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芳香族アミン系エポキシ樹脂硬化剤の塩素処理による反応生成物の検討
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冨士栄聡子1、高橋保雄2、保坂三継3、矢口久美子4
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東京都健康安全研究センター、1環境保健部環境衛生研究科、2退職、3微生物部ウイルス研究科、4精度管理室
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Examination of the reaction products by the chlorination of epoxy resin hardener using the aromatic amine system
Satoko FUJIE1 Yasuo TAKAHASHI2 Mitsugu HOSAKA3 and Kumiko YAGUCHI4
134Tokyo Metropolitan Institute of Public Health 2Retirement
Epoxy resin is used to repair old water distribution pipes. To cure the resin 44'-methylendianiline (MDA) an aromatic amine is used as a hardener. When the drying time during repairs is too short MDA and the reaction products of MDA and chlorine may dissolve into tap water. Therefore we investigated chemicals that were produced by the reaction of MDA or 44'-ethylendianiline (EDA) a hardener similar to MDA and residual chlorine and we also tried to establish a method for the examination of those chemicals in tap water.
We found that both MDA and EDA could produce various chemicals by reaction with residual chlorine at various concentrations. The chemicals identified with a molar ratio of 3 to 1000 to residual chlorine and either MDA or EDA were p-benzoquinone 24-dichloroaniline 246-trichloroaniline. P-aminobenzyl chloride was also identified as a possible reaction chemical produced maximally at the molar ratio of 5. We conclude that detection of these chemicals in tap water is an effective method of confirming the dissolution of MDA and EDA.
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| Keywords: |
メチレンジアニリン(MDA) , エポキシ樹脂硬化剤 , 塩素処理 , 24-ジクロロアニリン , p-アミノベンジルクロライド , |
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[PDF (442.4K)]
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第6巻 , 第1号 , (pp.66-73)
