Name: Zinc Pyrithione 48% Dispersion
Brand: Coatingsink
SKU: zinc-pyrithione-48pct-dispersion
Availability: InStock

Question 1

Can zinc pyrithione dispersion be used in both waterborne and solvent-borne coatings?

Accepted Answer

The 48% aqueous dispersion is primarily designed for waterborne systems. It can be incorporated into solvent-borne paints by first mixing with a small amount of water or compatible surfactant to prevent agglomeration, but compatibility should be verified by test. For solvent-borne antifouling systems, dry zinc pyrithione powder or a solvent-borne concentrate is generally preferred for better dispersion stability.

Question 2

Why does zinc pyrithione have dual BPR approval for PT06 and PT21?

Accepted Answer

Zinc pyrithione (ZPT) is effective both as a dry-film preservative (BPR PT06 — preservatives for paints, films and coatings) and as an antifouling active substance (BPR PT21 — antifouling products for marine use). As PT06, it is used in interior and exterior paints to prevent mold and algae growth on dried surfaces. As PT21, it is used in marine antifouling coatings to prevent the settlement of barnacles, mussels, and algae on ship hulls.

pH	6–8
Appearance	white to cream dispersion
Active Content	48±2%
Particle Size (d50)	<5 µm
Recommended loading (dry film)	0.3–1.5%

Zinc Pyrithione 48% Dispersion

Specifications

FAQ

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