Process for the manufacture of unsaturated polyester resins
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United States of America Patent
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Aug 18, 1981
Grant Date -
N/A
app pub date -
Mar 13, 1980
filing date -
Mar 13, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a process for producing styrene-soluble unsaturated polyester resins from DMT process residue. In a preferred embodiment of the process, DMT process residue is transesterified with propylene glycol until a hydroxyl-terminated ester product having a methoxyl content within a specified range is formed and then the resulting ester product is esterified with maleic anhydride.
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