Precipitated Silica for Adhesives and Sealants
CAS Number: 112926-00-8
Precipitated silica is a synthetic amorphous silicon dioxide produced by wet chemical precipitation, used as a reinforcing filler, thickener, and matting agent in adhesives and sealants. It provides cost-effective viscosity and thixotropy control, improves cohesive strength, and reduces gloss in silicone, polyurethane, and polysulfide sealants. Compared to fumed silica, precipitated grades offer higher pore volume and lower cost, making them suitable for high-fill adhesive and sealant formulations.
Technical Specifications
| moisture | ≤6% |
| appearance | White powder |
| BET surface area | 120–200 m²/g |
| pH (5% suspension) | 6.0–8.0 |
| averageParticleSize | 3–20 µm |
Applications
- Reinforcing filler in silicone sealants
- Thickener in polysulfide and polyurethane sealants
- Matting agent in adhesive coatings
- Anti-settling agent in liquid adhesives
- Filler in shoe sole and rubber adhesive compounds
Key Features
- Cost-effective reinforcement and thixotropy
- Good oil absorption for balanced viscosity control
- Reduces gloss in adhesive and sealant surfaces
- High pore volume for efficient filler loading
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CAS Number
112926-00-8
Category
Adhesive / Sealant AdditivesAvailability
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