in the first set of brackets makes up about 70 to 20 percent by weight of the copolymer, and b is a number such that the "soft segment within the second set of brackets makes up about 30 to 80 percent by weight of the copolymer; and blending said copolymer with about 5 to 50 percent by weight of a 1,2-epoxy resin to form a hot melt thermoplastic adhesive blend.