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High-melt-strength special compound for automobile tail fin and preparation method thereof

A technology of high melt strength and composition, which is applied in the field of high melt strength special composition for automobile tail fins and its preparation, can solve the problems of uneven product surface, insufficient melt strength, poor thermal stability, etc., and achieve improved melting Improve body strength, improve heat resistance, and improve the effect of heat resistance temperature

Active Publication Date: 2012-08-01
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The working principle of the present invention is to improve the melt strength and processing performance of the plastic base material through the special design of the components, and at the same time improve the heat resistance of the product, mainly to solve the melt problem existing in the domestic and foreign heat-resistant ABS blow molding automobile tail Insufficient strength, poor wall hanging, poor thermal stability, deformation in high and low temperature cycle tests, uneven product surface, etc.

Method used

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  • High-melt-strength special compound for automobile tail fin and preparation method thereof
  • High-melt-strength special compound for automobile tail fin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 60Kg acrylonitrile-butadiene-styrene copolymer, 30Kg styrene-maleic anhydride copolymer (15% MAH), 3Kg acrylonitrile-styrene-glycidyl methacrylate copolymer (10% GMA) and 0.3Kg of antioxidant was added into a high-speed mixer and stirred for 20 minutes before discharging to obtain a mixture. The weight average molecular weight of the acrylonitrile-butadiene-styrene copolymer is 100,000-200,000, the relative density is 1.03-1.05, and the average diameter range is 200-1000nm; wherein, the weight percentage content of butadiene is 10-20% The weight average molecular weight of the styrene-maleic anhydride copolymer is 100,000 to 300,000, and the glass transition temperature is 130 to 170°C; the weight average molecular weight of the acrylonitrile-styrene-glycidyl methacrylate copolymer 40,000 to 100,000.

[0023] The above mixture is extruded and granulated through a twin-screw extruder, the barrel temperature of the extruder is 180-260° C., and the screw speed is 180-600 ...

Embodiment 2～3

[0025] In order to better embody the characteristics of the above-mentioned high-melt strength special composition for automobile tail, the present invention uses the styrene-maleic anhydride copolymers of different maleic anhydride contents and the styrene-maleic anhydride copolymers of different dosages respectively using embodiments 2 to 3. Ethylene-maleic anhydride copolymers, acrylonitrile-styrene-glycidyl methacrylate copolymers with different glycidyl methacrylate contents, and different amounts of acrylonitrile-styrene-glycidyl methacrylate copolymers The impact of material properties, the specific preparation method is the same as in Example 1, and the specific material formulation is shown in Table 1. In addition, the parts by weight of the antioxidant in Examples 2 and 3 can be any value from 0.05 to 0.5. In order to enhance the comparability with Example 1, the part by weight selected here is 0.3.

Embodiment 6

[0030] Embodiment 6, physical performance detection

[0031] For the high-melt-strength automobile rear fin special composition prepared according to Examples 1-3 and Comparative Examples 1-3 above, test specimens were prepared according to the same injection molding conditions, and the specific physical performance testing items were as follows:

[0032] Tensile Strength: Measure tensile strength according to ASTM D 178;

[0033] Flexural strength and flexural modulus: tested according to standard ASTM D790 (3mm / min);

[0034] Izod notched impact strength: measure the notched impact strength according to ASTM D256 (1 / 8″ notch, 23°C);

[0035] Melt flow rate: measure the melt flow rate according to ASTM D1238 (220°C, 10Kg);

[0036] Heat distortion temperature (HDT): Under the condition of 1.82MPa, the heat distortion temperature is measured according to ASTM D648 (1 / 4", 120°C / hr).

[0037] The test results are shown in Table 2:

[0038] Table 2 Performance comparison of...

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Abstract

The invention relates to a high-melt-strength special compound for an automobile tail fin and a preparation method thereof. The high-melt-strength special compound for the automobile tail fin is prepared by melting, blending and extruding raw materials in a dual-screw extruder, wherein the raw materials comprise the following ingredients in parts by weight: 60-85 parts of acrylonitrile-butadiene-styrene copolymer, 10-30 parts of styrene-maleic anhydride copolymer, 3-10 parts of acrylonitrile-styrene-glycidyl methacrylate copolymer and 0.05-0.5 parts of antioxidant. The high-melt-strength special compound for the automobile tail fin has the characteristics of high melt strength, good vertical and transverse extension balance, good size stability, high heat distortion temperature, easiness of manufacturing and the like. The problems in heat-resistant ABS (Acrylonitrile Butadiene Styrene) blow molding automobile tail fin at home and abroad of poor melt strength, bad wall built-up, poor thermal stability, distortion in high-temperature and low-temperature cycling tests, unfairness on product surface and the like can be solved.

Description

technical field [0001] The invention specifically relates to a high-melt strength special composition for automobile tail fins and a preparation method thereof. Background technique [0002] With the rapid development of the automobile industry, the domestic and foreign demand for blow molding materials for automobile rear fins has risen sharply. The automotive industry usually requires that the car tail can be placed in an environment of 95-105°C for 24-168 hours without deformation. The car tail obtained by blow molding with ordinary ABS cannot meet this high heat resistance requirement. If heat-resistant ABS is used for blow molding, on the one hand, the heat-resistant monomer with a high glass transition temperature in the material is difficult to plasticize; on the other hand, after increasing the processing temperature to plasticize the heat-resistant ABS, the melt strength of the material decreases, resulting Poor blow molding. [0003] At present, there are also re...

Claims

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Application Information

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IPC IPC(8): C08L55/02C08L35/06C08L51/00C08J3/24B29B9/06B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 邱卫美费军周霆罗明华辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS
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