Liquid laundry detergent

Patent metadata

Field	Value
Publication number	US-9249379-B2
Application number	US-201314407096-A
Country	US
Kind code	B2
Filing date	Mar 8, 2013
Priority date	Jun 21, 2012
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

A colored laundry detergent is provided that photobleaches.

First claim

We claim:

1. A laundry liquid detergent composition comprising:
(i) from 0.0001 to 0.01 wt % of a shading dye comprising an anionic group covalently bound to alkoxy groups; and,
(ii) from 5 to 70 wt % of surfactants selected from anionic and non-ionic surfactants,
wherein a weight fraction of the non-ionic surfactants is from 0.05 to 0.75 of the total wt % of the anionic and non-ionic surfactants,
wherein the non-ionic surfactants comprise an alkyl ethoxylate with a C12 to C15 primary alkyl chain and 7 to 9 ethoxy groups;
wherein the alkyl ethoxylate is from 50 to 100 wt % of a total weight of the non-ionic surfactants, and
wherein the dye is of the form:
Dye-NR 1 R 2 ,

wherein the NR 1 R 2 group is attached to an aromatic ring of the dye and at least one of the R 1 and R 2 groups is independently selected from: a polyoxyalkylene chain having 2 or more repeating units and is terminated by an anionic group,
wherein the dye is a mono-azo dye and the anionic group is selected from: CO 2 − ; and, SO 3 − .

2. A liquid detergent composition according to claim 1 , wherein the alkyl ethoxylate is from 70 to 100 wt % of the total weight of the non-ionic surfactants.

3. A liquid detergent composition according to claim 2 , wherein the alkyl ethoxylate is from 90 to 100 wt % of the total weight of the non-ionic surfactants.

4. A liquid detergent composition according to claim 1 , wherein both R 1 and R 2 are the polyoxyalkylene chains.

5. A liquid detergent composition according to claim 4 , wherein the polyoxyalkylene chain of the dye has from 2 to 12 repeating units.

6. A liquid detergent composition according to claim 1 , wherein the dye is of the form:

wherein D is an aromatic or heteroaromatic group.

7. A liquid detergent composition according to claim 1 , wherein the dye is an azo-thiophene.

8. A liquid detergent composition according to claim 1 , wherein the shading dye is present from 0.0003 to 0.003 wt % of the composition.

9. A liquid detergent composition according to claim 1 , wherein the weight fraction of non-ionic surfactants is from 0.3 to 0.6 of the total wt % of the anionic and non-ionic surfactants.

10. A liquid detergent composition according to claim 1 , wherein the pH of the liquid detergent composition is from 7 to 9.

Assignees

• Conopco Inc

Inventors

• Avila David Victor
• Batchelor Stephen Norman
• Bird Jayne Michelle
• Elliott Peter William

Classifications

• C11D1/83 Primary

  Mixtures of non-ionic with anionic compounds · CPC title

• C11D3/349 Primary

  additionally containing nitrogen atoms, e.g. nitro, nitroso, amino, imino, nitrilo, nitrile groups containing compounds or their derivatives or thio urea · CPC title

• C11D11/0017

  Chemistry & Metallurgy · mapped topic

• C11D1/72

  Ethers of polyoxyalkylene glycols · CPC title

• C11D3/42

  Brightening agents {; Blueing agents} · CPC title