| 摘要 |
PURPOSE: A polyester resin composition is provided to obtain the composition having high molecular weight sufficient to practically use it and good fusion viscosity and tear-resistance required to various molding processes such as injection molding, hollow molding or film forming process. CONSTITUTION: The polyester resin composition comprises mainly aliphatic (including alicyclic) dicarboxylic acid (or its anhydride) containing adipic acid; and aliphatic (including alicyclic) glycol containing at least one of 1,4-butane diol and ethyleneglycol. The composition further includes 0.1-30 wt.% of monomer containing at least one or two of amine groups as the functional radicals based on theoretical weight amount of the polyester. The composition is prepared by at least one or two of the condensation, esterification and ester-transfer reaction under the monomer then polycondensation. The composition has number mean molecular weight of 30,000-70,000, weight mean molecular weight of 160,000-600,000, a melting point of 45-60 deg.C. and a fusion viscosity (190 deg.C., 2,160g) of 0.1-50.
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