Hydrotropic Cleaning Composition

Abstract

A hydrotrope comprising water, a surfactant, and structure (I), wherein m in structure (I) is: 13 and a hydrotrope having a C NMR of 1.0 to 1.2 as measured by C nuclear magnetic resonance.

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to cleaning compositions, and more particularly to cleaning compositions that include a hydrotrope. [Background technology]

[0002] Introduction In cleaning applications, hydrotropes are compounds that allow surfactants to solubilize in a formulation at concentrations higher than the formulation typically supports. Under certain circumstances, such as high alkalinity (i.e., 10 weight percent ("wt%) or higher NaOH in the cleaning formulation), hydrotropes are useful because surfactant solubility in the cleaning composition is low. Low surfactant solubility in the cleaning composition means that the cleaning composition may not only lack sufficient cleaning power due to low surfactant loading, but may also exhibit a cloudy appearance (due to the insolubility of the surfactant in the formulation), phase separation, and instability. Thus, hydrotropes can be thought of as coupling or solubilizing agents between surfactants and the cleaning composition. A measure of how well a hydrotrope binds nonionic surfactants (the most common type of surfactant in industrial cleaning formulations) to an alkaline composition is the amount of hydrotrope required to impart a cloud point increase to the cleaning composition. A hydrotrope is considered to be successfully coupled if a 1 wt % nonionic surfactant solution with an initial cloud point of 35°C in 5 wt % aqueous NaOH at 23°C is converted from a cloudy (i.e., insoluble) state to a clear state with the addition of only 2.5 wt % of the hydrotrope.

[0003] Hydrotropes can also affect other properties of cleaning compositions. For example, some hydrotropes are known to produce stable foam, which is typically not advantageous in industrial cleaning environments. For example, while some alkyl polyglucosides can be used in hydrotropes, U.S. Patent No. 3,219,656 explains that alkyl polyglucosides "exhibit highly stable foam and act as foam stabilizers for other surfactants." Stable foam in industrial cleaning applications presents problems due to additional rinse time and water consumption, as well as foam clogging the cleaning system's machinery. The Ross-Miles Foam Height test is a standard foam testing method for amphiphiles, in which an aqueous solution of a surfactant or hydrotrope sample is poured into a test tube and the initial height of any foam is compared to the foam height after 5 minutes of allowing the foam to dissipate. Typically, surfactants or hydrotropes that exhibit an initial foam height of less than 50 mm (in a 0.1 wt. % aqueous solution) and a foam height of less than 20 mm after 5 minutes are considered low-foam surfactants or hydrotropes.

[0004] Furthermore, an increasingly important trend is the switch to environmentally friendly hydrotropes. Cleaning solution manufacturers are increasingly considering that the ingredients utilized in cleaning solutions be environmentally friendly and biodegradable. Traditional hydrotropes include the phosphate and (di)sulfonate types, both of which are under increasing scrutiny. For example, phosphorus-containing hydrotropes increase eutrophication in waterways, while some sulfonate-type hydrotropes are alleged to be either not readily biodegradable or to be highly irritating to the eyes and skin.

[0005] In light of these competing interests, it is surprising to discover a cleaning composition utilizing an alkyl polyglucoside hydrotrope that is not only successful under the above guidelines, but also exhibits initial foam of less than 50 mm and foam of less than 20 mm after 5 minutes when tested at 0.1 wt. % according to the Ross-Miles Foam Height Test, and is readily biodegradable. Summary of the Invention

[0006] The inventors of the present application have discovered cleaning compositions utilizing alkyl polyglucoside hydrotropes that are not only successful under the above guidelines, but also exhibit initial foam of less than 50 mm and foam of less than 20 mm after 5 minutes when tested at 0.1 wt. % according to the Ross-Miles Foam Height Test, and are readily biodegradable.

[0007] The present disclosure provides a compound having structure (I):

[0008] [ka] This finding demonstrates that cleaning compositions can achieve the aforementioned benefits when utilizing a hydrotrope having the formula (I), where m is 1.0 to 1.2. As explained above, alkyl glucosides are typically used in applications where high, stable foam is desired. Surprisingly, branched alkyl 2-octanols of structure (I) having m of 1.0 to 1.2, when tested at 0.1 wt.% according to the Ross-Miles Foam Height Test, exhibit 10 mm initial foam and 0 mm foam after 5 minutes. Without being bound by theory, it is believed that the lightly branched nature of structure (I) renders the hydrotrope unable to stabilize foam generated by agitation of a cleaning composition containing the hydrotrope. The low m value combined with the 2-octyl of structure (I) also places the hydrotrope's hydrophilic-lipophilic balance at a value that provides excellent cloud point increase, allowing the hydrotrope to solubilize and successfully bind surfactants to the cleaning composition. Finally, the use of alkyl glucoside hydrotropes does not adversely affect the biodegradability and environmentally friendly nature of the cleaning compositions to which they are added, as compared to phosphate or sulfonate hydrotropes.

[0009] According to a first aspect of the present disclosure, a cleaning composition comprises water, a surfactant, and a hydrotrope having structure (I), wherein m in structure (I) is: 13and a hydrotrope having a C content of 1.0 to 1.2 as measured by C nuclear magnetic resonance.

[0010] According to a second feature of the present disclosure, the surfactant is a nonionic surfactant.

[0011] According to a third aspect of the present disclosure, the cleaning composition comprises 0.01 wt % to 10.0 wt % of a surfactant, based on the total weight of the cleaning composition.

[0012] According to a fourth aspect of the present disclosure, the cleaning composition comprises an alkali salt.

[0013] According to a fifth aspect of the present disclosure, the cleaning composition comprises 0.1 wt % or more of NaOH, based on the total weight of the cleaning composition.

[0014] According to a sixth aspect of the present disclosure, the cleaning composition comprises 0.01% to 20.0% by weight of a hydrotrope.

[0015] According to a seventh aspect of the present disclosure, the cleaning composition comprises 0.5 wt % to 10.0 wt % of a hydrotrope, based on the total weight of the cleaning composition.

[0016] According to an eighth feature of the present disclosure, m in structure (I) is 1.0. DETAILED DESCRIPTION OF THE INVENTION

[0017] As used herein, the term "and / or," when used in a list of two or more items, means that any one of the listed items can be used by itself, or any combination of two or more of the listed items can be used. For example, if a composition is described as containing components A, B, and / or C, the composition can contain A alone, B alone, C alone, A and B in combination, A and C in combination, B and C in combination, or A, B, and C in combination.

[0018] Unless otherwise stated, all ranges are inclusive of the endpoints.

[0019] As used herein, the term weight percent ("wt %") refers to the weight percentage of a component relative to the total weight of the glycol composition, unless otherwise specified.

[0020] As used herein, Chemical Abstract Services Registry Number ("CAS Number") refers to the unique numeric identifier last assigned to a chemical compound by the Chemical Abstract Service as of the priority date of this document.

[0021] Cleaning Composition The cleaning compositions of the present disclosure comprise water, a surfactant, and a compound having the structure (I):

[0022] [ka] wherein m in structure (I) is 13 The cleaning composition comprises a hydrophobicity of 1.0 to 1.2 as measured by C nuclear magnetic resonance. The cleaning composition comprises 70% to 90% by weight of water, based on the total weight of the cleaning composition. For example, the cleaning composition may comprise 70% or more, or 72% or more, or 74% or more, or 76% or more, or 78% or more, or 80% or more, or 82% or more, or 84% or more, or 86% or more, or 88% or more, or 90% or more, or 92% or more, or 94% or more, or 96% or more, or 98% or more, while simultaneously comprising 99% or less, or 98% or less, or 96% or less, or 94% or less, or 92% or less, or 90% or less, or 88% or less, or 86% or less, or 84% or less, or 82% or less, or 80% or less, or 78% or less, or 76% or less, or 74% or less, or 72% or less by weight of water, based on the total weight of the cleaning composition.

[0023] surfactants The cleaning composition includes a surfactant. As used herein, the term "surfactant" refers to a material capable of reducing the interfacial energy between two different substances. The surfactant may be an anionic surfactant, a nonionic surfactant, a cationic surfactant, an amphoteric surfactant, and / or a combination thereof. The hydrophobic portion of the surfactant may be a branched or linear primary or secondary alkyl, saturated or unsaturated, or an alkyl with multiple aryl groups. In certain examples, the surfactant may be a branched alcohol ethoxylate. Commercially available examples of surfactants include ECOSURF™ LFE-635 from The Dow Chemical Company (Midland, Michigan), or widely available examples of primary C12-14 alcohol ethoxylates, such as TERGITOL™ 26-L-9.

[0024] The cleaning composition may contain 0.01 wt.% to 10.0 wt.% of surfactants based on the total weight of the cleaning composition. For example, the cleaning composition may contain 0.01 wt.% or more, or 0.1 wt.% or more, or 0.5 wt.% or more, or 1.0 wt.% or more, or 1.5 wt.% or more, or 2.0 wt.% or more, or 2.5 wt.% or more, or 3.0 wt.% or more, or 3.5 wt.% or more, or 4.0 wt.% or more, or 4.5 wt.% or more, or 5.0 wt.% or more, or 5.5 wt.% or more, or 6.0 wt.% or more, or 6.5 wt.% or more, or 7.0 wt.% or more, or 7.5 wt.% or more, or 8.0 wt.% or more, or 8.5 wt.% or more, or 9.0 wt.% or more, or 9.5 wt.% or more based on the total weight of the cleaning composition. % or more, while at the same time comprising 10.0% by weight or less, or 9.5% by weight or less, or 9.0% by weight or less, or 8.5% by weight or less, or 8.0% by weight or less, or 7.5% by weight or less, or 7.0% by weight or less, or 6.5% by weight or less, or 6.0% by weight or less, or 5.5% by weight or less, or 5.0% by weight or less, or 4.5% by weight or less, or 4.0% by weight or less, or 3.5% by weight or less, or 3.0% by weight or less, or 2.5% by weight or less, or 2.0% by weight or less, or 1.5% by weight or less, or 1.0% by weight or less, or 0.1% by weight or less, or 0.05% by weight or less of a surfactant.

[0025] Hydrotrope The cleaning composition comprises a compound having the structure (I):

[0026] [ka] and m in structure (I) is 13 When measured by C nuclear magnetic resonance, m is 1.0 to 1.2. For example, m in structure (I) is 13 When measured according to C nuclear magnetic resonance, the m portion of structure (I) may have an average value of 1.0 or greater, or 1.05 or greater, or 1.10 or greater, or 1.15 or greater, while simultaneously being 1.20 or less, or 1.15 or less, or 1.10 or less, or 1.05 or less. The m portion of structure (I) may also be referred to as a glucose repeat unit.

[0027] The cleaning composition may comprise from 0.01% to 20.0% by weight of the hydrotrope, based on the total weight of the cleaning composition.For example, the cleaning composition may have a total weight of 0.01 wt. % or more, or 0.1 wt. % or more, or 0.5 wt. % or more, or 1.0 wt. % or more, or 1.5 wt. % or more, or 2.0 wt. % or more, or 2.5 wt. % or more, or 3.0 wt. % or more, or 3.5 wt. % or more, or 4.0 wt. % or more, or 4.5 wt. % or more, or 5.0 wt. % or more, or 5.5 wt. % or more, or 6.0 wt. % or more, or 6.5 wt. % or more, or 7.0 wt. % or more, or 7.5 wt. % or more, or 8.0 wt. % or more, or 8.5 wt. % or more, or 9.0 wt. % or more, or is 9.5% by weight or more, 10.0% by weight or more, or 10.5% by weight or more, or 11.0% by weight or more, or 11.5% by weight or more, or 12.0% by weight or more, or 12.5% ​​by weight or more, or 13.0% by weight or more, or 13.5% by weight or more, or 14.0% by weight or more, or 14.5% by weight or more, or 15.0% by weight or more, or 15.5% by weight or more, or 16.0% by weight or more, or 16.5% by weight or more, or 17.0% by weight or more, or 17.5% by weight or more, or 18.0% by weight or more, or 18.5% by weight or more, or 19.0% by weight or more, or 19.5% by weight or more while simultaneously being 20.0% by weight or less, or 19.5% by weight or less, or 19.0% by weight or less, or 18.5% by weight or less, or 18.0% by weight or less, or 17.5% by weight or less, or 17.0% by weight or less, or 16.5% by weight or less, or 16.0% by weight or less, or 15.5% by weight or less, or 15.0% by weight or less, or 14.5% by weight or less, or 14.0% by weight or less, or 13.5% by weight or less, or 13.0% by weight or less, or 12.5% ​​by weight or less, or 12.0% by weight or less, or 11.5% by weight or less, or 11.0% by weight or less, or 10.5% by weight or less or 10.0% by weight or less, or 9.5% by weight or less, or 9.0% by weight or less, or 8.5% by weight or less, or 8.0% by weight or less, or 7.5% by weight or less, or 7.0% by weight or less, or 6.5% by weight or less, or 6.0% by weight or less, or 5.5% by weight or less, or 5.0% by weight or less, or 4.5% by weight or less, or 4.0% by weight or less, or 3.5% by weight or less, or 3.0% by weight or less, or 2.5% by weight or less, or 2.0% by weight or less, or 1.5% by weight or less, or 1.0% by weight or less, or 0.1% by weight or less, or 0.05% by weight or less of a hydrotrope.

[0028] alkaline salts The cleaning composition may include an alkali salt. For example, the alkali salt may be an alkali hydroxide or an alkaline earth hydroxide. The alkali metal salt may be selected from the group consisting of sodium hydroxide (i.e., NaOH), potassium hydroxide, and / or a combination thereof, or may be in combination with certain amines, such as monoethanolamine.

[0029] The cleaning composition may comprise from 0.01 wt.% to 40.00 wt.% of an alkali salt, based on the total weight of the cleaning mixture. For example, the cleaning mixture may comprise at least 0.01 wt.%, or at least 0.1 wt.%, or at least 0.50 wt.%, or at least 1.00 wt.%, or at least 1.50 wt.%, or at least 2.00 wt.%, or at least 2.50 wt.%, or at least 5.00 wt.%, or at least 7.50 wt.%, or at least 10.00 wt.%, or at least 12.50 wt.%, or at least 15.00 wt.%, or at least 17.50 wt.%, or at least 20.00 wt.%, or at least 22.50 wt.%, or at least 25.00 wt.%, or at least 27.50 wt.%, or at least 30.00 wt.%, or at least 32.50 wt.%, or at least 35.00 wt.%, or at least 37. % or more, while at the same time containing 40.00% or less, or 37.50% or less, or 35.00% or less, or 32.50% or less, or 30.00% or less, or 27.50% or less, or 25.00% or less, or 22.50% or less, or 20.00% or less, or 17.50% or less, or 15.00% or less, or 12.50% or less, or 10.00% or less, or 7.50% or less, or 5.00% or less, or 2.50% or less, or 2.00% or less, or 1.50% or less, or 1.00% or less, or 0.50% or less by weight of alkali salts.

[0030] additives The cleaning composition may contain one or more additives. The cleaning composition may contain 0 to 20 wt. % of each additive, based on the total weight of the cleaning composition. For example, the cleaning composition may contain 0 wt. % or more, or 1 wt. % or more, or 2 wt. % or more, or 3 wt. % or more, or 4 wt. % or more, or 5 wt. % or more, or 6 wt. % or more, or 7 wt. % or more, or 8 wt. % or more, or 9 wt. % or more, or 10 wt. % or more, or 11 wt. % or more, or 12 wt. % or more, or 13 wt. % or more, or 14 wt. % or more, or 15 wt. % or more, or 16 wt. % or more, or 17 wt. % or more, or 18 wt. % or more, or 19 wt. % or more, based on the total weight of the cleaning composition. The additive may comprise at least 20% by weight, or at most 19% by weight, or at most 18% by weight, or at most 17% by weight, or at most 16% by weight, or at most 15% by weight, or at most 14% by weight, or at most 13% by weight, or at most 12% by weight, or at most 11% by weight, or at most 10% by weight, or at most 9% by weight, or at most 8% by weight, or at most 7% by weight, or at most 6% by weight, or at most 5% by weight, or at most 4% by weight, or at most 3% by weight, or at most 2% by weight, or at most 1% by weight. The additive may comprise one or more diluents, such as propylene glycol and / or other diluents. The additive may comprise one or more antifoaming agents and / or high molecular weight polyglycols. The additive may comprise one or more water-soluble acrylic copolymers. The additive may comprise one or more chelating agents such as ethylenediaminetetraacetic acid ("EDTA"), citric acid, potassium citrate, sodium citrate, tetrasodium ethylenediaminetetraacetic acid, tetrasodium ethylenediaminetetraacetic acid, tetrasodium ethylenediaminetetraacetic acid, diammonium ethylenediaminetetraacetic acid, tetrasodium ethylenediaminetetraacetic acid, tetrasodium ethylenediaminetetraacetic acid tetrahydrate, disodium ethylenediaminetetraacetic acid tetrahydrate, ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetic acid dihydrate, calcium disodium ethylenediaminetetraacetic acid dihydrate, pentasodium diethylenetriaminepentaacetic acid, pentasodium diethylenetriaminepentaacetic acid, trisodium n-(hydroxyethyl)-ethylenediaminetriacetic acid, iron disodium n-(hydroxyethyl)-ethylenediaminetriacetate, ethylenediaminetetraacetic acid, and combinations thereof. [Example]

[0031] material The materials described below were used in forming the inventive examples ("IE") and comparative examples ("CE").

[0032] 2OG is 2-octyl glucoside having structure (I) with an m value of 1.0. 2OG was formed by performing the following steps. First, 2-octanol (36.7 g, 0.282 mol, 1.1 eq) and D-glucose pentaacetate (100 g, 0.256 mol, 1 eq) were dissolved in 300 mL of dichloromethane (DCM) at 23 °C to form a solution. Next, boron trifluoride etherate (40 g, 0.282 mol, 1.1 eq) was added dropwise to the solution over 3 minutes. The solution was magnetically stirred at 23 °C for 48 hours. Next, 150 mL of saturated sodium bicarbonate solution was added to the solution, and the resulting biphasic mixture was shaken until no more effervescence was observed. The biphasic mixture was then transferred to an extraction funnel for separation. The organic phase was then collected, and the aqueous phase was washed with 100 mL of DCM. The separated organic phase was mixed with the previous organic phase. Next, 60 g of sodium sulfate powder was added to the combined organic phase to remove residual water. The resulting organic phase was magnetically stirred for 30 minutes. The formed solid was then filtered, and the organic solvent (DCM) was removed from the dried organic phase under reduced pressure of approximately 20 kPa at 23 °C to obtain a yellow oily crude product. The crude product was dissolved in a mixed solvent (petroleum ether / ethyl acetate 10:1) and purified on a silica gel column (petroleum ether / ethyl acetate 10:1 volume ratio) to remove impurities. The mixed solvent was then distilled off on a rotary evaporator at 20 kPa and 30 °C to obtain a yellow solid product (18 g). The yellow solid product was then subjected to a deacetylation process. 10 grams of the yellow solid product was dissolved in 100 mL of methanol. Next, 30 g of anion exchange resin Amberlite 400 (OH) was added in one portion at 23 °C to form a slurry. The slurry was kept under magnetic stirring at 23 °C overnight. After stirring, all solids were collected by filtration and then rinsed with methanol, which was removed by rotary evaporation at 20 kPa and 35° C. to give 2-octyl glucoside of structure (I).

[0033] APG is isooctyl glucoside having CAS number 125590-73-0 and has the structure (II):

[0034] [ka] where n is 1.4 (i.e., repeating glucose units). APG is commercially available as GREENAPG™ IC-08 from Shanghai Fine Chemical Co., Ltd. (Shanghai, China).

[0035] SURF is a nonionic branched alcohol alkoxylate surfactant having a cloud point of 35° C. and is commercially available as ECOSURF™ LFE-635 from The Dow Chemical Company (Midland, Mich.).

[0036] PG is a 2-octylpolyglucoside with structure (I) and an m value greater than 1.5. PG was formed by performing the following steps. First, 2-octanol (65.1 g, 0.5 mol, 5 eq) and D-glucose (18.0 g, 0.1 mol, 1 eq) were added to a 100 mL flask. Next, para-toluenesulfonic acid (0.344 g, 0.002 mol, 0.02 eq) was added to the flask, and the mixture was heated to 110 °C in an oil bath with magnetic stirring. The flask was slowly depressurized and maintained at 50 kPa to 70 kPa to remove the water generated during the reaction and to avoid evaporation of 2-octanol. The reaction was carried out for 6 h. After completion of the reaction, the pressure was removed, the mixture was cooled to 23 °C, and the pH was adjusted to 7–8 with 2 mol / L aqueous NaOH. Excess 2-octanol was then removed at 90 °C (<1 kPa). A yellow or brown wax-like solid was obtained as the final product. 13 The m value in structure (I) was determined to be 2.35 according to C nuclear magnetic resonance.

[0037] NaOH is an aqueous solution of 80g of sodium hydroxide per liter of water.

[0038] Sample preparation and test methods Hydrotrope Performance Test: An aqueous solution of hydrotrope was first prepared at a 50 wt% active concentration. Based on the total amount of each component in the final test solution (10 mL), 0.5 g of NaOH solid was added to 8.9 g or 8.4 g of water. After complete dissolution, 0.5 g or 1.0 g of the hydrotrope solution (50 wt%) was added to the 5 wt% NaOH solution. This targeted a 2.5 wt% active or 5 wt% active concentration of hydrotrope in the final test solution. Once thoroughly mixed, 0.1 g of SURF was added to the mixture for a 1 wt% active concentration. The test tube was placed in a hot water bath. When the test solution became cloudy in appearance, the tube was removed. The temperature at which the solution changed from cloudy to clear was recorded as its cloud point. This procedure was repeated three times to determine the average cloud point.

[0039] Ross-Miles Foaming Test: The test was conducted in accordance with the Chinese National Standard GB / T13173-2008 Foaming Test. A 0.1 wt% active aqueous solution of the hydrotrope was prepared in deionized water. The Ross-Miles test tube was rinsed with deionized water and the previously prepared sample solution (0.1 wt% active aqueous solution). 50 mL of the sample solution was poured into the test tube. When no more foaming was observed with this first 50 mL of sample solution, 200 mL of sample solution was added using a dropping pipette. The dropper stopper was then opened to allow the solution to flow into the test tube. Once the solution flow had ceased, the initial foam height was recorded as the initial height. At the end of 5 minutes, the foam height was recorded as the final foam height.

[0040] Circulation Foaming Test: A specialized circulation foaming machine was used. All tests were performed at 23°C. Approximately 250 mL of an aqueous surfactant solution (0.1 wt% active SURF) was prepared in a beaker. The solution was stirred until the SURF was completely dissolved in the water, and then poured into a glass test bottle. This injection procedure may produce some foam; the machine was started after the foam had disappeared. The initial volume reading was 5 mL, representing the original liquid volume. (The total volume of foam and liquid was recorded in the test. Because liquid remained on the wall at the end of the test, the final volume reading was likely less than 5 mL.) All tests lasted for 5 minutes. That is, the machine was on for the first minute, and total volume readings were recorded at 15, 30, and 60 seconds. After the machine was turned off for 60 seconds, the total volume was recorded at 75, 90, 2, 3, 4, and 5 minutes.

[0041] 13 C Nuclear Magnetic Resonance: Sample (approximately 0.3 g) was dissolved in DO (0.8 mL) at 23 °C to obtain a homogeneous solution. The resulting solution was added to a 5 mm tube and sent for NMR analysis. All NMR data were obtained using a 100.6 MHz 13 Acquisition was performed at 23°C on a Bruker AVANCE™ II 400 MHz spectrometer operating at the C resonance frequency. A 5 mm BBO probe was used with a 90° observation pulse. 13 The C NMR pulse program was zgig. The recycle delay was set to 14 seconds. The sample was scanned 4000 times. The number of glucose units (PD) was calculated using Equations 1-3: 13 The values ​​were calculated by integrating the corresponding peaks in the C NMR spectrum.

[0042] [ka]

[0043] result Table 3 provides the results of the hydrotrope performance test in a 5 wt% NaOH alkaline environment, Table 4 provides the results of the Ross-Miles foaming test, and Table 5 provides the results of the circulating foam test at 0.5 wt% active content.

[0044] [Table 1]

[0045] Referring now to Table 3, the blank example demonstrates that SURF (1 wt%) is insoluble in 5 wt% aqueous NaOH solutions in the absence of hydrotrope. IE1 demonstrates that the use of a hydrotrope having structure (I) (with a glucose repeat unit value of 1.0) provides the greatest increase in cloud point per unit addition of hydrotrope compared to CE1 and CE2. Thus, the hydrotrope having structure (I) successfully converts a 1 wt% nonionic surfactant solution with an initial cloud point of 35°C in aqueous solution at 23°C from a turbid state (i.e., insoluble) to a clear state, with the cloud point of the formulation increasing to 54-57°C with only 2.5 wt% hydrotrope addition. When the hydrotrope dosage was 5.0 wt%, the cloud point of the formulation with IE1 was greater than 85°C. It can be seen that CE1 (having a glucose repeating unit value of 1.4) is effective in solubilizing SURF by increasing the cloud point of the formulation to 46-47.5°C at a 2.5 wt% dosage and 69-71°C at a 5.0 wt% dosage, while CE2 (having an m value of 2.35 in structure (I)) is unable to solubilize SURF. During testing of CE2, the addition of SURF to the NaOH and hydrotrope solution caused the solution to become cloudy and phase separate within 4 hours.

[0046] [Table 2]

[0047] Referring now to Table 4, IE1 can achieve the desired goal of having an initial foam height of 10 mm or less and 0 mm of foam after 5 minutes. Unlike IE1, CE1 and CE2 show initial foam heights of 25 mm and 18 mm, respectively. Residual foam is also present in CE1 and CE2. As demonstrated by Tables 3 and 4, the hydrotrope of structure (I) can effectively bind SURF to alkaline cleaning compositions, resulting in an initial foam height of 10 mm or less and a foam height of less than 0 mm after 5 minutes according to the Ross-Miles foaming test.

[0048] [Table 3]

[0049] Referring now to Table 5, it is apparent that IE1 performs better in both preventing foam generation during the test and allowing the foam to dissipate more quickly compared to CE1 and CE2.

Claims

1. A cleaning composition, Water and, Surfactants and Structure (I) 【Chemistry 1】 A hydrotrope having structure (I), where m is １３ A cleaning composition comprising hydro and rope, which, when measured by 1C nuclear magnetic resonance, is 1.0 to 1.

2.

2. The cleaning composition according to claim 1, wherein the surfactant is a nonionic surfactant.

3. The cleaning composition according to claim 1, wherein the cleaning composition contains 0.01% to 10.0% by weight of the surfactant based on the total weight of the cleaning composition.

4. The cleaning composition according to claim 1, wherein the cleaning composition comprises an alkali salt.

5. The cleaning composition according to claim 1, wherein the cleaning composition contains 0.1% by weight or more of NaOH based on the total weight of the cleaning composition.

6. The cleaning composition according to claim 1, wherein the cleaning composition contains 0.01% to 20.0% by weight of the hydrotrope.

7. The cleaning composition according to claim 1, wherein the cleaning composition contains 0.5% to 10.0% by weight of the hydrotrope based on the total weight of the cleaning composition.

8. A cleaning composition according to any one of claims 1 to 7, wherein m of structure (I) is 1.0.

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