UL94-5VA-grade high-performance flame-retardant reinforced PC (polycarbonate)/ABS (acrylonitrile butadiene styrene) blend and preparation method thereof

A high-performance, blending technology, applied in the field of polymer materials, can solve the problems of polymers that are difficult to achieve, rarely reported, and low in heat resistance, and achieve the effects of reduced loss, low combustion smoke, and high heat resistance.

Active Publication Date: 2014-04-23
CHONGQNG PRET NEW MATERIAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the conventional flame-retardant PC / ABS materials can meet the requirements of UL94-V0. For example, CN103073864 provides a halogen-free flame-retardant polycarbonate composition, which has the characteristics of UL94-V0 flame-retardant grade, low smoke, and halogen-free. , the glass fiber reinforced flame retardant PC composition provided by CN101759977, the addition of glass fiber reinforcement helps to improve its rigidity, but it is difficult to further improve the flame retardant level to UL94-5V level, especially UL94-5VA level, which requires testing The contact surface between the sample and the flame must be free of perforation after repeated flame applications, which is difficult to achieve for polymers with relatively low heat resistance
As a lightweight, high-strength reinforcement, carbon fiber material also has excellent heat resistance, and its mechanical properties can even remain unchanged at a high temperature of 1500 ° C. Adding carbon fiber to the flame-retardant PC / ABS alloy material, It can significantly improve its anti-distortion and anti-deformation capabilities in flames, thereby further improving the flame-retardant grade of PC / ABS materials, but related research has been rarely reported

Method used

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  • UL94-5VA-grade high-performance flame-retardant reinforced PC (polycarbonate)/ABS (acrylonitrile butadiene styrene) blend and preparation method thereof
  • UL94-5VA-grade high-performance flame-retardant reinforced PC (polycarbonate)/ABS (acrylonitrile butadiene styrene) blend and preparation method thereof
  • UL94-5VA-grade high-performance flame-retardant reinforced PC (polycarbonate)/ABS (acrylonitrile butadiene styrene) blend and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative example 1～3

[0031] Weigh each component according to the percentages of the corresponding Examples 1-4 and Comparative Examples 1-3 in Table 1, put the carbon fiber in the side feeding bin of the twin-screw extruder, and mix the rest of the components evenly and put them into the twin-screw extruder. The main feeding bin for screw extrusion, the screw diameter is 35 mm, the length-to-diameter ratio L / D=36, the speed of the main engine is 400 rpm, and the temperature of each section of the main barrel (from the feeding port to the exit of the machine head) is 215 ° C, 220 ° C ℃, 225℃, 230℃, 230℃, 230℃, the product can be obtained after melt extrusion, granulation, drying and other processes. Standard test specimens were prepared by injection molding machine for tensile, bending, thermal deformation, flame retardancy and other properties.

[0032] Table 1

[0033]

[0034] It can be seen from Table 1 that the flame retardant system for conventional PC / ABS blend materials, whether it is ...

Embodiment 5～8 and comparative example 4

[0036] Weigh each component according to the corresponding percentages of Examples 5-8 and Comparative Example 4 in Table 2, place the carbon fiber in the side feeding bin of the twin-screw extruder, and mix the remaining components evenly before putting them into the twin-screw extruder. Out of the main feeding bin, the diameter of the screw is 35 mm, the length-to-diameter ratio L / D=36, the speed of the main machine is 400 rpm, and the temperature control of each section of the main machine barrel (from the feeding port to the outlet of the machine head) is 215 ° C, 220 ° C, 225°C, 230°C, 230°C, 230°C, the product is obtained after melt extrusion, granulation, drying and other processes. Standard test specimens were prepared by injection molding machine for tensile, bending, thermal deformation, flame retardancy and other properties.

[0037] Table 2

[0038]

[0039]

[0040] It can be seen from Table 2 that the content of carbon fiber has a direct impact on the flam...

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Abstract

The invention discloses a UL94-5VA-grade high-performance flame-retardant reinforced PC (polycarbonate)/ABS (acrylonitrile butadiene styrene) blend and a preparation method thereof. The UL94-5VA-grade high-performance flame-retardant reinforced PC/ABS blend comprises the following raw materials in percentage by weight: 50-80% of PC, 10-30% of ABS, 5-10% of flame retardant and 5-20% of carbon fiber. The blend has multiple properties of high strength, high heat resistance, high flame retardance, low combustion smoking amount and the like. The obtained flame-retardant reinforced PC/ABS blend can not only meet the basic UL94V-0 requirements, but also achieve various indexes of UL94-5VA under the relatively low thickness of 2.0mm of a sample piece, the sample piece has no distortion and no perforation under multiple actions of flame and keeps the relatively complete appearance and shape, and the property has an important role for preventing fire and reducing loss against key electronic parts of automobiles, engineering machines and household electrical products.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a UL94-5VA grade high-performance flame-retardant reinforced polycarbonate (PC) / acrylonitrile-butadiene-styrene (ABS) blend material and a preparation method thereof. Background technique [0002] PC / ABS blended material can fully display the characteristics of each component in the material because of its good interphase compatibility. Among them, PC endows the composite material with excellent heat resistance, impact resistance and chemical resistance, while ABS It can significantly reduce the melt viscosity of the material, so that the composite material has good processing fluidity, so it can be widely used in many fields such as automobile interior and exterior decoration, construction machinery, communication equipment, home appliances and lighting equipment. [0003] Flame retardant PC / ABS material is a new material that has been improved in order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L55/02C08L63/00C08K13/04C08K7/06C08K3/04C08K5/03B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/875B29C48/92B29C2948/9259B29C2948/92676B29C2948/92704B29C2948/92866B29C2948/92885B29C2948/92895
Inventor 郑云龙陈永东张祥福周文
Owner CHONGQNG PRET NEW MATERIAL
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