Liquid crystal polymer composition, preparation method and application thereof

A liquid crystal polymer and composition technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of poor toughness and insufficient strength, and achieve the effect of improving the strength of weld lines, simple addition method, and good toughening effect

Active Publication Date: 2012-02-15
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defects of insufficient strength at the weld line of existing liquid crystal polymers and poor toughness of existing liquid crystal polymer thin-walled products, the primary purpose of the present invention is to provide a liquid crystal with better fluidity and higher strength at the weld line polymer composition

Method used

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  • Liquid crystal polymer composition, preparation method and application thereof
  • Liquid crystal polymer composition, preparation method and application thereof
  • Liquid crystal polymer composition, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A preparation method of a liquid crystal polymer composition, comprising the following steps:

[0053] (1) Dry the liquid crystal polymer Ueno LCP A2500 (composed of PHBA / HNA / BP / TA, melting temperature 340°C) at 170°C for 4-6 hours, so that the water content is below 0.1% by mass;

[0054] (2) Take 38% of the liquid crystal polymer obtained in step (1) and 1% of silicone powder, 1% of tetrafluoroethylene and hexafluoropropylene copolymer (FEP) and blend them in a high-mixer to obtain a premixed system;

[0055] (3) The premixed system obtained in step (2) is added into the extruder from the main feeding port of the twin-screw extruder through the loss-in-weight metering scale; 30% of circular cross-section glass fibers and 30% of talc The powder is fed into the extruder from the side feed port of the twin-screw extruder through a weight-loss weighing scale;

[0056] (4) extruding, drawing, cooling, and granulating to obtain a liquid crystal polymer composition;

[00...

Embodiment 2

[0059] A preparation method of a liquid crystal polymer composition, comprising the following steps:

[0060] (1) Dry the liquid crystal polymer Ueno LCP A2500 (composed of PHBA / HNA / BP / TA, melting temperature 340°C) at 170°C for 4-6 hours, so that the water content is below 0.1% by mass;

[0061] (2) Take 37% of the liquid crystal polymer obtained in step (1) and 1% of silicone powder, 2% of tetrafluoroethylene and ethylene copolymer (ETFE) and blend them in a high-speed mixer to obtain a premixed system ;

[0062] (3) The premixed system obtained in step (2) is added into the extruder from the main feeding port of the twin-screw extruder through a weight-loss metering scale; The flakes are fed into the extruder from the side feed port of the twin-screw extruder through a weight-loss weighing scale;

[0063] (4) extruding, drawing, cooling, and granulating to obtain a liquid crystal polymer composition;

[0064] The percentages are percentages corresponding to the mass of the...

Embodiment 3

[0066] A preparation method of a liquid crystal polymer composition, comprising the following steps:

[0067] (1) Dry the liquid crystal polymer Ueno LCP A2500 (composed of PHBA / HNA / BP / TA, melting temperature 340°C) at 170°C for 4-6 hours, so that the water content is below 0.1% by mass;

[0068] (2) Take 52% of the liquid crystal polymer obtained in step (1) and 1% of silicone powder, 2% of tetrafluoroethylene and hexafluoropropylene copolymer (FEP) and blend them in a high-mixer to obtain a premixed system;

[0069] (3) The premixed system obtained by step (2) is added into the extruder from the main feeding port of the twin-screw extruder through the loss-in-weight metering scale; The loss-in-weight weighing scale is fed into the extruder from the side feeding port of the twin-screw extruder;

[0070] (4) extruding, drawing, cooling, and granulating to obtain a liquid crystal polymer composition;

[0071] The percentages are percentages corresponding to the mass of the l...

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Abstract

The invention discloses a liquid crystal polymer composition, a preparation method and application thereof. The liquid crystal polymer composition is prepared from the following components in percent by mass: 30-60 percent of liquid crystal polymer, 15-35 percent of inorganic reinforcing agent, 5-35 percent of filler and 2-5 percent of toughening component, wherein the toughening component comprises silicone powder and fluorochemicals. The liquid crystal polymer composition has better flexibility and weld mark strength, and overcomes the defects of low weld mark strength and easiness in crispness of the traditional TLCP (talline polymer).

Description

technical field [0001] The invention belongs to the field of special engineering plastics, and in particular relates to a liquid crystal polymer composition and a preparation method and application thereof. Background technique [0002] Compared with other organic polymer materials, thermotropic liquid crystal polymer (TLCP) has a relatively unique molecular structure and thermal behavior. Its molecules are composed of rigid rod-shaped macromolecular chains. liquid crystal state. This unique phase structure endows TLCP with the following characteristics: self-reinforcing effect; small linear expansion coefficient; excellent heat resistance; self-flame retardancy; low melt viscosity and good fluidity; small molding shrinkage; chemical resistance Good sex and so on. [0003] TLCP also has its own shortcomings: at the point where the two strands of material converge in the mold cavity during molding, since the formation of crystals is oriented along the welding line, the stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/38C09K19/52C08L67/03C08L83/04C08L27/18C08K13/04C08K7/14C08K3/34C08K3/40C08K7/20
Inventor 易庆锋麦杰鸿蒋智强姜苏俊杨志骅郑明嘉曾祥斌
Owner KINGFA SCI & TECH CO LTD
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