High Refractive Index Silicone for SMD LED Encapsulation Manufacturer

High Refractive Index Silicone for SMD LED Encapsulation

$High Refractive Index Silicone for SMD LED Encapsulation$

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Model No.
SR2530-A/B

Product Features
High refractive index
High optical transparency
Low air and water permeability
Excellent resistance to heat, cold and UV
Perfect adhesion to substrates such as metal, PPA, ceramics, etc.

Main Applications
The high refractive index silicone is ideal for encapsulation of SMD LEDs.

Typical Properties

Before curing	Physical properties	SR2530A	SR2530B
	Appearance	Colorless and transparent	Colorless and transparent
	Refractive index( 25°C )	1.54	1.54
	Density (g/ cm)	1.15	1.15
	Viscosity( 25°C )mPa·s	12000	2500
	Mixing ratio	1	2
	Viscosity after mixing( 25°C )mPa·s	5000
	Operable time( 25°C )	8 hours
After curing	SHORE hardness	50
	Refractive index( 25°C )	1.54
	Tensile strength ( Mpa )	2.8
	Elongation (%)	0.6
	Light transmittance (450 nm, 1 mm)	0.94
	Glass transition temperature( Tg , ℃ )	12.5
	Coefficient of linear expansion( α1 )	70ppm
	Coefficient of linear expansion( α2 )	220ppm
	Shrinkage after curing	about 3%

Notes:
1) Curing condition is recommended to be first cure 100℃ x1 hours post cure 150℃ x3hours
2) The encapsulation silicone should be stored at room temperature in an indoor dry and ventilated place without direct sunlight. Shelf life of this encapsulation material is 12 month.
3) Viscosity is measured by NDJ-79 rotary viscosimeter.
4) Above table is only for reference use. Contact us detailed molding process.