PURPOSE: To provide the titled compsn. which has heat resistance to soldering and flame retardance and can withstand plating over a long period of time by a method wherein a bisphenol A type or a phenolic novolak type epoxy resin is mixed with a brominated epoxy resin.
CONSTITUTION: (A) A nonbrominated epoxy resin consisting of a bisphenol A type epoxy resin or a phenolic novolak type epoxy resin is mixed with a brominated epoxy resin in such a proportion as to give a bromine content of 10W25wt% per 100pts.wt. of the epoxy resin composed of (A) and (B) components. By replacing a specified amount of the epoxy resin constituting the main component of a resist ink by the brominated epoxy resin, flame redardance can be imparted to the resist ink without damaging chemical resistance which conventional ink has.
MURAKAMI KANJI
MATSUDA YOUICHI
WAJIMA MOTOYO
MORISHITA YASUSADA
