Silico® EF9409 – Epoxypropoxypropyl -Terminated PDMS
Silico® EF9409 (CAS NO: 102782-97-8) is a reactive epoxy-functional PDMS with epoxy groups at both ends. It offers high reactivity, good compatibility, and performs well in textiles, coatings, adhesives, and electronics.
Product Description
Silico® EF9409 (CAS NO: 102782-97-8) is a reactive epoxy-functional polydimethylsiloxane (PDMS) modified with epoxypropoxypropyl groups at both chain ends. This specialized silicone fluid offers excellent compatibility, high reactivity, and superior performance in textile finishing, coatings, adhesives, and electronics encapsulation.
Its unique bifunctional structure provides a combination of flexibility, chemical reactivity, and softness, making it an ideal ingredient in reactive systems requiring durable bonding or surface treatment.
Technical Specifications
| Property | Value |
|---|---|
| Appearance | Colorless, transparent liquid |
| Active Ingredient | 100% silicone fluid |
| CAS Number | 102782-97-8 |
| Density @ 25°C | 1.05–1.12 g/cm³ |
| Refractive Index @ 25°C | 1.410–1.440 |
| Functionality | Terminal epoxy groups (–CH(O)CH₂) |
| Solubility | Insoluble in water |
| Shelf Life | 12 months in unopened container |
Product Grades and Specifications
| Grade | Molecular Weight | Viscosity @25°C | Epoxy Content (eq/100g) |
|---|---|---|---|
| EF9409-6000 | ~6,000 | 140–160 cSt | 0.030–0.033 |
| EF9409-8000 | ~8,000 | 200–220 cSt | 0.023–0.026 |
| EF9409-11000 | ~11,000 | 300–340 cSt | 0.017–0.019 |
| EF9409-13000 | ~13,000 | 370–420 cSt | 0.014–0.017 |
| EF9409-15000 | ~15,000 | 480–510 cSt | 0.012–0.015 |
- Note: As viscosity and molecular weight increase, the epoxy equivalent per 100g typically decreases, indicating reduced reactivity per unit mass but increased mechanical durability.
Key Features & Benefits
Terminal epoxy functionality for high reactivity
Excellent adhesion to substrates such as textiles, plastics, glass, and metals
Imparts softness, durability, and chemical resistance
Compatible with organic and silicone-based resins
Enhances mechanical and electrical insulation properties
Recommended Applications
Textile Finishes – Acts as a reactive silicone softener, delivering permanent softness and wash durability.
Epoxy & Silicone Adhesives – Enhances flexibility, thermal stability, and bonding strength.
Electronics Encapsulation – Used in formulating reactive intermediates for potting and encapsulation of electronic components.
UV/EB Curable Systems – Functions as a reactive diluent or crosslinking agent.
Packaging & Storage
| Details | Description |
|---|---|
| Packaging | Available in 5kg, 25kg or 200kg PE drums or coated iron drums. |
| Storage | Store in a cool, dry, well-ventilated area at ambient temperature. Avoid contact with acids and bases. Shelf life: 12 months in unopened containers. |
| Transportation | Non-hazardous; handle as general chemicals. |
Disclaimer
All technical data provided is based on current knowledge and experience. Users must test product suitability for intended applications.
No warranties are expressed or implied. Silico® assumes no liability for incidental or consequential damages.
Jessica G.
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