High transparency, yellowing resistance.
SM-ER-51 Resin
High transparency, yellowing resistance.
Product Description：
SM-ER-51 is a tetrafunctional silicone-modified alicyclic epoxy resin. It offers high transparency, excellent yellowing resistance, and high reactivity for cationic and anhydride curing systems, making it ideal for advanced optical and encapsulation applications.
CAS NO. 2095-03-6
Classic Applications:
LED encapsulation and optical clear coatings.
UV-curable systems
3D printing resins.
Modifier for standard epoxies to improve weatherability.
Typical Properties
| Property | Value |
| Appearance | Clear, colorless to pale yellow liquid |
| Epoxy Value, eq/100g | 0.46~0.54 |
| Viscosity @ 25±1°C (mPa·s) | 2,000 – 4,500 |
| Refractive Index (nD20) | 1.475~1.495 |
| Non-volatile Matter (%) | ≥98% |