LCP RESIN, PREPARATION METHOD THEREFOR, AND LCP FIBER

• Main Authors: HUANG, Xianbo, CHEN, Pingxu, JIANG, Sujun, TANG, Dahang, XIAO, Zhongpeng, YE, Nanbiao
• Format: Patent
• Language: Chinese; English; French
• Published: 06.06.2024
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP

Disclosed are an LCP resin, a preparation method therefor, and an LCP fiber. The LCP resin comprises repeating units derived from the following monomers: (A) p-hydroxybenzoic acid, (B) 2-hydroxy-6-naphthoic acid, and (C) a characteristic monomer, wherein the (C) characteristic monomer is any one or more of trimesic acid or pyromellitic acid, a tensile strain rate γ1 when a melt of the LCP resin at a temperature Tm+20°C starts to exhibit a tensile hardening behavior satisfies 1.2s-1≤γ1≤3s-1, a tensile strain rate γ2 when the tensile hardening behavior ends satisfies 5s-1≤γ2≤20s-1, and Tm is the melting point of the LCP resin. The LCP resin of the present invention has a good continuous spinning performance by means of introducing a certain amount of the characteristic monomer and exhibiting specific tensile hardening behaviors, and may be prepared into a superfine filament fiber having a fineness of less than 10d by means of melt extrusion spinning. The prepared superfine filament fiber has uniform fineness, h