THERMOSETTING COMPOSITION FOR SOLDER RESIST AND CURED PRODUCT THEREOF

摘要

There is provided a novel thermosetting composition for a solder resist with excellent flexibility, low warping upon curing, soldering heat resistance, PCT resistance and HHBT resistance, which is suitable as a thermosetting solder resist ink for printed circuit boards and particularly FPC boards. The thermosetting composition for a solder resist according to the invention comprises as essential components: (A) an epoxy resin having two or more epoxy groups in the molecule, (B) a polyacid anhydride represented by general formula (I) as defined in claims, wherein R represents a divalent organic group and n represents an integer of 2-30, and (C) a coupling agent.