UNSATURATED POLYESTER ADHESIVE RESIN, PHOTOCURABLE ADHESIVE COMPOSITION COMPRISING THE SAME AND ADHESIVE TAPE USING THE SAME

摘要

An unsaturated polyester adhesive resin is provided to realize excellent adhesion to a substrate film, excellent peel force and low tackiness after photocuring, and to obtain an adhesive tape useful for dicing or dicing die bonding. An unsaturated polyester adhesive resin comprises an unsaturated acid, a saturated acid and glycol, and has a vinyl group-containing binder portion. The unsaturated acid is used in an amount of 5-50 mol% based on the combined molar weight of the unsaturated acid and saturated acid. The adhesive resin preferably comprises 2-22 wt% of the unsaturated acid, 32-55 wt% of the saturated acid and 42-57 wt% of glycol. The adhesive resin has a weight average molecular weight of 100,000-400,000.