Aqueous structured liquid detergent compositions containing selected peroxygen bleach compounds

• US 5,160,655 A
• Filed: 11/15/1991
• Issued: 11/03/1992
• Est. Priority Date: 02/27/1989
• Status: Expired due to Term

• Current Assignee: Lever Brothers Company, Division Of Conopco, Inc.
• Original Assignee: Lever Brothers Company, Division Of Conopco, Inc.
• Inventors: Hull, Michael, Donker, Cornelis B., van de Pas, Johannes C.
• Primary Examiner(s): Shine, W. J.
• Assistant Examiner(s): McGinty, Douglas J.
• Application Number:
  US07/794,618
• Time in Patent Office: 354 Days
• Field of Search: 252/95, 252/99, 252/103, 252/186.26, 252/186.27, 252/186.3, 252/186.31, 252/186.38, 252/186.42, 252/186.43, 252/100, 252/174.17, 252/102 , 252/186.28, 252/186.25
• US Class Current: 510/303
• CPC Class Codes: C11D 17/0026 Structured liquid compositions, e.g. liquid crystalline phases or network containing non-Newtonian phase
• CPC Class Codes: C11D 3/3947 Liquid compositions

Abstract

An aqueous structured liquid detergent composition comprising detergents active materials and a peroxygen bleach compound, said detergent composition showing less than 25%, preferably less than 10%, more preferably less than 5% volume increase while stored at a temperature between 20° and 37° C. for three months after preparation.

Claims

1. An aqueous structured liquid detergent composition consisting essentially of detergent active materials and a soluble or partially soluble peroxygen bleach compound selected from the group consisting of hydrogen peroxide, peroxyacids, perborates, persulfates, peroxydisulfates, perphosphates and peroxyhydrates formed by reacting hydrogen peroxide with urea or alkali metal carbonate, said detergent composition having a pH between 6.5 and about 11 and showing less than 10% volume increase while stored at a temperature between 20°

and 37°

C. for three months after preparation.

2. An aqueous detergent composition according to claim 1, wherein the structure is formed by the detergent active materials.

3. An aqueous detergent composition according to claim 1, wherein the structure is formed by external structurants.

4. An aqueous detergent composition according to claim 1 having solid suspending properties.

5. An aqueous detergent composition according to claim 1, comprising less than a structure destabilizing amount of a water miscible solvent.

6. An aqueous detergent composition according to claim 1, wherein the composition further comprises an amount of electrolyte which is sufficiently high to effect that at least 30% by weight of the bleach is present in undissolved form.

7. A composition according to claim 6, wherein the amount of undissolved bleach is more than 50% by weight.

8. An aqueous detergent composition according to claim 1 comprising one or more stabilising agents for the bleach compound.

9. An aqueous detergent composition according to claim 1, comprising a bleach activator.

10. An aqueous detergent composition according to claim 1, having a viscosity at 21 s^-1 of between 20 and 1,000 mPas, and a viscosity at 10^-4 s^-1 of more than 10,000 mPas.

11. An aqueous detergent composition according to claim 1 comprising 0.1 to 5.0% of a deflocculating polymer.

12. An aqueous detergent composition according to claim 1 comprising just after preparation less than 5.0% by volume of gas bubbles, said gas bubbles having an average diameter of more than 0.25 mm.

13. An aqueous detergent composition according to claim 1 comprising more than 0.2% by weight of an antifoam agent.

14. Method for the washing of fabrics, comprising the contacting of the fabrics with a wash liquor comprising from 0.1 to 10% of a detergent composition according to claim 1.

15. A composition according to claim 1, wherein the peroxyacid is diperoxydodecandioic acid (DPDA).

16. A composition according to claim 1, wherein the perborate is perboratetetrahydrate.

17. A composition according to claim 6, wherein the amount of undissolved bleach is more than 75% by weight.

18. A composition according to claim 1, wherein the volume increase is less than 5%.

19. A composition according to claim 5, wherein the amount of water miscible solvent is less than 10% by weight.