High Refractive Index Silicone for SMD LED Encapsulation
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.
| 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.
Shenzhen SQUARE Silicone Co., Ltd.
Address:Building 9th, 3rd Phase, Hemei Industrial Park, Pingzi Road, Pingdi Block, Shenzhen, PR China 518117
Tel.:
(Overseas)
Ext:837
Fax: 86-755-28805428
