| 摘要 |
<p>The invention provides a method for producing a thermotropic liquid crystalline polymer of high quality at high yield, which method includes polymerizing staring monomers I, II, III, and IV, i.e., (I) an aromatic hydroxycarboxylic acid, etc; (II) an aromatic dicarboxylic acid and an alicyclic dicarboxylic acid; (III) an aromatic diol, an alicyclic diol, an aliphatic diol, etc; and (IV) an aromatic hydroxylamine, an aromatic diamine, etc in the presence of an acylating agent, wherein the starting materials are charged so as to satisfy the following equations (1) to (4): <DFG> <DF NUM="(1);">0.0015 ≤ ((A) - (B))/((A) + (B)) ≤ 0.006 </DF> <DF NUM="(2);">1.01 ≤ (D)/(C) ≤ 1.08 </DF> <DF NUM="(3);">0 ≤ (E) ≤ 40 </DF> </DFG> and <DF NUM="(4),">(D)/(C)≥ -0.002x (E) + 1.04 </DF> 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).</p> |
