Automatic dishwashing composition

Abstract

To provide an automatic dishwashing composition with improved grease suspension and shine, even at low temperatures, and improved drying properties.SOLUTION: An automatic dishwashing composition has a ternary mixture of non-ionic surfactants in a particular ratio including: i) a non-ionic surfactant having a high cloud point of 50°C or above; ii) a non-ionic surfactant having a low cloud point below 50°C; and iii) an ethylene oxide-propylene oxide block copolymer having a cloud point below 50°C.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention is in the field of automatic dishwashing. In particular, the present invention relates to a composition comprising a ternary mixture of nonionic surfactants. The composition of the present invention provides improved oily soil suspension and gloss, even at low temperatures, and also provides improved drying. [Background technology]

[0002] A trend in automatic dishwashing is to reduce the amount of energy required for the automatic dishwashing process. One way to reduce energy consumption is to use lower temperatures. There are challenges associated with using lower temperatures, especially with heavily soiled dishes with a high degree of grease. Grease at low temperatures can redeposit on dishes in the dishwasher, causing oil films and stains, and redeposit into the internal parts of the dishwasher, including the filter. Another challenge is that dishes may not be dry at the end of the process.

[0003] WO 2010 / 067054(A1) discloses a liquid composition comprising a nonionic surfactant mixture including a) a nonionic surfactant having a cloud point of 50° C. or higher, and b) a nonionic surfactant having a cloud point of less than 50° C., wherein the weight ratio of a) to b) is in the range of 2.25:1 to 1:1. Although this composition provides good drying properties, there is room for further improvement in the drying time. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2010 / 067054(A1) Summary of the Invention [Problem to be solved by the invention]

[0005] It is an object of the present invention to provide a composition which has improved oily soil suspension and gloss, even at low temperatures, and good drying properties. [Means for solving the problem]

[0006] According to a first aspect of the present invention, there is provided an automatic dishwashing composition. The composition comprises a ternary mixture of non-ionic surfactants. The ternary mixture comprises: (a) A nonionic surfactant having a high cloud point of 50° C. or more, wherein the high cloud point nonionic surfactant has a single alkoxylate type and is an alkoxylated C having 3 to 20 moles of alkylene oxide per mole of surfactant. 6~22 a high cloud point nonionic surfactant which is an alcohol nonionic surfactant; (b) a nonionic surfactant having a low cloud point of less than 50° C., wherein the low cloud point nonionic surfactant is an alkoxylated C alkoxylate having only two alkoxylate types selected from ethoxy, propoxy, and butoxy; 4~25 a low cloud point nonionic surfactant which is an alcohol nonionic surfactant; (c) an ethylene oxide-propylene oxide block copolymer having a cloud point less than 50° C., the ethylene oxide-propylene oxide block copolymer having the following structure: EOx1 POy1 EOx2(I) POy2 EOx3 POy3(II) wherein each of x1, x2, and x3 is in the range of about 1 to about 50, and each of y1, y2, and y3 is in the range of about 10 to about 70; and the weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) is at least about 1.2:1; The weight ratio of the low cloud point nonionic surfactant (b) to the ethylene oxide-propylene oxide block copolymer (c) is at least about 1.2:1.

[0007] The composition of the present invention can be used in the main wash or rinse in automatic dishwashing.The composition can be part of the main wash detergent or rinse aid, or can be added separately from an automatic dispenser to either the main wash, rinse, or both.The composition can be delivered from an automatic dispenser.The composition can be dispensed from a dishwashing dispenser in unit dose form, or from a rinse aid reservoir in the form of a rinse aid.

[0008] According to further aspects of the present invention there is provided a method of automatic dishwashing and the use of the composition of the present invention to provide greasy soil suspension and drying properties.

[0009] The elements of the first aspect of the invention apply to the other aspects of the invention mutatis mutandis. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The present invention includes an automatic dishwashing composition comprising a three-component mixture of nonionic surfactants.The present invention also includes the use of the method and composition to provide good oily soil suspension and gloss, and good drying, even at low temperatures.The method is preferably carried out in a domestic dishwashing machine.

[0011] Automatic dishwashing machines can be of domestic or commercial / institutional machine type. In general, the differences concern the size, throughput, and length of time of the dishwashing process. This can mean that the machines are designed in a very different manner. Industrial / institutional machines often have cycles that are much shorter but more energy intensive (e.g., at higher temperatures) and / or use much stronger chemicals than domestic machines. Enzymes are usually not used in these industrial / institutional machines because these enzymes require a certain contact time with the treated soil to function effectively, and commercial cycle times are too short. In the case of commercial dishwashing machines, the machine can be based on a conveyor system where the dishes move through a single or multiple tanks of the dishwasher, while in domestic machines the dishes generally always remain stationary in one tank inside the dishwasher and all the washing steps are performed in that single tank. In domestic dishwashing, it is conventional to include bleach and enzymes in the detergent.

[0012] As used herein, the term "automatic dishwashing detergent composition" means a dishwashing composition used in a dishwashing machine.

[0013] By "dishware" herein is meant cookware, dishes and tableware, i.e., all items associated with the preparation and serving of food and drink that are normally washed in a dishwasher.

[0014] As used herein, articles including "a" and "an" are understood to mean one or more of what is claimed or described. Unless otherwise noted, all component or composition levels refer to the active portion of that component or composition and exclude impurities, such as residual solvents or by-products, that may be present in commercial sources of such components or compositions. Unless specifically stated or the context requires otherwise, the embodiments described herein apply equally to all aspects of the invention. Percentages listed are by weight unless specifically stated or the context requires otherwise.

[0015] Unless otherwise stated, all measurements are performed at 25°C.

[0016] Three-component surfactant mixture The composition comprises a ternary mixture of nonionic surfactants, the ternary mixture comprising: (a) A nonionic surfactant having a high cloud point of 50° C. or more, wherein the high cloud point nonionic surfactant has a single alkoxylate type and is an alkoxylated C having 3 to 20 moles of alkylene oxide per mole of surfactant. 6~22 a high cloud point nonionic surfactant which is an alcohol nonionic surfactant; (b) a nonionic surfactant having a low cloud point of less than 50° C., wherein the low cloud point nonionic surfactant is an alkoxylated C alkoxylate having only two alkoxylate types selected from ethoxy, propoxy, and butoxy; 4~25 a low cloud point nonionic surfactant which is an alcohol nonionic surfactant; (c) an ethylene oxide-propylene oxide block copolymer having a cloud point of less than 50° C., preferably less than 40° C., the ethylene oxide-propylene oxide block copolymer having the following structure: EOx1 POy1 EOx2(I) POy2 EOx3 POy3(II) wherein each of x1, x2, and x3 is in the range of about 1 to about 50, and each of y1, y2, and y3 is in the range of about 10 to about 70; and the weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) is at least about 1.2:1; The weight ratio of the low cloud point nonionic surfactant (b) to the ethylene oxide-propylene oxide block copolymer (c) is at least about 1.2:1.

[0017] Preferably, the weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) is at least about 1.3:1, or at least about 1.4:1, or at least about 1.5:1, or at least about 1.6:1, or at least about 1.7:1, or at least about 1.8:1, or at least about 1.9:1, or at least about 2.0:1, or at least about 2.1:1, or at least about 2.2:1, or at least about 2.3:1, or at least about 2.4:1, or at least about 2.5:1, or at least about 2.6:1, or at least about 2.7:1, or at least about 2.8:1, or at least about 2.9:1, or at least about 3.0:1. Preferably, the weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) is at least about 1.2:1 to 20:1, or at least about 1.5:1 to 15:1, or at least about 2.0:1 to 10:1.

[0018] Preferably, the weight ratio of the low cloud point nonionic surfactant (b) to the ethylene oxide-propylene oxide block copolymer (c) is at least about 1.3:1, or at least about 1.4:1, or at least about 1.5:1, or at least about 1.6:1, or at least about 1.7:1, or at least about 1.8:1, or at least about 1.9:1, or at least about 2.0:1, or at least about 2.1:1, or at least about 2.2:1, or at least about 2.3:1, or at least about 2.4:1, or at least about 2.5:1, or at least about 2.6:1, or at least about 2.7:1, or at least about 2.8:1, or at least about 2.9:1, or at least about 3.0:1. Preferably, the weight ratio of the low cloud point nonionic surfactant (b) to the ethylene oxide-propylene oxide block copolymer (c) is at least about 1.2:1 to 20:1, or at least about 1.5:1 to 15:1, or at least about 2.0:1 to 10:1.

[0019] The ternary mixture of nonionic surfactants contained in the compositions according to the invention is described below and it has been found that compositions containing this mixture exhibit good greasy soil suspension even at low temperatures and drying properties, especially on items treated in a dishwashing run.

[0020] The composition of the present invention comprises a ternary surfactant mixture comprising a) a nonionic surfactant having a cloud point of 50° C. or higher (herein referred to as a "high cloud point nonionic surfactant") and b) a nonionic surfactant having a cloud point of less than 50° C. (herein referred to as a "low cloud point nonionic surfactant"), the weight ratio of a) to b) preferably ranging from 2:1 to 1:2. The ternary surfactant mixture further comprises an ethylene oxide-propylene oxide triblock copolymer having a cloud point of less than 50° C., preferably less than 40° C.

[0021] The cloud point is the temperature at which the nonionic surfactant solution phase separates into a water-rich phase and a surfactant-rich phase and becomes turbid. The cloud point temperature can be determined visually by identifying the temperature at which clouding occurs.

[0022] The cloud point temperature of a nonionic surfactant can be determined as follows: A solution containing 1% of the corresponding surfactant by weight of the solution is prepared in distilled water. The solution is gently stirred before analysis to allow the process to occur at chemical equilibrium. The phase inversion temperature is measured in a thermostable bath by immersing the surfactant solution in a 75 mm sealed glass test tube. To ensure no leakage, the test tube is weighed before and after measuring the cloud point temperature. The temperature is gradually increased at a rate of less than 1°C / min until it reaches a few degrees below the pre-estimated cloud point temperature. The cloud point temperature is determined visually at the first sign of turbidity.

[0023] The cloud point of the high cloud point nonionic surfactant is preferably in the range of 55° C. to 85° C., more preferably 60° C. to 80° C. The cloud point of the low cloud point nonionic surfactant is preferably in the range of 5° C. to 45° C., more preferably 8° C. to 35° C.

[0024] It is most preferred in accordance with the present invention that the high cloud point nonionic surfactant has a cloud point in the range of 60° C. to 80° C. and the low cloud point nonionic surfactant has a cloud point in the range of 8° C. to 35° C. In accordance with the present invention, particularly good results have been achieved with compositions comprising a nonionic surfactant mixture, where the high cloud point nonionic surfactant is an alkoxylated nonionic surfactant having a single alkoxylate type and the low cloud point nonionic surfactant is an alkoxylated nonionic surfactant having at least two alkoxylate types.

[0025] High cloud point alkoxylated nonionic surfactants can be prepared by reaction of monohydroxyalkanols or alkylphenols having 6 to 22 carbon atoms, preferably 8 to 20 carbon atoms, most preferably 10 to 18 carbon atoms. The alkoxylate surfactant types are preferably ethoxylate, butoxylate or propoxylate, with ethoxylate being particularly preferred. The high cloud point surfactants preferably have 3 to 20 moles, particularly preferably 4 to 10 moles, even more preferably 5 to 8 moles of alkylene oxide, especially ethylene oxide, per mole of alcohol or alkylphenol. Particularly preferred high cloud point nonionic surfactants are C10 to C15 with 5 to 10 EOs, more preferably C13 with 7 EOs. The high cloud point nonionic surfactants can be prepared from any of the above types of branched or linear fatty alcohols.

[0026] Preferred examples of high cloud point nonionic surfactants are Lutensol TO7 (BASF), Marlipal O13 / 70 (Sasol), Imbentin-T / 070 (Kolb), Emuldac AS-11 (Sasol) and Emuldac AS-20 (Sasol).

[0027] Low cloud point alkoxylated nonionic surfactants can be prepared by reaction of monohydroxyalkanols or alkylphenols having 4 to 25 carbon atoms, preferably 6 to 20 carbon atoms, most preferably 8 to 14 carbon atoms. The low cloud point surfactants preferably have a total of 2 to 45 moles of alkylene oxide per mole of surfactant. The type of alkoxylate in the low cloud point surfactant is preferably a mixture of at least two of ethoxylates, butoxylates and / or propoxylates, with a mixture of ethoxylates and propoxylates being particularly preferred. The low cloud point surfactants preferably have 2 to 25 moles, especially 5 to 20 moles of ethylene oxide per mole of alcohol or alkylphenol, and 2 to 40 moles, more preferably 5 to 30 moles of propylene oxide per mole of alcohol or alkylphenol. Mixtures of butylene oxide or propylene oxide are also possible. Particularly preferred low cloud point surfactants are C10-C12 with 10 to 20 EO and 10 to 20 PO. Low cloud point nonionic surfactants can be prepared from either branched or straight chain fatty alcohols of the types described above.

[0028] The low cloud point surfactants may also include surfactants which are ethoxylated and butoxylated monohydroxyalkanols or alkylphenols further comprising polyoxyethylene-polyoxypropylene block copolymer units, the alcohol or alkylphenol portion of such surfactants comprising more than 30% by weight, preferably more than 50% by weight, more preferably more than 70% by weight of the total molecular weight of the nonionic surfactant.

[0029] Preferred examples of low cloud point nonionic surfactants are Plurafac SLF-180 (BASF) and Ecosurf LFE-1410 (Dow). Another preferred low cloud point nonionic surfactant is LF224. Combinations of low cloud point nonionic surfactants can also be used, such as a combination of SLF180 and LF224.

[0030] Low cloud point surfactants are generally more hydrophobic than high cloud point surfactants, and the amounts and types of the two surfactants in the claimed mixture are preferably selected to control the foaming properties of the composition within the desired range. In automatic dishwashing applications, low foaming properties are usually desired.

[0031] In accordance with the present invention, it is particularly preferred that the high cloud point nonionic surfactant is an ethoxylated nonionic surfactant and the low cloud point nonionic surfactant is a mixed propoxylated-ethoxylated-propoxylated nonionic surfactant.

[0032] The weight ratio of the high cloud point nonionic surfactant to the low cloud point nonionic surfactant is preferably in the range of 2:1 to 1:2, more preferably 1.5:1 to 1:1.5.

[0033] For compositions intended for use in the main wash of an automatic dishwashing program, the amount of the non-ionic ternary surfactant mixture is from 0.5 to 20% by weight of the composition. For compositions intended for use in the rinse of an automatic dishwashing program, the amount of the non-ionic ternary surfactant mixture is from 0.5 to 40% by weight of the composition.

[0034] Ethylene oxide-propylene oxide block copolymer Ethylene oxide-propylene oxide block copolymers are triblock copolymers and have the following structure: EOx1 POy1 EOx2(I) POy2 EOx3 POy3(II) (wherein each of x1, x2, and x3 is in the range of about 1 to about 50, and each of y1, y2, and y3 is in the range of about 10 to about 70).

[0035] The ethylene oxide-propylene oxide-ethylene oxide triblock copolymers of formula I preferably have an average propylene oxide chain length of from 10 to 70, preferably from 20 to 60, more preferably from 25 to 55 propylene oxide units.

[0036] The ethylene oxide-propylene oxide-ethylene oxide triblock copolymers of formula II preferably have an average ethylene oxide chain length of from 1 to 50, preferably from 2 to 40, more preferably from 3 to 30 ethylene oxide units.

[0037] The ethylene oxide-propylene oxide triblock copolymers of Formula I and Formula II have a cloud point of less than 50°C, preferably less than 40°C.

[0038] Preferably, the ethylene oxide-propylene oxide triblock copolymers of Formula I and Formula II have a weight average molecular weight of about 1000 to about 10,000 daltons, preferably about 1200 to about 8000 daltons, more preferably about 1500 to about 7000 daltons, even more preferably about 1750 to about 5000 daltons, and most preferably about 2000 to about 4000 daltons.

[0039] Suitable ethylene oxide-propylene oxide triblock copolymers are commercially available from BASF in their Pluronic PE and Pluronic RPE series or from Dow Chemical in their Tergitol L series. Particularly suitable materials are Pluronic PE 9200, Tergitol L81, Tergitol L62, Tergitol L61, Pluronic RPE 3110 and Pluronic RPE 2520.

[0040] The composition of the present invention can be a cleaning composition that is preferably free of phosphates.The composition is preferably free of anionic and cationic surfactants.The composition comprises a surfactant ternary mixture, and optionally but preferably comprises a complexing agent, a dispersant polymer, a bleaching agent, an inorganic builder (preferably carbonate and / or silicate), an enzyme, especially a protease and amylase enzyme, a glass care agent, a metal care agent, etc.

[0041] When the composition of the invention is a cleaning composition, it preferably has a pH of at least 10, more preferably at least 10.5, when measured in a 1% by weight aqueous solution in distilled water at 20°C.

[0042] Complexing Agent Complexing agents are substances capable of sequestering hardness ions, especially calcium and / or magnesium.

[0043] The compositions of the present invention may preferably comprise from 10% to 60%, preferably from 20% to 40%, more preferably from 20% to 35% by weight of the composition of a complexing agent selected from the group consisting of methylglycine-N,N-diacetate (MGDA), glutamic acid-N,N-diacetate (GLDA), iminodisuccinic acid (IDS), citric acid, aspartic acid-N,N-diacetate (ASDA), salts thereof and mixtures thereof. Particularly preferred complexing agents for use herein are salts of MGDA, in particular the trisodium salt of MGDA. A mixture of the citrate salt and the trisodium salt of MGDA is also preferred for use herein. Preferably, the compositions of the present invention comprise from 15% to 40% by weight of the composition of the trisodium salt of MGDA.

[0044] Inorganic Builders The compositions of the present invention preferably comprise an inorganic builder. Suitable inorganic builders are selected from the group consisting of carbonates, silicates and mixtures thereof. Sodium carbonate and sodium silicate are particularly preferred for use herein. Preferably, the compositions of the present invention comprise 5 to 50% by weight of the composition of sodium carbonate, more preferably 10 to 40% by weight, especially 15 to 30% by weight.

[0045] polymer When present, the polymers are used in any suitable amount from about 0.1% to about 30%, preferably 0.5% to about 20%, more preferably 1% to 15% by weight of the composition. Sulfonated / carboxylated polymers are particularly suitable for the compositions of the present invention.

[0046] Suitable sulfonated / carboxylated polymers described herein may have a weight average molecular weight of about 100,000 Da or less, or about 75,000 Da or less, or about 50,000 Da or less, or from about 3,000 Da to about 50,000 Da, preferably from about 5,000 Da to about 45,000 Da.

[0047] Preferred sulfonated monomers include one or more of 1-acrylamido-1-propanesulfonic acid, 2-acrylamido-2-propanesulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3-methacrylamido-2-hydroxy-propanesulfonic acid, allylsulfonic acid, methallyl sulfonic acid, allyloxybenzenesulfonic acid, methallyloxybenzenesulfonic acid, 2-hydroxy-3-(2-propenyloxy)propanesulfonic acid, 2-methyl-2-propene-1-sulfonic acid, styrenesulfonic acid, vinylsulfonic acid, 3-sulfopropyl, 3-sulfo-propyl methacrylate, sulfomethacrylamide, sulfomethylmethacrylamide, and mixtures of the aforementioned acids or water-soluble salts thereof.

[0048] Preferably, the polymer comprises the following concentrations of monomers: from about 40 to about 90% by weight of the polymer, preferably from about 60 to about 90% by weight of one or more carboxylic acid monomers, from about 5 to about 50% by weight of the polymer, preferably from about 10 to about 40% by weight of one or more sulfonic acid monomers, and optionally from about 1% to about 30% by weight of the polymer, preferably from about 2 to about 20% by weight of one or more non-ionic monomers. Particularly preferred polymers comprise from about 70% to about 80% by weight of the polymer of at least one carboxylic acid monomer and from about 20% to about 30% by weight of the polymer of at least one sulfonic acid monomer.

[0049] In the polymer, all or some of the carboxylic or sulfonic acid groups may be present in neutralized form, i.e. the acidic hydrogen atoms of the carboxylic and / or sulfonic acid groups in some or all of the acidic groups may be replaced by metal ions, preferably alkali metal ions, in particular sodium ions.

[0050] The carboxylic acid is preferably (meth)acrylic acid. The sulfonic acid monomer is preferably 2-acrylamido-2-propanesulfonic acid (AMPS).

[0051] Preferred commercially available polymers include Alcosperse 240 and Aquatreat AR 540 supplied by Nouryon; Acumer 3100, Acumer 2000, Acusol 587G and Acusol 588G supplied by Dow. Particularly preferred polymers are Acusol 587G and Acusol 588G supplied by Dow.

[0052] Suitable polymers include low molecular weight anionic carboxylic acid polymers. They may be homopolymers or copolymers having a weight average molecular weight of about 200,000 g / mol or less, or about 75,000 g / mol or less, or about 50,000 g / mol or less, or about 3,000 g / mol to about 50,000 g / mol, preferably about 5,000 g / mol to about 45,000 g / mol. The dispersant polymer may be a low molecular weight homopolymer of polyacrylate having an average molecular weight of 1,000 to 20,000, particularly 2,000 to 10,000, and particularly preferably 3,000 to 5,000.

[0053] The polymers may be copolymers of acrylic acid and methacrylic acid, copolymers of acrylic acid and / or methacrylic acid and maleic acid and copolymers of acrylic acid and / or methacrylic acid and fumaric acid having a molecular weight of less than 70,000, their molecular weight being in the range of 2,000 to 80,000 g / mol, more preferably 20,000 to 50,000 g / mol, in particular 30,000 to 40,000 g / mol, and the ratio of (meth)acrylate to maleate or fumarate segments is 30:1 to 1:2.

[0054] The polymer may be a copolymer of acrylamide and acrylate having a molecular weight of 3,000 to 100,000, alternatively 4,000 to 20,000, and an acrylamide content of less than 50%, alternatively less than 20%, by weight of the dispersant polymer may also be used. Alternatively, such a polymer may have a molecular weight of 4,000 to 20,000, and an acrylamide content of 0% to 15% by weight of the polymer.

[0055] Suitable polymers herein also include itaconic acid homopolymers and copolymers. Alternatively, the polymer may be selected from the group consisting of alkoxylated polyalkyleneimines, alkoxylated polycarboxylates, polyethylene glycols, styrene copolymers, cellulose sulfate esters, carboxylated polysaccharides, amphiphilic graft copolymers, and mixtures thereof.

[0056] enzyme The composition of the present invention preferably comprises enzymes, more preferably amylases and proteases.

[0057] In describing the enzyme variants herein, the following nomenclature is used for ease of reference: original amino acid:position:substitute amino acid. Standard enzyme IUPAC one-letter codes for amino acids are used.

[0058] Proteases Suitable proteases include serine proteases, such as metalloproteases and neutral or alkaline microbial serine proteases, e.g., subtilisin (EC 3.4.21.62), and chemically or genetically modified mutants thereof. Suitable proteases include subtilisin (EC 3.4.21.62), such as those from the genus Bacillus, e.g., Bacillus lentus, B.alkalophilus, B.subtilis, B.amyloliquefaciens, Bacillus pumilus, and Bacillus gibsonii.

[0059] Particularly preferred proteases are polypeptides exhibiting at least 90%, preferably at least 95%, more preferably at least 98%, even more preferably at least 99%, especially 100% identity to the wild-type enzyme from Bacillus lentus, which comprises mutations at one or more, preferably two or more, more preferably three or more of the following positions, using the BPN numbering system and amino acid abbreviations as set out in WO 00 / 37627, which are incorporated herein by reference: V68A, N87S, S99D, S99SD, S99A, S101G, S101M, S103A, V104N / I, G118V, G118R, S128L, P129Q, S130A, Y167A, R170S, A194P, V205I and / or M222S.

[0060] Most preferably, the protease is selected from the group comprising the following mutations (BPN numbering system) relative to either PB92 wild type (SEQ ID NO: 2 of WO 08 / 010925) or subtilisin 309 wild type (sequence according to the PB92 backbone but including the natural mutation of N87S): (i) G118V+S128L+P129Q+S130A (ii)S101M+G118V+S128L+P129Q+S130A (iii)N76D+N87R+G118R+S128L+P129Q+S130A+S188D+N248R (iv)N76D+N87R+G118R+S128L+P129Q+S130A+S188D+V244R (v)N76D+N87R+G118R+S128L+P129Q+S130A (vi) V68A+N87S+S101G+V104N

[0061] Suitable commercially available protease enzymes include those sold under the trade names Savinase®, Polarzyme®, Kannase®, Ovozyme®, Everlase® and Esperase® by Novozymes A / S (Denmark), those sold under the trade names Properase®, Purafect®, Purafect Prime®, Purafect Ox®, FN3®, FN4®, Excellase®, Ultimase® and Purafect OXP® by Genencor International, those sold under the trade names Opticlean® and Optimase® by Solvay Enzymes, and those available from Henkel / Kemira, i.e. BLAP.

[0062] A preferred concentration of the protease in the second composition comprises from about 0.2 to about 2 mg of active protease per gram of composition.

[0063] amylase The composition of the invention may comprise an amylase. Preferred alkaline amylases are derived from Bacillus species, such as Bacillus licheniformis, Bacillus amyloliquefaciens, Bacillus stearothermophilus, Bacillus subtilis, or other Bacillus species, such as Bacillus species NCIB 12289, NCIB 12512, NCIB 12513, DSM 9375 (U.S. Pat. No. 7,153,818), DSM 12368, DSMZ no. 12649, KSM AP1378 (WO 97 / 00324), KSM K36 or KSM K38 (EP 1,022,334). Preferred amylases include: (a) variants described in U.S. Pat. No. 5,856,164 and WO 99 / 23211, WO 96 / 23873, WO 00 / 60060 and WO 06 / 002643, in particular variants having one or more substitutions at the following positions relative to AA560 SEQ ID NO:3: 9, 26, 30, 33, 82, 37, 106, 118, 128, 133, 149, 150, 160, 178, 182, 186, 193, 195, 202, 214, 231, 256, 257, 258, 269, 270, 272, 283, 295, 296, 298, 299, 303, 304, 305, 311, 314, 315, 318, 319, 320, 323, 339, 345, 361, 378, 383, 419, 421, 437, 441, 444, 445, 446, 447, 450, 458, 461, 471, 482, 484, preferably D183 * and G184 * Mutants that also contain deletions of (b) variants exhibiting at least 95% identity to the wild-type enzyme from Bacillus sp. 707 (SEQ ID NO: 7 in U.S. Pat. No. 6,093,562), in particular those comprising one or more of the following mutations: M202, M208, S255, R172 and / or M261. Preferably, the amylase comprises one of the M202L or M202T mutations.

[0064] Suitable commercially available α-amylases include DURAMYL®, LIQUEZYME®, TERMAMYL®, TERMAMYL ULTRA®, NATALASE®, EVEREST®, SUPRAMYL®, STAINZYME®, STAINZYME PLUS®, FUNGAMYL® and BAN® (Novozymes A / S, Bagsvaerd, Denmark), KEMZYM® AT 9000 (Biozym Biotech Trading GmbH Wehlistrasse 27b A-1200 Wien Austria), RAPIDASE®, PURASTAR®, ENZYSIZE®, OPTISIZE HT PLUS®, POWERASE®, EXCELLENZ™ S 1000 and EXCELLENZ™ S. and PURASTAR OXAM® (DuPont Industrial Biosciences, Palo Alto, California); and KAM® (Kao Corporation, 1-14-10 Nihonbashi Kayabacho, Chuo-ku, Tokyo 103-8210, Japan). Particularly preferred amylases for use herein include NATALASE®, STAINZYME®, STAINZYME PLUS®, EXCELLENZ® S 1000, EXCELLENZ® S2000, and mixtures thereof.

[0065] Preferably, the composition of the present invention contains at least 0.005 mg, preferably about 0.0025 to about 0.025 mg, more preferably about 0.05 to about 0.3 mg, especially about 0.01 to about 0.25 mg of active amylase.

[0066] Preferably, the protease and / or amylase of the composition is in the form of a granule, the granule containing more than 29% sodium sulfate by weight of the granule, and / or the sodium sulfate and the active enzyme (protease and / or amylase) are in a weight ratio of 3:1 to 100:1, or preferably 4:1 to 30:1, or more preferably 5:1 to 20:1.

[0067] Crystal Growth Inhibitors Crystal growth inhibitors are materials that can bind to calcium carbonate crystals and prevent the further growth of species such as aragonite and calcite.

[0068] A particularly preferred crystal growth inhibitor for use herein is HEDP (1-hydroxyethylidene 1,1-diphosphonic acid).The compositions of the invention preferably contain from 0.01 to 5%, more preferably from 0.05 to 3%, especially from 0.5 to 2% by weight of the composition of a crystal growth inhibitor, preferably HEDP.

[0069] Bleach The compositions of the present invention may comprise from about 8 to about 30%, more preferably from about 9 to about 25%, and even more preferably from about 9 to about 20% by weight of the composition of a bleaching agent.

[0070] Inorganic and organic bleaching agents are suitable for use herein. Inorganic bleaching agents include perhydrated salts such as perborates, percarbonates, persulfates and persilicates. Inorganic perhydrated salts are usually alkali metal salts. Inorganic perhydrated salts can be included as crystalline solids without additional protection. Alternatively, the salts can be coated. Suitable coatings include sodium sulfate, sodium carbonate, sodium silicate and mixtures thereof. The coatings can be applied as a mixture applied to the surface or applied in sequential layers.

[0071] Alkali metal percarbonates, especially sodium percarbonate, are the preferred bleaching agents for use herein. The percarbonate is most preferably incorporated into the product in a coated form which provides in-product stability.

[0072] Potassium monopersulfate peroxide is another inorganic perhydrate salt useful herein.

[0073] Typical organic bleaching agents are organic peroxyacids, especially dodecane diperoxyacid, tetradecane diperoxyacid, and hexadecanediperoxyacid. Mono- and diperazelaic acid, mono- and diperbrassylic acid are also suitable herein. Diacyl and tetraacyl peroxides, such as dibenzoyl peroxide and dilauroyl peroxide, are other organic peroxides that can be used in the context of the present invention.

[0074] Further typical organic bleaching agents include peroxyacids, specific examples being the alkylperoxyacids and arylperoxyacids. Preferred representatives are: (a) peroxybenzoic acid and its ring-substituted derivatives, such as alkylperoxybenzoic acids, as well as peroxy-α-naphthoic acid and magnesium monoperphthalate; (b) aliphatic or substituted aliphatic peroxyacids, such as peroxylauric acid, peroxystearic acid, ε-phthalimidoperoxycaproic acid [phthaloiminoperoxyhexanoic acid (PAP)], o-carboxybenzamidoperoxycaproic acid, N-nonenylamidoperadipic acid and N-nonenylamidopersuccinate; and (c) aliphatic and araliphatic peroxydicarboxylic acids, such as 1,12-diperoxycarboxylic acid, 1,9-diperoxyazelaic acid, diperoxysebacic acid, diperoxybrassylic acid, diperoxyphthalic acid, 2-decyldiperoxybutane-1,4-dioic acid, N,N-terephthaloyldi(6-aminopercaproic acid).

[0075] bleach activator Bleach activators are typically organic peracid precursors that enhance bleaching action during washing at temperatures up to 60° C. Bleach activators suitable for use herein include compounds which, under perhydrolysis conditions, give aliphatic peroxoycarboxylic acids, preferably having 1 to 12 carbon atoms, especially 2 to 10 carbon atoms, and / or optionally substituted perbenzoic acids. Suitable materials have O-acyl and / or N-acyl groups with the number of carbon atoms specified and / or optionally substituted benzoyl groups. Also preferred are polyacylated alkylenediamines, in particular tetraacetylethylenediamine (TAED), acylated triazine derivatives, in particular 1,5-diacetyl-2,4-dioxohexahydro-1,3,5-triazine (DADHT), acylated glycolurils, in particular tetraacetylglycoluril (TAGU), N-acylimides, in particular N-nonanoylsuccinimide (NOSI), acylated phenolsulfonates, in particular n-nonanoyl- or isononanoyloxybenzenesulfonate (n- or iso-NOBS), decanoyloxybenzoic acid (DOBA), carboxylic anhydrides, in particular phthalic anhydride, acylated polyhydric alcohols, in particular triacetin, ethylene glycol diacetate and 2,5-diacetoxy-2,5-dihydrofuran, as well as triethylacetyl citrate (TEAC). When present, the composition of the invention comprises from 0.01 to 5% by weight of the composition, preferably from 0.2 to 2% by weight. of a bleach activator, preferably TAED.

[0076] Bleaching catalyst The compositions of the present invention may contain a bleach catalyst, preferably a metal-containing bleach catalyst. More preferably, the metal-containing bleach catalyst is a transition metal-containing bleach catalyst, especially a manganese or cobalt-containing bleach catalyst.

[0077] Preferred bleach catalysts for use herein include manganese triazacyclononane and related complexes, Co, Cu, Mn, and Fe bispyridylamines and related complexes, and cobalt(III) pentammine acetate and related complexes.

[0078] The composition may comprise from 0.001 to 0.5%, more preferably from 0.002 to 0.05%, by weight of the composition of a bleach catalyst. Preferably the bleach catalyst is a manganese bleach catalyst.

[0079] Metal Care Agent The metal care agent can prevent or reduce tarnishing, corrosion or oxidation of metals including aluminum, stainless steel, and non-ferrous metals such as silver and copper. Preferably, the composition of the present invention comprises 0.1-5% by weight of the composition, more preferably 0.2-4% by weight, especially 0.3-3% by weight of the metal care agent, and preferably the metal care agent is benzotriazole (BTA).

[0080] Glass care products Glasscare agents protect the appearance of glassware during the dishwashing process. Preferably, the composition of the invention comprises 0.1 to 5%, more preferably 0.2 to 4%, especially 0.3 to 3% by weight of the composition of a glasscare agent, preferably the glasscare agent is a zinc salt.

[0081] The composition of the present invention may preferably be a rinse aid comprising a non-ionic ternary mixture and optionally hydrotropes, fragrances, complexing agents, glass care agents, metal care agents, etc. Such ingredients are preferably present in an amount of 5% by weight or less of the present invention. When the composition of the present invention is a rinse aid, the composition preferably has a pH of less than 8, more preferably less than 7.5, when measured in a 1% w / v aqueous solution in distilled water at 20°C.

[0082] Preferably, the cleaning composition of the present invention comprises: i) 5 to 50% by weight of the composition of a builder; ii) 0.5 to 10% by weight of the composition of a non-ionic ternary mixture; iii) 5 to 50% by weight of the composition of a complexing agent, preferably a complexing agent comprising a salt of MGDA; iv) enzymes, preferably amylases and proteases; v) optionally, 0.5 to 5% by weight of the composition of a dispersant polymer, preferably a carboxylate / sulfonate polymer; vi) optionally, 5 to 20% by weight of the composition of a bleaching agent, more preferably a bleach catalyst.

[0083] The compositions of the present invention may be rinse aids that include a ternary mixture of a nonionic surfactant and other conventional rinse aid ingredients.

[0084] Hydrotropes The rinse aid composition of the present invention can include a hydrotrope. The hydrotrope enhances the water solubility of hydrophobic materials and provides physical stability to the composition. In some embodiments, the hydrotrope is a low molecular weight aromatic sulfonate material, such as cumene sulfonate, xylene sulfonate, and dialkyldiphenyloxide sulfonate materials. In other embodiments, the hydrotrope is a short chain length alkyl sulfate having less than 10 carbon atoms in the alkyl chain.

[0085] The hydrotrope or combination of hydrotropes may be present in the composition in an amount of from about 1% to about 50% by weight of the composition, hi other embodiments, the hydrotrope or combination of hydrotropes may be present in an amount of from about 10% to about 30% by weight of the composition.

[0086] Carrier The rinse composition of the present invention can be formulated as a liquid composition.Carrier can be included in such liquid formulation.Any carrier suitable for use in rinse aid composition can be used in the present invention.For example, in some embodiments, the composition comprises water as carrier.

[0087] In some embodiments, liquid rinse aid compositions according to the present invention contain up to about 98% water by weight of the composition, typically up to about 90% water by weight of the composition, hi other embodiments, liquid rinse aid compositions contain at least 50% water by weight of the composition, or at least 60% water by weight of the composition, as a carrier.

[0088] The rinse composition may also include a pH adjuster, glass care and / or metal care agent.

[0089] Methods of the Invention The method of the present invention comprises the following steps carried out in a dishwasher: a) loading dishes into a dishwasher; b) exposing the dishware to a main wash solution comprising the non-ionic three-component mixture of the present invention.

[0090] The method provides removal of oily soils even in highly stressed washes, i.e. washes containing high levels of soil, including oily soils, and even in programs with low wash cycle temperatures.

[0091] In this specification, "low temperature" means a program having a main wash temperature of 55°C or less, preferably 45°C or less, preferably 40°C or less.

[0092] The method of the present invention comprises the following steps carried out in a dishwasher: a) loading dishes into a dishwasher; b) exposing the dishware to a rinse solution comprising the non-ionic three-component mixture of the present invention.

[0093] This method provides good drying even in highly stressed systems and in programs with low temperature cycles.

[0094] Also provided is a method for providing drying during washing in a dishwashing machine, comprising the step of supplying an automatic dishwashing detergent composition comprising a ternary mixture of nonionic surfactants to the main wash of the dishwashing machine. The method provided good drying even when the composition was supplied in a unit dose form.

[0095] In the context of the present application, a "dishwashing program" is a complete washing process which preferably includes, in addition to the main washing cycle, a prewash, a prerinse and / or a rinse cycle and which can be selected and activated by a program switch of the dishwasher. The duration of these separate washing programs is advantageously at least 15 minutes, advantageously between 20 and 360 minutes, preferably between 20 and 90 minutes. Within the meaning of the present application, a "short washing program" lasts less than 60 minutes and a "long washing program" lasts less than 60 minutes.

[0096] A domestic dishwasher can usually provide several programs, such as a basic wash program for washing soiled dishes that have dried to a certain extent, an intensive wash program for washing very soiled dishes or in the case of food residues that are particularly difficult to remove (very dried or burnt stains), an economy wash program for washing less soiled dishes or partial loads of dishes, and a fast wash program for washing like the previous cycle when faster washing of partial loads of dishes is desired. Each program includes several successive steps. Usually, one or two low-temperature pre-wash cycles, a wash cycle (also known as the main wash), a low-temperature rinse cycle, a high-temperature rinse cycle, and optionally a drying cycle. During different cycles of the program, different compositions can be added to the water in the dishwasher to aid in cleaning. Preferably, a first composition is provided in the pre-wash and a second composition is provided in the main wash cycle.

[0097] In the course of a selected dishwashing program, a domestic dishwasher generally executes one or more cycles, such as a pre-wash, a main wash, an intermediate rinse cycle, a final rinse cycle, and then a drying cycle to finish the program. During each cycle, the washing liquid is distributed, in particular sprayed, by a rotating spray arm, a fixed spray nozzle, e.g. a top spray head, a movable spray nozzle, e.g. a top spin unit, and / or any other liquid dispensing device, into a processing chamber of the dishwasher cavity, where the washing liquid is applied to the items to be washed, such as dishes and / or cutlery, preferably supported in and / or on at least one loading unit, e.g. a pull-out rack or a cutlery drawer, which can be removed or withdrawn. For this purpose, the dishwasher is preferably supplied with washing liquid via at least one supply line by a working circulation pump, which washing liquid collects at the bottom of the dishwasher cavity, preferably in a recess, in particular in a sump. If the washing liquid has to be heated during the respective liquid-induced washing subcycle, the washing liquid is heated by a heating facility, which can be part of the circulation pump. At the end of each liquid induced cleaning subcycle, some or all of the cleaning liquid present within the processing chamber of each instance of the dishwasher cavity is pumped out by the drain pump.

[0098] The compositions of the present invention can be placed in a storage reservoir inside the dishwasher, which can contain multiple doses to be dispensed over multiple programs.

[0099] The reservoir containing the composition of the present invention can be located inside or outside the dishwasher. If located inside the dishwasher, the storage reservoir can be integral with the automatic dishwasher (i.e., a storage reservoir permanently fixed (built-in) to the automatic dishwasher) or can be free-standing (i.e., a separate containment reservoir that can be inserted inside the automatic dishwasher).

[0100] An example of an integrated storage reservoir is a container that is built into the door of an automatic dishwasher and connected to the interior of the dishwasher by a supply line.

[0101] The dosing device can be, for example, an automated unit with a storage reservoir and a dispensing unit capable of releasing controlled amounts of different compositions at different times, e.g., for the pre-wash and the main wash. Different types of hardware may be part of the dosing device for controlling the dispensing of the cleaning compositions or for communicating with external devices, such as a data processing unit, a dishwasher, or a mobile device or server that can be operated by a user.

[0102] Storage reservoirs, especially those that are to be placed inside a dishwasher, need to have very good thermal stability.

[0103] A preferred method according to the present invention is such that the composition remains in a storage reservoir located outside (e.g. WO 2019 / 81910 A1) or inside the dishwasher for at least 2, preferably at least 4, particularly preferably at least 8, in particular at least 12 separate dishwashing programs before being metered into the dishwasher.

[0104] The dosing system can be linked to sensors that can determine the amount of composition needed based on the sensor input. Sensors that can be used include pH, turbidity, temperature, humidity, conductivity, etc. The dishwasher may require data processing capabilities to achieve this. The dishwasher preferably has connectivity with other devices. This can be in the form of wi-fi, mobile data, bluetooth, etc. This allows the dishwasher to be monitored and / or controlled remotely. Preferably, this also allows the machine to connect with the internet.

[0105] The preferred storage reservoir, comprising one or more chambers, has a volume of 10-1000 ml, preferably 20-800 ml, in particular 50-500 ml.

[0106] The following are embodiments of the present invention: 1. An automatic dishwashing composition comprising a ternary mixture of nonionic surfactants, the ternary mixture comprising: (a) A nonionic surfactant having a high cloud point of 50° C. or more, wherein the high cloud point nonionic surfactant has a single alkoxylate type and is an alkoxylated C having 3 to 20 moles of alkylene oxide per mole of surfactant. 6~22 a high cloud point nonionic surfactant which is an alcohol nonionic surfactant; (b) a nonionic surfactant having a low cloud point of less than 50° C., wherein the low cloud point nonionic surfactant is an alkoxylated C alkoxylate having only two alkoxylate types selected from ethoxy, propoxy, and butoxy; 4~25 a low cloud point nonionic surfactant which is an alcohol nonionic surfactant; (c) an ethylene oxide-propylene oxide block copolymer having a cloud point of less than 50° C., preferably less than 40° C., the ethylene oxide-propylene oxide block copolymer having the following structure: EOx1 POy1 EOx2(I) POy2 EOx3 POy3(II) wherein each of x1, x2, and x3 is in the range of about 1 to about 50, and each of y1, y2, and y3 is in the range of about 10 to about 70; and a weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) of at least about 1.2:1; An automatic dishwashing composition, comprising a weight ratio of the low cloud point nonionic surfactant (b) to the ethylene oxide-propylene oxide block copolymer (c) of at least about 1.2:1. 2. The composition of embodiment 1, wherein the weight average ratio of high cloud point nonionic surfactant to low cloud point nonionic surfactant is from about 2:1 to 1:2. 3. The composition according to embodiment 1 or 2, wherein the high cloud point nonionic surfactant has a cloud point in the range of 60°C to 80°C, and the low cloud point nonionic surfactant has a cloud point in the range of 8°C to 35°C. 4. High cloud point nonionic surfactant is ethoxylated C 6~22 The composition of any one of embodiments 1 to 3, wherein the nonionic surfactant is an alcohol. 5. The composition of any one of embodiments 1-4, wherein the composition comprises from 0.5% to 40% by weight of the composition of the ternary mixture of nonionic surfactants. 6. The composition of any one of the preceding embodiments, wherein the composition is phosphate-free and comprises an enzyme and, optionally, a bleaching agent. 7. The composition of any one of embodiments 1-6, wherein the composition is a rinse aid. 8. A method for improving greasy soil suspension in automatic dishwashing at low temperatures using a composition according to any one of embodiments 1 to 7. 9. Use of a composition according to any one of embodiments 1 to 7 to improve oily soil suspension at low temperatures in automatic dishwashing. 10. A method of providing dryness during washing in a dishwasher, comprising the step of supplying an automatic dishwashing detergent composition according to any one of embodiments 1-7 to a main wash of the dishwasher. 11. The method of embodiment 10, wherein the cleaning composition is in a unit dose form. 12. A method of providing drying in a dishwasher, comprising the step of supplying a rinse composition according to any one of embodiments 1 to 7 to a rinse of the dishwasher. 13. Use of a composition according to any one of embodiments 1 to 7 for providing drying during washing in automatic dishwashing. EXAMPLES

[0107] An automatic dishwashing composition was prepared as detailed herein below.

[0108] I. Preparation of Test Compositions Tests were carried out using the following detergent compositions:

[0109] [Table 1]

[0110] [Table 2]

[0111] II. Test Procedure The test procedure replicates the wash and rinse cycles of a small-scale automatic dishwashing process and measures the ability of automatic dishwashing compositions to suspend grease-based soils. The ability to suspend grease-based soils is measured by assessing the redeposition of added colored canola oil onto a plastic substrate (polypropylene).

[0112] Preparation of colored canola oil: 250 mg of Solvent Red 26 (sold by Sigma Aldrich) is added to 1 liter of canola oil and mixed well until the dye is completely dissolved. - Preparation: The wash solution is prepared in water of the target water hardness and pipetted into a dedicated small container. The wash solution is preheated to the target wash temperature and kept at the set wash temperature for the duration of the wash cycle of the test procedure. - Washing process: Place clean polypropylene nonwoven fabric in the washing solution. 2 Use 4 ml of wash solution per 4 ml of wash solution. Add 0.125 ml of colored canola oil per 4 ml of wash solution. Washing is performed by pipetting the wash solution in and out of the container for 30 minutes. After the 30 minutes of washing, pipette out the wash solution. - Rinse step: pipette demineralized water into and out of the container three times at ambient temperature. The amount of demineralized water used is 1 cm 2 Repeat this process four times. - Drying process: The polypropylene nonwoven fabric is removed from the container and dried in an oven at 30°C for 24 hours. - Analysis: After drying, the polypropylene nonwoven fabrics are subjected to image analysis and their color is compared to that of unsoiled fabrics, which gives a Delta E value. A higher Delta E value means more colored canola oil has been redeposited, which means a lower oil soil suspension ability.

[0113]

number

[0114] A high Delta E means that the fabric will contain more colored stains and therefore have a lower ability to prevent oily stains from adhering to the fabric substrate.

[0115] Example 1

[0116] [Table 3]

[0117] [Table 4]

[0118] As can be seen from the above table, Formula B according to the invention provides lower Delta E and better oily soil suspension compared to Formula A not according to the invention.

[0119] Dimensions and values ​​disclosed herein should not be understood as being strictly limited to the exact numerical values ​​recited. Instead, unless otherwise indicated, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm."

Claims

1. 1. An automatic dishwashing composition comprising a three-component mixture of nonionic surfactants, said three-component mixture comprising: (a) A nonionic surfactant having a high cloud point of 50° C. or more, the high cloud point nonionic surfactant being an alkoxylated C alkoxylate having a single alkoxylate type and having 3 to 20 moles of alkylene oxide per mole of surfactant. ６～２２ a high cloud point nonionic surfactant which is an alcohol nonionic surfactant; (b) a nonionic surfactant having a low cloud point of less than 50° C., the low cloud point nonionic surfactant being an alkoxylated C alkoxylate having only two alkoxylate types selected from ethoxy, propoxy, and butoxy; ４～２５ a low cloud point nonionic surfactant which is an alcohol nonionic surfactant; (c) an ethylene oxide-propylene oxide block copolymer having a cloud point less than 50° C., said ethylene oxide-propylene oxide block copolymer having the following structure: EOx1 POy1 EOx2(I) POy2 EOx3 POy3(II) wherein each of x1, x2, and x3 ranges from 1 to 50, and each of y1, y2, and y3 ranges from 10 to 70; and a weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) of at least 1.2:1; an automatic dishwashing composition, wherein the weight ratio of said low cloud point nonionic surfactant (b) to said ethylene oxide-propylene oxide block copolymer (c) is at least 1.2:1; 2. The composition of claim 1, wherein the weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) is at least 2.0:

1.

3. The composition of claim 1, wherein the weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) is at least 2.5:

1.

4. The composition of claim 1, wherein the weight ratio of the high cloud point nonionic surfactant (a) to the ethylene oxide-propylene oxide block copolymer (c) is at least 3.0:

1.

5. The composition of any one of claims 1 to 4, wherein the weight average ratio of said high cloud point nonionic surfactant to said low cloud point nonionic surfactant is from 2:1 to 1:

2.

6. 6. The composition of claim 1, wherein the cloud point of the high cloud point nonionic surfactant is in the range of 60° C. to 80° C. and the cloud point of the low cloud point nonionic surfactant is in the range of 8° C. to 35° C.

7. The high cloud point nonionic surfactant is an ethoxylated C ６～２２ The composition according to any one of claims 1 to 6, which is an alcohol nonionic surfactant.

8. A composition according to any one of the preceding claims, wherein the composition comprises from 0.5% to 40% by weight of the composition of said ternary mixture of non-ionic surfactants.

9. A composition according to any one of claims 1 to 8, wherein the composition is phosphate-free and comprises an enzyme and optionally a bleaching agent.

10. The composition of any one of claims 1 to 9, wherein the composition is a rinse aid.

11. A method for improving greasy soil suspension in automatic dishwashing at low temperatures using a composition according to any one of claims 1 to 10.

12. Use of a composition according to any one of claims 1 to 10 to improve greasy soil suspension at low temperatures in automatic dishwashing.

13. 11. A method of providing dryness during washing in a dishwashing machine, comprising the step of supplying an automatic dishwashing detergent composition according to any one of claims 1 to 10 to a main wash of the dishwashing machine.

14. The method of claim 13, wherein the detergent composition is in a unit dose form.

15. A method of providing drying in a dishwasher, comprising the step of supplying a rinse composition according to any one of claims 1 to 10 to a rinse of the dishwasher.

16. Use of a composition according to any one of claims 1 to 10 to provide drying during washing in automatic dishwashing.