Ecolab patents Stain
Patent No. U.S. 6,911,069 B2
Ecolab Inc. has received a patent for a coating composition comprised of a hardenable film-former and an effective amount of a reducing agent having a redox potential sufficient to decolorize an iodine or iodophor stain on the film-former. The reducing agent comprises a sulfite, hydrosulfite, nitrite, hydronitrite or hydrophospite and will at least partially decolorize a stain caused by the iodine complexed with polyvinylpyrrolidone when applied to the stain, allowed to stand for one hour at room temperature and evaluated by visual observation of the stain under average overhead fluorescent illumination.