High-efficiency flame-retardant polycarbonate material and preparation method thereof

Abstract

The invention relates to a polycarbonate material, a high-efficiency flame-retardant polycarbonate material and a preparation method thereof. The high-efficiency flame-retardant polycarbonate materialis prepared from the following raw materials in parts by mass: 100 parts of PC resin, 0.02-0.2 part of a sulfonate flame retardant, and 1-9 parts of filling mineral powder; PDMS, mineral powder and stannous chloride are uniformly mixed in proportion and heated to 90-120 DEG C; stirring is kept, a reaction is conducted for 4 h, and filtering, washing and drying are conducted after the reaction isfinished to obtain the filling mineral powder; the preparation method comprises the following steps: weighing the PC resin, the sulfonate flame retardant, the filling mineral powder and other raw materials in parts by mass, adding the weighed materials into a high-speed mixer, and uniformly stirring and mixing to obtain a mixed material A; putting the mixed material A into a twin-screw extruder with a screw length-diameter ratio of 32-36 to be subjected to extruding and granulating to obtain the high-efficiency flame-retardant polycarbonate material, and the flame-retardant polycarbonate material is economical in cost and has good flame-retardant properties, thermal deformation temperature and mechanical properties.

Description

technical field [0001] The invention relates to polycarbonate materials, in particular to a high-efficiency flame-retardant polycarbonate material and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is a comprehensive engineering plastic with excellent mechanical properties, high transparency, outstanding weather resistance and high temperature resistance, good dimensional stability and electrical insulation, and is widely used Used in electrical and electronic, automotive interior and optical media fields. PC itself has a certain flame retardancy, which can usually reach the UL94V2 level, but it is not enough to meet the requirements for the use of materials in the electrical, electronic and automotive fields. Therefore, the existing PCs in the electrical, electronic and automotive fields are all modified by adding flame retardants. , Improve the flame retardant performance of PC. [0003] At present, the flame retardants used in PC mainly i...

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Problems solved by technology

[0004] Among them, brominated flame retardants have high flame retardant efficiency. After being applied to PC, the performance loss of the flame retardant PC obtained is small, but because the halogen contained will pollute the environment, the application of brominated flame retardants has been restricted.

[0005] Flame-retardant PC modified by phosphorus-based flame retardants has good flame-retardant properties, and excellent color and transparency, but the heat distortion temperature and impact strength decrease

[0006] The flame retardant PC modified by sulfonate flame retardants, due to the high flame retardant efficiency of sulfonate flame retardants, can significantly improve the flame retardant performance of PC by adding a small amount, and the physical and mechanical properties of the obtained flame retardant PC The performance is comparable to that of general-purpose PC, but the price of sulfonate flame retardants is relatively expensive, resulting in high cost

[0007] Silicon-based flame retardants and inorganic flame retardants are added in large amounts when used, which has a great impact on PC performance

Silicon-based flame retardants are mainly composed of organic silicon, which has a high cost and affects the welding and encapsulation effect of flame-retardant PC. The impact strength, tensile strength and bending strength of the obtained flame-retardant PC are all reduced.

The toughness and transparency of flame-retardant PC modified by inorganic flame retardants are significantly reduced

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