WHOLLY AROMATIC POLYESTER AND POLYESTER RESIN COMPOSITION
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United States of America Patent
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Issued Date -
Jul 31, 2014
app pub date -
Mar 28, 2012
filing date -
Apr 1, 2011
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Abandoned
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Abstract
A wholly aromatic polyester being excellent in heat resistance and toughness and being capable of being produced in an ordinary polymerization device, which exhibits optical anisotropy when it is molten, containing the constitutional unit (I) derived from 4-hydroxybenzoic acid, the constitutional unit (II) derived from 6-hydroxy-2-naphthoic acid, the constitutional unit (III) derived from 1,4-phenylenedicarboxylic acid, the constitutional unit (IV) derived from 1,3-phenylenedicarboxylic acid and the constitutional unit (V) derived from 4,4′-dihydroxybiphenyl, containing the constitutional unit (I) in an amount of 35 to 75 mol %, the constitutional unit (II) in an amount of 2 to 8 mol %, the constitutional unit (III) in an amount of 4.5 to 30.5 mol %, the constitutional unit (IV) in an amount of 2 to 8 mol %, the constitutional unit (V) in an amount of 12.5 to 32.5 mol %, the total of constitutional units (II) and (IV) being in an amount of 4 to 10 mol %.
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