NOVEL COPOLYESTER HOT-MELT ADHESIVE AND PREPARATION METHOD THEREFOR

摘要

A novel copolyester hot-melt adhesive and a preparation method thereof are disclosed. The preparation method mainly includes the following steps: selecting raw materials according to preset ratios, wherein the raw materials include: bisphenol A, maleic acid, terephthalic acid, another dibasic acid, 1,4-butanediol, another dibasic alcohol, catalysts and a stabilizer; producing a prepolymer under negative pressure in a low-temperature section, completing an esterification process under normal pressure in the low-temperature section, and completing a polycondensation step under negative pressure in a high-temperature section, thereby finally preparing the novel copolyester hot-melt adhesive product. According to the disclosed copolyester hot-melt adhesive product, on the basis of maintaining the comprehensive performance of the existing conventional copolyester hot-melt adhesive products, the dry cleaning resistance is greatly enhanced, and is no less than the washing resistance of a polyamide hot-melt adhesive, but the overall cost is lower than that of the conventional polyamide hot-melt adhesives.