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PC/ABS alloy with good-appearance high-intensity weld line and preparation method thereof

Inactive Publication Date: 2010-10-20
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the material, generally by adding compatibilizers such as SMA and PMMA, the weld line strength of the plastic can be improved, but the appearance of the weld line will not be improved.
In addition, by reducing the molecular weight of the base material, the flowability of the material can be improved (improve the appearance of the weld line), but the strength of the weld line will also be reduced
[0003] Previous patent reports only improve the compatibility of PC / ABS alloys by adding compatibilizers such as PMMA, so as to strengthen the strength of the weld line, but the effect is not good

Method used

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  • PC/ABS alloy with good-appearance high-intensity weld line and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 6

[0023] A method for preparing a PC / ABS alloy with good weld line appearance and high strength. The method is to prepare 50 parts by weight of bisphenol A polycarbonate with a molecular weight of 20,000, 40 parts by weight of ABS, and acrylate- 10 parts by weight of butadiene-styrene (MBS), 10 parts by weight of dioctyl phthalate (DOP), 0.5 parts by weight of antioxidant (1010), 0.5 part by weight of antioxidant (168) placed in medium speed In a mixer, mix for 30 minutes to obtain a mixed material, put the mixed material into a twin-screw extruder, control the screw speed at 600 rpm, melt and extrude, and granulate to obtain the product.

[0024] The molecular weight of the ABS is 80000, wherein the rubber content is 5wt%, the acrylonitrile content is 30wt%, and the styrene content is 65wt%.

[0025] The twin-screw extruder includes 10 temperature control zones, the temperature of temperature control zone 1-2 is 180-260°C, the temperature of temperature control zone 3-4 is 180-...

Embodiment 7

[0027] A method for preparing a PC / ABS alloy with good weld line appearance and high strength. The method is to prepare 70 parts by weight of bisphenol A polycarbonate with a molecular weight of 25,000, 30 parts by weight of ABS, and 80% of acrylate- 5 parts by weight of butadiene-styrene (MBS), 1 part by weight of dibutyl phthalate (DBP), and 0.1 part by weight of antioxidant (1010) are placed in a medium-speed mixer and mixed for 10 minutes to obtain a mixed material , put the mixed material in a twin-screw extruder, control the screw speed to 180rpm, melt extrusion, and granulate to obtain the product.

[0028] The molecular weight of the ABS is 150000, wherein the content of rubber is 30wt%, the content of acrylonitrile is 30wt%, and the content of styrene is 40wt%.

[0029] The twin-screw extruder includes 10 temperature control zones, the temperature of temperature control zone 1-2 is 180-260°C, the temperature of temperature control zone 3-4 is 180-260°C, and the temper...

Embodiment 8

[0031] A method for preparing a PC / ABS alloy with good weld line appearance and high strength. The method comprises 58 parts by weight of bisphenol A polycarbonate with a molecular weight of 23,000, 36 parts by weight of ABS, and acrylic acid with a rubber content of 60-80%. 8 parts by weight of ester-butadiene-styrene (MBS), 6 parts by weight of bisphenol A bisdiphenyl phosphate (BDP), 0.5 parts by weight of antioxidant (1076) were placed in a medium-speed mixer, and mixed for 20 minutes , to obtain the mixed material, put the mixed material into a twin-screw extruder, control the screw speed to 230rpm, melt extrude, and granulate to obtain the product.

[0032] The molecular weight of the ABS is 100000, wherein the rubber content is 20wt%, the acrylonitrile content is 10wt%, and the styrene content is 70wt%.

[0033] The twin-screw extruder includes 10 temperature control zones, the temperature of temperature control zone 1-2 is 180-260°C, the temperature of temperature cont...

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Abstract

The invention relates to a PC / ABS alloy with a good-appearance high-intensity weld line and a preparation method thereof. The PC / ABS alloy comprises the following components in part by weight: 50 to 70 parts of PC, 30 to 40 parts of ABS, 5 to 10 parts of toughening agent, 1 to 10 parts of weld line modifier, and 0.1 to 10 parts of antioxygen. The raw materials are put into an intermediate speed mixer to be mixed for 10 to 30 minutes so as to form mixed materials; and the mixed materials are put into a double-screw extruder, the rotating speed of the screw is controlled between 180 and 600 rpm, and the mixed materials are subjected to melt extrusion and granulation to form the product. Compared with the prior art, the PC / ABS alloy has the characteristics of good-appearance high-intensity weld line, and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a PC / ABS alloy with good weld line appearance and high strength and a preparation method thereof. Background technique [0002] PC / ABS alloy has excellent mechanical properties and thermal properties, and is widely used in the fields of automobiles, electronics and home appliances. However, due to the high viscosity of PC / ABS, when multiple gates are used or there are holes, inserts in the cavity, and the thickness of the product varies greatly, the plastic melt will flow in more than two directions in the mold. , when two melts meet, a weld line is formed in the product. Weld line is one of the most important defects of injection molding. It not only affects the appearance of the product but also has a certain impact on the strength of the product, and it is difficult to handle the weld line during post-processing such as painting and electroplating, so the weld line ...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L55/02C08K5/12C08K5/523B29B9/06B29C47/92B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/40B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 张毅徐本刚董建廷罗明华李荣群辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS
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