THERMAL ADHESIVE CO-POLYESTER WHICH PREVENTS LOSS DUE TO SCATTERING OF COPOLYMERIZATION MATERIALS AND SOLVES PROBLEM OF INFERIOR COLOR, PREPARATION METHOD AND BINDER FIBER CONTAINING THE POLYESTER

摘要

PURPOSE: A thermal adhesive co-polyester polyester, its preparation method and a binder fiber containing the polyester are provided, to improve adhesive strength and the touch of adhered region. CONSTITUTION: The method comprises the step of copolymerizing a dicarbonic acid component which comprises 50-95 mol% of terephthalic acid and/or its ester derivative, and 5-50 mol% of a phthalic anhydride ester derivative represented by the formula 1; a diol component which comprises 70-100 mol% of ethylene glycol and 0-30 mol% of a diol having a boiling point below 300 deg.C; and a multifunctional component, by esterification and polycondensation, wherein R' and R'' are identical or different each other and are an ethylene glycol or a diol having a boiling point below 300 deg.C. Some of the ethylene glycol and the diol having a boiling point below 300 deg.C are added during the esterification of copolymeric polyester of the phthalic anhydride ester derivative formed through the esterification with phthalic anhydride.