JP6578745B2 - Resin formulation for pest control that lives in water - Google Patents
Resin formulation for pest control that lives in water Download PDFInfo
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- JP6578745B2 JP6578745B2 JP2015109514A JP2015109514A JP6578745B2 JP 6578745 B2 JP6578745 B2 JP 6578745B2 JP 2015109514 A JP2015109514 A JP 2015109514A JP 2015109514 A JP2015109514 A JP 2015109514A JP 6578745 B2 JP6578745 B2 JP 6578745B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C275/00—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C275/04—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of urea groups bound to acyclic carbon atoms
- C07C275/20—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of urea groups bound to acyclic carbon atoms of an unsaturated carbon skeleton
- C07C275/24—Derivatives of urea, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups having nitrogen atoms of urea groups bound to acyclic carbon atoms of an unsaturated carbon skeleton containing six-membered aromatic rings
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Description
本発明は、水中に生息する有害生物防除用樹脂製剤に関する。 The present invention relates to a resin preparation for controlling pests that live in water.
貯水槽など水が滞留した水域における害虫の防除には、種々の有害生物の防除剤が使用されている。かかる有害生物の防除剤として、一般には有害生物防除成分を含有する粒剤、粉剤、水和剤が使用されている。 Various pest control agents are used to control pests in water areas such as water storage tanks. As such pest control agents, granules, powders and wettable powders containing pest control components are generally used.
しかしながら前記した従来の有害生物の防除剤は、有効成分が速く拡散してしまうという問題があり、長期間に渡って効力を発揮する防除剤が求められていた。特に、デング熱、マラリア等の人命に関わる重大な感染症を媒介する有害生物である蚊を長期間に渡って防除することができる防除剤が求められていた。 However, the conventional pest control agents described above have a problem that the active ingredient diffuses quickly, and there has been a demand for a control agent that exhibits its effect over a long period of time. In particular, there has been a demand for a control agent that can control mosquitoes, which are pests that mediate serious life-related infections such as dengue fever and malaria, over a long period of time.
本発明は、貯水槽など水が滞留した水域に生息する有害生物の防除において、長期間有害生物を防除できる樹脂製剤を提供することを課題とする。また本発明は、長期間に渡って水中に生息する有害生物を防除する方法を提供することを課題とする。 An object of the present invention is to provide a resin preparation that can control pests for a long period of time in controlling pests that inhabit water areas such as water storage tanks. Another object of the present invention is to provide a method for controlling pests that live in water for a long period of time.
本発明は、以下のとおりである。
[１]水中に生息する有害生物防除用樹脂製剤であって、該樹脂製剤は、熱可塑性樹脂および2−3質量%の有害生物防除成分を含み、メッシュ部分を有し、有害生物防除成分1mgあたりの該樹脂製剤の表面積が80−150mm2であって、かつ該樹脂製剤の重量1mgあたりの該樹脂製剤の投影面積が0.6−1.0mm2である樹脂製剤。
[２]比重が1.00−1.25である[１]に記載の樹脂製剤。
[３]メッシュ部分が、太さ0.5−2.0mmの部材で構成される[１]に記載の樹脂製剤。
[４]有害生物防除成分が有機リン剤系殺虫剤、尿素系殺虫剤、昆虫成長調節剤及びマクロライド系殺虫剤からなる群から選ばれる１つ以上の成分である[１]に記載の樹脂製剤。
[５]有害生物防除成分がピリプロキシフェンである[１]に記載の樹脂製剤。
[６]熱可塑性樹脂がポリオレフィン系樹脂である[１]に記載の樹脂製剤。
[７][１]に記載の樹脂製剤を水中に沈める工程を有する水中に生息する有害生物の防除方法。
[８]有害生物が蚊の幼虫である[７]に記載の方法。
The present invention is as follows.
[1] A resin preparation for controlling pests inhabiting in water, the resin preparation comprising a thermoplastic resin and 2-3% by mass of a pest control ingredient, having a mesh portion, and 1 mg of a pest control ingredient resin formulation surface area of the resin formulation per is a 80-150mm 2, and the projected area of the resin formulation per weight 1mg of the resin formulation is 0.6-1.0mm 2.
[2] The resin preparation according to [1], having a specific gravity of 1.00 to 1.25.
[3] The resin preparation according to [1], wherein the mesh portion is composed of a member having a thickness of 0.5 to 2.0 mm.
[4] The resin according to [1], wherein the pesticidal component is one or more components selected from the group consisting of organophosphorus insecticides, urea insecticides, insect growth regulators and macrolide insecticides. Formulation.
[5] The resin formulation according to [1], wherein the pesticidal component is pyriproxyfen.
[6] The resin formulation according to [1], wherein the thermoplastic resin is a polyolefin resin.
[7] A method for controlling pests that live in water, comprising a step of sinking the resin preparation according to [1] in water.
[8] The method according to [7], wherein the pest is a mosquito larva.
本発明により、長期間水中に生息する有害生物を防除できる樹脂製剤を提供することができる。また本発明により、長期間に渡って水中に生息する有害生物を防除する方法を提供することができる。 According to the present invention, a resin preparation capable of controlling pests that live in water for a long period of time can be provided. The present invention can also provide a method for controlling pests that live in water for a long period of time.
本発明の水中に生息する有害生物防除用樹脂製剤（以下、本樹脂製剤と称することもある）は、熱可塑性樹脂および有害生物防除成分を含む。 The resin preparation for controlling pests that inhabits the water of the present invention (hereinafter sometimes referred to as the present resin preparation) contains a thermoplastic resin and a pest control component.
本樹脂製剤に用いられる熱可塑性樹脂としては、ポリオレフィン系樹脂が挙げられる。ポリオレフィン系樹脂の例としては、エチレン単独重合体またはエチレン−α−オレフィン共重合体であるポリエチレンや、エチレン−酢酸ビニル共重合体、エチレン−メチルメタクリレート共重合体等の、エチレンとエチレン性不飽和結合を有するカルボン酸誘導体との共重合体が挙げられる。ポリオレフィン系樹脂は、エチレン−酢酸ビニル共重合体及び／又はエチレン−メチルメタクリレート共重合体であることが好ましい。ポリオレフィン系樹脂がエチレン−酢酸ビニル共重合体である場合、該共重合体は酢酸ビニル由来の単量体単位を10−25質量％含む共重合体であることが好ましい。ポリオレフィン系樹脂がエチレン−メチルメタクリレート共重合体である場合、該共重合体はメチルメタクリレート由来の単量体単位を10−25質量％含む共重合体であることが好ましい。
熱可塑性樹脂のメルトフローレイト（Melt Mass-Flow Rate、以下MFRと称することもある）は、5−25g／10minであることが好ましい。MFRは、JIS K 7210の方法に従い測定する。熱可塑性樹脂が、ポリエチレンや、エチレンとエチレン性不飽和結合を有するカルボン酸誘導体との共重合体である場合、MFRは190℃で測定する。
A polyolefin resin is mentioned as a thermoplastic resin used for this resin formulation. Examples of polyolefin resins include ethylene homopolymers or ethylene-α-olefin copolymers such as polyethylene, ethylene-vinyl acetate copolymers, ethylene-methyl methacrylate copolymers, ethylene and ethylenically unsaturated And a copolymer with a carboxylic acid derivative having a bond. The polyolefin resin is preferably an ethylene-vinyl acetate copolymer and / or an ethylene-methyl methacrylate copolymer. When the polyolefin resin is an ethylene-vinyl acetate copolymer, the copolymer is preferably a copolymer containing 10-25% by mass of vinyl acetate-derived monomer units. When the polyolefin resin is an ethylene-methyl methacrylate copolymer, the copolymer is preferably a copolymer containing 10-25% by mass of a monomer unit derived from methyl methacrylate.
The melt flow rate (Melt Mass-Flow Rate, hereinafter sometimes referred to as MFR) of the thermoplastic resin is preferably 5-25 g / 10 min. MFR is measured according to the method of JIS K 7210. When the thermoplastic resin is polyethylene or a copolymer of ethylene and a carboxylic acid derivative having an ethylenically unsaturated bond, MFR is measured at 190 ° C.
本樹脂製剤は、有害生物防除成分を2−3質量％含む。本樹脂製剤は、熱可塑性樹脂を通常50−90質量％含む。本樹脂製剤が有害生物防除成分以外の成分も含む場合は、５0質量％以上含むことが好ましい。 This resin preparation contains 2-3 mass% of pest control components. The resin preparation usually contains 50-90% by mass of a thermoplastic resin. When this resin formulation also contains components other than a pest control component, it is preferable to contain 50 mass% or more.
有害生物防除成分（以下、防除成分と称することもある）は、クロルピリホス、フェンチオン、ピリミホスメチル、テメホス等の有機リン剤系殺虫剤、ジフルベンズロン、ノバルロン等のベンゾイル尿素系殺虫剤、ピリプロキシフェン、メトプレン等の昆虫成長調節剤、またはスピノサド等のマクロライド系殺虫剤から選ばれる。2種類以上の防除成分を用いてもよい。本発明で使用する好ましい防除成分は、ジフルベンズロン、ノバルロン等のベンゾイル尿素系殺虫剤、ピリプロキシフェン、メトプレン等の昆虫成長調節剤であり、より好ましくはピリプロキシフェン等の昆虫成長調節剤である。
例えばデング熱、マラリアなどを媒介する蚊の幼虫を防除するために、本樹脂製剤は飲料用途に供せられる水域に処理される。極少量で蚊の幼虫の成長を制御でき、かつ人間や家畜などの脊椎動物に対する高い安全性を有することから、防除成分がピリプロキシフェンであることがさらに好ましい。
Pest control components (hereinafter also referred to as control components) include organophosphorus insecticides such as chlorpyrifos, fenthion, pyrimifosmethyl, and temefos, benzoylurea insecticides such as diflubenzuron and novallon, pyriproxyfen, and metoprene Insect growth regulators or macrolide insecticides such as spinosad. Two or more types of control components may be used. Preferred control components used in the present invention are benzoylurea insecticides such as diflubenzuron and nobarulon, insect growth regulators such as pyriproxyfen and metoprene, and more preferably insect growth regulators such as pyriproxyfen.
For example, in order to control mosquito larvae that transmit dengue fever, malaria, and the like, the resin preparation is treated in water for use in beverages. Since the growth of mosquito larvae can be controlled with a very small amount and it has high safety against vertebrates such as humans and domestic animals, it is more preferable that the controlling component is pyriproxyfen.
本樹脂製剤は、リン系、フェノール系等の酸化防止剤を含んでいてもよい。酸化防止剤の含有量は、5質量％以下が好ましい。 This resin formulation may contain antioxidants, such as phosphorus type and phenol type. The content of the antioxidant is preferably 5% by mass or less.
本樹脂製剤は水中に沈めて使用するので、防除成分が光によって分解されにくい。また本樹脂製剤は水瓶や貯水槽等の底に沈んでいるので、誤廃棄を防止できる。本樹脂製剤を水に沈めるために、本樹脂製剤は密度調節剤を含むことが好ましい。密度調節剤としては、比重が1.1以上である無機化合物が好ましく用いられ、比重が1.1以上である金属酸化物もしくは金属塩がより好ましく用いられる。本明細書における比重とは、２５℃の水を標準物質としたときの値である。すなわち、２５℃の水の密度に対する各物質の密度の比である。 Since this resin formulation is used by being submerged in water, the control component is not easily decomposed by light. Moreover, since this resin formulation is sinking in the bottom of a water bottle, a water tank, etc., it can prevent mis-disposing. In order to submerge the resin preparation in water, the resin preparation preferably contains a density regulator. As the density adjusting agent, an inorganic compound having a specific gravity of 1.1 or more is preferably used, and a metal oxide or metal salt having a specific gravity of 1.1 or more is more preferably used. The specific gravity in this specification is a value when water at 25 ° C. is used as a standard substance. That is, the ratio of the density of each substance to the density of water at 25 ° C.
本樹脂製剤に用いられる金属酸化物もしくは金属塩としては、酸化アルミナ(比重3.9-4.1)、酸化チタン(比重3.6-4.3)、酸化鉄(比重5.2)、酸化亜鉛(比重5.6)、酸化カルシウム(比重3.3)、酸化ケイ素(比重2.2)、炭酸カルシウム(比重2.7-2.9)、が挙げられる。本樹脂製剤は、2種類以上の密度調整剤を含んでもよい。
本樹脂製剤は、密度調整剤を10−50質量％含むことが好ましく、20−40質量％含むことがより好ましい。
Examples of the metal oxide or metal salt used in the resin formulation include alumina oxide (specific gravity 3.9-4.1), titanium oxide (specific gravity 3.6-4.3), iron oxide (specific gravity 5.2), zinc oxide (specific gravity 5.6), calcium oxide ( Specific gravity 3.3), silicon oxide (specific gravity 2.2), calcium carbonate (specific gravity 2.7-2.9). The present resin preparation may contain two or more kinds of density adjusting agents.
The resin preparation preferably contains 10-50% by mass of a density adjusting agent, more preferably 20-40% by mass.
本樹脂製剤は、水に沈めて使用するため、比重が1.00−1.25であることが好ましく、1.05−1.25であることがより好ましい。 Since the resin preparation is used by being submerged in water, the specific gravity is preferably 1.00 to 1.25, more preferably 1.05 to 1.25.
本樹脂製剤は、防除成分を拡散しやすくするため、メッシュ部分を有する。メッシュ部分を構成する部材の太さは、0.5−2.0ｍｍであることが好ましく、0.5−1.5ｍｍであることがより好ましい。部材の太さとは、メッシュ部分を構成する部材の最も太い部分の太さである。メッシュ部分は、ほぼ均一な太さの部材で形成されていることが好ましい。 The resin preparation has a mesh portion to facilitate the diffusion of the control component. The thickness of the member constituting the mesh portion is preferably 0.5 to 2.0 mm, and more preferably 0.5 to 1.5 mm. The thickness of a member is the thickness of the thickest part of the member which comprises a mesh part. The mesh portion is preferably formed of a member having a substantially uniform thickness.
本樹脂製剤は、有害生物防除成分1mgあたりの該樹脂製剤の表面積が80−150mm2であり、好ましくは100−140mm2である。有害生物防除成分1mgあたりの樹脂製剤の表面積が80mm2より小さいと有害生物防除成分が拡散しにくくなり樹脂製剤の使用開始直後に十分な効力を示せないことがあり、有害生物防除成分1mgあたりの樹脂製剤の表面積が150mm2より大きいと有害生物防除成分の拡散が速すぎて、樹脂製剤の寿命が短くなることがある。 This resin formulation is pest control ingredient surface area of the resin formulation per 1mg is 80-150Mm 2, preferably 100-140mm 2. There is the surface area of the resin formulation per pest control ingredient 1mg does Shimese sufficient efficacy immediately after the start of use of it resin formulations difficult to diffuse 80 mm 2 smaller than pest control ingredient, per pest control ingredient 1mg When the surface area of the resin preparation is larger than 150 mm 2 , the life of the resin preparation may be shortened because the diffusion of the pest control component is too fast.
本樹脂製剤の重量1mgあたりの本樹脂製剤の投影面積は、0.6−1.0mm2であり、好ましくは0.7−0.9mm2である。重量1mgあたりの投影面積が1.0mm2より大きいと、気泡が樹脂製剤に付着して樹脂製剤が水面に浮いてしまうことがあり、重量1mgあたりの投影面積が0.6mm2を下回ると防除成分の拡散が遅くなり、樹脂製剤の使用開始直後に十分な効力を示せないことがある。 Projected area of the resin formulation per weight 1mg of the resin formulation is 0.6-1.0Mm 2, preferably 0.7-0.9mm 2. If the projected area per 1 mg of weight is larger than 1.0 mm 2 , bubbles may adhere to the resin formulation and the resin formulation may float on the water surface.If the projected area per 1 mg of weight is less than 0.6 mm 2 , Diffusion slows down and may not show sufficient efficacy immediately after the start of use of the resin preparation.
本樹脂製剤は、通常射出成形で製造される。 The resin preparation is usually produced by injection molding.
本樹脂製剤によって防除できる有害生物としては、ハエ目蚊科に属するアカイエカ、ネッタイイエカ、チカイエカ、コガタアカイエカ、トラフカクイカ、ハマダラカ、ヒトスジシマカ、ネッタイシマカ、トウゴウヤブカ、キンイロヤブカ、セスジヤブカ、オオクロヤブカ、アシマダラヌマカ、キンパラナガハシカ、シマハマダラカ、コガタハマダラカ等の幼虫；チョウバエ科に属するホシチョウバエ、オオショウバエ等の幼虫；ユスリカ科に属するセスジユスリカ、オオユスリカ、アカムシユスリカ、シマユスリカ、オオヤマチビユスリカ等の幼虫；カゲロウ目シロカゲロウ科に属するオオシロカゲロウの幼虫；トビケラ目シマトビケラ科に属するコガタシマトビケラ、オオシマトビケラ、ナカハラシマトビケラ等の幼虫を挙げることができる。本樹脂製剤によって防除できる有害生物は、本樹脂製剤に含まれる防除成分の種類に応じて変化する。
本樹脂製剤に含まれる防除成分がピリプロキシフェンである場合、本樹脂製剤は蚊の幼虫を防除するために有効である。
The pests that can be controlled by this resin preparation include the mosquitoes belonging to the family Fliesidae mosquitoes, Attaikaeka, Chikaieka, Kogataaikaeka, Torafuka-kuika, Anopheles acacia, Aedes aegypti, Togoyabuka, Kiniroyabuka, Sesyayabuka Larva such as stag beetle; Larva such as Drosophila, Drosophila, etc .; Larva such as Cedron chironomid, Oyusurika, Akamushi chironka, Sima chironomid, Oyamamachibiyusurika; Examples include larvae belonging to the order of the genus Shimatobikela, Oshimatovicera, Nakaharashimatovicera, etc. . The pests that can be controlled by the resin formulation vary depending on the type of the control component contained in the resin formulation.
When the control ingredient contained in the resin preparation is pyriproxyfen, the resin preparation is effective for controlling mosquito larvae.
以下、本発明を実施例にてより具体的に説明するが、本発明はこれらの実施例に限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these Examples.
＜比重の測定＞
各樹脂製剤の比重は、以下の方法で求めた。以下の操作は２５℃で行った。
100ml容メスシリンダーにイオン交換水80mlを加えた。各実施例で得た樹脂製剤を裁断し、裁断した樹脂製剤をイオン交換水に投入した。水面が９０mlの目盛りに到達するまで裁断した樹脂製剤をイオン交換水に投入することによって、１０ｃｍ３の樹脂製剤を正確に測定した。１０ｃｍ３の樹脂製剤を水から取り出して乾燥した。乾燥した樹脂製剤の質量を測定し、該質量と体積（１０ｃｍ３）とから、樹脂製剤の密度を算出した。
100ml容メスシリンダーにイオン交換水100mlを加えた。100mlのイオン交換水の重量を測定し、イオン交換水の密度を求めた。
イオン交換水の密度に対する樹脂製剤の密度を算出し、樹脂製剤の比重を求めた。
<Measurement of specific gravity>
The specific gravity of each resin preparation was determined by the following method. The following operations were performed at 25 ° C.
80 ml of ion exchange water was added to a 100 ml graduated cylinder. The resin preparation obtained in each Example was cut, and the cut resin preparation was put into ion-exchanged water. A resin preparation of 10 cm 3 was accurately measured by putting the resin preparation cut until the water surface reached a scale of 90 ml into ion-exchanged water. A 10 cm 3 resin formulation was removed from the water and dried. The mass of the dried resin preparation was measured, and the density of the resin preparation was calculated from the mass and volume (10 cm 3 ).
100 ml of ion exchange water was added to a 100 ml graduated cylinder. The weight of 100 ml of ion exchange water was measured, and the density of the ion exchange water was determined.
The density of the resin formulation relative to the density of ion-exchanged water was calculated, and the specific gravity of the resin formulation was determined.
＜実施例1＞
密度940kg/m3、MFR 7 g/10min (190℃,2.16kg)であるエチレン−メチルメタクリレート共重合体(メチルメタクリレート由来の単量体単位含量18質量％) 67.5 質量%、ピリプロキシフェン2質量%、酸化チタン30質量%および青色顔料0.5質量%から成る樹脂コンパウンドを、シリンダ温度を180℃に設定したスクリュー径29mmの二軸押出機にて、スクリュー回転数300rpmにて押出し成形した。押出機の先端に備えられたダイから押出されたストランドをペレタイザーで切断し、樹脂ペレットを作製した。得られた樹脂ペレットを射出成型機にて加工し、太さ0.8mmの部材のメッシュで形成されたプレート状の樹脂製剤を得た。得られた樹脂製剤の物性を表１に示す。
<Example 1>
Density 940kg / m 3 , MFR 7 g / 10min (190 ° C, 2.16 kg) ethylene-methyl methacrylate copolymer (methyl methacrylate-derived monomer unit content 18% by mass) 67.5% by mass, pyriproxyfen 2 mass %, 30% by mass of titanium oxide and 0.5% by mass of blue pigment were extruded using a twin screw extruder with a screw diameter of 29 mm and a cylinder temperature set at 180 ° C. at a screw speed of 300 rpm. Strands extruded from a die provided at the tip of the extruder were cut with a pelletizer to produce resin pellets. The obtained resin pellets were processed by an injection molding machine to obtain a plate-shaped resin preparation formed of a mesh of a member having a thickness of 0.8 mm. Table 1 shows the physical properties of the obtained resin preparation.
＜実施例2＞
密度940kg/m3、MFR 7 g/10min (190℃,2.16kg)であるエチレン−メチルメタクリレート共重合体(メチルメタクリレート由来の単量体単位含量18質量％) 67.5質量%、ピリプロキシフェン2質量%、酸化チタン30質量%および青色顔料0.5質量%から成る樹脂コンパウンドを、シリンダ温度を180℃に設定したスクリュー径29mmの二軸押出機にて、スクリュー回転数300rpmにて押出し成形した。押出機の先端に備えられたダイから押出されたストランドをペレタイザーで切断し、樹脂ペレットを作製した。得られた樹脂ペレットを射出成型機にて加工し、樹脂製剤を得た。該樹脂製剤の形状は、太さ0.8mmの部材のメッシュで形成された２枚のプレートを、互いに直交するように組み合わせた形状であった。得られた樹脂製剤の物性を表１に示す。
<Example 2>
Density 940kg / m 3 , MFR 7 g / 10min (190 ° C, 2.16 kg) ethylene-methyl methacrylate copolymer (methyl methacrylate-derived monomer unit content 18% by mass) 67.5% by mass, pyriproxyfen 2 mass %, 30% by mass of titanium oxide and 0.5% by mass of blue pigment were extruded using a twin screw extruder with a screw diameter of 29 mm and a cylinder temperature set at 180 ° C. at a screw speed of 300 rpm. Strands extruded from a die provided at the tip of the extruder were cut with a pelletizer to produce resin pellets. The obtained resin pellets were processed with an injection molding machine to obtain a resin preparation. The shape of the resin preparation was a shape in which two plates formed of a mesh of a member having a thickness of 0.8 mm were combined so as to be orthogonal to each other. Table 1 shows the physical properties of the obtained resin preparation.
＜実施例3＞
密度940kg/m3、MFR 7 g/10min (190℃,2.16kg)であるエチレン−メチルメタクリレート共重合体(メチルメタクリレート由来の単量体単位含量18質量％) 67.5 質量%、ピリプロキシフェン2質量%、酸化チタン30質量%および青色顔料0.5質量%から成る樹脂コンパウンドを、シリンダ温度を180℃に設定したスクリュー径29mmの二軸押出機にて、スクリュー回転数300rpmにて押出し成形した。押出機の先端に備えられたダイから押出されたストランドをペレタイザーで切断し、樹脂ペレットを作製した。得られた樹脂ペレットを射出成型機にて加工し、太さ0.8mmの部材のメッシュで形成されたざる形の樹脂製剤を得た。得られた樹脂製剤の物性を表１に示す。
<Example 3>
Density 940kg / m 3 , MFR 7 g / 10min (190 ° C, 2.16 kg) ethylene-methyl methacrylate copolymer (methyl methacrylate-derived monomer unit content 18% by mass) 67.5% by mass, pyriproxyfen 2 mass %, 30% by mass of titanium oxide and 0.5% by mass of blue pigment were extruded using a twin screw extruder with a screw diameter of 29 mm and a cylinder temperature set at 180 ° C. at a screw speed of 300 rpm. Strands extruded from a die provided at the tip of the extruder were cut with a pelletizer to produce resin pellets. The obtained resin pellets were processed by an injection molding machine to obtain an unshaped resin formulation formed of a mesh of a member having a thickness of 0.8 mm. Table 1 shows the physical properties of the obtained resin preparation.
＜実施例4＞
密度940kg/m3、MFR 7 g/10min (190℃,2.16kg)であるエチレン−メチルメタクリレート共重合体(メチルメタクリレート由来の単量体単位含量18質量％) 67.5 質量%、ピリプロキシフェン2質量%、酸化チタン30質量%および緑色顔料0.5質量%から成る樹脂コンパウンドを、シリンダ温度を180℃に設定したスクリュー径29mmの二軸押出機にて、スクリュー回転数300rpmにて押出し成形した。押出機の先端に備えられたダイから押出されたストランドをペレタイザーで切断し、樹脂ペレットを作製した。得られた樹脂ペレットを射出成型機にて加工し、太さ1.0mmのメッシュで形成されたざる形の樹脂製剤を得た。得られた樹脂製剤の物性を表１に示す。
<Example 4>
Density 940kg / m 3 , MFR 7 g / 10min (190 ° C, 2.16 kg) ethylene-methyl methacrylate copolymer (methyl methacrylate-derived monomer unit content 18% by mass) 67.5% by mass, pyriproxyfen 2 mass %, 30% by mass of titanium oxide and 0.5% by mass of green pigment were extruded using a twin screw extruder with a screw diameter of 29 mm and a cylinder temperature set at 180 ° C. at a screw speed of 300 rpm. Strands extruded from a die provided at the tip of the extruder were cut with a pelletizer to produce resin pellets. The obtained resin pellets were processed with an injection molding machine to obtain an unshaped resin formulation formed with a 1.0 mm thick mesh. Table 1 shows the physical properties of the obtained resin preparation.
＜実施例5＞
密度940kg/m3、MFR 7 g/10min (190℃,2.16kg)であるエチレン−メチルメタクリレート共重合体(メチルメタクリレート由来の単量体単位含量18質量％) 66.5質量%、ピリプロキシフェン3質量%、酸化チタン30質量%および緑色顔料0.5質量%から成る樹脂コンパウンドを、シリンダ温度を180℃に設定したスクリュー径29mmの二軸押出機にて、スクリュー回転数300rpmにて押出し成形した。押出機の先端に備えられたダイから押出されたストランドをペレタイザーで切断し、樹脂ペレットを作製した。得られた樹脂ペレットを射出成型機にて加工し、太さ0.8mmの部材のメッシュで形成されたざる形の樹脂製剤を得た。得られた樹脂製剤の物性を表１に示す。
<Example 5>
Density 940kg / m 3 , MFR 7 g / 10min (190 ° C, 2.16 kg) ethylene-methyl methacrylate copolymer (methyl methacrylate-derived monomer unit content 18% by mass) 66.5% by mass, pyriproxyfen 3 mass %, 30% by mass of titanium oxide and 0.5% by mass of green pigment were extruded using a twin screw extruder with a screw diameter of 29 mm and a cylinder temperature set at 180 ° C. at a screw speed of 300 rpm. Strands extruded from a die provided at the tip of the extruder were cut with a pelletizer to produce resin pellets. The obtained resin pellets were processed by an injection molding machine to obtain an unshaped resin formulation formed of a mesh of a member having a thickness of 0.8 mm. Table 1 shows the physical properties of the obtained resin preparation.
＜比較例1＞
密度940kg/m3、MFR 15g/10min (190℃,2.16kg)であるエチレン−酢酸ビニル共重合体(酢酸ビニル由来の単量体単位含量10質量％)71.4 質量%、ピリプロキシフェン5質量%、炭酸カルシウム23質量%および緑色顔料0.6質量%から成る樹脂コンパウンドを、ラボプラストミルを用いて混練した。得られた混練物を、プレス成形機でシートに成形した後、押出混練可能な形状に裁断した。裁断したシートを押出混練機にてシリンダ温度160℃で押出成形した。ダイから押し出されたストランドをペレタイザーで切断し、円筒形状の樹脂製剤を得た。得られた樹脂製剤の物性を表１に示す。
<Comparative Example 1>
Density 940kg / m 3 , MFR 15g / 10min (190 ° C, 2.16kg) ethylene-vinyl acetate copolymer (vinyl acetate-derived monomer unit content 10% by mass) 71.4% by mass, pyriproxyfen 5% by mass A resin compound consisting of 23% by mass of calcium carbonate and 0.6% by mass of green pigment was kneaded using a lab plast mill. The obtained kneaded product was formed into a sheet with a press molding machine, and then cut into a shape capable of extrusion kneading. The cut sheet was extruded at a cylinder temperature of 160 ° C. using an extrusion kneader. The strand extruded from the die was cut with a pelletizer to obtain a cylindrical resin preparation. Table 1 shows the physical properties of the obtained resin preparation.
＜比較例2＞
密度940kg/m3、MFR 15g/10min (190℃,2.16kg)であるエチレン−メチルメタクリレート共重合体(メチルメタクリレート由来の単量体単位含量15質量％) 70.4 質量%、ピリプロキシフェン2質量%、酸化チタン27質量%および緑色顔料0.6質量%から成る樹脂コンパウンドを、シリンダ温度を180℃に設定したスクリュー径29mmの二軸押出機にて押出し成形した。押出機の先端に備えられたダイから押出されたストランドをペレタイザーで切断し、樹脂ペレットを作製した。得られた樹脂ペレットをプレス機にて、温度150℃にてプレス加工し板状とした後、カッターで板状成形品を所定の大きさに切断し、樹脂製剤を得た。得られた樹脂製剤の物性を表１に示す。
<Comparative Example 2>
Density 940kg / m 3 , MFR 15g / 10min (190 ° C, 2.16kg) ethylene-methyl methacrylate copolymer (methyl methacrylate-derived monomer unit content 15% by mass) 70.4% by mass, pyriproxyfen 2% by mass A resin compound consisting of 27% by mass of titanium oxide and 0.6% by mass of green pigment was extruded using a twin screw extruder with a screw diameter of 29 mm and a cylinder temperature set at 180 ° C. Strands extruded from a die provided at the tip of the extruder were cut with a pelletizer to produce resin pellets. The obtained resin pellets were pressed with a press at a temperature of 150 ° C. to form a plate, and then the plate-shaped molded product was cut into a predetermined size with a cutter to obtain a resin preparation. Table 1 shows the physical properties of the obtained resin preparation.
＜比較例3＞
密度940kg/m3、MFR 7 g/10min (190℃,2.16kg)であるエチレン−メチルメタクリレート共重合体(メチルメタクリレート由来の単量体単位含量18質量％) 67.5 質量%、ピリプロキシフェン2質量%、酸化チタン30質量%および白色顔料0.5質量%から成る樹脂コンパウンドを、シリンダ温度を180℃に設定したスクリュー径29mmの二軸押出機にて、スクリュー回転数300rpmにて押出し成形した。押出機の先端に備えられたダイから押出されたストランドをペレタイザーで切断し、樹脂ペレットを作製した。得られた樹脂ペレットを180℃に設定したスクリュー径29mmの二軸押出成形機にて押出成形した。押出機の先端に備えられたネット成型用異形ダイスを介して溶融樹脂を押出し、延伸することにより、ひし形の網目を有するネットを得た。ネットをはさみで切断し、樹脂製剤を得た。ネットを構成する糸の太さは1.5mmであった。得られた樹脂製剤の物性を表１に示す。
<Comparative Example 3>
Density 940kg / m 3 , MFR 7 g / 10min (190 ° C, 2.16 kg) ethylene-methyl methacrylate copolymer (methyl methacrylate-derived monomer unit content 18% by mass) 67.5% by mass, pyriproxyfen 2 mass %, 30% by mass of titanium oxide and 0.5% by mass of white pigment were extruded using a twin screw extruder with a screw diameter of 29 mm and a cylinder temperature of 180 ° C. at a screw speed of 300 rpm. Strands extruded from a die provided at the tip of the extruder were cut with a pelletizer to produce resin pellets. The obtained resin pellets were extruded using a twin screw extruder with a screw diameter of 29 mm set at 180 ° C. The molten resin was extruded through a deformed die for forming a net provided at the tip of the extruder and stretched to obtain a net having a rhombus network. The net was cut with scissors to obtain a resin preparation. The thickness of the thread constituting the net was 1.5 mm. Table 1 shows the physical properties of the obtained resin preparation.
＜効力試験＞
次に先の実施例、比較例にて得られた各樹脂製剤の効力評価試験結果について説明する。
容量60Lの素焼き水瓶に40Lの1昼夜汲み置きした水道水を注いた。各水瓶に、実施例1−5で得た各樹脂製剤を１つずつ投入した。樹脂製剤は水に沈んだ。有害生物防除成分量を実施例1及び2と同じ量にするため、比較例1で得た樹脂製剤は8個、比較例2で得た樹脂製剤は4個を、各水瓶に投入した。樹脂製剤は水に沈んだ。比較例3の樹脂製剤は、投入する樹脂製剤の表面積が実施例1と同じになるように投入量を調整して投入した。
その後、1週間毎に半分の水を入れ替えながらネッタイシマカの羽化阻害活性を確認した。羽化阻害活性は、次の方法で求めた。樹脂製剤を投入した水瓶中の水100mlを200mlのアルミカップに入れた。該カップに、ネッタイシマカ3〜4令の幼虫を20頭ずつ放虫し、8日後の羽化数を求めた。2回行った試験の平均の羽化数を用いて、次式より羽化阻害活性を算出した。
羽化阻害活性 （％） = ( 1 -羽化数 / 供試虫数 )×100
樹脂製剤を投入してから1週間後、５週間後、１０週間後、１５週間後、２０週間後のそれぞれにおいて、上記試験を行った。各試験におけるネッタイシマカの羽化阻害活性（%）を、表2に示す。
実施例で得られた樹脂製剤はいずれも樹脂製剤を水に投入した直後から20週間に渡り安定した効力を示した。比較例1、2で得られた樹脂製剤は初期効力に劣った。比較例3で得られた樹脂製剤は水面に浮上してしまい、試験後期は効力不足となった。製剤が直射日光に晒されたため、防除成分が分解してしまったと考えられる。
<Efficacy test>
Next, the effect evaluation test result of each resin formulation obtained in the previous examples and comparative examples will be described.
40L tap water was poured into a 60L unglazed water bottle. Each resin formulation obtained in Example 1-5 was added to each water bottle one by one. The resin formulation sank in water. In order to make the amount of the pest control component the same as in Examples 1 and 2, 8 resin preparations obtained in Comparative Example 1 and 4 resin preparations obtained in Comparative Example 2 were put into each water bottle. The resin formulation sank in water. The resin preparation of Comparative Example 3 was added after adjusting the input amount so that the surface area of the resin preparation to be added was the same as in Example 1.
After that, we confirmed the emergence inhibitory activity of Aedes aegypti, replacing half of the water every week. The emergence inhibitory activity was determined by the following method. 100 ml of water in a water bottle charged with a resin preparation was placed in a 200 ml aluminum cup. 20 larvae of Aedes aegypti 3-4 years old were released into the cup at a time, and the number of emergence after 8 days was determined. The emergence inhibition activity was calculated from the following formula using the average number of emergence of the test conducted twice.
Emergence inhibition activity (%) = (1-emergence number / number of test insects) x 100
The above test was performed at 1 week, 5 weeks, 10 weeks, 15 weeks, and 20 weeks after the resin formulation was introduced. Table 2 shows the emergence inhibitory activity (%) of Aedes aegypti in each test.
The resin formulations obtained in the examples all showed stable efficacy for 20 weeks immediately after the resin formulation was added to water. The resin preparations obtained in Comparative Examples 1 and 2 were inferior in initial efficacy. The resin preparation obtained in Comparative Example 3 floated on the water surface and became ineffective in the latter half of the test. It is probable that the control component was decomposed because the formulation was exposed to direct sunlight.
本発明の樹脂製剤は、有害生物防除、特に比較的水が滞留した水域に生息する有害生物の防除に有用である。 The resin preparation of the present invention is useful for pest control, particularly for pest control inhabiting water areas where water is relatively retained.
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| BR102016011775-5A BR102016011775B1 (en) | 2015-05-29 | 2016-05-24 | resin formulation and method to control pests that inhabit underwater regions |
| ARP160101510A AR104742A1 (en) | 2015-05-29 | 2016-05-26 | FORMULATION OF RESIN FOR THE CONTROL OF PESTS THAT LIVE UNDER THE WATER |
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