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Copper pyrithione dispersions are highly effective, broad-spectrum antimicrobial agents used primarily as biocides in marine antifouling paints and coatings to prevent algae, fungi, and bacteria growth. They offer superior stability and light color compared to other copper-based antimicrobials. Common commercial forms include aqueous dispersions like Copper Omadine™ AQ 35 (35% active) and Copper Omadine™ Powder AF, which are generally used at 2–10% dosage levels.
- Performance: Excellent protection against algae and mold on marine surfaces and coatings.
- Application: Ideal for fishnet coatings, yachts, and high-performance marine paints due to superior stability.
- Stability: High heat and pH stability, with low water solubility.
- Dispersion Characteristics: Often available in small particle sizes (e.g., in water or as a non-dusting powder) to improve storage stability and inhibit gel formation in formulations.
- Sustainability/Safety: Complies with major environmental and regulatory standards including BPR and REACH, although it is recognized as highly toxic to aquatic life.
Preparation and Formulation
- Synthesis: Often produced via an ion-exchange reaction between a copper salt (e.g., copper chloride) and a pyrithione salt (e.g., sodium pyrithione), usually requiring a surfactant to prevent gelling.
- Usage: The dispersion is added to coatings to provide long-term antimicrobial activity. For example, Copper Omadineâ„¢ AQ 35 is particularly noted for use in fishnet coatings.
- Improvements: Recent innovations include composite materials like diatomite/copper(I) oxide/copper pyrithione, which improve, reduce color intensity, and boost efficiency.
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EP1429605A1 - Non-dusting copper pyrithione dispersion
Google Patents
https://patents.google.com › patent
Google Patents
https://patents.google.com › patent
The copper pyrithione is preferably employed in the dispersion in an amount of between about 20 and 99 wt%, more preferably between about 30 and 70 wt%, even ...
OEM/ODM Copper pyrithione Aqueous Dispersion 37%
China AAB Industry Technology Group
https://www.aabindustrygroup.com › copper-pyrithione-...
China AAB Industry Technology Group
https://www.aabindustrygroup.com › copper-pyrithione-...
Copper Pyrithione Disperion CPT-37 is mainly used for Anti-fouling Antimicrobial for Marine antifouling coatings, coatings, adhesives and so ...Read more
CN101060834B - Copper pyrithione small particles
Google
http://www.google.com › patents
Google
http://www.google.com › patents
These small particles exhibit improved storage stability in dispersions with liquid media, as well as improved leach rates of antifouling paints relative to ...
Copper I-II-containing composites and coatings with high ...
ScienceDirect.com
https://www.sciencedirect.com › science › article › abs
ScienceDirect.com
https://www.sciencedirect.com › science › article › abs
by W Zou2024Cited by 16 — Diatomite/Cu2O/coper-pyrithione shows superior antibacterial activity and lighter color. •. Coatings exhibit high stability, antimicrobial ...Read more
US20040118319A1 - Small particle copper pyrithione
Google Patents
https://patents.google.com › patent
Google Patents
https://patents.google.com › patent
The dispersion is suitably employed as an antifouling additive for marine paints without risking worker exposure to copper pyrithione dust. Paints containing ...
Custom Copper Pyrithione Dispersion
China AAB Industry Technology Group
https://www.aabindustrygroup.com › copper-pyrithione-...
China AAB Industry Technology Group
https://www.aabindustrygroup.com › copper-pyrithione-...
Jul 1, 2025 — We are China Copper Pyrithione Dispersion factory. Professional Copper Pyrithione Dispersion supplier,offer high quality Copper Pyrithione ...
Non-dusting copper pyrithione dispersion - Patent US-6627665-B2
National Institutes of Health (NIH) | (.gov)
https://pubchem.ncbi.nlm.nih.gov › patent › US-66276...
National Institutes of Health (NIH) | (.gov)
https://pubchem.ncbi.nlm.nih.gov › patent › US-66276...
US-6627665-B2 chemical patent summary.
Benefits of Copper Pyrithiones in Anti Corrosive Paints
Esaar International Pvt. Ltd.
https://www.esaar.com › Tabloid
Esaar International Pvt. Ltd.
https://www.esaar.com › Tabloid
Oct 26, 2023 — Pyrithiones are highly effective biocides with significant growth-inhibiting activity against Gram-negative and Gram-positive bacteria, fungus and yeast.Read more
Copper Omadineâ„¢ brand by Arxada - Coating ingredients
SpecialChem
https://www.specialchem.com › Coatings
SpecialChem
https://www.specialchem.com › Coatings
Copper Omadine™ AQ 35 by Arxada is an aqueous dispersion, a broad-spectrum copper complex of pyrithione. It offers very good protection against microbial growth ...Read more
Chemical method of making a suspension, emulsion or ...
Free Patents Online
https://www.freepatentsonline.com › ...
Free Patents Online
https://www.freepatentsonline.com › ...
Apr 29, 2014 — A method for producing a suspension, emulsion, or dispersion of de-agglomerated particles of pyrithione salts, comprising: creating particles, ...Read more
Scholarly articles for Copper Pyrithione dispersion | |
… of low-toxicity copper pyrithione as a multifunctional … - ‎Jia - Cited by 4 Copper I-II-containing composites and coatings with … - ‎Zou - Cited by 16 … of the bioaccumulation and toxicity of copper pyrithione … - ‎Bourdon - Cited by 7 | |