Synthesis and characterization of N-methyl-2-nitrodiphenylamine-4-diazonium salt and its diazoresin

A new substituted diphenylamine diazonium salt, N-methyl-2-nitrodiphenylami ne-4-diazonium salt (MNDDS) and its diazoresin (MNDDS-resin) were synthesiz ed and their thermostability as well as photosensitivity were investigated. The results show that MNDDS and resin exhibit much higher thermostability than that of the parent compound, diphenylamine-4-diazonium salt (DDS) and resin (DDS resin) in solid state or in coating but the photosensitivities o f them are confirmed to be in same level. The excellent thermostability of MNDDS and its diazoresin is very important because the storage life of a ne gative presensitized plate is mainly dependent on it. (C) 1999 John Wiley & Sons, Inc.