Liquid hand dishwashing detergent

• US 20030220215A1
• Filed: 05/21/2002
• Published: 11/27/2003
• Est. Priority Date: 05/21/2002
• Status: Active Grant

• Current Assignee: Clariant Finance (Bvi) Limited
• Original Assignee: Clariant Finance (Bvi) Limited
• Inventors: Manske, Scott D.
• Granted Patent: US 6,800,599 B2
• Time in Patent Office: Days
• US Class Current: 510/220
• CPC Class Codes: C11D 1/143 Sulfonic acid esters
• CPC Class Codes: C11D 1/146 Sulfuric acid esters
• CPC Class Codes: C11D 1/37 Mixtures of compounds all of which are anionic
• CPC Class Codes: C11D 1/75 Amino oxides
• CPC Class Codes: C11D 1/83 Mixtures of non-ionic with anionic compounds
• CPC Class Codes: C11D 1/90 Betaines
• CPC Class Codes: C11D 1/94 Mixtures with anionic, cationic or non-ionic compounds
• CPC Class Codes: C11D 3/2068 Ethers

Abstract

The invention relates to a class of detergent compositions for use in hand dishwashing that provides excellent performance as measured by persistence of foam in the presence of oily and fatty types of soils. Testing based on escalating amounts of such soils to the extinction of the foam showed surprising advantage of hand dishwashing composition comprising at least two anionic surfactants and a polyethylene glycol and being essentially free of alkyl polyglucosides.

Claims

1. A dishwashing detergent composition comprising an anionic surfactant mixture containing at least two different anionic surfactants, a polyethylene glycol, water, and a phase stabilizer selected from the group consisting of a hydrotrope, an inorganic salt, and mixtures thereof, wherein said dishwashing detergent composition is essentially free of alkyl polyglucoside surfactants and the polyethylene glycol having a molecular weight ranging from about 400 to about 1000 comprises from about 0.5 to 10 weight percent of the dishwashing detergent.

2. The dishwashing detergent of claim 1 wherein the anionic surfactant mixture comprising at least two different surfactants are selected from the group consisting of an alkane sulfonate, an alkyl benzene sulfonate, an alpha olefin sulfonate, an alkyl sulfate, an alkyl ether sulfate, an alkyl ester sulfonate, and mixtures thereof.

3. The dishwashing detergent of claim 1 wherein the inorganic salt is selected from the group consisting of magnesium chloride, magnesium sulfate, and mixtures thereof.

4. The dishwashing detergent of claim 1 wherein the hydrotrope is selected from the group consisting of ethanol, isopropanol, sodium xylene sulfonate, propylene glycol, dipropylene glycol, sodium cumene sulfonate, and mixtures thereof.

5. The dishwashing detergent of claim 1 further comprising a foam stabilizing surfactant selected from the group consisting of a betaine compound, an amine oxide, an alkanolamide compound, and mixtures thereof.

6. The dishwashing detergent of claim 5 wherein the betaine compound is selected from the group consisting of coco acylamidopropyldimethyl betaine;

hexadecyl dimethyl betaine;

C₁₂-C₁₄ acylamidopropylbetaine;

C₁₂-C₁₈ acylamidohexyldiethyl betaine;

4-(C₁₄-C₁₆ acylmethylamidodiethylammonio)-1-carboxybutane;

C₁₆-C₁₈ acylamidodimethylbetaine;

C₁₂-C₁₆ acylamidopentanediethyl-betaine;

C₁₂-C₁₆ acylmethyl-amidodimethylbetaine, coco amidopropyl betaine, and mixtures thereof.

7. The dishwashing detergent of claim 1 wherein the anionic mixture comprises a first anionic surfactant comprised of an alkyl sulfonate and a second anionic surfactant selected from the group consisting of alpha olefin sulfonate, alkyl ether sulfate, alkyl sulfate, alkyl benzene sulfonate, alkyl ester sulfonate, and mixtures thereof.

8. The dishwashing detergent of claim 7 wherein the anionic surfactant mixture comprises 6-30 wt-% of a first surfactant and 6-30 wt-% of a second anionic surfactant.

9. The dishwashing detergent of claim 1 wherein the polyethylene glycol comprises a molecular weight from about 400 to about 800.

10. The dishwashing detergent of claim 1 wherein the polyethylene glycol comprises a molecular weight from about 400 to about 600.

11. The dishwashing detergent of claim 7 wherein a ratio of the first anionic surfactant to the second anionic surfactant ranges from about 5:

1 to 1;

5.

12. The dishwashing detergent of claim 1 wherein a total surfactant level ranges from about 15 to about 60 weight percent.

13. The dishwashing detergent of claim 1 wherein a total surfactant level ranges from about 20 to about 50 weight percent.

14. The dishwashing detergent of claim 1 wherein the dishwashing detergent comprises less than about 0.005 wt-% alkyl polyglucoside surfactants.

15. The dishwashing detergent of claim 5 wherein the amine oxide is selected from the group consisting of C₁₀-C₁₈ alkyl dimethyl amine oxides, C₈-C₁₂ alkoxy ethyl dihydroxyethyl amine oxides, alkyl amidopropyl amine oxide, and mixtures thereof.

16. The dishwashing detergent of claim 5 wherein the alkanoamide compound is selected from the group consisting of alkyl monoalkanol amide, alkyl dialkanol amide and mixtures thereof.

17. The dishwashing detergent of claim 5 wherein a ratio of the foam stabilizing surfactant to the anionic surfactant mixture comprises about 1:

2 or less.

18. The dishwashing detergent of claim 7 wherein a ratio of the first anionic surfactant to the second anionic surfactant ranges from about 3:

1 to 1;

3.

19. The dishwashing detergent of claim 7 wherein a ratio of the first anionic surfactant to the second anionic surfactant ranges from about 1.5:

1 to 1;

1.5.

20. A liquid dishwashing detergent consisting essentially of:

water;

about 5 to 30% by weight of an anionic surfactant;

about 5 to 30% by weight of a co-anionic surfactant;

about 0.5 to 10% by weight of polyethylene glycol;

about 0 to 15% by weight of a foam stabilizing surfactant; and

,

about 0 to 15% by weight of optional ingredients;

wherein the polyethylene glycol has a molecular weight ranging from about 400 to about 1000.

21. The liquid dishwashing detergent of claim 20 wherein the anionic surfactant comprises an alkyl sulfonate and the co-anionic surfactant is selected from the group consisting of an alpha olefin sulfonate, an alkyl ether sulfate, and mixtures thereof with the proviso that a ratio of the anionic surfactant to the co-anionic surfactant is between about 0.5 and less than 1.0.

22. The liquid dishwashing detergent of claim 20 wherein the foam stabilizing surfactant comprises a betaine compound and/or an amine oxide.

23. The dishwashing detergent of claim 20 wherein the optional ingredients are selected from the group consisting of hydrotropes, perfumes, colorants, pH adjusting agents, preservatives, biocidal agents, inorganic salts, opacifiers, viscosity modifiers, and mixtures thereof.