Elimination of monocarbonate from polycarbonate
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United States of America Patent
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Jul 3, 1990
Grant Date -
N/A
app pub date -
Nov 16, 1988
filing date -
Nov 16, 1988
priority date (Note) -
Expired
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Abstract
A polycarbonate composition, and process for making same, wherein the monocarbonate and dicarbonate content is eliminated or limited to negligibly low levels by withholding introduction of chain terminator to the reaction mixture until the reaction of dihydroxy and carbonic acid derivative starting materials has run substantially to completion.
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