Patent ID: 6482915
Filing Date: 2002-11-19
Classification: C08F

Abstract:
A method for producing a thermotropic liquid crystalline polymer, which method comprises polymerizing starting monomers in the presence of an acylating agent, said starting monomers comprising a carboxyl group-containing compound, a hydroxyl group-containing compound, an amino group-containing compound, an ester derivative thereof, and/or an amide derivative thereof, which are selected from the group consisting of compounds represented by the following components I, II, III, and IV:(I) an aromatic hydroxycarboxylic acid and an ester derivative thereof; (II) an aromatic dicarboxylic acid and an alicyclic dicarboxylic acid; (III) an aromatic diol, an alicyclic diol, an aliphatic diol, and an ester derivative thereof; and (IV) an aromatic hydroxyamine, an aromatic diamine, an ester derivative thereof, and an amide derivative thereof, wherein the starting monomers, the acylating agent, and a catalyst are charged so as to satisfy the following equations (1) to (4): 0.0015&lE;((A)âˆ’(B))/((A)+(B))&lE;0.006â€ƒâ€ƒ(1); 1.01&lE;(D)/(C)&lE;1.08â€ƒâ€ƒ(2); 0&lE;(E)&lE;40â€ƒâ€ƒ(3); â€ƒand (D)/(C)&gE;âˆ’0.002Ã—(E)+1.04â€ƒâ€ƒ(4), wherein(A) denotes the total amount by equivalent (with respect to a carboxyl group) of starting monomers I and/or II; (B) denotes the total amount by equivalent (with respect to a hydroxyl group, an amino group, an ester derivative group thereof, and an amide derivative group thereof) of starting monomers I, III, and/or IV; (C) denotes the total amount by equivalent (with respect to a hydroxyl group and an amino group) of starting monomers I, III, and/or IV; (D) denotes the amount by equivalent of an acylating agent; and (E) denotes the amount of a catalyst (as reduced to amount by weight of metal, unit: ppm).