LED has the advantages of energy saving, high efficiency and environmental protection. As a new generation of green lighting source, it is gradually replacing the traditional lighting source and is widely used in various industries. However, with the improvement of LED brightness, power and luminous efficiency, higher requirements are proposed for the transmittance, refractive index and aging resistance of the packaging materials. The traditional epoxy encapsulated materials are resistant to ultraviolet light and heat aging, which can not meet the requirements of high-power LED packaging materials. Organic silicon packaging materials have high refractive light, high transmittance, excellent uv resistance and aging resistance. It is an ideal encapsulation material for high power LED, and has become a research hotspot of packaging materials at home and abroad.

 

 

At present domestic to high quality LED the little of the organic silicon encapsulating materials, high quality materials mainly by foreign companies dow corning, Wallace figure and letter the company monopoly, expensive, production is limited by foreign patents. So the self-developed high refraction and high transparency, excellent thermal aging and ultraviolet aging resistance of silicone materials and realize industrialization, development and large-scale production of high-power LED and promotion has extraordinary significance.

 

 

At present, the preparation technology of domestic methyl phenyl ring siloxane ring body, methyl phenyl ring siloxane price is higher, needed by the catalytic polymerization reaction temperature is higher, large energy consumption, are limiting its wide range of applications. However, methyl phenyl alkyl silane has a wide range of sources, and the price is reduced accordingly, and the reaction conditions are relatively mild, easy to operate and easy to control. So choose methyl benzene alkoxy silane as raw material, base polymer was synthesized by polycondensation and crosslinking agent, high refractive index high-power LED encapsulation liquid silicone rubber new preparation way is of great significance.

2018-04-24