Process for producing aromatic polyester

专利名称：Process for producing aromatic polyester发明人：Hiroaki Sugimoto,Kazuo Hayatsu,Masahiro

Fujiwara

申请号：US06/923261申请日：19861027公开号：US04713435A公开日：19871215

摘要：A process for producing an aromatic polyester by polycondensation of either

(1)

(a) aromatic hydroxycarboxylic acids containing at least 50 mole % of p-hydroxybenzoic acid, and/or ester-forming derivatives of these acids,< P>

(b) an aromatic dicarboxylic acid and/or an ester-forming derivative of aromaticdicarboxylic acid, and

(c) an aromatic dihydroxy compound and/or an ester-forming derivative of aromaticdihydroxy compound,

wherein the (a):(b) molar ratio and the (a):(c) molar ratio are each from 1:0 to 1:4, or

(2)

(d) aromatic dicarboxylic acids containing at least 50 mole % of terephthalic acid,and/or ester-forming derivatives of these acids and

(e) aromatic dihydroxy compounds containing at least 50 mole % of at least one ofhydroquinone, substituted hydroquinone, 4,4'-dihydroxydiphenyl, and substituted 4,4'-

dihydroxydiphenyl, and/or ester-forming derivatives of these dihydroxy compounds,

characterized in that the polycondensation is carried out by using a liquid compoundwhich has a higher boiling point at normal pressure than the temperature of this reactionand is inert to the reaction, in an amount satisfying the equation ##EQU1##

申请人：SUMITOMO CHEMICAL COMPANY, LIMITED

代理机构：Stevens, Davis, Miller & Mosher

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