CuPT Biocide JSYA-CUPT CAS 14915-37-8, Copper Pyrithione for Ship Antifouling Paint & Outdoor Coating
JSYA-CUPT CuPT Biocide is a finely powdered copper complex of pyrithione, registered under CAS 14915-37-8, supplied as a functional booster biocide for two connected coating markets: marine ship antifouling paint and exterior outdoor coating. As a secondary active in copper-based antifouling paints, it widens the biocidal spectrum of conventional cuprous oxide formulations. While cuprous oxide mainly targets hard-shelled fouling, copper pyrithione focuses on soft fouling pressure such as green a
Product Details
The active CuPT molecule combines a copper center with two pyrithione ligands. When exposed to seawater or humid air on the coating surface, controlled partial release of copper ions and pyrithione ligands takes place at the film-water interface. Pyrithione functions as an ionophore, carrying copper across cell membranes into fouling organisms; the accumulated copper then interferes with metal-dependent enzymes, respiratory metabolism and redox balance, producing oxidative stress that stops organism attachment and reproduction. For outdoor coatings, copper-pyrithione residues stay locked inside the paint film and become active only against fungi contacting the cured surface, preserving film appearance over repeated wet-dry weather cycles.
JSYA-CUPT is a yellow-brown to olive green fine powder with particle sizes adapted for paint dispersion. It can be incorporated during the grinding stage of solvent-based marine paints, SPC self-polishing binders, epoxy or polyurethane outdoor topcoats, as well as water-based exterior coating systems formulated for dry-film protection. The powder shows good thermal and UV stability during production and outdoor exposure, without rapid photodegradation. It is normally used at a fraction of total biocide loading alongside cuprous oxide, zinc-based fungicides or other approved booster actives. Storage requirements include cool, dry, shaded conditions, sealed drums, separation from strong oxidizers, and avoidance of direct contact with unsuitable metal packaging.
Main advantages:
- Dual-function CuPT active for ship antifouling paint and exterior outdoor coating
- Strong soft-fouling control against algae, diatoms, slime, biofilm and marine fungi
- Works synergistically with cuprous oxide to build a complete antifouling package
- Helps reduce gaps in copper-only paints where algae and fungi remain active
- Fine powder that disperses evenly into marine and architectural paint binders
- UV-resistant chemistry, retaining activity on long-exposure exterior surfaces
- Dry-film anti-mold and anti-mildew protection for cured outdoor coatings
- Compatible with common antifouling and exterior coating formulation routes
- TBT-free active direction, REACH and TSCA compliant for coating export markets
Typical applications:
- Cargo vessel, pleasure craft and workboat antifouling paint booster biocide
- Self-polishing copolymer and ablative marine antifouling coating formulations
- Copper-oxide based antifouling paint broad-spectrum biocide packages
- Exterior wall paint, facade coating and roof coating mold resistance
- Outdoor metal and wood protective finish antifungal modification
- Sealants, elastomeric coatings and construction finishes exposed to damp conditions
- Humid-climate decorative and protective exterior coating preservation
Product Summary
JSYA-CUPT copper pyrithione gives paint formulators a flexible, proven active that strengthens marine antifouling performance while solving outdoor mold and mildew preservation in one chemistry. Marine coating producers use it to extend antifouling service intervals and keep hull surfaces free of soft fouling, while architectural coating manufacturers rely on it to maintain clean, stain-free exterior films under demanding weather exposure. Proper formulation, compatible packaging and compliant dosing allow customers to build stable, high-performance antifouling and exterior protective coatings for global markets.
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CuPT Biocide JSYA-CUPT CAS 14915-37-8, Copper Pyrithione for Ship Antifouling Paint & Outdoor Coating
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