Laundry treatment compositions

Details Laundry treatment compositions Laundry treatment compositions

C - Chemistry, Metallurgy

11

D

C11D 3/40 (2006.01) C11D 3/00 (2006.01)

Patent

CA 2529726

A laundry treatment composition which comprises a surfactant and from 0.0001 to 0.02 wt% of a photostable acid dye which has a substantivity to non- mercerised cotton in a standard test of at least 8% but has a substantitivity to nylon of less than 5%, wherein the standard test involves a solution of dye being prepared such that the solution has (i) an optical density of 1 (5 cm pathlength) at the maximum absorption of the dye in the visible wavelengths, (ii) a sodium lauryl alkyl benzene sulphonate surfactant concentration of 0.3 g/l, (iii) inorganic non-surfactant salt concentration of 1.1 g/l, (iv) under wash conditions of a liquor to cloth ratio of 45:1, temperature of 20~C, soak times of 45 minutes, and an agitation time of 10 minutes.

L'invention porte sur une composition de traitement pour blanchisserie comprenant un tensioactif et de 0,0001 à 0,02 % en poids d'un colorant acide photostable qui a une affinité au coton non mercerisé dans un test standard d'au moins 8 %, mais a une affinité au nylon inférieure à 5 %. Le test standard met en oeuvre une solution de colorant préparée de sorte que la solution ait (i) une densité optique de 1 (longueur du trajet 5 cm) au niveau d'absorption maximum du colorant dans les longueurs d'onde visibles, (ii) une concentration de tensioactifs de sodium lauryl alkyle benzène sulfonée de 0,3 g/l, (iii) une concentration de sel inorganique sans tensioactif de 1,1 g/l, (iv) dans des conditions de lavage d'un rapport lessive/vêtements de 45:1, une température de 20 ·C, des durées de trempage de 45 minutes et un temps d'agitation de 10 minutes.

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