high heat resistant additional type silicone rubber for LED encapsulation use
Introductions :
Due to the energy saver, best brightness and higher powder LEDs was applied on very field, as general illumination backlight for LCD, and Automotive light. In encapsulation epoxy resin can not stand heat cycle on applications，RAY-8626 is high heat resistant additional type silicone rubber
A new product Silicone rubber ,which had heat and weather resistant ,could be apply on electric circles and LEDs used.
Uncured properties :
RAY-8626A
viscosity : 2500 cps
special gravity : 0.98 ± 0.02
appearance : transparency
RAY-8626B
viscosity : 3000
special gravity : 0.98 ± 0.02
appearance : transparency
Properties after cured :
Volume resistivity : > 1.0 x 1015 ohm-cm
Dielectric strength : > 20 Kv/mm
Color : colorless
refraction : 1.407
Transmittance (1mm) : 95% /(200nm-800nm)
Shore : 18 (ShoreA)
Operation process :
weight : Take RAY-8626A and RAY-8626B by 10:1
(weight ratio).
Defoaming : place the mixture in vacuum vessel，kept
vacuum lower than 500 mg Hg.
Filler : Be careful pouring silicone to the container, avoid occur bubble
Harden : Preheating(60℃X 15 min then 80℃X 30 min). then Curing 150℃X 40 min.
