Copolyester hot melt adhesive and process for making same

摘要

A copolyester hot melt adhesive and a method of making the same are disclosed. The process comprises mainly the following steps: the raw materials are selected at a predetermined ratio, the raw materials being bisphenol A, maleic acid, terephthalic acid, other dibasic acids, acid, 1,4-nutanediol, other dibasic alcohols, catalysts and stabilizers; Preparing a prepolymer under a negative pressure at a low temperature part; Terminating the esterification process under a normal pressure at a low temperature portion; And finalizing the new copolyester hot melt adhesive by completing a polycondensation step under negative pressure at a high temperature. With the new copolyester hot melt adhesive disclosed above, on the basis of maintaining the overall performance of existing conventional copolyester hot melt adhesives, the dry cleaning resistance is significantly improved and the wash resistance is no less than the polyamide hot melt adhesive However, the total cost is lower than conventional polyamide hot melt adhesives.