Mercaptopropyl-Terminated Polydimethylsiloxane
Mercaptopropyl-Terminated Polydimethylsiloxane is a reactive silicone polymer characterized by terminal mercapto (–SH) groups. It exhibits excellent chemical reactivity and versatility, making it widely used in various industrial applications including coatings, adhesives, sealants, personal care formulations, and electronics.
Technical Specifications
| Property | Specification |
|---|---|
| Chemical Name | Mercaptopropyl-Terminated Polydimethylsiloxane |
| CAS Number | 308072-58-4 |
| Molecular Weight | Approximately 10,000 g/mol |
| Appearance | Pale yellow to yellow viscous liquid |
| Density | ~0.97 g/mL |
| Viscosity | 80–120 cSt at 25°C |
| Flash Point | >110°C |
| Boiling Point | >205°C |
| Melting Point | <–60°C |
| Packaging | Typically supplied under nitrogen atmosphere |
Key Features and Benefits
Reactive Terminal Groups: The mercaptopropyl end groups facilitate strong chemical bonding, improving compatibility and adhesion with metals, glass, and polymers.
Viscosity Range: Moderate viscosity (80–120 cSt) ensures ease of processing and formulation flexibility.
Thermal Stability: High flash and boiling points ensure safe use in high-temperature environments.
Versatility: Suitable for use in diverse industries due to its multifunctional reactive sites.
Application Areas
Coatings & Adhesives: Enhances adhesion and durability by acting as a coupling agent between silicone and various substrates.
Sealants & Silicone Elastomers: Improves mechanical strength and environmental resistance.
Personal Care Products: Functions as a conditioning agent providing smoothness and improved texture in hair and skin care formulations.
Microelectronics: Utilized in surface modification and functionalization processes to enhance device performance.
Handling & Safety
Storage: Store in a cool, dry place away from direct sunlight and heat sources. Packaging under nitrogen helps maintain product stability.
Safety Precautions: Use appropriate personal protective equipment (PPE) and follow safety data sheet (SDS) guidelines to avoid exposure risks.
Intended Use: Primarily for research and industrial applications; verify regulatory compliance before commercial use.
Packaging Options:
We offer flexible packaging for both R&D and bulk industrial use:
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1 kg & 5 kg HDPE bottles (sample/lab-scale)
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25 kg pails & 200 kg drums (industrial production)
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1000 kg IBC totes available on request
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Custom viscosity grades and formulations available under Silico® brand lines
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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