High-size-stability PA/ABS alloy and preparation method

An alloy, styrene technology, applied in the field of high dimensional stability PA/ABS alloy and preparation, can solve the problems of dimensional stability affecting the appearance of products, can not meet the requirements of dimensional accuracy, etc., to solve the problem of dimensional stability, product dimensional stability Good performance and low water absorption

Inactive Publication Date: 2017-06-13
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the PA / ABS alloy reduces the water absorption rate of PA to a certain extent, it still cannot meet the occasions with high dimensional accuracy requirements, especially in the largest automotive field. Due to dimensional stability, assembly problems such as assembly problems have greatly affected The appearance of the product increases the defect rate of the product

Method used

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  • High-size-stability PA/ABS alloy and preparation method
  • High-size-stability PA/ABS alloy and preparation method
  • High-size-stability PA/ABS alloy and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0023] The preparation method of embodiment 1-7 and comparative example 1-3 comprises the following steps:

[0024] First, add fully dried PA, ABS, compatibilizer, heat-resistant agent and additives (the specific parts are subject to Table 1) into a high-speed mixer and mix well. After mixing completely, pass through a precision metering feeding device. The material is sent into the twin-screw extruder, and the material is fully fused under the shearing, mixing and conveying of the screw, and finally extruded, drawn, and cooled to make pellets. The temperature of the twin-screw extruder is Set to 215-245°C. The performance test results are shown in Table 2.

[0025] Table 1

[0026]

[0027] In Table 1: the PA used in Examples 1-7 is polyhexamethylene terephthalamide-co-hexamethylene sebacamide copolymer, with a melting point of 230° C.; ABS is acrylonitrile-butadiene-styrene branch copolymer, the rubber content is 60%; the rubber particle size is 350nm. Heat-resistant ...

Embodiment 8

[0032] A preparation method of high dimensional stability PA / ABS alloy, comprising the following steps,

[0033] Fully dry 50 parts of PA, 50 parts of ABS, 3 parts of compatibilizer SMA, 8 parts of heat-resistant agent styrene-N-phenylmaleimide-acrylonitrile copolymer and 1 part of auxiliary agent, and mix well. , the material is fed into the twin-screw extruder through a precision metering feeding device, and the material is fully fused under the shearing, mixing and conveying of the screw, and finally extruded, drawn, and cooled to make pellets To obtain the PA / ABS alloy, the temperature of the twin-screw extruder is set at 215-245°C.

[0034] PA is polyhexamethylene terephthalamide-co-hexamethylene sebacamide copolymer, with a melting point of 230°C.

[0035] ABS is an acrylonitrile-butadiene-styrene graft copolymer with a rubber content of 60% and a rubber particle size of 350nm.

[0036] The additives include 0.2 parts of antioxidant 1098 and 0.3 parts of antioxidant S-...

Embodiment 9

[0038] A preparation method of high dimensional stability PA / ABS alloy, comprising the following steps,

[0039] Fully dry 70 parts of PA, 30 parts of ABS, 8 parts of compatibilizer ABS-g-GMA, 6 parts of heat-resistant agent styrene-N-m-tolylmaleimide copolymer and 1.15 parts of additives and mix well, mix After completion, the material is fed into the twin-screw extruder through the precision metering feeding device, and the material is fully fused under the shearing, mixing and conveying of the screw, and finally extruded, drawn, and cooled to make The pellets were obtained from PA / ABS alloy, and the temperature of the twin-screw extruder was set at 215-245°C.

[0040] PA is polyhexamethylene terephthalamide-co-hexamethylene sebacamide copolymer, with a melting point of 230°C.

[0041] ABS is an acrylonitrile-butadiene-styrene graft copolymer with a rubber content of 60% and a rubber particle size of 350nm.

[0042] The additives include 0.2 parts of antioxidant 1098 and 0...

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Abstract

The invention discloses a PA / ABS alloy which is prepared from the following components in parts by weight: 40 to 80 parts of PA, 20 to 60 parts of ABS, 0.5 to 8.5 parts of a compatilizer, 1 to 9 parts of a heat resistant agent and 0.25 to 1.75 parts of an adjuvant. The invention further discloses a preparation method of the PA / ABS alloy. The preparation method comprises the following steps: fully and uniformly mixing 40 to 80 parts of the PA, 20 to 60 parts of the ABS, 0.5 to 8.5 parts of the compatilizer, 1 to 9 parts of the heat resistant agent and 0.25 to 1.75 parts of the adjuvant, conveying the materials into a double-screw extruder through a precision metering material conveying device after the mixing is completed, fully fusing the materials under the shearing, mixing and conveying action of screws, and finally carrying out extrusion, drawing and cooling to obtain particles, and obtaining the PA / ABS alloy. According to the PA / ABS alloy disclosed by the invention, the problem on the size stability of the PA / ABS alloy is fundamentally solved, and the PA / ABS alloy can be widely applied to automobile parts with requirements for high size precision.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a PA / ABS alloy with high dimensional stability and a preparation method. Background technique [0002] PA (polyamide) has become one of the important engineering plastics due to its excellent mechanical strength, wear resistance, self-lubrication and corrosion resistance. However, its high water absorption, poor dimensional stability, low temperature and low dry impact greatly limit its application in certain fields. Blending PA and ABS to obtain PA / ABS alloy combines the advantages of PA and ABS, and at the same time obtains unique advantages that the two do not have, and has attracted much attention, such as matte effect, sound absorption and shock absorption, and alloy notch impact strength. Up to 1000J / m, it is the engineering plastic alloy with the highest impact strength so far. [0003] Although the PA / ABS alloy reduces the water absorption rate of PA to a cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L55/02C08L35/06C08L25/08C08K5/20C08K5/524B29C47/92B29C48/92
CPCC08L77/06B29C48/92B29C2948/92704C08K2201/014C08L2205/025C08L2205/035C08L55/02C08L35/06C08L25/08C08K5/20C08K5/524
Inventor 杨桂生李庆丰
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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