Patent ID: 7091166
Filing Date: 2006-08-15
Classification: C11D

Abstract:
1. An aqueous liquid composition comprising: water; at least one acid selected from the group consisting of carboxylic acids, hydroxycarboxylic acids and inorganic acids other than phosphoric acid wherein the at least one acid is present in an amount from about 100 to about 3,000 milliequivalents per kilogram of total composition (“mEq/kg”); an amphoteric surfactant wherein the amphoteric surfactant is present in an amount from about 0.01 to about 20 grams per kilogram of total composition (“g/kg”), the aqueous liquid composition having a pH from about 2.0 to about 6.1; a non-ionic surfactant present in the composition in a weight percent from 5 to 50 g/kg, based on the total weight of the composition; and a hydrotrope in an amount sufficient to produce a stable homogeneous solution or dispersion of the at least one acid, the amphoteric surfactant and the non-ionic surfactant in water, the composition being substantially or entirely free from volatile organic solvents, wherein the water is present in the composition in a weight percent of about 83–89%, based on the total weight % of the composition, wherein the composition further comprises: a 45% solution of potassium hydroxide present in the composition in a weight percent about 2.5–4.6%, based on the total weight of the composition; sodium bisulfite present in the composition in a weight percent about 0.08%, based on the total weight of the composition; and the hydrotrope includes sodium cumene sulfonate present in the composition in a weight percent about 1.1–2.1%, based on the total weight of the composition.