Polycarbonate combination and preparation method thereof

Abstract

The invention provides a polycarbonate combination and a preparation method thereof. In terms of 100 parts of polycarbonate materials by weight, the polycarbonate combination comprises the following components in parts by weight: 100 parts of polycarbonate, 1-10 parts of copolyester, 0.01-0.5 part of aromatic sulphosalts fire retardant, 0.05-0.35 part of organic silicon fire retardant, 0.05-5 parts of anti-dripping agent, 1-15 parts of photodiffusion agent master batches and 0.05-5 parts of antioxidant. The preparation method of the polycarbonate combination comprises the following steps: adding the components of the polycarbonate combination as required into a blender mixer, and evenly stirring and mixing; and carrying out melt mixing, extrusion and granulation on the evenly mixed raw materials in eight temperature areas of a double-screw extruder. The polycarbonate combination provided by the invention has excellent photodiffusion performance, high light transmittance, excellent flame retardant property, safety, environmental protection, favorable heat resistance, easy molding and reduced crystal point defect.

Description

technical field [0001] The invention relates to a polycarbonate composition and a preparation method thereof, in particular to a polycarbonate composition improved in terms of light diffusion, flame retardancy, transparency, moldability, product crystal point defects, and safety and environmental protection. its preparation method. Background technique [0002] Polycarbonate (PC) is a widely used engineering plastic with excellent mechanical properties, heat resistance and weather resistance, etc., and has high light transmittance. Therefore, it has been widely used in heat resistance and moisture absorption than acrylic resin. Polycarbonate with better performance is used as the matrix resin of the light diffuser plate. [0003] However, there are currently increasingly higher performance requirements for plastic materials used in light boxes, lampshades and backlight panels, especially with the development of LED technology. For example, it is required that it must have ...

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Problems solved by technology

Among them, on the one hand, organophosphorus flame retardants are easy to precipitate during injection molding and extrusion, which has a great influence on the mechanical properties and light transmittance of the product. The flammability is difficult to reach the UL94 standard V-0 level under 1.6mm, and although increasing the addition amount can further improve the flame retardancy of the material, it will also make the light transmittance drop more seriously. At the same time, due to the flame retardant and light diffusion in the finished product Inhomogeneous dispersion of the agent is prone to white spot defects

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