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PC/PBT alloy and method for producing the same

A technology of alloy and polycarbonate, which is applied in the field of PC/PBT alloy and its preparation, can solve the problem of less research on alloy halogen-free flame retardancy, achieve good optical performance, improve flame retardancy, and low cost

Inactive Publication Date: 2009-08-19
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In some existing literatures on PC / PET alloys, most of them are on its toughening mechanism, and there are relatively few studies on the direction of halogen-free flame retardancy of alloys.

Method used

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  • PC/PBT alloy and method for producing the same
  • PC/PBT alloy and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The weight ratio of PC is 79% (the following are weight ratios), PBT 15.1%, 1010 / 1680.2 / 0.2%, flame retardant PX-2204%, compatibilizer 1%, other 0.5%. The mixed material is put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated to form a composite material. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 250°C; zone 2: 255°C; zone 3: 255°C; zone 4: 250°C; head: 245°C; residence time 2 to 3 minutes. The pressure is 15MPa.

Embodiment 2

[0034] The weight ratio of PC is 77% (the following are weight ratios), PBT 14.6%, 1010 / 1680.2 / 0.2%, flame retardant PX-2206%, compatibilizer 1.5%, and other 0.5%. The mixed material is put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated to form a composite material. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 250°C; zone 2: 255°C; zone 3: 255°C; zone 4: 250°C; head: 245°C; residence time 2 to 3 minutes. The pressure is 15MPa.

Embodiment 3

[0036] The weight ratio of PC is 76.6% (the following are weight ratios), PBT 13%, 1010 / 1680.2 / 0.2%, flame retardant PX-2208%, compatibilizer 1.5%, and other 0.5%. The mixed material is put into the hopper of the twin-screw extruder, melted and blended, extruded and granulated to form a composite material. Among them, the temperature settings of each heating zone of the screw are: zone 1 temperature: 250°C; zone 2: 255°C; zone 3: 255°C; zone 4: 250°C; head: 245°C; residence time 2 to 3 minutes. The pressure is 15MPa.

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PUM

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Abstract

The invention discloses a PC / PBT alloy and a preparation method thereof. The PC / PBT alloy comprises the components with the weight percentage as follows: 65-87 percent of polycarbonate, 5-20 percent of polyethylene glycol terephthalate, 3-10 percent of flame retardant, 1-3 percent of toughening compatilizer, 0.2-0.6 percent of antioxidant and 0.1-2.5 percent of other promoter. In the PC / PBT alloy prepared by the invention, halogen-free environmental protective flame retardant is used, thereby improving the flame retardant resistance and keeping high toughness and good optical performance at the same time. The PC / PBT alloy provided by the invention has simple preparation technology and low cost.

Description

[technical field] [0001] The invention relates to the technical field of polymer materials, in particular to a PC / PBT alloy and a preparation method thereof. [Background technique] [0002] Polycarbonate (PC) has excellent performance, has tough and rigid mechanical properties, and its unnotched impact strength ranks first among engineering plastics. Continuous use, good electrical insulation and dimensional stability. However, PC has high melt viscosity, poor fluidity, solvent resistance, wear resistance, and low notched impact strength. Polybutylene terephthalate (PBT) is a thermoplastic engineering plastic with a fast crystallization rate. It has excellent solvent resistance, good melt flow and excellent processability. The main chains of PC and PBT both contain benzene rings and ester groups, and their chemical structures are similar; therefore, they have good compatibility and can be blended in any proportion. The resulting alloy has good heat resistance, good impact ...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L75/04C08K5/134C08K5/526B29B9/00B29C47/92C08L67/02B29C48/40B29C48/92
CPCB29C48/92B29C48/04B29C48/40B29C2948/92514B29C2948/92561B29C2948/92895
Inventor 徐东贺永赵青华
Owner SHENZHEN KEJU NEW MATERIAL
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