Cleaning composition for ink removal, cleaning solvent, and paint cleaning method

Abstract

Disclosed embodiments relate to a cleaning composition, a cleaning solvent, and a paint cleaning method. The cleaning composition according to an embodiment may contain hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol at a weight ratio of 1 to 5: 1 to 5: 1 to 5.

Description

Cleaning composition for removing ink, cleaning solvent and paint cleaning method

[0001] The present disclosure relates to a cleaning composition, a cleaning solvent and a paint cleaning method, and more particularly, to a cleaning composition, a cleaning solvent and a paint cleaning method which have a high flash point, no offensive odor, are reusable and can remove both oil-based paint and water-based paint.

[0002] Cleaning solvents are substances used to easily clean objects. However, conventional paint cleaning solvents contain ingredients harmful to the human body, have extremely low flash points, pose a risk of fire and explosion, emit a strong foul odor, are corrosive to objects being cleaned, and are difficult to dispose of.

[0003] Therefore, there is a need for cleaning compositions, cleaning solvents and paint cleaning methods that are relatively safe for the human body, odorless, have a relatively high flash point, do not corrode the object to be cleaned and are easy to dispose of or recycle.

[0004] Various embodiments of the present disclosure are intended to provide a cleaning composition, a cleaning agent, and a paint cleaning method that enable paint cleaning work to be performed in a relatively safe environment free from substances harmful to the human body.

[0005] In addition, various embodiments of the present disclosure are intended to provide a cleaning composition, a cleaning agent, and a paint cleaning method that enable paint cleaning work to be performed in a pleasant environment free of odor.

[0006] In addition, various embodiments of the present disclosure are intended to provide a cleaning composition, a cleaning agent, and a paint cleaning method that can perform paint cleaning work without the risk of fire and explosion.

[0007] In addition, various embodiments of the present disclosure are intended to provide a cleaning composition, a cleaning solvent, and a paint cleaning method that do not corrode a cleaning object.

[0008] Additionally, various embodiments of the present disclosure are intended to provide a cleaning composition, a cleaning solvent, and a paint cleaning method that can reuse the cleaning composition and the cleaning solvent hundreds of times.

[0009] Additionally, various embodiments of the present disclosure are intended to provide a cleaning composition, a cleaning solvent, and a paint cleaning method capable of cleaning both oil-based paints and water-based paints.

[0010] The problems to be solved through the embodiments of the present disclosure are not limited to the problems described above, and problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the embodiments belong from this specification and the attached drawings.

[0011] The cleaning composition according to the present disclosure may contain hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of 1 to 5:1 to 5:1 to 5.

[0012] The cleaning solvent according to the present disclosure contains hexylene glycol, diethylene glycol monobutyl ether and 3-methoxy-3-methyl-1-butanol in a weight ratio of 1 to 5:1 to 5:1 to 5, and may further contain water.

[0013] The paint washing method according to the present disclosure can remove paint from the surface of an object to be washed using a washing solvent containing hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of 1 to 5:1 to 5:1 to 5, and further containing water.

[0014] According to the cleaning composition, cleaning solvent and paint cleaning method according to various embodiments of the present disclosure, paint cleaning work can be performed in a relatively safe environment free from substances harmful to the human body.

[0015] In addition, according to the cleaning composition, cleaning solvent and paint cleaning method according to various embodiments of the present disclosure, paint cleaning work can be performed in a pleasant environment without an unpleasant odor.

[0016] In addition, according to the cleaning composition, cleaning solvent and paint cleaning method according to various embodiments of the present disclosure, paint cleaning work can be performed without the risk of fire and explosion.

[0017] In addition, according to the cleaning composition, cleaning solvent and paint cleaning method according to various embodiments of the present disclosure, paint cleaning work can be performed without corroding the object to be cleaned.

[0018] Additionally, according to the cleaning composition, cleaning solvent and paint cleaning method according to various embodiments of the present disclosure, the cleaning composition and cleaning solvent can be reused hundreds of times.

[0019] Additionally, according to the cleaning composition, cleaning solvent and paint cleaning method according to various embodiments of the present disclosure, both oil-based paint and water-based paint can be cleaned.

[0020] The effects of the embodiments are not limited to the effects described above, and effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the embodiments belong from this specification and the attached drawings.

[0021] The terms used in the examples are selected from widely used, common terms, taking into account the functions of the present disclosure. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the relevant description of the invention. Therefore, the terms used in this disclosure should not be defined simply as names, but rather based on the meanings of the terms and the overall content of the present disclosure.

[0022] When a part of a specification is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise stated.

[0023] In addition, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present disclosure.

[0024] A singular expression may include a plural expression unless the context clearly indicates otherwise.

[0025] Below, embodiments of the present disclosure are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present disclosure. However, the present disclosure may be implemented in various different forms and is not limited to the embodiments described herein.

[0026] Regardless of the drawing symbol, identical or similar components are given the same reference number and redundant descriptions thereof may be omitted.

[0027] All technical terms used in this disclosure, unless otherwise defined, have the same meaning as commonly understood by those of ordinary skill in the art to which this disclosure pertains. Furthermore, while preferred methods and samples are described in this disclosure, similar or equivalent methods are also included within the scope of this disclosure.

[0028] In this disclosure, the expression "A to B" has the same meaning as "A or more and B or less." In addition, the symbol "~" in this disclosure has the same meaning as "between." Therefore, in this disclosure, both "A to B" and "A to B" mean "including all numerical ranges therebetween, including A and B."

[0029] In this disclosure, the term "cleaning composition" refers to a composition containing chemicals with high cleaning power and effective removal of contaminants from an object to be cleaned. The cleaning composition may contain various substances depending on the intended use. For example, the cleaning composition may contain acetone, methylethanol, trichloroethane, etc. The cleaning composition may contain a surfactant or soda to remove oil and fat. The surfactant can reduce the surface tension between the object to be cleaned and the contaminant, thereby enabling effective cleaning. The cleaning composition may contain a stain-removing ingredient or a bleaching ingredient. The cleaning composition may also contain additional ingredients, such as a fragrance, a disinfectant, a preservative, a corrosion inhibitor, a stabilizer, and an additive, as needed. The fragrance can improve the odor of the cleaning composition, thereby enhancing user convenience. The stabilizer can maintain the stability of the cleaning composition, and the additive can improve the cleaning performance of the cleaning composition under certain conditions. The substances that the cleaning composition may contain in the present disclosure are not limited to the aforementioned substances.

[0030] As used herein, "cleaning agent" refers to a substance that contains the aforementioned cleaning composition and is capable of being used to clean an object to be cleaned. The cleaning agent can be used to remove contaminants from the object to be cleaned and disinfect the surface of the object to be cleaned. The cleaning agent may contain the cleaning composition and water. Alternatively, the cleaning agent may be the cleaning composition itself. The substances that the cleaning agent may contain in the present disclosure are not limited to the aforementioned substances.

[0031] In the present disclosure, the “paint cleaning method” may be a method of removing paint from the surface of an object to be cleaned using a cleaning solvent.

[0032] In the present disclosure, "room temperature" means a normal temperature, and means a temperature of about 15°C to 25°C. The paint cleaning method using a cleaning solvent including a cleaning composition may be performed at room temperature, but the temperature at which the present disclosure may be performed is not limited to room temperature.

[0033] "Volatile substances" are substances that can vaporize at room temperature. Volatile substances may have a "flash point." The flash point of a volatile substance is the lowest temperature at which it can vaporize and ignite. When a volatile substance reaches its flash point, it can mix with air and ignite. While volatile substances that have reached their flash point do not sustain combustion, they can still ignite and ignite other substances. Because volatile substances that reach their flash point pose a risk of ignition, flash point can serve as an indicator of the safety of a volatile substance. Users of volatile substances can use flash point data to determine their safety when using, storing, etc. For example, volatile substances with relatively high flash points are generally considered safer than those with lower flash points, but flash point alone is not the sole determinant of a volatile substance's safety.

[0034] Volatile substances can have an "ignition point." The ignition point is the lowest temperature at which a substance will combust. When a substance reaches its ignition point, combustion can occur. A substance that has reached its ignition point can continue to combust. The ignition point is different from the flash point. The ignition point of a volatile substance is generally higher than its flash point. The flash point can also serve as an indicator of the safety of a volatile substance.

[0035] The main ingredient of conventional paint removal cleaning agents is an organic compound containing N-propyl acetate, with a molecular formula of C-5H. 10 O2 and is included in esters. Organic cleaning solvents containing organic compounds such as N-propyl acetate are colorless, transparent liquids and are used to remove ink, paint, adhesives, etc. applied to metals, plastics, etc. Since these organic cleaning solvents contain ingredients harmful to the human body, users may be exposed to respiratory diseases and skin diseases due to vapors when used for a long time. In addition, organic cleaning solvents containing organic compounds such as N-propyl acetate have a flash point of approximately 12°C to 14°C, which is very low, so there is a risk of fire and explosion and safety is extremely low, so special care must be taken by users. In addition, organic cleaning solvents containing organic compounds such as N-propyl acetate had the problem of being accompanied by a pungent odor.

[0036] Users of conventional organic cleaning solvents containing organic compounds such as N-propyl acetate had to wear equipment such as gas masks to avoid adverse effects on the human body and foul odors, which was inconvenient to use. Furthermore, while organic cleaning solvents containing organic compounds such as N-propyl acetate could remove oil-based paint, they were not effective in removing water-based paint. Furthermore, users of organic cleaning solvents containing organic compounds such as N-propyl acetate had to incur additional costs for paint cleaning, such as installing explosion-proof equipment to prevent the risk of fire or explosion. Furthermore, organic cleaning solvents containing organic compounds such as N-propyl acetate require special disposal procedures due to their toxicity, which wastes time and money. Furthermore, organic cleaning solvents containing organic compounds such as N-propyl acetate corrode not only the paint but also the object to be cleaned, and they dissolve together with the paint, making them unreusable, which was a problem of high cost.

[0037] The cleaning composition according to the embodiments of the present disclosure can be used to remove paint from the surface of an object to be cleaned.

[0038] The cleaning composition according to the embodiments of the present disclosure may include hexylene glycol. For example, the content of hexylene glycol in the cleaning composition may be 10 to 30 wt%, but is not limited thereto. Hexylene glycol is the same substance as "2-methyl-2,4-pentanediol", and the molecular formula is C-6H. 14O2 and is included in polyhydric alcohols. Hexylene glycol is an organic compound with strong solubility, so it can effectively remove contaminants such as paint, ink, and varnish from the surface of the object to be cleaned. Hexylene glycol is a chemical substance with low volatility and good solubility, so it can prevent paint from drying when cleaning, remove surface residues, and protect the surface of the object to be cleaned. In addition, hexylene glycol has sterilizing and preservative functions, so it can suppress the growth of bacteria and microorganisms during the cleaning process of the object to be cleaned, and it can enable the recycling of the cleaning composition. In addition, hexylene glycol can act as a surfactant and is easy to dispose of because it has a low environmental impact. The flash point of hexylene glycol is approximately 93.3°C or higher, making it a relatively safe substance at room temperature.

[0039] The cleaning composition according to the embodiments of the present disclosure may include diethylene glycol monobutyl ether. The content of diethylene glycol monobutyl ether may be 10 to 30 wt%, but is not limited thereto. Diethylene glycol monobutyl ether is the same substance as "diethylene glycol mono-n-butyl ether", and the molecular formula is C-8H. 18O3 and is included in the polyhydric alcohols. Diethylene glycol monobutyl ether can also be called butyl carbitol. Diethylene glycol monobutyl ether has excellent solubility and can effectively remove paint, ink, grease, and other industrial contaminants from the cleaning target. Diethylene glycol monobutyl ether has a boiling point of approximately 224°C or higher, has low volatility, evaporates little at room temperature, and is a highly safe substance. Diethylene glycol monobutyl ether mixes well with various organic substances and can effectively dissolve them. Diethylene glycol monobutyl ether can be dissolved in both hydrophilic and hydrophobic solvents. Diethylene glycol monobutyl ether can be dissolved in both water and organic solvents, so it can remove both aqueous and oily contaminants from the cleaning target. Diethylene glycol monobutyl ether can effectively remove paint and other coating materials from the surface of the cleaning target, while maintaining the surface clean without damaging it.

[0040] The cleaning composition according to the embodiments of the present disclosure may include 4-(methylthio)butanol (4-(METHYLTHIO)BUTANOL). 4-(methylthio)butanol is also called MTB and has a molecular formula of C-5H. 12 OS. 4-(Methylthio)butanol has a flash point of approximately 101°C or higher, making it a safe substance at room temperature. 4-(Methylthio)butanol can provide both cleaning and odor removal functions. 4-(Methylthio)butanol can dissolve organic compounds, so it can remove paint and other contaminants from the surface of the object to be cleaned. 4-(Methylthio)butanol can effectively neutralize the odors of other substances contained in unpleasant cleaning compositions. 4-(Methylthio)butanol can improve the user convenience of cleaning compositions by improving the chemical odor that may occur in the cleaning composition.

[0041] The cleaning composition according to the embodiments of the present disclosure may include 3-methoxy-3-methyl-1-butanol. For example, the content of 3-methoxy-3-methyl-1-butanol in the cleaning composition may be, but is not limited to, 20 to 40 wt%. The molecular formula of 3-methoxy-3-methyl-1-butanol is C-6H. 14 It is O2. 3-Methoxy-3-methyl-1-butanol has a flash point of approximately 71°C or higher, making it a safe substance at room temperature. 3-Methoxy-3-methyl-1-butanol can provide cleaning, odor removal, and corrosion inhibition. As a surfactant, 3-methoxy-3-methyl-1-butanol can dissolve organic compounds, allowing it to remove paint and other contaminants from the surface of the object being cleaned. Because 3-methoxy-3-methyl-1-butanol has an appropriate evaporation rate, it can help the surface of the object being cleaned dry quickly after cleaning. 3-Methoxy-3-methyl-1-butanol can prevent corrosion of the object being cleaned that may occur during the paint cleaning process. Especially when the object being cleaned has a metal surface, it can prevent corrosion and protect the surface of the object being cleaned.

[0042] 3-Methoxy-3-methyl-1-butanol can effectively neutralize the unpleasant odors of other substances contained in unpleasant cleaning compositions and has a pleasant odor. 3-Methoxy-3-methyl-1-butanol can improve the user convenience of cleaning compositions by improving chemical odors that may occur in cleaning compositions.

[0043] The cleaning composition may include hexylene glycol, diethylene glycol monobutyl ether and 3-methoxy-3-methyl-1-butanol.

[0044] The cleaning composition can be mixed with water for use. In the present disclosure, a mixture of the cleaning composition and water can be referred to as a cleaning solvent. The cleaning solvent can include the cleaning composition and water. In the cleaning solvent, the mixing ratio of the cleaning composition and water is not particularly limited. The mixing ratio of the cleaning composition and water can be determined so as to be able to clean the paint on the surface of the object to be cleaned. The user of the cleaning solvent can appropriately determine the mixing ratio of the cleaning composition and water depending on the type of the object to be cleaned, the type of paint, and the desired cleaning performance. For example, the cleaning solvent can include the cleaning composition and water in a weight ratio of about 1:0.5 to 3. Specifically, the cleaning solvent can include the cleaning composition and water in a weight ratio of about 1:1 to 1.5. More specifically, the cleaning solvent can include the cleaning composition and water in a weight ratio of about 1:1.

[0045] According to the paint cleaning method of the present disclosure, a user can remove paint from the surface of an object to be cleaned using a cleaning solvent.

[0046] The paint cleaning method of the present disclosure may include a soaking step of immersing the object to be cleaned in a cleaning solvent for a predetermined period of time. The paint cleaning method of the present disclosure may be a method of removing paint from the surface of the object to be cleaned using the cleaning solvent after the soaking step. The predetermined time for soaking the object to be cleaned in the cleaning solvent may be appropriately adjusted depending on the surface condition of the object to be cleaned, the type of paint to be removed, the ingredients contained in the cleaning solvent, etc. For example, the object to be cleaned may be soaked in the cleaning solvent for 10 to 30 minutes to remove paint from the surface of the object to be cleaned. More specifically, the object to be cleaned may be soaked in the cleaning solvent for 15 minutes to remove paint from the surface of the object to be cleaned. The cleaning solvent and the object to be cleaned may be placed in a cleaning container. The cleaning container may have a size and shape that allows the portion of the object to be cleaned to be completely submerged. By soaking the object to be cleaned in the cleaning solvent, the paint can be more easily removed from the object to be cleaned. However, the present disclosure is not limited to the above-described contents.

[0047] The paint cleaning method of the present disclosure may include an ultrasonic vibration step of exposing the cleaning solvent to ultrasonic waves while the cleaning object is immersed in the cleaning solvent. At this time, an ultrasonic generator may be used to apply ultrasonic waves to the cleaning solvent. The ultrasonic generator may apply ultrasonic waves to the cleaning solvent for a predetermined period of time. The portion of the cleaning object from which paint is to be removed may be exposed to ultrasonic waves for a predetermined period of time. The predetermined period of time for applying ultrasonic waves to the cleaning solvent may be appropriately adjusted depending on the surface condition of the cleaning object, the type of paint to be removed, the ingredients contained in the cleaning solvent, etc. When the cleaning solvent is vibrated by ultrasonic waves, the paint can be more easily removed from the cleaning object. The cleaning solvent and the cleaning object may be contained in a cleaning container. Ultrasonic waves may be applied directly to the cleaning solvent or to the cleaning container. However, the present disclosure is not limited to the above-described contents.

[0048] The paint cleaning method of the present disclosure may include both a soaking step and an ultrasonic vibration step. The paint cleaning method of the present disclosure may be a method of removing paint from the surface of the object to be cleaned by exposing the object to ultrasonic waves and vibrating the object to be cleaned while immersing the object in a cleaning solvent. For example, the ultrasonic vibration step may be performed after the soaking step. In this case, the object to be cleaned may be immersed in the cleaning solvent, soaked for a predetermined period of time, and then the cleaning solvent may be exposed to ultrasonic waves. In another example, the soaking step may be performed after the ultrasonic vibration step. In this case, the object to be cleaned may be immersed in the cleaning solvent, the cleaning solvent may be exposed to ultrasonic waves, and then the object to be cleaned may be soaked while maintaining the object in the cleaning solvent for a predetermined period of time.

[0049] Hereinafter, embodiments of the present disclosure will be described. However, the following embodiments are merely intended to more easily explain the present disclosure, and the technical ideas of the present disclosure are not limited by the following embodiments.

[0050] According to the present disclosure, the cleaning composition may include hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 1 to 5: 1 to 5: 1 to 5.

[0051] For example, the cleaning composition may comprise hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 1 to 5:1 to 3:1 to 3. More specifically, the cleaning composition may comprise hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 5:2:2.

[0052] For another example, the cleaning composition may comprise hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 1 to 3:1 to 5:1 to 3. More specifically, the cleaning composition may comprise hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 2:5:2.

[0053] As another example, the cleaning composition may comprise hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 1 to 3:1 to 3:1 to 5. More specifically, the cleaning composition may comprise hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 2:2:5.

[0054] As another example, the cleaning composition may comprise hexylene glycol, diethylene glycol monobutyl ether and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 1:1:1.

[0055] The cleaning compositions of Examples 1 to 4 can be mixed with water in a weight ratio of about 1:0.5 to 3 to form a cleaning solvent. Using the cleaning solvent can remove paint applied to the surface of the object to be cleaned. At this time, the aforementioned soaking step or ultrasonic vibration step can be included, if necessary. The object to be cleaned can be a metal rod or a plastic rod with a stainless steel surface, but is not limited thereto. The paint applied to the surface of the object to be cleaned can be an oil-based paint or a water-based paint, but is not limited thereto.

[0056] In one embodiment, a cleaning composition comprising hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-butanol can be mixed with water to form a cleaning solvent.

[0057] According to one embodiment, the cleaning solvent may include 10 to 30 wt% of hexylene glycol, 10 to 30 wt% of diethylene glycol monobutyl ether, 20 to 40 wt% of 3-methoxy-3-methyl-butanol, and the remainder of water, based on the total weight of the cleaning solvent.

[0058] The cleaning composition according to the present disclosure may further comprise at least one of dimethyl sulfoxide (DMSO) and 1-phenoxy-2-butanol.

[0059] For example, the cleaning composition may contain hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, and dimethyl sulfoxide in a weight ratio of about 1 to 3: 1 to 3: 1 to 4: 0.3 to 2. Specifically, the cleaning composition may contain hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, and dimethyl sulfoxide in a weight ratio of about 3: 3: 4: 1. Dimethyl sulfoxide, also called sulfinyl bismethane, is a surfactant that can promote the removal of paint from the surface of the object to be cleaned. Dimethyl sulfoxide can improve the user experience by removing odors from the cleaning composition and imparting a refreshing scent. The flash point of dimethyl sulfoxide is about 87°C, which is higher than the flash points of hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, and dimethyl sulfoxide, but it is a substance that is far from the risk of fire and explosion at room temperature, so the cleaning composition of the present disclosure can still maintain safety at room temperature even if it contains dimethyl sulfoxide.

[0060] For another example, the cleaning composition may contain hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, and 1-phenoxy-2-butanol in a weight ratio of about 1 to 3: 1 to 3: 1 to 4: 1 to 2. Specifically, the cleaning composition may contain hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, and 1-phenoxy-2-butanol in a weight ratio of about 3: 3: 4: 1. 1-Phenoxy-2-butanol acts as a surfactant and can promote the removal of paint from the surface of the object to be cleaned by dissolving and decomposing components of the paint on the surface. 1-Phenoxy-2-butanol can remove odors from the cleaning composition and impart a refreshing scent, thereby improving the user experience of the cleaning composition.

[0061] The cleaning composition according to the present disclosure may include hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, dimethyl sulfoxide, and 1-phenoxy-2-butanol. Specifically, the cleaning composition may include hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, dimethyl sulfoxide, and 1-phenoxy-2-butanol in a weight ratio of about 1 to 3: 1 to 3: 1 to 4: 0.3 to 2: 0.3 to 2. More specifically, the cleaning composition may include hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, dimethyl sulfoxide, and 1-phenoxy-2-butanol in a weight ratio of about 3: 3: 4: 1: 1.

[0062] In one embodiment, a cleaning composition comprising hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-butanol dimethyl sulfoxide, and 1-phenoxy-2-butanol can be mixed with water to form a cleaning solvent.

[0063] According to one embodiment, the cleaning solvent may include, based on the total weight of the cleaning solvent, 10 to 30 wt% of hexylene glycol, 10 to 30 wt% of diethylene glycol monobutyl ether, 20 to 40 wt% of 3-methoxy-3-methyl-butanol, 5 to 10 wt% of dimethyl sulfoxide, 5 to 10 wt% of 1-phenoxy-2-butanol, and the remainder of water.

[0064] According to the present disclosure, a cleaning composition comprising hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol could be recovered and reused after cleaning the surface of an object to be cleaned. Furthermore, a cleaning composition comprising hexylene glycol, diethylene glycol monobutyl ether, 3-methoxy-3-methyl-1-butanol, dimethyl sulfoxide, and 1-phenoxy-2-butanol could also be recovered and reused after cleaning the surface of an object to be cleaned. Specifically, the cleaning composition comprising hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol maintained its cleaning power until the surface of the object to be cleaned was washed about 300 times during a test, and could effectively remove oil-based paint and water-based paint applied to the surface of the object to be cleaned.

[0065] A cleaning composition comprising three components, hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol, was confirmed by olfactory testing to have significantly reduced odor compared to a conventional paint cleaning composition or paint cleaning solvent containing N-propyl acetate, etc. In addition, a cleaning composition comprising three components, hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol, was confirmed by visual testing to have significantly superior cleaning power compared to a conventional paint cleaning composition or paint cleaning solvent containing N-propyl acetate, etc.

[0066] Examples 1 to 4: Testing of cleaning power, odor, and flash point of cleaning compositions

[0067] Table 1 shows the weight ratios of Examples 1 to 4 for the cleaning composition.

[0068] Detergent composition ingredients Example 1 (weight ratio) Example 2 (weight ratio) Example 3 (weight ratio) Example 4 (weight ratio) Hexylene glycol 5221 Diethylene glycol monobutyl ether 2521 3-methoxy-3-methyl-1-butanol 2251

[0069] The cleaning composition of Example 1 may include hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 5:2:2. The cleaning composition of Example 2 may include hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 2:5:2 (Example 2). The cleaning composition of Example 3 may include hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 1 to 3:1 to 3:1 to 5. More specifically, the cleaning composition may comprise hexylene glycol, diethylene glycol monobutyl ether and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 2:2:5.

[0070] The cleaning composition of Example 4 may include hexylene glycol, diethylene glycol monobutyl ether, and 3-methoxy-3-methyl-1-butanol in a weight ratio of about 1:1:1.

[0071] An experiment was conducted to remove paint applied to the surface of an object to be cleaned using a cleaning solvent prepared by mixing the cleaning compositions of Examples 1 to 4 with water at a weight ratio of approximately 1:1. The aforementioned soaking step or ultrasonic vibration step was included as needed. The object to be cleaned is a metal with a stainless steel surface, and the paint applied to the surface of the object to be cleaned is an oil-based paint and a water-based paint.

[0072] Oil-based paint on the surface of a cleaning object was removed using a cleaning solvent prepared by mixing the cleaning compositions of Examples 1 to 4 with water at a weight ratio of approximately 1:1. As a result of the experiment, all of the cleaning compositions of Examples 1 to 4 were able to effectively remove oil-based paint from the cleaning object.

[0073] Next, the oil-based paint on the surface of the object to be cleaned was removed using a cleaning solvent prepared by mixing the cleaning compositions of Examples 1 to 4 with water at a weight ratio of approximately 1:1. The experimental results showed that all of the cleaning compositions of Examples 1 to 4 were able to effectively remove water-based paint from the object to be cleaned.

[0074] As a result, all of the cleaning compositions of Examples 1 to 4 were able to effectively remove oil-based paint and water-based paint applied to the surface of the object to be cleaned.

[0075] The cleaning compositions of Examples 1 to 4 were recovered and reusable after cleaning the surface of the object to be cleaned. Specifically, the cleaning compositions of Examples 1 to 4 maintained their cleaning power until the surface of the object to be cleaned was washed approximately 300 times during the test, and were able to effectively remove oil-based paint and water-based paint applied to the surface of the object to be cleaned.

[0076] The cleaning compositions of Examples 1 to 4 are transparent liquids regardless of the mixing ratio with water. The cleaning compositions of Examples 1 to 4 or the cleaning solvents using them did not have a strong odor unless smelled closely, and when ventilated, there was almost no odor. In particular, the cleaning composition of Example 3 or the cleaning solvent using it had a low odor, which confirmed the odor removal effect of 3-methoxy-3-methyl-1-butanol.

[0077] Table 2 shows the results of flash point tests of the cleaning compositions of Examples 1 to 4. The flash points (°C) of the cleaning compositions of Examples 1 to 4 are as shown in Table 2 below.

[0078] Flash point of N-propyl acetate about 12°C Flash point (°C) of the cleaning composition of Example 1 about 94°C Flash point (°C) of the cleaning composition of Example 2 about 89°C Flash point (°C) of the cleaning composition of Example 3 about 88°C Flash point (°C) of the cleaning composition of Example 4 about 92.3°C

[0079] As a result of the experiment, it was confirmed that the flash point of Example 1, which was tested as a cleaning composition containing a relatively large amount of hexylene glycol, was the highest at about 94°C, which is the safest from the risk of fire and explosion at room temperature. The flash points of the cleaning compositions of Examples 2 to 4 are lower than the flash point of the cleaning solvent of Example 1, but are formed around about 90°C, confirming that they are safe from the risk of fire and explosion at room temperature like Example 1, and that they have a significantly higher flash point than the flash point of N-propyl acetate, which is about 12°C. The flash point of the cleaning solvent in which the cleaning compositions of Examples 1 to 4 are mixed with water at a weight ratio of about 1:0.5 to 3 will vary depending on the mixing ratio of water, but will be lower than the flash points in Table 2, and it can be expected that the flash point will further decrease as the weight ratio of water increases. However, since the cleaning power is expected to decrease as the weight ratio of water increases compared to the cleaning composition, the user of the cleaning composition and cleaning solvent of the present disclosure can appropriately determine the weight ratio of the cleaning composition and water according to the required cleaning power, and regardless of which weight ratio is selected, the user can be safe from the risk of fire and explosion at room temperature. Through the above results, it can be seen that the cleaning composition according to the present disclosure and the cleaning solvent containing the same not only have excellent cleaning power, but also have low odor, low toxicity, and a high flash point, making them safe at room temperature, and furthermore, can be reused about 300 times, making them very useful for removing paint from the surface of an object to be cleaned.

[0080] The present disclosure has been described above, focusing on preferred embodiments thereof. Those skilled in the art will appreciate that the present disclosure can be implemented in modified forms without departing from its essential characteristics. Therefore, the disclosed embodiments should be considered illustrative rather than restrictive. The scope of the present disclosure is set forth in the claims, and all differences within the scope equivalent thereto should be construed as being encompassed by the present disclosure.

[0081] Any or all of the embodiments of the present disclosure described above are not mutually exclusive or distinct. Any or all of the embodiments of the present disclosure described above may have their respective components or functions combined or used together.

[0082] For example, a particular embodiment may be combined with another embodiment even if not directly described.

[0083] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of this disclosure should be determined by a reasonable interpretation of the appended claims, and all changes within the equivalent scope of this disclosure are intended to be embraced therein.

Claims

1. A cleaning composition comprising hexylene glycol, diethylene glycol monobutyl ether and 3-methoxy-3-methyl-1-butanol in a weight ratio of 1 to 5:1 to 5:1 to 5.

2. In paragraph 1, A cleaning composition comprising the hexylene glycol, the diethylene glycol monobutyl ether and the 3-methoxy-3-methyl-1-butanol in a weight ratio of 1 to 5: 1 to 3: 1 to 3.

3. In paragraph 1, A cleaning composition comprising the hexylene glycol, the diethylene glycol monobutyl ether and the 3-methoxy-3-methyl-1-butanol in a weight ratio of 1 to 3:1 to 5:1 to 3.

4. In paragraph 1, A cleaning composition comprising the above hexylene glycol, the above diethylene glycol monobutyl ether and the above 3-methoxy-3-methyl-1-butanol in a weight ratio of 1 to 3:1 to 3:1 to 5.

5. In paragraph 1, A cleaning composition comprising the above hexylene glycol, the above diethylene glycol monobutyl ether and the above 3-methoxy-3-methyl-1-butanol in a weight ratio of 1:1:

1.

6. A cleaning composition according to any one of claims 1 to 5 and a cleaning agent comprising water.

7. In paragraph 6, A cleaning agent comprising the above cleaning composition and the water in a weight ratio of 1:0.5 to 3.

8. A paint cleaning method for removing paint from the surface of an object to be cleaned using a cleaning solvent according to Article 6.

9. In paragraph 8, A paint washing method comprising: a step of soaking the object to be washed in the washing solvent for a predetermined period of time; and then removing paint from the surface of the object to be washed using the washing solvent.

10. In paragraph 8, The paint cleaning method is a method of removing paint from the surface of the object to be cleaned by exposing the object to be cleaned to ultrasonic waves and vibrating the object to be cleaned while immersing the object to be cleaned in the cleaning solvent.