Silico® HF2050 Trimethylsilyl-Terminated Silicone Fluid
Silico® HF2050 is a trimethylsilyl-terminated methylhydrosiloxane-dimethylsiloxane copolymer (CAS 68037-59-2) with reactive Si-H groups. It’s used as a crosslinker in addition-cure systems like RTV-2 silicones, encapsulants, and elastomers, offering good stability and compatibility.
Product Overview
Silico® HF2050 is a trimethylsilyl-terminated methylhydrosiloxane-dimethylsiloxane copolymer (CAS No. 68037-59-2). It is a reactive silicone fluid featuring active Si-H (silicon-hydrogen) functionality, designed for use in platinum-catalyzed addition-curing systems. With tunable viscosity and hydrogen content, it acts as a highly effective crosslinking agent in RTV-2 silicones, electronic encapsulants, and silicone elastomers. The trimethylsilyl termination offers enhanced stability and compatibility with a variety of silicone matrices.
Technical Specifications
| Property | Value / Range |
|---|---|
| CAS Number | 68037-59-2 |
| Appearance | Clear to light yellow liquid |
| Chemical Structure | Trimethylsilyl-terminated methylhydrosiloxane-dimethylsiloxane copolymer |
| Si–H Content (mmol/g) | Customizable (e.g., 5.5 mmol/g) |
| Viscosity @ 25°C | 12–100,000 cSt (grade-dependent) |
| Specific Gravity @ 25°C | 0.980–0.990 |
| Refractive Index @ 25°C | 1.4010–1.4050 |
| Volatile Content (150°C/3h) | ≤1.0% |
Applications
RTV Silicone Crosslinker
Enables efficient curing in addition-cure systems through hydrosilylation with vinyl-functional silicones.Intermediate for Silicone Modification
Reacts with olefin-containing compounds to produce customized organo-functional silicones.Surface Treatment Agent
Imparts hydrophobic or oleophobic properties to inorganic fillers and substrates.Encapsulation & Electronics
Used in potting and sealing formulations for electronic components requiring high thermal and chemical stability.
Packaging
5 kg plastic pail
25 kg plastic pail
200 kg steel drum
Custom packaging available on request
Storage & Handling Guidelines
Store in a dry, cool, and well-ventilated area below 30°C.
Keep tightly sealed in original containers to prevent contamination and moisture absorption.
Avoid contact with strong oxidizing agents, acids, and alkalis.
Product is moisture-sensitive; use with proper precautions.
Shelf Life: 12 months in unopened packaging under recommended conditions.
Safety & Regulatory Information
Non-hazardous under standard transport regulations
Refer to the Safety Data Sheet (SDS) before use
Use personal protective equipment when handling
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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