Fumed Silica Thixotropy Agent for Printing Inks
CAS Number: 112945-52-5
Hydrophilic and hydrophobic fumed silica grades tailored for thixotropy control, anti-settling, and gloss reduction in printing inks across offset, screen, gravure, and UV systems. Fumed silica builds a strong hydrogen-bond-mediated network at rest that collapses under press shear, enabling high printability while preventing sedimentation and improving ink transparency and matting in specialty coatings and inks.
Technical Specifications
| appearance | White fluffy powder |
| moisture (%) | ≤1.5 |
| pH (4% in water) | 3.7–4.5 (hydrophilic) or N/A (hydrophobic) |
| bulk density (g/L) | 30–100 |
| BET surface area (m²/g) | 130–380 (grade dependent) |
Applications
- Thixotropy additive in screen and UV printing inks
- Anti-settling agent in gravure and offset inks
- Matting and flatting agent in specialty inks
- Rheology modifier in solvent and waterborne flexo inks
- Anti-pigment-settling additive in industrial inks
Key Features
- Rapid thixotropic recovery after press shear for consistent printability
- Hydrophobic grades for solvent and UV ink compatibility
- Effective at low loading (0.5–3%) for cost-efficient formulation
- Dual function: thixotropy and matting in one additive
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CAS Number
112945-52-5
Category
Printing Ink ChemicalsAvailability
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