PURPOSE: To obtain a diazo compound useful for e.g. photosensitive lithographic printing matrices high in plate wear, free from print stain, excellent in developability and having wide pH latitude.
CONSTITUTION: This diazo compound is such that an aromatic secondary amino compound having group of formula I (X is a counter anion of diazonium) has been added in a ring-opened fashion to the oxirane ring of a polyfunctional epoxy compound (e.g. bisphenol A digiycidyl ether). This compound is obtained, for example, by the following process: a ring-opening addition reaction is made between (A) a polyfunctional epoxy compound and (B) an aromatic secondary amino compound having substituent (pref. acylamido, nitro) convertible into amino group, and the substituent convertible into amino group on the reaction product is converted into amino group which is, in turn, converted into diazonium salt. Alternatively, this compound can also be obtained by polyaddition reaction between a diisocyanate compound and a diol of formula II (R1 and R2 are each a single bond or alkylene).
MATSUMURA TOMOYUKI
OTA TOMOHISA
MURATA MASAHISA
TSUJI SHIGEO
MITSUBISHI CHEM CORP