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|1. (WO2017177922) LIQUID CRYSTAL POLYESTER COMPOSITION|
|Applicants:||KINGFA SCI. & TECH.CO., LTD.
|Title:||LIQUID CRYSTAL POLYESTER COMPOSITION|
Disclosed in the present invention is a liquid crystal polyester composition. The weight content of a metal chromium element ranges from 0.1 ppm to 500 ppm on the basis of the total weight of the liquid crystal polyester composition. The method for measuring the weight content of a metal chromium element comprises: drying a liquid crystal polyester composition in the temperature of 120ºC for 4 hours, taking out 1 g of a sample to be treated, adding nitric acid and hydrogen peroxide, carrying out heating for 2 hours, and continuously adding nitric acid and hydrogen peroxide in the process; and after the dissolution of the sample is completed, taking the dissolved sample, and analyzing the weight content of a metal chromium element by using the 720ES full-automatic inductive coupling plasma atomic emission spectrometer produced by the Agilent company. In the present invention, when the weight content of the metal chromium element added in the liquid crystal polyester composition ranges from 0.1 ppm to 500 ppm on the basis of the total weight of the liquid crystal polyester composition, the high-temperature resistance stability of the obtained liquid crystal polyester composition is unexpectedly and remarkably improved.