Bleach-containing laundry detergents or cleaning compositions comprising water-soluble builder system and soil release-capable cellulose derivative

• US 7,375,072 B2
• Filed: 08/10/2005
• Issued: 05/20/2008
• Est. Priority Date: 02/10/2003
• Status: Expired due to Fees

• Current Assignee: Henkel AG & Co KGaA
• Original Assignee: Henkel KGaA (Henkel AG & Co KGaA)
• Inventors: Penninger, Josef
• Primary Examiner(s): BOYER, CHARLES I
• Application Number:
  US11/200,679
• Publication Number:
  US 20060035801A1
• Time in Patent Office: 1,014 Days
• Field of Search: 510/276, 510/299, 510/318, 510/359, 510/361, 510/398, 510/400, 510/443, 510/453, 510/436, 510/460, 510/478, 510/477, 510/509, 510/510, 510/511, 510/512, 510/531, 510/534, 510/302, 510/309, 510/310, 510/372, 510/375, 510/379
• US Class Current: 510/478
• CPC Class Codes: C11D 17/0039 Coated compositions or coated components in the compositions, (micro)capsules
• CPC Class Codes: C11D 3/0026 Low foaming or foam regulating compositions
• CPC Class Codes: C11D 3/0036 Soil deposition preventing compositions; Antiredeposition agents
• CPC Class Codes: C11D 3/225 etherified, e.g. CMC
• CPC Class Codes: C11D 3/3942 Inorganic per-compounds C11D3/3902 takes precedence
• CPC Class Codes: D06M 15/09 Cellulose ethers
• CPC Class Codes: D06M 2200/00 Functionality of the treatment composition and/or properties imparted to the textile material

Abstract

A builder-containing laundry detergent or cleaning composition is comprised of: (1) alkali metal percarbonate; (2) a water-soluble builder block which comprised of:

• a) from 5% by weight to 35% by weight of citric acid, an alkali metal citrate, an alkali metal carbonate, and/or an alkali metal hydrogen carbonate,
• b) up to 10% by weight of alkali metal silicate having a modulus in the range from 1.8 to 2.5,
• c) up to 2% by weight of phosphonic acid and/or alkali metal phosphate,
• d) up to 50% by weight of alkali metal phosphate, and
• e) up to 10% by weight of polymeric polycarboxylate,
  wherein at least two of components b), c), d) and e) are present in amounts greater than 0% by weight, and (3) a soil release-capable alkyl or hydroxyalkyl cellulose derivative. The soil release-capable action of cellulose derivatives is particularly marked when they are used in laundry detergents or cleaning compositions which comprise alkali metal percarbonates and contain only water-soluble builders.

Claims

1. A builder-containing laundry detergent or cleaning composition comprising:

(1) alkali metal percarbonate;

(2) a water-soluble builder comprising;

a) from 5% by weight to 35% by weight of either citric acid or an alkali metal citrate in combination with a carbonate mixture comprising an alkali metal carbonate and an alkali metal hydrogen carbonate;

b) from 1% to 5% by weight of alkali metal silicate having a modulus in the range from 1.8 to 2.5;

c) from 0.05% to 1% by weight of phosphonic acid and/or alkali metal phosphonate;

d) from 15% to 35% by weight of alkali metal phosphate;

e) from 1.5% to 5% by weight of polymeric polycarboxylate; and

(3) a soil release-capable cellulose derivative composition comprising a C₁ to C₃ alkyl cellulose derivative and a C₂ to C₁₀ hydroxyalkyl cellulose derivative.

2. The composition of claim 1 wherein the mean molar mass of the cellulose derivative is from 10 000 D to 150 000 D.

3. The composition of claim 2 wherein the mean molar mass of the cellulose derivative is from 40 000 D to 120 000 D.

4. The composition of claim 3 wherein the mean molar mass of the cellulose derivative is from 80 000 D to 110 000 D.

5. The composition of claim 1 comprising from 0.1% by weight to 5% by weight of the cellulose derivative.

6. The composition of claim 5 comprising from 0.5% by weight to 2.5% by weight of the cellulose derivative.

7. The composition of claim 1 wherein the amount of alkali metal percarbonate is from 6% by weight to 30% by weight.

8. The composition of claim 7 wherein the amount of alkali metal percarbonate is from 10% by weight to 25% by weight.

9. The composition of claim 1 wherein the alkali metal percarbonate is particulate and has at least two coating layers, an innermost layer comprising at least one hydrate-forming inorganic salt and an outer layer comprising an alkali metal silicate.

10. The composition of claim 1 further comprising a compound which releases an organic percarboxylic acid under perhydrolysis conditions and/or comprises an organic percarboxylic acid, in particular in an amount of from 0.5% by weight to 6% by weight.

11. The composition of claim 1 wherein the amount of the builder is at least 25% by weight.

12. The composition of claim 1 wherein the amount of the builder is from 25% to 55% by weight.

13. The composition of claim 1 wherein the amount of the builder is from 25% by weight to 50% by weight.

14. The composition of claim 1 wherein component a) is comprised of from 15% by weight to 25% by weight of an alkali metal hydrogen carbonate and from 0.05% to 5% by weight of citric acid and/or alkali metal citrate.

15. The composition of claim 14 wherein the amount of citric acid and/or alkali metal citrate is from 0.5% by weight to 2.5% by weight.

16. The composition of claim 1 wherein component a) is comprised of from 5% by weight to 25% by weight of citric acid and/or alkali metal citrate, and from 1% to 5% by weight of an alkali metal carbonate or an alkali metal hydrogen carbonate or a combination of thereof.

17. The composition of claim 1 wherein component a) comprises an alkali metal carbonate and alkali metal hydrogen carbonate in a weight ratio of from 10:

1 to 1;

1.

18. The composition of claim 1 wherein component c) is a hydroxyalkylphosphonic and/or aminoalkylphosphonic acid and/or the alkali metal salts thereof.

19. The composition of claim 1 wherein alkali metal phosphate is trisodium polyphosphate.

20. The composition of claim 1 wherein the polymeric polycarboxylate is a homo or copolymer of acrylic acid, methacrylic acid and/or maleic acid.

21. A method of cleaning a textile material comprising contacting a textile material with a laundry detergent according to claim 1.

22. A process for producing a solid laundry detergent composition comprising mixing a composition comprised of:

(1) alkali metal percarbonate;

(2) particles of a soil release-capable cellulose derivative composition comprising a C₁ to C₃ alkyl cellulose derivative and a C₂ to C₁₀ hydroxyalkyl cellulose derivative;

(3) a water-soluble builder which is comprised of;

a) from 5% by weight to 35% by weight of either citric acid or an alkali metal citrate in combination with a carbonate mixture comprising an alkali metal carbonate and an alkali metal hydrogen carbonate;

b) from 1% to 5% by weight of alkali metal silicate having a modulus in the range from 1.8 to 2.5;

c) from 0.05% to 1% by weight of phosphonic acid and/or alkali metal phosphonate;

d) from 15% to 35% by weight of alkali metal phosphate;

e) from 1.5% to 5% by weight of polymeric polycarboxylate; and

(4) a laundry detergent in particulate form.

23. The process of claim 22 wherein the particle which comprises the soil release-capable cellulose derivative is prepared by spray-drying.

24. The process of claim 22 wherein the particle which comprises the soil release-capable cellulose derivative is prepared by using a compacting compounding step.