Polyester containing residues of a 1-hydroxy-3-6-bis(hydroxyalkoxy)xanth-9-one, process for preparing same and shaped articles thereof
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United States of America Patent
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Jun 26, 1984
Grant Date -
N/A
app pub date -
Sep 27, 1982
filing date -
Oct 2, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A new linear polyester contains in its chain the residues of a hydroxy-bis(hydroxyalkoxy)xanth-9-one e.g. polyethylene terephthalate containing such residues which act as a UV stabilizer. Processes for the preparation of the polymers include the reaction of a dibasic acid, glycol and 1,3,6-trihydroxyxanthone whereby only two of the xanthone hydroxyl groups take part in the polyester-forming reaction.
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