A kind of preparation method of light diffusing agent for acrylic light diffusing plate

A technology of light diffusing plate and light diffusing agent, which is applied in the direction of diffusing elements, etc., can solve the problem of difficult to achieve the balance of haze and light transmittance, and achieve the effects of easy processing, good flame retardancy and good weather resistance.

CN103193914BActive Publication Date: 2016-01-20XIAMEN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-01-20

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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.
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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...

Examples

Embodiment Construction

[0031] The objects, advantages and features of the present invention will be explained by the following non-limiting description of preferred embodiments. These embodiments are only typical examples of applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

[0032] 1. Preparation of Light Diffuser

[0033] Add 3g of PVA1788 dispersant and 400ml of deionized water into the reactor, mechanically stir and dissolve at 50°C, keep warm for 20min, add 80ml of monomer mixture solution dissolved with 1.5g of initiator BPO, raise the temperature to 75°C, keep warm for 4h, then every 5 ℃ for 2 hours, until the temperature reached 95 ℃ for 2 hours, stop the reaction, repeat the steps of suction filtration, hot water washing, suction filtration, etc., and finally vacuum dry the sample at 60 ℃ for 12 hours to obtain light diffusi...