LIQUID LAUNDRY FORMULATION

Abstract

A method for removing stain or soil from laundry, including contacting the laundry with a laundry detergent composition including an aminocarboxylate builder or co-builder, a polymer, and a protease. The aminocarboxylate may be methylglycine diacetate (MGDA), iminodisuccinic acid (IDS), glutamic acid diacetate (GLDA), ethylenediaminedisuccinic acid (EDDS), polyasparatic acid, and associated salts. The polymer may be an ethoxylated polyethylenimin with an average molecular weight from 3,000 to 250,000 g/mol having 80 to 99% by weight ethylene oxide side chains, based on total ethoxylated polyethylenimine, and/or an ethoxylated hexamethylene diamine, quaternized and optionally sulfated with an average molecular weight from 2,000 to 10,000 g/mol. The disclosure further relates to the use of such compositions for removing stain or soil from laundry, to such laundry compositions themselves and their manufacturing process, as well as to methods of improving stain-removal ability of a protease in laundry detergent compositions.

Claims

1. A method for removing stain or soil from laundry, comprising contacting the laundry with a laundry detergent composition comprising: (a) at least one builder or co-builder which is an aminocarboxylate selected from the group consisting of methylglycine diacetate (MGDA), iminodisuccinic acid (IDS), glutamic acid diacetate (GLDA), ethylenediaminedisuccinic acid (EDDS), polyasparatic acid, and the respective salts thereof; (b) a polymer which is (b1) an ethoxylated polyethylenimine with an average molecular weight M.sub.w in the range from 5,000 to 250,000 g/mol which has 80 to 99% by weight ethylene oxide side chains, based on total ethoxylated polyethylenimine, and/or (b2) a polymer which is an ethoxylated hexamethylene diamine, quaternized and optionally sulfated with an average molecular weight M.sub.w in the range from 2,000 to 10,000 g/mol, and mixtures thereof; and (c) a protease.

2. (canceled)

3. A laundry detergent composition for removing stain or soil from laundry, said composition comprising: (a) at least one builder or co-builder which is an aminocarboxylate selected from the group consisting of methylglycine diacetate (MGDA), iminodisuccinic acid (IDS), glutamic acid diacetate (GLDA), ethylenediaminedisuccinic acid (EDDS), polyasparatic acid, and the respective salts thereof; (b) a polymer which is (b1) an ethoxylated polyethylenimine with an average molecular weight M.sub.w in the range from 5,000 to 250,000 g/mol which has 80 to 99% by weight ethylene oxide side chains, based on total ethoxylated polyethylenimine, and/or (b2) a polymer which is an ethoxylated hexamethylene diamine, quaternized and optionally sulfated with an average molecular weight M.sub.w in the range from 2,000 to 10,000 g/mol, and mixtures thereof; and (c) a protease.

4. A method of improving stain-removal ability of a protease in laundry detergent compositions, said method comprising the step of adding (a) at least one builder or co-builder which is an aminocarboxylate selected from the group consisting of methylglycine diacetate (MGDA), iminodisuccinic acid (IDS), glutamic acid diacetate (GLDA), ethylenediaminedisuccinic acid (EDDS), polyasparatic acid, and the respective salts thereof; and (b) a polymer which is (b1) an ethoxylated polyethylenimine with an average molecular weight M.sub.w in the range from 5,000 to 250,000 g/mol which has 80 to 99% by weight ethylene oxide side chains, based on total ethoxylated polyethylenimine, and/or (b2) a polymer which is an ethoxylated hexamethylene diamine, quaternized and optionally sulfated with an average molecular weight M.sub.w in the range from 2,000 to 10,000 g/mol, and mixtures thereof; and to said protease.

5. (canceled)

6. A method of preparing a laundry detergent composition as provided and defined herein, comprising mixing (a) at least one builder or co-builder which is an aminocarboxylate selected from the group consisting of methylglycine diacetate (MGDA), iminodisuccinic acid (IDS), glutamic acid diacetate (GLDA), ethylenediaminedisuccinic acid (EDDS), polyasparatic acid, and the respective salts thereof; (b) a polymer which is (b1) an ethoxylated polyethylenimine with an average molecular weight M.sub.w in the range from 5,000 to 250,000 g/mol which has 80 to 99% by weight ethylene oxide side chains, based on total ethoxylated polyethylenimine, and/or (b2) a polymer which is an ethoxylated hexamethylene diamine, quaternized and optionally sulfated with an average molecular weight M.sub.w in the range from 2,000 to 10,000 g/mol, and mixtures thereof; and (c) a protease in one or more steps.

7. The method according to claim 1, wherein said aminocarboxylate is MGDA.

8. The method according to claim 1, wherein said protease is subtilisin.

9. The method according to claim 1, wherein said stain is a bleach-sensitive stain or a protease-sensitive stain.

10. The method according to claim 1, wherein said stain is a bleach-sensitive stain.

11. The method according to claim 1, wherein said composition is in liquid form.

12. The method according to claim 1, wherein the builder (a) is present in an amount of 0.1 to 25.0 w/w %, relative to the total weight of the laundry detergent composition.

13. The method according to claim 1, wherein the polymer (b) is present in an amount of 0.1 to 10 w/w %, relative to the total weight of the laundry detergent composition.

14. The method according to claim 1, wherein the protease (c) is present in an amount of 0.1 to 4 w/w %, relative to the total weight of the laundry detergent composition.

15. The composition according to claim 3, wherein said aminocarboxylate is MGDA.

16. The composition according to claim 3, wherein said protease is subtilisin.

17. The composition according to claim 3, wherein said stain is a bleach-sensitive stain or a protease-sensitive stain.

18. The composition according to claim 3, wherein said stain is a bleach-sensitive stain.

19. The composition according to claim 3, wherein said composition is in liquid form.

20. The composition according to claim 3, wherein the builder (a) is present in an amount of 0.1 to 25.0 w/w %, relative to the total weight of the laundry detergent composition.

21. The composition according to claim 3, wherein the polymer (b) is present in an amount of 0.1 to 10 w/w %, relative to the total weight of the laundry detergent composition.

22. The composition according to claim 3, wherein the protease (c) is present in an amount of 0.1 to 4 w/w %, relative to the total weight of the laundry detergent composition.

Description

EXAMPLES

[0178] Application Test for Washing Machine

[0179] The washing performance for the selected compositions was determined as follows.

[0180] The soiled swatches are washed together with cotton ballast fabric (3.5 kg) and 1 soil ballast sheet wfk SBL 2004 in a Miele Household washing machine with cotton program 20? C. After the wash the fabrics are dried in the air.

[0181] The washing performance for the single stains is determined by measuring the remission value of the soiled fabric after wash with the spectrophotometer from Fa. Datacolor (Elrepho 2000) at 460 nm. The protease sensitive stains from the multisoil monitor are measured with a MACH 5 from CFT/Colour consult. The higher the value, the better the performance.

[0182] Washing conditions:

TABLE-US-00003 Test equipment Miele W1935 WPSWTL Washing program Cotton 20? C., 1200 U/min. Dosage 75 ml Testformulation ES1.sup.5) Washing cycles 1 Water hardness 2.5 mmol/l Ca.sup.2+:Mg.sup.2+:HCO.sub.3? 4:1:8 Ballast fabric 3.5 kg cotton towels 1 SBL 2004 .sup.3) Soiled fabric Warwick equest 023 KC .sup.1) Blueberry Warwick equest 101 KC .sup.1) Red cherry Warwick equest 114 KC .sup.1) Strawberry wfk 10 WB .sup.2) Blueberry juice CFT C-S-115 .sup.3) Blueberry juice, unaged CFT KC-H 080 .sup.3) Grass/mud CFT C-S-70 .sup.3) Chocolate mousse/cream EMPA 112 .sup.4) Cocoa EMPA 117 .sup.4) Blood, milk, ink .sup.1) Producer: Warwick Equest Limited, Consett, County Durham. DH8 6BN. England .sup.2) Producer: wfk Testgewebe GmbH, 41379 Br?ggen, Deutschland .sup.3) Producer: Center for Testmaterials By, 3130 AC Vlaardingen, the Netherlands .sup.4) Producer: EMPA Testmaterialien AG, Sankt Gallen, Schweiz .sup.5)Testformulation ES1 comprising (in addition to the additives MGDA, polymer (b1), polymer (b2), subtilisin according to the tables below): Active Matter weight in % (concentration) (relative weight Testformulation ES1 in % to ES1) in g water ad ad ad KOH 50% 1.50% 3.0 Linear C.sub.10C.sub.13 alkylben- 97% 5.64% 5.8 zolsulfonic acid C.sub.12C.sub.18 Coconut fatty acid 100% 2.38% 2.4 C.sub.12C.sub.14 Fatty alcohol ether 70% 5.42% 7.7 sulfate with 2 EO C.sub.13C.sub.15 Oxoalcohol 100% 5.42% 5.4 ethoxylate with 7 EO 1,2 Propandiol 100% 6.00% 6.0 Ethanol pure 100% 2.00% 2.0

[0183] Washing Results

[0184] % Remission (R460) for bleach sensitive stains

TABLE-US-00004 Warwick CFT-C-S-115 Dosage Warwick Warwick 101 KC wfk 10 Blueberry Additive 023 KC 114 KC Red WB Juice CFT-KC-H080 Sum Additive to ES1 [w/w %]* Blueberry Strawberry Cherry Blueberry unaged Grass/mud R460 without 30.6 25.5 19.7 18.5 25.6 31.9 151.7 MGDA 6 32.5 26.7 21.2 21.2 27.7 32.2 161.3 Polymer (b1) 3 32.6 30.3 22.5 23.2 26.8 32.0 167.5 Polymer (b2) 3 33.0 28.4 24.4 23.4 27.1 32.6 168.8 Subtilisin 1 31.7 25.9 24.2 19.2 25.4 33.7 160.1 MGDA Polymer (b1) 6 + 3 36.6 32.0 26.7 27.3 31.7 36.0 190.3 MGDA + Polymer (b2) 6 + 3 41.1 29.3 28.2 27.6 31.7 37.2 195.0 MGDA + Subtilisin 6 + 1 45.5 27.9 27.7 25.6 31.5 38.7 196.9 Polymer (b1) + Subtilisin 3 + 1 44.0 32.6 26.0 26.4 30.7 39.3 199.0 Polymer (b2) + Subtilisin 3 + 1 42.8 29.6 25.1 24.9 30.4 38.9 191.7 MGDA + Polymer (b1) + 6 + 3 + 1 46.4 33.6 29.7 29.1 33.6 39.5 211.9 Subtilisin MGDA + Polymer (b2) + 6 + 3 + 1 46.7 30.7 29.8 28.1 32.4 40.2 207.9 Subtilisin *relative to total composition Without: Without addition of builder (a), polymer (b), and protease (c) according to this invention Polymer (b1): Ethoxylated polyethylenimine M.sub.W ~12,000-14,000 (PEI core ~600-800), 20 EO/NH Polymer (b2): Ethoxylated hexamethylene diamine M.sub.W ~4,500, 24 EO/NH

[0185] Y value for protease sensitive stains

TABLE-US-00005 Dosierung Additiv EMPA CFT C- EMPA Sum Additive to ES1 [w/w %] 117 S-70 112 Y without 34.2 48.8 48.9 131.9 MGDA 6 37.2 53.3 52.1 142.5 Polymer (b1) 3 34.1 54.3 50.5 138.9 Polymer (b2) 3 34.1 54.2 49.7 138.1 Subtilisin 1 52.6 62.3 59.7 174.6 MGDA + Polymer (b1) 6 + 3 38.0 59.4 54.4 151.8 MGDA + Polymer (b2) 6 + 3 36.8 51.8 51.6 140.2 MGDA + Subtilisin 6 + 1 57.4 64.4 61.5 183.3 Polymer (b1) + 3 + 1 53.0 65.2 62.6 180.8 Subtilisin Polymer (b2) + 3 + 1 52.7 61.2 60.8 174.8 Subtilisin MGDA + 6 + 3 + 1 57.1 73.3 64.4 194.7 Polymer (b1) + Subtilisin MGDA + 6 + 3 + 1 58.0 69.6 62.3 189.9 Polymer (b2) + Subtilisin * relative to total composition Without: Without addition of builder (a), polymer (b), and protease (c) according to this invention Polymer (b1): Ethoxylated polyethylenimine Mw~12,000-14,000 (PEI core~600-800), 20 EO/NH Polymer (b2): Ethoxylated hexamethylene diamine Mw~4,500, 24 EO/NH