High-toughness halogen-free flame-retardanting reclaimed polycarbonate compound and preparation method thereof

A technology of flame-retardant polycarbonate and polycarbonate, which is applied in the field of environment-friendly halogen-free flame-retardant polycarbonate recycled material compound and its preparation, and can solve the problems of reduced intrinsic viscosity, reduced molecular weight, and inability to meet product requirements, etc. , to achieve excellent flame retardant properties and less smoke

Inactive Publication Date: 2010-05-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polycarbonate recycled materials are degraded due to the aging effects of light, heat and oxygen in the early use and processing process, and the molecular chains are broken, resulting in a substantial decrease in molecular weight and a decrease in intrinsic viscosity, making polycarbonate recycling The mechanical properties of the material, especially the impact properties, are poor and cannot meet the product requirements. Therefore, it is necessary to toughen and other functional modifications to polycarbonate recycled materials to meet the requirements of reuse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take polycarbonate recycled materials, core-shell structure silicone rubber latex particles, compatibilizer, antioxidant, light stabilizer, ultraviolet absorber, kaolin, polytetrafluoroethylene, and mix all raw materials according to the following composition and mass percentage To blend:

[0028] Polycarbonate Recycled 81.0%

[0029] Core-shell structure silicone rubber latex particles 10.0%

[0030] Bisphenol A type solid epoxy resin 7050 7.0%

[0031] Antioxidant 1076 0.2%

[0032] Antioxidant 1010 0.2%

[0033] Light stabilizer 622 0.3%

[0034] UV absorber UL-326 0.2%

[0035] Kaolin 0.8%

[0036] PTFE 0.3%

[0037] The blend is melted, blended, extruded, cooled, and granulated through a twin-screw extruder. The screw speed is 260 rpm. ℃. Then, the obtained pellets were fully dried in a vacuum oven at 80° C., and injected into standard mechanical property test specimens and flame retardancy test specimens on an injection molding machine. The mechanical pr...

Embodiment 2

[0039] Take polycarbonate recycled materials, core-shell structure silicone rubber latex particles, compatibilizer, antioxidant, light stabilizer, ultraviolet absorber, kaolin, polytetrafluoroethylene, and mix all raw materials according to the following composition and mass percentage To blend:

[0040] Polycarbonate Recycled 87.8%

[0041] Core-shell structure silicone rubber latex particles 10.0%

[0042] Styrene-maleic anhydride copolymer 3.0%

[0043] Antioxidant 1010 0.3%

[0044] Antioxidant 168 0.2%

[0045] Light stabilizer 944 0.2%

[0046] UV absorber UL-326 0.2%

[0047] Kaolin 0.8%

[0048] PTFE 0.5%

[0049] The blend is melted, blended, extruded, cooled, and granulated through a twin-screw extruder. The screw speed is 300 rpm. ℃. Then, the obtained pellets were fully dried in a vacuum oven at 80° C., and injected into standard mechanical property test specimens and flame retardancy test specimens on an injection molding machine. The mechanical properti...

Embodiment 3

[0051] Take polycarbonate recycled materials, core-shell structure silicone rubber latex particles, compatibilizer, antioxidant, light stabilizer, ultraviolet absorber, kaolin, polytetrafluoroethylene, and mix all raw materials according to the following composition and mass percentage To blend:

[0052] Polycarbonate Recycled 87.9%

[0053] Core-shell structure silicone rubber latex particles 7.0%

[0054] Bisphenol A type solid epoxy resin 7050 3.0%

[0055] Antioxidant 1010 0.2%

[0056] Antioxidant 1076 0.1%

[0057] Light stabilizer 944 0.2%

[0058] UV absorber UL-531 0.2%

[0059] Kaolin 1.0%

[0060] PTFE 0.4%

[0061] The blend is melted, blended, extruded, cooled, and granulated through a twin-screw extruder. The screw speed is 250 rpm. ℃. Then, the obtained pellets were fully dried in a vacuum oven at 80° C., and injected into standard mechanical property test specimens and flame retardancy test specimens on an injection molding machine. The mechanical pro...

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Abstract

The invention relates to a high-toughness halogen-free flame-retardanting reclaimed polycarbonate compound and a preparation method thereof, belonging to the field of reclaimed plastic flame-retardanting and toughening-modified products. The invention aims to provide a high-toughness halogen-free flame-retardanting reclaimed polycarbonate compound which uses reclaimed polycarbonate as a matrix. The invention is characterized in that the compound comprises the following components by weight percent: 81.0-93.4% of reclaimed polycarbonate, 3.0-10.0% of latex particles of core-shell silicon rubber, 1.0-7.0% of bulking agent, 0.1-0.5% of antioxidant, 0.1-0.5% of light stabilizer, 0.1-0.5% of ultra-violet absorber, 0.8-1.2% of heat barrier and 0.3-0.5% of anti-dripping agent. The preparation method of the compound comprises the following steps: evenly mixing the components, melting the components on a double-screw extruder, blending, extruding, cooling and pelleting the melted components to prepare the reclaimed polycarbonate compound. The compound has the advantages of good anti-impact properties, retardanting level of UL94 V-0 and low cost, thereby meeting the requirements of industries such as electronic and electric products and the like on the high-property polycarbonate engineering plastics.

Description

Technical field: [0001] The invention relates to the modification (including flame retardant and toughening) technology and preparation field of plastic reclaimed materials, in particular to an environment-friendly halogen-free flame retardant polycarbonate regenerated with high toughness based on polycarbonate recycled materials Composites and methods for their preparation. The polycarbonate recycled material compound prepared by the present invention can be used in the fields of electronics, electrical appliances, machinery, automobiles, etc., and is used to manufacture casings of digital cameras, notebook computers, mobile phones, etc., switch boxes, switchboard components, relay casings, and coils. Frames, junction boxes, plugs, sockets, electrical switches and meter casings, knobs, etc. Background technique: [0002] Polycarbonate (PC for short) is an odorless, non-toxic, amorphous and highly transparent thermoplastic engineering plastic with excellent physical and mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L51/08C08L63/02C08L35/06C08L71/08
Inventor 汪晓东孙双月武德珍
Owner BEIJING UNIV OF CHEM TECH
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