| 摘要 |
PURPOSE:To obtain the title polymer which has good heat resistance and excellent moldability and can be used for injection moldings, films, fibers, etc., wherein all of the residues of component monomers contain an aromatic unit and are present in a specified ratio. CONSTITUTION:A wholly aromatic polyester-amide comprising 3,3'- biphenyldicarboxylic acid residues of formula I, aromatic dicarboxylic acid residues of formula II, aromatic dihydroxy compound residues of formula III, aromatic hydroxycarboxylic acid residues of formula IV, aromatic aminocarboxylic acid residues of formula VI and aromatic aminooxy residues of formula VII (wherein R<1>, R<2>, R<3>, R<4>, R<7> and R<9> are each a bivalent aromatic hydrocarbon group or the like, R<1> is not a 3,3'-biphenyl group and R<5>, R<6>, R<8> and R<10> are each H or an aliphatic or aromatic hydrocarbon group), wherein said residues are present in amounts satisfying the relationships of 2<= the residues of formula I <=50eq%, and 0<= the residues of each of formulas II-VII <=50eq%, residues of formula III, residues of formula IV and residues of formula VII are not 0eq% at the same time, residues of formula V, residues of formula VI and residues of formula VII are not 0eq% at the same time, and the melt viscosity at 275 deg.C and 100sec<-1> is 50P or above.
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