METHOD FOR PURIFYING AN ALIPHATIC POLYESTER
The present invention relates to a continuous process for purifying a chain-extended aliphatic polyester constructed from aliphatic dicarboxylic acids and aliphatic diols in a degassing apparatus, wherein the crude polyester is degassed for 3 to 30 minutes at a pressure of 0.01 to 5 mbar in the pres...
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Main Authors | , , , |
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Format | Patent |
Language | English |
Published |
19.11.2020
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Subjects | |
Online Access | Get full text |
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Summary: | The present invention relates to a continuous process for purifying a chain-extended aliphatic polyester constructed from aliphatic dicarboxylic acids and aliphatic diols in a degassing apparatus, wherein the crude polyester is degassed for 3 to 30 minutes at a pressure of 0.01 to 5 mbar in the presence of 1% to 7% by weight, based on the total weight of the crude polyester, of an entraining agent. |
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Bibliography: | Application Number: US201816765857 |