ADHESIVE COMPOSITION FOR FLEXIBLE PRINTED WIRING BOARD, ADHESIVE FOR FLEXIBLE PRINTED WIRING BOARD, AND FLEXIBLE PRINTED WIRING BOARD

摘要

As an adhesive composition which exhibits excellent long term durability in moist heat environments and excellent adhesive properties, the present invention provides an adhesive composition for a flexible printed wiring board, which contains a polyester-based resin (A1) containing structural units derived from a polycarboxylic acid and structural units derived from a polyhydric alcohol, and which is characterized in that the polyester-based resin (A1) satisfies the requirements. [1] The ester bond concentration is 7 mmol/g or less. [2] The acid value is 3 mg KOH/g or more. [3] The glass transition temperature (Tg) is -5ºC or higher.