DETERGENT COMPOSITION

Abstract

The present invention is directed toward a detergent composition including (a) in total in the range of from 4.0% to 25.0% by weight of at least one organic chelating agent selected from methyl glycine diacetic acid (MGDA), glutamic acid diacetic acid (GLDA), the alkali metal salts of methyl glycine diacetic acid (MGDA) and glutamic acid diacetic acid (GLDA), referring to the total solids content of the respective detergent composition, and (b) at least one enzyme selected from proteases. The present invention is also directed toward the use of the detergent composition for laundry care and for automatic dishwashing, and to a process for manufacture of the detergent compositions.

Claims

1-13. (canceled)

14. Process for manufacturing at least one detergent composition comprising protease having at least one of increased protease activity and storage stability, the process comprising mixing, in one or more steps, (a) in total in the range of from 4.0% to 25.0% by weight of at least one organic chelating agent selected from the group consisting of methyl glycine diacetic acid (MGDA), glutamic acid diacetic acid (GLDA), the alkali metal salts of methyl glycine diacetic acid (MGDA) and of glutamic acid diacetic acid (GLDA), referring to the total solids content of the respective detergent composition, and (b) at least one enzyme selected from proteases.

15. (canceled)

16. A method of increasing at least one of protease activity and storage stability of protease in detergent compositions, the method comprising adding at least one organic chelating agent selected from the group consisting of methyl glycine diacetic acid (MGDA), glutamic acid diacetic acid (GLDA), the alkali metal salts of methyl glycine diacetic acid (MGDA) and of glutamic acid diacetic acid (GLDA) in an amount of from 4.0% to 25.0% by weight to a detergent composition comprising protease.

17. The method of claim 16, wherein the detergent composition is at least one of a laundry detergent composition and an automatic dishwashing detergent composition.

18. The method of claim 16, wherein the at least one organic chelating agent is added in an amount of from 5.0% to 15% by weight to the detergent compositions comprising protease.

Description

EXAMPLES

[0150] I. Automatic Dishwashing Experiments

[0151] For all experiments, pre-soiled dish monitors were purchased from the Center for Testmaterials. The soils examined were double soiled egg yolk (DM-22) and the testing was done in a dishwasher of the Whirlpool IV Gold® Series. Values for % clean are calculated by comparing results before and after washing to a perfectly clean melamine tile supplied by Center for Test-materials. ADW formulation used in the Examples:

[0152] 12% Sodium carbonate

[0153] 0 to 30% MGDA

[0154] 3% Plurafac@ SLF-180 (a branched C10 alcohol alkoxylated obtainable by BASF)

[0155] 2% Protease Excellenz™ P 1000 (obtainable by DuPont Genencor)

[0156] Measurement of % Clean [0157] 1. Calibrate the Konica Minolta reflectometer according to the manufacturer's instructions [0158] 2. Measure the “Lab” color space coordinates in 3 places on each pre-soiled dish monitor using the reflectometer. [0159] 3. Wash the panels according to one of the methods listed below. [0160] 4. After the dish monitors have dried completely, measure the “Lab” color space coordinates in 3 places on each monitor, as in step 2. [0161] 5. Calculate % clean for each point by comparing the dE value to a perfectly clean panel, according to the following equations.

dE=[(L.sub.(after wash)−L.sub.(before wash)).sup.2+(a.sub.(after wash)−a.sub.(before wash)).sup.2+(b.sub.(after wash)−b.sub.(before wash)).sup.2].sup.1/2

% clean=100×dE/[((93.95−L.sub.(before wash)).sup.2+(−1−a.sub.(before wash)).sup.2+(2.56−b.sub.(before wash)).sup.2).sup.1/2

[0162] Dishwasher Test Method [0163] 1. Measure the “Lab” color space coordinates before washing the soiled dish monitors as instructed above. [0164] 2. Place one of each soiled dish monitor, evenly spaced, on both the top and bottom racks of the dishwasher. Use the stainless steel dish monitor holders to keep the monitors in place. [0165] 3. Add detergent as indicated for the experiment. [0166] 4. Select the appropriate options on the dishwasher and run one cycle. [0167] 5. Remove the dish monitors and allow them to dry completely before again measuring the “Lab” color space coordinates.

[0168] Results

TABLE-US-00001 TABLE 1 Results % MGDA % Clean 0 47.9 2 55.5 5.9 72.8 7.8 74.8 10 74.3 15 79.7 20 65.9 30 55.9

[0169] The % clean, i.e. the enzyme performance is significantly increased if MGDA is added in amounts of from 4.5 to 25%.

[0170] II. Laundry Detergent Experiments

[0171] Ingredients used

[0172] (a.1): MGDA-Na.sub.3, 40% by weight in water

[0173] (a.2): GLDA-Na.sub.4, 47% by weight in water

[0174] (b.1): Savinase 16L, commercially available from Novozymes

[0175] (b.2): Purafect 4000L, commercially available from Du Pont as Effectenz® P

[0176] (b.3): Purafect Prime 4000L, commercially available from Du Pont as Preferenz® P

[0177] Anionic Surfactants:

[0178] (c.1): 4-sec.-C.sub.10-C.sub.13-alkyl-benzensulfonic acid, sodium salt

[0179] (c.2): stripped coconut soap, potassium salt

[0180] (c.3): n-C.sub.12H.sub.25—O(CH.sub.2CH.sub.2O).sub.2—SO.sub.3Na (sodium laureth sulfate)

[0181] non-ionic surfactants:

[0182] (d.1): 2:1 by weight mixture n-C.sub.13H.sub.27—(OCH.sub.2CH.sub.2).sub.7—OH/n-C.sub.15H.sub.31—(OCH.sub.2CH.sub.2).sub.7—OH

TABLE-US-00002 TABLE 2 Composition of base liquid detergent formulation LDF: Substance g/100 g (c.1) 5.5 (c.2) 2.4 (c.3) 7.7 KOH 2.2 (d.1) 5.4 Ethanol 2   water To 90 g

[0183] Manufacture of inventive laundry detergent compositions was performed by charging a flask with 90 g of base liquid detergent composition, adding enzyme (b) and (a.1) or (a.2), as the case may be, followed by subsequent addition of water to an amount of 100 g.

[0184] The following test formulations were made, see Table 3.

[0185] The test formulations were stored at 37° C. Aliquots were taken after 1, 3, 7, 10, and 14 days and the performance was measured in the launderometer at 40° C. wash temperature, test formulation dose 5 g detergent/I liquor, water hardness 14 ° dH, liqueur ratio 1:12, on stain blood/milk/ink EMPA117. Once washed, the stains were rinsed and dried. The final reflectance (L*a*b, D65 illuminant) of each swatch was determined by using a reflectometer (Elrhepho Datacolor).

TABLE-US-00003 TABLE 3 composition of test formulations Corresponds (b), Corresponds enzyme performance (a), amount to wt % (a) amount to wt % (b) after 14 d [%] TF.1 (a.1), 7.5 g/100 g 11.5 (b.1) 0.3 88 TF.2 (a.1), 6 g/100 g 9.4 (b.1) 0.3 81 TF.3 (a.1), 4.5 g/100 g 7.2 (b.1) 0.3 77 TF.4 (a.1), 3 g/100 g 4.9 (b.1) 0.3 77 C-TF.5 (a.1), 1.5 g/100 g 2.9 (b.1) 0.3 72 C-TF.6 — — (b.1) 0.3 79 TF.7 (a.1), 7.5 g/100 g 11.5 (b.2) 0.3 86 TF.8 (a.1), 6 g/100 g 9.4 (b.2) 0.3 83 TF.9 (a.1), 4.5 g/100 g 7.2 (b.2) 0.3 76 TF.10 (a.1), 3 g/100 g 4.9 (b.2) 0.3 74 C-TF.11 (a.1), 1.5 g/100 g 2.9 (b.2) 0.3 69 C-TF.12 — — (b.2) 0.3 74 TF.13 (a.1), 7.5 g/100 g 11.5 (b.3) 0.4 96 TF.14 (a.1), 6 g/100 g 9.4 (b.3) 0.4 91 TF.15 (a.1), 4.5 g/100 g 7.2 (b.3) 0.4 79 TF.16 (a.1), 3 g/100 g 4.9 (b.3) 0.4 70 C-TF.17 (a.1), 1.5 g/100 g 2.9 (b.3) 0.4 63 C-TF.18 — — (b.3) 0.4 n.d.

[0186] Amounts in Table 3 are tel quell.

[0187] Wt % (a) and wt % (b) refer to the solids content

[0188] The enzyme performance after 14 d is expressed in % of initial performance

[0189] With (a.2), a similar trend could be observed.

[0190] If the enzyme activity drops to less than 70% within 14 days the wash results are usually deemed commercially inacceptable.