Liquid aqueous cleaning composition

Abstract

The present invention relates to a liquid aqueous cleaning composition comprising a quaternary ammonium compound, hydrogen peroxide and an organic acid having a pKa of from 1 to 5.5. The composition has a pH of from 2 to 5 and a viscosity of from 1 to 1000 mPa.s @ 20 s at 25°C ‑1 and the composition is free of anionic surfactant.

Description

Technical Field

[0001] This invention relates to liquid aqueous cleaning compositions. More specifically, this invention relates to storage-stable acidic liquid aqueous cleaning compositions comprising hydrogen peroxide. Background Technology

[0002] Cleaning products are well-known and play an important role in daily life. Cleaning products used to clean hygienic hard surfaces such as toilets and other bathroom surfaces such as floors and tiles typically contain disinfectants, and, if necessary, detergents such as surfactants. A commonly used and well-known disinfectant in such products is hypochlorite, as it is a recognized antibacterial and antiviral disinfectant. However, some consumers prefer milder disinfectants because hypochlorite is a strong oxidizing agent and carries the risk of damaging delicate surfaces, and has a strong odor that is not always understood.

[0003] Hydrogen peroxide is sometimes used as an alternative disinfectant in cleaning products for hygienic hard surfaces. Hydrogen peroxide has a less noticeable odor and is generally considered a milder disinfectant. A certain amount of hydrogen peroxide is required to provide adequate disinfection. Hydrogen peroxide is not always stable during storage and may (at least partially) decompose over time during storage, potentially reducing its disinfecting efficacy. To overcome this problem, formulators sometimes use an excess of hydrogen peroxide to compensate for its loss over time. Furthermore, other measures can be taken to stabilize hydrogen peroxide and minimize the losses caused by its decomposition. It is generally understood that the stability of hydrogen peroxide in acidic aqueous compositions increases as the pH decreases.

[0004] Hydrogen peroxide alone may not provide the required broad-spectrum disinfection, and further disinfectants may need to be added to improve the overall disinfection efficacy of the cleaning product. Quaternary ammonium compounds are known to be used in this composition for this purpose. Organic acids, such as citric acid, are also known to be used as disinfectants.

[0005] Cleaning products intended for use on hard surfaces must be able to handle hard water stains. Therefore, such cleaning products may have an acidic pH. Organic acids can be used to achieve the desired acidic pH.

[0006] To increase contact time with hard surfaces, cleaning products can be formulated with a certain viscosity, making them easier to apply and adhere to the surface. For a good user experience, it is important that the cleaning product maintains its initial viscosity over time, such as during storage.

[0007] WO99 / 27066 discloses compositions formulated in an acidic system, optionally containing peroxides, using alkyl aryl detergent compositions in combination with alcohols and / or cationic surfactants and water-soluble solvents.

[0008] Storage stability is an important attribute for cleaning products. That is, the product should maintain its performance throughout its entire lifespan. For example, some ingredients may become less stable over time and / or at elevated temperatures, and formulation engineers can compensate for this loss by including higher amounts of such ingredients. Another example is the product viscosity mentioned above.

[0009] In light of the above, there remains a need to provide milder cleaning compositions that disinfect without compromising consumer satisfaction in terms of performance and / or storage stability. Summary of the Invention

[0010] We have found that acidic liquid aqueous cleaning compositions containing hydrogen peroxide and organic acids must meet specific requirements to provide a mild disinfecting cleaning composition that is stable over time during storage.

[0011] Therefore, in a first aspect, the present invention relates to a liquid aqueous cleaning composition comprising:

[0012] • 0.05 to 1.5 wt% of one or more quaternary ammonium compounds;

[0013] • 0.5 to 4 wt% hydrogen peroxide;

[0014] • 0.25 to 2.5 wt% of organic acids having a pKa of 1 to 5.5;

[0015] The composition described herein has a pH of 2 to 5 and an operating temperature of 1 to 1000 mPa·s at 25°C for 20 seconds. -1 The viscosity of the composition is such that it does not contain anionic surfactants.

[0016] The present invention also relates to a method for cleaning a toilet, the method comprising the following steps:

[0017] a. To bring at least a portion of the toilet surface into contact with the composition according to the invention; and

[0018] b. Optionally rinse the surface with water.

[0019] The present invention also relates to the use of the compositions of the present invention as toilet cleaners or bathroom cleaners. Detailed Implementation

[0020] Any feature of one aspect of the invention may be used in any other aspect of the invention. The word “comprising” is intended to mean “including”, but not necessarily “consisting of” or “made of”. In other words, the listed steps or options need not be exhaustive. Except where explicitly stated in the operational and comparative examples, or elsewhere, all figures indicating the amount of material or reaction conditions, physical properties of the material, and / or uses in this specification should be understood to be modified by the word “about”. Numerical ranges expressed in the form of “x to y” should be understood to include both x and y. When multiple preferred ranges are described in the format of “x to y” for a particular feature, it should be understood that all ranges combining different endpoints are also covered. Unless otherwise stated, quantities used herein are expressed as a weight percentage based on the total weight of the composition and are abbreviated as “wt%”. The use of any and all examples or exemplary language provided herein, such as “such as”, is intended only to better illustrate the invention and not to limit the scope of the invention in any way. Room temperature is defined as a temperature of about 25 degrees Celsius.

[0021] Water-based cleaning composition

[0022] The cleaning composition of the present invention is an aqueous cleaning composition, that is, the composition contains water. The amount of water will depend on the desired concentration of the other components, but will be at least 80 wt%, for example at least 85 wt% or at least 90 wt%, but generally not exceeding 99 wt%. The amount of water is preferably 80-99 wt%, more preferably 80-95 wt%, and even more preferably 85-95 wt%.

[0023] The composition is a liquid, i.e., it can be poured and has a strength of 1 to 1000 mPa·s at 25°C for 20 seconds. -1 Viscosity. Viscosity was measured using an AR1000 rheometer (TA Instruments) with a 4cm diameter and a 2° cone-plate geometry at 20s. -1 The measurements were taken at 25°C. Depending on the desired usage characteristics, the composition may have higher or lower viscosity. For example, if the composition is intended for use in a trigger spray bottle, a more water-thin viscosity is desired. If dispensed from a squeeze bottle, a more viscous consistency may be desired. If the cleaning product is a toilet cleaner, a more viscous viscosity may also be desired. Preferably, the composition has 100 to 700 mPa·s @ 20s. -1 More preferably 200 to 600 mPa·s @ 20s -1 The desired viscosity can be appropriately obtained by known methods, such as using viscosity modifiers.

[0024] Quaternary ammonium compounds

[0025] The aqueous cleaning composition of the present invention contains 0.05 to 1.5 wt% of a quaternary ammonium compound as a disinfectant. Preferably, the composition contains 0.1 to 1 wt%, more preferably 0.2 to 0.8 wt% of the quaternary ammonium compound.

[0026] The combination of quaternary ammonium compounds and hydrogen peroxide provides a wider range of disinfection effects, which are further enhanced when used in combination with organic acids.

[0027] Any quaternary ammonium compound can be used in the technology described in this invention. Examples of quaternary ammonium compounds include, for example, alkyl ammonium halides such as hexadecyltrimethylammonium bromide, alkyl aryl ammonium halides such as octadecyldimethylammonium bromide, and N-alkylpyridinium halides such as N-hexadecylpyridinium bromide. A suitable type of quaternary ammonium compound includes, for example, those in which the molecule contains an amine, ether, or ester bond, such as octylphenoxyethoxyethyl dimethylbenzyl ammonium chloride, N-(dodecylcocarbamoylmethyl)-pyridine chloride, etc. Another effective type of quaternary ammonium compound includes, for example, those in which the hydrophobic group is characterized by a substituted aromatic core, such as dodecyloxyphenyltrimethylammonium chloride, hexadecylaminophenyltrimethylmethylammonium sulfate, dodecylphenyltrimethylmethylammonium sulfate, dodecylbenzyltrimethylammonium chloride, dodecylbenzyltrimethylammonium chloride, etc. Preferably, the quaternary ammonium compounds used in the practice of this technology exhibit biocidal activity or are biocidally active.

[0028] Particularly useful quaternary ammonium compound bactericides include compositions comprising a single quaternary ammonium compound and mixtures of two or more different quaternary ammonium compounds. These useful quaternary compounds are available under the trademarks EMPIGEN, BARDAC, BARQUAT, HYAMINE, LONZABAC, and ONYXIDE, and are more fully described, for example, in McCutcheon's Functional Materials (Vol. 2), North American Edition, 1998, and in corresponding product literature from the following identified suppliers.

[0029] For example, BARDAC 205M is described as a liquid containing alkyl dimethyl benzyl ammonium chloride (benzalkonium chloride, BKC) and octyldecyl dimethyl ammonium chloride; a liquid containing didecyl dimethyl ammonium chloride (DDAC) and dioctyl dimethyl ammonium chloride (50% active material) (also obtainable as 80% active material (BARDAC 208M)); generally described in McCutcheon's as a combination of alkyl dimethyl benzyl ammonium chloride and dialkyl dimethyl ammonium chloride); BARDAC 2050 is described as a combination of octyldecyl dimethyl ammonium chloride, didecyl dimethyl ammonium chloride, and dioctyl dimethyl ammonium chloride (50% active material) (also obtainable as 80% active material (BARDAC 2080)); BARDAC 2250 is described as didecyl dimethyl ammonium chloride (50% active material); BARDAC LF (or BARDAC LF-80) is described as based on dioctyl dimethyl ammonium chloride (BARQUAT) MB-50, MX-50, and OJ-50 (50% liquid each) and MB-80 or MX-80 (80% liquid each) are each described as alkyl dimethyl benzyl ammonium chloride; BARDAC 4250 and BARQUAT 4250Z (50% active material each) or BARQUAT 4280 and BARQUAT 4280Z (80% active material each) are each described as alkyl dimethyl benzyl ammonium chloride / alkyl dimethyl ethyl benzyl ammonium chloride. Furthermore, HYAMINE 1622 is described as diisobutylphenoxyethoxyethyl dimethyl benzyl ammonium chloride (50% solution); HYAMINE 3500 (50% active material) is described as alkyl dimethyl benzyl ammonium chloride (also obtainable at 80% active material (HYAMINE 3500-80)); and HYMAINE 2389 is described as being based on methyldodecylbenzylammonium chloride and / or methyldodecylxyl-bistrimethylammonium chloride.

[0030] (BARDAC, BARQUAT and HYAMINE are currently available from Lonza, Inc., Fairlawn, NJ). BTC50NF (or BTC 65NF) is described as alkyl dimethyl benzyl ammonium chloride (50% active ingredient); BTC 99 is described as dialcyl dimethyl ammonium chloride (50% active ingredient); BTC776 is described as myrisalkonium chloride (50% active ingredient); BTC 818 is described as octyldecyl dimethyl ammonium chloride, dialcyl dimethyl ammonium chloride, and dioctyl dimethyl ammonium chloride (50% active ingredient) (or 80% active ingredient (BTC 818-80%)); BTC824 and BTC 835 are each described as alkyl dimethyl benzyl ammonium chloride (50% active ingredient each); BTC 885 is described as a combination of BTC 835 and BTC 818 (50% active ingredient) (or 80% active ingredient (BTC 888)); BTC1010 is described as dialcyl dimethyl ammonium chloride (50% active ingredient) (or 80% active ingredient (BTC 818-80%)). BTC 2125 (or BTC 2125M) is described as alkyl dimethyl benzyl ammonium chloride and alkyl dimethyl ethyl benzyl ammonium chloride (50% active material each) (also available at 80% active material (BTC 2125 80 or BTC 2125M)); BTC 2565 is described as alkyl dimethyl benzyl ammonium chloride (50% active material) (also available at 80% active material (BTC 2568)); BTC 8248 (or BTC 8358) is described as alkyl dimethyl benzyl ammonium chloride (80% active material) (also available at 90% active material (BTC 8249)); ONYXIDE 3300 is described as n-alkyl dimethyl benzyl saccharin ammonium (95% active material). (BTC and ONYXIDE are currently commercially available from Stepan Company, Northfield, III). Benzyl-C12-14-alkyldimethylammonium chloride and benzyl-C12-C16-alkyldimethyl chloride are also available as EMPIGEN BAC 50 and EMPIGEN BAC 80. These are approximately 50% and 80% aqueous solutions of benzalkonium chloride in water, respectively. EMPIGEN BAC 50 and EMPIGEN 80 are readily biodegradable; EMPIGEN was purchased from Innospec Performance Chemicals.

[0031] Polymerized quaternary ammonium salts based on these monomer structures are also considered desirable in this invention. One example is POLYQUAT, described as a 2-butenyldimethylammonium chloride polymer.

[0032] Preferably, the quaternary ammonium compound is selected from alkyl dimethyl benzyl ammonium chloride (BKC), dialcyl dimethyl ammonium chloride (DDAC), and combinations thereof.

[0033] hydrogen peroxide

[0034] The cleaning composition of the present invention contains 0.5 to 4 wt% hydrogen peroxide. The amount of hydrogen peroxide is chosen such that it, when combined with other present disinfectants, provides sufficient disinfection. The cleaning composition of the present invention provides improved stability of the hydrogen peroxide in the composition. Therefore, less or no excess hydrogen peroxide needs to be prepared to compensate for decomposition over time during storage. Preferably, the composition contains 0.9 to 3 wt% hydrogen peroxide, more preferably 1.5 to 2.5 wt%.

[0035] organic acids

[0036] The cleaning composition contains 0.25 to 2.5 wt% of an organic acid with a pKa of 1 to 5.5. Organic acids are disinfectants and can also help achieve the desired acidic pH. Surprisingly, the combination of organic acids with hydrogen peroxide and quaternary ammonium compounds has been found to provide good disinfection efficacy, but the amount of organic acid should be limited to ensure the stability of hydrogen peroxide over time during storage. The amount of organic acid is preferably 0.5 to 2 wt%, more preferably 1 to 2 wt%.

[0037] Examples of suitable organic acids that can be used in this invention include citric acid (pKa = 3.1), lactic acid (pKa = 3.86), acetic acid (pKa = 4.76), malonic acid (pKa = 2.85), adipic acid (pKa = 4.43), glutaric acid (pKa = 3.76), glycolic acid (pKa = 3.83), maleic acid (pKa = 1.9), succinic acid (pKa = 4.2), malic acid (pKa = 3.4), tartaric acid (... For L+, pKa = 2.89; and for meso, pKa = 3.22), hexanoic acid (pKa = 4.88), cyclohexanoic acid (pKa = 4.82), heptanoic acid (pKa = 4.8), octanoic acid (pKa = 4.89), 4-methyloctanoic acid (pKa = 5.23), nonanoic acid (pKa = 4.95), decanoic acid (pKa = 4.9), benzoic acid (pKa = 4.2), and 4-methoxybenzoic acid (pKa = 4.37).

[0038] Preferably, the pKa of the organic acid is 2 to 4.8, more preferably 3 to 4.

[0039] Preferred organic acids are citric acid, lactic acid, acetic acid, malonic acid, adipic acid, glutaric acid, glycolic acid, maleic acid, and combinations thereof. More preferably, the organic acid is selected from citric acid, lactic acid, glycolic acid, and combinations thereof. Citric acid is a preferred organic acid.

[0040] pH value

[0041] The aqueous cleaning composition of the present invention is an acidic cleaning composition with a pH of 2 to 5. An acidic pH helps to resolve hard water stains. It has been found that the pH of the composition should not be low, otherwise this may adversely affect the stability of hydrogen peroxide. Preferably, the pH is 2 to 4, more preferably 2 to 3. In addition to currently available organic acids, suitable pH adjusters such as hydrochloric acid and NaOH can be used to obtain the desired pH of the composition.

[0042] Water-soluble rheology-modified polymers

[0043] To achieve the desired viscosity, the cleaning composition may contain 0.01 to 1 wt% of a water-soluble rheology-modified polymer. Rheology-modified polymers are known, and their ability to impart viscosity to the composition may depend in part on the presence or absence of other components.

[0044] Water-soluble polymers, including nonionic, cationic, and amphoteric polymers, can be used in thickening compositions. Suitable polymers include hydroxyethyl cellulose, modified hydroxyethyl cellulose, guar gum, tragacanth gum, gum arabic, acacia gum, etc. C 13S, C 14S C 17、 HP105 (Hydroxypropyl Guar Gum) HP60 (hydroxypropylated guar gum) S (natural guar gum) AquaCC, Merquat TM 100. Merquat TM 280. Merquat TM 281 and Merquat TM 550 (from Lubrizol) and polyethylene glycol such as Polyox TM WSR-205 (PEG 14), Polyox TM WSR N-60K (PEG 45) and Polyox TM WSR-301(PEG90).

[0045] The cleaning compositions of the present invention contain quaternary ammonium compounds with cationic properties; therefore, the polymer is preferably a nonionic, water-soluble polymer, more preferably a hydroxyethyl cellulose-based polymer. A preferred polymer is hydrophobically modified hydroxyethyl cellulose. An example of a suitable polymer is PolySurf. TM 67CS, or hexadecyl hydroxyethyl cellulose.

[0046] surfactants

[0047] In addition to disinfectants, cleaning compositions may further include surfactants to act as cleaning agents.

[0048] Amphoteric surfactants

[0049] The composition preferably contains 0.1 to 5 wt% of an amphoteric surfactant, for example, 0.2 to 4 wt%. More preferably, the amount of the amphoteric surfactant is 0.3 to 3 wt%, and even more preferably 0.5 to 2 wt%. Suitable amphoteric surfactants include amine oxides and betaine.

[0050] Amine oxide

[0051] Preferred amine oxides are alkyl dimethyl amine oxide and alkylamidopropyl dimethyl amine oxide, more preferably alkyl dimethyl amine oxide. Particularly preferred are lauryl dimethyl amine oxide, cocamidopropyl dimethyl amine oxide, and cocamidopropyl dimethyl amine oxide.

[0052] betaine

[0053] The preferred amphoteric surfactant is betaine. Suitable betaines include alkyl betaine, alkylamido betaine, alkylamidopropyl betaine, alkyl sulfono betaine, and alkyl phosphate betaine, wherein the alkyl group preferably has 8-19 carbon atoms.

[0054] Examples include cocamidopropyl betaine, hexadecyl betaine, laurylamidopropyl betaine, caprylic / decanoic betaine, capryloyl / capryloamidopropyl betaine, cocamidopropyl hydroxysulfonyl betaine, cocamidopropyl hydroxysulfonyl betaine, and preferably lauryl betaine, cocamidopropyl betaine, and sodium cocamidopropyl propionate. Preferably, the betaine is cocamidopropyl betaine (CAPB).

[0055] Nonionic surfactants

[0056] The composition preferably contains 0.01 to 3 wt% of a nonionic surfactant. More preferably, the amount of nonionic surfactant is 0.2 to 2 wt%, and even more preferably 0.3 to 1.5 wt%.

[0057] alcohol ethoxylates

[0058] Preferably, the nonionic surfactant is an alcohol ethoxylate. Suitable alcohol ethoxylate surfactants include condensation products of higher alcohols (e.g., linear or branched alkanols containing about 8 to 18 carbon atoms) condensed with about 5 to 30 moles of ethylene oxide, such as lauryl alcohol or myristol condensed with about 16 moles of ethylene oxide (EO), tridecanol condensed with about 6 moles of EO, myristol condensed with about 10 moles of EO per mole of myristol, condensation products of EO with a coconut oil fatty alcohol fraction containing a mixture of fatty alcohols with an alkyl chain length of about 10 to 14 carbon atoms, and wherein the condensate contains about 6 moles of EO per mole of total alcohol or about 9 moles of EO per mole of alcohol, and tallow alcohol ethoxylates containing 6 to 11 moles of alcohol. Particularly preferred are lauryl alcohols condensed with 5, 7, and 9 moles of ethylene oxide (lauryl alcohol polyether 5, lauryl alcohol polyether 7, and lauryl alcohol polyether 9). Preferably, the alcohol ethoxylated surfactant is selected from lauryl alcohol polyether 5, lauryl alcohol polyether 7 and lauryl alcohol polyether 9, or a mixture thereof.

[0059] Condensations of 2 to 30 moles of ethylene oxide with sorbitan mono- and tri-C10-C20 alkyl esters (with 10 to 15 HLB) can also be used as nonionic surfactants. These surfactants are well known and are available from Imperial Chemical Industries under the trademark Tween. Suitable surfactants include polyoxyethylene (4) sorbitan monolaurate, polyoxyethylene (4) sorbitan monostearate, polyoxyethylene (20) sorbitan trioleate, and polyoxyethylene (20) sorbitan tristearate.

[0060] Ethoxylated amines

[0061] Preferably, the cleaning composition is free of ethoxylated amine nonionic surfactants. Ethoxylated amine surfactants, for example, can be marketed under various trade names. Obtained from Nouryon.

[0062] Anionic surfactants

[0063] The cleaning composition does not contain anionic surfactants, as they may interfere with the biocidal activity of quaternary ammonium compounds.

[0064] Preferably, "free of anionic surfactant" as used herein means that the composition contains less than 0.2 wt%, more preferably less than 0.1 wt%, even more preferably less than 0.05 wt%, and most preferably less than 0.01 wt% of anionic surfactant.

[0065] The preferred composition does not contain anionic surfactants.

[0066] Further components

[0067] The cleaning composition may contain further ingredients such as fragrances and colorants. To enhance the environmental properties of the cleaning composition, it is preferable that the composition is free of organic solvents, such as alcohol-based solvents, ether-based solvents, and ester-based solvents.

[0068] Water-soluble

[0069] The composition may also contain one or more co-hydraulic solvents. Co-hydraulic solvents are a class of low molecular weight compounds that facilitate the solubilization of hydrophobic components in aqueous solutions. Typically, co-hydraulic solvents contain both hydrophilic and hydrophobic portions, similar to surfactants; however, their hydrophobic portions are much smaller than those of surfactants. Therefore, they may not lead to spontaneous self-aggregation or micellar solubilization. Co-hydraulic solvents have also been observed to lack the critical micelle concentration (CMC) or critical vesicle concentration (CVC) of surfactants. It is possible that co-hydraulic solvents aggregate during a stepwise self-aggregation process, gradually increasing the aggregate size. Examples of co-hydraulic solvents suitable for use in this invention include urea, toluenesulfonates, adenosine triphosphate (ATP), cumenesulfonates, and xylenesulfonates.

[0070] Product Form

[0071] The composition can be packaged in any or commercially available bottle for storing liquids. Bottles containing liquids can have different sizes and shapes to hold different volumes of liquid; preferably 0.25 to 5 L, more preferably 0.25 to 1.5 L, or even 0.25 to 1 L. The bottle is preferably equipped with a dispenser, which allows the consumer to more easily disperse the liquid. Foam, spray, or pump dispensers can also be used.

[0072] method

[0073] The present invention also relates to a method for cleaning a toilet, the method comprising the following steps:

[0074] a. To bring at least a portion of the toilet surface into contact with the composition according to the invention; and

[0075] b. Optionally rinse the surface with water.

[0076] In another aspect, the present invention relates to the use of the compositions of the present invention as toilet cleaners or bathroom cleaners.

[0077] The compositions of the present invention are applied to hard surfaces in pure or diluted form. The compositions can be applied by any known means, such as by using cleaning tools, such as brushes, sponges, cloths, wipes, or any other direct or indirect application. The applied compositions can be cleaned with or without water using cleaning tools (such as brushes, sponges, paper, cloths, or wipes), or rinsed away with water, optionally running water.

[0078] The invention will now be described through the following non-limiting embodiments.

[0079] Example

[0080] Using an AR1000 rheometer (TA Instrument), with a 4cm, 2° cone-plate geometry, the results were obtained in 20s. -1 The viscosity of the liquid composition was determined at 25°C. The pH of the liquid composition was measured using an Orion Versa Star (Thermo Scientific) pH meter. The hydrogen peroxide level was measured by titration with potassium permanganate. Oxalic acid was used as the primary standard.

[0081] The effect of organic acids on product stability

[0082] The formulations were prepared according to Table 1 and stored at 25°C and 37°C. Measurements were taken at 25°C for 20 seconds at given intervals (days). -1 The viscosity (mPa.s) is shown in Table 2.

[0083] Table 1 (wt%, calculated based on total product)

[0084]

[0085]

[0086] Polysurf TM 67cs is from Ashland

[0087] Table 2 - Viscosity (mPa.s) measured at specific intervals (days) at 25°C @ 20s -1

[0088]

[0089] The levels of hydrogen peroxide were estimated after 30 and 60 days of storage, and the data are shown in Table 3.

[0090] Table 3 - Data on the stability of hydrogen peroxide

[0091]

[0092]

[0093] The effect of pH on product stability

[0094] The formulations were prepared according to Table 4 and stored at 37°C. After 6 weeks, pH and viscosity (mPA.s) at 25°C @ 20s were measured. -1and hydrogen peroxide levels. The results are shown in Table 5.

[0095] Table 4 (wt%, calculated based on total product)

[0096]

[0097] 2010 from Thermphos

[0098] Table 5 - Storage stability results (stored at 37°C for 6 weeks)

[0099]

[0100]

[0101] Effect of formulation components on the stability of hydrogen peroxide

[0102] Formulations were prepared according to Table 6 to demonstrate the effect of different components on the stability of hydrogen peroxide at pH 1 and pH 2.15 when stored at 37°C. Hydrogen peroxide levels were measured after 2.5 months. Results for the pH 2.15 formulation are shown in Table 7, and results for the pH 1 formulation are shown in Table 8.

[0103] Table 6 (wt%, calculated based on total product)

[0104]

[0105]

[0106] Table 7 - Hydrogen peroxide stability at pH 2.15

[0107]

[0108] Table 8 - Hydrogen peroxide stability at pH 1

[0109]

Claims

1. A liquid aqueous cleaning composition comprising: • 0.05 to 1.5 wt% of one or more quaternary ammonium compounds, wherein the quaternary ammonium compounds are selected from dialcyldimethylammonium chloride, dioctyldimethylammonium chloride, alkyldimethylbenzylammonium chloride, diisobutylphenoxyethoxyethyldimethylbenzylammonium chloride, alkyldimethylbenzylsaccharin ammonium, octyldecyldimethylammonium chloride, alkyldimethylethylbenzylammonium chloride, methyldodecylbenzylammonium chloride, methyldodecylxyl-bis-trimethylammonium chloride, methylbenzylammonium chloride, hexadecylpyridine chloride, cetrimonium bromide, and combinations thereof; • 0.5 to 4 wt% hydrogen peroxide; • 0.25 to 2 wt% pK a The organic acid is 1 to 5.5, wherein the organic acid is selected from citric acid, lactic acid, acetic acid, malonic acid, adipic acid, glutaric acid, glycolic acid, maleic acid, and combinations thereof; The composition described herein has a pH of 2 to 5 and an operating temperature of 1 to 1000 mPa·s at 25°C for 20 s. -1 The viscosity; wherein the composition does not contain anionic surfactants; and The composition optionally comprises: • 0.1 to 5 wt% amphoteric surfactant; • 0.01 to 3 wt% of nonionic surfactant; and • 0.01 to 1 wt% of water-soluble rheology-modified polymers.

2. The composition according to claim 1, wherein the pK of the organic acid is... a The values ​​range from 2 to 4.

8.

3. The composition according to claim 1 or 2, wherein the pK of the organic acid is... a It is between 3 and 4.

4. The composition according to claim 1 or 2, wherein the organic acid is citric acid.

5. The composition according to claim 1 or 2, wherein the organic acid is selected from citric acid, lactic acid, glycolic acid, and combinations thereof.

6. The composition according to claim 1 or 2, wherein the quaternary ammonium compound is benzalkonium chloride.

7. The composition according to claim 1 or 2, wherein the quaternary ammonium compound is alkyl dimethyl benzyl ammonium chloride, dialcyl dimethyl ammonium chloride (DDAC), or a combination thereof.

8. The composition according to claim 1 or 2, comprising 0.1 to 5 wt% of an amphoteric surfactant.

9. The composition according to claim 8, wherein the amphoteric surfactant is betaine.

10. The composition according to claim 8, wherein the amphoteric surfactant is cocamidopropyl betaine (CAPB).

11. The composition according to claim 1 or 2, comprising 0.01 to 3 wt% of a nonionic surfactant.

12. The composition according to claim 11, wherein the nonionic surfactant is an alcohol ethoxylate.

13. The composition according to claim 1 or 2, comprising 0.01 to 1 wt% of a water-soluble rheology-modified polymer.

14. The composition according to claim 1 or 2, wherein the polymer is a nonionic water-soluble polymer.

15. The composition according to claim 1 or 2, wherein the polymer is hydrophobically modified hydroxyethyl cellulose.

16. The composition according to claim 1 or 2, wherein the composition is free of organic solvents.

17. The composition according to claim 1 or 2, wherein the pH of the composition is 2 to 4.

18. The composition according to claim 1 or 2, wherein the pH of the composition is 2 to 3.

19. The composition according to claim 1 or 2, wherein the composition has a strength of 100 to 700 mPa·s @ 20 s. -1 viscosity.

20. The composition according to claim 1 or 2, wherein the composition has a strength of 200 to 600 mPa·s @ 20 s. -1 viscosity.

21. The composition according to claim 1 or 2, wherein the composition comprises 0.5 to 2 wt% of the organic acid.

22. The composition according to claim 1 or 2, wherein the composition comprises 1 to 2 wt% of the organic acid.

23. A method for cleaning a toilet, comprising the following steps: a. To bring at least a portion of the surface of the toilet into contact with the composition according to any one of claims 1-22; as well as b. Optionally, rinse the surface with water.

24. Use of the composition according to any one of claims 1-22 as a toilet cleaner or bathroom cleaner.

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