Liquid laundry detergent having improved brightener stability

Details Liquid laundry detergent having improved brightener stability Liquid laundry detergent having improved brightener stability

C - Chemistry, Metallurgy

11

D

C11D 3/40 (2006.01) C11D 1/37 (2006.01) C11D 3/30 (2006.01)

Patent

CA 2628829

Liquid laundry compositions containing having improved brightener stability, which contain from about 6% to about 20%, by weight of the laundry composition, of a surfactant component that includes from about 1% to about 6%, by weight of the laundry composition, of a mid-branched primary alkyl sulfate surfactant having an average carbon chain length of from about 16 to about 17 and from about 0.5% to about 9%, by weight of the laundry composition, of an HLAS surfactant selected from alkyl benzene sulfonic acids, alkali metal salts of C10- 16 alkyl benzene sulfonic acids, in combination with from about 0.03% to about 0.2%, by weight of the laundry composition, a water-insoluble optical brightener having a water solubility when measured at about 50~C of from 0 to about 2g/l; and from about 0.5% to about 4%, by weight of the laundry composition, of monethanolamine, wherein the ratio of HLAS surfactant to a total amount of surfactant, on a weight basis, is from about 1: 14 to about 5:7; the ratio of monoethanolamine to the total amount of surfactant is from about 1:15 to about 1:4; and the ratio of water insoluble brightener to the total amount of surfactant is lower than about 1:100. Methods of improving the deposition of a water-insoluble brightener onto fabrics using such compositions.

La présente invention concerne des compositions de blanchissage liquides ayant une meilleure stabilité d'azurant, qui contiennent d~environ 6 % à environ 20 %, en poids de la composition de blanchissage, d~un composant tensioactif qui comprend d~environ 1 % à environ 6 %, en poids de la composition de blanchissage, d~un agent tensioactif de type sulfate d~alkyle primaire à ramification moyenne ayant une longueur de chaîne de carbone moyenne d~environ 16 à environ 17 et d~environ 0,5 % à environ 9 %, en poids de la composition de blanchissage, d~un agent tensioactif HLAS choisi parmi des acides alkylbenzènesulfoniques, des sels de métaux alcalins d~acides alkylbenzènesulfoniques en C10 à C16, en combinaison avec d~environ 0,03 % à environ 0,2 %, en poids de la composition de blanchissage, d~un azurant optique insoluble dans l'eau ayant une hydrosolubilité de 0 à environ 2 g/l lorsqu~elle est mesurée à environ 50 °C ; et d~environ 0,5 % à environ 4 %, en poids de la composition de blanchissage, de monoéthanolamine, le rapport pondéral de l'agent tensioactif HLAS à la quantité totale d'agent tensioactif allant d~environ 1/14 à environ 5/7 ; le rapport de la monoéthanolamine à la quantité totale d~agent tensioactif allant d~environ 1/15 à environ 1/4 ; et le rapport de l'azurant optique insoluble dans l'eau à la quantité totale d~agent tensioactif étant inférieur à environ 1/100. La présente invention concerne également des procédés destinés à améliorer le dépôt d'un azurant optique insoluble dans l'eau sur des tissus utilisant de telles compositions.

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