| 摘要 |
N,N'-dialkylthioureas, useful as corrosion and mordant inhibitors, vulcanisation promoters and intermediates therefor, photographic adjuvants and isocyanate stabilisers, are prepared from alkyl-ammonium N-alkldithiocarbamates by H2S scission in presence of water, and reaction is terminated by removing at least 5 weight % total water from reaction mixture by distillation. |
