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AssigneeMitsui Toatsu Chemicals, Inc.
InventorsTakeshi Kashima, Taiji Kameoka, Chojiro Higuchi, Masanobu Ajioka, Akihiro Yamaguchi
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A preparation process of aliphatic polyester having a weight average molecular weight of 15,000 or more by conducting a direct polycondensation reaction of an aliphatic polyhydric alcohol or a mixed aliphatic polyhydric alcohol and an aliphatic polybasic acid or a mixed aliphatic polybasic acid, or additionally a hydroxycarboxylic acid or a mixed hydroxycarboxylic acid or an oligomer of the hydroxycarboxylic acid in a reaction mixture containing an organic solvent. The aliphatic polyester thus obtained contains an extremely small amount of impurities, has low color and can exhibit satisfactory strength in the form of films, filaments and other shaped articles.
A preparation process of an aliphatic polyester having a weight average molecular weight of 15,000 or more, comprising using a monomer composition as a raw material of
An aliphatic polyester obtained by the preparation process of claim and having a weight average molecular weight of 15,000 or more.
An aliphatic polyester obtained by the preparation process of claim and having a weight average molecular weight of 50,000 or more.
Dependencies are inferred from the claim text.