Liquid crystal polyester, molding composition composed of liquid crystal polyester and application of molding composition

• Main Authors: Xiao Zhongpeng, Xu Borong, Luo Debin, Cao Min, Song Caifei, Jiang Sujun, Cai Tongmin, Li Wenda, Sun Huawei, Zhou Guangliang, Yi Qingfeng, Ceng Xiangbin
• Format: Patent
• Language: Chinese; English
• Published: 17.08.2016
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention discloses liquid crystal polyester, a molding composition composed of the liquid crystal polyester and an application of the molding composition. The liquid crystal polyester is composed of repetitive structural units represented by the formula [I] and the formula [II]; according to 100 mol% of the total amount of the repetitive units, the amount of the structural unit [I] derived from p-hydroxybenzoic acid is greater than or equal to 50 mol%, preferably greater than or equal to 66 mol% and less than or equal to 85 mol%; the amount of the structural unit [II] derived from 6-hydroxy-2-naphthoic acid is less than or equal to 50 mol%, preferably greater than or equal to 15 mol% and less than or equal to 34 mol%. Through differential scanning calorimetry DSC testing, the liquid crystal polyester meets a condition that the double enthalpy ratio [delta]H defined by the following formula (1) is greater than or equal to 0.05 and less than or equal to 0.9, preferably greater than or equal to 0.1 and less