被覆可能な種子は、特に限定されるものではなく、例えば野菜種子、草花種子、牧草種子、野草種子、穀物種子及び工芸作物種子が挙げられ、詳しくは以下のものが挙げられる。
(Coated seed)
The seeds that can be coated with the coating material of the present invention are not particularly limited, and examples thereof include vegetable seeds, flower seeds, grass seeds, wild grass seeds, cereal seeds, and craft crop seeds. It is done.

野菜種子としては、例えばキュウリ、メロン、カボチャ等のウリ科の野菜種子;ナス、トマト等のナス科の野菜種子;エンドウ、インゲン等のマメ科の野菜種子;タマネギ、ネギ等のユリ科の野菜種子;カブ、ハクサイ、キャベツ、ブロッコリー等のブラシカ属及びダイコンなどのアブラナ科の野菜種子;ニンジン、セロリ等のセリ科の野菜種子;ゴボウ、レタス、シュンギク等のキク科の野菜種子;シソ等のシソ科の野菜種子;ホウレンソウ等のアカザ科の野菜種子等が挙げられる。   Examples of vegetable seeds include cucumber, melon, pumpkin and other cucurbitaceae vegetable seeds; eggplant, tomato and other solanaceous vegetable seeds; peas and kidney beans and other leguminous vegetable seeds; Seeds; Brassicaceae vegetable seeds such as Brassica genus such as turnip, Chinese cabbage, cabbage, broccoli, and radish; Vegetable seeds of Caceae family such as carrot, celery; Vegetable seeds of Lamiaceae; vegetable seeds of red crustaceae such as spinach.

草花種子としては、例えばハボタン、ストック、アリッサム等のアブラナ科の草花種子、例えばロベリア等のキキョウ科の草花種子、例えばアスター、ジニア、ヒマワリ等のキク科の草花種子、例えばデルフィニウム等のキンポウゲ科の草花種子、例えばキンギョソウ等のゴマノハグサ科の草花種子、例えばプリムラ等のサクラソウ科の草花種子、例えばベゴニア等のシュウカイドウ科の草花種子、例えばサルビア等のシソ科の草花種子、例えばパンジー、ビオラ等のスミレ科の草花種子、例えばペチュニア等のナス科の草花種子、例えばユーストマ等のリンドウ科の草花種子等が挙げられる。   As the flower seeds, for example, flower seeds of Brassicaceae such as ha button, stock, alyssum, etc., flower seeds of the asteraceae such as Lobelia, for example, flower seeds of the asteraceae such as aster, zinnia, sunflower, etc., for example of the buttercup family such as delphinium Flower seeds such as primroses such as snapdragons, flower seeds such as primulas such as primula, flower seeds such as rhododendrons such as begonia, and flower seeds such as Labiatae such as salvia, such as violets such as pansy and viola For example, plant seeds of solanaceae such as petunia, and plant seeds of gentian family such as eustoma.

牧草種子としては、例えば、チモシー、イタリアンライグラス、バーミューダグラス、燕麦、スーダングラス、クレイングラス、フェスク、オーチャードグラス等の牧草種子が挙げられる。   Examples of the grass seeds include grass seeds such as timothy, Italian ryegrass, Bermuda grass, buckwheat, Sudan grass, crane grass, fescue and orchard grass.

野草種子としては、例えば、アルファルファ、クローバー等のマメ科の野草種子、例えばメヒシバ等のイネ科の野草種子等が挙げられる。   Examples of wild grass seeds include leguminous wild grass seeds such as alfalfa and clover, for example, grass grass seeds such as barracuda.

穀物種子としては、例えば、イネ、オオムギ、コムギ、ダイズ、アワ、ヒエ、キビ等が挙げられる。   Examples of cereal seeds include rice, barley, wheat, soybean, millet, millet, and millet.

工芸作物種子としては、例えば、テンサイなどのアカザ科種子、タバコなどのナス科種子、ナタネなどのアブラナ科種子、イグサ等のイネ科種子が挙げられる。   Examples of the craft crop seed include red crustacean seeds such as sugar beet, solanaceous seeds such as tobacco, cruciferous seeds such as rapeseed, and gramineous seeds such as rush.

(前処理及び後処理)
被覆対象の種子は、本発明の被覆材で被覆される前に、予め、従来公知の方法によって被覆造粒されていてもよい。また、除菌、発芽改良等のための処理が施されていてもよい。あるいはまた、本発明の被覆材によって被覆された後に、被覆造粒や除菌、発芽改良等のための処理が施されてもよい。
(Pre-processing and post-processing)
The seed to be coated may be coated and granulated in advance by a conventionally known method before being coated with the coating material of the present invention. Moreover, the process for disinfection, germination improvement, etc. may be given. Alternatively, after coating with the coating material of the present invention, treatment for coating granulation, sterilization, germination improvement, and the like may be performed.

実施例1
(被覆材の作製)
75重量部の水にポリビニルアルコール25重量部を懸濁させ、95℃に加熱して溶解させ、濃度25%のポリビニルアルコール水溶液を得た。
また、1Lのビーカーに水11.4重量部を入れ、撹拌しながら非イオン系界面活性剤0.3重量部、陰イオン系界面活性剤0.3重量部を添加した。次いで、タルク(平均粒子径10μm)15重量部、酸化チタン(ルチル型、平均粒子径0.3μm)30重量部をさらに添加して10分間撹拌した。次に、前記作製した濃度25%のポリビニルアルコール水溶液を20重量部、エチレン酢酸ビニル共重合体の50%エマルジョンを5.0重量部、顔料としての水系分散体(モノアゾ系赤色)18重量部を添加し、約30分間撹拌した。なお、すべての混合は室温で実施した。得られた被覆材の沈殿性及び再分散性を後述の方法で評価した。評価結果を表2に示す。
Example 1
(Preparation of coating material)
25 parts by weight of polyvinyl alcohol was suspended in 75 parts by weight of water, and dissolved by heating to 95 ° C. to obtain a polyvinyl alcohol aqueous solution having a concentration of 25%.
Further, 11.4 parts by weight of water was placed in a 1 L beaker, and 0.3 parts by weight of a nonionic surfactant and 0.3 parts by weight of an anionic surfactant were added while stirring. Next, 15 parts by weight of talc (average particle diameter 10 μm) and 30 parts by weight of titanium oxide (rutile type, average particle diameter 0.3 μm) were further added and stirred for 10 minutes. Next, 20 parts by weight of the prepared 25% polyvinyl alcohol aqueous solution, 5.0 parts by weight of 50% emulsion of ethylene vinyl acetate copolymer, and 18 parts by weight of an aqueous dispersion (monoazo red) as a pigment were added. Added and stirred for about 30 minutes. All mixing was performed at room temperature. The precipitation property and redispersibility of the obtained coating material were evaluated by the methods described below. The evaluation results are shown in Table 2.

(被覆種子の作製)
得られた被覆材15mLに水10mLを加えて希釈液を作製した。そして、roto−stat式種子処理装置を用いてキャベツ種子200gを希釈液8mLで被覆した。
得られた被覆種子の外観(着色状態)及び被覆層の種子からの剥離性について後述の方法で評価した。評価結果を表2に合わせて示す。加えて、処理装置の内壁等への被覆材の付着状態を後述の方法で評価した。評価結果を表2に合わせて示す。
また、得られた被覆種子の発芽率を下記の方法で測定したところ、被覆していない種子と同等であった。
(発芽試験)
ろ紙2枚を敷いた直径9cmのシャーレを用意し、そこに水4.5mLを滴下した後、被覆種子50粒をそれぞれ置床し、温度20℃で約2000ルクスの光条件下で保存して7日目の発芽率(%)を測定した。
(Production of coated seeds)
10 mL of water was added to 15 mL of the obtained coating material to prepare a diluted solution. Then, 200 g of cabbage seed was coated with 8 mL of the diluent using a roto-stat type seed treatment device.
The appearance (colored state) of the obtained coated seed and the peelability of the coating layer from the seed were evaluated by the methods described below. The evaluation results are shown in Table 2. In addition, the adhesion state of the coating material to the inner wall or the like of the processing apparatus was evaluated by the method described later. The evaluation results are shown in Table 2.
Moreover, when the germination rate of the obtained coated seeds was measured by the following method, it was the same as that of uncoated seeds.
(Germination test)
Prepare a petri dish with a diameter of 9 cm on which two filter papers are laid, drop 4.5 ml of water onto it, place 50 seeds of each seed, store at 20 ° C under light conditions of about 2000 lux, and store 7 The germination rate (%) on the day was measured.

実施例2
水を8.4重量部、濃度25%のポリビニルアルコール水溶液を24重量部、エチレン酢酸ビニル共重合体の50%エマルジョンを4.0重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Example 2
A coating material was prepared in the same manner as in Example 1 except that 8.4 parts by weight of water, 24 parts by weight of an aqueous polyvinyl alcohol solution having a concentration of 25%, and 4.0 parts by weight of a 50% emulsion of ethylene-vinyl acetate copolymer were used. The seeds were produced and coated with the produced coating material. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

実施例3
水を12.4重量部、濃度25%のポリビニルアルコール水溶液を16重量部、エチレン酢酸ビニル共重合体の50%エマルジョンを8.0重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Example 3
A coating material was prepared in the same manner as in Example 1 except that 12.4 parts by weight of water, 16 parts by weight of an aqueous polyvinyl alcohol solution having a concentration of 25%, and 8.0 parts by weight of a 50% emulsion of an ethylene vinyl acetate copolymer were used. The seeds were produced and coated with the produced coating material. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

実施例4
水を14.4重量部、濃度25%のポリビニルアルコール水溶液を12重量部、エチレン酢酸ビニル共重合体の50%エマルジョンを10重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Example 4
A coating material was prepared in the same manner as in Example 1 except that 14.4 parts by weight of water, 12 parts by weight of an aqueous polyvinyl alcohol solution having a concentration of 25%, and 10 parts by weight of a 50% emulsion of ethylene-vinyl acetate copolymer were used. Then, the seed was coated with the prepared coating material. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

実施例5
水を11.4重量部、タルク(平均粒子径10μm)を11.25重量部、酸化チタンを(ルチル型、平均粒子径0.3μm)33.75重部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Example 5
Example 1 except that 11.4 parts by weight of water, 11.25 parts by weight of talc (average particle size 10 μm) and 33.75 parts by weight of titanium oxide (rutile type, average particle size 0.3 μm) were used. Then, a coating material was produced, and the seed was coated with the produced coating material. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

実施例6
水を11.4重量部、タルク(平均粒子径10μm)を22.5重量部、酸化チタン(ルチル型、平均粒子径 0.3μm)を22.5重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Example 6
Example 1 except that 11.4 parts by weight of water, 22.5 parts by weight of talc (average particle size 10 μm) and 22.5 parts by weight of titanium oxide (rutile type, average particle size 0.3 μm) were used. Then, a coating material was produced, and the seed was coated with the produced coating material. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

実施例7
水を6.4重量部、酸化チタン(ルチル型、平均粒子径 0.3μm)を35重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Example 7
A coating material was prepared in the same manner as in Example 1 except that 6.4 parts by weight of water and 35 parts by weight of titanium oxide (rutile type, average particle size 0.3 μm) were used. Covered. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

実施例8
水を21.4重量部、酸化チタン(ルチル型、平均粒子径 0.3μm)を20重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Example 8
A coating material was prepared in the same manner as in Example 1 except that 21.4 parts by weight of water and 20 parts by weight of titanium oxide (rutile type, average particle size 0.3 μm) were used. Covered. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

実施例9
水を31.4重量部、酸化チタン(ルチル型、平均粒子径0.3μm)を10重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Example 9
A coating material was prepared in the same manner as in Example 1 except that 31.4 parts by weight of water and 10 parts by weight of titanium oxide (rutile type, average particle size 0.3 μm) were used. Covered. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

比較例1
水を9.4重量部、エチレン酢酸ビニル共重合体の50%エマルジョンを3.0重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Comparative Example 1
A coating material was prepared in the same manner as in Example 1 except that 9.4 parts by weight of water and 3.0 parts by weight of a 50% emulsion of ethylene vinyl acetate copolymer were used, and the seeds were coated with the prepared coating material. did. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

比較例2
(被覆材の調製)
水を11.4重量部、タルク(平均粒子径10μm)を10重量部、酸化チタン(ルチル型、平均粒子径0.3μm)を35重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Comparative Example 2
(Preparation of coating material)
Coating material in the same manner as in Example 1 except that 11.4 parts by weight of water, 10 parts by weight of talc (average particle size 10 μm), and 35 parts by weight of titanium oxide (rutile type, average particle size 0.3 μm) were used. And seeds were coated with the prepared coating material. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

比較例3
水を36.4重量部、酸化チタン(ルチル型、平均粒子径0.3μm)を5重量部とした以外は実施例1と同様にして被覆材を作製し、そして作製した被覆材で種子を被覆した。被覆材の沈殿性及び再分散性、被覆種子の外観及び被覆層の剥離性、処理装置内の被覆材の付着状態を実施例1と同様にして評価した。評価結果を表2に合わせて示す。
Comparative Example 3
A coating material was prepared in the same manner as in Example 1 except that 36.4 parts by weight of water and 5 parts by weight of titanium oxide (rutile type, average particle size 0.3 μm) were used. Covered. The sedimentation property and redispersibility of the coating material, the appearance of the coated seed and the peelability of the coating layer, and the adhesion state of the coating material in the treatment apparatus were evaluated in the same manner as in Example 1. The evaluation results are shown in Table 2.

実施例10
実施例1と同様にして被覆材を得た。得られた被覆材20mLに水20mLを加えて希釈液を作製した。roto−stat式種子処理装置を用いて、ニンジン種子200gを希釈液24mLで被覆した。
得られた被覆種子の外観(着色状態)及び被覆層の種子からの剥離性について後述の方法で評価した。評価結果を表2に合わせて示す。
また、得られた被覆種子の発芽率を下記の方法で測定したところ、被覆していない種子と同等であった。
(発芽試験)
ろ紙2枚を敷いた直径9cmのシャーレを用意し、そこに水4.5mLを滴下した後、被覆種子50粒をそれぞれ置床し、温度20℃で約900ルクスの光条件下で保存して10日目の発芽率(%)を測定した。
Example 10
A coating material was obtained in the same manner as in Example 1. 20 mL of water was added to 20 mL of the obtained coating material to prepare a diluted solution. Using a roto-stat type seed treatment apparatus, 200 g of carrot seeds were coated with 24 mL of a diluent.
The appearance (colored state) of the obtained coated seed and the peelability of the coating layer from the seed were evaluated by the methods described below. The evaluation results are shown in Table 2.
Moreover, when the germination rate of the obtained coated seeds was measured by the following method, it was the same as that of uncoated seeds.
(Germination test)
Prepare a petri dish with a diameter of 9 cm with two filter papers, drop 4.5 mL of water on it, place 50 seeds of each seed, store at 20 ° C. under light conditions of about 900 lux, and store 10 The germination rate (%) on the day was measured.

実施例11
実施例11と同様にして、ホウレンソウ種子200gを希釈液16mLで被覆した。
得られた被覆種子の外観(着色状態)及び被覆層の種子からの剥離性について後述の方法で評価した。評価結果を表2に合わせて示す。
また、得られた被覆種子の発芽率を下記の方法で測定したところ、被覆していない種子と同等であった。
(発芽試験)
長さ60cm、2.5cm幅で蛇腹状に折ったろ紙に5粒×10列になるように種子を挟み込み、そこに水15mLを滴下した後、温度25℃で約2000ルクスの光条件下で保存して7日目の発芽率(%)を測定した。
Example 11
In the same manner as in Example 11, 200 g of spinach seeds were coated with 16 mL of diluent.
The appearance (colored state) of the obtained coated seed and the peelability of the coating layer from the seed were evaluated by the methods described below. The evaluation results are shown in Table 2.
Moreover, when the germination rate of the obtained coated seeds was measured by the following method, it was the same as that of uncoated seeds.
(Germination test)
The seeds were sandwiched in 5 × 10 rows on a filter paper folded in a bellows shape with a length of 60 cm and a width of 2.5 cm, and after dropping 15 mL of water there, under a light condition of about 2000 lux at a temperature of 25 ° C. The germination rate (%) on the seventh day after storage was measured.

実施例12
実施例11と同様にして、ゴボウ種子200gを、希釈液16mLで被覆した。
得られた被覆種子の外観(着色状態)及び被覆層の種子からの剥離性について後述の方法で評価した。評価結果を表2に合わせて示す。
また、得られた被覆種子の発芽率を実施例12と同じ方法で測定したところ、被覆していない種子と同等であった。
Example 12
In the same manner as in Example 11, 200 g of burdock seeds were coated with 16 mL of diluent.
The appearance (colored state) of the obtained coated seed and the peelability of the coating layer from the seed were evaluated by the methods described below. The evaluation results are shown in Table 2.
Moreover, when the germination rate of the obtained coated seed was measured by the same method as in Example 12, it was the same as that of the uncoated seed.

実施例13
実施例11と同様にして、スイカ種子200gを、希釈液16mLで被覆した。
得られた被覆種子の外観(着色状態)及び被覆層の種子からの剥離性について後述の方法で評価した。評価結果を表2に合わせて示す。
また、得られた被覆種子の発芽率を下記の方法で測定したところ、被覆していない種子と同等であった。
(発芽試験)
長さ60cm、2.5cm幅で蛇腹状に折ったろ紙に4粒×10列になるように種子を挟み込み、そこに水15mLを滴下した後、温度30℃で約900ルクスの光条件下で保存して7日目の発芽率(%)を測定した。
Example 13
In the same manner as in Example 11, 200 g of watermelon seed was coated with 16 mL of the diluent.
The appearance (colored state) of the obtained coated seed and the peelability of the coating layer from the seed were evaluated by the methods described below. The evaluation results are shown in Table 2.
Moreover, when the germination rate of the obtained coated seeds was measured by the following method, it was the same as that of uncoated seeds.
(Germination test)
The seeds were sandwiched in 4 × 10 rows on a filter paper folded in a bellows shape with a length of 60 cm and a width of 2.5 cm, and after dropping 15 mL of water there, under a light condition of about 900 lux at 30 ° C. The germination rate (%) on the seventh day after storage was measured.

実施例14
実施例11と同様にして、スイートコーン種子200gを、希釈液16mLで被覆した。
得られた被覆種子の外観(着色状態)及び被覆層の種子からの剥離性について後述の方法で評価した。評価結果を表2に合わせて示す。
また、得られた被覆種子の発芽率を下記の方法で測定したところ、被覆していない種子と同等であった。
(発芽試験)
長さ60cm、2.5cm幅で蛇腹状に折ったろ紙に2粒×10列になるように種子を挟み込み、そこに水15mLを滴下した後、温度25℃で約2000ルクスの光条件下で保存して7日目の発芽率(%)を測定した。
Example 14
In the same manner as in Example 11, 200 g of sweet corn seed was coated with 16 mL of the diluent.
The appearance (colored state) of the obtained coated seed and the peelability of the coating layer from the seed were evaluated by the methods described below. The evaluation results are shown in Table 2.
Moreover, when the germination rate of the obtained coated seeds was measured by the following method, it was the same as that of uncoated seeds.
(Germination test)
The seeds were sandwiched in a filter paper folded in a bellows shape with a length of 60 cm and a width of 2.5 cm, and after dropping 15 mL of water there, under a light condition of about 2000 lux at a temperature of 25 ° C. The germination rate (%) on the seventh day after storage was measured.

(加工性)
処理装置の内壁等への被覆材の付着状態を目視により下記基準で評価した。
「○」:全く付着なし。
「△」:わずかに付着あり。
「×」:大量に付着あり。
(Processability)
The state of adhesion of the coating material to the inner wall or the like of the processing apparatus was evaluated visually according to the following criteria.
“O”: No adhesion.
“△”: Slightly adhered.
“×”: Large amount of adhesion.

(沈殿層の有無)
被覆材10mLを15mLの試験管に入れ、14日間静置後に目視によって下記基準で評価した。
「○」:沈殿分離なし。
「△」:不明瞭ながら沈殿層あり。
「×」:沈殿層あり。
(Presence of precipitation layer)
10 mL of the covering material was put in a 15 mL test tube, and after standing for 14 days, it was visually evaluated according to the following criteria.
“O”: No precipitation separation.
“△”: There is a precipitate layer although it is unclear.
“×”: Precipitation layer is present.

(再分散性)
沈殿層の有無の評価試験において沈殿層が形成された被覆材について、試験管を上下に5回撹拌し目視によって再分散性を下記基準で評価した。
「○」:容易に再分散できる。
「△」:撹拌によって概ね再分散できる。
「×」:撹拌しても再分散できない。
(Redispersibility)
About the coating material in which the precipitation layer was formed in the evaluation test of the presence or absence of the precipitation layer, the test tube was stirred up and down 5 times, and the redispersibility was visually evaluated according to the following criteria.
“◯”: Can be easily redispersed.
“Δ”: Redispersed substantially by stirring.
“×”: Cannot be redispersed even with stirring.

(外観)
被覆種子の外観(着色状態)を目視により下記基準で評価した。
「○」:着色良好。
「△」:着色にややくすみ有り。
「×」:着色が不十分。
(appearance)
The appearance (colored state) of the coated seed was visually evaluated according to the following criteria.
“◯”: Good coloring.
“△”: Slightly dull in coloring.
“×”: Coloring is insufficient.

(被覆層の剥離)
被覆種子5gを50mLスチロール棒瓶に封入し、30分振盪した後、剥離状態を目視によって下記基準で評価した。
「○」:まったく剥離なし。
「△」:わずかに剥離あり。
「×」:大量の剥離あり。
(Removal of coating layer)
After 5 g of the coated seeds were sealed in a 50 mL polystyrene bar and shaken for 30 minutes, the peeled state was visually evaluated according to the following criteria.
“◯”: No peeling at all.
“△”: Slight peeling.
"X": There is a large amount of peeling.

実施例2〜4の被覆材は、実施例1の被覆材を基準としてPVAとEVAとの重量比率を3:1〜0.6:1の範囲で変えたものであり、実施例5〜9の被覆材は、実施例1の被覆材を基準として酸化チタンとタルクとの重量比率を3:1〜0.66:1の範囲で変えたものであって、いずれの被覆材も加工性、沈殿層の有無、再分散性、外観、剥離の各評価項目において実使用上問題はなかった。   The coating materials of Examples 2 to 4 were obtained by changing the weight ratio of PVA and EVA in the range of 3: 1 to 0.6: 1 based on the coating material of Example 1, and Examples 5 to 9 The coating material was obtained by changing the weight ratio of titanium oxide and talc in the range of 3: 1 to 0.66: 1 on the basis of the coating material of Example 1, and all the coating materials were workable, There were no problems in actual use in each evaluation item of presence / absence of a precipitate layer, redispersibility, appearance, and peeling.

これに対して、PVAとEVAとの重量比率が4:1と本発明の規定範囲を超えた比較例1の被覆材では、加工性が悪く処理装置の内壁等への被覆材の大量の付着が見られた。また、被覆層の種子からの大量の剥離が見られた。   On the other hand, with the coating material of Comparative Example 1 in which the weight ratio of PVA to EVA was 4: 1 and exceeded the specified range of the present invention, workability was poor and a large amount of coating material adhered to the inner wall of the processing apparatus. It was observed. Further, a large amount of peeling from the seed of the coating layer was observed.

また、酸化チタンとタルクとの重量比率が3.5:1と本発明の規定範囲を超えた比較例2の被覆材では、被覆層の種子からの大量の剥離が見られた。反対に、酸化チタンとタルクとの重量比率が0.33:1と本発明の規定範囲よりも小さく、しかも酸化チタンの含有量が5質量%と少ない比較例3の被覆材では、種子の着色が不十分であった。加えて、沈殿層が形成され撹拌しても再分散しなかった。   Moreover, in the coating material of Comparative Example 2 in which the weight ratio of titanium oxide to talc was 3.5: 1 which exceeded the specified range of the present invention, a large amount of peeling from the seed of the coating layer was observed. On the other hand, in the coating material of Comparative Example 3 in which the weight ratio of titanium oxide to talc is 0.33: 1 which is smaller than the specified range of the present invention and the content of titanium oxide is as small as 5% by mass, seed coloring Was insufficient. In addition, a precipitate layer was formed and did not redisperse even when stirred.

また、実施例10〜14は、実施例1で作製した被覆材を用いて種子形状の異なるニンジン、ホウレンソウ、ゴボウ、スイカ、スイートコーンの各種子を被覆したものであって、いずれの実施例においても実施例1のキャベツ種子の場合と同様に、加工性、沈殿層の有無、再分散性、外観の各評価項目についてまったく問題はなかった。また、被覆層の種子からの剥離についても実使用上問題のレベルであった。   In addition, Examples 10 to 14 were obtained by coating various seeds of carrots, spinach, burdock, watermelon, and sweet corn with different seed shapes using the coating material prepared in Example 1, and in any Example As in the case of cabbage seeds of Example 1, there were no problems at all for the evaluation items of processability, presence or absence of a precipitate layer, redispersibility, and appearance. In addition, peeling of the coating layer from the seeds was at a problem level in practical use.

本発明の種子用被覆材によれば、保管中の酸化チタンの沈殿物が少なく、再分散性にも優れる。また、被覆加工中に種子同士の付着や加工槽への付着が少なく、被覆種子の色彩が種皮色の影響を受けずに良好である。被覆層の種子からの剥離が起こらず、さらに、発芽性能に悪影響がなく有用である。   According to the seed coating material of the present invention, there are few precipitates of titanium oxide during storage, and the redispersibility is also excellent. Moreover, there is little adhesion between seeds and the processing tank during the coating process, and the color of the coated seed is good without being affected by the seed coat color. Peeling from the seed of the coating layer does not occur, and the germination performance is not adversely affected.

Claims (4)

酸化チタン、タルク、ポリビニルアルコール、およびエチレン・酢酸ビニル共重合体を含有し、
水を含む種子用被覆材における酸化チタンの含有量が10質量%以上40質量%以下であり、
酸化チタン:タルクの重量比率が3:1〜0.5:1であり、
ポリビニルアルコール:エチレン・酢酸ビニル共重合体の重量比率が3:1〜0.5:1であることを特徴とする水懸濁性の種子用被覆材。
Contains titanium oxide, talc, polyvinyl alcohol, and ethylene / vinyl acetate copolymer,
The content of titanium oxide in the seed coating material containing water is 10% by mass or more and 40% by mass or less,
The weight ratio of titanium oxide: talc is 3: 1 to 0.5: 1,
A water-suspendable seed coating material having a weight ratio of polyvinyl alcohol: ethylene / vinyl acetate copolymer of 3: 1 to 0.5: 1.
酸化チタンの質量平均粒子径が0.1μm以上1μm以下である請求項1記載の種子用被覆材。   The seed coating material according to claim 1, wherein the titanium oxide has a mass average particle diameter of 0.1 µm or more and 1 µm or less. タルクの質量平均粒子径が0.1μm以上20μm以下である請求項1又は2記載の種子用被覆材。   The seed coating material according to claim 1 or 2, wherein the talc has a mass average particle diameter of from 0.1 µm to 20 µm. 請求項1〜3のいずれかに記載の種子用被覆材で表面が被覆されていることを特徴とする種子。   A seed, the surface of which is coated with the seed coating material according to claim 1.
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