Lubricating composition for inhibiting clogging and method for inhibiting clogging using the same

Abstract

The present invention provides a lubricating composition for suppressing clogging, comprising a base oil and any one selected from a fatty acid and an emulsifier. The lubricating composition forms a single phase even when a carboxylic acid-based monomer is introduced into the base oil. The lubricating composition suppresses clogging during the production of a copolymer derived from a carboxylic acid-based monomer. The present invention also provides a method for suppressing clogging using the lubricating composition.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Korean Patent Application No. 10-2020-0170190 filed on December 8, 2020, with the Korean Intellectual Property Office (KIPO), the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] The present invention relates to a lubricating composition for inhibiting plugging and a method for inhibiting plugging using the lubricating composition. Background Art

[0004] Ethylene-carboxylic acid copolymers such as ethylene-acrylic acid copolymers are used in various applications such as sealing materials, adhesive materials, packaging materials, and optical films, and are widely used industrially.

[0005] Ethylene-carboxylic acid copolymers can be prepared by polymerizing ethylene with carboxylic acid-based compounds such as acrylic acid and methacrylic acid as comonomers through a continuous reactor, and since carboxylic acid-based compounds have higher self-polymerization reactivity than ethylene, self-polymerization may occur when the carboxylic acid-based compounds are exposed to high temperatures during supply through a flow path, a pump, a compressor, etc.

[0006] In this case, the above-mentioned equipment, such as pumps, compressors, and flow paths, may fail (defects), such as clogging and flow path blocking, thereby reducing the production yield of the copolymer, making it difficult to carry out the process uniformly, continuously, and repeatedly, increasing the risk of accidents and causing problems for worker safety.

[0007] Methods of using additives to suppress the self-polymerization of carboxylic acid-based monomers having high self-polymerization reactivity are being studied, but there are still problems of equipment failure, such as clogging and fouling of the above equipment due to monomer leakage.

[0008] Therefore, there is a need to develop a lubricating composition for suppressing clogging that can improve work productivity and further improve work stability by directly preventing equipment failure caused by leakage of the above-mentioned carboxylic acid-based monomer having high polymerization reactivity.

[0009] [Related technical literature]

[0010] [Patent Document]

[0011] (Patent Document 0001) Korean Patent Publication No. 10-2016-0093679 (August 8, 2016) Summary of the Invention

[0012] One embodiment of the present invention is to provide a lubricating composition for inhibiting clogging, which can inhibit equipment failures such as scaling and clogging caused by leakage of carboxylic acid-based monomers into the lubricating composition and an increase in friction coefficient due to self-polymerization of the monomers.

[0013] Another embodiment of the present invention is directed to providing a lubricating composition for inhibiting clogging, which can prevent the above-mentioned equipment failures to further improve process yield and operating stability.

[0014] In one general aspect, a lubricating composition for inhibiting clogging includes: a base oil and any one selected from a fatty acid and an emulsifier, wherein the lubricating composition forms a single phase when a carboxylic acid-based monomer is introduced relative to the base oil.

[0015] In the lubricating composition for inhibiting clogging according to an exemplary embodiment of the present invention, the fatty acid may be a C15 to C30 unsaturated fatty acid.

[0016] In the lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention, the fatty acid may be included in an amount of 2 wt % to 20 wt % relative to the total lubricating composition.

[0017] In the lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention, the emulsifier may be included in an amount of 0.1 wt % to 15 wt % relative to the total weight of the lubricating composition.

[0018] In the lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention, the lubricating composition for suppressing clogging may include both a fatty acid and an emulsifier.

[0019] In the lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention, the lubricating composition for suppressing clogging may be a single phase within a temperature range of 40°C to 85°C.

[0020] In the lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention, the content of the carboxylic acid group monomer introduced into the lubricating composition for suppressing clogging may be 0.1 wt % to 50 wt %.

[0021] In the lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention, the lubricating composition for suppressing clogging may have a drive friction coefficient of less than 0.3 when a carboxylic acid-based monomer is introduced.

[0022] In the lubricating composition for suppressing clogging according to the exemplary embodiment of the present invention, the lubricating composition for suppressing clogging may suppress clogging of the discharge portion at 30 N or more at 55°C.

[0023] In another general aspect, a method for suppressing clogging includes injecting the above-described lubricating composition into a discharge portion for discharging the carboxylic acid-based monomer and suppressing self-polymerization of the carboxylic acid-based monomer during preparation of a copolymer derived from the carboxylic acid-based monomer.

[0024] In the method for suppressing clogging according to the present invention, an injection rate of the lubricating composition for suppressing clogging into the discharge portion may be 2 kg / hour to 50 kg / hour.

[0025] In the method of suppressing clogging according to the present invention, the temperature in the discharge part may be 20° C. to 85° C., and the discharge pressure of the discharge part may be 1000 bar to 3000 bar.

[0026] Other features and aspects will become apparent from the following detailed description, drawings, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A and Figure 1 B is a schematic diagram illustrating a clogging suppression principle of a lubricating composition according to an exemplary embodiment of the present invention.

[0028] Figure 2 Actual images of the disk and ball of the tribology measurement device. DETAILED DESCRIPTION

[0029] Hereinafter, the present invention will be described in more detail with reference to specific examples and exemplary embodiments including the accompanying drawings. However, the following specific examples or exemplary embodiments are only used as references for describing the present invention in detail, and the present invention is not limited thereto and can be implemented in various forms.

[0030] In addition, unless otherwise defined, all technical terms and scientific terms have the same meaning as commonly understood by those skilled in the art to which the present invention belongs. The terms used herein are only used to effectively describe a specific example and are not intended to limit the present invention.

[0031] Furthermore, unless the context indicates otherwise, singular forms used in the specification and the appended claims are intended to include the plural forms as well.

[0032] In addition, unless specifically described to the contrary, “comprising” any elements will be understood to imply the further inclusion of other elements rather than the exclusion of any other elements.

[0033] The term "(meth)acrylic acid" used in the present invention is a term including both "methacrylic acid" and "acrylic acid".

[0034] To achieve the above object, the present invention provides a lubricating composition for inhibiting clogging and a method for inhibiting clogging using the composition.

[0035] The present inventors have conducted extensive research into a lubricating composition that, in the process of producing a copolymer derived from a carboxylic acid-based monomer, suppresses clogging or scaling caused by monomer leakage into the lubricating oil in a high-pressure pump that injects the monomer, thereby preventing equipment failures such as clogging of the high-pressure pump. Consequently, the present inventors have demonstrated that, by preparing a lubricating composition comprising a base oil and any one selected from a fatty acid and an emulsifier, a single phase can be formed, even in the event of leakage of the carboxylic acid-based monomer from a discharge portion or introduction during the above process, and that the friction coefficient can be reduced to achieve the above-mentioned effects, thereby completing the present invention.

[0036] Hereinafter, the lubricating composition for suppressing clogging according to the present invention will be described in detail.

[0037] The lubricating composition for inhibiting clogging according to the present invention comprises a base oil and any one selected from a fatty acid and an emulsifier, wherein the lubricating composition maintains a single phase when a carboxylic acid-based monomer is introduced into the lubricating composition relative to the base oil.

[0038] The base oil may be included as a base solvent, diluent, or medium for the lubricating composition. The type of base oil is not particularly limited, and lubricating oils used in polymerization equipment, petrochemical equipment, etc. may be used. For example, any one selected from mineral oil, polyα-olefin (PAO), alkylbenzene, alkylnaphthalene, polyethylene ether, polyalkylene glycol, polycarbonate, polyol ester, ethylene-α-olefin copolymer, polybutene, polyethylene glycol, aromatic ester, hindered ester, dibasic ester, paraffin-based mineral oil, naphthenic mineral oil, or a mixture thereof may be used.

[0039] As fatty acids, C15 to C30 unsaturated fatty acids can be used, and as specific examples, any one or a mixture of two or more selected from myristoleic acid, palmitoleic acid, oleic acid, linoleic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), etc. can be used, but the present invention is not limited thereto.

[0040] The lubricating composition according to a preferred exemplary embodiment may include a base oil and a fatty acid, wherein the fatty acid is present in an amount of 2 to 20 wt %, specifically 3 to 15 wt %, and more specifically 5 to 10 wt %, relative to the total weight of the lubricating composition. Within this content range, even when a carboxylic acid-based monomer is introduced into the lubricating composition, phase separation does not occur, the composition has excellent miscibility of a single phase, and an increase in the friction coefficient due to the introduction of the carboxylic acid-based monomer is reduced, thereby suppressing the accumulation of leaked carboxylic acid-based monomer in specific areas and the self-polymerization of the carboxylic acid-based monomer under high temperature and high pressure conditions to prevent clogging, which is therefore preferred.

[0041] The emulsifier may be a nonionic surfactant, an anionic surfactant, or a cationic surfactant, and known emulsifiers may be used without limitation. Preferably, a polymeric surfactant may be used, and specifically, one or a mixture of two or more selected from a cationic polymer having a polyethyleneimine group and a phosphonate group and a polyolefin-based polymer having a polyisobutylene succinimide (PIBSI) group may be used. As the cationic polymer having a polyethyleneimine group and a phosphonate group, Thermoflo 7049 available from Suez may be preferably used, and as the polyolefin-based polymer having a polyisobutylene succinimide group, Prochem 3F18 available from Suez may be preferably used.

[0042] The lubricating composition according to a preferred exemplary embodiment may include a base oil and an emulsifier, wherein the emulsifier is present in an amount of 0.1 to 15 wt %, specifically 1 to 15 wt %, relative to the total weight of the lubricating composition. Within this content range, when a carboxylic acid-based monomer is introduced in an amount of 0.1 to 50 wt %, specifically 0.1 to 30 wt %, relative to the base oil, phase separation does not occur, a single-phase emulsion with excellent miscibility is formed, and an increase in the friction coefficient due to the introduction of the carboxylic acid-based monomer is reduced, thereby suppressing the accumulation of leaked carboxylic acid-based monomer in specific areas and the self-polymerization of the carboxylic acid-based monomer under high temperature and high pressure conditions to prevent clogging, which is therefore preferred.

[0043] As a non-limiting exemplary embodiment, a lubricating composition for suppressing clogging may include both a fatty acid and an emulsifier, wherein the fatty acid content may be 1% to 15% by weight, and the emulsifier content may be 0.1% to 15% by weight relative to the total lubricating composition. Within this content range, when a carboxylic acid-based monomer is introduced at a content of 1% to 30% by weight relative to the base oil, phase separation does not occur, a single-phase emulsion with excellent miscibility is formed, and the accumulation of leaked carboxylic acid-based monomer in specific areas is prevented, thereby suppressing the self-polymerization of the carboxylic acid-based monomer under high temperature and high pressure conditions to prevent clogging, which is therefore preferred.

[0044] The lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention may have a single phase within a temperature range of 20° C. to 85° C., specifically, at a temperature of 50° C. or higher, more specifically, at a temperature of 70° C. or higher, and even more specifically, at a temperature of 75° C. or higher. Here, the single phase may refer to a uniform one phase without separation into two or more phases.

[0045] More specifically, in the case of conventional lubricating compositions, such as Figure 1 As shown in FIG, when the acrylic acid monomer leaks and causes phase separation, self-polymerization of the acrylic acid monomer due to friction energy occurs to form polyacrylic acid (PAA), resulting in clogging, scaling, etc. However, the lubricating composition according to the exemplary embodiment of the present invention forms a continuous single phase, even in the case of acrylic acid monomers such as Figure 1 In the case of leakage shown in B, there is no phase separation, thereby suppressing the generation and accumulation of polyacrylic acid (PAA) in specific areas of the equipment in a process under high temperature and high pressure conditions to suppress the occurrence of clogging, scaling, etc., which is therefore preferred.

[0046] The content of leaked carboxylic acid-based monomers in the present invention may refer to the content leaked during the process, and specifically, for example, may be greater than 0% by weight, or 0.01% by weight to 30% by weight, but is not limited thereto. The lubricating composition for suppressing clogging according to the exemplary embodiment may have a friction coefficient of less than 0.36, specifically less than 0.3, more specifically less than 0.28, and even more specifically less than 0.25 when the carboxylic acid-based monomers are introduced, but the present invention is not limited thereto.

[0047] The lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention may have a driving friction coefficient (MTM test) measured at 55° C. under a ground contact load of 30 N between the ball / disc and less than 0.4, and a driving friction coefficient (MTM test) measured at 55° C. under a ground contact load of 60 N between the ball / disc and less than 0.3, specifically, 0.28 or less, more specifically, 0.26 or less.

[0048] The lubricating composition for suppressing clogging according to the exemplary embodiment of the present invention may suppress clogging in a discharge portion at 55° C. under a ground contact load of 30 N or more, wherein the discharge portion may refer to a discharge portion described below.

[0049] The lubricating composition for suppressing clogging according to the present invention has the effect of suppressing the occurrence of problems such as blockage, clogging, and scaling caused by friction-accelerated self-polymerization with a friction coefficient of 0.3 or more occurring in the piston or packing part of the pump, when the carboxylic acid-based monomer leaked in a high-pressure pump, cylinder, etc. exists as a separated phase without mixing with the lubricating oil phase in the discharge part during the preparation of a copolymer derived from a carboxylic acid-based monomer.

[0050] Therefore, the present invention also provides a clogging inhibitor comprising a base oil and any one or two selected from a fatty acid and an emulsifier.

[0051] Hereinafter, a method of suppressing clogging using the lubricating composition for suppressing clogging according to the present invention will be described.

[0052] The method for suppressing clogging according to an exemplary embodiment of the present invention includes injecting the above lubricating composition into a discharge portion for discharging the carboxylic acid-based monomer and suppressing self-polymerization of the carboxylic acid-based monomer during preparation of a copolymer derived from the carboxylic acid-based monomer.

[0053] The copolymer derived from a carboxylic acid-based monomer may specifically refer to a copolymer derived from an olefin and a carboxylic acid-based monomer. The olefin monomer may be any one or more selected from ethylene, propylene, butene, etc., but is not limited thereto.

[0054] The carboxylic acid-based monomer may include an unsaturated carboxylic acid capable of undergoing a chain polymerization reaction, and as a specific example, may be any one or more selected from (meth)acrylic acid, esters thereof, etc. In particular, preferably, the copolymer may be an ethylene-acrylic acid copolymer, and the lubricating composition for inhibiting clogging of the present invention may be preferably applied to a process for preparing an ethylene-acrylic acid copolymer, but the present invention is not limited thereto.

[0055] The discharge portion in the process of preparing a copolymer derived from a carboxylic acid-based monomer may include a piston and a packing portion, and the carboxylic acid-based monomer supplied through the discharge flow path may be pumped or ejected by the reciprocating motion of the piston in the packing portion. The packing portion may be a sealing member, such as a bushing or a cylinder. When the carboxylic acid-based monomer leaks into a gap between the piston and the packing portion, etc. in the packing portion, the carboxylic acid-based monomer may accumulate locally, and friction between the piston and the packing portion may repeatedly occur in the gap. As a result, the carboxylic acid-based monomer self-polymerizes to form a self-polymer such as polyacrylic acid (PAA), thereby causing scaling, clogging, etc.

[0056] The lubricating composition for suppressing clogging according to an exemplary embodiment of the present invention is injected into the above-mentioned discharge part, thereby having excellent miscibility to form a single phase even when the carboxylic acid group monomer leaks, thereby suppressing the local concentration increase and self-polymerization of the carboxylic acid group monomer to suppress clogging, scaling, etc.

[0057] Here, the lubricating composition for suppressing clogging may be injected into the discharge portion at a rate of 2 to 50 kg / hour, a temperature of the discharge portion may be 20 to 85° C., and a discharge pressure of the discharge portion may be 1000 to 3000 bar, but are not limited thereto.

[0058] The lubricating composition for inhibiting clogging according to the present invention inhibits unnecessary or uninitiated polymerization reactions during the formation of a copolymer derived from a carboxylic acid-based monomer, thereby inhibiting the occurrence of clogging, flow blockage, scaling, plugging, etc. of the above-mentioned equipment such as pumps, compressors, and flow paths, thereby reducing equipment failures and improving production process efficiency.

[0059] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the following Examples and Comparative Examples are merely examples for describing the present invention in more detail, and do not limit the present invention in any way.

[0060] [Experimental methods]

[0061] 1. Micro Tractor Machine (MTM) Test

[0062] Acrylic acid (AA) (purity 99%, produced by Sigma Aldrich) was mixed with the prepared lubricating composition to prepare a sample solution. At this time, the polymerization inhibitor previously contained in the acrylic acid was removed by distillation to exclude the possibility that the polymerization inhibitor would generate a self-polymerization inhibitor. Figure 2 The friction measurement device (Micro Traction Tester (MTM) 2) shown here observes the presence of self-polymerization in a prepared sample solution while rotating a disk and ball. The sample solution and the ball are supplied to the disk through an inlet at an initial temperature of 55°C. The disk and ball are then brought into contact with the sample solution while rotating them together. The presence of self-polymerization is observed by varying the load between the disk and ball, as well as the sliding-rolling ratio (SRR) between the ball and disk.

[0063] [Example 1]

[0064] 67.9 g of HYPERCOMP-1000 (produced by SK New Technology Co., Ltd.) as a base oil was mixed with 2.1 g of oleic acid in a 100 ml container using a magnetic bar at room temperature for 30 minutes or more to prepare a lubricating composition having an oleic acid content of 3 wt%.

[0065] [Example 2]

[0066] A lubricating composition was prepared in the same manner as in Example 1, except that 63.7 g of the base oil was mixed with 6.3 g of oleic acid so that the oleic acid content was 9 wt %.

[0067] [Example 3]

[0068] 68.32 g of HYPERCOMP-1000 (produced by SK New Technology Co., Ltd.) as a base oil and 1.68 g of an emulsifier (Thermoflo 7049 available from Suez) were mixed in a 100 ml container using a magnetic bar at room temperature for more than 30 minutes to prepare a lubricating composition having an emulsifier content of 2.4 wt%.

[0069] [Example 4]

[0070] A lubricating composition was prepared in the same manner as in Example 3, except that 64.82 grams of the base oil was mixed with 5.18 grams of an emulsifier (Thermoflo 7049 available from Suez) so that the emulsifier content was 7.4% by weight.

[0071] [Example 5]

[0072] 67.2 g of HYPERCOMP-1000 (manufactured by SK New Technology Co., Ltd.) as a base oil was mixed with 2.1 g of oleic acid and 0.7 g of an emulsifier (Thermoflo 7049 available from Suez) in a 100 ml container at room temperature for 30 minutes or more using a magnetic bar to prepare a lubricating composition having an oleic acid content of 3% by weight and an emulsifier content of 1% by weight.

[0073] [Comparative Example 1]

[0074] HYPERCOMP-1000 (produced by SK New Technology Co., Ltd.) was used alone as the base oil.

[0075] The lubricating compositions prepared in Examples 1 to 5 and Comparative Example 1 were used to evaluate the following properties.

[0076] [Experimental Example 1] Phase separation characteristics depending on the temperature and acrylic acid content of the lubricating composition

[0077] The lubricating compositions prepared in Examples 1 to 5 were mixed with 30 grams of acrylic acid, and the phase separation characteristics are shown in Table 1 below.

[0078] Furthermore, compositions obtained by mixing the lubricating compositions prepared in Examples 1 and 2 with 17.5 g of acrylic acid were designated as Examples 6 and 7, respectively, and their phase separation characteristics are also shown in Table 1 below.

[0079] [Table 1]

[0080]

[0081] [Experimental Example 2] MTM Test Evaluation of Lubricating Composition

[0082] As shown in Table 2 below, the lubricating compositions containing acrylic acid of Examples 1 to 7 and Comparative Example 1 were evaluated by the MTM test, and the results are shown in Table 2.

[0083] Here, Hypercomp 1000 (produced by SK New Technology Co., Ltd.), a base oil not mixed with acrylic acid, was used as a control group.

[0084] [Table 2]

[0085]

[0086] As shown in Table 2, the control group, which omitted acrylic acid and used a base oil alone, maintained a friction coefficient of 0.1, but the inclusion of acrylic acid increased the friction coefficient. The examples containing oleic acid and / or an emulsifier exhibited lower friction coefficients compared to Comparative Example 1, with a particularly significant reduction under harsh conditions of higher loads at the same temperature. Furthermore, Examples 6 and 7, which contained lower acrylic acid contents, exhibited lower friction coefficients compared to Examples 1 to 5, which contained higher acrylic acid contents. This suggests that despite the inclusion of acrylic acid in the lubricating composition, a rapid increase in the friction coefficient was suppressed, thereby inhibiting the occurrence of clogging caused by acrylic acid self-polymerization in specific areas. Furthermore, when the amount of acrylic acid introduced was low, the friction coefficient decreased and the compatibility was sufficiently stable, resulting in improved lubrication performance comparable to that of the control group and further suppression of PAA formation.

[0087] More specifically, as shown in Tables 1 and 2, when acrylic acid and the base oil have excellent miscibility as a single phase, clogging caused by the production of polyacrylic acid (PAA), a self-polymer of acrylic acid, was suppressed and delayed under conditions of 55°C and 30N or higher. Furthermore, when a single emulsion phase was formed using an emulsifier, as shown in Examples 3 and 4, less polyacrylic acid (PAA) was produced.

[0088] Furthermore, as shown in Table 2, in Example 2, which included a base oil and sufficient oleic acid, it was confirmed that excellent lubrication was achieved without generating PAA even under severe conditions up to 60 N, and in Examples 3 and 4, which included an emulsifier, it was confirmed that excellent lubrication was achieved without generating PAA even under severe conditions up to 75 N. In contrast, in Comparative Example 1, which used only a base oil, it was confirmed that, when acrylic acid was included, PAA was easily generated and clogging occurred, and therefore, measurement in the MTM test was impossible.

[0089] The lubricating composition for suppressing clogging according to the present invention suppresses an increase in the friction coefficient due to leakage of the carboxylic acid-based monomer into the lubricating composition and improves miscibility to achieve an effect as an excellent lubricating composition, and also reduces the friction coefficient and suppresses the acceleration of self-polymerization due to leakage of the carboxylic acid-based monomer and increase in friction in specific areas to suppress and delay the self-polymerization of the carboxylic acid-based monomer, thereby significantly suppressing the occurrence of clogging, scaling, etc.

[0090] Furthermore, the lubricating composition for inhibiting clogging according to the present invention is applied to a process of forming a copolymer derived from a carboxylic acid-based monomer to inhibit unnecessary polymerization of the carboxylic acid-based monomer or uninitiated polymerization of the carboxylic acid-based monomer due to leakage of the carboxylic acid-based monomer into the lubricating composition, thereby inhibiting clogging, blockage, scaling, and the like of the above-mentioned equipment such as pumps, compressors, and flow paths, thereby reducing equipment failures and improving production process efficiency.

[0091] Although the present invention has been described above through specific content, limited exemplary embodiments and drawings, they are provided only to help the overall understanding of the present invention. The present invention is not limited to the exemplary embodiments, and those skilled in the art to which the present invention belongs can make various modifications and changes based on the description.

[0092] Therefore, the spirit of the present invention should not be limited to the above-described exemplary embodiments, and all modifications as defined in the appended claims and equivalents to the claims are intended to fall within the scope and spirit of the present invention.

Claims

1. A lubricating composition for inhibiting clogging, comprising: Base oil; and C15 to C30 unsaturated fatty acid and an emulsifier, wherein the content of the fatty acid is 2 wt% to 20 wt% relative to the total weight of the lubricating composition, and the content of the emulsifier is 0.1 wt% to 15 wt%, wherein the emulsifier is selected from one or a mixture of two of a cationic polymer having a polyethyleneimine group and a phosphonate group and a polyolefin-based polymer having a polyisobutylene succinimide group, wherein when a carboxylic acid-based monomer is introduced relative to the base oil, the lubricating composition forms a single phase within a temperature range of 20°C to 85°C. 2 . The lubricating composition for inhibiting clogging according to claim 1 , wherein the lubricating composition for inhibiting clogging forms a single phase in a temperature range of 40° C. to 85° C. 3 . The lubricating composition for inhibiting clogging according to claim 1 , wherein the content of the carboxylic acid-based monomer introduced into the lubricating composition for inhibiting clogging is 0.1% to 50% by weight. 4 . The lubricating composition for inhibiting clogging according to claim 1 , wherein a driving friction coefficient of the lubricating composition for inhibiting clogging is less than 0.3 when the carboxylic acid-based monomer is introduced. 5 . The lubricating composition for suppressing clogging according to claim 1 , wherein the lubricating composition for suppressing clogging suppresses clogging in a discharge portion at 30 N or more at 55° C.

6. A method for inhibiting clogging, the method comprising: In the process of preparing a copolymer derived from a carboxylic acid-based monomer, the lubricating composition according to any one of claims 1 to 5 is injected into a discharge portion from which the carboxylic acid-based monomer is discharged and suppresses self-polymerization of the carboxylic acid-based monomer. 7 . The method for suppressing clogging according to claim 6 , wherein a rate of injection of the lubricating composition for suppressing clogging into the discharge portion is 2 kg / hour to 50 kg / hour. 8 . The method for suppressing clogging according to claim 7 , wherein a temperature in the discharge portion is 20° C. to 85° C., and a discharge pressure of the discharge portion is 1000 bar to 3000 bar.

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