EF 9343 Side-Chain Epoxy-Modified Silicone Fluid
Silico® EF-9343 Side-Chain Epoxy-Modified Silicone Fluids are PDMS-based polymers with epoxy groups on their side chains. These reactive sites enhance bonding, flexibility, and crosslinking. Ideal for coatings, adhesives, textiles, and electronics requiring strong adhesion and durability.
Product Description
Silico® EF-9343 Side-Chain Epoxy-Modified Silicone Fluids are a class of advanced reactive silicone polymers featuring epoxy functional groups grafted onto the side chains of a polydimethylsiloxane (PDMS) backbone. Unlike traditional terminal epoxy silicones, these side-chain modifications enable multiple reactive sites along the polymer, significantly enhancing crosslinking potential, substrate interaction, and formulation flexibility.
These silicone fluids are ideal for applications requiring strong adhesion, weatherability, chemical resistance, and mechanical durability — making them a preferred choice in high-performance coatings, adhesives, textile finishing, and electronics.
Technical Specifications
| Parameter | Typical Values |
|---|---|
| INCI Name | Epoxy Dimethicone / Epoxy-Functional Polydimethylsiloxane |
| CAS Number | Varies by structure (commonly used ranges: 68952-47-4, 70131-67-8) |
| Functional Group | Glycidyl ether or cycloaliphatic epoxy (pendant groups) |
| Appearance | Transparent to light-yellow liquid |
| Viscosity @ 25°C | 50 – 2,000 cSt (grade dependent) |
| Epoxy Content | 0.1 – 1.5 meq/g |
| Refractive Index (25°C) | 1.400 – 1.420 |
| Density @ 25°C | 0.97 – 1.00 g/cm³ |
| Functional Group eq. wt | 350 g/mol – 525 g/mol |
| Active Silicone Content | 100% |
| Solubility | Soluble in hydrocarbons, esters, ketones |
| Shelf Life | 12 months (sealed, dry, room temperature) |
Key Performance Features
Multiple Reactive Sites: Pendant epoxy groups increase crosslink density and curing efficiency
Superior Flexibility: Maintains elasticity while enhancing chemical resistance
Excellent Substrate Adhesion: Bonds effectively to glass, metal, textiles, and plastics
Thermal & UV Stability: Suitable for outdoor and high-temperature applications
Low VOC Compatibility: Ideal for UV/EB-curable and solvent-free systems
Customization Ready: Molecular weight, epoxy content, and viscosity can be tailored for specific applications
Recommended Applications
| Industry | Application |
|---|---|
| Coatings & Paints | Adhesion promoter, reactive diluent, weatherable topcoats |
| Textile Finishing | Durable softeners and reactive silicone softening agents |
| Adhesives & Sealants | Improves bonding strength, flexibility, and environmental resistance |
| Electronics | Thermal encapsulants, flexible potting compounds |
| UV/EB Curable Systems | Crosslinking agent in radiation-cured coatings and inks |
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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