JP2005008619A - 農薬固形製剤の製造方法 - Google Patents
農薬固形製剤の製造方法 Download PDFInfo
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- JP2005008619A JP2005008619A JP2004113159A JP2004113159A JP2005008619A JP 2005008619 A JP2005008619 A JP 2005008619A JP 2004113159 A JP2004113159 A JP 2004113159A JP 2004113159 A JP2004113159 A JP 2004113159A JP 2005008619 A JP2005008619 A JP 2005008619A
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- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical class [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- DQJCHOQLCLEDLL-UHFFFAOYSA-N tricyclazole Chemical compound CC1=CC=CC2=C1N1C=NN=C1S2 DQJCHOQLCLEDLL-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- JARYYMUOCXVXNK-IMTORBKUSA-N validamycin Chemical compound N([C@H]1C[C@@H]([C@H]([C@H](O)[C@H]1O)O[C@H]1[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O1)O)CO)[C@H]1C=C(CO)[C@H](O)[C@H](O)[C@H]1O JARYYMUOCXVXNK-IMTORBKUSA-N 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
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- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
【解決手段】少なくとも1種類の農薬活性成分と少なくとも1種類の熱可塑性材料を含む農薬組成物の成形品を加熱または保温処理することを特徴とする農薬固形製剤の製造方法。
【効果】本発明により、特有の農薬活性成分の放出速度を有している農薬組成物の成形品を形状を変化させることなく、異なった放出速度を有する農薬固形製剤に変化させることができる。本発明により、種々の放出速度を有する農薬製剤の品揃えが可能になり、作物毎、あるいは地域毎の異なった栽培形態、あるいは栽培方法に密接に適合する農薬製剤を農家に提供することができる。
【選択図】なし
Description
[1] 少なくとも1種類の農薬活性成分と少なくとも1種類の熱可塑性材料を含む農薬組成物の成形品を加熱または保温処理することを特徴とする農薬固形製剤の製造方法。
[2] 農薬組成物の成形品の融点未満の温度で加熱または保温処理することを特徴とする、[1]記載の農薬固形製剤の製造方法。
[3] 加熱処理する際の熱源が遠赤外線および/または温風であることを特徴とする、[1]又は[2]記載の農薬固形製剤の製造方法。
[4] 熱可塑性材料が疎水性の物質であることを特徴とする、[1]〜[3]の何れか一項に記載の農薬固形製剤の製造方法。
[5] [1]〜[4]の何れか一項に記載の方法で製造されることを特徴とする農薬固形製剤。
[6] 少なくとも1種類の農薬活性成分と少なくとも1種類の熱可塑性材料を含む農薬組成物の成形品を加熱または保温処理することを特徴とする、農薬活性成分の放出を抑制する方法。
加熱処理を行う場合、加熱炉または保温庫の加熱温度が成形品の融点以上であれば、成形品が一部、あるいは全部が溶解して、成形品同士の固結を引き起こし、その後の作業性が著しく悪くなる。そのため、本発明の加熱温度の上限は成形品の一部が溶解しない温度、すなわち、成形品の融点未満の温度で行う。加熱処理後の農薬活性成分の放出速度は加熱温度と加熱時間で決められる。加熱温度が高い程、処理時間が長いほど、農薬活性成分の放出速度は抑制される。
農薬活性成分としてジノテフランを3重量%、熱可塑性材料としてカルナウバワックス(東亜化成社製、商品名Refined Granular Carnauba、融点;83℃、軟化点;80℃)18重量%、無機系希釈担体としてホワイトカーボン5重量%、タルク10重量%、炭酸カルシウム重量64%を加熱装置を装着したフローティングミキサーに入れ、70℃まで加熱混合した。この混合物を90℃に加熱した押し出し造粒機を用いて成形したのち、冷却、解砕、整粒してジノテフランの農薬固形製剤(以下、製剤Pと表す。)を得た。
農薬活性成分としてジノテフランを2重量%、熱可塑性材料としてモンタン酸エステルワックス(BASF社製、商品名Luwax−E、融点;85℃、軟化点;71℃)18重量%、無機系希釈担体としてホワイトカーボン5重量%、タルク10重量%、炭酸カルシウム65重量%を加熱装置を装着したフローティングミキサーに入れ、80℃まで加熱混合した。この混合物を加熱装置により80℃に加熱した押し出し造粒機を用いて成形したのち、冷却、解砕、整粒して農薬固形製剤(以下、製剤Qと表わす。)を得た。
農薬活性成分としてジノテフランを3重量%、熱可塑性材料としてモンタン酸エステルワックス(BASF社製、商品名Luwax−E、融点;85℃、軟化点;71℃)14.4重量%、モンタン酸ワックス(BASF社製、商品名Luwax−S、融点;85℃、軟化点;72℃)3.6重量%、無機系希釈担体としてホワイトカーボン5重量%、タルク10重量%、炭酸カルシウム64重量%を加熱装置を装着したフローティングミキサーに入れ、80℃まで加熱混合した。この混合物を加熱装置により80℃に加熱した押し出し造粒機を用いて成形したのち、冷却、解砕、整粒して農薬固形製剤(以下、製剤Rと表わす。)を得た。
参考例1〜3で得られた農薬固形製剤P、Q、Rを出発原料とし、それぞれを遠赤外線アニール炉(ノリタケカンパニーリミテッド社製、遠赤外線設定温度120℃、熱風設定温度70℃)に5分間入れて加熱処理し、農薬固型製剤(以下、製剤A、B、Cと表わす。PがA、QがB、RがCに各々対応する。)を得た。製剤A、B、Cの形状に変化は認められなかった。
参考例2で得られた農薬固形製剤Qを出発原料とし、遠赤外線アニール炉(ノリタケカンパニーリミテッド社製、遠赤外線設定温度100℃、熱風設定温度50℃)に10分間入れて加熱処理し、農薬固型製剤(以下、製剤Dと表わす。)を得た。製剤Dの形状に変化は認められなかった。
参考例2で得られた農薬固形製剤Qを出発原料とし、遠赤外線アニール炉(ノリタケカンパニーリミテッド社製、遠赤外線設定温度120℃、熱風設定温度70℃)に3分間入れて加熱処理し、農薬固型製剤(以下、製剤Eと表わす。)を得た。製剤Eの形状に変化は認められなかった。
農薬固形製剤からのジノテフランの放出試験
参考例1〜3、実施例1〜5で得られたジノテフランを含有する農薬固形製剤中から放出されるジノテフランの放出率を下記の方法で測定した。
放出率=(濾液中の農薬活性成分量/製剤中の農薬活性成分量)×100
Claims (6)
- 少なくとも1種類の農薬活性成分と少なくとも1種類の熱可塑性材料を含む農薬組成物の成形品を加熱または保温処理することを特徴とする農薬固形製剤の製造方法。
- 農薬組成物の成形品の融点未満の温度で加熱または保温処理することを特徴とする、請求項1記載の農薬固形製剤の製造方法。
- 加熱処理する際の熱源が遠赤外線および/または温風であることを特徴とする、請求項1又は2記載の農薬固形製剤の製造方法。
- 熱可塑性材料が疎水性の物質であることを特徴とする、請求項1〜3の何れか一項に記載の農薬固形製剤の製造方法。
- 請求項1〜4の何れか一項に記載の方法で製造されることを特徴とする農薬固形製剤。
- 少なくとも1種類の農薬活性成分と少なくとも1種類の熱可塑性材料を含む農薬組成物の成形品を加熱または保温処理することを特徴とする、農薬活性成分の放出を抑制する方法。
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