Cleaning formulation and method of cleaning surfaces

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 3/12 (2006.01) C11D 3/06 (2006.01) C11D 3/32 (2006.01) C11D 7/02 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2479503

A cleaning formulation comprising a cleaning agent, a particulate clay material and an aqueous carrier. In a preferred embodiment, the formulation has a pH less than about 1.0 and is characterized by: (i) at least a 90% reduction in viscosity at 25~C at a shear rate of up to about 0.10 s-1, and (ii) a substantially unchanged viscosity for a period of at least 60 days. The cleaning formulation is thixotropic and has a highly desirable combination of acid stability, temperature stability, electrolyte stability and ultraviolet radiation stability.

L'invention concerne une formulation de nettoyage qui comprend un agent de nettoyage, une matière argileuse particulaire et un support aqueux. Dans un mode préféré de réalisation, la formulation présente un pH inférieur à environ 1,0 et se caractérise par : (i) réduction de viscosité d'au moins 90 % à 25 ·C avec une vitesse de cisaillement allant jusqu'à 0,10 s?-1¿ environ, et (ii) viscosité sensiblement stable pendant au moins 60 jours. Cette formulation de nettoyage est thixotrope et associe très avantageusement une stabilité aux acides, une stabilité thermique, une stabilité électrolytique et une stabilité au rayonnement ultraviolet.

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