Dow Corning three new LED sealant provides high transmittance

Dow Corning published 3 two-component high refractive index (two-part HRI) silicon sealing glue new product DOW CORNING OE-6665 A/B, DOW CORNING OE-6630 A/B and DOW CORNING OE-6635 A/B, the rapid growth of the LED market to support. The new sealing glue provides higher light transmittance, and is suitable for various applications of hardness, with higher temperature, chemical corrosion and ultraviolet radiation resistance.

The new two-component high refractive index sealant has 3 formulations, each having its own use and process. DOW CORNING OE-6665 A/B to provide maximum hardness and low viscosity, DOW CORNING OE-6630 A/B provides a soft formula and similar low viscosity, and the DOW CORNING OE-6635 A/B is also provided with soft ingredients, but the viscosity is increased by 1 times. 3 products have high transparency, refractive index of 1.53.

Dow Corning pointed out that the majority of LED are covered with a protective seal to avoid electrical and environmental damage, while improving the light output and heat accumulated to a minimum. In addition, sealing glue can molded into lens sheet, so as to produce the light intensity distribution of a specific model. Before the sealing glue are mostly made of epoxy resin and other organic materials, but the silicon sealant starts becoming more and more popular, because the LED can withstand higher operating temperature, and compatible with lead-free reflow process, but also provides a high transmittance, material adhesion, low hygroscopicity, and different hardness and viscous.

Source: Electronic Engineering album