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Method for preparing liquid crystal nylon alloy

A nylon and alloy technology, which is applied in the field of preparing liquid crystal nylon alloy, can solve the problems of poor fluidity and dissatisfaction, and achieve the effect of reducing cost, reducing dosage, and good processing stability

Inactive Publication Date: 2011-06-01
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although semi-aromatic polyamide has good temperature resistance, it has poor fluidity during processing, and some problems will occur during injection molding; especially when injecting thin-walled parts, there will be insufficient injection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] After crushing 8.5kg of liquid crystal oligomer and 1.5kg of high temperature nylon oligomer, add them to the reactive screw, add 100g of trimesic acid, react for 3 hours, extrude and cut into pellets, increase the viscosity of the pellets in solid phase for 10 hours, and complete reaction.

Embodiment 2

[0024] After crushing 5.0kg of liquid crystal oligomer and 5.0kg of high temperature nylon oligomer, add them to the reactive screw, add 100g of trimesic acid, react for 3 hours, extrude and cut into pellets, increase the viscosity of the pellets in solid phase for 16 hours, and complete reaction.

Embodiment 3

[0026] After crushing 1.5kg of liquid crystal oligomer and 8.5kg of high temperature nylon oligomer, add them to the reactive screw, add 100g of trimesic acid, react for 3 hours, extrude and cut into pellets, increase the viscosity of the pellets in solid phase for 12 hours, and complete reaction.

[0027] The properties of Examples 1-3 are shown in Table 1.

[0028] Table 1

[0029] Example

[0030] It can be seen from Table 1 that the appearance is uniform and there is no phase separation.

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PUM

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Abstract

The invention discloses a method for preparing a liquid crystal nylon alloy. The method comprises the following steps: grinding liquid crystal oligomer and high temperature nylon oligomer, adding in a reactive screw extruder, adding a compatilizer, reacting, performing extrusion, pelletizing and tackifying solid aggregate to ensure that the relative viscosity is 2.0-3.0. By adopting the preparation method in the invention, the dosage of liquid crystals is reduced and the cost is lowered. In addition, as the compatilizer is used in the preparation method, the prepared liquid crystal nylon alloy has good surface compatibility, heat resistance, melt liquidity and processing stability and can not corrode moulds.

Description

technical field [0001] The invention relates to a method for preparing liquid crystal nylon alloy. Background technique [0002] Liquid crystal is an excellent engineering plastic, but its production cost is too high, and its application is greatly restricted. Semi-aromatic polyamide is a polyamide resin prepared by polycondensation of diamines or dicarboxylic acids with aromatic rings and aliphatic dicarboxylic acids or diamines, and is one of the aromatic polyamides. Due to the introduction of aromatic rings into the main chain of polyamide molecules, the heat resistance and mechanical properties are improved, the water absorption rate is reduced, and it has a more suitable performance / price ratio. It is between general engineering plastic nylon and high temperature resistant engineering plastics. A resin with high heat resistance between PEEK and mainly used in the automotive and electrical and electronic industries. [0003] Although semi-aromatic polyamides have good ...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/06C08L67/04C08K5/092B29B9/06
Inventor 罗湘安曹民饶先花代惊奇曾祥斌蔡彤旻
Owner KINGFA SCI & TECH CO LTD
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