CN117778110A

CN117778110A - Cleaning agent and preparation method thereof, aerosol and cleaning method of throttle valve

Info

Publication number: CN117778110A
Application number: CN202311818977.XA
Authority: CN
Inventors: 申达; 何桂星; 伍世超; 程小蓉
Original assignee: Guangdong Haoshun Oudisi Technology Co ltd
Current assignee: Guangdong Haoshun Oudisi Technology Co ltd
Priority date: 2023-12-27
Filing date: 2023-12-27
Publication date: 2024-03-29

Abstract

The invention relates to a cleaning agent and a preparation method thereof, aerosol and a cleaning method of a throttle valve. The cleaning agent comprises the following components in percentage by mass: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide and 3-8% of emulsifier. The cleaning agent has the advantages of good environmental protection, simple use, no need of disassembling a throttle valve, strong cleaning capability and capability of foaming so that the dirty surfaces can be contacted with the cleaning agent.

Description

Cleaning agent and preparation method thereof, aerosol and cleaning method of throttle valve

Technical Field

The invention relates to the technical field of cleaning agents, in particular to a cleaning agent and a preparation method thereof, aerosol and a cleaning method of a throttle valve.

Background

Industrial cleaners are used for cleaning oil stains adhering to surfaces of vehicles, electric equipment, buildings, and the like, for example, cleaners for cleaning throttle valves of automobiles, cleaners for cleaning boilers, and the like. The traditional cleaning agent mainly comprises the following components: (1) Volatile solvent-type cleaning agents have the problem of high Volatile Organic Compound (VOC) content; (2) Water-based cleaning agents, which are mainly in the oil-in-water emulsion state, solubilize some solvents with good polarity and strong solubility in water to achieve the purpose of removing throttle oil stains and carbon deposit, for example. Although the VOC content of the cleaning agent is greatly reduced, the cleaning agent has slow oil stain dissolution, poor cleaning force and needs to be removed during cleaning, so that the construction is difficult, the drying rust-proof treatment is needed after the cleaning; (3) The cleaning agent is a cleaning agent which is not easy to volatilize, has a high flash point and is full oil-based, and mainly comprises an alkane solvent with a high flash point, base oil, a cleaning dispersant, a protective agent and the like. Although the cleaning agent has the advantages of environmental protection, safety, no corrosiveness and the like, the cleaning agent generally needs to play a good role at a high temperature (more than 80 ℃), the cleaning agent is not foamed generally, cannot contact corners or dead corners, has short residual time on the surface of a dirty place, and causes incomplete and incomplete cleaning.

Disclosure of Invention

Based on the above, some embodiments of the invention provide a cleaning agent which has good environmental protection, is simple to use, does not need to detach a throttle valve, has strong cleaning capability, and can foam to enable the dirty surface to be contacted with the cleaning agent.

Other embodiments of the invention also provide a preparation method of the cleaning agent, an aerosol and a cleaning method of a throttle valve.

A cleaning agent, comprising, in mass percent: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide and 3-8% of emulsifier.

In some embodiments, the aromatic hydrocarbon solvent oil comprises one or more of S1500 solvent oil, trimethylbenzene, and tetramethylbenzene.

In some embodiments, the alcohol ether solvent comprises one or more of ethylene glycol butyl ether and diethylene glycol butyl ether.

In some embodiments, the emulsifier comprises one or more of polyoxyethylene ether of isomeric alcohol, polyoxyethylene nonylphenol ether and polyoxyethylene fatty alcohol ether.

In some embodiments, the cleaning agent further comprises 1% -5% of n-alcohol by mass;

optionally, the n-alcohol has a carbon number of 9 or less;

optionally, the n-alcohol comprises one or more of n-butanol and n-octanol.

In some embodiments, the cleaning agent further comprises less than or equal to 5% by mass of polyetheramine.

In some of these embodiments, the cleaning agent comprises, in mass percent: 25-28% of water, 30-35% of aromatic hydrocarbon solvent oil, 7-10% of oleic acid, 3-5% of organic base, 9-11% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide, 3-8% of emulsifier, 3-5% of normal alcohol and 1-3% of polyether amine.

In some of these embodiments, the cleaning agent is a water-in-oil microemulsion.

A preparation method of the cleaning agent comprises the following steps:

the preparation method comprises the following steps of: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide and 3-8% of emulsifier;

and mixing the raw materials to prepare the cleaning agent.

In some of these embodiments, the feedstock further comprises one or more of n-alcohol and polyetheramine, and the step of mixing the feedstock comprises:

mixing aromatic hydrocarbon solvent oil, alcohol ether solvent, coconut oil fatty acid diethanolamide, normal alcohol and polyether amine under stirring to prepare oily solution;

stirring and mixing water, organic alkali and an emulsifying agent to prepare an aqueous solution;

and adding the aqueous solution into the oily solution under the stirring state, uniformly mixing, and adding oleic acid to prepare the cleaning agent.

An aerosol comprises the cleaning agent and propellant.

In some embodiments, the propellant accounts for 10% -35% of the cleaning agent by mass;

optionally, the propellant comprises liquefied petroleum gas.

A cleaning method of a throttle valve comprises the following steps:

the throttle valve was purged with the aerosol described above.

The water-in-oil microemulsion cleaning agent can be obtained by matching the components, and water is stably and uniformly wrapped in aromatic hydrocarbon solvent oil, wherein the maximum water content reaches 28%, so that the content of organic solvent in the cleaning agent is reduced, and the cleaning agent is more economical and environment-friendly. The cleaning agent can be directly sprayed on the throttle valve when cleaning the throttle valve, and residual liquid can enter the engine for combustion through the air inlet pipeline. And the secondary atomization (micro explosion) of the micro-emulsion cleaning agent in the engine can promote the combustion to be more sufficient, solve the problem that the aqueous cleaning agent cannot be directly sprayed on a throttle valve for use, and avoid damaging the engine. In addition, when the components are matched, the cleaning agent is applied to aerosol, and the contact time of the cleaning agent with dirt carbon deposit can be prolonged and the cleaning force can be improved by producing fine and durable foam, and dirt and carbon deposit at dead corners can be contacted with the cleaning agent and the cleaning force can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a process flow diagram of a method of preparing a cleaning agent in accordance with some embodiments of the present invention;

FIG. 2 is a graph showing experimental results before and after high and low temperature examination of the cleaning agent of example 1;

FIG. 3 is a graph showing the experimental results of the cleaning agent of example 1 before and after centrifugation at 3000r/min for 10 min;

FIG. 4 is a graph showing the experimental results of the cleaning agent of example 1 before and after water addition;

FIG. 5 is a graph showing the results of experiments before and after refueling with the cleaning agent of example 1;

FIG. 6 is a diagram showing the cleaning of throttle inlet, throttle inner wall and air intake passage before throttle with the cleaning agent of example 1;

FIG. 7 is a schematic view of an aerosol spray throttle valve of example 1;

FIG. 8 is a schematic representation of engine combustion after injection with the aerosol of example 1;

FIG. 9 is a graph of experimental results of the throttle inner wall and the intake duct after purging with aerosol of example 1;

FIG. 10 is a graph showing the experimental record before foaming test with the cleaning agent of example 1;

FIG. 11 is a graph of experimental recordings of foam height to the 80mL scale in a foaming test with the cleaning agent of example 1;

FIG. 12 is a graph of experimental recordings of foam height to a 40mL scale in a foaming test with the cleaning agent of example 1;

FIG. 13 is a graph of experimental recordings of foam heights less than 1mL scale in foaming tests with the cleaning agent of example 1.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to specific embodiments that are now described. Preferred embodiments of the invention are given in the detailed description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Unless otherwise indicated or contradicted, terms or phrases used in the present invention have the following meanings:

in the present invention, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, "one or more" means any one, any two or more of the listed items. Wherein "several" means any two or more.

In the present invention, the percentage concentrations referred to refer to the final concentrations unless otherwise specified. The final concentration refers to the ratio of the additive component in the system after the component is added.

The words "preferably," "more preferably," and the like in the present invention refer to embodiments of the invention that may provide certain benefits in some instances. However, other embodiments may be preferred under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

When a range of values is disclosed in the present invention, the range is considered to be continuous and includes the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range description features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein.

In the invention, the technical characteristics described in an open mode comprise a closed technical scheme composed of the listed characteristics and also comprise an open technical scheme comprising the listed characteristics.

The terms "comprising" and "having" and any variations thereof in embodiments of the present invention are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the invention may be combined with other embodiments.

The throttle valve is one of the most important parts of an automobile engine system, the throttle valve controls the air inflow of an automobile, the larger the air inflow is, the larger the oil injection quantity is controlled by an Electronic Control Unit (ECU), the stronger the energy is after combustion explosion, the piston is pushed to accelerate, and the function of controlling the rotating speed of the engine is further achieved, so that the throttle valve is also called as the throat of the automobile, and whether the automobile accelerates flexibly and idling is stable or not is determined by the throttle valve. The problems of flexible acceleration, free movement, increased oil consumption and the like of the automobile are greatly related to the cleaning of a throttle valve, and the cleaning of the throttle valve can lead an engine to be flexible and powerful. Common causes of throttle fouling are the following: (1) The dust in the environment of the vehicle is large, and the filtering property of the air inlet filter element is poor; (2) the evaporation capacity of the engine oil variety is large; (3) Engine oil steam and impurities in the crankcase are not discharged in time; (4) After flameout, the throttle leaves some gaps and sucks some dust. Therefore, the development of a throttle cleaning agent has important significance.

More and more car owners in the market use cleaning agents to clean the throttle valve, so that a good cleaning agent for the throttle valve has good cleaning force, is convenient to use, and ensures environmental protection and high economical efficiency. And if the throttle valve is convenient to use, the throttle valve is directly used on the vehicle without disassembling the throttle valve. However, if the throttle valve is not dismounted and directly washed, the volatile solvent type cleaning agent can corrode parts made of metal and rubber; the water-based cleaning agent is easy to cause the problems of ignition failure, cylinder explosion and the like; the whole oil-based cleaning agent cannot be foamed, so that corners or dead corners cannot be contacted, residues on the surface of the dirty place cannot be long, incomplete cleaning can be caused, and the cleaning force cannot be good. Based on the above, some embodiments of the invention provide a novel cleaning agent which is convenient to use, environment-friendly and good in cleaning effect.

Specifically, the first aspect of the invention provides a cleaning agent, which comprises the following components in percentage by mass: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide and 3-8% of emulsifier.

In some embodiments, the cleaning agent is in the form of a water-in-oil microemulsion.

In some embodiments, the cleaning agent can be applied in cleaning of the throttle valve. It will be appreciated that the cleaning agent described above is not limited to use in cleaning of throttle valves, but may be used in other places where oil may be present.

In a specific example, the water may be, but is not limited to, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28% by mass or a range consisting of any two of these values. Optionally, in the cleaning agent, the mass percentage of water is 25% -28%.

In a specific example, the mass percent of the aromatic solvent oil may be, but is not limited to, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40% or a range consisting of any two of these values. Optionally, in the cleaning agent, the mass percentage of the aromatic hydrocarbon solvent oil is 30% -35%.

In some embodiments, the aromatic hydrocarbon solvent oil comprises one or more of S1500 solvent oil, trimethylbenzene, and tetramethylbenzene. For example, the aromatic hydrocarbon solvent oil is S1500 solvent oil, or the aromatic hydrocarbon solvent oil is tetramethylbenzene, or the aromatic hydrocarbon solvent oil is a mixture of trimethylbenzene and tetramethylbenzene.

Although there are various solvents capable of dissolving greasy dirt, such as alcohol solvents including ethanol, isopropanol, etc., alkane solvents including C ₆ ~C ₁₂ Alkane, D series solvent oil (dearomatized solvent oil) and the like, chlorinated hydrocarbon solvents comprise methylene dichloride, n-bromopropane and the like, alcohol ether solvents comprise ethylene glycol methyl ether, ethylene glycol monobutyl ether and the like, and ester solvents comprise butyl acetate, ethyl acetate and the like. However, the inventors have found that alcohol solvents, alkane solvents, chlorinated hydrocarbon solvents such as methylene chloride are not very corrosive, butyl acetate, ethyl acetate, etc. and ketone solvents are too fast to volatilize and do not easily form water-in-oil microemulsions, while aromatic hydrocarbon solvent oils and alcohol ether solvents can dissolve carbon deposits. In addition, the alcohol ether solvent can also improve the emulsification effect and the foam richness. Thus, in some embodiments of the present invention, aromatic hydrocarbon solvent oil is selected as the main solvent and alcohol ether solvent is selected as the co-solvent.

The type and amount of surfactant determines the degree of microemulsification and the degree of subsequent aerosol foaming. Since some examples of the present invention result in a water-in-oil microemulsion, the lower the HLB value of the surfactant selected, the better and oleic acid is used. However, oleic acid is not hydrophilic, and some organic base needs to be added, so that the lipophilic oleic acid is reduced, and the hydrophilic ammonium oleate is increased. Specifically, the organic base comprises one or more of ammonia water and ethanolamine.

Specifically, in the cleaning agent, the mass percentage of oleic acid may be, but is not limited to, 5%, 6%, 7%, 8%, 9%, 10% or a range composed of any two of these values. Optionally, in the cleaning agent, the mass percentage of oleic acid is 7% -10%. In the cleaning agent, the mass percentage of the organic base may be, but is not limited to, 1%, 2%, 3%, 4%, 5%, 6% or a range composed of any two of these values. Optionally, in the cleaning agent, the mass percentage of the organic alkali is 3% -5%.

The inventors have found that the addition of oleic acid and organic base alone, regardless of the ratio of oleic acid to organic base, does not give a good emulsion, let alone a microemulsion, and therefore requires the addition of some co-solvent. Experiments show that the alcohol ether solvent can be used as a cosolvent to improve the emulsification effect and enable the emulsion to reach a microemulsion state.

In some embodiments, the alcohol ether solvent includes one or more of white water (ethylene glycol butyl ether) and heavy white water (diethylene glycol butyl ether).

In a specific example, the mass percent of the alcohol ether solvent in the cleaning agent may be, but is not limited to, 8%, 9%, 10%, 11%, 12% or any two of these values. Optionally, in the cleaning agent, the mass percentage of the alcohol ether solvent is 9% -11%.

The inventor researches and discovers that although microemulsion can be obtained by adding water, aromatic hydrocarbon solvent oil, oleic acid, organic base and alcohol ether solvent into cleaning agent, foam with good foaming capacity can not be obtained when aerosol is prepared, so that the foaming capacity is increased by adding coconut oil fatty acid diethanolamide (6502), and the substance is a nonionic surfactant, has good compatibility in water and aromatic hydrocarbon solvent oil, and has good functions of foaming, foam stabilization, infiltration decontamination, hard water resistance and the like. However, the amount of coconut oil fatty acid diethanolamide should not be too large, which would affect the HLB value of the water-in-oil system, resulting in failure of the water-in-oil emulsion.

Specifically, in the cleaning agent, the mass percentage of the coconut oil fatty acid diethanolamide may be, but is not limited to, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6% or a range consisting of any two of these values.

The coconut oil fatty acid diethanolamide is added, and meanwhile, an emulsifier is also added, so that the emulsifying effect is improved, and the stability of the microemulsion is ensured. In some embodiments, the emulsifier includes, but is not limited to, one or more of polyoxyethylene ethers of isomeric alcohols, polyoxyethylene nonylphenol ethers, and polyoxyethylene fatty alcohols. Specifically, in the cleaning agent, the mass percentage of the emulsifier may be, but is not limited to, 3%, 4%, 5%, 6%, 7%, 8% or a range composed of any two of these values.

In some embodiments, the cleaning agent comprises, in mass percent: 25-28% of water, 30-35% of aromatic hydrocarbon solvent oil, 7-10% of oleic acid, 3-5% of organic base, 9-11% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide and 3-8% of emulsifier.

Further, in some embodiments, n-alcohols may also be added to the cleaning agent. Specifically, the number of carbon atoms of the normal alcohol is 9 or less. In some of these embodiments, the n-alcohol comprises one or more of n-butanol and n-octanol. Through adding normal alcohol and alcohol ether solvent to match, can further improve the emulsification effect, make the cleaner apply to in the aerosol simultaneously, the foam is fine and smooth to feel strong, and improve the area of contact with the throttle valve, improve cleaning effect.

In some embodiments, the mass percentage of the normal alcohols in the cleaning agent is 1% -5%. In a specific example, the mass percent of n-alcohols in the cleaning agent may be, but is not limited to, 1%, 2%, 3%, 4%, 5% or any two of these values. Optionally, in the cleaning agent, the mass percentage of the n-alcohol is 3% -5%.

Specifically, in some embodiments, the cleaning agent comprises, in mass percent: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide, 3-8% of emulsifier and 1-5% of normal alcohol.

In some embodiments, polyetheramine may also be added to the cleaning agent. The addition of polyetheramine can further improve the carbon deposit removal effect at the intake valve, the exhaust valve, the engine cylinder and the like. In some of these embodiments, the polyether amine is less than or equal to 5% by mass of the cleaning agent. For example, in the cleaning agent, the mass percent of polyetheramine may be, but is not limited to, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5% or a range consisting of any two of these values. Optionally, in the cleaning agent, the mass percentage of polyetheramine is 1% -3%.

In some embodiments, the cleaning agent comprises, in mass percent: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide, 3-8% of emulsifier and less than or equal to 5% of polyether amine.

Further, in some embodiments, the cleaning agent comprises, in mass percent: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide, 3-8% of emulsifier, 1-5% of normal alcohol and less than or equal to 5% of polyether amine.

Further, in some embodiments, the cleaning agent comprises, in mass percent: 25-28% of water, 30-35% of aromatic hydrocarbon solvent oil, 7-10% of oleic acid, 3-5% of organic base, 9-11% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide, 3-8% of emulsifier, 3-5% of normal alcohol and 1-3% of polyether amine.

In a specific example, the cleaning agent comprises, by mass, 25% of water, 35% of aromatic hydrocarbon solvent oil, 8% of oleic acid, 4% of organic base, 10% of alcohol ether solvent, 5% of coconut fatty acid diethanolamide, 5% of emulsifier, 5% of n-alcohol and 3% of polyetheramine. In another specific example, the cleaning agent includes 28% water, 35% aromatic hydrocarbon solvent oil, 8% oleic acid, 4% organic base, 10% alcohol ether solvent, 5% coconut oil fatty acid diethanolamide, 5% emulsifier, and 5% normal alcohol.

The cleaning agent has at least the following advantages:

(1) The cleaning agent can obtain the water-in-oil microemulsion state cleaning agent by matching the components, and the deionized water is stably and uniformly wrapped in the aromatic hydrocarbon solvent oil, wherein the highest water content reaches 28%, so that the content of the organic solvent of the throttle cleaning agent is reduced, the environment is protected, and the economical efficiency is realized.

(2) The cleaning agent can be directly sprayed on the throttle valve when the throttle valve is cleaned, and residual liquid can enter the engine for combustion through the air inlet pipeline. In addition, the cleaning agent is in a micro-emulsified state, and is similar to the secondary atomization (micro-explosion) of micro-emulsion fuel in the engine, so that the combustion can be promoted more fully, the problem that the water-containing cleaning agent for the throttle valve cannot be directly sprayed on the throttle valve for use is solved, and the engine is prevented from being damaged.

(3) When the cleaning agent is applied to aerosol, the contact time of the cleaning agent with dirt carbon deposit can be prolonged and the cleaning force can be improved by producing fine and durable foam; can also make dirt and carbon deposit at dead corners contact with the cleaning agent, thereby improving the cleaning force.

The second aspect of the invention provides a preparation method of a cleaning agent, comprising the following steps:

mixing the raw materials to prepare the cleaning agent.

In some embodiments, the step of mixing the raw materials comprises:

uniformly stirring aromatic hydrocarbon solvent oil, alcohol ether solvent and coconut oil fatty acid diethanolamide to prepare an oily solution;

uniformly stirring water, organic alkali and an emulsifying agent to prepare an aqueous solution;

adding the aqueous solution into the oily solution under stirring, mixing uniformly, and adding oleic acid to prepare the cleaning agent.

Referring to fig. 1, in some embodiments, the method for preparing the cleaning agent includes the following steps:

step S110: the preparation method comprises the following steps of: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide and 3-8% of emulsifier.

Step S120: and uniformly stirring aromatic hydrocarbon solvent oil, alcohol ether solvent and coconut oil fatty acid diethanolamide to prepare an oily solution.

Step S130: stirring water, organic alkali and emulsifier uniformly to prepare aqueous solution.

Step S140: adding the aqueous solution into the oily solution under stirring, mixing uniformly, and adding oleic acid to prepare the cleaning agent.

In some embodiments, the raw materials further comprise one or more of n-alcohol and polyetheramine, and one or more of n-alcohol and polyetheramine is added in the step of preparing the oily solution.

In some embodiments, the rotational speed of the agitation is 60r/min to 120r/min. In one specific example, the rotational speed of the agitation may be, but is not limited to, 60r/min, 70r/min, 80r/min, 90r/min, 100r/min, 110r/min, 120r/min, or a range of any two of these values.

The water-in-oil microemulsion cleaning agent can be obtained through the steps.

A third aspect of the invention provides an aerosol formulation comprising a cleaning agent as described above and a propellant.

In some embodiments, the propellant may be conventional in the art, such as liquefied petroleum gas. The liquefied petroleum gas is a mixture of propane and butane. In one specific example, the liquefied petroleum gas includes 30% propane and 70% butane, also referred to as 3:7 low pressure gas.

In some embodiments, the mass of the propellant is 10% -35% of the mass of the cleaning agent. For example, the percentage of the propellant mass to the cleaning agent mass may be, but is not limited to, 10%, 12%, 15%, 18%, 20%, 22%, 25%, 28%, 30%, 32%, 35% or any two of these values. Optionally, the mass of the propellant accounts for 20% -25% of the mass of the cleaning agent.

Under the gas-material ratio, the air-material ratio is matched with the cleaning agent, so that the aerosol foaming effect is good, the foaming is fine and uniform, and the dirt cleaning capability of the dead angle of the throttle valve is improved.

A fourth aspect of the present invention provides a cleaning method of a throttle valve, comprising the steps of:

the throttle valve was purged with the aerosol described above.

Specifically, aerosol is injected on the throttle valve.

In order to make the objects and advantages of the present invention more apparent, the following more detailed description of the cleaning agent and its effects will be given in connection with the specific examples, which are to be construed as merely illustrative and not limitative of the present invention. The following examples, unless otherwise specified, do not include other components than the unavoidable impurities. The drugs and apparatus used in the examples are all routine choices in the art, unless specifically indicated. The experimental methods without specific conditions noted in the examples were carried out according to conventional conditions, such as those described in the literature, books, or recommended by the manufacturer.

Example 1

The embodiment provides a cleaning agent, which comprises the following components in percentage by mass: 25% of deionized water, 1500 35% of aromatic hydrocarbon solvent oil S1500 35%, 4% of ethanolamine, 6502% of oleic acid, 8% of white water preventing water, 10% of n-octanol, 5% of isomeric tridecanol polyoxyethylene ether and 3% of polyether amine.

The preparation steps of the cleaning agent of the embodiment are as follows:

(1) Weighing the raw materials according to the mass percentage.

(2) Aromatic hydrocarbon solvent oil S1500, polyether amine, white water preventing water, n-octanol and 6502 are dissolved and stirred uniformly to form oily solution.

(3) And uniformly stirring deionized water, ethanolamine and isomeric tridecanol polyoxyethylene ether to form an aqueous solution.

(4) Slowly adding the aqueous solution into the oily solution, and stirring at a rotating speed of 80 rpm. And uniformly stirring, adding oleic acid, and continuously stirring to obtain clear feed liquid, namely the cleaning agent in the embodiment.

The embodiment also provides an aerosol, which comprises the cleaning agent and liquefied petroleum gas (comprising 30% of propane and 70% of butane), wherein the mass ratio of the cleaning agent to the liquefied petroleum gas is 100:20.

example 2

The embodiment provides a cleaning agent, which comprises the following components in percentage by mass: 25% of deionized water, 25% of tetramethylbenzene, 10% of trimethylbenzene, 4% of ammonia water, 6502% of oleic acid, 8% of white water, 10% of water, 5% of n-octanol, 5% of isomeric tridecanol polyoxyethylene ether and 3% of polyether amine.

The preparation steps of the cleaning agent of the embodiment are as follows:

(1) Weighing the raw materials according to the mass percentage.

(2) The tetramethylbenzene, the trimethylbenzene, the polyetheramine, the large white water preventing water, the n-octanol and 6502 are dissolved and stirred uniformly to form oily solution.

(3) Deionized water, ammonia water and isomeric alcohol trideceth are stirred uniformly to form aqueous solution.

The embodiment also provides an aerosol, which comprises the cleaning agent and liquefied petroleum gas (comprising 30% of propane and 70% of butane), wherein the mass ratio of the cleaning agent to the liquefied petroleum gas is 100:30.

example 3

The embodiment provides a cleaning agent, which comprises the following components in percentage by mass: 28% of deionized water, 35% of tetramethylbenzene, 4% of ammonia water, 6502% of oleic acid, 8% of large-scale white water, 10% of n-octanol, 5% of nonylphenol polyoxyethylene ether and 5% of nonylphenol polyoxyethylene ether.

The preparation steps of the cleaning agent of the embodiment are as follows:

(1) Weighing the raw materials according to the mass percentage.

(2) The tetramethylbenzene, the white water, the n-octanol and 6502 are dissolved and stirred uniformly to form oily solution.

(3) Deionized water, ammonia water and polyoxyethylene nonylphenol ether are stirred uniformly to form an aqueous solution.

(4) Slowly adding the aqueous solution into the oily solution, and stirring at a rotating speed of 80 rpm.

the compositions of the cleaners and aerosols of the above examples are shown in particular in table 1 below.

Example 4 to example 6

Specific compositions of the cleaning agents of examples 4 to 6 are shown in table 2, and the preparation steps are the same as those of example 1, and are not repeated.

Specific compositions of the aerosols of examples 4 to 6 are shown in table 2.

TABLE 1 composition of cleaning agent and aerosol of example 1-example 3

Table 2 composition of cleaning agent and aerosol of examples 4 to 6

TABLE 3 compositions of cleaners and aerosols of comparative examples 1 to 3

Table 4 composition of the cleaning agent and aerosol of comparative example 4

Comparative example 1

Comparative example 1 provides a cleaning agent and aerosol, which differs from example 1 in that: the compositions of the cleaners and aerosols of comparative example 1, replacing 6502 with 6501, are specifically shown in table 3.

Comparative example 2

Comparative example 2 provides a cleaner and aerosol formulation as shown in table 3.

Comparative example 3

Comparative example 3 provides a cleaner and aerosol formulation as shown in table 3.

Comparative example 4

Comparative example 4 provides a cleaner and aerosol formulation as shown in table 4.

The following are the test parts:

1. determination of the microemulsion:

(1) Checking at high and low temperature for 1 month (-10 ℃ to 50 ℃), and checking whether the feed liquid is clear or not, and forming microemulsion if the feed liquid is clear.

(3) After centrifugation at 3000r/min for 10min, it was observed whether delamination and transparency remained after centrifugation. If still clear, transparent, a microemulsion is formed.

(3) And (3) continuously adding a small amount of oily solvent or deionized water into the feed liquid, and forming the microemulsion if the feed liquid is still clear.

The graphs of the experimental results before and after the high and low temperature test of the cleaning agent of example 1 are shown in fig. 2, respectively, the left side of fig. 1 is before the test, and the right side is after the test. As can be seen from FIG. 2, the throttle cleaning agent is clear and transparent solution before and after 1 month of high and low temperature examination, no layering occurs, and the stability is good.

FIG. 3 shows graphs of experimental results before and after centrifugation at 3000r/min for 10min for the cleaning agent of example 1. As can be seen from FIG. 3, the cleaning agent is a clear and transparent solution before and after centrifugation, and has no delamination and good stability.

The experimental results of the cleaning agent of example 1 before and after adding water are shown in fig. 4, and it can be seen from fig. 4 that deionized water is slowly added dropwise to the cleaning agent of example 1, and still is a transparent liquid.

The results of experiments before and after refueling of the detergent of example 1 are shown in fig. 5, and it can be seen from fig. 5 that gasoline is slowly dropped into the detergent of example 1, and still is a transparent liquid.

From the above experiments, it can be seen that the cleaning agent of example 1 can dissolve both water and oil, and the centrifugation does not delaminate, and is not turbid, and the high and low temperature feed liquid is still transparent, which proves that the cleaning agent of example 1 has reached the microemulsion state.

2. And (3) a throttle valve cleaning process:

(1) Opening a cover of the automobile, finding an air inlet manifold, detaching the air inlet manifold, observing the inside of a throttle valve, and photographing, wherein in fig. 6, (a), (b) and (c) are physical drawings of an air inlet, the inner wall of the throttle valve and an air inlet channel before cleaning respectively;

(2) The cleaning agent of example 1 was fitted with a nozzle and thoroughly shaken; uniformly spraying the cleaning agent into each dirty place of the throttle valve for about 20-25s, and standing for 3 minutes, wherein the spraying is shown in figure 7;

(3) The engine keeps rotating speed of 1000rpm-2000rpm until white smoke disappears, as shown in fig. 8, the white smoke is shown in the frame;

(4) Closing the engine, standing for 5 minutes, photographing, and installing an air filter back, wherein the cleaned throttle inner wall and the air inlet channel are shown in fig. 9, the left side (a) in fig. 9 is the cleaned throttle inner wall, and the right side (b) is the cleaned air inlet channel;

(5) See if the vehicle is normal.

And comparing the pictures before and after cleaning, the oil dirt carbon deposit is obviously cleaned, and the vehicle can be normally ignited, normally idle and normally run without abnormality. Through the test, the feed liquid can be directly used on a throttle valve and an air inlet channel, and has extremely strong cleaning capability. And the feed liquid is combusted by the engine, so that the engine is not damaged.

3. Foaming test

(1) The measuring cylinder is cleaned and dried, and the experimental record is shown in figure 10;

(2) Spraying the spray head aiming at the bottom of the measuring cylinder;

(3) As shown in fig. 11, the injection is stopped until the feed liquid reaches the 80mL scale, and the recording time t1 is 13:57:53;

(4) As shown in FIG. 12, the time T2 for the foam height to reach 40mL was recorded as 13:58:40, and T was obtained from T2 and T1 _1/2 47s;

(5) As shown in FIG. 13, a time t3 at which the foam height was less than 1mL was recorded as 13:59:42;

(6) As shown in FIG. 13, the volume V of the cylinder feed solution was recorded as 16mL.

According to the formula foaming coefficient=80/v×100%, a foaming coefficient of 500% is obtained, and the larger the foaming coefficient is, the stronger the foaming capability is.

T _1/2 The larger the defoaming capability, the weaker the foam and dirt contact time, and the better the cleaning power.

From the above test, it can be seen that the sprayed material liquid of the cleaning agent of the above embodiment has abundant foaming, a foaming coefficient as high as 500%, and fine foam. Better foam durability, T _1/2 Up to 47s, indicating good cleaning power.

4. The technical indexes are shown in the following table 5:

TABLE 5

It should be noted that examples 1 to 6 have the performance equivalent to that of example 1, and are not repeated here.

The properties of the cleaners and aerosols of comparative examples 1 to 4 are shown in table 6 below.

TABLE 6 Properties of cleaners and aerosols of comparative examples 1 to 4

As can be seen from the above Table 6, the cleaning agents of comparative examples 1 to 4 are unsatisfactory in part of the properties, such as low foaming coefficient, T _1/2 Short time, delamination in centrifugation test, etc.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present invention, which facilitate a specific and detailed understanding of the technical solutions of the present invention, but are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. It should be understood that, based on the technical solutions provided by the present invention, those skilled in the art can obtain technical solutions through logical analysis, reasoning or limited experiments, which are all within the protection scope of the appended claims. The scope of the patent is therefore intended to be covered by the appended claims, and the description and drawings may be interpreted as illustrative of the contents of the claims.

Claims

1. A cleaning agent, which is characterized by comprising the following components in percentage by mass: 20-28% of water, 30-40% of aromatic hydrocarbon solvent oil, 5-10% of oleic acid, 1-6% of organic base, 8-12% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide and 3-8% of emulsifier.

2. The cleaning agent according to claim 1, wherein the aromatic hydrocarbon solvent oil comprises one or more of S1500 solvent oil, trimethylbenzene, and tetramethylbenzene.

3. The cleaning agent according to claim 1, wherein the alcohol ether solvent comprises one or more of ethylene glycol butyl ether and diethylene glycol butyl ether.

4. The cleaning agent according to claim 1, wherein the emulsifier comprises one or more of polyoxyethylene ether of isomeric alcohol, polyoxyethylene nonylphenol ether and polyoxyethylene ether of fatty alcohol.

5. The cleaning agent according to any one of claims 1 to 4, further comprising one or more of the following components:

(1) The cleaning agent also comprises 1-5% of n-alcohol by mass percent;

optionally, the n-alcohol has a carbon number of 9 or less;

optionally, the n-alcohol comprises one or more of n-butanol and n-octanol;

(2) The cleaning agent also comprises less than or equal to 5% by mass of polyether amine.

6. The cleaning agent according to claim 5, characterized in that the cleaning agent comprises, in mass percent: 25-28% of water, 30-35% of aromatic hydrocarbon solvent oil, 7-10% of oleic acid, 3-5% of organic base, 9-11% of alcohol ether solvent, 3-6% of coconut oil fatty acid diethanolamide, 3-8% of emulsifier, 3-5% of normal alcohol and 1-3% of polyether amine.

7. The cleaning agent according to any one of claims 1 to 4 and 6, wherein the cleaning agent is a water-in-oil type microemulsion.

8. The preparation method of the cleaning agent is characterized by comprising the following steps:

and mixing the raw materials to prepare the cleaning agent.

9. The method for preparing a cleaning agent according to claim 8, wherein the raw materials further include one or more of n-alcohol and polyetheramine, and the step of mixing the raw materials comprises:

10. An aerosol comprising a cleaning agent according to any one of claims 1 to 7 or a cleaning agent prepared by the preparation method according to any one of claims 8 to 9 and a propellant.

11. The aerosol of claim 10, wherein the propellant comprises 10% -35% by mass of the cleaning agent;

optionally, the propellant comprises liquefied petroleum gas.

12. A cleaning method of a throttle valve is characterized by comprising the following steps:

the throttle valve is cleaned with the aerosol as claimed in any one of claims 10 to 11.