Aliphatic polyester, polyester composition containing same, and use thereof

Abstract

The present invention provides an aliphatic polyester, a polyester composition containing the same, and use thereof. The aliphatic polyester includes a dicarboxylic acid residue, a diol residue, and a branching agent residue; the dicarboxylic acid residue includes the following residues: a1) based on a total molar percentage content of a1) and a2) as 100 mol %, 71-89 mol % of a succinic acid residue; and a2) based on the total molar percentage content of a1) and a2) as 100 mol %, 11-29 mol % of a sebacic acid residue; the diol residue is selected from a 1,4-butanediol residue with a molar content at least equal to that of the dicarboxylic acid residue; and based on a total mass of the aliphatic polyester as 100 wt %, a mass percentage content of the branching agent residue is 0.09-0.22 wt %. The aliphatic polyester solves the problem of low heat sealing strength of aliphatic polyesters.

Dependencies are inferred from the claim text.