Name: Low-BET Silica Matting Agent FP-244
Brand: Coatingsink
SKU: silica-matting-low-bet-fp244
Availability: InStock

Question 1

Why would a formulator choose a low-BET silica matting agent over a high-BET grade?

Accepted Answer

Low-BET grades (150–180 m²/g) have lower oil absorption, which causes less viscosity increase in the wet paint and allows higher loadings before rheology becomes problematic. They are preferred in high-build industrial topcoats and thick-film architectural finishes where maintaining application viscosity and reducing film defects matters more than achieving ultra-fine matte surfaces.

Question 2

How does the 10 µm D50 particle size influence the final coating surface?

Accepted Answer

The larger mean particle size creates a coarser micro-texture at the film surface, which increases diffuse light scattering and produces a deep matte or flat appearance. It also acts as a micro-filler, improving scratch and burnish resistance. However, in thin films (<25 µm DFT) particle protrusion may cause haze or slight roughness — in such cases, a finer 4–5 µm grade is preferable.

Question 3

What is the recommended dispersion protocol for FP-244 in waterborne systems?

Accepted Answer

Add FP-244 slowly to the aqueous grind phase under medium-speed agitation (Cowles or dissolver at 1000–1500 rpm). Avoid high-shear milling, which can break down particle aggregates and shift the particle size distribution, altering the target gloss level. A wetting dispersant at 0.3–0.5% on silica weight improves homogeneity and storage stability.

Oil Absorption	~200 g/100 g
pH (5% slurry)	6.5–8.5
BET Surface Area	150–180 m²/g
Moisture Content	≤5%
D50 Particle Size	~10 µm

Low-BET Silica Matting Agent FP-244

Specifications

FAQ

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