LIQUID CRYSTAL TYPE POLYESTER SOLUTION COMPOSITION COMPRISING APROTIC SOLVENT AND LIQUID CRYSTAL TYPE POLYESTER FILM COMPRISING REPEATING UNIT DERIVED FROM AROMATIC AMINE DERIVATIVE, PREPARATION METHOD OF LIQUID CRYSTAL TYPE POLYESTER FILM USING THE COMPOSITION, AND LIQUID CRYSTAL TYPE POLYESTER FILM PREPARED BY THE METHOD

摘要

PURPOSE: Provided are a liquid crystal type polyester solution composition which is improved in corrosion resistance, shows an optical anisotropy when molten at a temperature below 450 deg.C and is easily treated, a method for preparing a liquid crystal type polyester film by using the composition and a liquid crystal type polyester film prepared by the method which has a low anisotropic mechanical strength. CONSTITUTION: The liquid crystal type polyester solution composition comprises 100 parts by weight of an aprotic solvent; and 0.01-100 parts by weight of a liquid crystal type polyester which comprises 10-35 mol% of at least one repeating unit selected from the group consisting of a repeating unit derived from an aromatic diamine, a repeating unit derived from an aromatic amine having a hydroxyl group and a repeating unit derived from an aromatic amino acid. Preferably the liquid crystal type polyester comprises 30-80 mol% of a repeating unit represented by -O-Ar1-CO-; 10-35 mol% of a repeating unit represented by -CO-Ar2-CO-; and 10-35 mol% of a repeating unit represented by -X-Ar3-Y-, wherein Ar1 is a 1,4-phenylene group, a 2,6-naphthalene group or a 4,4'-biphenylene group; Ar2 is 1,4-phenylene group, 1,3-phenylene group or a 2,6-naphthalene group; Ar3 is 1,4-phenylene group or 1,3-phenylene group; X is -NH-; and Y is -O- or -NH-.