Method for manufacturing liquid crystal polyester and liquid crystal polyester
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United States of America Patent
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Jan 23, 2018
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Jul 24, 2012
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Jul 29, 2011
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Abstract
A method for manufacturing a liquid crystal polyester, comprising: a melt polycondensation step in which 0.001 to 1% by mass of a heterocyclic aromatic compound represented by the following formula (I) is added to a monomer mixture comprising at least one monomer selected from the group consisting of terephthalic acid, a terephthalic acid derivative, 2,6-naphthalenedicarboxylic acid and a 2,6-naphthalenedicarboxylic acid derivative, relative to 100% by mass of the monomer mixture, and then a melt polycondensation is conducted at a temperature of 240 to 300° C. so as to obtain a polymer.
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