Detergent Composition

• US 20100173819A1
• Filed: 08/17/2007
• Published: 07/08/2010
• Est. Priority Date: 08/18/2006
• Status: Abandoned Application

• Current Assignee: Reckitt Benckiser N. V.
• Original Assignee: Reckitt Benckiser N. V.
• Inventors: Hardt, Thomas, Geret, Lawrence
• Application Number:
  US12/377,223
• Publication Number:
  US 20100173819A1
• Time in Patent Office: Days
• US Class Current: 510/367
• CPC Class Codes: C11D 17/0078 Multilayered tablets
• CPC Class Codes: C11D 3/38609 Protease or amylase in solid compositions only
• CPC Class Codes: C11D 3/39 Organic or inorganic per-compounds

Abstract

The present invention provides a detergent composition comprising three or more distinct regions and comprises an enzyme and a bleaching compound, wherein the bleaching compound is predominantly located in a first distinct region and the enzyme is predominantly located in a second distinct region which is not in direct contact with the first distinct region. The use of the detergent composition and a process of cleaning soiled items by contacting therewith the detergent composition are also provided. The detergent compositions exhibit good stability and effective cleaning performance.

Claims

1. A detergent composition comprising an enzyme and a bleaching compound, wherein,

a) the composition comprises three or more distinct regions,

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

c) the enzyme is predominantly located in a second distinct region which is not in direct contact with the first distinct region.

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

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

4. A detergent composition according to any one of the preceding claims, wherein the first distinct region in comprises 10% wt or less of the total amount of enzyme present in the detergent composition.

5. A detergent compositions according to any one of the preceding claims, wherein the second distinct region comprises at least 60% wt of the total, amount of enzyme present in the detergent composition.

6. A detergent composition according to any one of the preceding claims, wherein the first distinct region comprises at least 60% wt of the total amount of bleaching compound present in the detergent composition.

7. A detergent composition according to any one of the preceding claims, wherein the second distinct region comprises 10% wt or less of the total amount of bleaching compound present in the detergent composition.

8. A detergent composition according to any one of the preceding claims, wherein,

a) the first distinct region is substantially free, of enzyme,

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

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

9. A detergent composition according to any one of the preceding claims, wherein the second distinct region comprises 100% wt of the total amount of enzyme in the detergent composition.

10. A detergent composition according to any one of the preceding claims, wherein the first distinct region comprises 100% wt of the total amount of bleaching compound in the detergent composition.

11. A detergent composition according to any one of the preceding claims, wherein the enzyme is selected from proteases, lipases, amylases, cellulases and peroxidases.

12. A detergent composition according to any one of the preceding claims, wherein the bleaching compound is selected from the sodium and potassium salts of percarbonate, perborate and persulphate.

13. A detergent composition according to any one of the preceding claims, wherein the bleaching compound is present in an amount of from 5 to 25 wt %.

14. A detergent composition according to any one of the preceding claims, wherein the detergent composition comprises at least two distinct regions which are solid.

15. A detergent composition according to claim 14, wherein the detergent composition comprises at least three, distinct regions which are solid.

16. A detergent composition according to any one of the preceding claims, wherein the distinct region in which the enzyme is predominantly located has a lower pH than the distinct region in which the bleaching compound is predominantly located.

17. A detergent composition according to any preceding claim, wherein the distinct region in which the enzyme is predominantly located has a pH in the range of from 5.2 to 8.5.

18. A detergent composition according to any preceding claim, wherein the distinct region in which the bleaching compound is predominantly located has a pH in the range of from 9.5 to 12.5.

19. A detergent composition according to any preceding claim, wherein composition further comprises at least one anti-corrosion agent.

20. A detergent composition according to claim 19, wherein the at least one anti-corrosion agent comprises a zinc salt only located in a distinct region adjacent the region in which the bleaching compound is predominantly located and/or a benzotriazole only located in the region in which the enzyme is predominantly located.

21. A detergent composition according to any preceding claim, wherein the composition comprises three distinct regions;

1) the distinct region in which the enzyme is predominantly located 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

2) 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, and

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

22. A detergent composition according to any preceding claim, wherein the distinct region predominantly comprising the enzyme is a solid and is produced by pressing a material to produce a solid distinct region.

23. The use of a detergent composition according to any preceding claim in a cleaning operation.

24. A process of cleaning soiled items by contacting therewith a detergent composition according to any preceding claim.