| 摘要 |
PURPOSE: A copolyester resin obtained from at least one kind of bifunctional glycol, aliphatic polyester and derivatives thereof, and a process for producing copolyester resin prepared from aromatic acid ester and derivatives thereof are provided. Therefore, the obtained resin satisfies excellent physical properties and biodegradability. CONSTITUTION: This copolyester resin is obtained by using one or more diol monomers selected from ethylene glycol and 1,4-butanediol; a bifunctional aliphatic carboxylic acid-based monomer of dimethylsuccinate or a bifunctional aliphatic carboxylic acid-based monomer of succinic acid; and a polyfunctional aromatic carboxylic acid-based monomer of terephthalic acid, isophthalic acid, pyromellitic acid, trimethylpyrotrimellitate, dimethylterephthalate or dimethylisophthalate, wherein the weight ratio of ethylene glycol to 1,4-butanediol of the diol monomer is 30:70 to 0:100 and the weight ratio of aliphatic to aromatic of the carboxylic acid-based monomer is 60:40 to 99:1.
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