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Polyamide composition and preparation method thereof

A technology of polyamide composition and thermoplastic polyamide, which is applied in the field of modification of polyamide composition, and can solve problems such as poor fluidity, fiber leakage, and high viscosity

Active Publication Date: 2015-08-05
SHANGHAI KINGFA SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the use of epoxy resin as a chain extender, the viscosity is too high, the fluidity is poor, the fiber leakage is serious, and the surface gloss is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-14

[0065] The polyamide compositions in Examples 1-14 are sequentially prepared from the raw materials in columns E1-E14 in Tables 1-2. Its preparation method is:

[0066]Before extrusion, the thermoplastic polyamide resin pellets are dried until the moisture content is lower than 1500ppm, and then the ingredients except glass fiber are blended in proportion and put into the main feeder of the twin-screw extruder, and then passed through the twin-screw extruder. Extrusion granulation, the processing conditions are: the temperature of the first zone is 240°C, the temperature of the second zone is 260°C, the temperature of the third zone is 260°C, the temperature of the fourth zone is 260°C, the temperature of the fifth zone is 260°C, the temperature of the sixth zone is 270°C, the temperature of the seventh zone is 270°C , the temperature in the eighth zone is 275°C, and the temperature in the ninth zone is 280°C; the speed of the host is 350 rpm. Glass fiber is added by side fee...

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PUM

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Abstract

The invention provides a polyamide composition and a preparation method thereof. The polyamide composition has high melt strength and is characterized in comprising thermoplastic polyamide resin and a maleic anhydride copolymer. The maleic anhydride copolymer is obtained through alternating copolymerization or block copolymerization of maleic anhydride and one or two monomers comprising alkenyl. The composition provided by the invention has relatively high melt strength and hydrolysis resistance.

Description

technical field [0001] The invention relates to the field of modification of polyamide compositions, in particular to the field of modification of polyamide compositions applied to auto parts, in particular to a multi-component application of extrusion blow molding foaming with high melt strength and hydrolysis resistance Polyamide composition and its preparation method. Background technique [0002] Due to their excellent mechanical properties, chemical resistance, processability, and heat-oxidative aging resistance, polyamide compositions are often used in the electronics and motor vehicle industries that have strict requirements on the working environment. Among them, the peripherals of motor vehicle engines applications are particularly common. In order to achieve the goal of reducing weight, saving energy and reducing emissions, more and more automotive metal parts are replaced by nylon. However, with the particularity of the component structure, more and more nylons ...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/02C08L35/00C08L53/00C08L51/06C08K7/14C08K5/092C08K5/17C08K5/053
CPCC08L77/02C08L77/06C08L2201/08C08L2203/14C08L2205/03C08L35/00C08K7/14C08L53/00C08L51/06
Inventor 林洁龙王定华丁正亚肖军华李志路刘晓亮
Owner SHANGHAI KINGFA SCI & TECH
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