A cleaning agent for cleaning the exterior of a special vehicle engine in a yard and a method for preparing the same

Abstract

The present application provides an engine cleaner, the cleaner contains surfactant and water, wherein the surfactant is alkyl glycoside, secondary alcohol polyoxyethylene ether and glycolipid anionic surfactant; the alkyl glycoside is C8-C16 alkyl glycoside, the secondary alcohol polyoxyethylene ether is selected from at least one of C8-C15 secondary alcohol polyoxyethylene ether, the number of ethylene oxide addition in the secondary alcohol polyoxyethylene ether is 3-30 or 4-20, the glycolipid anionic surfactant is selected from one or more of trehalose lipid, rhamnose lipid, sophorose lipid and mannose erythritol lipid; wherein, the content of the alkyl glycoside in the cleaner is 2-8wt%, such as 2.5-7wt% or 3-6.5wt%, the content of the glycolipid anionic surfactant is 10-20wt%, such as 12-18wt% or 13-17.5wt% or 14-16.5wt%, the content of the secondary alcohol polyoxyethylene ether is 7-12wt%, such as 8-10wt% or 9-9.5wt%, and the content of the surfactant is 20-35wt%, such as 23-30wt% or 25-29wt%. The cleaning agent product of the present application only needs to be sprayed on the oil stain surface, the penetration time is short, and the oil stain can be removed by simple and direct wiping, without generating a large amount of waste liquid and without polluting the ground.

Description

Technical Field

[0001] This invention relates to the field of industrial equipment cleaning agents, specifically to an engine external cleaning agent and its preparation method. 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 they enter and leave the apron. Due to the special structure of the platform vehicle, the rear wheels of the 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] Based on existing technology, 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 amount of waste liquid or polluting the ground.

[0007] To achieve the above objectives, the first aspect of the present invention provides an engine cleaner containing a surfactant and water, wherein the surfactant is an alkyl glycoside, a glycolipid anionic surfactant, and a secondary alcohol polyoxyethylene ether.

[0008] The alkyl glycoside is a C8-C16 alkyl glycoside.

[0009] The glycolipid anionic surfactant is selected from one or more of trehalose lipids, rhamnose lipids, sophorose lipids, and mannoerythritol lipids.

[0010] The secondary alcohol polyoxyethylene ether is selected from at least one of C8-C15 secondary alcohols, and the number of ethylene oxide additions in the secondary alcohol polyoxyethylene ether is 3-30 or 4-20.

[0011] In the cleaning agent, based on the total weight of the cleaning agent, the content of the alkyl glycoside is 2-8 wt%, such as 2.5-7 wt% or 3-6.5 wt%; the content of the glycolipid anionic surfactant is 10-20 wt%, such as 12-18 wt% or 13-17.5 wt% or 14-16.5 wt%; the content of the secondary alcohol polyoxyethylene ether is 7-12 wt%, such as 8-10 wt% or 9-9.5 wt%; and the content of the surfactant is 20-35 wt%, such as 23-30 wt% or 25-29 wt%.

[0012] In one or more embodiments, the mass ratio of alkyl glycoside, glycolipid anionic surfactant and secondary alcohol polyoxyethylene ether in the cleaning agent is (2~8):(10~20):(7~12) or (3~7):(13~18):(8~10).

[0013] In one or more embodiments, the cleaning agent has one or more of the following characteristics:

[0014] The cleaning agent also contains one or more of the following: alcohol ether organic cosolvents, corrosion inhibitors, chelating agents, brighteners, cleaning aids, and fragrances;

[0015] The alcohol ether organic co-solvent is selected from one or more of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, 1,2-propanediol methyl ether and dipropylene glycol dimethyl ether;

[0016] The alcohol ether organic cosolvent is dipropylene glycol dimethyl ether;

[0017] The corrosion inhibitor is benzotriazole and / or mercaptobenzothiazole;

[0018] The chelating agent is sodium citrate and / or EDTA-disodium;

[0019] The brightener is a silicone oil emulsion;

[0020] The cleaning aid is sodium hydroxide; and

[0021] The fragrance is selected from one or more of sweet orange essence, lemon essence, and apple essence.

[0022] In one or more embodiments, the mass of the alcohol ether organic co-solvent is 5-15 wt% or 10-12 wt% based on the total weight of the cleaning agent.

[0023] In one or more embodiments, the corrosion inhibitor is 0.3 to 2.0 wt%, 0.5 to 1.5 wt%, or 0.7 to 0.9 wt% by weight of the total cleaning agent.

[0024] In one or more embodiments, the chelating agent is 0.2 to 0.8 wt% or 0.3 to 0.5 wt% by weight of the total detergent.

[0025] In one or more embodiments, the brightener is 1.5 to 5.0 wt% or 2.0 to 3.0 wt% by weight of the total cleaning agent.

[0026] In one or more embodiments, the cleaning aid is 0.5-5.0 wt% or 1.0-2.0 wt% by weight of the total weight of the cleaning agent.

[0027] In one or more embodiments, the fragrance is 0.01-1.0 wt% or 0.05-0.5 wt% by weight of the total cleaning agent.

[0028] A second aspect of the present invention provides an engine cleaner, wherein the cleaner, by total weight, contains the following components:

[0029] Alkyl glycosides 2-8 wt%,

[0030] Glycolipid anionic surfactants 10-20 wt%.

[0031] Secondary alcohol polyether 7~12 wt%,

[0032] Alcohol ether organic cosolvents 5~15wt% or 10~12wt%,

[0033] Corrosion inhibitor 0.3~2.0 wt%.

[0034] Chelating agent 0.2~0.8 wt% or 0.3~0.5 wt%.

[0035] Brightening agent 1.5~5.0 wt% or 2.0~3.0 wt%.

[0036] Cleaning aids: 0.5-5.0 wt% or 1.0-3.0 wt%.

[0037] Fragrance 0.01-1.0 wt% or 0.05-0.5 wt%, and

[0038] Water balance;

[0039] in,

[0040] The alkyl glycoside is a C8-C16 alkyl glycoside.

[0041] The glycolipid anionic surfactant is selected from one or more of trehalose lipids, rhamnose lipids, sophorose lipids, and mannoerythritol lipids.

[0042] The secondary alcohol polyether is a C8~C15 secondary alcohol or a C12~C14 secondary alcohol, and the number of ethylene oxide additions in the secondary alcohol polyether is 3~30 or 4~20.

[0043] In one or more embodiments, the cleaning agent, by total weight, contains:

[0044] Dodecyl glycoside 2.5~7 wt%,

[0045] rhamnolipin 12-18 wt%,

[0046] 8-10 wt% of C12-C14 secondary alcohol polyoxyethylene ether

[0047] 10-12 wt% of dipropylene glycol dimethyl ether

[0048] Benzotriazole 0.7~0.9 wt%.

[0049] Sodium citrate 0.3~0.5 wt%.

[0050] Silicone oil emulsion 2.5~3.0 wt%.

[0051] Sodium hydroxide 1.0~2.0 wt%.

[0052] Fragrance 0.15~0.25 wt%, and

[0053] Water balance.

[0054] The present invention also provides a method for preparing a cleaning agent as described in any embodiment herein, the method comprising: first mixing water, alkyl glycoside, secondary alcohol polyoxyethylene ether and glycolipid anionic surfactant evenly, and then adding the remaining other components.

[0055] 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 alkyl glycosides, glycolipid anionic surfactants and secondary alcohol polyethers;

[0056] in,

[0057] The alkyl glycoside is a C8-C16 alkyl glycoside.

[0058] The glycolipid anionic surfactant is selected from one or more of trehalose lipids, rhamnose lipids, sophorose lipids, and mannoerythritol lipids.

[0059] The secondary alcohol polyether is a C8~C15 secondary alcohol, and the number of ethylene oxide additions in the secondary alcohol polyether is 3~30 or 4~20.

[0060] In one or more embodiments, the mass ratio of the alkyl glycoside, glycolipid anionic surfactant and secondary alcohol polyether is (2~8):(10~20):(7~12) or (3~7):(13~18):(8~10).

[0061] The present invention also provides the application of alkyl glycosides, glycolipid anionic surfactants and secondary alcohol polyethers in cleaning engines and / or preparing engine cleaners, wherein the alkyl glycosides are C8-C16 alkyl glycosides, the glycolipid anionic surfactants are selected from one or more of trehalose lipids, rhamnose lipids, sophorose lipids and mannoerythritol lipids, and the secondary alcohol polyoxyethylene ethers are selected from at least one of C8-C15 secondary alcohols, wherein the ethylene oxide addition number in the secondary alcohol polyoxyethylene ethers is 3-30 or 4-20;

[0062] In the cleaning agent, the mass ratio of the alkyl glycoside, the glycolipid anionic surfactant and the secondary alcohol polyoxyethylene ether is (2~8):(10~20):(7~12) or (3~7):(13~18):(8~10). Detailed Implementation

[0063] 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.

[0064] 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.

[0065] 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.

[0066] In this document, all features defined in the form of 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.

[0067] Unless otherwise specified, percentage refers to mass percentage, proportion refers to mass ratio, and part refers to mass part.

[0068] 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.

[0069] In this article, "secondary alcohol polyoxyethylene ether" and "secondary alcohol polyether" can be used interchangeably.

[0070] In this article, the sum of the percentages of all components in the composition is 100%.

[0071] 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.

[0072] The inventors discovered that by combining the nonionic surfactant dodecyl glycoside (C12APG), secondary alcohol polyether, and the anionic surfactant rhamnolipid, a stable solution system can be effectively formed, reducing the penetration time of the cleaning agent, lowering surface tension, increasing the cloud point, and reducing the amount of water required for thorough cleaning. The cleaning agent of this invention only needs to be sprayed onto the oily surface; it has a short penetration time, and can be easily removed by wiping. It does not produce a large amount of waste liquid or pollute the ground, making it a highly efficient and environmentally friendly cleaning agent for the exterior surfaces of motor vehicle engines.

[0073] Engine cleaner

[0074] This invention first provides an engine cleaner containing: a surfactant, water, and optionally one or more of an alcohol ether organic co-solvent, a corrosion inhibitor, a chelating agent, a brightener, a cleaning aid, and a fragrance. The surfactant is an alkyl glycoside, a secondary alcohol polyether sugar, or a lipid anionic surfactant.

[0075] The surfactants suitable for use in this invention should be surfactants with excellent cleaning performance and strong detergency, preferably anionic and nonionic surfactants. Anionic surfactants can be glycolipid anionic surfactants, such as trehalose, rhamnose, sophorose, and mannoerythritol esters, preferably rhamnose, more preferably rhamnose produced by *Pseudomonas aeruginosa* fermentation, which possesses good detergency, penetration, and foaming power, resulting in superior overall cleaning performance. Nonionic surfactants can be alkyl glycosides (APG) and secondary alcohol polyoxyethylene ethers, preferably alkyl glycosides with alkyl groups of C8-C16, such as dodecyl glycoside (C12APG), which have strong cleaning properties, low foaming properties, high stability, are easily soluble in water and organic solvents, and are highly adaptable to various environments, even low-temperature environments. Secondary alcohol polyoxyethylene ethers are typically products obtained by the addition reaction of ethylene oxide with a secondary alcohol as an initiator in the presence of a catalyst. In the cleaning agent of the present invention, the secondary alcohol of the secondary alcohol polyoxyethylene ether is selected from at least one of C8 to C15 secondary alcohols, preferably selected from at least one of C8 to C10 or C12 to C14 secondary alcohols, and the number of ethylene oxide additions in the secondary alcohol polyoxyethylene ether molecule is 3 to 30 or 4 to 20.

[0076] In some embodiments, the cleaning agent of the present invention contains, by weight of the total cleaning agent, 2-8 wt% dodecyl glycoside, such as 2.5-7 wt% or 3-6.5 wt%, 10-20 wt% rhamnolipid, such as 12-18 wt%, 13-17.5 wt% or 14-16.5 wt%, 7-12 wt% secondary alcohol polyether, such as 8-10 wt% or 9-9.5 wt%, and 20-35 wt% surfactant, such as 23-30 wt% or 25-29 wt%.

[0077] In some embodiments, the mass ratio of dodecyl glycoside, rhamnolipid, and secondary alcohol polyether in the cleaning agent of the present invention is (2~8):(10~20):(7~12) or (3~7):(13~18):(8~10), for example 5:15:9, 6:26:19, 13:35:20, 11:34:16, 33:165:95, 13:26:20, 13:26:16, 7:29:19.

[0078] The alcohol ether organic co-solvents suitable for use in this invention should increase the solubility of surfactants and can be selected from one or more of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, 1,2-propanediol methyl ether, and dipropylene glycol dimethyl ether, with dipropylene glycol dimethyl ether being the most preferred. Using dipropylene glycol dimethyl ether as an alcohol ether organic co-solvent can solubilize surfactants, improve product stability, dissolve greases, and has an appropriate evaporation rate, reducing the corrosiveness of the cleaning agent. In the cleaning agent of this invention, the mass of the alcohol ether organic co-solvent can be 5-15 wt% or 10-12 wt% based on the total weight of the cleaning agent.

[0079] The corrosion inhibitors suitable for use in this invention are known in the art, such as benzotriazole and / or mercaptobenzothiazole. In the cleaning agent of this invention, the mass of benzotriazole, based on the total weight of the cleaning agent, can be 0.3~2.0 wt%, preferably 0.5~1.5 wt%, for example 0.7~0.9 wt%. Using benzotriazole 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.

[0080] The chelating agent suitable for use in this invention should be a chelating agent with strong dispersing ability and strong anti-redeposition ability, such as sodium citrate and / or disodium EDTA. In the cleaning agent of this invention, the mass of the chelating agent can be 0.2~0.8 wt% or 0.3~0.5 wt% based on the total weight of the cleaning agent. Using sodium citrate as a chelating agent can significantly enhance the detergency of the cleaning agent, and sodium citrate is biodegradable and does not pollute the environment.

[0081] The brightener suitable for use in this invention can be any known in the art, such as a silicone oil emulsion. In the cleaning agent of this invention, the mass of the brightener can be 1.5~5.0 wt% or 2.0~3.0 wt%, for example 2.5~3.0 wt%, based on the total weight of the cleaning agent. Using the brightener can improve the metallic luster and protect the outer surface of the engine.

[0082] The cleaning aids suitable for use in this invention are known in the art and can be sodium hydroxide. The mass of the cleaning aid can be 0.5-5.0 wt% or 1.0-2.0 wt% based on the total weight of the cleaning agent, for example, 1.5 wt%, 2.0 wt%, or 2.5 wt%. Using sodium hydroxide as a cleaning aid can adjust the pH of the cleaning agent to alkaline, promote the performance of anionic surfactants, and improve detergency.

[0083] The fragrances suitable for use in this invention can be selected by those skilled in the art according to actual needs to change the smell of the cleaning agent and improve its recognizability. These can be sweet orange fragrance, lemon fragrance, apple fragrance, etc. In some embodiments, this invention uses green apple fragrance. In the cleaning agent of this invention, the mass of the fragrance can be 0.01-1.0 wt% or 0.05-0.5 wt%, for example, 0.15-0.25 wt%, based on the total weight of the cleaning agent.

[0084] 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.

[0085] The cleaning agent of the present invention uses water as the base solvent. Apart from surfactants, alcohol ether organic co-solvents, corrosion inhibitors, chelating agents, brighteners, cleaning aids and fragrances, the remainder can be water, preferably deionized water.

[0086] In some embodiments, the cleaning agent of the present invention, by total weight, contains:

[0087] Alkyl glycosides 2-8 wt%, glycolipid anionic surfactants 10-20 wt%.

[0088] Secondary alcohol polyether 7~12 wt%,

[0089] Alcohol ether organic cosolvents 5~15wt% or 10~12wt%,

[0090] Corrosion inhibitor 0.3~2.0 wt%.

[0091] Chelating agent 0.2~0.8 wt% or 0.3~0.5 wt%.

[0092] Brightening agent 1.5~5.0 wt% or 2.0~3.0 wt%.

[0093] Cleaning aids: 0.5-5.0 wt% or 1.0-3.0 wt%.

[0094] Fragrance 0.01-1.0 wt% or 0.05-0.5 wt%, and

[0095] Water balance;

[0096] in,

[0097] The alkyl glycoside is a C8-C16 alkyl glycoside.

[0098] The glycolipid anionic surfactant is selected from one or more of trehalose lipids, rhamnose lipids, sophorose lipids, and mannoerythritol lipids.

[0099] The secondary alcohol polyether is a C8~C15 secondary alcohol or a C12~C14 secondary alcohol, and the number of ethylene oxide additions in the secondary alcohol polyether is 3~30 or 4~20.

[0100] In some embodiments, the cleaning agent of the present invention, by total weight of the cleaning agent, contains:

[0101] Dodecyl glycoside 2.5~7 wt%,

[0102] rhamnolipin 12-18 wt%,

[0103] 8-10 wt% of C12-C14 secondary alcohol polyoxyethylene ether

[0104] 10-12 wt% of dipropylene glycol dimethyl ether

[0105] Benzotriazole 0.7~0.9 wt%.

[0106] Sodium citrate 0.3~0.5 wt%.

[0107] Silicone oil emulsion 2.5~3.0 wt%.

[0108] Sodium hydroxide 1.0~2.0 wt%.

[0109] Fragrance 0.15~0.25 wt%, and

[0110] Water balance.

[0111] Method for preparing a cleaning agent The present invention also provides a method for preparing the cleaning agent according to any embodiment of the present invention, the method comprising the following steps: first, mixing water, alkyl glycoside, glycolipid anionic surfactant, and secondary alcohol polyoxyethylene ether evenly, and then adding the remaining other components.

[0112] The raw materials can be mixed and completely dissolved using methods known in the art, such as stirring. The stirring speed should be adjusted according to the actual situation, for example, 500-700 r / min.

[0113] Method for reducing cleaning agent penetration time, water consumption for complete cleaning and improving cleaning efficiency

[0114] This invention also provides a method for reducing the penetration time of cleaning agents and reducing the amount of water used for thorough cleaning. The method includes: the cleaning agent containing alkyl glycosides, glycolipid anionic surfactants, and secondary alcohol polyethers; wherein the alkyl glycosides are C8-C16 alkyl glycosides, the glycolipid anionic surfactants are selected from one or more of trehalose, rhamnose, sophorose, and mannoerythritol esters, and the secondary alcohol polyethers are C8-C15 secondary alcohols, wherein the ethylene oxide addition number in the secondary alcohol polyethers is 3-30 or 4-20.

[0115] In some embodiments, the cleaning agent contains dodecyl glycoside, rhamnolipid, and C12-C14 secondary alcohol polyether.

[0116] In some embodiments, the cleaning agent of the present invention contains, by weight of the total cleaning agent, 2-8 wt% dodecyl glycoside, such as 2.5-7 wt% or 3-6.5 wt%, 10-20 wt% rhamnolipid, such as 12-18 wt%, 13-17.5 wt% or 14-16.5 wt%, 7-12 wt% secondary alcohol polyether, such as 8-10 wt% or 9-9.5 wt%, and 20-35 wt% surfactant, such as 23-30 wt% or 25-29 wt%.

[0117] In some embodiments, the mass ratio of dodecyl glycoside, secondary alcohol polyoxyethylene ether, and rhamnolipid in the cleaning agent of the present invention is (2~8):(10~20):(7~12) or (3~7):(13~18):(8~10), for example 5:15:9, 6:26:19, 13:35:20, 11:34:16, 33:165:95, 13:26:20, 13:26:16, 7:29:19.

[0118] Therefore, the present invention also provides the application of C8-C16 alkyl glycosides, C12-C14 secondary alcohol polyoxyethylene ethers and glycolipid anionic surfactants in cleaning engines and / or preparing engine cleaners, wherein the mass ratio of C8-C16 alkyl glycosides, glycolipid anionic surfactants and C12-C14 secondary alcohol polyoxyethylene ethers is (2-8):(10-20):(7-12) or (3-7):(13-18):(8-10).

[0119] In some embodiments, the cleaning agent of the present invention has a cleaning efficiency of ≥96% or ≥98%, a cloud point of ≥96°C or 98°C, a penetration time of ≤2 min or ≤1 min or ≤0.5 min, a thorough cleaning water consumption of ≤0.8 L or ≤0.5 L or ≤0.3 L, and a surface tension of ≤20 mN / m or ≤18 mN / m.

[0120] The present invention has the following beneficial effects:

[0121] Compared with traditional engine exterior cleaners, the cleaning agent proposed in 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 20 seconds to 1 minute. Then brush it with a brush or wipe it directly with a towel to quickly remove the oil stains. It does not produce stains or pollute the apron. It is a highly efficient and environmentally friendly exterior cleaner for special vehicles on the apron.

[0122] 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. The methods and reagents used in the embodiments are conventional methods and reagents in the art, unless otherwise stated. In the embodiments of the present invention, dodecyl glycoside (C12APG) was purchased from Yangzhou Chenhua New Material Co., Ltd., rhamnose glycolipid was purchased from Daqing Wotais Chemical Co., Ltd., secondary alcohol polyether (fatty secondary alcohol polyoxyethylene ether) was C12 secondary alcohol, and ethylene oxide addition number was 10, purchased from Jiangsu SECCO Chemical Co., Ltd.

[0123] Cleanliness and dirtiness ratio calculation method

[0124] The test solution was prepared using a homemade artificial oil stain to simulate the oil stains on the exterior of an engine. The mixture was 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. The above components were mixed, dissolved at approximately 120°C, stirred thoroughly, and then left to stand at room temperature for later use.

[0125] 50g of artificially prepared contaminant was coated onto the surface of a test piece made of stainless steel and weighed. The test piece was then placed in a washing machine for washing at a specified washing frequency. After washing, the test piece was processed and weighed again, and the detergency was calculated according to formula (1).

[0126] Z=(m1-m2) / (m1-m0)×100% (1)

[0127] In the formula: Z — cleaning and soiling rate, %

[0128] m0 — Test piece mass, g

[0129] m1 ——— Mass of the test piece after contamination treatment, in grams

[0130] m2 — Mass of the test piece after rinsing and washing, in grams

[0131] Cleaner surface tension

[0132] Surface tension measurement and calculation are mainly performed using a surface tension meter, based on the ring method. This involves detaching a metal ring (made of platinum wire) immersed in the cleaning agent solution from the liquid surface. The maximum pulling force F required 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℃ during the measurement.

[0133] Permeation time measurement

[0134] 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.

[0135] Methods for calculating cloud point

[0136] 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.

[0137] Thorough cleaning water consumption calculation

[0138] Take a 10cm piece 10cm A 0.05cm iron sheet is soaked in the above-mentioned contaminant. 30mL of the cleaning solution prepared in each example and comparative example is sprayed onto the contaminated area. The area is left to stand for 1 minute, then scrubbed with a brush and wiped with a clean towel. If dirt remains after wiping, rinse with clean water until no dirt is left. This completes the thorough cleaning of the machine.

[0139] Comparative Example 1

[0140] The method for preparing engine cleaning agent includes the following steps:

[0141] (1) Weigh accurately using weighing equipment: 15 parts by weight of rhamnolipin, 9 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0142] (2) Weigh the deionized water, rhamnolipin, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve the rhamnolipin, secondary alcohol polyether and silicone oil emulsion in the deionized water to obtain mixed solution S2.

[0143] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3.

[0144] Comparative Example 2

[0145] The method for preparing engine cleaning agent includes the following steps:

[0146] (1) Weigh accurately using weighing equipment: 5 parts by weight of dodecyl glycoside (C12APG), 9 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0147] (2) Weigh the deionized water, dodecyl glycoside, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve the dodecyl glycoside, secondary alcohol polyether and silicone oil emulsion in the deionized water to obtain mixed solution S2.

[0148] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0149] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0150] Comparative Example 3

[0151] The method for preparing engine cleaning agent includes the following steps:

[0152] (1) Weigh accurately using weighing equipment: 5 parts by weight of dodecyl glycoside (C12APG), 15 parts by weight of rhamnolipid, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and 62.85 parts by weight of deionized water;

[0153] (2) Weigh the deionized water, dodecyl glycoside (C12APG), rhamnolipid and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve the dodecyl glycoside (C12APG), rhamnolipid and silicone oil emulsion in the deionized water to obtain mixed solution S2.

[0154] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0155] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0156] Comparative Example 4

[0157] The method for preparing engine cleaning agent includes the following steps:

[0158] (1) Weigh accurately using weighing equipment: 5 parts by weight of dodecyl glycoside (C12APG), 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and 77.85 parts by weight of deionized water;

[0159] (2) Weigh the deionized water, dodecyl glycoside and silicone oil emulsion into the reaction vessel and mix at 500-700 r / min to completely dissolve the dodecyl glycoside and silicone oil emulsion in the deionized water to obtain a mixed solution S2.

[0160] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0161] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0162] Comparative Example 5

[0163] The method for preparing engine cleaning agent includes the following steps:

[0164] (1) Weigh accurately using weighing equipment: 15 parts by weight of rhamnolipin, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavoring, and 67.85 parts by weight of deionized water;

[0165] (2) Weigh the deionized water, rhamnolipin and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve the rhamnolipin and silicone oil emulsion in the deionized water to obtain mixed solution S2.

[0166] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0167] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0168] Comparative Example 6

[0169] The method for preparing engine cleaning agent includes the following steps:

[0170] (1) Weigh accurately using weighing equipment: 9 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and 73.85 parts by weight of deionized water;

[0171] (2) Weigh the secondary alcohol polyether and silicone oil emulsion in deionized water and put them into the reactor. Mix them at 500-700 r / min to completely dissolve the secondary alcohol polyether and silicone oil emulsion in the deionized water to obtain a mixed solution S2.

[0172] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0173] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0174] Comparative Example 7

[0175] The method for preparing engine cleaning agent includes the following steps:

[0176] (1) Weigh accurately using weighing equipment: 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavoring, and 82.85 parts by weight of deionized water;

[0177] (2) Add the weighed deionized water, dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the solution and disperse for 5-8 minutes to obtain mixed solution S1;

[0178] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0179] Comparative Example 8

[0180] Using water as a control example for engine cleaner, cleaning performance and other parameters were tested. The cleaner was water only, serving as a blank control example. During the cleaning process, water was used to rinse away oil stains; the water consumption for thorough cleaning was 11 L, and the cleaning rate was only 23%.

[0181] Example 1

[0182] The method for preparing engine cleaning agent includes the following steps:

[0183] (1) Weigh accurately using weighing equipment: 5 parts by weight of dodecyl glycoside (C12APG), 15 parts by weight of rhamnose lipolipide, 9 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0184] (2) Weigh the deionized water, dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve the dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion in the deionized water to obtain mixed solution S2.

[0185] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0186] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0187] Example 2

[0188] The method for preparing engine cleaning agent includes the following steps:

[0189] (1) Weigh accurately using weighing equipment: 3 parts by weight of dodecyl glycoside (C12APG), 13 parts by weight of rhamnose lipolipide, 9.5 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0190] (2) Weigh the deionized water, dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve the dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion in the deionized water to obtain mixed solution S2.

[0191] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0192] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0193] Example 3

[0194] The method for preparing engine cleaning agent includes the following steps:

[0195] (1) Weigh accurately using weighing equipment: 6.5 parts by weight of dodecyl glycoside (C12APG), 17.5 parts by weight of rhamnose lipolipide, 10 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0196] (2) Weigh the deionized water, dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve the dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion in the deionized water to obtain mixed solution S2.

[0197] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0198] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0199] Example 4

[0200] The method for preparing engine cleaning agent includes the following steps:

[0201] (1) Weigh accurately using weighing equipment: 5.5 parts by weight of dodecyl glycoside (C12APG), 17 parts by weight of rhamnose lipolipide, 8 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0202] (2) Weigh the dodecyl glycoside, rhamnolipin, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve the dodecyl glycoside, rhamnolipin, secondary alcohol polyether and silicone oil emulsion in deionized water to obtain mixed solution S2.

[0203] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0204] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0205] Example 5

[0206] The method for preparing engine cleaning agent includes the following steps:

[0207] (1) Weigh accurately using weighing equipment: 3.3 parts by weight of dodecyl glycoside (C12APG), 16.5 parts by weight of rhamnose lipolipide, 9.5 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0208] (2) Add dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve AEO-9, LAS and silicone oil emulsion in deionized water to obtain mixed solution S2.

[0209] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0210] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0211] Example 6

[0212] The method for preparing engine cleaning agent includes the following steps:

[0213] (1) Weigh accurately using weighing equipment: 6.5 parts by weight of dodecyl glycoside (C12APG), 13 parts by weight of rhamnose glycolipid, 10 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0214] (2) Add dodecyl glycoside, rhamnolipin, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve dodecyl glycoside, rhamnolipin, secondary alcohol polyether and silicone oil emulsion in deionized water to obtain mixed solution S2.

[0215] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0216] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0217] Example 7

[0218] The method for preparing engine cleaning agent includes the following steps:

[0219] (1) Weigh accurately using weighing equipment: 6.5 parts by weight of dodecyl glycoside (C12APG), 13 parts by weight of rhamnose glycolipid, 8 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0220] (2) Add dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve AEO-9, LAS and silicone oil emulsion in deionized water to obtain mixed solution S2.

[0221] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0222] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0223] Example 8

[0224] The method for preparing engine cleaning agent includes the following steps:

[0225] (1) Weigh accurately using weighing equipment: 3.5 parts by weight of dodecyl glycoside (C12APG), 14.5 parts by weight of rhamnose lipolipide, 9.5 parts by weight of secondary alcohol polyether, 11.5 parts by weight of dipropylene glycol dimethyl ether, 0.8 parts by weight of benzotriazole, 0.45 parts by weight of sodium citrate, 2.7 parts by weight of silicone oil emulsion, 1.5 parts by weight of sodium hydroxide, 0.2 parts by weight of green apple flavor, and the balance of deionized water;

[0226] (2) Add dodecyl glycoside, rhamnolipid, secondary alcohol polyether and silicone oil emulsion into the reactor and mix at 500-700 r / min to completely dissolve AEO-9, LAS and silicone oil emulsion in deionized water to obtain mixed solution S2.

[0227] (3) While stirring at the same speed, add dipropylene glycol dimethyl ether, sodium citrate, sodium hydroxide and fragrance to the mixed solution S2 and disperse for 5-8 minutes to obtain mixed solution S3;

[0228] (4) Add benzotriazole and disperse for 5 minutes to obtain the cleaning agent solution.

[0229] The cleaning performance of the cleaning agents prepared in the examples and comparative examples was tested. Except for Comparative Example 8, which did not use any cleaning agent, the amount of cleaning agent used in each example and comparative example was 30 mL. The cleaning performance data are shown in Table 1-2 below.

[0230] Table 1: Cleaning performance of detergents in the comparative examples

[0231]

[0232] Table 2: Cleaning performance of the cleaning agents in the examples

[0233]

[0234] As shown in Tables 1-2 above, the engine exterior cleaner of the present invention significantly improves oil stain removal, and Example 1 is the optimal embodiment. The optimal ratio of dodecyl glycoside, secondary alcohol polyether, and rhamnolipid is around 5:9:15, at which point the cleaning rate is highest, surface tension is lowest, surface activity is highest, and the synergistic effect of the two is strongest. After reducing or removing one or more of the components of dodecyl glycoside, secondary alcohol polyether, and rhamnolipid (Comparative Examples 1-7), the oil stain removal ability of the cleaner significantly decreases, indicating that the above components play an important role in the oil stain cleaning process.

[0235] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An engine cleaner, characterized in that, The cleaning agent contains a surfactant and water, wherein the surfactant is a mixture of alkyl glycosides, secondary alcohol polyoxyethylene ethers, and glycolipid anionic surfactants; The alkyl glycoside is a C8-C16 alkyl glycoside. The secondary alcohol polyoxyethylene ether is selected from at least one of C8-C15 secondary alcohol polyoxyethylene ethers, wherein the ethylene oxide addition number in the secondary alcohol polyoxyethylene ether is 3-30. The glycolipid anionic surfactant is selected from one or more of trehalose lipids, rhamnose lipids, sophorose lipids, and mannoerythritol lipids; In the cleaning agent, based on the total weight of the cleaning agent, the content of the alkyl glycoside is 2-8 wt%, the content of the glycolipid anionic surfactant is 10-20 wt%, the content of the secondary alcohol polyoxyethylene ether is 7-12 wt%, and the content of the surfactant is 20-35 wt%. The mass ratio of alkyl glycoside, glycolipid anionic surfactant and secondary alcohol polyoxyethylene ether is (3~7):(13~18):(8~10).

2. The cleaning agent as described in claim 1, characterized in that, The cleaning agent meets one or more of the following characteristics: The secondary alcohol polyoxyethylene ether is selected from at least one of C8-C15 secondary alcohol polyoxyethylene ethers, wherein the ethylene oxide addition number in the secondary alcohol polyoxyethylene ether is 4-20. In the cleaning agent, the content of the alkyl glycoside is 2.5~7 wt% based on the total weight of the cleaning agent. In the cleaning agent, the content of the glycolipid anionic surfactant is 12-18 wt% based on the total weight of the cleaning agent. In the cleaning agent, the content of the secondary alcohol polyoxyethylene ether is 8-10 wt% based on the total weight of the cleaning agent, and In the cleaning agent, the content of the surfactant is 23-30 wt% based on the total weight of the cleaning agent.

3. The cleaning agent as described in claim 2, characterized in that, The cleaning agent meets one or more of the following characteristics: In the cleaning agent, the content of the alkyl glycoside is 3-6.5 wt% based on the total weight of the cleaning agent. In the cleaning agent, the content of the glycolipid anionic surfactant is 13-17.5 wt% based on the total weight of the cleaning agent. In the cleaning agent, the content of the secondary alcohol polyoxyethylene ether is 9-9.5 wt% based on the total weight of the cleaning agent, and In the cleaning agent, the content of the surfactant is 25-29 wt% based on the total weight of the cleaning agent.

4. The cleaning agent as described in claim 1, characterized in that, The cleaning agent has one or more of the following characteristics: The alkyl glycoside is a C10~C14 alkyl glycoside; The glycolipid anionic surfactant is rhamnolipid; The secondary alcohol polyoxyethylene ether is a C12~C14 secondary alcohol polyoxyethylene ether, and the number of ethylene oxide additions in the secondary alcohol polyoxyethylene ether is 3~30; The cleaning agent also contains one or more of the following: alcohol ether organic cosolvents, corrosion inhibitors, chelating agents, brighteners, cleaning aids, and fragrances; The alcohol ether organic co-solvent is selected from one or more of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, 1,2-propanediol methyl ether and dipropylene glycol dimethyl ether; The corrosion inhibitor is benzotriazole and / or mercaptobenzothiazole; The chelating agent is sodium citrate and / or EDTA-disodium; The brightener is a silicone oil emulsion; The cleaning aid is sodium hydroxide; and The fragrance is selected from one or more of sweet orange essence, lemon essence, and apple essence.

5. The cleaning agent as described in claim 4, characterized in that, The cleaning agent has one or more of the following characteristics: The secondary alcohol polyoxyethylene ether is a C12~C14 secondary alcohol polyoxyethylene ether, and the number of ethylene oxide additions in the secondary alcohol polyoxyethylene ether is 4~20; The alcohol ether organic cosolvent is dipropylene glycol dimethyl ether; The alcohol ether organic co-solvent, based on the total weight of the cleaning agent, is 5-15 wt%. The corrosion inhibitor comprises 0.3 to 2.0 wt% of the total weight of the cleaning agent. The chelating agent comprises 0.2 to 0.8 wt% of the total weight of the cleaning agent. The polishing agent comprises 1.5 to 5.0 wt% of the total weight of the cleaning agent. The cleaning aid, based on the total weight of the cleaning agent, is 0.5-5.0 wt%; and The fragrance is 0.01-1.0 wt% of the total weight of the cleaning agent.

6. The cleaning agent as described in claim 4, characterized in that, The cleaning agent has one or more of the following characteristics: The alcohol ether organic co-solvent is 10-12 wt% of the total weight of the cleaning agent; The corrosion inhibitor comprises 0.5 to 1.5 wt% of the total weight of the cleaning agent. The chelating agent comprises 0.3-0.5 wt% of the total weight of the cleaning agent. The polishing agent comprises 2.0 to 3.0 wt% of the total weight of the cleaning agents. The cleaning aid, based on the total weight of the cleaning agent, is 1.0~2.0 wt%; and The fragrance is 0.05 to 0.5 wt% of the total weight of the cleaning agent.

7. An engine cleaner, characterized in that, The cleaning agent, by total weight, contains the following components: Alkyl glycosides 2-8 wt%, Glycolipid anionic surfactants 10-20 wt%. Secondary alcohol polyoxyethylene ether 7~12 wt%, 5-15 wt% of alcohol ether organic cosolvents Corrosion inhibitor 0.3~2.0 wt%. Chelating agent 0.2~0.8 wt%. Brightener 1.5~5.0 wt%. Cleaning aids 0.5-5.0 wt%. Fragrance 0.01-1.0 wt%, and Water balance; in, The alkyl glycoside is a C8-C16 alkyl glycoside. The glycolipid anionic surfactant is selected from one or more of trehalose lipids, rhamnose lipids, sophorose lipids, and mannoerythritol lipids. The secondary alcohol polyoxyethylene ether is a C8~C15 secondary alcohol polyoxyethylene ether, and the number of ethylene oxide additions in the secondary alcohol polyoxyethylene ether is 3~30.

8. The cleaning agent as described in claim 7, characterized in that, The cleaning agent, by total weight, contains: Dodecyl glycoside 2.5~7 wt%, rhamnolipin 12-18 wt%, 8-10 wt% of C12-C14 secondary alcohol polyoxyethylene ether 10-12 wt% of dipropylene glycol dimethyl ether Benzotriazole 0.7~0.9 wt%. Sodium citrate 0.3~0.5 wt%. Silicone oil emulsion 2.5~3.0 wt%. Sodium hydroxide 1.0~2.0 wt%. Fragrance 0.15~0.25 wt%, and Water balance.

9. A method for preparing a cleaning agent as described in any one of claims 1-8, characterized in that, The method includes: first, mixing water, alkyl glycosides, secondary alcohol polyoxyethylene ethers and glycolipid anionic surfactants evenly, and then adding the remaining components.

10. The use of the cleaning agent as described in any one of claims 1-8 in reducing penetration time, reducing water consumption for thorough cleaning, and / or increasing the cleaning-to-dirt ratio.

11. The application of a mixture of alkyl glycosides, secondary alcohol polyoxyethylene ethers, and glycolipid anionic surfactants in the preparation of engine cleaners, characterized in that: In the cleaning agent, the alkyl glycoside is a C8-C16 alkyl glycoside, the glycolipid anionic surfactant is selected from one or more of trehalose, rhamnose, sophorose, and mannoerythritol, and the secondary alcohol polyoxyethylene ether is selected from at least one of C8-C15 secondary alcohol polyoxyethylene ethers, wherein the ethylene oxide addition number in the secondary alcohol polyoxyethylene ether is 3-30. In the cleaning agent, the mass ratio of the alkyl glycoside, the glycolipid anionic surfactant, and the secondary alcohol polyoxyethylene ether is (3~7):(13~18):(8~10).

12. The application as described in claim 11, characterized in that, The cleaning agent has a cleaning efficiency of ≥96%. The cleaning agent has a cloud point ≥96℃. The penetration time of the cleaning agent is ≤2 minutes. The cleaning agent requires ≤0.8 L of water to thoroughly clean oil stains. The surface tension of the cleaning agent is ≤20 mN / m.

13. The application as described in claim 11, characterized in that, The ethylene oxide addition number in the secondary alcohol polyoxyethylene ether is 4~20.

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