Liquid detergent formulation, use of a liquid detergent formulation, and method for washing a textile article.

Description

Liquid detergent formulation, use of a liquid detergent formulation, and method for washing a textile article.

[001] The present invention relates to a liquid detergent formulation for washing clothes for domestic use at low temperatures. In particular, the present invention relates to a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency comprising: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxy-alkane-1-sulfonates,beta-alkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof; (b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I), R6-O-(EO)x -(AO)y--(EO) zH (I)

[002] where R6 is a linear Cs-is alkyl group; where AO is an oxyalkylene group with 3 to 5 carbon atoms; where x is from 2 to 4; where y is from 6 to 25; where z is from 1 to 50; and (c) a cleaning enhancer of formula (II) (II) where each R1 is independently a Formula chain Petition 870250086943, dated 09 / 25 / 2025, p. 9 / 43 / 29 (III) (III) wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); wherein R3 and R4 are independently an aliphatic C3-12 alkanedi-yl group; wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; wherein n is an average of 0 to 8; wherein m is an average of 5 to 50; and with the cleaning enhancer having a weight-average molecular weight of <10,000 Daltons; and with the liquid laundry soap formulation having a pH of 6.5 to 11.

[003] The efficiency of fabric cleaning depends on the temperature of the washing liquid. Lowering the temperature of the washing liquid generally leads to weaker soil removal. However, cleaning fabric items under low-temperature conditions is unavoidable during the winter months in many geographical regions. That is, many consumers do not have a hot water supply in their homes, and the municipal water supply can sometimes be at temperatures of 10°C when fed into washing machines. Furthermore, consumers are increasingly opting to wash clothes without heating to reduce energy consumption and carbon emissions. Regardless of the washing water temperature, consumers expect their laundry detergent to work consistently.

[004] Consequently, there is a continuing need for laundry detergent formulations that exhibit effective detergency for cleaning water temperatures at < 15 °C (preferably < 10 °C). Petition 870250086943, dated 09 / 25 / 2025, page 10 / 43 / 29

[005] The present invention provides a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency comprising: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxy-alkane-1-sulfonates, betaalkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof;(b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I); R6-O-(EO)x -(AO)y--(EO)zH (I) where R6 is a linear Cs-is alkyl group; where AO is an oxyalkylene group with 3 to 5 carbon atoms; where x is from 2 to 4; where y is from 6 to 25; where z is from 1 to 50; and (c) a cleaning enhancer of formula (II) (II) where each R1 is independently a chain of Formula (III) (III) Petition 870250086943, dated 09 / 25 / 2025, p. 11 / 43 / 29 wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); wherein R3 and R4 are independently an aliphatic C3-12 alkanedi-yl group; wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; wherein n is an average of 0 to 8; wherein m is an average of 5 to 50; and with the cleaning enhancer having a weight-average molecular weight of <10,000 Daltons; and the liquid laundry soap formulation having a pH of 6.5 to 11.

[006] The present invention provides a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency comprising: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxy-alkane-1-sulfonates, betaalkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof;(b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I); wherein R6 is a linear C8-18 alkyl group; wherein AO is an oxyalkylene group with 3 to 5 carbon atoms; wherein x is from 2 to 4; wherein y is from 6 to 25; wherein z is from 1 to 50; and (c) a cleaning enhancer of formula (II); wherein each R1 is independently a chain of formula (III); wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); wherein R3 and R4 are independently; Petition 870250086943, dated 09 / 25 / 2025, page 12 / 43 / 29 an aliphatic C3-12 alkanedi-yl group; wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; wherein n is an average of 0 to 8; wherein m is an average of 5 to 50; and wherein the cleaning enhancer has a weight-average molecular weight of <10,000 Daltons; wherein the liquid laundry detergent formulation has a pH of 6.5 to 11; and wherein the liquid laundry detergent formulation additionally comprises water.

[007] The present invention provides a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency comprising: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxy-alkane-1-sulfonates, betaalkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof;(b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I); where R6 is a linear C8-18 alkyl group; where AO is an oxyalkylene group with 3 carbon atoms; where x is from 2 to 4; where y is from 6 to 25; where z is from 1 to 50; and (c) a cleaning enhancer of formula (II); where each R1 is independently a chain of formula (III); wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); wherein R3 and R4 are independently an aliphatic C3-12 alkanedi-yl group; wherein each R5 is independently selected from; Petition 870250086943, dated 09 / 25 / 2025, page 13 / 43 / 29 group consisting of a hydrogen and a C1-4 alkyl group; wherein n is an average of 0 to 8; wherein m is an average of 5 to 50; and wherein the cleaning enhancer has a weight-average molecular weight of <10,000 Daltons; wherein the liquid laundry detergent formulation has a pH of 6.5 to 11; wherein the liquid laundry detergent formulation additionally comprises water; and wherein the liquid laundry detergent formulation comprises from 5 to 95%, by weight, based on the weight of the liquid laundry detergent formulation, of the anionic surfactant (a) plus the nonionic surfactant (b).

[008] The present invention provides a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency comprising: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxy-alkane-1-sulfonates, betaalkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof;(b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I); wherein R6 is a linear C8-18 alkyl group; wherein AO is an oxyalkylene group with 3 carbon atoms; wherein x is from 2 to 4; wherein y is from 6 to 25; wherein z is from 1 to 50; and (c) a cleaning enhancer of formula (II); wherein each R1 is independently a chain of formula (III); wherein each R2 is independently; Petition 870250086943, dated 09 / 25 / 2025, p. 14 / 43 / 29 selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); wherein R3 and R4 are independently an aliphatic C3-12 alkanedi-yl group; wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; where n is an average of 0 to 8; where m is an average of 5 to 50; and with the cleaning enhancer having a weight-average molecular weight of <10.000 Daltons; wherein the liquid laundry detergent formulation has a pH of 6.5 to 11; wherein the liquid laundry detergent formulation additionally comprises water; wherein the liquid laundry detergent formulation comprises from 5 to 95%, by weight, based on the weight of the liquid laundry detergent formulation, of the anionic surfactant (a) plus the nonionic surfactant (b); and wherein the nonionic surfactant comprises 15 to 60%, by weight, of the combined weight of the anionic surfactant (a) and the nonionic surfactant (b).

[009] The present invention provides a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency comprising: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxy-alkane-1-sulfonates, betaalkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof;(b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I); wherein R6 is a C8-18 group; Petition 870250086943, dated 09 / 25 / 2025, p. 15 / 43 / 29 linear alkyl; where AO is an oxyalkylene group with 3 carbon atoms; where x is from 2 to 4; where y is from 6 to 25; where z is from 1 to 50; and (c) a cleaning enhancer of formula (II); where each R1 is independently a chain of formula (III); where each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); where R3 and R4 are independently an aliphatic C3-12 alkanedi-yl group; where each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; where n is an average of 0 to 8; where m is an average of 5 to 50; and with the cleansing enhancer having a weight-average molecular weight of <10.000 Daltons; wherein the liquid laundry detergent formulation has a pH of 6.5 to 11; wherein the liquid laundry detergent formulation further comprises water; wherein the liquid laundry detergent formulation comprises 5 to 95%, by weight, based on the weight of the liquid laundry detergent formulation, of the anionic surfactant (a) plus the nonionic surfactant (b); wherein the nonionic surfactant comprises 15 to 60%, by weight, of the combined weight of the anionic surfactant (a) and the nonionic surfactant (b); and wherein the liquid laundry detergent formulation further comprises a water-miscible organic solvent.

[0010] The present invention also provides the use of a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency for cleaning fabrics under cold washing conditions; wherein the synergistic blend with low-temperature detergency comprises: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzenesulfates, alkylbenzenesulfonic acids, alkylbenzenesulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, esters of Petition 870250086943, dated 09 / 25 / 2025, page 16 / 43 / 29 alpha-sulfocarboxylates, alkyl glyceryl ether sulfonic acids, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxy-alkane-1-sulfonic acids, 2-acryloxy-alkane-1-sulfonates, beta-alkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof; (b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I); wherein R6 is a linear Cs-18 alkyl group; where AO is an oxyalkylene group with 3 to 5 carbon atoms; where x is from 2 to 4; where y is from 6 to 25; where z is from 1 to 50; and wherein the nonionic surfactant is selected based on its ability to impart detergency stability to the laundry detergent formulation for cleaning water temperatures in the range of 10 to 30 °C;and (c) a cleaning enhancer of formula (II); wherein each R1 is independently a chain of formula (III); wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); wherein R3 and R4 are independently an aliphatic C3-12 alkanedi-yl group; wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; wherein n is an average of 0 to 8; wherein m is an average of 5 to 50; and with the cleaning enhancer having a weight-average molecular weight of <10,000 Daltons; and wherein the liquid laundry detergent formulation has a pH of 6.5 to 11.

[0011] The present invention provides a method for washing a fabric article comprising: providing a soiled fabric article; providing a liquid laundry detergent formulation of the present invention; providing wash water at a temperature < 15 °C; and applying the wash water and the liquid laundry detergent formulation to the soiled fabric article to provide a clean fabric article. Detailed description Petition 870250086943, dated 09 / 25 / 2025, page 17 / 43 / 29

[0012] It has been surprisingly discovered that aqueous liquid laundry detergents specifically formulated with a combination of a selection of anionic surfactants; a non-ionic surfactant having the formula (I) R6-O-(EO)x -(AO)y--(EO) zH (I) where R6 is a Cs-1s alkyl group (preferably a linear C10-18 alkyl group; more preferably a linear C12-14 alkyl group or a linear C16-1s alkyl group; where AO is an oxyalkylene group with 3 to 5 carbon atoms (preferably 3 to 4 carbon atoms; more preferably 3 carbon atoms); where x is 2 to 4 (preferably 4); where y is 6 to 25 (preferably 7 to 20; more preferably 8 to 15; most preferably 8 to 14); from the cleanup of formula (II) (II) where each R1 is independently a chain of Formula (III) (III) wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); wherein R3 and R4 are independently an aliphatic C3-12 alkanedi-yl group; wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; wherein n is an average of 0 to 8; wherein m is an average of 5 to 50; and wherein the cleaning enhancer has a weight Petition 870250086943, dated 09 / 25 / 2025, page 18 / 43 / 29 molecular weight average of <10,000 Daltons; and given that the liquid laundry detergent formulation has a pH of 6.5 to 11; they exhibit exceptional detergency for cleaning water temperatures of < 15 °C (preferably < 10 °C).

[0013] Unless otherwise indicated, ratios, percentages, parts and the like are by weight.

[0014] As used herein, except where otherwise indicated, the phrase “molecular weight” or Mw refers to the weight-average molecular weight measured conventionally using gel permeation chromatography (GPC) and conventional standards such as polystyrene molecular weight standards. GPC techniques are discussed in detail in Modern Size-Exclusion Liquid Chromatography - Practice of Gel Permeation and Gel Filtration Chromatography, Second Edition, AM Striegel, WW Yau, JJ Kirkland, DD Bly; John Wiley & Sons, Inc. 2009. Molecular weights are reported herein in units of Daltons or, equivalently, g / mol.

[0015] The term “low-temperature detergency stability,” as used herein and in the appended claims, means that the soil removal index (SRI), calculated using the ASTM D4265-14 method, for a given laundry detergent formulation at a washing temperature of 10 °C is at least 95% (preferably at least 97%; more preferably at least 98%; most preferably at least 100%) of the soil removal index (SRI), calculated using the ASTM D4265-14 method, for the same laundry detergent formulation at a washing temperature of 30 °C.

[0016] Preferably, the liquid laundry detergent formulation of the present invention comprises a synergistic blend with low-temperature detergency, comprising: (a) a surfactant Petition 870250086943, dated 09 / 25 / 2025, page. 19 / 43 / 29 anionic selected from the group consisting of alkyl sulfates, alkylbenzenesulfates, alkylbenzenesulfonic acids, alkylbenzenesulfonates, alkyl polyethoxysulfates, paraffin sulfonic acids, paraffin sulfonates, olefin sulfonic acids, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonic acids, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxyalkane-1-sulfonates, beta-alkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid, salts thereof and mixtures thereof (preferably the anionic surfactant is selected from the group consisting of C8-20 alkylbenzene sulfates, C8-20 alkylbenzenesulfonic acids,C8-20 alkylbenzenesulfonates, C8-20 alkyl polyethoxy sulfates, paraffin sulfonic acids, paraffin sulfonates, alpha-olefin sulfonic acids, alpha-olefin sulfonates, fatty acid sulfonates, fatty acid ester sulfonates, oleic acid and mixtures thereof; more preferably, the anionic surfactant being selected from the group consisting of C12-16 alkylbenzenesulfonic acids, C12-16 alkylbenzenesulfonates, C12-16 alkyl polyethoxysulfates, C12-18 paraffin sulfonic acids, C12-18 paraffin sulfonates, oleic acid and mixtures thereof; more preferably, the anionic surfactant is selected from the group consisting of C12-16 alkylbenzenesulfonic acids, C12-16 alkylbenzenesulfonates, C12-16 alkyl polyethoxysulfates, oleic acid and mixtures thereof; more preferably, the anionic surfactant includes a mixture of dodecylbenzenesulfonic acid,(a) a non-ionic surfactant, sodium laureth-2 sulfate and oleic acid; most preferably, the anionic surfactant being a mixture of dodecylbenzene sulfonic acid, sodium laureth-2 sulfate and oleic acid); (b) a non-ionic surfactant, Petition 870250086943, dated 09 / 25 / 2025, p. 20 / 43 / 29 selected from the group of nonionic surfactants having the formula (I) R6-O-(EO)χ-(AO)y--(EO)zH (I) wherein R6 is a linear Cs-1s alkyl group (preferably a linear C10-1s alkyl group; more preferably a linear C12-14 alkyl group or a linear C16-18 alkyl group; where AO is an oxyalkylene group with 3 to 5 carbon atoms (preferably 3 to 4 carbon atoms; more preferably 3 carbon atoms); where x is 2 to 4 (preferably 4); where y is 6 to 25 (preferably 7 to 20; more preferably 8 to 15; most preferably 8 to 14); 4 to 40; most preferably 6 to 30; most preferably preference, sa 25); (II) where each R1 is independently a chain of Formula (III) (III) wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III) (preferably a C1-4 alkyl group and a chain of formula (III); more preferably a C1-2 alkyl group and a chain of formula (III); most preferably a methyl group); wherein R3 and R4 are independently an aliphatic C3-12 alkanediyl group (preferably an aliphatic C3-8 alkanediyl group; more preferably an aliphatic C3-4 alkanediyl group; most preferably a -CH2CH2CH2- group) (preferably, wherein R3 and R4 may be the same or different) (of Petition 870250086943, dated 09 / 25 / 2025, page 21 / 43 / 29 preference, wherein the aliphatic C3-12 alkanedi-yl groups may be linear or branched and may contain alicyclic groups); wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group (preferably, a hydrogen and a C1-3 alkyl group; more preferably, a hydrogen and a C1-2 alkyl group; most preferably, a hydrogen and a methyl group) (wherein, preferably, the R5 portions vary along the molecule with the different R5 portions being randomly dispersed along the molecule or distributed in blocks along the molecule); where n is an average of 0 to 8 (preferably 1 to 8; more preferably 1 to 4; even more preferably 1 to 2; most preferably 1); and where m is an average of 5 to 50; and wherein the cleaning enhancer has a weight-average molecular weight of < 10,000 Daltons (preferably 1,139 to 10,000 Daltons;with greater preference; 1,750 to 5,000 Daltons; with maximum preference, from 2,000 to 4,000 Daltons); and wherein the liquid laundry detergent formulation has a pH of 6.5 to 11 (preferably 7.5 to 10) (wherein, preferably, the liquid laundry detergent formulation additionally comprises water) (wherein, preferably, the formulated laundry detergent formulation comprises 5 to 95% by weight (preferably 10 to 80% by weight; more preferably 15 to 75% by weight; even more preferably 17 to 65% by weight; even more preferably 50 to 65% by weight; most preferably 55 to 60% by weight) based on the weight of the liquid laundry detergent formulation, of the anionic surfactant (a) plus the nonionic surfactant (b)) (wherein, preferably, the liquid laundry detergent formulation comprises 15 to 60% by weight (preferably 20 to 60% by weight) weight; preferably 25 to 50% by weight;with the highest preference, 25 to 45% by weight), based on the combined weight of the anionic surfactant (a) and the non-ionic surfactant (b), of the non-ionic surfactant (b)). Petition 870250086943, dated 09 / 25 / 2025, page 22 / 43 / 29

[0017] Preferably, the cleaning booster of formula (II) used in the synergistic low-temperature detergency blend of the present invention contains 90 to 99.5% by weight (more preferably 94 to 99% by weight; more preferably 95 to 98.5% by weight, based on the weight of the cleaning booster) of alkoxide groups. More preferably, the cleaning booster of formula (II) used in the synergistic low-temperature detergency blend of the present invention contains 90 to 99.5% by weight (more preferably 94 to 99% by weight; more preferably 95 to 98.5% by weight, based on the weight of the cleaning booster) of alkoxide groups; wherein the alkoxide groups are selected from the group consisting of -CH2CH2O- groups, -CH2CH(CH3)O- groups and groups CH2CH(CH2CH3)O-.More preferably, the cleaning booster of formula (II) used in the synergistic blend with low-temperature detergency of the present invention contains 90 to 99.5% by weight (more preferably 94 to 99% by weight; more preferably 95 to 98.5% by weight, based on the weight of the cleaning booster) of alkoxide groups; wherein the alkoxide groups are selected from the group consisting of CH2CH2O- groups (i.e., wherein R5 in formula (III) is a hydrogen) and CH2CH(CH3)O- groups (i.e., wherein R5 is a methyl group).Most preferably, the cleaning enhancer of formula (II) used in the synergistic blend with low-temperature detergency of the present invention contains 90 to 99.5% by weight (more preferably 94 to 99% by weight; more preferably 95 to 98.5% by weight, based on the weight of the cleaning enhancer) of alkoxide groups; wherein the alkoxide groups are selected from the group consisting of -CH2CH2O- groups (i.e., wherein R5 in formula (III) is a hydrogen) and -CH2CH(CH3)O- groups (i.e., wherein R5 is a methyl group); wherein < 70% by weight (preferably 10 to 65% by weight; more preferably 25 to 60% by weight) of the alkoxide groups are CH2CH(CH3)O- groups. Preferably, the molar ratio between -CH2CH2O- and -CH2CH(CH3)O- groups is 25 to 60% by weight. Petition 870250086943, dated 09 / 25 / 2025, page 23 / 43 / 29 groups -CH2CH(CHs)O- in the cleaning enhancer is > 0.9:1.

[0018] Preferably, the liquid laundry detergent formulation of the present invention further comprises a water-miscible organic solvent. More preferably, the liquid laundry detergent formulation of the present invention further comprises 0 to 40% by weight (preferably 2 to 40% by weight (more preferably 4 to 35% by weight; even more preferably 5 to 30% by weight; most preferably 5 to 25% by weight)) based on the weight of the liquid laundry detergent formulation, of a water-miscible organic solvent.Most preferably, the liquid laundry detergent formulation of the present invention further comprises 0 to 40% by weight (preferably 2 to 40% by weight (more preferably 4 to 35% by weight; even more preferably 5 to 30% by weight; most preferably 5 to 25% by weight)), based on the weight of the liquid laundry detergent formulation, of a water-miscible organic solvent; wherein the water-miscible organic solvent is selected from the group consisting of an alcohol with a hydroxyl group (e.g., ethanol); propylene glycol; glycerol; 1,3-butanediol; 1,3-hexanediol; dipropylene glycol and mixtures thereof (preferably ethanol, propylene glycol and mixtures thereof; most preferably propylene glycol).

[0019] Preferably, the liquid laundry detergent formulation of the present invention further optionally comprises providing an additive selected from the group consisting of a booster (for example, sodium bicarbonate, sodium carbonate, zeolites, sodium citrate, sodium tripolyphosphate and aminocarboxylates (such as methylglycine diacetic acid, sodium salt or glutamic acid and diacetic acid, sodium salt)); hydrotropes (for example, sodium xylene sulfonate, sodium cumene sulfonate, sodium toluene sulfonate); foam control agents (for example, Petition 870250086943, dated 09 / 25 / 2025, page 24 / 43 / 29 example, polydimethylsiloxane); enzymes (e.g., protease, cellulases, lipase, amylase, mannanases); preservatives; fragrances (e.g., essential oils such as D-limonene); fluorescent bleaching agents; bleach (e.g., sodium percarbonate, sodium perborate, sodium hypochlorite); dyes; additive polymers (e.g., dispersing polymers such as acrylic acid homopolymers and acrylic acid copolymers with maleic acid, sulfonated monomer and / or ethyl acrylate); fabric softeners (e.g., softening silicones, cationic coacervating polymers (e.g., cationic hydroxyalkylcellulose, polyquaternium polymers)); pH adjusters / buffers and mixtures thereof.

[0020] Preferably, the use of a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency for cleaning fabrics under cold washing conditions (preferably at washing temperatures < 15 °C; more preferably at washing temperatures < 10 °C); the synergistic blend with low-temperature detergency of the present invention comprises: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates,alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxyalkane-1-sulfonates, beta-alkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid, salts thereof and mixtures thereof (preferably the anionic surfactant is selected from the group consisting of C8-20 alkylbenzene sulfates, C8-20 alkylbenzenesulfonic acids, Petition 870250086943, dated 09 / 25 / 2025, page 25 / 43 / 29 C8-20 alkylbenzenesulfonates, C8-20 alkyl polyethoxy sulfates, paraffin sulfonic acids, paraffin sulfonates, alpha-olefin sulfonic acids, alpha-olefin sulfonates, fatty acid sulfonates, fatty acid ester sulfonates, oleic acid and mixtures thereof; more preferably, the anionic surfactant being selected from the group consisting of C12-16 alkylbenzenesulfonic acids, C12-16 alkylbenzenesulfonates, C12-16 alkyl polyethoxysulfates, C12-18 paraffin sulfonic acids, C12-18 paraffin sulfonates, oleic acid and mixtures thereof; with even greater preference, the anionic surfactant being selected from the group consisting of C12-16 alkylbenzenesulfonic acids, C12-16 alkylbenzenesulfonates, C12-16 alkyl polyethoxysulfates, oleic acid and mixtures thereof;with even greater preference, wherein the anionic surfactant includes a mixture of dodecylbenzene sulfonic acid, sodium laureth-2 sulfate and oleic acid; with the highest preference, wherein the anionic surfactant is a mixture of dodecylbenzene sulfonic acid, sodium laureth-2 sulfate and oleic acid); (b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I); R6-O-(EO) x -(AO)y--(EO) zH (I) where R6 is a linear C8-18 alkyl group (preferably a linear C10-18 alkyl group; more preferably a linear C12-14 alkyl group or a linear C16-18 alkyl group); where AO is an oxyalkylene group with 3 to 5 carbon atoms (preferably 3 to 4 carbon atoms; more preferably 3 carbon atoms); where x is 2 to 4 (preferably 4); where y is 6 to 25 (preferably 7 to 20; more preferably 8 to 15; most preferably 8 to 14); 25); and (c) a cleaning enhancer of formula (II) Petition 870250086943, dated 09 / 25 / 2025, p. 26 / 43 / 29L J(II) wherein each R1 is independently a chain of Formula (III) (III) wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III) (preferably a C1-4 alkyl group and a chain of formula (III); more preferably a C1-2 alkyl group and a chain of formula (III); most preferably a methyl group); wherein R3 and R4 are independently an aliphatic C3-12 alkanediyl group (preferably an aliphatic C3-8 alkanediyl group; more preferably an aliphatic C3-4 alkanediyl group; most preferably a -CH2CH2CH2- group) (preferably, wherein R3 and R4 may be the same or different) (preferably, wherein the aliphatic C3-12 alkanediyl groups may be linear or branched and may contain alicyclic groups);wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group (preferably a hydrogen and a C1-3 alkyl group; more preferably a hydrogen and a C1-2 alkyl group; most preferably a hydrogen and a methyl group) (preferably the R5 moieties vary along the molecule with the different R5 moieties being randomly dispersed along the molecule or distributed in blocks along the molecule); wherein n is an average of 0 to 8 (preferably 1 to 8; more preferably 1 to 4; even more preferably 1 to 2; most preferably 1); and wherein m is an average of 5 to 50; and wherein o; Petition 870250086943, dated 09 / 25 / 2025, page 27 / 43 / 29 cleaning enhancer has a weight-average molecular weight of < 10,000 Daltons (preferably 1,139 to 10,000 Daltons; more preferably 1,750 to 5,000 Daltons; most preferably 2,000 to 4,000 Daltons); and wherein the liquid laundry detergent formulation has a pH of 6.5 to 11 (preferably 7.5 to 10) (wherein, preferably, the liquid laundry detergent formulation additionally comprises water) (wherein, preferably, the formulated laundry detergent formulation comprises 5 to 95% by weight (preferably 10 to 80% by weight; more preferably 17 to 65% by weight; more preferably still 50 to 65% by weight);preferably 55 to 60% by weight) based on the weight of the liquid laundry detergent formulation, of the anionic surfactant (a) plus the non-ionic surfactant (b)) (whereas, preferably, the liquid laundry detergent formulation comprises 15 to 60% by weight (preferably 20 to 60% by weight; more preferably 25 to 50% by weight; most preferably 25 to 45% by weight), based on the combined weight of the anionic surfactant (a) and the non-ionic surfactant (b)).

[0021] Preferably, the method for washing a fabric article of the present invention comprises: providing a soiled fabric article (preferably, the soiled fabric article is soiled with oil and grease; more preferably, the soiled fabric article is soiled with tallow oils) (preferably, the soiled fabric article is stained cotton fabric; more preferably, the soiled fabric article is stained polycotton fabric); providing a liquid laundry detergent formulation of the present invention comprising a synergistic blend with low-temperature detergency; providing wash water at a temperature of < 15 °C (preferably, < 10 °C); and applying the wash water and the formulation to Petition 870250086943, dated 09 / 25 / 2025, page 28 / 43 / 29 liquid laundry detergent to the soiled fabric article to provide a clean fabric article. More preferably, the method for washing a fabric article of the present invention comprises: providing a soiled fabric article (preferably, the soiled fabric article is soiled with oil and grease; more preferably, the soiled fabric article is soiled with tallow oils) (preferably, the soiled fabric article is stained cotton fabric; more preferably, the soiled fabric article is stained polycotton fabric); providing a liquid laundry detergent formulation of the present invention comprising a synergistic blend with low-temperature detergency; providing wash water at a temperature of < 15 °C (preferably, < 10 °C); providing rinse water;Apply the wash water and liquid laundry detergent formulation to the soiled fabric to provide a clean fabric item; and then apply the rinse water to the clean fabric item to remove the formulated laundry detergent formulation from the clean fabric item.

[0022] Some embodiments of the present invention will be described in detail in the following Examples. Synthesis S1: L-Ci2-14-(EO)4--(PO)8-(EO)i2

[0023] A nonionic surfactant represented by the formula L-C12-14(EO)4-(PO)8-(EO)i2 was prepared, where “L-C12-14” is a linear C1214 alkyl moiety. One mole of L-C12-14 alcohol and a 45-50% by weight aqueous solution of potassium hydroxide were charged into a reactor. The potassium hydroxide charge was sufficient to provide a KOH concentration of 0.17% by weight, based on the weight of the polymeric product. The reactor contents were maintained at 50-60 °C for thirty minutes. The moisture content in the reactor vapor space was then reduced to less than 1,000 ppm by vacuum extraction at 80 °C. The temperature setpoint for the Petition 870250086943, dated 09 / 25 / 2025, page 29 / 43 / 29 The reactor contents were then raised to 110 °C. Subsequently, four molar equivalents of ethylene oxide, EO, based on the initial charge of LC12-14 alcohol, were slowly fed into the reactor while the temperature of the reactor contents was maintained at 110 to 140 °C. When the pressure in the reactor returned to approximately the same pressure as before the EO feed, fourteen molar equivalents of propylene oxide, PO, based on the initial charge of L-C12-14 alcohol, were slowly fed into the reactor while the temperature of the reactor contents was maintained at 110 to 140 °C. When the pressure in the reactor returned to approximately the same level as before the PO feed, twelve molar equivalents of EO, based on the initial charge of L-C12-14 alcohol, were slowly fed into the reactor while the temperature of the reactor contents was maintained at 110 to 140 °C.When the pressure in the reactor returned to approximately the same level as before the EO feed, the reactor contents were maintained at 110 to 140 °C for a further two hours to facilitate the complete EO reaction. The reactor was then purged with nitrogen and the reactor contents were cooled to 60 °C. Acetic acid was then added to the reactor contents to neutralize the potassium hydroxide. After the reactor contents were cooled to 40 °C, the product polymer was recovered. S2 to S9 syntheses

[0024] The procedure described in Synthesis S1 was repeated in Syntheses S2 to S9, with the alcohol used having an alkyl group as observed in Table 1 and the relative molar amounts of EO and PO were added at the various steps, as mentioned in Table 1. Table 1 Ex. R* Alkylene oxide blocks (mols) Generic Structure 1st EO block PO block 2nd EO block S1 L-C12-14 4 8 12 L-C12-14--(EO)4-(PO)8(EO)12 S2 L-C12-14 14 4 L-C12-14--(EO)4-(PO)12(EO)14 S3 L-C16-18 4 14 15 L-C16-18--(EO)4-(PO)14(EO)15 S4 L-C16-18 4 14 25 L-C16-18-(PO)(O)24(EO)24 Petition 870250086943, of 25 / 09 / 2025, p. 30 / 43 / 29 S5 L-C12-14 9 0 0 L-C12-14--(EO)9 S6 B-C8 0 5 9 B-C8-(PO)5-(EO)9 S7 L-C12-14 4 8 8 L-C12-14--(EO)4-(PO)8(EO)8 S8 L-C12-14 4 8 10 L-C12-14--(EO)4-(PO)8(EO)10 S9 L-C12-14 4 12 8 L-C12-14-(EO)4-(PO)12-(EO)8 * The L-alkyl group is a linear alcohol (R-OH) where R is a linear alkyl group with the number of carbons shown and the hydroxyl group (-OH) is attached to a primary carbon atom at the end of the alkyl chain. The B-alkyl group is a branched alcohol (R-OH) where R is a branched alkyl group with the shown number of carbons and the hydroxyl group (-OH) is attached to a primary carbon atom at the end of a branched alkyl chain. S10 Synthesis: Cleaning Enhancer

[0025] A cleaning enhancer was prepared using a pressure reactor. Propylene oxide (PO) and ethylene oxide (EO) were delivered separately using ISCO syringe pumps equipped with a robot-controlled needle and compressed gas microvalve. The pressure reactor was fitted with an insertable glass element and a removable stirring paddle. The reactor was initially subjected to drying in a vacuum oven at 125 °C.

[0026] Bis(3-aminopropyl)methylamine (14.5 g) and propylene oxide (17 g) were mixed in an autoclave and stirred at 140 °C for 8 hours. The resulting material was mixed with aqueous KOH (4 g, 45 wt% KOH) with subsequent removal of water. This mixture was propoxylated with propylene oxide (27.7 g) at 115 °C for 24 hours to form an intermediate with the approximate composition (diamine)(PO)8.

[0027] The intermediate obtained (diamine)(PO)8 containing approximately 3% by weight of KOH (0.567 mL) was charged into the reactor under nitrogen. The reactor was then sealed and charged with propylene oxide (1.496 mL). The temperature was increased to 115 °C and the reaction mixtures were stirred for 24 hours after reaching the process temperature. It was observed that the reactor pressure decreased and gradually stabilized at the end of the heating period, indicating that the reaction was complete. The reactor was cooled, vented, and purged with nitrogen. Then, the reactor was Petition 870250086943, dated 09 / 25 / 2025, page 31 / 43 / 29 heated to 130 °C and ethylene oxide (1.684 mL) was added to the reactor contents. The reactor contents were stirred at 130 °C for 4 hours. The pressure curve showed the completeness of the reaction. The synthesis produced a sample with a 33.7 / 32.7 mol / mol PO / EO ratio. After cooling, venting, and purging the reactor with nitrogen, a small sample was taken from the reactor for NMR and GPC analysis, with the results shown in Table 2. Table 2 Ex. mol / mol (diamine)(PO)8%, by weight Daltons EO PO EO PO Mw Mn S10 32.7 33.7 40.6 55.3 3,109 2,387 Comparative examples CF1 to CF8 and examples F1 to F4: Concentrated detergent

[0028] The concentrated laundry detergent formulations of Comparative Examples CF1 to CF8 and Examples F1 to F4 used in the cleaning tests in the subsequent Examples were prepared using the generic formulation described in Table 3. Water and propylene glycol were mixed in a beaker with mechanical stirring. Then, dodecylbenzene sulfonic acid, sodium lauryl ether-2 sulfate, oleic acid, and potassium hydroxide were added to the beaker under continuous stirring. The non-ionic surfactant (Synthesis S1 to S6 or Lutensol® XL-80) was then added to the beaker under continuous stirring. The pH was then adjusted to 8 to 8.5 with potassium hydroxide to form the concentrated laundry detergent. Comparative examples CF9 to CF18 and examples F5 to F10: Standard laundry detergent

[0029] The standard laundry detergent formulations from Comparative Examples CF9 to CF18 and Examples F5 to F10 used in the cleaning tests in the subsequent Examples were prepared with the formulation as described in Table 4. Then, water, dodecylbenzene sulfonic acid, and lauryl ether-2 sulfate were added to the beaker. Petition 870250086943, dated 09 / 25 / 2025, page 32 / 43 / 29 sodium, oleic acid and sodium hydroxide, with continuous stirring. The non-ionic surfactant (Synthesis S1, S3 to S9 or Lutensol® XL-80) and the cleaning enhancer, if any, were then added to the beaker with continuous stirring. The pH was then adjusted to 8 to 8.5 with potassium hydroxide to form the standard laundry detergent. Comparative examples CF19 to CF27 and examples F11 to F15: Unit dose detergent

[0030] The unit-dose laundry detergent formulations of Comparative Examples CF19 to CF27 and Examples F11 to F15 used in the cleaning tests in the subsequent Examples were prepared having the formulation as described in Table 5. Water and propylene glycol were mixed in a beaker with mechanical stirring. Dodecylbenzene sulfonic acid, ammonium lauryl ether-2 sulfate, oleic acid, and monoethanolamine were then added to the beaker with continuous stirring. The nonionic surfactant (Synthesis S1 to S6 or Lutensol® XL-80) was then added to the beaker with continuous stirring. The pH was then adjusted to 7.5 with monoethanolamine to form the concentrated laundry detergent. Low temperature detergency

[0031] The low-temperature detergency (LTD) of the laundry detergent formulations in Comparative Examples CF1 to CF27 and Examples F1 to F15 was evaluated using a Model TOM-52-A Terg-o-tometer available from SR Lab Instruments (6 wells of 1 L) agitated at 120 cycles per minute under the conditions mentioned below._________________________________________ Parameter Setting Temperature 10 C Water hardness 250 ppm, Ca2+ / Mg2+ = 2.04 / 1.67 Fabric types (3 in each well) Tallow fabric JB003 Stains Synthetic tallow, gum, pigment (available from the China Research Institute of Daily Chemical Industry) Petition 870250086943, dated 09 / 25 / 2025, page 33 / 43 / 29 Washing time: 20 minutes. Rinsing time: 2 minutes. Liquid laundry detergent dosage: 0.8 g / L (single-dose and concentrated detergents), 2 g / L (standard laundry detergent).

[0032] The soil removal (in %) was calculated for each of the laundry detergent formulations in Comparative Examples CF1 to CF27 and Examples F1 to F15 using the following formula: SR(%) = [(L*a - L*b) / (96 - L*b)] x 100% where SR(%) is the calculated dirt removal in %; where L*a is the L* value for a dry fabric sample measured by spectrophotometer (Konica Minolta CM-3600A Spectrophotometer) after washing; and where L*b is the L* value for a dry fabric sample measured by spectrophotometer before washing. The results are provided in Tables 3 to 5. Petition 870250086943, dated 09 / 25 / 2025, pp. 34 / 43 / 29 Table 3 Ingredient Examples (% by weight) CF1 CF2 CF3 CF4 CF5 CF6 CF7 CF8 F1 F2 F3 F4 25 / 09 / 2025. ;. 35 / 43 / 29 Petition 870250086943, dated 09 / 25 / 2025, pp. 36 / 43 / 29

Claims

1. Liquid laundry detergent formulation, characterized in that it comprises a synergistic blend with low-temperature detergency comprising: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxy-alkane-1-sulfonic acids, 2-acryloxy-alkane-1-sulfonates, beta-alkyloxyalkanesulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof;(b) a nonionic surfactant selected from the group of nonionic surfactants having formula (I) R6-O-(EO)x-(AO)-y--(EO)zH (I) where R6 is a linear Cs-is alkyl group; wherein AO is an oxyalkylene group with 3 to 5 carbon atoms; where x is from 2 to 4; where y is from 6 to 25; where z is from 1 to 50; and (c) a cleaning enhancer of formula (II) (II) wherein each R1 is independently a chain of Formula (III) Petition 870250086943, 2025 / 09 / 25, p. 38 / 43 2 / 5 (III) wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); where R3 and R4 are independently an aliphatic C3-12 alkanedi-yl group; wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; where n is an average of 0 to 8; where m is an average of 5 to 50; and with the cleaning enhancer having a weight-average molecular weight of <10,000 Daltons;and given that the formulation of liquid laundry detergent has a pH of 6.5 to 11; 2. Liquid laundry detergent formulation according to claim 1, characterized in that it additionally comprises water.

3. Liquid laundry detergent formulation according to claim 2, characterized in that AO is an oxyalkylene group with 3 carbon atoms; wherein the liquid laundry detergent formulation comprises from 5 to 95%, by weight, based on the weight of the liquid laundry detergent formulation, of the anionic surfactant (a) plus the nonionic surfactant (b).

4. Liquid laundry detergent formulation according to claim 3, characterized in that the liquid laundry detergent formulation comprises 15 to 60%, by weight, based on the combined weight of the anionic surfactant (a) and the nonionic surfactant (b).

5. Liquid laundry detergent formulation according to claim 6, the liquid laundry detergent formulation being characterized in that it additionally comprises a water-miscible organic solvent.

6. Liquid laundry detergent formulation according to claim 5, characterized in that it further comprises an optional additive selected from the group consisting of boosters; hydrotropes; foam control agent; enzymes; preservatives; fragrances; fluorescent whitening agents; bleach; dyes; polymer additives; fabric softeners; pH adjusters / buffers and mixtures thereof.

7. Use of a liquid laundry detergent formulation comprising a synergistic blend with low-temperature detergency, characterized in that it is intended for cleaning fabrics under cold washing conditions;the synergistic blend with low-temperature detergency comprises: (a) an anionic surfactant selected from the group consisting of alkyl sulfates, alkylbenzene sulfates, alkylbenzene sulfonates, alkyl polyethoxysulfates, paraffin sulfonates, olefin sulfonates, alpha-sulfocarboxylates, alpha-sulfocarboxylate esters, alkyl glyceryl ether sulfonates, alkyl glyceryl ether sulfonates, fatty acid sulfates, fatty acid sulfonates, fatty acid ester sulfonates, alkyl phenol polyethoxy ether sulfates, 2-acryloxyalkane-1-sulfonic acids, 2-acryloxyalkane-1-sulfonates, acid beta-alkyloxyalkanes sulfonic acid, beta-alkyloxyalkane sulfonates, oleic acid and mixtures thereof;(b) a nonionic surfactant selected from the group of nonionic surfactants having the formula (I) R6-O-(EO) x-(AO)y-—(EO) zH (I) where R6 is a linear Cs-is alkyl group; where x is from 2 to 4; wherein AO is an oxyalkylene group with 3 to 5 carbon atoms; wherein y Petition 870250086943, dated 09 / 25 / 2025, page 40 / 43 4 / 5 is from 6 to 25; wherein z is from 1 to 50; and wherein the nonionic surfactant is selected based on its ability to impart detergency stability to the laundry detergent formulation for cleaning water temperatures in the range of 10 to 30 °C; and (c) a cleaning enhancer of formula (II) (II) wherein each R1 is independently a chain of Formula (III) (III) wherein each R2 is independently selected from the group consisting of a C1-8 alkyl group and a chain of formula (III); wherein R3 and R4 are independently a C3-12 aliphatic alkanedi-yl group;wherein each R5 is independently selected from the group consisting of a hydrogen and a C1-4 alkyl group; wherein n is an average of 0 to 8; wherein m is an average of 5 to 50; and wherein the cleaning enhancer has a weight-average molecular weight of <10,000 Daltons; and wherein the liquid laundry detergent formulation has a pH of 6.5 to 11.

8. Method for washing a fabric article, characterized in that it comprises: providing a soiled fabric article; providing a liquid detergent formulation for washing clothes as defined in claim 1; providing wash water at a temperature < 15 °C; and applying the wash water and the liquid detergent formulation to the soiled fabric article to provide a clean fabric article.

9. Method according to claim 8, characterized in that the liquid laundry detergent formulation provided is as defined in claim 5.

10. Method according to claim 8, characterized in that the liquid laundry detergent formulation provided is as defined in claim 6.