Patent ID: 6114492
Filing Date: 2000-09-05
Classification: C08G

Abstract:
A process for preparing an anisotropic melt-phase forming polymer consisting essentially of recurring units I, II, III, IV and V, wherein:recurring unit I is: ##STR15## recurring unit II is: ##STR16## recurring unit III is:--O--Ar.sup.1 --O--wherein Ar.sup.1 is a divalent radical selected from the group consisting of: ##STR17## and mixtures thereof, recurring unit IV is: ##STR18## wherein Ar.sup.2 is selected from the group consisting of: ##STR19## and mixtures thereof, and recurring unit V is: ##STR20## which process comprises reacting the aromatic diacid from which recurring unit IV is derived and acetate form of the reactants from which recurring units I, II, III and V are derived in the presence of a catalytic amount of a catalyst system comprising a potassium catalyst in combination with a cobalt catalyst.