Polycarbonate-polyamide alloy plastic for automobile parts, and preparation method thereof

A technology of auto parts and alloy plastics, which is applied in the field of auto parts materials, can solve the problems affecting the mechanical properties and practical effects of alloy materials, the selection of compatibilizers is difficult to control, and the effect of compatibilizers is different, so as to achieve excellent oil resistance, Excellent impact strength and excellent performance

Inactive Publication Date: 2020-06-16
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] According to the above, the preparation technology for PC / PA alloy in the existing scheme mainly has the disadvantage of two-phase incompatibility between PC and PA, and with the different ratios of PC and PA mass, the added compatibilizer Effects are also different, so that when PC / PA alloys are produced on a large scale, it is difficult to control the selection of compatibilizers when PC and PA have different mass ratios, which affects the mechanical properties and practical effects of alloy materials. The present invention proposes a kind of auto parts The above-mentioned technical problems can be effectively solved by using polycarbonate-polyamide alloy plastic and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Mix PC / PA mixed resin with compatibilizer, microporous aluminum fiber, antioxidant and heat stabilizer once, and combine PC / PA, compatibilizer and microporous aluminum fiber evenly by grinding to obtain fibrous Compatibilizer; the compatibilizer is compounded by SEBS-g-MAH and ethylene-acrylate-glycidyl methacrylate with a mass ratio of 1:1; the grinding adopts vibration grinding under nitrogen protection, and the grinding temperature The temperature is controlled at 50°C, and the grinding time is 30 minutes; the diameter of microporous aluminum fibers is 50-100nm, the length is 150-250μm, and the surface is covered with micropores;

[0026] (2) The fibrous compatibilizer prepared in step (1) is mixed with the PC / PA mixed resin for a second time, and melted, blended and extruded by a twin-screw extruder to obtain a PC / PA alloy plastic. The screw diameter of the twin-screw extruder is 65mm, the aspect ratio is 25:1, and the screw speed is 200r / min.

[0027] In the P...

Embodiment 2

[0031] (1) Mix PC / PA mixed resin with compatibilizer, microporous aluminum fiber, antioxidant and heat stabilizer once, and combine PC / PA, compatibilizer and microporous aluminum fiber evenly by grinding to obtain fibrous Compatibilizer; the compatibilizer is compounded by SEBS-g-MAH and ethylene-acrylate-glycidyl methacrylate with a mass ratio of 1:1; the grinding adopts vibration grinding under nitrogen protection, and the grinding temperature The temperature is controlled at 80°C, and the grinding time is 60 minutes; the diameter of microporous aluminum fibers is 50-100nm, the length is 150-250μm, and the surface is covered with microporous aluminum fibers;

[0032] (2) The fibrous compatibilizer prepared in step (1) is mixed with the PC / PA mixed resin for a second time, and melted, blended and extruded by a twin-screw extruder to obtain a PC / PA alloy plastic. The screw diameter of the twin-screw extruder is 65 mm, the aspect ratio is 30:1, and the screw speed is 250 r / min....

Embodiment 3

[0037] (1) Mix PC / PA mixed resin with compatibilizer, microporous aluminum fiber, antioxidant and heat stabilizer once, and combine PC / PA, compatibilizer and microporous aluminum fiber evenly by grinding to obtain fibrous Compatibilizer; the compatibilizer is compounded by SEBS-g-MAH and ethylene-acrylate-glycidyl methacrylate with a mass ratio of 1:1; the grinding adopts vibration grinding under nitrogen protection, and the grinding temperature Control at 50°C, grinding time 30min; microporous aluminum fiber with a diameter of 50-100nm, a length of 150-250μm, and the surface is covered with microporous aluminum fibers;

[0038] (2) The fibrous compatibilizer prepared in step (1) is mixed with the PC / PA mixed resin for a second time, and melted, blended and extruded by a twin-screw extruder to obtain a PC / PA alloy plastic. The screw diameter of the twin-screw extruder is 65mm, the aspect ratio is 25:1, and the screw speed is 200r / min.

[0039] In the PC / PA alloy plastics, in ...

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Abstract

The invention relates to the field of automobile part materials, and discloses a polycarbonate-polyamide alloy plastic for automobile parts, and a preparation method thereof. The preparation method comprises the following steps: (1) mixing a PC / PA mixed resin, a compatilizer, microporous aluminum fibers, an antioxidant and a heat stabilizer for the first time, and grinding to obtain a fibrous compatilizer; and (2) carrying out secondary mixing on the fibrous compatilizer and a PC / PA mixed resin, and carrying out melt blending extrusion to obtain the PC / PA alloy material. According to the invention, aluminum fibers are endowed with compatibility through primary mixing and grinding, then the compatibility of the aluminum fibers is enhanced during secondary mixing to enhance the compatible compounding of the PC / PA alloy material, and the microporous aluminum fibers are well dispersed in the alloy material, so that the polycarbonate-polyamide alloy plastic has excellent oil resistance andstress cracking resistance and is suitable for being processed into various automobile parts.

Description

technical field [0001] The invention relates to the field of auto parts materials, and discloses a polycarbonate-polyamide alloy plastic for auto parts and a preparation method thereof. Background technique [0002] Polycarbonate has the advantages of good mechanical strength, impact resistance, dimensional stability and good thermal stability, which make it have important and extensive application value in many traditional fields such as electronics industry, automobile industry, construction industry, medical equipment, etc. , and has expanded to the application range of high-end new industries such as aerospace and computers, and is an engineering material with excellent comprehensive performance. However, it also has defects such as poor processing fluidity, no resistance to solvent erosion, easy wear, easy stress cracking, and poor low-temperature toughness, which greatly limits its application. [0003] Polyamide, also known as nylon, is a general term for thermoplast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L69/00C08L51/00C08L23/08C08K7/24
CPCC08K2201/003C08K2201/004C08L69/00C08L77/00C08L2205/035C08L2205/08C08L51/003C08L23/0884C08K7/24
Inventor 陈庆
Owner CHENDU NEW KELI CHEM SCI CO LTD
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