Polycarbonate resin composition
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United States of America Patent
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May 12, 1992
Grant Date -
N/A
app pub date -
Aug 28, 1990
filing date -
Sep 6, 1989
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Expired
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Abstract
A polycarbonate resin composition improved in heat resistance by the addition of an organic cyclic phosphite represented by the general formula: ##STR1## wherein R.sub.1 represents an alkyl group having 1 to 9 carbon atoms; R.sub.2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and R.sub.3 represents an alkyl group having 1 to 30 carbon atoms.
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