Color improved polycarbonate compositions and molded articles
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United States of America Patent
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Sep 30, 1997
Grant Date -
N/A
app pub date -
Jul 15, 1996
filing date -
Jun 14, 1994
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A thermoplastic molding composition including at least one polycarbonate resin which is a polycarbonate homopolymer or copolymer; and an amount of at least one tetrahalobisphenol A copolymer effective to reduce the yellowness index of the at least one polycarbonate resin as determined after thermally molding the composition into an article. The article molded from the thermoplastic molding composition has a lower yellowness index than that of an article molded from a corresponding thermoplastic molding composition which does not contain any of the at least one tetrahalobisphenol A copolymer.
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