Liquid crystal polyester composition as well as preparation method and application thereof

• Main Authors: ZHOU GUANGLIANG, JIANG SUJUN, LIU YAO, CHEN PINGXU, XIAO ZHONGPENG, YE NANBIAO, SONG CAIFEI
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2024
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; 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 liquid crystal polyester composition comprises the following components in parts by weight: 38-70 parts of liquid crystal polyester; 10 to 20 parts of carbon fiber; 10 to 20 parts of hollow glass beads; wherein the average retention length of the carbon fibers is 120-150 microns, the diameter ranges of the hollow glass beads are as follows: D50 is 22-28 microns, D90 is 37-43 microns, the density is 0.40-0.44 g/cm < 3 >, and the compressive strength is 7000-9000 Psi; the content of the polyarylester is 1-15% of the sum of the weight parts of the carbon fibers and the hollow glass beads; polyarylester is bisphenol A polyarylester, terephthalic acid accounts for 40-60 mol% of the dicarboxylic acid unit, and isophthalic acid accounts for 40-60 mol% of the dicarboxylic acid unit. The liquid crystal polyester composition provided by the invention has the advantages of good mechanical properties, good thin-wall formability, low anisotropy and low density, and is suitable for injection molding of sound equipment