Optical diffusion agent for acrylic optical diffusion board and preparation method of optical diffusion board

Abstract

The invention relates to an optical diffusion agent for an acrylic optical diffusion board and a preparation method of the optical diffusion board. The acrylic optical diffusion board comprises the following components in percentage by mass: 97.0-99.5 percent of polymethyl methacrylate and 0.5-3.0 percent of the optical diffusion agent which is a random copolymer of styrene and methylacryloyl propyl phenyl polyhedral oligomeric silsesquioxanes (MAPhPOSS). After the MAPhPOSS is copolymerized with styrene, even if the using amount of styrene monomers is small, the contribution of a nanoscale inorganic core can reach the same shading coefficient and light scattering property, and organic MMA groups in the POSS can avoid phase separation due to excessive addition amount, so that the optical diffusion board is uniform in surface, phase separation stripes are avoided, and a good diffusion body is obtained. The acrylic optical diffusion board can be applied to the field of outdoor photoelectric display of outdoor lamps, advertising light boxes, billboards, light source covers and the like with light-emitting diodes (LEDs) as light sources.

Description

technical field [0001] The invention relates to a preparation method of a light diffusing agent for an acrylic light diffusing plate. Background technique [0002] With the gradual improvement of optoelectronic display technology and the continuous enhancement of people's awareness of environmental protection and low carbon, the development of optoelectronic display equipment has higher and higher requirements for the shading and energy consumption of the substrate. At the same time, since most optoelectronic display devices are used outdoors or used for a long time, the overheating phenomenon is more prominent, so the requirements for heat resistance, weather resistance and flame retardancy of the equipment are gradually increasing. [0003] As a commonly used photoelectric display material, the light diffusion plate is generally made of polycarbonate (PC), polymethyl methacrylate (PMMA, also known as acrylic), polystyrene (PS) and other polymer materials. Many light diffu...

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Problems solved by technology

Hao Yuanzeng et al [CN102219989A, a flame-retardant light-diffusing polycarbonate resin composite material for LED lamps and its preparation method] In order to improve the application range of the product, 2%-5% of organic silicon flame retardant was added to the light-diffusing plate to Improve the flame retardancy of the light diffusion plate and overcome the shortcomings of a single diffuser that is difficult to achieve a balance of haze and light transmittance through the compounding of inorganic and organic light diffusers

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