US 6,982,241 B2 | ||
Cleaning composition comprising an inorganic acid mixture and a cationic surfactant | ||
Kim R Smith, Woodbury, Minn. (US); Robert D P. Hei, Baldwin, Wis. (US); Michael E Besse, Golden Valley, Minn. (US); and Jerry D. Hoyt, Hastings, Minn. (US) | ||
Assigned to Ecolab Inc., St. Paul, Minn. (US) | ||
Filed on Nov. 27, 2002, as Appl. No. 10/306,061. | ||
Application 10/306061 is a continuation of application No. 09/659795, filed on Sep. 12, 2000, granted, now 6,489,281, filed on Dec. 03, 2002. | ||
Prior Publication US 2003/0119691 A1, Jun. 26, 2003 | ||
Int. Cl. C11D 7/08 (2006.01); C11D 1/62 (2006.01) |
U.S. Cl. 510—254 | 8 Claims |
1. A cleaning composition comprising:
(a) a product of mixing:
(i) acid component comprising at least one of sulfuric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid, imidophosphoric
acid, thiocyanic acid, and mixtures thereof, wherein said acid component does not include nitric acid and wherein the acid
component has a first pKa of about 2.5 or less;
(ii) source of phosphoric acid component to provide phosphoric acid; and
(iii) penetrant comprising an alkyl ethoxylated quaternary ammonium salt, a propoxylated quaternary ammonium salt, an alkyl
ethoxylated propoxylated quaternary ammonium salt, an alkyl imidazoline quaternary ammonium salt, or mixtures thereof, wherein
the cleaning composition is substantially free of hydrofluoric acid and provides cleaning and brightening of an aluminum surface.
|