Claims
- 1. 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≦((A)−(B))/((A)+(B))≦0.006 (1); 1.01≦(D)/(C)≦1.08 (2); 0≦(E)≦40 (3); and (D)/(C)≧−0.002×(E)+1.04 (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).
- 2. A method for producing a thermotropic liquid crystalline polymer according to claim 1, wherein(I) an aromatic hydroxycarboxylic acid and an ester derivative thereof comprises the following composition: (Ia) hydroxybenzoic acid and an ester derivative thereof, and (Ib) hydroxynaphthoic acid and an ester derivative thereof, wherein molar ratio of (Ia)/((Ia)+(Ib))≧0. 9, and the catalyst is charged so as to satisfy the following equation (3′): 0≦(E)≦20 (3′).
- 3. A method for producing a thermotropic liquid crystalline polymer according to claim 1 or 2, all of the starting monomers I, II, III, and IV are aromatic compounds.
- 4. A method for producing a thermotropic liquid crystalline polymer according to claim 1 or 2, all of the starting monomers, the acylating agent, and the catalyst are charged into the same reactor, and the resultant mixture is caused to react.
- 5. A method for producing a thermotropic liquid crystalline polymer according to claim 1 or 2, hydroxyl groups and/or amino groups of the starting monomers I, III, and/or IV are acylated by the acylating agent, and subsequently, the acylated product is caused to react with the starting monomer II.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 09/690,479, filed Oct. 18, 2000, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4720424 |
Eickman et al. |
Jan 1988 |
A |
5155204 |
Parodi et al. |
Oct 1992 |
A |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09/690479 |
Oct 2000 |
US |
Child |
09/908495 |
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US |