Importance

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Abstract

This invention relates to a biodegradable copolyester composition, comprising: a) from 40 to 60 mol %, based on total mole of a) and b), of aromatic dicarboxylic acid selected from benzene dicarboxylic acid or ester derivative of said acid; b) from 40 to 60 mol %, based on total mole of a) and b), of a mixture of aliphatic dicarboxylic acid, wherein b) comprising: b1) from 20 to 80 mol %, based on mole of b), of at least one aliphatic dicarboxylic acid having 2 to 6 carbon atoms; and b2) from 20 to 80 mol %, based on mole of b), of at least one aliphatic dicarboxylic acid having 7 to 14 carbon atoms; c) at least one mole equivalent, based on total mole of a) and b), of diol having 2 to 6 carbon atoms; and d) from 0.1 to 2.0 mole % based on total mole of a), b), c), and d), of alcohol with at least 3 hydroxyl groups. The biodegradable copolyester composition according to this invention has improved thermal property, mechanical property, and biodegradability.

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First Claim