Halogen-free low-warpage low-linear-expansion-coefficient extrusion-grade thin-wall flame-retardant polycarbonate composite material and preparation method thereof

Abstract

The invention relates to the field of polycarbonate resin composite materials, and discloses a halogen-free low-warpage low-linear-expansion-coefficient extrusion-grade thin-wall flame-retardant polycarbonate composite material and a preparation method thereof. The halogen-free low-warpage low-linear-expansion-coefficient extrusion-grade thin-wall flame-retardant polycarbonate material is prepared from the following components in percentage by mass: 25.9 to 46.5 percent of PC (polycarbonate) resin, 2 to 4 percent of PET (Polyethylene terephthalate) resin, 8 to 12 percent of a flame retardant, 1 to 1.5 percent of a flexibilizer A, 1.5 to 3 percent of a flexibilizer B, 12 to 16 percent of a mineral filler, 25 to 30 percent of glass fibers, 0.2 to 0.5 percent of an anti-dripping agent, 0.1 to 0.3 percent of a main antioxidant, 0.1 to 0.3 percent of an auxiliary antioxidant, 0.1 to 0.5 percent of a lubricant, 0.5 to 1 percent of a dispersing agent and 3 to 5 percent of a black seed. The linear expansion coefficient of the material can be reduced, warpage deformation of the material can be prevented, meanwhile, the problems of thin-wall flame retardance and toughness balance of the material are solved, the preparation method is simple in process and high in efficiency, the production cost can be greatly saved, and industrial production is easy.

Description

technical field [0001] The invention relates to the technical field of polycarbonate resin composite materials, in particular to a halogen-free low-warpage low-linear expansion coefficient extrusion-grade thin-wall flame-retardant polycarbonate composite material and a preparation method thereof. Background technique [0002] PC resin, that is, polycarbonate resin, in addition to its excellent mechanical properties, electrical properties, transparency, and dimensional stability, it also has good heat resistance (glass transition temperature is 150 ° C, heat distortion temperature is 135 ℃). Therefore, PC resin is widely used in home appliances, charger casings or other electronic and electrical accessories. [0003] Most of the traditional TV back cover is made of ABS material or PC / ABS material. The heat resistance of these two materials is limited. In the case of large-scale TVs with high heat generation, the linear expansion coefficient is high and the dimensional stabil...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a halogen-free low warpage low linear expansion coefficient extrusion-grade thin-walled flame-retardant polycarbonate composite material and its preparation method, which can reduce the linear expansion of the material The coefficient can prevent warping and deformation of the material, and at the same time solve the problem of thin-walled flame retardancy and toughness balance of the material, and the preparation method is simple and efficient, which can greatly save production costs

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