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Highly dispersible precipitated silica with optimized particle size distribution for enhanced color development.
Low abrasivity, minimizing wear on processing equipment during pigment dispersion and compounding.
Excellent surface compatibility with organic pigments and polymeric binders in solvent- and water-based systems.
Consistent batch-to-batch performance ensured by Solvay’s stringent quality control and ISO-certified manufacturing.
Non-hazardous, REACH-compliant formulation supporting sustainable industrial formulations.
Automotive coatings requiring high-gloss, color fidelity, and long-term weather resistance.
Industrial maintenance paints for corrosion protection and UV-stable color retention.
Architectural coatings including interior/exterior acrylic emulsions and elastomeric wall finishes.
Plastic color concentrates for polyolefins and engineering thermoplastics.
Inkjet ink formulations where rheology control and pigment stabilization are critical.
| Chemical Type | Precipitated amorphous silica |
| Product Form | Free-flowing white powder |
| Appearance | White, odorless, non-crystalline powder |
| Primary Applications | Pigment extender and rheology modifier in coatings, inks, and plastics |
| Key Features | High surface area, low oil absorption, pH-neutral aqueous slurry stability |
| Benefits | Improved pigment dispersion, reduced settling, enhanced film uniformity |
| Regulatory Status | REACH registered; compliant with EU Directive 2009/48/EC (toys) and FDA 21 CFR §173.375 (indirect food contact) |
| Storage Conditions | Store in dry, well-ventilated area at 5–30 °C; protect from moisture and contamination |
Q1: What is the primary function of Solvay ZEOSIL 175 Pigment in polymer systems?
A: Solvay ZEOSIL 175 Pigment is a high-purity, surface-modified silica-based pigment designed primarily to provide controlled opacity, improved dispersion stability, and enhanced rheological behavior in thermoplastic and thermoset polymer matrices — without significantly compromising mechanical integrity or processability.
Q2: How does Solvay ZEOSIL 175 differ from conventional fumed or precipitated silicas used as fillers?
A: Unlike standard silica fillers, ZEOSIL 175 features a tailored surface chemistry optimized for pigment functionality rather than reinforcement. It offers superior compatibility with organic binders and resins, reduced agglomeration tendency, and more consistent optical performance — making it especially suitable for applications where visual uniformity and low haze are critical.
Q3: Is Solvay ZEOSIL 175 compatible with food-contact or medical-grade polymers?
A: Solvay ZEOSIL 175 is manufactured under strict quality control and is suitable for use in polymers intended for indirect food contact and non-implantable medical devices, subject to final formulation validation. Regulatory compliance depends on the full system composition and end-use conditions — users should conduct appropriate safety and migration assessments per applicable regional requirements.
Q4: What processing methods are recommended for optimal dispersion of ZEOSIL 175 in polymer melts?
A: For best results, incorporate ZEOSIL 175 during compounding using high-shear melt mixing (e.g., twin-screw extrusion). Pre-blending with carrier resin or masterbatch dilution is recommended to ensure homogeneous distribution. Avoid prolonged residence at elevated temperatures beyond standard processing windows for the base polymer.
Q5: Can ZEOSIL 175 be used in UV-curable coatings or inks?
A: Yes — ZEOSIL 175 demonstrates good compatibility with many UV-curable acrylate and epoxy-based systems. Its low volatility and thermal stability support efficient dispersion and minimal interference with photoinitiator activity, though formulation-specific testing is advised to confirm cure speed, gloss retention, and film clarity.
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