ANTI-GREYING COMPOSITION FOR LAUNDRY

Abstract

Described herein is a liquid composition including at least component (a) a polymer which is (a1) an ethoxylated hexamethylene diamine polymer, quaternized and optionally sulfated including on average 20 to 30 ethoxylate groups (EO) with an average molecular weight Mw in a range from 2,000 to 10,000 g/mol and mixtures thereof, and/or (a2) an ethoxylated polyethylenimine including on average 15 to 25 ethoxylate groups (EO) per NH-group with an average molecular weight M.sub.W in a range from 5,000 to 20,000 g/mol;
and
component (b) at least one cellulase.

Claims

1. A liquid composition comprising at least component (a) a polymer which is (a1) an ethoxylated hexamethylene diamine polymer, quaternized and optionally sulfated comprising on average 20 to 30 ethoxylate groups (EO) with an average molecular weight Mw in a range from 2,000 to 10,000 g/mol and mixtures thereof, and/or (a2) an ethoxylated polyethylenimine comprising on average 15 to 25 ethoxylate groups (EO) per NH-group with an average molecular weight M.sub.W in a range from 5,000 to 50,000 g/mol; and component (b) at least one cellulase.

2. The liquid composition according to claim 1, wherein (a1) is an ethoxylated hexamethylene diamine polymer, quaternized and sulfated comprising on average 20 to 30 ethoxylate groups (EO) with an average molecular weight Mw in a range from 5,000 to 6,000 g/mol and mixtures thereof.

3. The liquid composition according to claim 1, wherein (a2) is an ethoxylated polyethylenimine comprising on average 15 to 25 ethoxylate groups (EO) per NH-group with an average molecular weight M.sub.W in a range from 12,000 to 14,000 g/mol.

4. The liquid composition according to claim 1, wherein the at least one cellulase is selected from the group consisting of endo-β-1,4-glucanases according to EC 3.2.1.4 and endo-β-1,3-glucanases according to EC 3.2.1.39.

5. The liquid composition according to claim 1, wherein the at least one cellulase is an endo-β-1,4-glucanase which has no carbohydrate binding domain (CBD).

6. The liquid composition according to claim 1, further comprising component (c), which is a copolymer of (i) maleic acid or maleic anhydride, and (ii) at least one hydrophobic monomer selected from the group consisting of isobutene, diisobutene, butene, and mixtures thereof, wherein the copolymer is partially or completely neutralized.

7. The liquid composition according to claim 6, wherein the copolymer has a K-value of 35-45.

8. The liquid composition according to claim 1, further comprising at least one detergent component.

9. The liquid composition according to claim 8, wherein the liquid composition is a liquid laundry detergent.

10. The liquid composition according to claim 8, further comprising at least one anionic surfactant and at least one non-ionic surfactant.

11. A method of using the liquid composition according to claim 1, the method comprising using the liquid composition as an anti-greying additive for laundry detergents.

12. A method of using the liquid composition according to claim 8, the method comprising using the liquid composition for reducing and/or removing greying from textiles.

13. The method according to claim 12, wherein the textiles are selected from the group consisting of cotton and synthetic fabrics.

14. A method of improving anti-greying ability of a cellulase in laundry detergents, said method comprising the step of adding at least component (a) a polymer which is (a1) an ethoxylated hexamethylene diamine polymer, quaternized and optionally sulfated comprising on average 20 to 30 ethoxylate groups (EO) with an average molecular weight Mw in a range from 2,000 to 10,000 g/mol and mixtures thereof, and/or (a2) an ethoxylated polyethylenimine comprising on average 15 to 25 ethoxylate groups (EO) per NH-group with an average molecular weight M.sub.W in a range from 5,000 to 50,000 g/mol; and optionally component (c) comprising at least one copolymer, wherein the copolymer is made of two types of monomers, one monomer selected from the group consisting of unsaturated carboxylic acids and one hydrophobic monomer.

15. A method for reducing and/or removing greying from laundry, said method comprising contacting the laundry with a laundry detergent comprising at least component (a) a polymer which is (a1) an ethoxylated hexamethylene diamine polymer, quaternized and optionally sulfated comprising on average 20 to 30 ethoxylate groups (EO) with an average molecular weight Mw in a range from 2,000 to 10,000 g/mol and mixtures thereof, and/or (a2) an ethoxylated polyethylenimine comprising on average 15 to 25 ethoxylate groups (EO) per NH-group with an average molecular weight M.sub.W in a range from 5,000 to 50,000 g/mol; and component (b) a cellulase.

16. The liquid composition according to claim 8, wherein the liquid composition is a liquid laundry detergent comprising at least one additional enzyme.

17. The liquid composition according to claim 8, wherein the liquid composition is a liquid laundry detergent comprising at least one additional enzyme selected from the group consisting of serine endopeptidase, triacylglycerol lipase, alpha-amylase and endo-1,4-β-mannosidase.

18. The liquid composition according to claim 9, further comprising at least one anionic surfactant and at least one non-ionic surfactant.

19. A method of using the liquid composition according to claim 9, the method comprising using the liquid composition for reducing and/or removing greying from textiles.

20. A method of using the liquid composition according to claim 10, the method comprising using the liquid composition for reducing and/or removing greying from textiles.

Description

EXAMPLES

Liquid Compositions of the Invention Tested

[0194]

TABLE-US-00001 Conc in % by weight LC-I LC-II LC-III LC-IV LC-V LC-VI Component (a1) 0.5-2.0 — 0.5-2.0 0.5-2.0 — 0.5-2.0 Component (a2) — 0.5-2.0 0.5-2.0 — 0.5-2.0 0.5-2.0 Component (b) 0.004-0.007 0.004-0.007 0.004-0.007 0.004-0.007 0.004-0.007 0.004-0.007 Component (c) — — — 0.5-2.0 0.5-2.0 0.5-2.0 [0195] Component (a1): Ethoxylated hexamethylene diamine M.sub.W ∞4,500, 24 EO/NH [0196] Component (a2): Ethoxylated polyethylenimine M.sub.W ˜12,000-14,000 (PEI core ˜600-800), 20 EO/NH [0197] Component (b): Celluclean® 5000 L (Novozymes) [0198] Component (c): copolymer of maleic acid and diisobutene with K-value of about 40 [0199] Concentrations in % by weight relate to 100% active matter

Application Test in the Launder-O-Meter

[0200] The washing performance for the selected compositions was determined in the launder-O-meter (LP2 Typ, SDL Atlas Inc., USA) in beakers of 1L size under the following washing conditions.

TABLE-US-00002 Washing liquor 250 ml Steel balls* 20 pieces each having 6 mm diameter and 0.9 g) Washing time/temperature 30 min at 30° C. Dosage [detergent] 4 g/L ES1_C Washing cycles 3 Water hardness 2.5 mmol/L; Ca.sup.2+:Mg.sup.2+:HCO.sub.3 = 4:1:8 Test fabrics ~15 g [type see below] Soil donor swatches ~2.5 g each [type see below] Sum test fabrics + soil donor swatches ~20 g-~25 g. Soil swatches 2 × 2.5 g [type see below] Fabric/liquor ratio ~1:10-~1:12.5

TABLE-US-00003 ES1_C components % by weight anionic surfactant linear alkylbenzene sulfonate (S1) 5.5 soap C.sub.12-C.sub.18 coco fatty acid 2.4 non-ionic surfactant alkyl polyethyleneglycol ether (S2) 5.4 anionic surfactant sodium laureth sulfate 2EO (S3) 5.4 1,2-pentane diol 6.0 C.sub.2H.sub.5OH 2.0 Sodium citrate 3.0 components (a1), (a2), (b) and (c) individually or in combination as disclosed in LC-I, LC-II, LC-III, LC-IV LC-V and LC-VI above; all comprised as indicated below pH Adjusted with NaOH 8.5-8.7 H.sub.2O up to 100% [0201] S1: linear alkylbenzene sulfonate according to formula (AS-II), wherein one of said anionic surfactants is characterized in R.sup.1 being C.sub.10, and the other surfactant is characterized in R.sup.1 being C.sub.13. [0202] S2: mixture of two non-ionic surfactants according to formula (NIS-I), wherein one of said non-ionic surfactants is characterized in R.sup.1 being n-C.sub.12H.sub.25, R.sup.2 and R.sup.5 being H, m being 7, n and o=0, and the other surfactant is characterized in R.sup.1 being n-C.sub.14H.sub.29, R.sup.2 and R.sup.5 being H, m being 7, n and o=0. [0203] S3: mixture of two anionic surfactant according to formula (AS-I), wherein one of said anionic surfactants is characterized in R.sup.1 being C.sub.11, R.sup.2 being H, m being 2, n and o=0, A.sup.− being SO.sub.3.sup.−, M.sup.+ being Na.sup.+ and the other surfactant is characterized in R.sup.1 being C.sub.13, R.sup.2 being H, m being 2, n and o=0, A.sup.− being SO.sub.3.sup.−, M.sup.+ being Na.sup.+. [0204] All ingredients % by weight relate to 100% active matter. [0205] wfk test fabrics were purchased via wfk Testgewebe GmbH: 41379 Brüggen, Germany. SBL 2004 fabrics and wfk clay were also purchased via wfk Testgewebe GmbH. [0206] EMPA test fabrics were purchased via Swissatest Testmaterialien AG: 9015 St. Gallen, Switzerland. [0207] Tissues were either used as received or cut into pieces as needed. Test fabrics used (10 cm×10 cm squares): [0208] Cotton: wfk10A [standard cotton], wfk80A [cotton knitwear], wfk12A [cotton Terry cloth], EMPA 221 [cotton Cretone bleached], T-shirt according to EN/EC 60456 [0209] Synthetics: wfk20A [PES/Co blend], wfk30A [polyester], EMPA406 [polyamide]

[0210] Soil was a mixture of: [0211] 1. EMPA-SBL: two 2.5 g EMPA 101 and two 2.5 g SBL 2004 fabrics [0212] 2. EMPA-SBL-clay: 2.5 g EMPA 101 and 2.5 g SBL 2004 fabrics and 1.25g wfk clay slurry

[0213] The wfk clay slurry was prepared by homogenizing 120 g of wfk clay and 450 g deionized water, followed by addition of 30 g of an oil mixture that consists of peanut oil (75 parts, e.g. Brändle) and mineral oil (25 parts, lubricating oil O-10-002) and subsequent homogenization.

[0214] The first cycle was run using the launder-O-meter beakers containing the test wash solution (0.25 L) plus test fabrics and ballast soil at 30° C. for 30 min (fabric to liquor ratio of ˜1:10 for EMPA-SBL; 1:12.5 for EMPA-SBL-clay). After the wash and rinsing, the test fabrics and ballast soil were separated. The process was repeated using the washed test fabrics and performing 3 cycles in total.

[0215] New soil was used for each cycle. After the 3 cycles, the test fabrics were rinsed in water, followed by drying at ambient room temperature overnight.

[0216] Rinse step: After washing the soiled swatches were removed from the vessel and placed in a 10 liter bucket. Under continuous tap water (12-21° dH) flow (2-6 l/min), the soiled swatches were rinsed until formation of stable foam was not any more visible in the rinse water.

[0217] Drying Step: The soiled swatches were removed from the rinse water and line dried in a dark closed room under ambient condition for 24 h.

[0218] The greying of the cotton and synthetic test fabrics was measured by determining the spectral reflectance at 460 nm after washing using optical geometry of D:0° on Elrepho spectrometer from Datacolor, USA.

[0219] The anti-greying properties of the detergents tested were then quantified.

[0220] Reflectance values decrease with the visible greying of the fabrics, the higher the reflectance value, the better the anti-greying performance of the detergent. Fabrics ΔR values represent the difference between the reflectance after wash of the test detergent ES1_C containing the liquid composition of the invention and the reflectance after the wash of the test detergent without the liquid composition of the invention for the [0221] summation of 5 cotton fabrics or the 3 “synthetic” fabrics, respectively [0222] individual fabrics

[0223] The following tables Ex2a and Ex2b include results for tested compositions: [0224] ES1_C; [0225] ES1_C+(a1), ES1_C+(a2), ES1_C+(b), ES1_C+(c), ES1_C+LC-I, ES1_C+LC-II, ES1_C+LC-III, ES1_C+LC-IV, ES1_C+LC-V, ES1_C+LC-VI wherein amounts of components (a1), (a2) and (c) of were 1.0% by weight each and (b) was comprised in amounts in the range of 0.006% by weight

TABLE-US-00004 TABLE Ex2a greying on EMPA-SBL: greying is calculated by normalization to ES1_C only which is set 100% greying ES1_C+ cotton synthetic — 100.0 100.0 Component (a1) 104.0 100.6 Component (a2) 111.9 99.2 Component (b) 50.7 97.8 Component (c) 96.6 86.6 LC-I 54.7 100.3 LC-II 50.6 99.6 LC-III 53.4 98.3 LC-IV 37.5 81.5 LC-V 39.8 79.3 LC-VI 39.5 81.3

TABLE-US-00005 TABLE Ex2b greying on EMPA-SBL-clay: greying is calculated by normalization to ES1_C only which is set 100% greying ES1_C+ cotton synthetic cotton/PES — 100.0 100.0 100.0 Component (a1) 90.0 81.9 71.9 Component (a2) 85.1 81.2 66.3 Component (b) 66.8 86.7 53.5 Component (c) 94.2 95.1 89.3 LC-I 62.3 79.9 42.2 LC-II 58.4 80.4 38.8 LC-III 55.4 78.8 34.1 LC-IV 47.9 74.9 22.8 LC-V 51.5 76.3 27.8 LC-VI 44.2 74.6 18.9