Recycling process of waste polycarbonate

A polycarbonate and waste technology, which is applied in the field of recycling process of waste polycarbonate, can solve the problems such as the large drop in mechanical properties and the inability to effectively improve the comprehensive mechanical properties of polycarbonate recycled materials, so as to improve the mechanical properties, Improve toughness and comprehensive mechanical properties, the effect of a wide range of applications

Inactive Publication Date: 2019-02-01
HEFEI LONGYANG AGRI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to reasons such as light irradiation, oxidation, and aging of recycled materials, the mechanical properties of recycled materials are greatly reduced, and the process of the present invention cannot effectively improve the comprehensive mechanical properties of polycarbonate recycled materials.

Method used

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  • Recycling process of waste polycarbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A recycling process for waste polycarbonate, comprising the following steps:

[0032] (1) The waste polycarbonate is crushed by a crusher until the particle size is less than 5 mm, and placed in an ultrasonic cleaning machine for cleaning for 15 minutes to obtain waste polycarbonate particles;

[0033] (2) Place the waste polycarbonate pellets in an oven at 80 degrees Celsius, after drying for 5 hours, add them to a twin-screw extruder for melt extrusion, cool and pelletize, and obtain polycarbonate pellets;

[0034] (3) Add maleic anhydride and triallyl cyanurate to acetone to dissolve, add polycarbonate and initiator to a high-speed mixer, mix for 20 minutes at 50 degrees Celsius, and add twin-screw extrusion Machine melting, cooling and pelletizing, the pellets were washed 3 times with deionized water, placed in an oven at 80 degrees Celsius, and dried for 15 hours to obtain modified polycarbonate pellets;

[0035] The mass ratio of maleic anhydride, triallyl cyanur...

Embodiment 2

[0047] A recycling process for waste polycarbonate, comprising the following steps:

[0048] (1) The waste polycarbonate is crushed by a crusher until the particle size is less than 5 mm, and placed in an ultrasonic cleaning machine for cleaning for 20 minutes to obtain waste polycarbonate particles;

[0049] (2) Place the waste polycarbonate granules in an oven at 90 degrees Celsius, after drying for 5 hours, add them to a twin-screw extruder for melt extrusion, cool and pelletize, and obtain polycarbonate granules;

[0050] (3) Add maleic anhydride and triallyl cyanurate to acetone to dissolve, add polycarbonate and initiator to a high-speed mixer, mix for 25 minutes at 55 degrees Celsius, and add twin-screw extrusion Machine melting, cooling and pelletizing, the pellets were washed 3 times with deionized water, placed in an oven at 90 degrees Celsius, and dried for 15 hours to obtain modified polycarbonate pellets;

[0051] The mass ratio of maleic anhydride, triallyl cyan...

Embodiment 3

[0063] A recycling process for waste polycarbonate, comprising the following steps:

[0064] (1) The waste polycarbonate is crushed by a crusher until the particle size is less than 5 mm, and placed in an ultrasonic cleaning machine for cleaning for 18 minutes to obtain waste polycarbonate particles;

[0065] (2) Place the waste polycarbonate pellets in an oven at 84 degrees Celsius, after drying for 5 hours, add them to a twin-screw extruder for melt extrusion, cool and pelletize, and obtain polycarbonate pellets;

[0066] (3) Add maleic anhydride and triallyl cyanurate to acetone to dissolve, add polycarbonate and initiator to a high-speed mixer, mix for 24 minutes at 53 degrees Celsius, and add twin-screw extrusion Machine melting, cooling and pelletizing, the pellets were washed 3 times with deionized water, placed in an oven at 86 degrees Celsius, and dried for 15 hours to obtain modified polycarbonate pellets;

[0067] The mass ratio of maleic anhydride, triallyl cyanur...

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Abstract

The invention discloses a recycling process of waste polycarbonate, and relates to the field of polycarbonate recycling. The recycling process comprises the following steps: (1) pulverization and cleaning of waste polycarbonate; (2) primary melt processing and extrusion of polycarbonate; (3) secondary melt processing and extrusion of polycarbonate; (4) third melt processing and extrusion of polycarbonate; and (5) injection molding. Through multiple melt processing and extrusion and with the synergistic effect of additives, toughness of comprehensive mechanical properties of the reclaimed materials can be effectively enhanced, and the processed polycarbonate recycled materials have good flame retardancy and mechanical properties and have a wide application range.

Description

technical field [0001] The invention relates to the field of polycarbonate recycling, in particular to a recycling process for waste polycarbonate. Background technique [0002] Polycarbonate is a thermoplastic engineering plastic with large demand, wide application and superior comprehensive performance. It has excellent toughness, excellent electrical insulation, wide application range and stable product size. It is a kind of comprehensive performance. engineering plastics. Widely used in various industries such as automobile manufacturing, medical equipment, aerospace, packaging, electronic appliances, optical lenses, etc. With the rapid development of my country's polyester industry, the production and demand of PC materials are increasing day by day. At the same time, the amount of waste polycarbonate materials produced is also increasing. Although these waste polycarbonate materials themselves are not very toxic, due to their bulky size and difficulty in degrading un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L51/04C08L33/10C08L23/08C08L9/06C08K3/34C08K5/098C08K5/526C08K5/03C08K5/523C08K3/22
CPCC08L69/00C08L2201/02C08L2201/08C08L51/04C08K3/34C08K5/098C08K5/526C08K5/03C08K5/523C08K3/2279C08L33/10C08L23/0815C08L9/06
Inventor 沈涛
Owner HEFEI LONGYANG AGRI TECH CO LTD
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