Patent ID: 6124253
Filing Date: 2000-09-26
Classification: C11D,C23G

Abstract:
An alkaline, aqueous metal-cleaning composition comprising:(A) an active-ingredient portion comprising:(1) 20% to 80% of an alkalinity-providing component selected from the group consisting of an alkali metal carbonate, an alkali metal bicarbonate, and mixtures thereof; and(2) 20% to 80% of a surfactant mixture comprising:(a) at least one first non-ionic, ethoxylated linear primary alcohol surfactant having a hydrophobic carbon chain length of from 9 to 11 carbon atoms and being ethoxylated with (i) an average of 2.5 moles of ethylene oxide;(b) at least one second non-ionic, ethoxylated linear primary alcohol surfactant having a hydrophobic carbon chain length of from 9 to 11 carbon atoms and being ethoxylated with an average of 6.0 moles of ethylene oxide; and(c) at least one third surfactant, wherein the third surfactant is an N-(n-alkyl)-2 pyrrolidone wherein the alkyl group has from 6 to 15 carbon atoms; and(B) an aqueous portion wherein said the aqueous cleaning composition has a pH of from greater than about 7.5 and up to about 11.0.