US 7,481,873 B2
	Small particle copper pyrithione
Craig Waldron, Wolcott, Conn. (US); Robert J. Martin, Monroe, Conn. (US); Sonia R. Oberson, Shelton, Conn. (US); and Christopher J. Bannon, Manchester, Conn. (US)
Assigned to Arch Chemicals, Inc., Norwalk, Conn. (US)
Filed on Nov. 22, 2004, as Appl. No. 10/994,427.
Application 10/994427 is a continuation in part of application No. 10/325195, filed on Dec. 20, 2002, granted, now 6,821,326.
Prior Publication US 2005/0118134 A1, Jun. 02, 2005
This patent is subject to a terminal disclaimer.
Int. Cl. A01N 31/00 (2006.01); A01N 33/24 (2006.01); A01N 43/72 (2006.01)

U.S. Cl. 106—18.33  [424/405; 514/186; 514/188; 514/937; 516/31; 516/77; 523/122]

28 Claims

1. A composition comprising small particles of copper pyrithione having a particle size within a range of from about 0.1 to about 10 microns, and a median particle size of from 0.2 to less than 0.5 microns, said small particles exhibiting enhanced antimicrobial performance, as compared to larger size copper pyrithione particles, in a marine paint that is exposed to a cold water environment of from about 5 degrees Centigrade to about 15 degrees Centigrade.