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Phosphorus-nitrogen halogen-free flame-retardant polycarbonate and preparation method thereof

A flame-retardant polycarbonate and polycarbonate technology, which is applied in the field of phosphorus-nitrogen halogen-free flame-retardant polycarbonate and its preparation, can solve problems such as insufficient flame retardancy of polycarbonate, and achieve excellent hydrolysis stability and thermal stability. Good properties, good processability and flame retardancy

Inactive Publication Date: 2015-06-24
QINGDAO WANLI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PC itself has a certain flame retardancy (oxygen index is 21% to 24%), but in TVs, computers, transformer coils, auto parts, building materials and other applications with high flame retardancy requirements, the resistance of polycarbonate The flammability is still insufficient, and it needs to be modified to meet the market demand

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A phosphorus-nitrogen-based halogen-free flame-retardant polycarbonate, the composition of which is: 75% polycarbonate, 8% cyanurate (MCA), surface treated with a silane coupling agent 12% glass fiber, 4% styrene-grafted maleic anhydride copolymer (SMA), 0.4% polytetrafluoroethylene powder coated with polystyrene, 0.6% PETS.

[0018] Preparation method: (1) Dry polycarbonate in a blast dryer at 110°C to 130°C for 3 to 4 hours, and dry melamine (MCA) at 80°C to 120°C for 30 to 45 minutes, ready to use; (2) Weigh the dry polycarbonate, cyanurate (MCA) and other components according to the weight ratio, add them to the high-speed mixer and stir for 5 to 30 minutes, so that Discharge after mixing evenly; (3) Put the mixture in step (2) into a twin-screw extruder, melt, knead and extrude at 240°C to 260°C, cool and granulate to obtain the finished product.

Embodiment 2

[0020] A phosphorus-nitrogen-based halogen-free flame-retardant polycarbonate, the composition of which is: 84% polycarbonate, 5% melamine polyphosphate (MPP), and the surface has been treated with an aluminum-titanium composite coupling agent. Nano-calcium carbonate 8%, acrylonitrile-styrene copolymer grafted glycidyl methacrylate (AS-g-GMA) 2%, polystyrene-coated polytetrafluoroethylene powder 0.5%, TAS-2A 0.5% .

[0021] Preparation method: (1) Dry polycarbonate in a blast dryer at 110°C to 130°C for 3 to 4 hours, and dry melamine polyphosphate (MPP) at 80°C to 120°C for 30 to 45 minutes , for use; (2) Weigh dry polycarbonate, melamine polyphosphate (MPP) and other components according to the weight ratio, add them to a high-speed mixer and stir for 5 to 30 minutes, make the mixture uniform and then produce (3) Add the mixed material in step (2) into a twin-screw extruder, melt, knead and extrude at 240°C to 260°C, cool and granulate to obtain the finished product.

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PUM

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Abstract

The invention discloses a phosphorus-nitrogen halogen-free flame-retardant polycarbonate and a preparation method thereof. The phosphorus-nitrogen halogen-free flame-retardant polycarbonate is composed of the following components in percentage by mass: 6%-85% of polycarbonate, 5-10% of phosphorus-nitrogen halogen-free flame retardant, 5-20% of enhancer, 2-5% of compatilizer, 0.1-1% of anti-dripping agent and 0.1-1.5% of lubricant. Compared with the prior art, the phosphorus-nitrogen halogen-free flame-retardant polycarbonate has the advantages of high strength, favorable heat resistance, favorable dimensional stability, favorable processability, favorable flame retardancy, favorable heat stability, favorable hydrolysis stability, favorable electric properties, low cost and the like. The oxygen index is 30 above, the vertical burning can reach Grade V-0. The phosphorus-nitrogen halogen-free flame-retardant polycarbonate can be widely used in the fields of electronic and electric appliances, automobile industry, building materials and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a phosphorus nitrogen-based halogen-free flame-retardant polycarbonate and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a non-toxic, odorless, colorless and transparent material with high light transmittance, high refractive index, excellent mechanical properties, good heat resistance, flame resistance and insulation, and its product size is stable , are widely used in machinery, electrical and electronic, medical equipment and optical lighting and other fields. PC itself has a certain flame retardancy (oxygen index is 21% to 24%), but in TVs, computers, transformer coils, auto parts, building materials and other applications with high flame retardancy requirements, the resistance of polycarbonate The flammability is still insufficient, and it needs to be modified to meet the market demand. Contents of the invention [0003] The ...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08K5/3492C08K9/04C08K9/06C08K7/14C08K3/26
CPCC08L69/00C08K2201/011C08L2201/02C08L2201/08C08L2201/22C08L2205/035
Inventor 不公告发明人
Owner QINGDAO WANLI TECH