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Abstract

Aliphatic-aromatic copolyester comprising the repeating units, which comprise a dicarboxylic component and a dihydroxylic component:

description='In-line Formulae' end='lead'—[—O—(R₁₁)—O—C(O)—(R₁₃)—C(O)—]—description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'—[—O—(R₁₂)—O—C(O)—(R₁₄)—C(O)—]—.description='In-line Formulae' end='tail'

The dihydroxylic component comprises units —O—(R₁₁)—O— and —O—(R₁₂)—O— from diols, wherein R₁₁ and R₁₂ individually are selected from C₂-C₁₄ alkylene, C₅-C₁₀ cycloalkylene, C₂-C₁₂ oxyalkylene, heterocycles and mixtures thereof. The dicarboxylic component comprises units —C(O)—(R₁₃)—C(O)— from aliphatic diacids and units —C(O)—(R₁₄)—C(O)— from aromatic diacids, wherein R₁₃ is C₀-C₂₀ alkylene and mixtures thereof. The aromatic diacids comprise at least one heterocyclic aromatic diacid of renewable origin, and preferably furandicarboxylic acid. The molar percentage of the aromatic diacids is >90% and <100% of the dicarboxylic component. The aliphatic-aromatic copolyester has appreciable workability, toughness and high values for ultimate tensile strength and elastic modulus. It can be mixed with other polymers.

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First Claim