The Dow Corning potting technology support higher transmittance, provide a strong impetus for the development of the LED Market

The newly developed 3 Dow Corning dual component high refractive index (two-part HRI) silicone sealant for new products, to support the rapid growth of light emitting diode (LED) market. It is reported that the new Dow Corning sealant provides higher transmittance and suitable for various applications for high temperature, hardness, chemical corrosion resistance and ultraviolet irradiation of excellence is better than others on the market of LED sealant.

According to market research firm Strategies Unlimited, with LED in the lighting market and gradually expand the application root to the car, mobile phone, portable computer and LCD TV backlighting system and other products, the global LED sales growth in the next three years will be more than 60%, and in 2010 reached $8 billion; and because the silicone sealant can improve the efficiency and the durability of components, so it can drive the LED market growth.

Most LED are covered with a protective potting compound to avoid electrical and environmental damage, while increasing the light output and minimizing the heat accumulation. In addition, potting can be molded into a lens sheet, sealant are mostly made of epoxy resin and other organic materials, because of their hardness, transparency and low cost compared with the application requirements.

But with the development of power electronics industry high brightness LED bigger, silicone sealant are becoming increasingly popular, because the silicone encapsulant not only can withstand the operating temperature of LED is far more than the epoxy resin, but also compatible with lead-free reflow soldering process, but also provides high transparency, excellent adhesion, low hygroscopic material and a variety of different hardness and stickiness.

Dow Corning's new two-component high refractive index sealant with a total of 3 formulations, each of them has its most suitable applications and processes. OE-6665 A/B provides Dow Corning maximum hardness and low viscosity, OE-6630 A/B provides a soft dowcorning formula and similar low viscosity, while the OE-6635 A/B is also providing Dow Corning soft ingredients, but the viscosity is doubled. 3 products have a high degree of transparency, refractive index of 1.53; in contrast, the market for other silicone sealant products refractive index is only about 1.4.

Global marketing manager for Billy Han and LED light source management products Dow Corning said: "the new potting products in addition to provide the light output than the existing products, but also have the inherent silicone heat resistance and durability. Dow Corning believes LED potting glue has great potential for growth, we are very pleased to be able to develop more stable and heat-resistant new materials to help drive market growth. "

Source: automotive electronics design