知識(shí)貝殼
知識(shí)貝殼
2.2.1 IsocyanatesAs a rule,isocyanates are obtained by the phosgenation of the corresponding primary amines(Fig.2-1).Fig. 2-1 Manufacture of isocyanates by phosgenation of primary aminesAlternatively,phosgene - free manufacturing processes have been devel ......（本文共 32492 字 , 11 張圖） [閱讀本文] >>