Detergent Composition

• US 20100249006A1
• Filed: 08/17/2007
• Published: 09/30/2010
• Est. Priority Date: 08/18/2006
• Status: Active Grant

• Current Assignee: Reckitt Benckiser Finish B.V. (Reckitt Benckiser Group PLC)
• Original Assignee: Reckitt Benckiser N.V. (Reckitt Benckiser Group PLC)
• Inventors: Geret, Lawrence, Hardt, Thomas
• Granted Patent: US 8,426,350 B2
• Time in Patent Office: Days
• US Class Current: 510/220
• CPC Class Codes: C11D 17/0078 Multilayered tablets
• CPC Class Codes: C11D 3/0073 Anticorrosion compositions
• CPC Class Codes: C11D 3/28 Heterocyclic compounds containing nitrogen in the ring
• CPC Class Codes: C11D 3/39 Organic or inorganic per-compounds
• CPC Class Codes: C11D 3/3942 Inorganic per-compounds C11D3/3902 takes precedence

Abstract

A detergent composition comprising three or more distinct regions, the composition comprising one or more anti-corrosion agents and a bleaching compound, wherein, the bleaching compound is predominantly located in a first distinct region, and the one or more anti-corrosion agents are predominantly located in a second distinct region having a pH in the range of from 5 to 8.9 which second distinct region is not in direct contact with the first distinct region, and further wherein the second distinct region has a lower pH than the first distinct region.

Claims

1. A detergent composition comprising three or more distinct regions, the composition comprising one or more anti-corrosion agents and a bleaching compound, wherein,

a) the bleaching compound is predominantly located in a first distinct region, and

b) the one or more anti-corrosion agents are predominantly located in a second distinct region having a pH in the range of from 5 to 8.9 which second distinct region is not in direct contact with the first distinct region, and further wherein the second distinct region has a lower pH than the first distinct region.

2. A detergent composition according to claim 1, wherein the detergent composition is an automatic dishwashing detergent composition.

3. A detergent composition according to claim 1, wherein the first distinct region comprises 10% wt or less of the total amount of anti-corrosion agents present in the detergent composition.

4. A detergent composition according to claim 1, wherein the second distinct region comprises at least 60% wt of the total amount of anti-corrosion agents present in the detergent composition.

5. A detergent composition according to claim 1, wherein the first distinct region comprises at least 60% wt of the total amount of bleaching compound present in the detergent composition.

6. A detergent composition according to claim 1, wherein the second distinct region comprises 10% wt or less of the total amount of bleaching compound present in the detergent composition.

7. A detergent composition according to claim 1, wherein,

a) the first distinct region is substantially free of anti-corrosion agents,

b) the second distinct region comprises at least 95% wt of the total amount of anti-corrosion agent in the detergent composition, and

c) at least one further distinct region located between the first and second distinct regions comprises less than 5% wt of the total amount of anti-corrosion agents in the composition.

8. A detergent composition according to claim 1, wherein the second distinct region comprises 100% wt of the total amount of anti-corrosion agents in the detergent composition.

9. A detergent composition according to claim 1, wherein the first distinct region comprises 100% wt of the total amount of bleaching compound in the detergent composition.

10. A detergent composition according to claim 1, wherein the pH of the first distinct region is in the range of from pH 9 to 13.

11. A detergent composition according to claim 1, wherein the pH of the second distinct region is in the range of from pH 5.2 to 8.5.

12. A detergent composition according to claim 1, wherein the at least one anti-corrosion agents is/are selected from benzotriazole or bis-benzotriazole and substituted derivatives thereof and/or metal salts or complexes chosen from the group consisting of zinc, manganese, cobalt and bismuth salts and/or complexes.

13. A detergent composition according to claim 12, wherein the at least one anti-corrosion agent comprises a (substituted) benzotriazole predominantly located in the region in which the anti-corrosion agent is predominantly located.

14. A detergent composition according to claim 1, wherein the bleaching compound is selected from the sodium and potassium salts of percarbonate, perborate and persulphate.

15. A detergent composition according to claim 1, wherein the bleaching compound is present in an amount of from 5 to 25 wt %.

16. A detergent composition according to claim 1, wherein the detergent composition comprises at least two distinct regions which are solid.

17. A detergent composition according to claim 1, wherein the composition further comprises at least one enzyme.

18. A detergent composition according to claim 1, wherein the composition comprises three distinct regions;

1) a first distinct region in which the bleaching compound is predominantly located, the first distinct region having a pH in the range 10 to 12 and comprising 40 to 80% wt of the total weight of the composition

2) a second distinct region in which the anti-corrosion agents are predominantly located, the second distinct region having a pH in the range of from 5.5 to 8 and comprising 2 to 15% wt of the total weight of the composition, and

3) a further distinct region having a pH in the range of from pH 10 to 12 and comprising from 15 to 35% wt of the total weight of the composition.

19. A detergent composition according to claim 1, wherein the second distinct region predominantly comprising the anti-corrosion agents is a solid and is produced by pressing a material to produce a solid distinct region.

21. A process of cleaning soiled items comprising the step of:

contacting the soiled items with a detergent composition according to claim 1.

20. (canceled)