An engine exterior cleaner, its preparation method and application

Abstract

This invention provides an engine cleaner containing a surfactant and water. The surfactant is sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether. Based on 100 parts by weight of the total cleaner, the sodium lauryl sulfate comprises 3.0-50.0 parts by weight, the cetyl polyoxyethylene ether comprises 3.0-50.0 parts by weight, the nonylphenol polyoxyethylene ether comprises 3.0-50.0 parts by weight, and the total mass of the surfactants comprises 10.0-80.0 parts by weight. This invention also provides a method for preparing the engine cleaner. The engine cleaner of this invention has a high cloud point, a short penetration time on the dirt surface, requires less water for thorough cleaning, does not produce a large amount of waste liquid, and does not pollute the ground.

Description

Technical Field

[0001] This invention relates to the field of industrial equipment cleaning agents, specifically to an engine external cleaning agent, its preparation method, and its application. Background Technology

[0002] Passenger boarding stairs, passenger shuttle buses, baggage handling vehicles, and cargo lifting platforms are indispensable heavy equipment for ground operations support of civil aviation flights. These vehicles operate for extended periods in the tarmac environment. Busy flight operations force these high-value special vehicles to operate under heavy loads for long periods, leading to excessive wear and tear, oil buildup, and leaks. This seriously affects vehicle operation safety and can even cause serious accidents such as vehicle fires or collisions with aircraft. Due to the heavy workload of flight operations and the special structure of these vehicles, they cannot frequently enter and exit the tarmac to clean external engine oil stains. Taking the high-value cargo lifting platform vehicle on the apron as an example: (1) Due to the special air defense environment of the apron, there are high requirements for the cleanliness of the apron floor. Traditional engine external cleaners will cause a large amount of oil to drip onto the apron floor during the cleaning process, resulting in apron pollution. Airports usually impose heavy penalties on units that cause apron pollution, so conventional heavy oil cleaners cannot be used on the apron; (2) For high-value lifting platform vehicles, the journey between the repair shop and the apron is long each time. Due to its special structure, the rear wheels of the platform vehicle cannot travel on bumpy roads. Each round trip may cause the rear wheels to be scrapped. Therefore, the lifting platform vehicle generally does not leave the airside operation area except for major maintenance and other special reasons, thus becoming a major oil pollution disaster area in the cabin.

[0003] In the early days, limited by outdated chemical production technology, the external cleaning of engines for special vehicles on the tarmac mainly relied on solvents such as gasoline, diesel, and alcohol, which have similar chemical properties to the oil stains on the engine's exterior. However, this method was ineffective, costly, environmentally unfriendly, and prone to fire and even explosion hazards. Later, with the large-scale popularization of the alkali industry and the widespread application of industrial caustic soda, high-temperature alkaline solvents began to be used for cleaning engine oil stains. Strong alkaline cleaning agents, under high-temperature conditions, produce a strong emulsification effect with the oil stains on the engine's external surface, dissolving the oil stains in an aqueous solution, which is then removed by high-pressure water jets. However, this method is highly corrosive, easily damaging the engine's metal and rubber parts; it generates waste liquid that severely pollutes the environment, making it environmentally unfriendly; it has low cleaning efficiency, high energy consumption, and cannot clean complex parts.

[0004] In recent years, with the rapid development of the fine chemicals industry, specialized cleaning agents for various cleaning fields have been continuously enriched and improved, and a variety of external cleaning agents specifically for motor vehicle engines have also been launched. Engine external cleaning agents prepared by compounding multiple functional reagents possess characteristics such as strong detergency, high efficiency, environmental friendliness, and simple operation. After the compounded cleaning agent penetrates and emulsifies the grease, it can be rinsed with a high-pressure water gun to remove oil stains. However, most cleaning agents on the market require large amounts of water to rinse during use, resulting in oil stains that pollute the apron environment, affecting flight safety. This is time-consuming, labor-intensive, and costly, making it unsuitable for cleaning special vehicle engines in apron environments. For example, application number CN201610791126.4 provides "an engine external cleaning agent," but the cleaning agent prepared by this invention requires a large amount of water to rinse the stains during the cleaning process, generating a large amount of waste liquid that pollutes the ground.

[0005] Therefore, there is an urgent need to develop a special vehicle engine compartment cleaner based on the apron usage environment. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the prior art, such as the need for water rinsing to clean external oil stains on apron vehicle engines, resulting in a large amount of oil stains polluting the apron. This invention provides an external engine cleaning agent that only needs to be sprayed onto the oil stain surface and allowed to penetrate before cleaning, eliminating the need for high-pressure water rinsing, and producing no large amounts of waste liquid or polluting the ground.

[0007] This invention first provides an engine cleaner containing a surfactant and water; wherein the surfactant is sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether; based on 100 parts by weight of the total cleaner, the sodium lauryl sulfate comprises 3.0-50.0 parts by weight, the cetyl polyoxyethylene ether comprises 3.0-50.0 parts by weight, the nonylphenol polyoxyethylene ether comprises 3.0-50.0 parts by weight, and the total mass of the surfactant comprises 10.0-80.0 parts by weight.

[0008] In one or more embodiments, the total mass of the surfactant is 10.0-35.0 parts by mass, based on 100 parts by mass of the total weight of the detergent; wherein the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether and nonylphenol polyoxyethylene ether is 1:(1-10):1, such as 1:(1-6):1, 1:(2-4):1 or 1:(3-5):1.

[0009] In one or more embodiments, the total mass of the surfactant is 25.0-30.0 parts by mass based on 100 parts by mass of the total detergent; wherein the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether and nonylphenol polyoxyethylene ether is (1-2):3:(1-2).

[0010] In one or more embodiments, the total mass of the surfactant is 55.0-80.0 parts by mass based on 100 parts by mass of the total detergent; wherein the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether and nonylphenol polyoxyethylene ether is (10-1):(1-10):(1-10).

[0011] In one or more embodiments, the cleaning agent further comprises one or more of polyethylene glycol, corrosion inhibitors, wax polishes, and chelating agents.

[0012] In one or more embodiments, the corrosion inhibitor is benzotriazole and / or mercaptobenzothiazole.

[0013] In one or more embodiments, the wax polish is a plant wax or microcrystalline wax, preferably carnauba wax and / or cinnamon wax.

[0014] In one or more embodiments, the chelating agent is sodium citrate and / or EDTA-disodium.

[0015] In one or more embodiments, the corrosion inhibitor comprises 0.5-2.0 parts by weight, preferably 1.0-1.5 parts by weight, based on 100 parts by weight of the total cleaning agent.

[0016] In one or more embodiments, the wax polish is 5.0-10.0 parts by weight, based on 100 parts by weight of the total cleaning agent.

[0017] In one or more embodiments, the chelating agent comprises 0.3-5.0 parts by weight, preferably 0.3-3.0 parts by weight, based on 100 parts by weight of the total detergent.

[0018] In one or more embodiments, the cleaning agent comprises the following components:

[0019] Sodium lauryl sulfate 4.5-10.0 parts by weight

[0020] Cetyl alcohol polyoxyethylene ether 4.5-25.0 parts by weight

[0021] Nonylphenol polyoxyethylene ether, 4.5-10.0 parts by weight.

[0022] 8.0-12.0 parts by weight of polyethylene glycol

[0023] 0.5-2.0 parts by weight of mercaptobenzothiazole

[0024] 0.5-1.5 parts by weight of disodium EDTA.

[0025] Sodium citrate 1.0-2.0 parts by weight,

[0026] Carnauba wax 5.0-10.0 parts by weight, and

[0027] The remaining water;

[0028] In one or more embodiments, sodium lauryl sulfate comprises 4.5-5.0 parts by weight.

[0029] Cetyl alcohol polyoxyethylene ether 45.0-50.0 parts by weight

[0030] Nonylphenol polyoxyethylene ether, 4.5-5.0 parts by weight

[0031] 8.0-11.0 parts by weight of polyethylene glycol

[0032] 1.0-1.5 parts by weight of mercaptobenzothiazole

[0033] EDTA-disodium 0.9-1.2 parts by weight

[0034] Sodium citrate 1.0-2.0 parts by weight,

[0035] Carnauba wax 5.0-8.0 parts by weight, and

[0036] The remaining water.

[0037] In one or more embodiments, the cleaning agent comprises the following components:

[0038] Sodium lauryl sulfate 45.0-50.0 parts by weight

[0039] Cetyl alcohol polyoxyethylene ether 4.5-25.0 parts by weight

[0040] Nonylphenol polyoxyethylene ether, 4.5-5.0 parts by weight

[0041] 8.0-11.0 parts by weight of polyethylene glycol

[0042] 1.0-1.5 parts by weight of mercaptobenzothiazole

[0043] EDTA-disodium 0.9-1.2 parts by weight

[0044] Sodium citrate 1.0-2.0 parts by weight,

[0045] Carnauba wax 5.0-8.0 parts by weight, and

[0046] The remaining water.

[0047] In one or more embodiments, the cleaning agent comprises the following components:

[0048] Sodium lauryl sulfate 4.5-5.0 parts by weight

[0049] Cetyl alcohol polyoxyethylene ether 4.5-5.0 parts by weight

[0050] Nonylphenol polyoxyethylene ether, 45.0-50.0 parts by weight.

[0051] 8.0-11.0 parts by weight of polyethylene glycol

[0052] 1.0-1.5 parts by weight of mercaptobenzothiazole

[0053] EDTA-disodium 0.9-1.2 parts by weight

[0054] Sodium citrate 1.0-2.0 parts by weight,

[0055] Carnauba wax 5.0-8.0 parts by weight, and

[0056] The remaining water.

[0057] The present invention also provides a method for preparing a cleaning agent as described in any embodiment herein, the method comprising the following steps: first adding sodium lauryl sulfate and cetyl polyoxyethylene ether to water, stirring until completely dissolved, and then adding nonylphenol polyoxyethylene ether and the remaining other ingredients.

[0058] In one or more embodiments, the temperature of the water is 30-80°C, preferably 40-60°C. Before adding the nonylphenol polyoxyethylene ether and the remaining components, the mixed solution is cooled down to 20-40°C, preferably 25-35°C or 30-35°C.

[0059] The present invention also provides the application of sodium lauryl sulfate, cetyl polyoxyethylene ether and nonylphenol polyoxyethylene ether in the preparation of engine cleaners and in cleaning engines, characterized in that, in the cleaner, the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether and nonylphenol polyoxyethylene ether is 1:(1-10):1, such as 1:(1-6):1 or 1:(2-4):1 or 1:(3-5):1.

[0060] In one or more embodiments, the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is (1-2):3:(1-2), such as 1:3:2 or 2:3:1.

[0061] In one or more embodiments, the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is 10:5:1, 10:1:1, 1:1:10, or 1:10:1.

[0062] In one or more embodiments, the cleaning agent further contains polyethylene glycol.

[0063] The present invention also provides a method for reducing the penetration time of cleaning agents and reducing the amount of water used for thorough cleaning, wherein the cleaning agent contains sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether, and the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is 1:(1-10):1, such as 1:(1-6):1, 1:(2-4):1, or 1:(3-5):1.

[0064] In one or more embodiments, the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is (1-2):3:(1-2), such as 1:3:2 or 2:3:1.

[0065] In one or more embodiments, the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is 10:5:1, 10:1:1, 1:1:10, or 1:10:1.

[0066] In one or more embodiments, the cleaning agent further contains polyethylene glycol.

[0067] In one or more embodiments, the permeation time is ≤20 min, such as ≤15 min or 10 min, more preferably ≤5 min.

[0068] In one or more embodiments, the water consumption for thorough cleaning is ≤3.0L, such as ≤1.5L or ≤1.0L, more preferably ≤0.5L.

[0069] In one or more embodiments, the cloud point is ≥70°C, such as ≥75°C or ≥80°C, more preferably ≥95°C. Detailed Implementation

[0070] To enable those skilled in the art to understand the features and effects of the present invention, the terms and expressions used in the specification and claims are explained and defined in general below. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning understood by those skilled in the art regarding the present invention, and in case of conflict, the definitions in this specification shall prevail.

[0071] The theories or mechanisms described and disclosed herein, whether right or wrong, should not in any way limit the scope of the invention, that is, the contents of the invention can be implemented without being limited by any particular theory or mechanism.

[0072] In this document, the terms “contains,” “includes,” “containing,” and similar terms encompass the meanings of “basically composed of” and “composed of.” For example, when this document discloses “A contains B and C,” “A is basically composed of B and C” and “A is composed of B and C” should be considered as having been disclosed in this document.

[0073] In this document, all features defined by numerical ranges or percentage ranges, such as numerical values, quantities, contents, and concentrations, are for the sake of brevity and convenience only. Accordingly, descriptions of numerical ranges or percentage ranges should be considered as covering and specifically disclosing all possible sub-ranges and individual numerical values ​​(including integers and fractions) within those ranges.

[0074] Unless otherwise specified, percentage refers to mass percentage, proportion refers to mass ratio, and part refers to mass part.

[0075] In this document, when describing embodiments or examples, it should be understood that it is not intended to limit the invention to those embodiments or examples. Rather, all alternatives, modifications, and equivalents of the methods and materials described herein are covered within the scope defined by the claims.

[0076] In this article, the sum of the percentages of all components in the composition is 100%.

[0077] For the sake of brevity, not all possible combinations of the technical features in each implementation scheme or embodiment are described herein. Therefore, as long as there is no contradiction in the combination of these technical features, the technical features in each implementation scheme or embodiment can be combined arbitrarily, and all possible combinations should be considered within the scope of this specification.

[0078] Most existing cleaning agents require high-pressure water rinsing, resulting in a large water consumption and a significant amount of waste liquid for the same cleaning time, which is time-consuming and labor-intensive to handle. However, the inventors of this invention, through in-depth research, discovered that a compound of the anionic surfactant sodium lauryl sulfate (SLS), the nonionic surfactant cetyl polyoxyethylene ether (A-25), and the nonionic surfactant nonylphenol polyoxyethylene ether (NP) can effectively reduce penetration time, improve cleaning efficiency, and prevent staining and floor contamination.

[0079] Therefore, the present invention provides an engine cleaner comprising: a surfactant, polyethylene glycol, optionally one or more of a corrosion inhibitor, a wax polish, and a chelating agent, and the balance being water. In some embodiments, the engine cleaner comprises: sodium lauryl sulfate, cetyl polyoxyethylene ether, nonylphenol polyoxyethylene ether, polyethylene glycol, optionally one or more of a corrosion inhibitor, a wax polish, and a chelating agent, and the balance being water.

[0080] The surfactants suitable for use in this invention should be surfactants with excellent cleaning performance and strong detergency, preferably anionic surfactants and nonionic surfactants. The preferred anionic surfactant is sodium lauryl sulfate, and the preferred nonionic surfactant is one known in the art, preferably cetyl alcohol polyoxyethylene ether and nonylphenol polyoxyethylene ether.

[0081] In some implementations, based on 100 parts by weight of the detergent, the total mass of surfactants is 10.0-80.0 parts by weight, of which SLS is 3.0-50.0 parts by weight, A-25 is 3.0-50.0 parts by weight, and NP is 3.0-50.0 parts by weight.

[0082] In some implementations, the total mass of surfactants is 10.0-35.0 parts by mass per 100 parts by mass of the detergent, wherein the mass ratio of SLS, A-25 and NP is 1:(1-10):1, such as 1:(1-6):1, 1:(2-4):1 or 1:(3-5):1.

[0083] In some implementations, the total mass of surfactants is 25.0-30.0 parts by mass per 100 parts by mass of detergent, wherein the mass ratio of SLS, A-25 and NP is (1-2):3:(1-2), for example 1:3:2 or 2:3:1.

[0084] In some implementations, the total mass of surfactants is 55.0-80.0 parts by mass per 100 parts by mass of the detergent, wherein the mass ratio of SLS, A-25 and NP is 10:5:1, 10:1:1, 1:1:10, or 1:10:1.

[0085] In the cleaning agent of the present invention, the organic co-solvent is polyethylene glycol, and the mass of polyethylene glycol is 8.0-12.0 parts by mass, such as 8.0-10.0 parts by mass or 9.0-12.0 parts by mass, based on 100 parts by mass of the total weight of the cleaning agent.

[0086] The corrosion inhibitors suitable for use in this invention are known in the art and can be benzotriazole, mercaptobenzothiazole, or preferably mercaptobenzothiazole. Using mercaptobenzothiazole as a corrosion inhibitor can slow down the corrosion rate of the metal material in the medium, maintaining the original physicochemical properties of the metal material. In some embodiments, based on 100 parts by weight of the total cleaning agent, the mass of the corrosion inhibitor can be 0.5-2.0 parts by weight, preferably 1.0-1.5 parts by weight, for example 1.1 parts by weight, 1.2 parts by weight, 1.3 parts by weight, or 1.4 parts by weight.

[0087] The wax polish is known in the art, such as plant wax or microcrystalline wax, preferably selected from at least one of carnauba wax and beeswax. The wax polish can be adsorbed onto the metal surface under cationic action, protecting the metal casing and reducing UV damage. Typically, waxes need to be heated and emulsified into an oil-in-water emulsion before they can be formulated with other aqueous components, or they can be directly emulsified using an emulsifier. In some embodiments, the wax polish comprises 5.0-10.0 parts by weight of 100 parts by weight of the total cleaning agent.

[0088] The chelating agent suitable for use in this invention should be a chelating agent with strong dispersing ability and strong anti-redeposition ability, preferably sodium citrate and / or disodium ethylenediaminetetraacetate (EDTA-disodium). Based on 100 parts by weight of the total detergent, the mass of the chelating agent can be 0.3-5.0 parts by weight, preferably 0.3-3.0 parts by weight. Using sodium citrate and EDTA-disodium as chelating agents can significantly enhance the detergency of the detergent, and sodium citrate is biodegradable and environmentally friendly.

[0089] In some embodiments, the chelating agents are disodium EDTA and sodium citrate, with 0.5-1.5 parts by weight of disodium EDTA and 1.0-1.5 parts by weight of sodium citrate per 100 parts by weight of the total detergent.

[0090] Deionized water is used as the base solvent. It should be understood that in the cleaning agents of this invention, the water is of the grade and hardness and grain level required for cleaning agents in the art. When using the cleaning agents of this invention, the cleaning agents in most application scenarios will include water, and the sum of the water content and the content of the above-mentioned components will be 100%.

[0091] The cleaning agents of the present invention may be provided in solid, liquid, gel, or combination thereof, or in two or more forms. In some embodiments, the cleaning agents of the present invention are provided as concentrates such that the cleaning agent composition is substantially free of any added water, or the concentrate may contain a standard weight of water. The concentrate may be formulated without any water, or may be provided with a relatively small amount of water to reduce the cost of transporting the concentrate. For example, in the form of compressed powder, capsules of solid or loose powder, or beads encapsulated in soluble material. For the purposes of this disclosure, the terms "capsule" and "bead" are used for illustrative purposes and are not intended to limit the specific shape or form of transport of the invention. In some embodiments, the cleaning agents of the present invention are provided in solid form, which dissolves and solubilizes upon contact with a solvent, or otherwise disintegrates, thereby allowing the cleaning agent to become a usable cleaning agent for further application to the surface to be cleaned.

[0092] Therefore, in some embodiments, the cleaning agent as described in any embodiment of the present invention can be diluted to form a solution. When diluted into a solution, the dilution can be performed as needed, for example, by a dilution factor of 3 to 50 times.

[0093] In some embodiments, the components and quantities of the cleaning agent of the present invention are as follows:

[0094] Sodium lauryl sulfate 4.5-10.0 parts by weight

[0095] Cetyl alcohol polyoxyethylene ether 4.5-25.0 parts by weight

[0096] Nonylphenol polyoxyethylene ether, 4.5-10.0 parts by weight.

[0097] 8.0-12.0 parts by weight of polyethylene glycol

[0098] 0.5-2.0 parts by weight of mercaptobenzothiazole

[0099] 0.5-1.5 parts by weight of disodium EDTA.

[0100] Sodium citrate 1.0-2.0 parts by weight,

[0101] Carnauba wax 5.0-10.0 parts by weight, and

[0102] The remaining water.

[0103] In some embodiments, the components and quantities of the cleaning agent of the present invention are as follows:

[0104] Sodium lauryl sulfate 4.5-5.0 parts by weight

[0105] Cetyl alcohol polyoxyethylene ether 45.0-50.0 parts by weight

[0106] Nonylphenol polyoxyethylene ether, 4.5-5.0 parts by weight

[0107] 8.0-11.0 parts by weight of polyethylene glycol

[0108] 1.0-1.5 parts by weight of mercaptobenzothiazole

[0109] EDTA-disodium 0.9-1.2 parts by weight

[0110] Sodium citrate 1.0-2.0 parts by weight,

[0111] Carnauba wax 5.0-8.0 parts by weight, and

[0112] The remaining water.

[0113] In some embodiments, the components and quantities of the cleaning agent of the present invention are as follows:

[0114] Sodium lauryl sulfate 45.0-50.0 parts by weight

[0115] Cetyl alcohol polyoxyethylene ether 4.5-25.0 parts by weight

[0116] Nonylphenol polyoxyethylene ether, 4.5-5.0 parts by weight

[0117] 8.0-11.0 parts by weight of polyethylene glycol

[0118] 1.0-1.5 parts by weight of mercaptobenzothiazole

[0119] EDTA-disodium 0.9-1.2 parts by weight

[0120] Sodium citrate 1.0-2.0 parts by weight,

[0121] Carnauba wax 5.0-8.0 parts by weight, and

[0122] The remaining water.

[0123] In some embodiments, the components and quantities of the cleaning agent of the present invention are as follows:

[0124] Sodium lauryl sulfate 4.5-5.0 parts by weight

[0125] Cetyl alcohol polyoxyethylene ether 4.5-5.0 parts by weight

[0126] Nonylphenol polyoxyethylene ether, 45.0-50.0 parts by weight.

[0127] 8.0-11.0 parts by weight of polyethylene glycol

[0128] 1.0-1.5 parts by weight of mercaptobenzothiazole

[0129] EDTA-disodium 0.9-1.2 parts by weight

[0130] Sodium citrate 1.0-2.0 parts by weight,

[0131] Carnauba wax 5.0-8.0 parts by weight, and

[0132] The remaining water.

[0133] The present invention also provides a method for preparing a cleaning agent as described in any embodiment herein, the method comprising the following steps: adding sodium lauryl sulfate and cetyl polyoxyethylene ether to water and stirring until completely dissolved; adding a chelating agent and stirring until completely dissolved; cooling and then adding polyethylene glycol, nonylphenol polyoxyethylene ether, and other components and stirring until completely dissolved; finally adding a wax polishing agent and emulsifying to obtain the cleaning agent described in the present invention.

[0134] In some implementations, the method includes the following steps: first, adding sodium lauryl sulfate and cetyl polyoxyethylene ether to water and stirring until completely dissolved, then adding nonylphenol polyoxyethylene ether and other components.

[0135] In some embodiments, the temperature of the water can be 30-80°C, preferably 40-60°C.

[0136] In some embodiments, the temperature is maintained at 40-60°C after the addition of the chelating agent.

[0137] In some implementations, the cooling temperature can be 20-40°C, preferably 25-35°C or 30-35°C.

[0138] The cleaning agent of this invention, in practical use, requires minimal water for thorough cleaning, and exhibits high cleaning efficiency, low surface tension, short penetration time, and a high cloud point. The lower surface tension facilitates the penetration and fusion of the cleaning agent with oil and grease, reducing penetration time and significantly enhancing detergency and cleaning power. Nonionic surfactants undergo property changes above their cloud point, affecting their cleaning performance. Considering the high-temperature environment involved in cleaning external oil stains on special vehicle engines, the nonionic surfactant needs to possess a high cloud point to meet the oil stain cleaning performance requirements under high-temperature conditions.

[0139] Therefore, this invention also provides the application of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether in engine cleaners, the application of which includes: reducing penetration time, reducing the amount of water used for thorough cleaning, and increasing the cloud point of the cleaner. In this document, the amount of water used for thorough cleaning of the cleaner is measured as the amount of water required to thoroughly clean 50g of oil stains with 30mL of cleaner. The oil stain formulation is as follows (by weight): 3 parts waste engine oil, 1 part petroleum jelly, 1 part barium petroleum sulfonate, 2 parts hydraulic oil, 0.5 parts glyceryl monostearate, and 0.1 parts carbon black.

[0140] In some embodiments, the cleaning agent contains sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether in a mass ratio of 1:(1-10):1, such as 1:(1-6):1, 1:(2-4):1, or 1:(3-5):1. In some embodiments, the cleaning agent contains sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether in a mass ratio of (1-2):3:(1-2), such as 1:3:2 or 2:3:1. In some embodiments, the cleaning agent contains sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether in a mass ratio of 10:5:1, 10:1:1, 1:1:10, or 1:10:1. In some embodiments, the cleaning agent also contains polyethylene glycol.

[0141] In some embodiments, the cleaning agent of the present invention uses ≤3.0L of water for thorough cleaning, such as ≤1.5L or ≤1.0L, more preferably ≤0.5L.

[0142] In some embodiments, the cleaning agent of the present invention has a stain removal rate of ≥85%, such as ≥87% or ≥90%, more preferably ≥95%. In some embodiments, the surface tension of the cleaning agent of the present invention is ≤40mN / m, such as ≤35mN / m or 30mN / m, more preferably ≤25mN / m. In some embodiments, the penetration time of the cleaning agent of the present invention is ≤20min, such as ≤15min or 10min, more preferably ≤5min. In some embodiments, the cloud point of the cleaning agent of the present invention is ≥70℃, such as ≥75℃ or ≥80℃, more preferably ≥95℃.

[0143] In some embodiments, the engine cleaner of the present invention is used for cleaning engines of special vehicles, particularly engines of apron vehicles.

[0144] The present invention has the following beneficial effects:

[0145] Compared to traditional engine exterior cleaners, the cleaning agent of this invention has the ability to penetrate and disperse heavy oil stains efficiently. The process does not require rinsing with a lot of water. Simply spray it onto the surface of the dirt and let it penetrate for 30 seconds to 1 minute. Then, wipe it directly with a brush or towel to quickly remove the oil stains. The cleaning time is short, it does not produce stains, and it does not pollute the tarmac. It is a highly efficient and environmentally friendly cleaning agent.

[0146] The present invention will be further described below by way of specific embodiments. It should be understood that these embodiments are merely illustrative and not intended to limit the scope of the invention. Unless otherwise stated, the methods and reagents used in the embodiments are conventional methods and reagents in the art. In the embodiments, carnauba wax (30%) means that the active ingredient in carnauba wax is 30%.

[0147] Cleanliness and dirtiness ratio calculation method

[0148] Stainless steel was made into test pieces. 50g of artificially prepared contaminant was coated on the surface of the test pieces and weighed. The test pieces were then placed in a washing machine for washing at a specified washing frequency. After washing, the test pieces were processed and weighed again. The detergency was calculated according to formula (1).

[0149] Z=(m1-m2) / (m1-m0)×100% (1)

[0150] In the formula: Z — cleaning and soiling rate, %

[0151] m0 — Test piece mass, g

[0152] m1 ——— Mass of the test piece after contamination treatment, in grams

[0153] m2 — Mass of the test piece after rinsing and washing, in grams

[0154] Preparation of artificial wastewater for testing

[0155] The artificial oil stains on the exterior of the engine are simulated using homemade artificial oil, prepared by weight ratio as follows: 3 parts waste engine oil, 1 part petroleum jelly, 1 part barium petroleum sulfonate, 2 parts hydraulic oil, 0.5 parts glyceryl monostearate, and 0.1 parts carbon black. These components are mixed, dissolved at approximately 120°C, stirred thoroughly, and then left to stand at room temperature for later use.

[0156] Surface tension measurement and calculation of cleaning agents

[0157] The measurement is primarily performed using a surface tension meter, based on the ring method: a metal ring (made of platinum wire) immersed in the cleaning agent solution is detached from the liquid surface. The maximum pulling force F required to detach it is equal to the weight G of the ring itself plus the product of the surface tension F0 and the circumference L of the detached liquid surface. The ambient temperature is maintained at approximately 25°C during the measurement.

[0158] Permeation time measurement

[0159] The canvas settling method was used. A circular canvas with a diameter of 30 mm was used as the test material. Each canvas was placed on the surface of the liquid to be tested, and the time from when the canvas was placed on the surface of the liquid to when it completely settled to the bottom of the liquid was recorded. The shorter the time, the stronger the permeability.

[0160] Methods for calculating cloud point

[0161] Take 100 mL of the liquid prepared in the example, and gradually heat it until the liquid begins to become turbid. The temperature of the liquid at this point is the turbidity point.

[0162] Thorough cleaning water consumption calculation

[0163] A 10cm x 10cm x 0.05cm piece of iron is covered with artificial oil stains. The cleaning solution prepared in each example and comparative example is sprayed onto the stained area of ​​the iron. Let it sit for 1 minute, then scrub the stained area with a brush, and finally wipe it with a clean towel using the same force. If dirt remains after wiping, rinse with clean water until no dirt is left. This completes the thorough cleaning of the machine.

[0164] Example 1

[0165] Prepare the engine exterior cleaner as follows:

[0166] (1) Using a weighing device, accurately weigh 4.6 parts of sodium lauryl sulfate, 12.4 parts of cetyl polyoxyethylene ether, 9.7 parts of polyethylene glycol, 1.3 parts of mercaptobenzothiazole, 1.1 parts of disodium ethylenediaminetetraacetate (EDTA-disodium), 6 parts of carnauba wax (30%), 4.8 parts of nonylphenol polyoxyethylene ether, 1.5 parts of sodium citrate, and the balance of deionized water;

[0167] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0168] (3) Add sodium lauryl sulfate and cetyl polyoxyethylene ether and stir. Keep the speed of the stirrer at 500-600 r / min and stir continuously until completely dissolved.

[0169] (4) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0170] (5) After stirring, cool down to 30°C, then add polyethylene glycol, nonylphenol polyoxyethylene ether, mercaptobenzothiazole, and sodium citrate in sequence, and stir until completely dissolved;

[0171] (6) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0172] Example 2

[0173] Prepare the engine exterior cleaner as follows:

[0174] (1) Using a weighing device, accurately weigh 5 parts sodium lauryl sulfate, 11.8 parts cetyl polyoxyethylene ether, 9.8 parts polyethylene glycol, 1.1 parts mercaptobenzothiazole, 0.9 parts disodium ethylenediaminetetraacetate (EDTA-disodium), 5.8 parts carnauba wax (30%), 4.4 parts nonylphenol polyoxyethylene ether, 1.2 parts sodium citrate, and the balance of deionized water;

[0175] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0176] (3) Add sodium lauryl sulfate and cetyl polyoxyethylene ether and stir. Keep the speed of the stirrer at 500-600 r / min and stir continuously until completely dissolved.

[0177] (4) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0178] (5) After stirring, cool down to 30°C, then add polyethylene glycol, nonylphenol polyoxyethylene ether, mercaptobenzothiazole, and sodium citrate in sequence, and stir until completely dissolved;

[0179] (6) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0180] Example 3

[0181] Prepare the engine exterior cleaner as follows:

[0182] (1) Use a weighing device to accurately weigh 4.6 parts of sodium lauryl sulfate, 12.4 parts of cetyl polyoxyethylene ether, 1.3 parts of mercaptobenzothiazole, 1.1 parts of disodium ethylenediaminetetraacetate (EDTA-disodium), 6 parts of carnauba wax (30%), 4.8 parts of nonylphenol polyoxyethylene ether, 1.5 parts of sodium citrate, and deionized water;

[0183] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0184] (3) Add sodium lauryl sulfate and cetyl polyoxyethylene ether and stir. Keep the speed of the stirrer at 500-600 r / min and stir continuously until completely dissolved.

[0185] (4) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0186] (5) After stirring, cool down to 30°C, then add nonylphenol polyoxyethylene ether, mercaptobenzothiazole, and sodium citrate in sequence, and stir until completely dissolved;

[0187] (6) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0188] Comparative Example 1

[0189] The cleaning agent was only water. As a blank comparative example, the cleaning process used water to rinse the oil stains. The water consumption for thorough cleaning was 11L, and the cleaning rate was only 23%.

[0190] Comparative Example 2

[0191] Prepare the engine exterior cleaner as follows:

[0192] (1) Use a weighing device to accurately weigh 4.6 parts of sodium lauryl sulfate, 9.7 parts of polyethylene glycol, 1.3 parts of mercaptobenzothiazole, 1.1 parts of disodium ethylenediaminetetraacetate (EDTA-disodium), 6 parts of carnauba wax (30%), 4.8 parts of nonylphenol polyoxyethylene ether, 1.5 parts of sodium citrate, and the balance of deionized water;

[0193] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0194] (3) Add sodium lauryl sulfate and cetyl polyoxyethylene ether and stir. Keep the speed of the stirrer at 500-600 r / min and stir continuously until completely dissolved.

[0195] (4) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0196] (5) After stirring, cool down to 30°C, then add polyethylene glycol, nonylphenol polyoxyethylene ether, mercaptobenzothiazole, and sodium citrate in sequence, and stir until completely dissolved;

[0197] (6) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0198] Comparative Example 3

[0199] Prepare the engine exterior cleaner as follows:

[0200] (1) Using a weighing device, accurately weigh 12.4 parts of cetyl alcohol polyoxyethylene ether, 9.7 parts of polyethylene glycol, 1.3 parts of mercaptobenzothiazole, 1.1 parts of disodium ethylenediaminetetraacetate (EDTA-disodium), 6 parts of carnauba wax (30%), 12.4 parts of nonylphenol polyoxyethylene ether, 1.5 parts of sodium citrate, and the balance of deionized water;

[0201] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0202] (3) After adding cetyl alcohol polyoxyethylene ether, stir continuously at a speed of 500-600 r / min until completely dissolved.

[0203] (4) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0204] (5) After stirring, cool down to 30°C, then add polyethylene glycol, nonylphenol polyoxyethylene ether, mercaptobenzothiazole, and sodium citrate in sequence, and stir until completely dissolved;

[0205] (6) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0206] Comparative Example 4

[0207] Prepare the engine exterior cleaner as follows:

[0208] (1) Use a weighing device to accurately weigh 4.6 parts of sodium lauryl sulfate, 4.6 parts of cetyl polyoxyethylene ether, 9.7 parts of polyethylene glycol, 1.1 parts of mercaptobenzothiazole, 1.1 parts of disodium ethylenediaminetetraacetate (EDTA-disodium), 6 parts of carnauba wax (30%), 1.5 parts of sodium citrate, and the balance of deionized water;

[0209] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0210] (3) Add sodium lauryl sulfate and cetyl polyoxyethylene ether and stir. Keep the speed of the stirrer at 500-600 r / min and stir continuously until completely dissolved.

[0211] (4) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0212] (5) After stirring, cool to 30°C, then add polyethylene glycol, mercaptobenzothiazole, and sodium citrate in sequence, and stir until completely dissolved;

[0213] (6) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0214] Comparative Example 5

[0215] Prepare the engine exterior cleaner as follows:

[0216] (1) Use a weighing device to accurately weigh 9.7 parts of polyethylene glycol, 1.3 parts of mercaptobenzothiazole, 1.1 parts of disodium ethylenediaminetetraacetate (EDTA-disodium), 6 parts of carnauba wax (30%), 4.8 parts of nonylphenol polyoxyethylene ether, 1.5 parts of sodium citrate, and the balance of deionized water;

[0217] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0218] (3) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0219] (4) After stirring, cool down to 30°C, and add polyethylene glycol, nonylphenol polyoxyethylene ether, mercaptobenzothiazole and sodium citrate in sequence, stirring until completely dissolved;

[0220] (5) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0221] Comparative Example 6

[0222] Prepare the engine exterior cleaner as follows:

[0223] (1) Use a weighing device to accurately weigh 4.6 parts of sodium lauryl sulfate, 9.7 parts of polyethylene glycol, 1.3 parts of mercaptobenzothiazole, 1.1 parts of disodium ethylenediaminetetraacetate (EDTA-disodium), 6 parts of carnauba wax (30%), 1.5 parts of sodium citrate, and the balance of deionized water;

[0224] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0225] (3) After adding sodium lauryl sulfate, stir continuously at a speed of 500-600 r / min until completely dissolved.

[0226] (4) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0227] (5) After stirring, cool down to 30°C, then add polyethylene glycol, nonylphenol polyoxyethylene ether, mercaptobenzothiazole, and sodium citrate in sequence, and stir until completely dissolved;

[0228] (6) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0229] Comparative Example 7

[0230] Prepare the engine exterior cleaner as follows:

[0231] (1) Use a weighing device to accurately weigh 12.4 parts of cetyl alcohol polyoxyethylene ether, 9.7 parts of polyethylene glycol, 1.3 parts of mercaptobenzothiazole, 1.1 parts of disodium ethylenediaminetetraacetate (EDTA-disodium), 6 parts of carnauba wax (30%), 1.5 parts of sodium citrate, and the balance of deionized water;

[0232] (2) After adding deionized water to the reactor, heat it and control the water temperature at 50℃;

[0233] (3) After adding cetyl alcohol polyoxyethylene ether, stir continuously at a speed of 500-600 r / min until completely dissolved.

[0234] (4) Add EDTA-disodium while maintaining 50℃ and stirring continuously. Keep the speed of the mixer constant and continue stirring for 15 minutes.

[0235] (5) After stirring, cool to 30°C, then add polyethylene glycol, mercaptobenzothiazole, and sodium citrate in sequence, and stir until completely dissolved;

[0236] (6) Add carnauba wax (30%), and use an emulsifier to emulsify. After emulsification for 30 minutes, the cleaning agent solution is obtained.

[0237] The cleaning performance of the engine exterior cleaners prepared in the examples and comparative examples was tested. The amount of cleaner used in each example and comparative example was 30 mL. Compared with cleaning oil stains without using cleaner (Comparative Example 1), the experimental data are shown in the table below:

[0238] Table 1 Oil Removal Efficiency

[0239]

[0240]

[0241] As shown in Table 1, the oil removal rate of the engine exterior cleaner of the present invention is significantly improved (Examples 1-2), and the addition of polyethylene glycol further improves the cleaning rate (Comparative Example 3). After removing sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether (Comparative Examples 2-7), the oil removal ability of the cleaner is significantly reduced, indicating that the above components play an important role in the oil cleaning process.

[0242] The cleaning efficiency of commercially available engine cleaners (Comparative Examples 8-10) and CN200910112365.2 (Comparative Examples 11-15) was compared with that of the cleaner of the present invention. The amount of cleaner used in each comparative example was 30 mL. The results are shown in Table 2-3 below.

[0243] Table 2 Comparative proportions and performance parameters

[0244]

[0245] Table 3 Comparative Examples and Performance Parameters

[0246]

[0247]

[0248] As shown in Tables 2-3, sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether of the present invention are the best combination for cleaning efficiency. Although commercially available engine cleaners (comparative examples 8-10) have a higher cleaning efficiency and shorter penetration time, they require a larger amount of water for thorough cleaning under the same cleaning time.

[0249] Further research was conducted on the detergency and surface tension of three surfactants—sodium lauryl sulfate (SLS), cetyl polyoxyethylene ether (A-25), and nonylphenol polyoxyethylene ether (NP)—at different formulation ratios. The operating procedures were the same as in Example 1. The performance data of each formulation are shown in Table 4 below (test temperature 20°C). Except for Example 6, where the amount of detergent used was 18 mL, and Example 10, where the amount of detergent used was 25 mL, the amount used in the other examples was 30 mL.

[0250] Table 4 Surfactant ratio and performance parameters

[0251]

[0252]

[0253] As shown in Table 4, the optimal ratio of SLS, A-25 and NP is 1:3:1. At this ratio, the cleaning rate is the highest, the surface tension is the lowest, the surface activity is the highest, the cloud point is relatively high, and the water consumption for thorough cleaning is the lowest. The synergistic effect of the three is the strongest.

Claims

1. An engine cleaner, characterized in that, The cleaning agent contains polyethylene glycol, a surfactant, and water; wherein the surfactant is a mixture of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether; wherein, based on 100 parts by weight of the cleaning agent, the total mass of the surfactant is 10.0-35.0 parts by weight; wherein, the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is 1:(1~3):

1.

2. An engine cleaner, characterized in that, The cleaning agent contains polyethylene glycol, a surfactant, and water; wherein the surfactant is a mixture of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether; wherein, based on 100 parts by weight of the cleaning agent, the total mass of the surfactant is 25.0-30.0 parts by weight; wherein, the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is (1~2):3:(1~2).

3. The cleaning agent as described in claim 1 or 2, characterized in that, The cleaning agent has one or more of the following characteristics: The cleaning agent also contains one or more of the following: corrosion inhibitors, wax polishing agents, and chelating agents; The corrosion inhibitor is benzotriazole and / or mercaptobenzothiazole; The wax-based polishing agent is a plant wax, microcrystalline wax, or beeswax; and The chelating agent is sodium citrate and / or EDTA-disodium.

4. The cleaning agent as described in claim 3, wherein the wax polish is carnauba wax.

5. The cleaning agent as described in claim 3, characterized in that, The cleaning agent has one or more of the following characteristics: Based on a total weight of 100 parts by weight of cleaning agent, the corrosion inhibitor is 0.5-2.0 parts by weight; Based on a total cleaning agent weight of 100 parts by weight, the wax-based polishing agent comprises 5.0-10.0 parts by weight; and Based on a total weight of 100 parts by weight of cleaning agent, the chelating agent comprises 0.3-5.0 parts by weight.

6. The cleaning agent as described in claim 5, characterized in that, Based on a total weight of 100 parts by weight of cleaning agent, the corrosion inhibitor is 1.0-1.5 parts by weight.

7. The cleaning agent as described in claim 5, characterized in that, Based on a total weight of 100 parts by weight of cleaning agent, the chelating agent comprises 0.3-3.0 parts by weight.

8. A method for preparing a cleaning agent as described in any one of claims 1-7, characterized in that, The method includes the following steps: first, add sodium lauryl sulfate and cetyl polyoxyethylene ether to water and stir until completely dissolved, then add nonylphenol polyoxyethylene ether and the remaining other ingredients.

9. The method as described in claim 8, characterized in that, The water temperature is 30-80℃. Before adding the nonylphenol polyoxyethylene ether and the remaining components, the mixed solution is cooled down to 20-40℃.

10. The method as described in claim 9, characterized in that: The temperature of the water is 40-60℃, and / or The cooling refers to lowering the temperature to 25-35℃.

11. The method as described in claim 9, characterized in that, The cooling refers to lowering the temperature to 30-35℃.

12. The application of a mixture of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether in the preparation of an engine cleaner, characterized in that, The cleaning agent contains polyethylene glycol, a surfactant, and water. The surfactant is a mixture of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether. The total mass of the surfactant is 10.0-35.0 parts by mass per 100 parts by weight of the cleaning agent. The mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether in the cleaning agent is 1:(1~3):

1.

13. The application of a mixture of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether in the preparation of engine cleaners, characterized in that, The cleaning agent contains polyethylene glycol, a surfactant, and water. The surfactant is a mixture of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether. The total mass of the surfactant is 25.0-30.0 parts by mass per 100 parts by mass of the cleaning agent. The engine cleaner also contains polyethylene glycol, and the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is (1~2):3:(1~2).

14. The application of a cleaning agent containing polyethylene glycol, a surfactant, and water in reducing penetration time and reducing the amount of water used for thorough cleaning, characterized in that, The surfactant is a mixture of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether; wherein, based on 100 parts by weight of the total detergent, the total mass of the surfactant is 10.0-35.0 parts by weight; and the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is 1:(1~3):

1.

15. The application of a cleaning agent containing polyethylene glycol, a surfactant, and water in reducing penetration time and reducing the amount of water used for thorough cleaning, characterized in that, The surfactant is a mixture of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether; wherein, based on 100 parts by weight of the total detergent, the total mass of the surfactant is 25.0-30.0 parts by weight; the mass ratio of sodium lauryl sulfate, cetyl polyoxyethylene ether, and nonylphenol polyoxyethylene ether is (1~2):3:(1~2).

16. The application as described in claim 14 or 15, characterized in that, The penetration time of the cleaning agent is ≤20 min; and / or The cleaning agent requires ≤3.0 L of water for thorough cleaning; and / or The cleaning agent has a cloud point ≥70℃.

17. The application as described in claim 16, characterized in that, The application has one or more of the following characteristics: The penetration time of the cleaning agent is ≤5 min; The cleaning agent requires ≤0.5 L of water for thorough cleaning; The cleaning agent has a cloud point ≥95℃.

Images