Flame-retarding light-diffusing polycarbonate resin composite for LED lamp and preparation method thereof

Abstract

The invention discloses a flame-retarding light-diffusing polycarbonate resin composite for an LED (light emitting diode) lamp and a preparation method thereof, and the flame-retarding light-diffusing polycarbonate resin composite for the LED lamp comprises the following components by weight percent: 75-90% of polycarbonate resin, 5-10% of brominated polycarbonate, 2-5% of an organic-silicon flame retardant, 0.5-8% of a light-diffusing agent, 0.1-0.5% of a heat stabilizer, 0.1-0.5% of a light stabilizer and 0-1% of a processing aid. The invention adopts organic and inorganic light diffusion compound to overcome the defect that haze and light transmittance are difficult to balance by using a single diffusing agent, and the environmentally-friendly brominated polycarbonate serving as a flame retardant and the organic-silicon flame retardant are compounded to achieve minimal influence on light transmittance under the condition of high-efficiency flame retarding and broaden the application scope of LED lampshades made of light-diffusing polycarbonate resin. The LED lampshade made of the composite disclosed by the invention has the outstanding advantages of high flame retarding performance of and balanced haze and light transmittance, and ensures the security while being used in harsh environmental conditions.

Description

technical field [0001] The invention relates to a polycarbonate resin composite material, in particular to a flame-retardant light-diffusing polycarbonate resin composite material and its preparation technology. Background technique [0002] In recent years, with the continuous development of LED lighting technology, the demand for LED lampshades has been continuously increasing, which has promoted the development of the LED lampshade market, and the requirements for performance have also been continuously improved. [0003] PC (polycarbonate) is a widely used engineering plastic with high transparency, high toughness, high heat resistance, high strength and other characteristics. It has great advantages in the LED lighting lampshade industry. Patent CN1730539A discloses a light-diffusing resin composition prepared with a methacrylic resin as a matrix and a lampshade made from it. The light-diffusing agent is inorganic or organic to achieve a good balance between light diffu...

AI Technical Summary

Problems solved by technology

However, the matrix resin methacrylic used in this patent has the disadvantage of poor toughness, and this patent does not add flame retardants, which limits the scope of application of the products produced by this patent

U.S. Patent US20090258170A1 discloses a flame-retardant light-diffusing composition based on PC, adding an organic light-diffusing agent and a silicone flame retardant to achieve light-diffusing and flame-retardant properties, expanding the application range of the light-diffusing composition. However, the flame retardancy is low, only reaching V1 level, which cannot meet the needs of specific occasions

Patent CN101906244A discloses a PC-based flame-retardant light-diffusing PC composition, adding light-diffusing masterbatch, compounding flame-retardant with sulfonate and organic silicon, reaching (1.6mm) V0 flame-retardant level, but no light stability With the addition of additives, the weather resistance is not good, which limits the service life and scope of application of the product