Graffiti cleaning solution including a non-aqueous...

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 3/20 (2006.01) C09D 9/04 (2006.01) C11D 1/72 (2006.01) C11D 1/825 (2006.01)

Patent

CA 2663674

A concentrated non-aqueous cleaning solution having a long shelf life includes an ester and an anhydrous surfactant. The ester is the active ingredient for dissolving graffiti, grease and other contaminants. The ester can be one of or a mixture of dimethyl glutarate, dimethyl succinate, dimethyl adipate, ethyl lactate, and a methyl ester extracted from soybean oil. The anhydrous surfactant is preferably alcohol ethoxylate. The ester in the concentrated solution does not degrade into an acid and alcohol as long as the solution is not mixed with water. This allows the concentrated solution to be shipped and stored and remain efficacious. The concentrate can be diluted with water immediately prior to use. Diluting before use makes the graffiti cleaner less expensive and prevents damage to sensitive surfaces but does not provide long enough time for the ester to degrade.

La présente invention concerne une solution de nettoyage concentrée non aqueuse ayant une longue durée de conservation comportant un ester et un tensioactif anhydre. L'ester est le principe actif pour dissoudre un graffiti, de la graisse et d'autres contaminants. L'ester peut être un ou un mélange de glutarate de diméthyle, succinate de diméthyle, adipate de diméthyle, lactate d'éthyle, et un ester de méthyle extrait de l'huile de soja. Le tensioactif anhydre est, de préférence, un éthoxylate d'alcool. L'ester dans la solution concentrée ne se dégrade pas en un acide et alcool aussi longtemps que la solution n'est pas mélangée avec de l'eau. Cela permet le transport et le stockage du concentré tout en préservant son efficacité. Le concentré peut être dilué avec de l'eau immédiatement avant son utilisation. La dilution avant utilisation rend la solution de nettoyage de graffitis moins cher et empêche l'endommagement de surfaces sensibles mais ne permet pas un temps suffisant pour la dégradation de l'ester.

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