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Method for preparing conductive plastics taking recovered plastics as matrix

A technology for conducting plastics and recycling plastics, applied in the field of polymer material processing, can solve problems such as the decline of mechanical properties and toughness, and achieve the effects of easy processing and molding, cost saving, and good dispersion effect.

Inactive Publication Date: 2010-12-08
江苏英纳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the content of conductive particles such as carbon black increases to a critical value, the resistivity of the composite system drops suddenly, but the mechanical properties, especially the toughness, also drop sharply at the same time.

Method used

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  • Method for preparing conductive plastics taking recovered plastics as matrix
  • Method for preparing conductive plastics taking recovered plastics as matrix
  • Method for preparing conductive plastics taking recovered plastics as matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 25Kg of recovered PP particles, 4Kg of conductive carbon black, 1Kg of dispersant (3# white oil, molecular weight 250-450, flash point 90°C), 0.15Kg of tetrabutyl orthotitanate (titanate coupling agent), antioxidant Agent 1680.1Kg; recovered PP particles were vacuum dried at 107°C for 2 hours, and carbon black was vacuum dried at 105°C for 5 hours;

[0031] Put the conductive carbon black into the high-speed mixer, then use the atomizer to atomize the titanate coupling agent and dispersing oil into the high-speed mixer, stir at 100°C at high speed; mix for 15 minutes; under the condition of high-speed stirring Add recycled PP particles and stir at high speed for 10 minutes to mix evenly, and then extrude, granulate, and inject the mixed materials through a twin-screw extruder. The dispersant can be recycled after devolatilization.

[0032] The TSE-65D co-rotating twin-screw extruder is used for granulation. The temperature of the first zone of the twin-screw extru...

Embodiment 2

[0036] Take 26Kg of recovered PE particles, 3Kg of conductive carbon black, 1Kg of dispersant (3# white oil, molecular weight 250-450, flash point 90°C), 0.15Kg of quaternary ammonium titanate (titanate coupling agent), antioxidant Agent 10100.1Kg; recovered PP was vacuum dried at 107°C for 2 hours, conductive carbon black was vacuum dried at 105°C for 5 hours;

[0037] Put the conductive carbon black into the high-speed mixer, then use the atomizer to atomize the titanate coupling agent and dispersing oil into the high-speed mixer, stir at 100°C at high speed; mix for 20 minutes; under the condition of high-speed stirring Then add recycled PE particles and stir at high speed for 10 minutes to mix evenly, and then extrude, granulate, and inject the mixed materials through a twin-screw extruder. The dispersant can be recycled after devolatilization.

[0038]TSE-65D co-rotating twin-screw extruder is used for granulation. The temperature of the first zone of the twin-screw extr...

Embodiment 3

[0042] Take 10.8Kg of recovered PE particles, 16.2Kg of recovered PP particles, 2.4Kg of conductive carbon black, 0.6Kg of dispersant (polyethylene wax with a molecular weight of 1000-4000), 0.1Kg of tetraisopropyl titanate (titanate coupling agent) Kg, each 0.05Kg of antioxidant 168 and antioxidant 1010; the recovered PE and PP particles were dried in vacuum at 100°C for 2 hours, and the conductive carbon black was dried in vacuum at 105°C for 5 hours;

[0043] Put the conductive carbon black into the high-speed mixer, and then use an atomizer to atomize the titanate coupling agent and dispersing oil into the high-speed mixer, stir at 100°C at high speed; mix for 30 minutes; under the condition of high-speed stirring Add recycled PE particles at the bottom, stir at high speed for 15 minutes to mix evenly, and extrude, granulate and inject the mixed materials through a twin-screw extruder.

[0044] The TSE-65D co-rotating twin-screw extruder is used for granulation. The temper...

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Abstract

The invention relates to the field of high polymer material processing, and discloses a method for preparing conductive plastics taking recovered plastics as a matrix. The technical scheme is that: the conductive plastics consist of the following raw materials in percentage by weight: 80 to 90 percent of plastic matrix, 7 to 18 percent of conductive carbon black, 1.5 to 5 percent of dispersing agent and 0.2 to 1 percent of coupling agent; and the preparation method comprises the following steps of: (1) atomizing the coupling agent and the dispersing agent, uniformly mixing with the conductive carbon black at the temperature of between 80 and 110 DEG C to obtain processed carbon black; and (2) with high speed stirring, uniformly mixing the processed carbon black and the plastic matrix, extruding and granulating, wherein the plastic matrix is one or a mixture of more than two of recovered polyethylene glycol terephthalate, polycarbonate, polyethylene and polypropylene. Through the method, the conductive plastics with easy machine-shaping and good dispersing effect are obtained; and the recovered plastics maintain the mechanical properties of the universal engineering plastics and the waste non-conductive plastics are endowed with better conductivity.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and relates to the preparation of conductive plastics from recycled plastics modified by carbon black, in particular to environment-friendly conductive plastics based on recycled ethylene glycol phthalate, polycarbonate, polyethylene or polypropylene and its preparation method. Background technique [0002] In recent years, China's plastic consumption has maintained a double-digit growth rate. By 2000, the world's total plastic output had exceeded 110 million tons, and the annual growth rate continued to increase by about 8%. In 2005, my country's demand for plastic products reached 2500 tons. A large number of plastic products facilitate the production and life of human beings. At the same time, more and more polymer waste will be produced. The number of discarded polymer materials in the world has reached 40 million tons, causing serious "white pollution" problems. In my country, abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/06B29C47/92C08L67/02C08L69/00C08L23/06C08L23/12C08K13/02C08K3/04B29C48/92
CPCB29C48/04B29C48/92B29C2948/92514B29C2948/92704B29C2948/92904
Inventor 吴驰飞张玥许海燕张靓
Owner 江苏英纳新材料有限公司
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