Cyanide formation in oxime blocked isocyanates of cation electro‐deposited paints

Makoto Nonomura Department of Chemistry, Tokyo Metropolitan Industrial Technology Center, 13–10, Nishigaoka 3‐Chome, Kita‐ku, Tokyo, 115, Japan

Masahiro Suzuki Department of Industrial Arts, Tokyo Metropolitan Industrial Technology Center, 13–10, Nishigaoka 3‐Chome, Kita‐ku, Tokyo, 115, Japan

Toshiyuki Hobo Department of Industrial Chemistry, Fuculty of Technology, Tokyo Metropolitan University, 1, Minami‐ohsawa 1‐Chome, Hachiouji‐shi, Tokyo, 192–03, Japan

Kouichi Dejima Technical Department, Nippon Oil & Fat Co., Ltd., 15–51, Nitaka 4‐Chome, Yodogawa‐ku, Osaka‐shi, Osaka, 532, Japan

Hisaharu Hotta Research Center, Polymers Laboratory, Mitsubishi Kasei Corp., 1000, Kamoshidacho, Midori‐ku, Yokohama‐shi, Kanagawa, 227, Japan

Abstract

This paper describes the formation of hydrogen cyanide (HCN) in cation electro‐deposited (CED) paints. Larger amounts of HCN were formed from all of the oxime blocked isocyanates. In order to elucidate the formation mechanism of HCN, labeled IPDI‐AO (¹³C and ¹⁵N) were synthesized, and then the presence of labeled cyanogen chloride (CNC1) was examined by GC‐MS.

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Cyanide formation in oxime blocked isocyanates of cation electro‐deposited paints

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Cyanide formation in oxime blocked isocyanates of cation electro‐deposited paints

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