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Polyphthalamide composite material and preparation method thereof

A polyphthalamide and composite material technology, which is applied in the field of polyphthalamide composite material and its preparation, can solve the problems of poor physical properties and heat resistance, large wear of processing equipment, and high processing technology requirements. Achieve the effect of increasing melt flow rate, improving processing performance, and easy operation.

Inactive Publication Date: 2010-09-01
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that, for the polyphthalamide composite materials in the prior art, either the processing fluidity is poor, the processing technology is high and the processing equipment is worn out, or the physical properties and heat resistance are poor, Provide a polyphthalamide composite material with good fluidity, good physical properties and heat resistance

Method used

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Examples

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Effect test

Embodiment 1

[0042] In this embodiment, the polyphthalamide composite material includes the following raw materials in parts by weight: 78.8 parts by weight of polyphthalamide (parts by weight, the same below), 5 parts of thermotropic liquid crystal polymer, 15 parts of glass fiber, 0.2 parts of tetra(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester, 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite 0.5 part, 0.5 part of polysiloxane, 0.3 part of pentaerythritol stearate. In a preferred embodiment of the present invention, the thermotropic liquid crystal polymer is a main chain type thermotropic liquid crystal polymer; the melting range is 190-350° C.; the single fiber diameter of the glass fiber is 8-20 microns.

[0043] Preparation method: Weigh polyphthalamide, thermotropic liquid crystal polymer, tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester, tris(2 , 4-di-tert-butylphenyl) phosphite, polysiloxane, pentaerythritol stearate, ...

Embodiment 2

[0046]In this embodiment, the polyphthalamide composite material includes the following raw materials in parts by weight: 69.45 parts by weight of polyphthalamide (parts by weight, the same below), 10 parts of thermotropic liquid crystal polymer, 20 parts of glass fiber, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-( 0.05 part of 1H, 3H, 5H)-triketone and 0.5 part of polysiloxane.

[0047] In a preferred embodiment of the present invention, the thermotropic liquid crystal polymer is an aromatic copolyester; the melting range is 220-330° C.; the single fiber diameter of the glass fiber is 5-23 microns.

[0048] Preparation method: Weigh polyphthalamide, thermotropic liquid crystal polymer, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)- 1,3,5-triazine-2,4,6-(1H,3H,5H)-triketone, polysiloxane, mixed in a medium-speed mixer for 15 minutes, then added to twin-screw extrusion machine, and then 20 parts of glass fibers are fed into the twin-scr...

Embodiment 3

[0051] In this embodiment, the polyphthalamide composite material includes the following raw materials in parts by weight: 53.8 parts by weight of polyphthalamide (parts by weight, the same below), 15 parts of thermotropic liquid crystal polymer, 30 parts of glass fiber, 0.2 parts of N,N'-1,6-hexamethylene-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide], 0.2 parts of tris(2,4-di 0.2 parts of tert-butylphenyl) phosphite, and 0.8 parts of polysiloxane.

[0052] Preparation method: Weigh polyphthalamide, thermotropic liquid crystal polymer, N,N'-1,6-hexylidene-bis[3-(3,5-di-tert-butyl-4-hydroxy Phenyl) propionamide], tris (2,4-di-tert-butylphenyl) phosphite, polysiloxane, after mixing for 15 minutes, add to the twin-screw extruder, and feed 30 parts of glass fiber with side feed The material is fed into a twin-screw extruder, melted and blended, extruded and granulated to form the required polyphthalamide composite material. The temperature of each section in the twin-sc...

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Abstract

The invention relates to a polyphthalamide composite material and a preparation method thereof. The polyphthalamide composite material comprises the following raw materials in part by weight: 27.4 to 88.85 parts of polyphthalamide, 1 to 20 parts of thermotropic liquid crystalline polymer, 10 to 50 parts of glass fiber, 0.05 to 0.6 part of antioxidant and 0 to 2 parts of lubricant. The method comprises the following steps of: S1, weighing the polyphthalamide, the thermotropic liquid crystalline polymer, the antioxidant and the lubricant in proportion and mixing the raw materials for a period of time; and S2, adding the mixed raw materials into a double-screw extruder, adding the glass fiber into the mixture in proportion in a laterally feeding mode, fusing, extruding and pelletizing the mixture. The polyphthalamide composite material and the preparation method have the advantages of effectively reducing melt viscosity during processing, increasing melt flow rate, further improving material processing performance, lowering the fracture rate of the glass fiber and improving the mechanical property and thermal property of the composite material.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyphthalamide composite material and a preparation method thereof. Background technique [0002] Polyphthalamide (PPA) is a semi-aromatic polyamide made from terephthalic acid or phthalic acid, which is a semi-crystalline or non-crystalline thermoplastic functional material. The glass fiber reinforced PPA composite material has excellent comprehensive physical properties, good high temperature resistance, high rigidity, high strength, excellent dimensional accuracy and stability, low warpage, and good chemical resistance. Especially at high temperatures, it still has high rigidity, high strength, excellent dimensional accuracy and stability, which makes glass fiber reinforced PPA composite materials have broad application prospects in the fields of automobiles, electronics, and mechanical engineering. However, glass fiber reinforced PPA composites have poor process...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L67/00C08K9/04C08K7/14C08J5/08
Inventor 谢建达
Owner SHENZHEN KEJU NEW MATERIAL
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