SILOXANEPOLYIMIDE AND HEAT RESISTANT ADHESIVE CONTAINING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a siloxane polyimide soluble in usual organic solvents and excellent in heat resistant adhesiveness when used as a main ingredient in an adhesive for instantaneously adhering a base material of a flexible print board to a copper foil. SOLUTION: This solvent-soluble siloxanepolymide consists of a copolymer from a mixture of a diaminopolysiloxane-alicyclic diamine with an aromatic tetracarboxylic acid dianhydride. A heat resistant adhesive is formed by adding an epoxy resin, a diamine-based curing agent and an organic solvent to the siloxanepolyimide. Adhesiveness is further improved when a fluorine resin is added to the heat resistant adhesive.