Thickened abrasive-free cleaning composition containing a...

C - Chemistry – Metallurgy – 11 – D

Patent

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C11D 3/14 (2006.01) C11D 3/02 (2006.01) C11D 3/04 (2006.01) C11D 3/12 (2006.01) C11D 3/395 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2253337

An abrasive-free cleaning composition is provided which includes, in aqueous solution, a bleach, a colloidal thickener, and a source of divalent ionic calcium. The composition further includes at least one surfactant effective to provide cleaning activity and, in association with the colloidal thickener, thickening. The composition also includes an electrolyte/buffer effective to promote an environment in which the thickener and surfactant associate to provide thickening. The cleaning composition has desirable viscosity and rheological properties, and demonstrates significant viscosity stability, phase stability and bleach stability. The cleaning composition maintains these desirable properties under typical storage conditions as well as over extended times and at elevated temperatures. The figure compares the viscosity stability of the provided cleaning compositions with a composition which does not contain ionic calcium. A method of preparing an abrasive-free cleaning composition and a method of cleaning a substrate with an abrasive-free cleaning composition are also provided.

L'invention concerne une composition de nettoyage exempte d'abrasifs. Cette composition comprend, en solution aqueuse, un agent de blanchiment, un épaississeur colloïdal, et une source de calcium ionique divalent. La composition comprend, en outre, au moins un tensioactif pour assurer une action de nettoyage et un épaississement, en association avec l'épaississeur colloïdal. La composition comprend également un électrolyte/tampon permettant de fournir un environnement dans lequel l'épaississeur et le tensioactif se combinent pour assurer un épaississement. La composition de nettoyage présente une viscosité et des propriétés rhéologiques requises, ainsi qu'une stabilité de viscosité, de phase et de blanchiment significative. Cette composition conserve ces propriétés désirables dans des conditions de stockage typiques, ainsi que pendant des laps de temps prolongés et à des températures élevées. La figure compare la stabilité de la viscosité des compositions de nettoyage obtenues avec une composition dépourvue de calcium ionique. L'invention traite aussi d'un procédé de préparation d'une composition de nettoyage exempte d'abrasifs et d'un procédé de nettoyage avec une composition de nettoyage exempte d'abrasifs.

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