Polycarbonate (PC)/acrylonitrile-butadiene-styrene (ABS) waste material modification and recovery formula

A technology for modifying secondary materials, which is applied in the field of PC/ABS secondary material modification and recovery formula, which can solve problems such as pollution, molding equipment and mold corrosion, and environmental hazards

Inactive Publication Date: 2012-05-23
SUZHOU MITAC PRECISION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Disposal by incineration or landfill, but this method is not only uneconomical but also causes environmental pollution, such as incineration will produce harmful gases such as sulfur dioxide, which is the main cause of acid rain
However, the landfill method of PC / ABS is not easy to degrade, which also causes great harm to the environment.
[0005] (2) Simple recovery and granulation of PC / ABS secondary materials without any modification, downgraded to ordinary plastics, although it is better than the first method, it still fails to fully utilize the value of PC / ABS
[0006] (3) Modification and recycling of PC / ABS secondary materials are often used in the industry. When recycling PC / ABS, acid anhydride reactive coupling agents are added to improve mechanical properties, but this can only be applied to mechanical properties and precision of materials. In occasions with low requirements, and after adding acid anhydride, it will corrode the molding equipment and molds and reduce the service life of the equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Take PC / ABS secondary material, polymethyl methacrylate, flame retardant, toughening agent, processing aid and toner according to the following composition formula:

[0053] PC / ABS secondary material 70%

[0054] Polymethylmethacrylate 10%

[0055] Bisphenol A bis-diphenyl phosphate 13%

[0056] Methyl Methacrylate-Butadiene-Styrene Terpolymer 6%

[0057] Ethylene bis stearamide 0.2%

[0058] Antioxidant 0.3%

[0059] Anti-dripping agent 0.3%

[0060] Carbon black 0.2%.

[0061] Add 70% PC / ABS secondary material and 10% polymethyl methacrylate to a high-speed mixer for high-speed premixing for 5 minutes, then add 13% bisphenol A bis-diphenyl phosphate, 6% formazan Methyl acrylate-butadiene-styrene terpolymer and other processing aids and toners are melt-extruded and granulated with a twin-screw extruder, and the main barrel of the twin-screw extruder is from the feeding port to the machine head The control temperature of each section of the outlet is 120°C, 235°C...

Embodiment 2

[0065] Take PC / ABS secondary material, polymethyl methacrylate, flame retardant, toughening agent, processing aid and toner according to the following composition formula:

[0066] PC / ABS secondary material 77%

[0067] Polymethylmethacrylate 8%

[0068] Bisphenol A bis-diphenyl phosphate 10%

[0069] Methyl Methacrylate-Butadiene-Styrene Terpolymer 4%

[0070] Ethylene bis stearamide 0.2%

[0071] Antioxidant 0.3%

[0072] Anti-dripping agent 0.3%

[0073] Carbon black 0.2%.

[0074] Add 77% PC / ABS secondary material and 8% polymethyl methacrylate to a high-speed mixer for high-speed pre-mixing for 5 minutes, then add 10% bisphenol A bis-diphenyl phosphate, 4% formazan Methyl acrylate-butadiene-styrene terpolymer and other processing aids and toners are melt-extruded and granulated with a twin-screw extruder, and the main barrel of the twin-screw extruder is from the feeding port to the machine head The control temperature of each section of the outlet is 120°C, 235°C,...

Embodiment 3

[0078] Take PC / ABS secondary material, polymethyl methacrylate, flame retardant, toughening agent, processing aid and toner according to the following composition formula:

[0079] PC / ABS secondary material 81%

[0080] Polymethylmethacrylate 6%

[0081] Bisphenol A bis-diphenyl phosphate 8%

[0082] Methyl Methacrylate-Butadiene-Styrene Terpolymer 4%

[0083] Ethylene bis stearamide 0.2%

[0084] Antioxidant 0.3%

[0085] Anti-dripping agent 0.3%

[0086] Carbon black 0.2%.

[0087] Add 81% PC / ABS secondary material and 6% polymethyl methacrylate to a high-speed mixer for high-speed pre-mixing for 5 minutes, then add 8% bisphenol A bis-diphenyl phosphate, 4% formazan Methyl acrylate-butadiene-styrene terpolymer and other processing aids and toners are melt-extruded and granulated with a twin-screw extruder, and the main barrel of the twin-screw extruder is from the feeding port to the machine head The control temperature of each section of the outlet is 120°C, 235°C, 2...

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PUM

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Abstract

The invention discloses a polycarbonate (PC) / acrylonitrile-butadiene-styrene (ABS) waste material modification and recovery formula. The PC / ABS waste material modification and recovery formula comprises: by weight, 70 to 85% of a PC / ABS waste material, 5 to 10% of polymethyl methacrylate, 4 to 15% of a fire retardant, 4 to 10% of a flexibilizer, 1 to 3% of auxiliary processing agents and 1 to 2% of toner. The PC / ABS waste material modification and recovery formula has the advantages that pencil hardness, mechanical properties and fireproof properties of a PC / ABS waste material modified according to the PC / ABS waste material modification and recovery formula are the same as or similar to those of raw materials; environmental regulation requirements are satisfied; and in an economic aspect, PC / ABS waste material recycle is realized.

Description

【Technical field】 [0001] The invention relates to a PC / ABS alloy, in particular to a PC / ABS secondary material modified recovery formula. 【Background technique】 [0002] PC / ABS (polycarbonate and acrylonitrile-butadiene-styrene copolymer) alloy has the comprehensive characteristics of both PC and ABS, with easy processing, high rigidity, high impact toughness and excellent mechanical properties and thermal stability , so PC / ABS alloys are widely used in computers, commercial machine casings, electrical equipment, etc. [0003] However, the extensive use of PC / ABS alloys inevitably produces a large number of defective materials, such as nozzle materials, scrapped defective products, etc. At present, the industry's processing methods for PC / ABS secondary materials mainly include the following: [0004] (1) Disposal by incineration or landfill, but this method is not only uneconomical but also causes environmental pollution. For example, incineration will produce harmful gase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L55/02C08L33/12C08L51/00C08L53/02C08L23/00C08K13/02C08K5/523C08K5/20C08K3/04
Inventor 徐陈孝朱付成
Owner SUZHOU MITAC PRECISION TECH
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