Hydrophobic Agent
CAS Number: 556-67-2
A polydimethylsiloxane (PDMS)-based hydrophobic agent that imparts strong water-repellency to organic and inorganic substrates through formation of a durable silicone monolayer. The agent achieves water contact angles exceeding 100° on treated surfaces, effectively preventing moisture absorption, staining, and corrosion. It is suitable for use in waterborne, solvent-borne, and UV-cure coating formulations.
Technical Specifications
| pH | 6.5–8.0 |
| purity | ≥98% |
| appearance | Clear to translucent viscous liquid |
Applications
- Exterior architectural and facade coatings
- Textile and fiber hydrophobic finishing
- Paper and packaging moisture barrier coatings
- Electronic component conformal coatings
- Mineral substrate and stone impregnation
Key Features
- Water contact angle >100° for superior hydrophobicity
- Excellent compatibility with silicone, acrylic, and epoxy binders
- Thermally stable up to 200 °C
- Non-yellowing and UV-stable for exterior applications