Optical film, retardation film, polarizing plate, and liquid crystal display device
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United States of America Patent
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Issued Date -
Jan 26, 2012
app pub date -
Jul 19, 2011
filing date -
Jul 20, 2010
priority date (Note) -
Abandoned
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Abstract
An optical film contains a cellulose ester and more than 30% by mass, relative to the cellulose ester, of a condensation product of at least one polyhydric alcohol having an average of 2.01 or more carbon atoms and at least one polybasic acid having an average of 4.10 or more carbon atoms, and at least one of the at least one polyhydric alcohol contains at least three carbon atoms bonded together without being interrupted by any other atom.
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