US 3,958,928 AGranted

Reduced-staining colorant system for liquid laundry detergents

AssigneeLever Brothers Company

InventorRobert J. Lala

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Abstract

A dye composition is disclosed together with methods for its use and detergent compositions employing the combination. The dye composition is a mixture of anthraquinone dyes suitable for use with liquid laundry detergents. The composition substantially reduces the undesirable fabric staining characteristic of a detergent in which the dye is employed, while still retaining the ability to blue the fabric. Further, the color value of the detergent product is maintained at a desirable level. The composition is a combination of an oil soluble dye such as 1,4-bis(2-ethylhexylamino)-anthraquinone (C.I. Solvent Blue 58) with a water soluble dye such as 1-amino-2-sulfo, 4-(2-sulfo-para toluidino) anthraquinone sodium salt (C.I. Acid Blue 145) and/or 1,4-bis(3-sodium sulfonate mesitylidino) anthraquinone (C.I. Acid Blue 80).

Claims3

Dependent claims

A liquid synthetic detergent composition having reduced staining characteristics, while retaining the ability to increase the apparent whiteness of fabrics comprising:

about 0.006 to about 0.025 percent by weight of a dye mixture consisting essentially of about 0.0005 to about 0.0030 percent by weight of 1,4-bis(2-ethylhexylamino) anthraquinone and at least one soluble anthraquinone dye selected from the group consisting of 1-amino-2-sulfo, 4-(2-sulfo-para toluidino) anthraquinone sodium salt, 1,4-bis(3-sodium sulfonate-mesitylidino) anthraquinone and mixtures thereof;
0 to about 40 percent by weight of a nonionic detergent;
about 5 to about 20 percent by weight of an alkali metal or organic amine salt of an alkyl aryl sulfonate;
0 to about 30 percent by weight of a builder;
about 3 to about 10 percent by weight of a hydrotrope;
0 to about 10 percent by weight of a stabilizer;
and the balance water to 100 percent.

4 more elements

Dependencies are inferred from the claim text.