Patent ID: 7592301
Filing Date: 2009-09-22
Classification: C11D

Abstract:
1. A cleaning composition comprising: (a) an anionic surfactant and an alkanolamine; and (b) a water hardness anti-precipitant mixture comprising 0.5-1.5 wt % of maleic anhydride/olefin co-polymer and 0.001-10 wt % of EO-PO co-polymer at a weight ratio of the maleic anhydride/olefin co-polymer to the EO-PO co-polymer of between about 1:75 and about 75:1, wherein the amount of the water hardness anti-precipitant mixture to the anionic surfactant and amine is sufficient to prevent visible precipitation when the cleaning composition is diluted with dilution water having one grain hardness at a weight ratio of 1:1; (c) the EO-PO co-polymer having the formula: wherein EO is an ethylene oxide group, PO is a propylene oxide group, x is between about 10 to about 130 and y is between about 15 to about 70.