Patent ID: 8192553

Claim:
A method of removing heavily soiled surfaces from a substrate, the method comprising: (a) forming a composition having degreasing and metal protecting properties, the composition consisting of: (i) about 30 wt. % to about 80 wt. % alkalinity source; (ii) about 15 wt. % to about 35 wt. % metal protector; (iii) about 2 wt. % to about 10 wt. % surfactant, wherein the surfactant is an alcohol ethoxylate consisting of a C 11 linear alcohol with 3 moles ethylene oxide and a 7 mole ethoxylate of a linear, primary C 12-14 alcohol; (iv) about 5 wt. % to about 20 wt. % water; (v) about 0.2 wt. % to about 2 wt. % threshold agent; and (vi) about 2 wt. % to about 8 wt. % polymer blend that functions as a binding agent and a hard water modifier, wherein the polymer blend consists of about 0.5 wt. % to about 5 wt. % each of polymaleic acid and sodium polyacrylate, and wherein the polymaleic acid and sodium polyacrylate are present at a ratio of about 1:1; (b) removing heavily soiled surfaces from the substrate by contacting the surface of the substrate with the composition.