Production method of polycarbonate, and polycarbonate pellet
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United States of America Patent
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Jul 22, 2014
Grant Date -
Jan 30, 2014
app pub date -
Sep 30, 2013
filing date -
Mar 31, 2011
priority date (Note) -
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Abstract
The present invention relates to a method for producing a polycarbonate having excellent characteristics such as hue and mechanical properties with a stable quality and a high yield by solving a plurality of problems as those described above in producing a polycarbonate by using a specific dihydroxy compound exhibiting low thermal stability as compared with bisphenols and having a —CH2—O— structure. The polycarbonate obtained by polycondensation in the present invention is a polycarbonate having an appropriate viscosity despite decrease in the reaction temperature, providing for a color tone less susceptible to yellowing, and exhibiting excellent mechanical properties.
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