Precipitated Silica FAQ: Expert Answers on Coating Silica Applications
Silica Matting Agent & Anti-Settling Agent FAQ for Coatings
Expert answers to the most important questions about silica matting agents and anti-settling agents for wood, industrial, UV-cured, and marine coatings. Compare CensilMatt 3651C CensilMatt 8120 and CensilGuard M-100 with industry benchmarks from leading manufacturers.
Product Comparison Table
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| Parameter | CensilMatt 3651C | CensilMatt 8120 | CensilGuard M-100 | ACEMATT OK 5201 |
|---|---|---|---|---|
| Type | Precipitated silica, untreated | Precipitated silica, wax-treated | Hydrophobic modified silica | Precipitated silica, wax-treated |
| Primary Function | Matting agent | Matting agent | Anti-settling / anti-corrosion | Matting agent |
| BET Surface Area (m²/g) | ~290 | ~230 | ~220 | 220 |
| Particle Size D50 (µm) | 5–7 | 7–9 | N/A (fumed-type) | 6.5 |
| SiO² Content (%) | ≥99 | ≥98 | ≥99.5 | ≥98 |
| Surface Treatment | None (untreated) | Organic (wax) | Hydrophobic (HMDS-type) | Organic (wax) |
| Carbon Content (%) | ~4.5 | ~3.5 | 4.5 | |
| Oil Absorption (DBP) | 2.4–2.8 cm³/g | 2.6–3.0 cm³/g | — | 300 mL/100g |
| pH (5% suspension) | 6.0–8.0 | 6.0–7.5 | 5.5–7.0 | 6.0 |
| Loss on Drying (105°C) | ≤5.0% | ≤6.0% | ≤0.5% | ≤6.0% |
| Matting Efficiency | High | High | N/A | High |
| Film Transparency | Excellent | Good | N/A | High |
| Settling Resistance | Good | Excellent | Excellent | Very good |
| Corrosion Protection | — | — | Excellent | — |
| Best For | Wood coatings, UV systems | Industrial, pigmented systems | Marine, anti-corrosion primers | General-purpose |
| Recommended Dosage | 2–5 wt% | 3–7 wt% | 0.5–2.0 wt% | 1.5–7.0 wt% |
| Price Level | Competitive | Competitive | Competitive | Premium |
1 ACEMATT OK 520 data from Evonik Industries published technical data sheet. Mentioned for comparison purposes only.
Application Suitability Matrix
| Application | CensilMatt 3651C | CensilMatt 8120 | CensilGuard M-100 |
|---|---|---|---|
| Wood coatings (clear) | ★ Best choice | Suitable | — |
| Wood coatings (pigmented) | Suitable | ★ Best choice | — |
| UV-cured coatings | ★ Best choice | Suitable | — |
| Industrial coatings (solvent-borne) | Suitable | ★ Best choice | Suitable |
| Industrial coatings (water-borne) | ★ Best choice | Suitable | Suitable |
| Coil & can coatings | — | ★ Best choice | Suitable |
| Marine primers (zinc-rich) | — | — | ★ Best choice |
| Anti-corrosion coatings | — | — | ★ Best choice |
| Ship & offshore coatings | — | Suitable | ★ Best choice |
| Leather coatings | ★ Best choice | Suitable | — |
Frequently Asked Questions
How does a silica matting agent reduce gloss in coatings?
What is the difference between precipitated silica and fumed silica as matting agents?
How does CensilMatt 3651C compare to wax-treated matting agents like ACEMATT OK 520?
When should I choose CensilMatt 8120 over CensilMatt 3651C?
What is an anti-settling agent and how does CensilGuard M-100 work in coatings?
Why is hydrophobic silica preferred as an anti-settling agent in marine and anti-corrosion coatings?
What is the recommended dosage for silica matting agents and anti-settling agents in different coating systems?
Can silica matting agents be used in UV-cured coating systems?
How do surface treatments on silica matting agents affect coating performance?
What factors should I consider when selecting a matting agent for wood coatings?
Product Selection Summary
| Coating System | Primary Need | Recommended Product | Dosage |
|---|---|---|---|
| Clear wood coatings (2K PU, NC) | Transparency + fine matte | CensilMatt 3651C | 2–5 wt% |
| UV-cured wood/panel | No cure inhibition + matte | CensilMatt 3651C | 2–5 wt% |
| Pigmented industrial coatings | Settling resistance + matte | CensilMatt 8120 | 3–7 wt% |
| Coil & can coatings | Robust matting + stability | CensilMatt 8120 | 4–7 wt% |
| Marine primers (zinc-rich) | Anti-settling + anti-corrosion | CensilGuard M-100 | 1–2 wt% |
| Epoxy protective coatings | Anti-sag + corrosion protection | CensilGuard M-100 | 0.5–1.5 wt% |
| Ship & offshore topcoats | Matting + anti-corrosion | CensilMatt 8120 + CensilGuard M-100 | Combined use |
Get Technical Support & Free Samples
Ready to optimize your coating formulation with CensilMatt matting agents or CensilGuard anti-settling agents? Our technical team provides free samples (up to 500 g), formulation guidance, and side-by-side comparison testing with your current supplier.
Contact Sensil Coating — sales@sensilcoating.com | Phone: +1（619）6093350