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Semi-aromatic nylon modified composite material and preparation method thereof

The technology of semi-aromatic nylon and composite material is applied in the field of semi-aromatic nylon modified composite material and its preparation, which can solve the problems of restricting the application of high-temperature resistant nylon, difficult plastic processing equipment processing, expensive nylon and the like, and achieves cohesion. Can reduce, reduce melt viscosity, improve the effect of comprehensive performance

Pending Publication Date: 2020-07-24
HUBEI YANGTIAN PLASTIC PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melting point of aromatics is too high and the melt viscosity is too high, especially fully aromatic nylons, which are difficult to process with conventional plastic processing equipment; in addition, aromatic nylons are expensive and the supply is scarce, which limits the use of this type of high temperature resistant nylon. application

Method used

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  • Semi-aromatic nylon modified composite material and preparation method thereof
  • Semi-aromatic nylon modified composite material and preparation method thereof
  • Semi-aromatic nylon modified composite material and preparation method thereof

Examples

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preparation example Construction

[0026] A method for preparing a semi-aromatic nylon modified composite material, specifically: mixing the dried semi-aromatic nylon resin, lithium halide, and additives according to the required ratio, and then discharging them into a parallel twin-screw extruder for melt blending and extruding It can be granulated.

[0027] The raw material composition of the composite material also includes silane-modified calcium sulfate whiskers, the weight ratio of which to semi-aromatic nylon resin is 15-25:80-100, and the silane-modified calcium sulfate whiskers are prepared according to the following method get:

[0028] The anhydrous dead-burned calcium sulfate whisker, the crystal form modifier and the surface modifier are mixed, followed by washing, filtering and drying in sequence to obtain the silane-modified calcium sulfate whisker.

[0029] In the preparation method of the composite material, the extrusion process temperature of the twin-screw extruder is: 250±5°C in the first ...

Embodiment 1

[0048] A semi-aromatic nylon modified composite material, its raw material composition and weight ratio are: semi-aromatic nylon resin PA4T 80, lithium bromide 2, silane-modified calcium sulfate whisker 15, polytetrafluoroethylene micropowder 1, cyclic poly Ester 3, antioxidant 10760.3, antioxidant 168 0.3, wherein, the raw material composition and weight ratio of the silane-modified calcium sulfate whisker are: anhydrous dead-burned calcium sulfate whisker 80, dodecyl Trimethoxysilane 1, lithium chloride 2, liquid paraffin 1.

[0049] The above-mentioned composite material is prepared according to the following steps in turn:

[0050] Step 1. First add anhydrous dead-burned calcium sulfate whiskers and lithium chloride into the mixer according to the required ratio, set the temperature of the mixer at 105°C, stir at 950 rpm, and then add liquid paraffin The diluted dodecyltrimethoxysilane was stirred for 15 minutes, then the mixture was taken out, washed with water, filtered...

Embodiment 2

[0053] The difference with Example 1 is:

[0054] The raw material composition and weight ratio of the composite material are: semi-aromatic nylon resin PA4T 100, lithium bromide 3, silane-modified calcium sulfate whisker 25, polytetrafluoroethylene micropowder 2, cyclic polyester 5, antioxidant 1076 0.5. Antioxidant 168 0.5, wherein the raw material composition and weight ratio of the silane-modified calcium sulfate whiskers are: anhydrous dead-burned calcium sulfate whiskers 100, dodecyltrimethoxysilane 3, Lithium chloride 4, liquid paraffin 3.

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Abstract

The invention discloses a semi-aromatic nylon modified composite material. The raw material composition comprises the following components by weight: 80-100 parts of semi-aromatic nylon resin, 15-25 parts of silane modified calcium sulfate whiskers, 2-3 parts of lithium halide and 4.6-8 parts of an auxiliary agent. The preparation method comprises the following steps: mixing the dried semi-aromatic nylon resin, the silane modified calcium sulfate whiskers, the lithium halide and the auxiliary agent according to a required ratio, and then discharging the mixture into a parallel twin-screw extruder for melt blending, extrusion and granulation. According to the material, the melt viscosity and the extrusion process temperature are reduced, the comprehensive performance of the material is improved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a semi-aromatic nylon modified composite material and a preparation method thereof. The composite material can be processed by general plastic processing equipment, has low melt viscosity, moderate price and excellent comprehensive performance. Background technique [0002] Polyamide (PA), commonly known as nylon, is divided into aliphatic and aromatic nylon. It is one of the five major engineering plastics and has a wide range of uses. It has excellent mechanical strength, good toughness, stress cracking resistance, wear resistance and corrosion resistance. And good formability and so on. Aromatic nylon has excellent heat resistance and mechanical properties, good chemical resistance, is not easy to absorb moisture, and has good dimensional stability in precision molding. It can be used in peripheral parts of automobile engines, high temperature resistant e...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L27/18C08L67/00C08K13/06C08K9/06C08K7/08C08K3/16
CPCC08L77/06C08L2205/03C08L27/18C08L67/00C08K13/06C08K9/06C08K7/08C08K3/16
Inventor 胡承鹏
Owner HUBEI YANGTIAN PLASTIC PROD CO LTD
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