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A kind of pc/abs alloy with excellent welding line appearance and high strength and preparation method thereof

A welding line, high strength technology, applied in the field of PC/ABS alloy and its preparation, PC/ABS alloy, can solve the problems of poor effect, reduce the impact performance of materials, etc., achieve excellent weld line appearance, improve strength, and good appearance capacitive effect

Active Publication Date: 2017-07-21
SHANGHAI KUMHO SUNNY PLASTICS
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The previous patents only improved the compatibility of PC / ABS by adding PMMA, SMA or SAG alone, so as to improve the strength of the weld line, but the effect was not good
Chinese patent CN101864159A discloses a PC / ABS alloy with excellent weld line appearance and high strength and its preparation method. DOP, DBP and BDP are used to improve the strength of PC / ABS weld line, but the use of this plasticizer improves the appearance of weld line, improves Weld line strength while reducing the impact properties of the material

Method used

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  • A kind of pc/abs alloy with excellent welding line appearance and high strength and preparation method thereof
  • A kind of pc/abs alloy with excellent welding line appearance and high strength and preparation method thereof
  • A kind of pc/abs alloy with excellent welding line appearance and high strength and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 5

[0042] A method for preparing a PC / ABS alloy with excellent weld line appearance and high strength. The method comprises 80 parts by weight of 7025PJ type PC resin, 15 parts by weight of ABS3453 resin, 5 parts by weight of EM500 toughening agent, and 1 part by weight of SAG001 compatibilizer. , 0.5 parts by weight of EHP-g-SAN compatibilizer, 0.3 parts by weight of n-octadecyl propionate antioxidant, simethicone 0.2 parts by weight of lubricant is mixed uniformly in a high-speed mixer, and the uniformly mixed material is added to a twin-screw extruder for melt blending and extrusion. The extrusion temperature is controlled at 170-230°C, the screw speed is 200-500rpm, and the pressure is 2 ~3MPa, the product is obtained after underwater pelletizing and drying.

Embodiment 6

[0044] This example is basically the same as Example 3, except that Bayer's 2800 type PC resin is used to prepare a PC / ABS alloy with excellent weld line appearance and high strength.

Embodiment 7

[0046] This example is basically the same as Example 2, except that Bayer's 2800 PC resin and Chimei's PA-757 ABS resin were used to prepare a PC / ABS resin with excellent weld line appearance and high strength.

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Abstract

The invention relates to PC / ABS alloy being excellent in appearance and high in strength of weld lines and a preparation method thereof. The alloy includes the following components, by weight: 50-80 parts of PC resin, 20-45 parts of ABS resin, 0.5-5 parts of a composite compatilizer, 2-5 parts of a toughening agent, 0.1-2 parts of an anti-oxidant and 0.1-2 parts of a lubricant. The composite compatilizer is a composition composed of a styrene-acrylonitrile-glycidyl methacrylate random copolymer and a peroxide-grafted styrene-acrylonitrile copolymer. Compared with the prior art, two special compatilizers, SAG and ROOR'-g-SAN, are compounded and then are added to the PC / ABS alloy, so that when two material flows are mixed, phase interface thickness of ABS is increased by means of the GMA while the phase interface thickness of PC is increased by means of the peroxide in the PC / ABS alloy due to existence of the GMA and the peroxide functional group, thereby improving the strength of the weld lines of the material. The SAN ensures excellent compatibility of PC and ABS, so that the material has excellent appearance of weld lines. Not only is total performance of the material influenced but also a product being excellent in appearance can be produced.

Description

technical field [0001] The invention relates to a PC / ABS alloy, in particular to a PC / ABS alloy with excellent weld line appearance and high strength and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] PC / ABS alloy has excellent mechanical and thermal properties, and is widely used in automobiles, home appliances, digital products and other fields. However, PC / ABS is not a homogeneous system and has a high viscosity. During the injection molding process, when multi-gate injection molding is used or there are holes, inserts, and product sizes in the cavity, the PC / ABS melt Experience the flow in more than two directions. When two melts meet, a weld line will be formed in the product. The existence of the weld line not only affects the appearance quality of the product, but also greatly affects the mechanical properties of the product. The weld line is formed during the mold filling process. In addition to eliminating t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L55/02C08L25/14C08L25/12
CPCC08L69/00C08L2205/02C08L2205/035C08L2205/08C08L55/02C08L25/14C08L25/12
Inventor 刘辉辉李强罗明华辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS
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