CYS-101 Carboxy-Terminated Silicone Fluid
CYS-101 Carboxy-Terminated Silicone Fluid (CAS 851486-70-9) is a high-performance carboxy-terminated PDMS from Silico®. With reactive end groups, it offers good compatibility, water resistance, and crosslinking ability, making it suitable for leather, textiles, polymers, coatings, and surface treatments.
Product Introduction:
CYS-101 Carboxy-Terminated Silicone Fluid (CAS 851486-70-9) is a highly reactive carboxy-functional silicone Fluid featuring carboxyl-terminated polydimethylsiloxane (PDMS) chains. Manufactured by Silico®, this specialty silicone fluid is engineered for advanced surface modification, polymer enhancement, and hydrophobic treatment across multiple industries including leather processing, textile finishing, polymer blending, and surface coating.
Technical Specifications
| Attribute | Description / Typical Value |
|---|---|
| INCI Name | Carboxy-terminated polydimethylsiloxane |
| CAS Number | 851486-70-9 |
| Chemical Structure | –COOH terminated PDMS polymer chain |
| Functional Group | Carboxyl (–COOH) |
| Equivalent Products | Comparable to Dowsilâ„¢ BY 16-750 or similar |
| Appearance | Transparent to slightly hazy, pale yellow viscous liquid |
| Viscosity @ 25°C | 500 – 2,000 cSt (adjustable upon request) |
| Density @ 25°C | Approx. 0.98 g/cm³ |
| Refractive Index @ 25°C | 1.410 – 1.420 |
| Carboxy Content | Customizable based on application needs |
| Solubility | Soluble in alcohols; emulsifiable in water |
| Thermal & Chemical Stability | Stable under acid, alkali, and shear conditions; non-yellowing |
Key Benefits & Performance Features
Reactive Carboxyl Terminals
Offers excellent reactivity for chemical grafting, crosslinking, and chain extension in polyester and polyamide formulations.Enhanced Water Repellency
Significantly improves hydrophobicity in chrome-tanned leather and other natural substrates.Surface Modification
Provides smoothness, anti-stick, anti-blocking, and abrasion resistance in coatings, rubbers, and plastics.Compatibility with Organic Systems
Enhances the dispersion of pigments, fillers, and additives in thermoplastics and organic matrices.Stable Under Harsh Conditions
Acid- and alkali-resistant; remains stable under high shear and does not yellow over time.Emulsifiable in Aqueous Systems
Easily formulated into water-based emulsions for textile or leather softening applications.
Common Industrial Applications
| Sector | Use Case Description |
|---|---|
| Leather Treatment | Increases water repellency and stain resistance in leather finishing |
| Textile Finishing | Imparts softness, hydrophilicity, and anti-static properties |
| Polymer Modification | Acts as a chain extender or crosslinker for polyamide, PET, TPU, or PU systems |
| Pigment/Filler Surface Treatment | Improves wetting, dispersion, and bonding with organic phases |
| Industrial Coatings | Improves scratch resistance, slip, and surface durability |
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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