JP5328282B2 - 空気清浄機設置用薬剤担持体 - Google Patents
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- Agricultural Chemicals And Associated Chemicals (AREA)
Description
(1)ポリエチレン系樹脂にメタクリル酸メチル単量体単位を4〜20質量%含有させた樹脂担体に、常温揮散性薬剤組成物としてメトフルトリン、プロフルトリン、トランスフルトリン、エムペントリン、及びテラレスリンから選ばれた1種又は2種以上を0.5〜15質量%混錬させ、網状もしくはネット状に形成されたものであって、前記網やネットを構成するフィラメントの直径は、0.4mm〜2.0mmで、また、その開孔率は、該開孔部の合計で40〜85%であり、しかも空気清浄機の風量が数段階切替え可能で0.5m3 /分〜5m3 /分の範囲にわたっている空気清浄機設置用薬剤担持体。
また、パラアミノ安息香酸類、桂皮酸類、サリチル酸類、ベンゾフェノン類及びベンゾトリアゾール類などの紫外線吸収剤を用いることにより、保管時、あるいは使用時の耐光性を一段と向上させることができ、更に、着色剤、帯電防止剤などを適宜配合してもよい。色彩を付加したり、タイムインジケーターを装着して使用終了時点を視認できるようにすれば、商品価値を高めることができるので好ましい形態である。
かかる樹脂担体としては、例えば、ポリエチレン系樹脂やポリプロピレン系樹脂のようなポリオレフィン系樹脂に、カルボン酸エステル等の単量体単位を含有させたものがあげられる。ここでカルボン酸エステル等の単量体は常温揮散性薬剤のブリードをコントロールするのに効果的で、アクリル酸メチル、アクリル酸エチル、メタクリル酸メチル、メタクリル酸エチル、酢酸ビニル等を例示できる。
ポリオレフィン系樹脂に対するこれらのカルボン酸エステル単量体含有比率は、一般に、カルボン酸エステル単量体含有比率が高くなるほど常温揮散性薬剤のブリード速度を遅らせる傾向があるが、使用する常温揮散性薬剤の種類や薬剤量、あるいは使用目的等に応じて、4〜20質量%の範囲で適宜調整すればよい。なお、前記樹脂担体は、あらかじめカルボン酸エステル単量体を多く含有するポリオレフィン系共重合体とオレフィンの単独重合体を混合してその含有比率を調整したポリマーブレンドを用いることもできるし、更には必要に応じて、スチレン系熱エラストマー等の他の高分子化合物を含有させてもよい。
この空気清浄機をリビングルームに置いて約60日間使用したところ、メトフルトリン揮散量は、風量をどのレベルに切り替えても、初期の約0.3mg/hから終期の約0.1mg/hまで漸減傾向にて安定していた。従って、メトフルトリンが過大に室内に放散されることがなく人やペットに安心して使用できた。また、使用期間中、蚊や他の害虫に対して優れた防除効果を示すとともに、該害虫がベランダの出入り口から室内へ侵入するのも防止でき、空気清浄機に付与される簡便な害虫防除手段として極めて実用的であった。
これに対し、比較例1のように、樹脂担体として、ポリオレフィン系樹脂にカルボン酸エステル単量体単位を4質量%以下の範囲で含有させたものを用いた場合は、初期の揮散量が過大で、その後急激に減少し、効力の持続性に乏しかった。また、空気清浄機の風量に依存して揮散量が上下し、空気清浄機設置用の薬剤担持体として適当とは言えなかった。更に、樹脂ネットにメトフルトリンを塗布させた薬剤担持体(比較例2)については、揮散量の経時的推移、風量依存性とも、比較例1よりも一層不適であることが認められた。従って、本発明の空気清浄機設置用薬剤担持体の有用性は明らかである。
Claims (1)
- ポリエチレン系樹脂にメタクリル酸メチル単量体単位を4〜20質量%含有させた樹脂担体に、常温揮散性薬剤組成物としてメトフルトリン、プロフルトリン、トランスフルトリン、エムペントリン、及びテラレスリンから選ばれた1種又は2種以上を0.5〜15質量%混錬させ、網状もしくはネット状に形成されたものであって、前記網やネットを構成するフィラメントの直径は、0.4mm〜2.0mmで、また、その開孔率は、該開孔部の合計で40〜85%であり、しかも空気清浄機の風量が数段階切替え可能で0.5m3 /分〜5m3 /分の範囲にわたっていることを特徴とする空気清浄機設置用薬剤担持体。
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JP2008260228A JP5328282B2 (ja) | 2008-10-07 | 2008-10-07 | 空気清浄機設置用薬剤担持体 |
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Publications (2)
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JP2010090047A JP2010090047A (ja) | 2010-04-22 |
JP5328282B2 true JP5328282B2 (ja) | 2013-10-30 |
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