Silicone resin RAY-8152 for LED ,IC Encapsulating 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. Old plastic lens can not stand heat cycle on LEDs applications，A new product Silicone resin ,which had heat and weather resistant ,could be apply on optical used.
Uncured properties :
RAY8152-A
viscosity 2000 cps
special gravity 1.01
appearance transparency
RAY8152-B
viscosity 1500 cps
special gravity 1.01
appearance transparency
Properties after cured :
Volume resistivity > 1.0 x 1015 ohm-cm
Dielectric strength > 20 Kv/mm
Dielectric constant(60Hz) 3.8
Color colorless
refraction 1.413
Transmittance% 88% /450nm
Shore 60 (ShoreD)
Lost on heat < 0.1%
Shrinkage 0.1%
Thermal coefficint 0.32 w/m-K
Operation process :
weight Take RAY8152- A and RAY8152- B by 10:1 (weight ratio).
Defoaming place the mixture in vacuum vessel，kept vacuum lower than 100 mg Hg.
Filler Be careful pouring silicone to the container, avoid Occur bubble
Harden Preheating 100℃X 50 min. then Curing 150℃X 150 min.
