Composition for liquid crystal polymer synthesis, liquid crystal polymer for electrical/electronic products, polymer resin composition, and molded product using the same

A composition for liquid crystal polymer synthesis, comprising:

• an alicyclic dicarboxylic acid or its derivative;
• an aromatic diol;
• an aromatic monocarboxylic acid having 7 to 10 carbon atoms and containing a hydroxyl group;
• and
• an aromatic monocarboxylic acid having 11 to 20 carbon atoms and containing a hydroxyl group,
• wherein a molar ratio of the alicyclic dicarboxylic acid or its derivative is 0.9 to 1.1, with respect to 1 mol of the aromatic diol,
• wherein a total molar content of the alicyclic dicarboxylic acid or its derivative and the aromatic diol is 46 mol % to 80 mol % based on the overall composition,
• wherein a total molar content of the alicyclic dicarboxylic acid or its derivative, the aromatic diol, and the aromatic monocarboxylic acid having 7 to 10 carbon atoms and containing a hydroxyl group is 90 mol % or higher based on the overall composition,
• wherein a molar content of the aromatic monocarboxylic acid having 11 to 20 carbon atoms and containing a hydroxyl group is 1 mol % to 6 mol % based on the overall composition,
• wherein the alicyclic dicarboxylic acid or its derivative includes a cycloalkane dicarboxylic acid having 5 to 20 carbon atoms or an ester compound thereof,
• wherein the alicyclic dicarboxylic acid or its derivative is included in an amount of 33 mol % to 40 mol % based on 100 mol % of the composition for liquid crystal polymer synthesis,
• wherein the aromatic diol includes a benzenediol having 6 to 10 carbon atoms,
• wherein a liquid crystal polymer prepared by the composition for liquid crystal polymer synthesis has a comparative tracking index rating (as measured according to IEC standard 60112) of class 0, when a test specimen manufactured by a hot press to a size of 35 mm*35 mm*1 mm at a temperature of 20° C. higher than the melting temperature of the polymer is evaluated by a method of dropping standard pollutants on the test specimens according to IEC standard 60112 to measure the maximum voltage at which no tracking was generated by pollutants between two electrodes,
• wherein the cycloalkane dicarboxylic acid having 5 to 20 carbon atoms or an ester compound thereof includes at least one of 1,4-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1,4-dimethylcyclohexane dicarboxylate, 1,3-dimethylcyclohexane dicarboxylate, or 1,2-dimethylcyclohexane dicarboxylate,
• wherein the benzenediol having 6 to 10 carbon atoms includes at least one of hydroquinone or resorcinol,
• wherein the aromatic monocarboxylic acid having 7 to 10 carbon atoms and containing a hydroxyl group includes 4-hydroxybenzoic acid, and
• wherein the aromatic monocarboxylic acid having 11 to 20 carbon atoms and containing a hydroxyl group includes 6-hydroxy-2-naphthalenecarboxylic acid.