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] This invention belongs to the field of automatic dishwashing. In particular, the invention relates to a composition comprising a three-component mixture of nonionic surfactants. The composition of the present invention provides improved oil-stain suspending ability and gloss, and also provides improved drying properties, even at low temperatures. [Background technology]

[0002] A trend in automated dishwashing is to reduce the amount of energy required for the automated dishwashing process. One way to reduce energy consumption is to use lower temperatures. Lower temperatures present challenges, especially with heavily soiled dishes that have a high degree of grease. At lower temperatures, grease can reattach to dishes inside the dishwasher, creating oily films and stains, and can also reattach to internal components of the dishwasher, including filters. Another challenge is that dishes may not be completely dry at the end of the process.

[0003] International Publication No. 2010 / 067054(A1) discloses a liquid composition comprising a nonionic surfactant mixture containing 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 drying time. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] International Publication No. 2010 / 067054(A1) [Overview of the project] [Problems that the invention aims to solve]

[0005] The object of the present invention is to provide a composition that has improved oil-stain suspendability and gloss, as well as good drying properties, even at low temperatures. [Means for solving the problem]

[0006] According to a first aspect of the present invention, an automatic dishwashing composition is provided. The composition comprises a three-component mixture of nonionic surfactants. The three-component mixture is (a) A nonionic surfactant having a high cloud point of 50°C or higher, wherein the high cloud point nonionic surfactant has a single alkoxylate type and is alkoxylated C having 3 to 20 moles of alkylene oxide per mole of surfactant. 6~22 Alcohol nonionic surfactants, high cloud point nonionic surfactants, (b) A nonionic surfactant having a low cloud point of less than 50°C, wherein the low cloud point nonionic surfactant is alkoxylated C having only two alkoxylate types selected from ethoxy, propoxy and butoxy. 4~25 Alcohol nonionic surfactants, low cloud point nonionic surfactants, (c) An ethylene oxide-propylene oxide block copolymer having a cloud point of less than 50°C, wherein the ethylene oxide-propylene oxide block copolymer has the following structure: EOx1 POy1 EOx2(I) POy2 EOx3 POy3(II) A triblock copolymer having one of the following (wherein x1, x2, and x3 are each in the range of about 1 to about 50, and y1, y2, and y3 are each in the range of about 10 to about 70), comprising an ethylene oxide-propylene oxide block copolymer, 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 an automatic dishwashing system. The composition may be part of the main wash detergent or rinse aid, or it may be added separately to either the main wash, the rinse, or both from an automatic dispenser. The composition can be supplied from an automatic dispenser. The composition can be dispensed in unit dose form from a dishwashing dispenser, or in the form of a rinse aid from a rinse aid reservoir.

[0008] A further aspect of the present invention provides a method for automatic dishwashing, as well as the use of the composition of the present invention to provide oil-stain suspending and drying properties.

[0009] Elements of the first aspect of the present invention can be applied to other aspects of the present invention with necessary modifications. [Modes for carrying out the invention]

[0010] The present invention encompasses an automatic dishwashing composition comprising a three-component mixture of nonionic surfactants. The present invention also encompasses the use of a method and composition for providing good oil-stain suspension and gloss, as well as good drying properties, even at low temperatures. The method is preferably carried out in a household dishwasher.

[0011] Automatic dishwashers can be household or commercial / institutional machine-type. Generally, the differences lie in size, capacity, and the length of the dishwashing process. This can mean that the machines are designed in vastly different ways. Industrial / institutional machines often have significantly shorter but more energy-intensive cycles (e.g., at higher temperatures) and / or use significantly stronger chemicals compared to household machines. These industrial / institutional machines typically do not use enzymes, because these enzymes require a certain contact time with the dirt being treated to function effectively, which is too short for commercial cycle times. In commercially available dishwashers, the machine may be based on a conveyor system in which dishes move through one or more tanks in the dishwasher, whereas in household machines, dishes generally remain stationary at all times in a single tank inside the dishwasher, with all washing steps performed within that single tank. In household dishwashing, it is common practice 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 dishwasher.

[0013] In this specification, “dishes” means cooking utensils, tableware, and tableware, i.e., all items related to the preparation and serving of food and beverages that are normally washed in a dishwasher.

[0014] As used herein, the articles "a" and "an" are understood to mean one or more of what is claimed or described. Unless otherwise noted, all component or composition levels are with respect to the active portion of that component or composition, and impurities that may be present in commercially available sources of such components or compositions, e.g., residual solvents or by-products, are excluded. Unless specifically stated or required otherwise in context, the embodiments described herein apply equally to all aspects of the invention. Percentages recited are by weight unless specifically stated otherwise or required otherwise in context.

[0015] Unless otherwise specified, all measurements are carried out at 25 °C.

[0016] Three-component surfactant mixture The composition comprises a three-component mixture of nonionic surfactants. The three-component mixture is (a) a nonionic surfactant having a cloud point of 50 °C or higher, wherein the high-cloud-point nonionic surfactant has a single alkoxylate type and is an alkoxylated C alcohol nonionic surfactant 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, and (b) a nonionic surfactant having a cloud point of less than 50 °C, wherein the low-cloud-point nonionic surfactant has only two alkoxylate types selected from ethoxy, propoxy and butoxy and is an alkoxylated C alcohol nonionic surfactant 4~25 a low-cloud-point nonionic surfactant, which is an alcohol nonionic surfactant, and (c) an ethylene oxide-propylene oxide block copolymer having a cloud point of less than 50 °C, preferably less than 40 °C, wherein the ethylene oxide-propylene oxide block copolymer has the following structure: EOx1 POy1 EOx2(I) POy2 EOx3 POy3(II) (where 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), an ethylene oxide-propylene oxide block copolymer having one of them, 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 three-component mixture of nonionic surfactants included in the composition according to the present invention is described below. Compositions containing this mixture have been found to exhibit good oil-stain suspending properties even at low temperatures, and to exhibit particularly good drying properties in articles processed in a dishwashing cycle.

[0020] The composition of the present invention is a three-component surfactant mixture comprising a) a nonionic surfactant having a cloud point of 50°C or higher (referred to herein as "high-cloud point nonionic surfactant") and b) a nonionic surfactant having a cloud point of less than 50°C (referred to herein as "low-cloud point nonionic surfactant"), wherein the weight ratio of a) to b) is preferably in the range of 2:1 to 1:2. The three-component 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 a nonionic surfactant solution separates into a water-rich phase and a surfactant-rich phase, causing turbidity. The cloud point temperature can be visually determined by identifying the temperature at which clouding occurs.

[0022] The cloud point temperature of a nonionic surfactant can be determined as follows: Prepare a solution containing 1% by weight of the corresponding surfactant in distilled water. Gently agitate the solution before analysis to ensure the process occurs at chemical equilibrium. The phase inversion temperature is measured in a thermally stable bath by immersing the surfactant solution in a 75 mm sealed glass test tube. Weigh the test tube before and after the cloud point temperature measurement to prevent leakage. Gradually increase the temperature at a rate of less than 1°C / min until the temperature reaches several degrees below the pre-estimated cloud point temperature. The cloud point temperature is visually determined at the point when the first signs of turbidity appear.

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

[0024] According to the present invention, it is most preferable 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. According to the present invention, particularly good results have been achieved with compositions containing a mixture of nonionic surfactants, wherein 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 the reaction of a monohydroxyalkanol or alkylphenol having 6 to 22 carbon atoms, preferably 8 to 20 carbon atoms, most preferably 10 to 18 carbon atoms. The type of alkoxylate surfactant is preferably ethoxylate, butoxylate, or propoxylate, with ethoxylate being particularly preferred. The high-cloud-point surfactant preferably contains 3 to 20 moles, particularly preferably 4 to 10 moles, and even more preferably 5 to 8 moles, of alkylene oxide, particularly ethylene oxide, per mole of alcohol or alkylphenol. Particularly preferred high-cloud-point nonionic surfactants are C10 to C15 having 5 to 10 EO, more preferably C13 having 7 EO. High-cloud-point nonionic surfactants can be prepared from either branched-chain or linear fatty alcohols of the above types.

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

[0027] Low-cloud-point alkoxylated nonionic surfactants can be prepared by the reaction of a monohydroxyalkanol or alkylphenol having 4 to 25 carbon atoms, preferably 6 to 20 carbon atoms, most preferably 8 to 14 carbon atoms. The low-cloud-point surfactant preferably contains 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 ethoxylate, butoxylate, and / or propoxylate, with a mixture of ethoxylate and propoxylate being particularly preferred. The low-cloud-point surfactant preferably contains 2 to 25 moles, particularly 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. A mixture of butylene oxide or propylene oxide is also possible. Particularly preferred low-cloud-point surfactants are C10 to C12 having 10 to 20 EO and 10 to 20 PO. Low-cloud-point nonionic surfactants can be prepared from either branched-chain or linear fatty alcohols of the above types.

[0028] Low cloud-point surfactants may also include surfactants that are ethoxylated and butoxylated monohydroxyalkanols or alkylphenols further comprising polyoxyethylene-polyoxypropylene block copolymer units. The alcohol or alkylphenol portion of such surfactants constitutes more than 30% by weight, preferably more than 50% by weight, and 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, such as SLF180 and LF224, can also be used.

[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 so that the foaming properties of the composition are controlled within a desired range. Low foaming properties are usually desirable in automatic dishwashing applications.

[0031] According to the present invention, it is particularly preferable 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 used in the main wash cycle of an automatic dishwashing program, the amount of the nonionic three-component surfactant mixture is 0.5 to 20% by weight of the composition. For compositions used in the rinsing cycle of an automatic dishwashing program, the amount of the nonionic three-component mixture is 0.5 to 40% by weight of the composition.

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

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

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

[0037] The ethylene oxide-propylene oxide triblock copolymers of formulas I and 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 formulas I and II have a weight-average molecular weight of about 1,000 to about 10,000 daltons, preferably about 1,200 to about 8,000 daltons, more preferably about 1,500 to about 7,000 daltons, even more preferably about 1,750 to about 5,000 daltons, and most preferably about 2,000 to about 4,000 daltons.

[0039] Suitable ethylene oxide-propylene oxide triblock copolymers are commercially available from BASF as the Pluronic PE and Pluronic RPE series, or from Dow Chemical as the 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 may preferably be a cleaning composition that does not contain phosphates. The composition is preferably free of anionic and cationic surfactants. The composition comprises a three-component surfactant mixture and, optionally but preferably, a complexing agent, a dispersant polymer, a bleaching agent, an inorganic builder (preferably carbonates and / or silicates), enzymes, particularly proteases and amylase enzymes, a glass care agent, a metal care agent, and the like.

[0041] When the composition of the present invention is a cleaning composition, the composition 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 A complexing agent is a substance that can sequester hard ions, particularly calcium and / or magnesium.

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

[0044] Inorganic Builder The compositions of the present invention preferably include 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 contain 5 to 50% by weight, more preferably 10 to 40% by weight, and particularly 15 to 30% by weight of sodium carbonate.

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

[0046] The preferred 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 about 3,000 Da to about 50,000 Da, preferably about 5,000 Da to about 45,000 Da.

[0047] Preferred sulfonated monomers include one or more of the following: 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, methallylsulfonic 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-sulfopropyl methacrylate, sulfomethacrylamide, sulfomethylmethacrylamide, and mixtures of the above acids or water-soluble salts thereof.

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

[0049] In the polymer, all or some of the carboxylic acid groups or sulfonic acid groups may be present in a neutralized form, that is, the acidic hydrogen atoms of some or all of the carboxylic acid groups and / or sulfonic acid groups in the acidic groups may be replaced by metal ions, preferably alkali metal ions, particularly 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. These 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 also 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 especially preferably 3,000 to 5,000.

[0053] The polymer may be an acrylic acid-methacrylic acid copolymer, an acrylic acid and / or methacrylic acid-maleic acid copolymer, or an acrylic acid and / or methacrylic acid-fumaric acid copolymer, having a molecular weight of less than 70,000. Their molecular weights are in the range of 2,000 to 80,000 g / mol, more preferably 20,000 to 50,000 g / mol, and particularly 30,000 to 40,000 g / mol, with a ratio of (meth)acrylate to maleate or fumarate segment of 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 or 4,000 to 20,000, and an acrylamide content of less than 50% by weight or 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 as used herein also include itaconic acid homopolymers and copolymers. Alternatively, the polymer may be selected from the group consisting of alkoxylated polyalkylene imines, 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 contains an enzyme; more preferably, an amylase and a protease.

[0057] In describing enzyme variants in this specification, the following nomenclature is used for ease of reference: original amino acid: position: substituted amino acid. Standard single-letter amino acid codes from the IUPAC enzyme standard are used.

[0058] protease Suitable proteases include metalloproteases and serine proteases such as neutral or alkaline microbial serine proteases, such as subtilisin (EC 3.4.21.62), and chemically or genetically modified mutants thereof. Suitable proteases include subtilisin (EC 3.4.21.62) from the Bacillus genus, such as 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%, and especially 100% identity with wild-type enzymes derived from Bacillus lentus, which include mutants at one or more, preferably two or more, more preferably three or more, of the following positions when using the BPN numbering system and amino acid abbreviations as shown in International Publication No. 00 / 37627 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 including the following mutants (BPN numbering system) of either PB92 wild-type (Sequence ID 2 of International Publication No. 08 / 010925) or subtilisin 309 wild-type (sequence based on the PB92 backbone except for the natural variant 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 by Novozymes A / S (Denmark) under the trademarks Savinase®, Polarzyme®, Kannase®, Ovozyme®, Everlase®, and Esperase®; those sold by Genencor International under the trademarks Properase®, Purafect®, Purafect Prime®, Purafect Ox®, FN3®, FN4®, Excellase®, Ultimase®, and Purafect OXP®; those sold by Solvay Enzymes under the trademarks Opticlean® and Optimase®; and those available from Henkel / Kemira, i.e., BLAP.

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

[0063] amylase The composition of the present invention may contain 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. Patent No. 7,153,818), DSM 12368, DSMZ no. 12649, KSM AP1378 (International Publication No. 97 / 00324), KSM K36, or KSM K38 (European Patent No. 1,022,334). Preferred amylases include the following: (a) Variants described in U.S. Patent No. 5,856,164 and International Publication Nos. 99 / 23211, 96 / 23873, 00 / 60060 and 06 / 002643, in particular variants of AA560 SEQ ID NO: 3 having one or more substituents at the following positions: 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, including those with deletions. (b) A mutant showing at least 95% identity with the wild-type enzyme from Bacillus species 707 (Sequence ID 7 in U.S. Patent No. 6,093,562), particularly comprising one or more of the following mutants: M202, M208, S255, R172 and / or M261. Preferably, the amylase comprises one of the M202L or M202T mutants.

[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 Vienna, Austria), RAPIDASE®, PURASTAR®, ENZYSIZE®, OPTISIZE HT PLUS®, POWERASE®, EXCELLENZ® S 1000, and EXCELLENZ® S Examples include the EXCELLENZ® S series including 2000, PURASTAR OXAM® (DuPont Industrial Biosciences, Palo Alto, California), and KAM® (Kao Corporation (Japan, 103-8210, 1-14-10 Nihonbashi Kayabacho, Chuo-ku, Tokyo)). Particularly preferred amylases for use in this specification include NATALASE®, STAINZYME®, STAINZYME PLUS®, EXCELLENZ® S 1000, EXCELLENZ® S 2000, 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, and particularly 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 granules, and these granules contain more than 29% by weight of sodium sulfate, and / or the sodium sulfate and active enzyme (protease and / or amylase) are in a weight ratio of 3:1 to 100:1, 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 further growth of species such as aragonite and calcite.

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

[0069] bleach The composition of the present invention may contain a bleaching agent in an amount of about 8 to about 30% by weight, more preferably about 9 to about 25% by weight, and even more preferably about 9 to about 20% by weight of the composition.

[0070] Inorganic and organic bleaching agents are suitable for use in this specification. Examples of inorganic bleaching agents include superhydrates such as perborates, percarbonates, persulfates, and persilicates. Inorganic superhydrates are typically alkali metal salts. Inorganic superhydrates may be present as crystalline solids without additional protection. Alternatively, the salts may be coated. Suitable coatings include sodium sulfate, sodium carbonate, sodium silicate, and mixtures thereof. The coatings may be applied as a mixture to the surface or in sequential layers.

[0071] Alkali metal percarbonates, particularly sodium percarbonate, are preferred bleaching agents for use in this specification. The percarbonates are most preferably incorporated into the product in a coated form that provides in-product stability.

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

[0073] Typical organic bleaching agents are organic peroxy acids, particularly dodecanediperoxy acid, tetradecanediperoxy acid, and hexadecanediperoxy acid. Mono and diperazelaic acids, and mono and diperbrassilicic acids are also preferred herein. Diacyl and tetraacyl peroxides, such as dibenzoyl peroxide and dilauroyl peroxide, are other organic peroxides that can be used in connection with the present invention.

[0074] Further typical organic bleaching agents include peroxy acids, specifically alkylperoxy acids and arylperoxy acids. Preferred representative examples include (a) peroxybenzoic acid and its ring-substituted derivatives, such as alkylperoxybenzoic acid, as well as peroxy-α-naphthoic acid and magnesium monoperphthalate; (b) aliphatic or substituted aliphatic peroxy acids, such as peroxylauric acid, peroxystearic acid, ε-phthalimidoperoxycaproic acid [phthaloiminoperoxyhexanoic acid (PAP)], o-carboxybenzamideperoxycaproic acid, N-nonenylamideperadipic acid and N-nonenylamidepersuccinate; and (c) aliphatic and aromatic aliphatic peroxydicarboxylic acids, such as 1,12-diperoxycarboxylic acid, 1,9-diperoxyazelaic acid, diperoxysebacic acid, diperoxybrassic acid, diperoxyphthalic acid, 2-decyldiperoxybutane-1,4-diacid, and N,N-terephthaloyldi(6-aminopercaproic acid).

[0075] bleach activator Bleaching activators are typically organic peracid precursors that enhance the bleaching action during washing at temperatures below 60°C. Suitable bleaching activators for use herein include compounds that, under hyperhydrolysis conditions, yield aliphatic peroxocarboxylic acids having preferably 1 to 12 carbon atoms, particularly 2 to 10 carbon atoms, and / or optionally substituted perbenzoic acids. Suitable substances have O-acyl and / or N-acyl groups with a specified number of carbon atoms and / or optionally substituted benzoyl groups. Polyacylated alkylenediamines, particularly tetraacetylethylenediamine (TAED), acylated triazine derivatives, particularly 1,5-diacetyl-2,4-dioxohexahydro-1,3,5-triazine (DADHT), acylated glycoluryls, particularly tetraacetylglycoluryl (TAGU), N-acylimides, particularly N-nonanoylsuccinimide (NOSI), acylated phenolsulfonates, particularly n-nonanoyl- or isononanoyloxybenzenesulfonates (n- or iso-NOBS), decanoyloxybenzoic acid (DOBA), carboxylic acids anhydride, particularly phthalic anhydride, acylated polyhydric alcohols, particularly triacetin, ethylene glycol diacetate and 2,5-diacetoxy-2,5-dihydrofuran, and triethylacetyl citrate (TEAC) are also preferred. If present, the composition of the present invention contains 0.01 to 5% by weight, preferably 0.2 to 2% by weight, of the bleaching activator, preferably TAED.

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

[0077] Preferred bleaching catalysts for use in this specification include manganese triazacyclononane and related complexes, Co, Cu, Mn, and Fe bispyridylamine and related complexes, and cobalt(III) pentamicacetate and related complexes.

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

[0079] Metal cleaning agent Metal care agents 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 to 5% by weight, more preferably 0.2 to 4% by weight, and particularly 0.3 to 3% by weight of a metal care agent, wherein the metal care agent is preferably benzotriazole (BTA).

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

[0081] The composition of the present invention may preferably be a rinsing aid comprising a nonionic three-component mixture and optionally a hydrotrope, fragrance, complexing agent, glass care agent, metal care agent, etc. Such components 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 rinsing aid, the composition preferably has a pH of less than 8, more preferably less than 7.5, when measured in a 1% by weight / volume aqueous solution in distilled water at 20°C.

[0082] Preferably, the cleaning composition of the present invention, i) 5 to 50% by weight of the builder in the composition, ii) A nonionic three-component mixture in an amount of 0.5 to 10% by weight of the composition, iii) A complexing agent comprising 5 to 50% by weight of the composition, preferably a salt of MGDA, iv) Enzymes, preferably amylase and protease, v) Optionally, 0.5 to 5% by weight of the composition of a dispersant polymer, preferably a carboxylate / sulfonate polymer, vi) optionally comprising 5 to 20% by weight of a bleaching agent, more preferably a bleaching catalyst, of the composition.

[0083] The composition of the present invention may be a rinsing aid comprising a three-component mixture of a nonionic surfactant and other conventional rinsing aid components.

[0084] Hydrotrope The rinsing aid composition of the present invention may contain a hydrotrope. The hydrotrope enhances the water solubility of hydrophobic substances 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 dialkyldiphenyl oxide sulfonate material. In other embodiments, the hydrotrope is a short-chain alkyl sulfate having fewer than 10 carbon atoms in the alkyl chain.

[0085] Hydrotropes or combinations of hydrotropes may be present in the composition in an amount of about 1% to about 50% by weight of the composition. In other embodiments, hydrotropes or combinations of hydrotropes may be present in an amount of about 10% to about 30% by weight of the composition.

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

[0087] In some embodiments, the liquid rinsing aid composition according to the present invention contains water at a rate of about 98% by weight or less of the composition, typically about 90% by weight or less of the composition. In other embodiments, the liquid rinsing aid composition contains at least 50% by weight or at least 60% by weight of the composition as a carrier.

[0088] The rinsing composition may contain a pH adjuster, a glass care agent, and / or a metal care agent.

[0089] Method of the present invention The method of the present invention involves the following steps performed in a dishwasher, namely, a) The process of putting dishes into the dishwasher, b) The process includes the step of exposing tableware to a main cleaning solution containing the nonionic three-component mixture of the present invention.

[0090] This method provides grease removal even in the case of heavily stressed dishes, i.e., dishes with high levels of dirt including grease, and even in programs with low-temperature wash cycles.

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

[0092] The method of the present invention involves the following steps performed in a dishwasher, namely, a) The process of putting dishes into the dishwasher, b) The step of exposing tableware to a rinsing solution containing the nonionic three-component mixture of the present invention.

[0093] This method provides good drying even in systems subjected to high stress, and in programs with low-temperature cycles.

[0094] A method is also provided for providing drying during washing in a dishwasher, comprising the step of supplying an automatic dishwashing detergent composition containing a three-component mixture of nonionic surfactants to the main wash cycle of the dishwasher. This method provided good drying even when the composition was supplied in unit dose form.

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

[0096] Household dishwashers can typically offer multiple programs, such as a basic wash program for washing partially dried, soiled dishes; an intensive wash program for washing heavily soiled dishes or particularly difficult-to-remove food residue (very dried or burnt stains); an economy wash program for washing lightly soiled dishes or partial loads of dishes; and a fast wash program for washing partial loads of dishes more quickly than the previous cycle. Each program includes several consecutive steps, typically one or two low-temperature pre-wash cycles, a wash cycle (also known as a main wash), a low-temperature rinse cycle, a high-temperature rinse cycle, and optionally a drying cycle. Between different cycles of a program, different compositions can be added to the water in the dishwasher to aid in washing. Preferably, a first composition is supplied for the pre-wash, and a second composition is supplied for the main wash cycle.

[0097] During the course of a selected dishwashing program, a household dishwasher typically completes the program by performing one or more cycles, such as a pre-wash, main wash, intermediate rinse cycle, final rinse cycle, and then a drying cycle. During each cycle, the cleaning solution is distributed, and in particular sprayed, into the processing chamber of the dishwasher cavity by a rotating spray arm, a fixed spray nozzle, such as a top spray head, a movable spray nozzle, such as a top spin unit, and / or some other liquid distribution device. Within the processing chamber, the cleaning solution is added to the items to be washed, such as dishes and / or cutlery, supported in and / or on at least one loading unit that can be removed or pulled out, such as a pull-out rack or cutlery drawer. For this purpose, the dishwasher is preferably supplied with cleaning solution via at least one supply line by an operating circulation pump, and the cleaning solution collects at the bottom of the dishwasher cavity, preferably in a recess, particularly a sump. If the cleaning solution must be heated during each liquid induction washing subcycle, the cleaning solution is heated by a heating device, which may be part of the circulation pump. At the end of each liquid induction washing subcycle, some or all of the washing liquid present in the processing chamber of the dishwasher cavity of each instance is pumped out by a drain pump.

[0098] The composition of the present invention can be placed in a storage reservoir inside a dishwasher, and the reservoir can accommodate multiple doses to be distributed to multiple programs.

[0099] A reservoir containing the composition of the present invention can be located inside or outside a dishwasher. When located inside a dishwasher, the storage reservoir can be integrated with the automatic dishwasher (i.e., a storage reservoir permanently fixed (built into) the automatic dishwasher), or it can be freestanding (i.e., an independent storage reservoir that can be inserted inside the automatic dishwasher).

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

[0101] The dispensing device may be an automated unit comprising, for example, a storage reservoir and a distribution unit capable of dispensing controlled amounts of different compositions at different times, for example, for pre-washing and main washing. Different types of hardware may be part of the dispensing device for controlling the distribution of the washing composition or for communicating with external devices such as a data processing unit, a dishwasher, or a user-operated mobile device or server.

[0102] Storage reservoirs, especially those located inside dishwashers, must have extremely 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., International Publication No. 2019 / 81910A1) or inside the dishwasher for at least two, preferably at least four, particularly preferably at least eight, and especially at least twelve separate dishwashing programs before being metered and supplied into the dishwasher.

[0104] The dispensing system can be linked to a sensor that can determine the required amount of composition based on sensor input. Possible sensors 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 take 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 to the internet.

[0105] The preferred storage reservoir volume, which includes one or more chambers, is 10 to 1000 ml, preferably 20 to 800 ml, and particularly 50 to 500 ml.

[0106] The following are embodiments of the present invention: 1. An automatic dishwashing composition comprising a three-component mixture of nonionic surfactants, wherein the three-component mixture is (a) A nonionic surfactant having a high cloud point of 50°C or higher, wherein the high cloud point nonionic surfactant has a single alkoxylate type and is alkoxylated C having 3 to 20 moles of alkylene oxide per mole of surfactant. 6~22 Alcohol nonionic surfactants, high cloud point nonionic surfactants, (b) A nonionic surfactant having a low cloud point of less than 50°C, wherein the low cloud point nonionic surfactant is alkoxylated C having only two alkoxylate types selected from ethoxy, propoxy and butoxy. 4~25 Alcohol nonionic surfactants, low cloud point nonionic surfactants, (c) An ethylene oxide-propylene oxide block copolymer having a cloud point of less than 50°C, preferably less than 40°C, wherein the ethylene oxide-propylene oxide block copolymer has the following structure: EOx1 POy1 EOx2(I) POy2 EOx3 POy3(II) A triblock copolymer having one of the following (wherein x1, x2, and x3 are each in the range of about 1 to about 50, and y1, y2, and y3 are each in the range of about 10 to about 70), comprising an ethylene oxide-propylene oxide block copolymer, 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. An automatic dishwashing composition having a weight ratio of at least about 1.2:1 between a low-cloud-point nonionic surfactant (b) and an ethylene oxide-propylene oxide block copolymer (c). 2. The composition according to embodiment 1, wherein the weight average ratio of the high cloud point nonionic surfactant to the low cloud point nonionic surfactant is about 2:1 to 1:2. 3. The composition according to embodiment 1 or 2, 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. 4. The high cloud point nonionic surfactant is an ethoxylated C 6~22 The composition according to any one of embodiments 1 to 3, which is an alcohol nonionic surfactant. 5. The composition according to any one of embodiments 1 to 4, wherein the composition contains a three-component mixture of nonionic surfactants of 0.5% to 40% by weight of the composition. 6. The composition according to any one of embodiments 1 to 5, wherein the composition does not contain phosphate and contains an enzyme and optionally a bleaching agent. 7. The composition according to any one of embodiments 1 to 6, wherein the composition is a rinsing aid. 8. A method for improving the oil stain suspension property at low temperature in automatic dishwashing, using the composition according to any one of embodiments 1 to 7. 9. Use of the composition according to any one of embodiments 1 to 7 for improving the oil stain suspension property at low temperature in automatic dishwashing. 10. A method for providing drying during washing in a dishwasher, comprising the step of supplying the automatic dishwashing detergent composition according to any one of embodiments 1 to 7 to the main washing of the dishwasher. 11. The method according to embodiment 10, wherein the cleaning composition is in unit dosage form. 12. A method for providing drying in a dishwasher, comprising the step of supplying the rinsing composition according to any one of embodiments 1 to 7 to the rinsing of the dishwasher. 13. Use of the 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 below in this specification.

[0108] I. Preparation of Test Compositions The following detergent compositions were used for the tests:

[0109] [Table 1]

[0110] [Table 2]

[0111] II. Test Procedure The test procedure replicates the wash and rinse cycles of a small-scale automated dishwasher process and measures the oil-stain suspension capacity of the automated dishwasher composition. Oil-stain suspension capacity is measured by evaluating the re-adhesion of added colored canola oil to a plastic substrate (polypropylene).

[0112] Preparation of colored canola oil: Add 250 mg of Solvent Red 26 (sold by Sigma Aldrich) to 1 liter of canola oil and mix well until the dye is completely dissolved. - Preparation: Prepare the washing solution in water with the target water hardness and transfer it to a dedicated small container using a pipette. Preheat the washing solution to the target washing temperature and maintain it at the set washing temperature throughout the washing cycle of the test procedure. -Washing process: Place a clean polypropylene nonwoven fabric into the washing solution. 1 cm of fabric 2 Use 4 ml of washing solution per container. Add 0.125 ml of colored canola oil to each 4 ml of washing solution. Wash the container by pipetting the washing solution in and out for 30 minutes. After 30 minutes of washing, remove the washing solution with a pipette. - Rinsing process: Use a pipette to add and remove the desalinated water to the container three times at ambient temperature. The amount of desalinated water used should be the same as the amount of cloth per 1 cm. 2 Use 4 ml per unit. Repeat this process four times. -Drying process: Remove the polypropylene nonwoven fabric from the container and dry it in an oven at 30°C for 24 hours. - Analysis: After drying, the polypropylene nonwoven fabric is subjected to image analysis, and its color is compared to the color of an unstained cloth. This yields a Delta E value. A higher Delta E value indicates that more colored canola oil has reattached, and therefore indicates a lower oil stain suspension capacity.

[0113]

number

[0114] A high Delta E means the fabric contains more colored stains and therefore has a lower ability to prevent oil stains from adhering to the fabric substrate.

[0115] Example 1

[0116] [Table 3]

[0117] [Table 4]

[0118] As can be seen from the table above, formulation B according to the present invention provides a lower Delta E and better oil stain suspension properties compared to formulation A which does not conform to the present invention.

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

Claims

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

1.

2. The composition according to claim 1, wherein the weight average ratio of the high-cloud-point nonionic surfactant to the low-cloud-point nonionic surfactant is 2:1 to 1:

2.

3. The composition according to claim 1 or 2, 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.

4. The aforementioned high-cloud-point nonionic surfactant is ethoxylated C ６～２２ A composition according to any one of claims 1 to 3, wherein the surfactant is an alcohol nonionic surfactant.

5. The composition according to any one of claims 1 to 4, wherein the composition comprises a three-component mixture of the nonionic surfactant in an amount of 0.5% to 40% by weight of the composition.

6. The composition according to any one of claims 1 to 5, wherein the composition does not contain phosphates and optionally contains an enzyme and a bleaching agent.

7. The composition according to any one of claims 1 to 6, wherein the composition is a rinsing aid.

8. A method for improving the suspendability of oil stains in automatic dishwashing at low temperatures, using the composition described in any one of claims 1 to 7.

9. Use of the composition according to any one of claims 1 to 7 to improve the suspendability of oil stains at low temperatures in automatic dishwashing.

10. A method for providing drying during washing in a dishwasher, comprising the step of supplying the automatic dishwashing detergent composition according to any one of claims 1 to 7 to the main wash of the dishwasher.

11. The method according to claim 10, wherein the detergent composition is in unit dose form.

12. A method for providing drying in a dishwasher, comprising the step of supplying a rinsing composition according to any one of claims 1 to 7 to the rinsing cycle of the dishwasher.

13. Use of the composition according to any one of claims 1 to 7 for providing drying during washing in an automatic dishwasher.

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