Title of the invention: Binder composition and electrode mixture for secondary battery electrodes Technical field [One] Cross-reference with related application(s) [2] This application claims the benefit of priority based on Korean Patent Application No. 10-2018-0136197 filed on November 7, 2018, and all contents disclosed in the literature of the Korean patent applications are incorporated as part of this specification. [3] The present invention relates to a binder composition for secondary battery electrodes and an electrode mixture comprising the same. Background [4] Due to the rapid increase in the use of fossil fuels, the demand for the use of alternative energy or clean energy is increasing, and as a part of this, the field that is most actively studied is the field of secondary batteries using electrochemistry. [5] In recent years, as technology development and demand for portable devices such as portable computers, portable telephones, and cameras increase, the demand for secondary batteries as an energy source is rapidly increasing. Among these secondary batteries, they have high energy density and operating potential, A lot of research has been conducted on a lithium secondary battery having a long cycle life and a low self-discharge rate, and has been commercialized and widely used. [6] In addition, as interest in environmental issues increases, research on electric vehicles or hybrid vehicles that can replace fossil fuel engines, one of the main causes of air pollution, is being conducted. It is also used as a power source for automobiles. [7] In a lithium secondary battery, in general, lithium transition metal oxide is used as a positive electrode active material, and a graphite-based material is used as a negative electrode active material. The electrode of a lithium secondary battery is manufactured by mixing such an active material and a binder component, dispersing it in a solvent to form a slurry, and then applying it to the surface of a current collector to form a mixture layer. [8] In general, a lithium secondary battery undergoes charging and discharging while repeating the process of inserting and desorbing lithium ions from the positive electrode into the negative electrode, and in this repeating process, the bond between the electrode active material or the conductive material becomes loose, and the contact resistance between particles As this increases, the self-resistance of the electrode may also increase. [9] Accordingly, the binder used for the electrode must be able to maintain excellent binding force between the electrode active material and the current collector, and also be capable of buffering the expansion and contraction of the electrode active material due to insertion and desorption of lithium ions from the electrode. [10] In particular, in recent years, in order to increase the discharge capacity of the electrode, natural graphite having a theoretical discharge capacity of 372 mAh/g and a material such as silicon, tin, and silicon-tin alloy having a large discharge capacity are often used in combination. Accordingly, as charging and discharging are repeated, the volume expansion rate of the material increases remarkably, resulting in the separation of the negative electrode material, and as a result, the capacity of the battery rapidly decreases and the lifespan is shortened. [11] In addition, lithium ion batteries may swell due to gas generated during the decomposition of the electrolyte inside the battery, and a swelling phenomenon may occur. When the temperature of the battery increases according to the use of electronic products, the decomposition of the electrolyte is accelerated. The ring phenomenon may be accelerated and the stability of the battery may be deteriorated. [12] Therefore, studies on binders and electrode materials that can achieve excellent bonding strength to the extent that it can prevent separation between electrode active materials or between electrode active materials and current collectors and maintain structural stability of the electrode even in repeated charge/discharge cycles have been conducted. It is an urgent need. Detailed description of the invention Technical challenge [13] An object of the present invention is to provide a binder composition for a secondary battery electrode, which is excellent in latex stability and at the same time, capable of imparting excellent binding force to an active material and an electrode. [14] In addition, the present invention is to provide a method of manufacturing the binder composition for secondary battery electrodes. [15] In addition, the present invention is to provide a secondary battery electrode mixture comprising the binder for secondary battery electrodes. [16] In addition, the present invention is to provide a secondary battery electrode including the secondary battery electrode mixture. [17] In addition, the present invention is to provide a secondary battery including the secondary battery electrode. Means of solving the task [18] In order to solve the above problems, the present invention, [19] a) a first repeating unit derived from an aliphatic conjugated diene-based first monomer; [20] 1 selected from the group consisting of b1) aromatic vinyl monomers, b2) alkyl (meth)acrylic acid ester monomers, b3) (meth)acrylamide monomers, b4) alkenyl cyanide monomers, and b5) unsaturated carboxylic acid monomers A second repeating unit derived from a second or more species of monomer; And [21] c) containing a third repeating unit derived from a third monomer represented by the following formula (1), [22] The third repeating unit is contained in an amount of 0.5 to 0.95% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit, [23] Comprising a copolymer, [24] To provide a binder composition for secondary battery electrodes: [25] [Formula 1] [26] [27] In Formula 1, [28] M is an alkali metal, [29] X is hydrogen or a methyl group, [30] Y is an alkylene having 1 to 10 carbon atoms, [31] Z is an oxygen atom, or NR, where R is hydrogen or an alkyl group having 1 to 10 carbon atoms. [32] The present invention also provides a method of manufacturing the binder for secondary battery electrodes. [33] The present invention also provides a secondary battery electrode mixture comprising the binder for secondary battery electrodes and an electrode active material. [34] The present invention also provides an electrode mixture layer including the secondary battery electrode mixture and a secondary battery electrode including an electrode current collector. [35] The present invention also provides a secondary battery including the secondary battery electrode. Effects of the Invention [36] The binder composition for a secondary battery electrode according to the present invention has excellent latex stability and at the same time can impart an excellent binding force to an active material and an electrode, thereby improving performance of a secondary battery using the same. Mode for carrying out the invention [37] In the present invention, terms such as first and second are used to describe various components, and the terms are used only for the purpose of distinguishing one component from other components. [38] In addition, terms used in the present specification are only used to describe exemplary embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprises", "includes" or "have" are intended to designate the presence of implemented features, numbers, steps, components, or a combination thereof, and one or more other features or It is to be understood that the possibility of the presence or addition of numbers, steps, elements, or combinations thereof is not preliminarily excluded. [39] In addition, in the present invention, when each layer or element is referred to as being formed “on” or “on” each layer or element, it means that each layer or element is formed directly on each layer or element, or It means that a layer or element may be additionally formed between each layer, on an object, or on a substrate. [40] The present invention will be described in detail below and exemplifying specific embodiments, which can be made various changes and have various forms. However, this is not intended to limit the present invention to a specific form disclosed, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. [41] (Binder for secondary battery electrode) [42] The binder composition for a secondary battery electrode according to an embodiment of the present invention, [43] a) a first repeating unit derived from an aliphatic conjugated diene-based first monomer; [44] 1 selected from the group consisting of b1) aromatic vinyl monomers, b2) alkyl (meth)acrylic acid ester monomers, b3) (meth)acrylamide monomers, b4) alkenyl cyanide monomers, and b5) unsaturated carboxylic acid monomers A second repeating unit derived from a second or more species of monomer; And [45] c) comprising a copolymer comprising a third repeating unit derived from a third monomer represented by the following formula (1), [46] In this case, the third repeating unit in the copolymer is included in an amount of 0.5 to 0.95% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit: [47] [Formula 1] [48] [49] In Formula 1, [50] M is an alkali metal, [51] X is hydrogen or a methyl group, [52] Y is an alkylene having 1 to 10 carbon atoms, [53] Z is an oxygen atom, or NR, where R is hydrogen or an alkyl group having 1 to 10 carbon atoms. [54] The binder composition for a secondary battery electrode according to an embodiment of the present invention includes a first repeating unit derived from an aliphatic conjugated diene-based first monomer and a second repeating unit derived from the second monomer described above, and the above formula having a specific structure. And a copolymer including a third repeating unit derived from a third monomer represented by 1, specifically a third repeating unit derived from a monomer having a hydroxypropyl sulfonate group at the terminal. [55] The copolymer including the third repeating unit derived from the third monomer having a hydroxypropyl sulfonate group at the terminal may enhance the binding force between the electrode active material and/or between the active material and the current collector due to the hydroxy group and the sulfonate group. . More specifically, since the hydroxy group and the sulfonate group located at the side chain or terminal of the copolymer can form a chemical bond with the metal surface of the electrode current collector, when the copolymer containing the third repeating unit is used as a binder, The binding force to the electrode mixture layer and the electrode current collector may be improved. [56] In addition, when the copolymer is prepared by emulsion polymerization, since the third monomer represented by Formula 1 directly participates in the polymerization reaction including the alkenyl group in the molecule, it is possible to impart stability to the particle surface, and thus the final generation The mechanical stability of the resulting copolymer can be improved. [57] In addition, the third repeating unit is included in an amount of 0.5 to 0.95% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit. In the present invention, the meaning of'the third repeating unit is included in an amount of 0.5 to 0.95% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit' means, the copolymer Is prepared by emulsion polymerization of the first monomer, the second monomer, and the third monomer, wherein the third monomer is 0.5 to 0.95 weight based on the total content of the first, second and third monomers described above. Means used as %. When the third repeating unit is contained in an amount of less than 0.5% by weight in the copolymer, the effect of improving the stability according to the third repeating unit may be insignificant or absent. Alternatively, the adhesion of the mixture layer including the same to the electrode current collector may be lowered. [58] Hereinafter, a binder composition for a secondary battery electrode according to an embodiment of the present invention will be described in more detail for each repeating unit. [59] The first repeating unit according to the present invention is derived from an aliphatic conjugated diene-based first monomer. Specifically, the first repeating unit is a structural unit of a copolymer formed by introducing an aliphatic conjugated diene-based monomer during polymerization, and when the first repeating unit derived from such an aliphatic conjugated diene-based monomer is included in the copolymer, the present invention The resulting binder can suppress the swelling of the electrolyte at high temperatures and has elasticity due to the rubber component, thereby reducing the thickness of the electrode, reducing the gas generation phenomenon, and binding force between the electrode active material and the current collector. It can also play a role of improving adhesion so that it can be maintained. [60] As the first monomer that is the aliphatic conjugated diene-based monomer, an aliphatic conjugated diene-based compound having 2 to 20 carbon atoms may be used. As a non-limiting example, the first aliphatic conjugated diene monomer is 1,3-butadiene, 2-methyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 1,2-dimethyl-1 3-butadiene, 1,4-dimethyl-1,3-butadiene, 1-ethyl-1,3-butadiene, 2-phenyl-1,3-butadiene, 1,3-pentadiene, 1,4-pentadiene, 3-methyl-1,3-pentadiene, 4-methyl-1,3-pentadiene, 2,4-dimethyl-1,3-pentadiene, 3-ethyl-1,3-pentadiene, 1,3- Hexadiene, 1,4-hexadiene, 1,5-hexadiene, 2-methyl-1,5-hexadiene, 1,6-heptadiene, 6-methyl-1,5-heptadiene, 1,6- It may be one or more selected from the group consisting of octadiene, 1,7-octadiene, and 7-methyl-1,6-octadiene. Preferably, 1,3-butadiene may be used as the first aliphatic conjugated diene-based monomer. [61] The first repeating unit may be included in an amount of 0.1 to 60% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit. That is, when preparing the copolymer, the first monomer may be used in an amount of 0.1 to 60% by weight based on the total content of the first monomer, the second monomer, and the third monomer. For example, the first repeating unit is 10% by weight or more, 15% by weight or more, 20% by weight or more, or 30% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit. % Or more, 58% by weight or less, 55% by weight or less, 53% by weight or less, or 50% by weight or less. When the first repeating unit is contained in an amount exceeding 60% by weight in the copolymer, there may be a problem in that the strength of the binder decreases or the yield of the reactant decreases. [62] In addition, the second repeating unit according to the present invention is b1) an aromatic vinyl monomer, b2) an alkyl (meth)acrylic acid ester monomer, b3) a (meth)acrylamide monomer, b4) an alkenyl cyanide monomer, and b5) It is derived from one or more, preferably three or more, second monomers selected from the group consisting of unsaturated carboxylic acid-based monomers. Specifically, the second repeating unit corresponds to a structural unit of a copolymer formed by introducing the above-described second monomer during polymerization. [63] The aromatic vinyl monomer is composed of styrene, α-methylstyrene, β-methylstyrene, pt-butylstyrene, chlorostyrene, vinylbenzoic acid, methyl vinylbenzoate, vinylnaphthalene, chloromethylstyrene, hydroxymethylstyrene, and divinylbenzene. It may be one or more selected from the group, preferably, it may be styrene. [64] And, the alkyl (meth) acrylate monomer, methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, n-amyl acrylate, isoamyl acrylic Rate, n-ethylhexyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-amyl methacrylate, isoamyl methacrylate, n-hexyl methacrylate, n-ethylhexyl methacrylate, 2-ethylhexyl methacrylate, lauryl acrylate, ceryl acrylate, stearyl acrylate, It may be one or more selected from the group consisting of lauryl methacrylate, cetyl methacrylate, and stearyl methacrylate, and preferably, methyl methacrylate. [65] In addition, the (meth)acrylamide-based monomer is acrylamide, n-methylol acrylamide, n-butoxymethyl acrylamide, methacrylamide, n-methylol methacrylamide, n-butoxymethyl methacrylamide It may be one or more selected from the group consisting of. [66] In addition, the alkenyl cyanide monomer is a monomer containing both an ethylenically unsaturated group and a nitrile group in a molecule, and examples thereof include acrylonitrile, methacrylonitrile, allyl cyanide, and the like. [67] In addition, the unsaturated carboxylic acid-based monomer may be at least one selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, fumaric acid, glutaric acid, itaconic acid, tetrahydrophthalic acid, crotonic acid, isocrotonic acid, and nadic acid. have. [68] Specifically, as the second monomer, three or more selected from the group consisting of b1) an aromatic vinyl monomer, b2) an alkyl (meth)acrylic acid ester monomer, and b5) an unsaturated carboxylic acid monomer may be used. Preferably, b1) styrene, b2) methyl methacrylate, and b5) acrylic acid and itaconic acid may be used as the second monomer. [69] The second repeating unit may be included in an amount of 39 to 99.4% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit. That is, when preparing the copolymer, the second monomer may be used in an amount of 39 to 99.4% by weight based on the total content of the first monomer, the second monomer, and the third monomer. For example, the second repeating unit is 41% by weight or more, 44% by weight or more, 46% by weight or more, or 49% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit. % Or more, 89.5% by weight or less, 84.5% by weight or less, 79.5% by weight or less, or 69.5% by weight or less. When the second repeating unit is contained in an amount of less than 39% by weight in the copolymer, there may be a problem in that the strength of the binder decreases or affinity with the electrolyte solution decreases. [70] In addition, the third repeating unit according to the present invention is derived from the third monomer represented by Chemical Formula 1. Specifically, the third repeating unit is a structural unit of a copolymer formed by injecting a monomer represented by Formula 1 during polymerization, and when the copolymer according to the present invention contains the third repeating unit at a specific level, As described above, the polymerization stability during the polymerization process may be improved, and the adhesion of the mixture layer including the mixture layer to the electrode may be improved. [71] Preferably, in Formula 1, Y is methylene, and Z is an oxygen atom. [72] For example, the monomer represented by Formula 1 is sodium 3-allyloxy-2-hydroxypropyl sulfonate represented by Formula 1-1: [73] [Formula 1-1] [74] [75] Meanwhile, the copolymer according to the present invention has the form of latex particles manufactured through emulsion polymerization. Specifically, the copolymer may be latex particles having an average particle diameter of 40 nm to 500 nm. The average particle diameter of the latex particles may be measured using a particle size analyzer (NICOMP AW380, manufactured by PSS) using a dynamic light scattering method. [76] Specifically, in the present specification, the average particle diameter refers to the arithmetic average particle diameter in the particle size distribution measured by dynamic light scattering, where the arithmetic average particle diameter is the scattering intensity (Intensity distribution) average particle diameter, volume ( Volume distribution) can be measured by the average particle diameter or the number distribution average particle diameter, of which it is preferable to measure the scattering intensity by the average particle diameter. [77] For example, the copolymer may be a latex particle having an average particle diameter of 40 nm or more, or 70 nm or more, or 100 nm or more, 500 nm or less, or 400 nm or less, or 300 nm or less, or 200 nm or less. have. If the average particle diameter of the latex particles is too small, the stability of the latex particles may be deteriorated. Conversely, if the average particle diameter of the latex particles is too large, the adhesion of the mixture layer including the latex particles to the current collector may be weakened. Therefore, from this point of view, the copolymer is preferably a latex particle having an average particle diameter in the above-described range. [78] In addition, the copolymer may have a gel content of 95% or more calculated by the following Equation 1: [79] [Equation 1] [80] [81] In Equation 1, [82] M a is the weight measured after drying the copolymer sample at 80 degrees for 24 hours, [83] M b is that the weight-measured copolymer is immersed in 50 g of THF (Tetrahydrofuran) for more than 24 hours, filtered through 200 mesh, and then the mesh and the copolymer remaining in the mesh are dried together at 80 degrees for 24 hours, and then added to the mesh. It is the weight of the remaining copolymer. [84] The gel content of the copolymer refers to the degree of crosslinking of the copolymer, and is calculated as in Equation 1 and expressed as an insoluble fraction in the electrolyte. Preferably, the gel content of the copolymer is 95% to 99%, or 95% to 98%, or 96% to 97.5%, and when the gel content of the copolymer is less than 95%, swelling ( swelling) may increase and the battery life may decrease. [85] In addition, the copolymer in the form of latex particles put 150 g in a container and sheared at 3000 rpm for 10 minutes, and the amount of coagulum measured by filtering through 200 mesh is 200 ppm or less, or 150 ppm or less, or 130 ppm or less. At the same time, the 180-degree peeling strength between the electrode mixture and the current collector prepared by using the copolymer as a binder is 27 g/in or more, or 28 g/in or more, or 30 g/in or more, and 50 g/in or less , Or 48 g/in or less, or 45 g/in or less. [86] In addition, the binder composition for secondary battery electrodes may further include an aqueous solvent in addition to the above-described copolymer, that is, latex particles. [87] At this time, the aqueous solvent may be used in about 50 to about 1,000 parts by weight, preferably about 50 to about 200 parts by weight, based on 100 parts by weight of the copolymer, in terms of stability and viscosity control of the latex particles, For example, based on the total amount of the binder composition, it may be used so that the total solid content (TSC) is adjusted to about 10 to about 60%. [88] If the aqueous solvent is used too little, the stability of the latex particles may be deteriorated, and if the solvent is used too much, the viscosity may be lowered and the adhesive strength of the binder may be weakened. There may be a problem that performance is degraded. [89] Meanwhile, according to another aspect of the present invention, [90] Aliphatic conjugated diene-based first monomer; At least one second monomer selected from the group consisting of an aromatic vinyl monomer, an alkyl (meth)acrylic acid ester monomer, a (meth)acrylamide monomer, an alkenyl cyanide monomer, and an unsaturated carboxylic acid monomer; And emulsion polymerization of the third monomer represented by Formula 1 in the presence of an emulsifier and a polymerization initiator to prepare a copolymer, [91] The third monomer provides a method of manufacturing a binder composition for a secondary battery electrode, comprising the step of using 0.5 to 0.95% by weight based on the total content of the first monomer, the second monomer, and the third monomer. [92] In this case, the description of the first monomer, the second monomer, and the third monomer is as described above. [93] In addition, the emulsion polymerization may be performed by single polymerization or multistage polymerization. Here, single polymerization refers to a method of simultaneously polymerizing the monomers used in a single reactor, and multistage polymerization refers to a method of sequentially polymerizing the used monomers in two or more stages. [94] In addition, the emulsion polymerization may be carried out in the presence of an emulsifier and a polymerization initiator in a solution containing the aqueous solvent described above. [95] The polymerization temperature and polymerization time of emulsion polymerization for preparing the copolymer may be appropriately determined depending on the case. For example, the polymerization temperature may be about 50° C. to about 200° C., and the polymerization time may be about 0.5 hour to about 20 hours. [96] As the polymerization initiator usable in the emulsion polymerization, inorganic or organic peroxides may be used, for example, water-soluble initiators including potassium persulfate, sodium persulfate, ammonium persulfate, and cumene hydroperoxide, benzoyl peroxide, etc. Oil-soluble initiators including oxides and the like can be used. [97] In addition, an activator may be further included to accelerate the reaction initiation of the peroxide together with the polymerization initiator, and such activators include sodium formaldehyde sulfoxylate, sodium ethylenediamine tetraacetate, ferrous sulfate, and dextrose. One or more selected from the group consisting of may be used. [98] In addition, as the emulsifier for the emulsion polymerization, an anionic emulsifier such as sodium dodecyl diphenyl isother disulfonate, sodium lauryl sulfate, sodium dodecyl benzene sulfonate, dioctyl sodium sulfosuccinate, or polyoxyethylene Nonionic emulsifiers such as polyethylene oxide alkyl ether such as lauryl ether, polyethylene oxide alkyl aryl ether, polyethylene oxide alkyl amine, and polyethylene oxide alkyl ester may be used. This emulsifier is a material having a hydrophilic group and a hydrophobic group at the same time, and forms a micelle structure in the emulsion polymerization process, and enables polymerization of each monomer within the micelle structure. Preferably, the anionic emulsifier and the nonionic emulsifier may be used alone or in combination of two or more, and may be more effective when using a mixture of an anionic emulsifier and a nonionic emulsifier, but the present invention is necessarily such emulsifier It is not limited to the type of. [99] And, the emulsifier is, for example, about 0.01 to about 10 parts by weight, about 1 to about 10 parts by weight, or about 3 to about 5 parts by weight, based on a total of 100 parts by weight of the monomer component used in the preparation of the copolymer. Can be used as wealth. [100] (Electrode mixture and electrode) [101] Meanwhile, according to another aspect of the present invention, a secondary battery electrode mixture including the binder for secondary battery electrodes and an electrode active material described above is provided. [102] And, according to another aspect of the present invention, the electrode mixture layer including the secondary battery electrode mixture; And a secondary battery electrode including an electrode current collector is provided. [103] Except for the above-described binder, the electrode mixture of the present invention, the electrode active material, the electrode current collector, etc. used in the electrode may each include generally known components. [104] For example, the electrode mixture may be used to manufacture a negative electrode. That is, the electrode mixture may be a negative electrode mixture, and the electrode active material may be a negative electrode active material. [105] Here, the binder may be included in 1% to 10% by weight, specifically 1% to 5% by weight, based on the total weight (100% by weight) of the negative electrode mixture. When this is satisfied, the content of the negative active material may be relatively increased, and the discharge capacity of the electrode may be further improved. [106] On the other hand, since the binder has excellent properties in terms of binding strength, mechanical properties, etc., even when a graphite-based negative active material is used as the negative active material of the negative electrode mixture, as well as a negative active material having a higher capacity, between the negative active material and the negative active material, It is possible to maintain binding strength between the negative active material and the negative current collector, and to suppress the expansion of the negative active material by its own mechanical properties. [107] As such, the binder is suitable for being applied not only with a graphite-based negative active material but also with a negative active material having a higher capacity, and thus, the type of the negative active material is not particularly limited in one embodiment of the present invention. [108] Specifically, the negative active material includes carbon such as non-graphitized carbon and graphite-based carbon; Li x Fe 2 O 3 (0≤x≤1), Li x WO 2 (0≤x≤1), Sn x Me 1-x Me' y O z (Me: Mn, Fe, Pb, Ge; Me' : Al, B, P, Si, elements of groups 1, 2, and 3 of the periodic table, halogens, metal complex oxides such as 0 [137] Example 1 [138] (1) Preparation of binder [139] Monomers include (a) 1,3-butadiene (44g), (b1) styrene (47.05g), (b2) methyl methacrylate (5g), (b5) acrylic acid and itaconic acid (3g), (c) sodium 3-allyloxy-2-hydroxypropyl sulfonate (0.95 g) was added to water containing sodium lauryl sulfate and polyoxyethylene lauryl ether (1.3 g) as an emulsifier, and NaHCO 3 as a buffer, and 75° C. After heating up to, ammonium persulfate was added as a polymerization initiator to perform single polymerization. A binder composition including a copolymer in the form of latex particles was prepared by reacting for about 8 hours while maintaining a temperature of 75°C. The binder composition of Example 1 thus obtained had a total solid content of 40%, and the average particle diameter of the latex particles measured using a particle size analyzer (NICOMP AW380, manufactured by PSS) was 110 nm. The pH of the polymerization-completed binder composition was adjusted to neutral (pH 7) using sodium hydroxide. [140] (2) Preparation of negative electrode mixture [141] The negative electrode uses water as a dispersion medium and uses natural graphite (96.9g), acetylene black (0.4g), a binder for secondary batteries in the form of latex particles prepared in Example 1 (1.5g), and carboxymethyl Cellulose (1.2g) was mixed, and the total solid content was 50% by weight to prepare a slurry-like negative electrode mixture for negative electrode. [142] (3) Preparation of negative electrode [143] Using a comma coater, the negative electrode mixture of Example 1 was applied to a copper foil to a thickness of 100 micrometers, put in a dry oven at 90° C., dried for 15 minutes, and roll-pressed to a total thickness of 70 μm ( roll-press) to obtain the negative electrode of Example 1. [144] Example 2 [145] (1) Preparation of binder [146] Monomers include (a) 1,3-butadiene (45g), (b1) styrene (46.3g), (b2) methyl methacrylate (5g), (b5) acrylic acid and itaconic acid (3g), (c) sodium Polymerization was carried out in the same manner as in Example 1, except that 3-allyloxy-2-hydroxypropyl sulfonate (0.7 g) was used to prepare a binder composition including a copolymer in the form of latex particles having an average particle diameter of 111 nm. I did. [147] (2) Preparation of negative electrode mixture and negative electrode [148] Using the binder of Example 2 instead of the binder of Example 1, a negative electrode mixture was prepared in the same manner as in Example 1, and the negative electrode of Example 2 was manufactured using the negative electrode mixture. [149] Example 3 [150] (1) Preparation of binder [151] Monomers include (a) 1,3-butadiene (45.2g), (b1) styrene (46.3g), (b2) methyl methacrylate (5g), (b5) acrylic acid and itaconic acid (3g), (c) Polymerization was performed in the same manner as in Example 1, except that sodium 3-allyloxy-2-hydroxypropyl sulfonate (0.5 g) was used, and a binder composition including a latex particle-type copolymer having an average particle diameter of 110 nm was prepared. Was prepared. [152] (2) Preparation of negative electrode mixture and negative electrode [153] Using the binder of Example 3 instead of the binder of Example 1, a negative electrode mixture was prepared in the same manner as in Example 1, and the negative electrode of Example 3 was manufactured using the negative electrode mixture. [154] Example 4 [155] (1) Preparation of binder [156] Monomers include (a) 1,3-butadiene (44g), (b1) styrene (47.05g), (b2) methyl methacrylate (5g), (b5) acrylic acid and itaconic acid (3g), (c) sodium 3-allyloxy-2-hydroxypropyl sulfonate (0.95g), sodium lauryl sulfate and polyoxyethylene lauryl ether (0.7g) were used as emulsifiers and polymerized in the same manner as in Example 1, A binder composition including a copolymer in the form of latex particles having an average particle diameter of 151 nm was prepared. [157] (2) Preparation of negative electrode mixture and negative electrode [158] Using the binder of Example 4 instead of the binder of Example 1, a negative electrode mixture was prepared in the same manner as in Example 1, and the negative electrode of Example 4 was manufactured using the negative electrode mixture. [159] Example 5 [160] (1) Preparation of binder [161] Monomers include (a) 1,3-butadiene (45g), (b1) styrene (46.3g), (b2) methyl methacrylate (5g), (b5) acrylic acid and itaconic acid (3g), (c) sodium 3-allyloxy-2-hydroxypropyl sulfonate (0.7 g), sodium lauryl sulfate and polyoxyethylene lauryl ether (0.7 g) were used as emulsifiers and polymerized in the same manner as in Example 1, A binder composition including a copolymer in the form of latex particles having an average particle diameter of 153 nm was prepared. [162] (2) Preparation of negative electrode mixture and negative electrode [163] Using the binder of Example 5 instead of the binder of Example 1, a negative electrode mixture was prepared in the same manner as in Example 1, and the negative electrode of Example 5 was prepared using the negative electrode mixture. [164] Comparative Example 1 [165] (1) Preparation of binder [166] As a monomer, (a) 1,3-butadiene (42.5 g), (b1) styrene (49.5 g), (b2) methyl methacrylate (5 g), (b5) acrylic acid and itaconic acid (3 g) are used as emulsifiers. Sodium lauryl sulfate and polyoxyethylene lauryl ether (1.3 g) were added to water containing NaHCO 3 as a buffer, and the temperature was raised to 75° C., and then ammonium persulfate as a polymerization initiator was added to perform single polymerization. A binder composition including a copolymer in the form of latex particles was prepared by reacting for about 8 hours while maintaining a temperature of 75°C. The binder composition of Comparative Example 1 thus obtained had a total solid content of 40%, and the average particle diameter of the latex particles measured using a particle size analyzer (NICOMP AW380, manufactured by PSS) was 113 nm. The pH of the polymerization-completed binder composition was adjusted to neutral (pH 7) using sodium hydroxide. [167] (2) Preparation of negative electrode mixture [168] The negative electrode uses water as a dispersion medium and uses natural graphite 96.9 (g), acetylene black (0.4 g), a binder for secondary batteries in the form of latex particles prepared in Comparative Example 1 (1.5 g), and carboxymethyl Cellulose (1.2g) was mixed, and the total solid content was 50% by weight to prepare a slurry-like negative electrode mixture for negative electrode. [169] (3) Preparation of negative electrode [170] Using a comma coater, the negative electrode mixture of Comparative Example 1 was coated on a copper foil to a thickness of 100 micrometers, put in a dry oven at 90° C., dried for 15 minutes, and roll-pressed to a total thickness of 70 μm ( roll-press) to obtain a negative electrode of Comparative Example 1. [171] Comparative Example 2 [172] (1) Preparation of binder [173] Monomers include (a) 1,3-butadiene (42.5g), (b1) styrene (49.2g), (b2) methyl methacrylate (5g), (b5) acrylic acid and itaconic acid (3g), (c) Polymerization was carried out in the same manner as in Comparative Example 1, except that sodium 3-allyloxy-2-hydroxypropyl sulfonate (0.3 g) was used, and a binder composition including a copolymer in the form of latex particles having an average particle diameter of 111 nm was prepared. Was prepared. [174] (2) Preparation of negative electrode mixture and negative electrode [175] Using the binder of Comparative Example 2 instead of the binder of Comparative Example 1, a negative electrode mixture was prepared in the same manner as in Comparative Example 1, and the negative electrode of Comparative Example 2 was manufactured using the negative electrode mixture. [176] Comparative Example 3 [177] (1) Preparation of binder [178] Monomers include (a) 1,3-butadiene (42g), (b1) styrene (47.1g), (b2) methyl methacrylate (5g), (b5) acrylic acid and itaconic acid (2.9g), (c) Polymerization was carried out in the same manner as in Comparative Example 1, except that sodium 3-allyloxy-2-hydroxypropyl sulfonate (3g) was used to prepare a binder composition including a copolymer in the form of latex particles having an average particle diameter of 110 nm. I did. [179] (2) Preparation of negative electrode mixture and negative electrode [180] Using the binder of Comparative Example 3 instead of the binder of Comparative Example 1, a negative electrode mixture was prepared in the same manner as in Comparative Example 1, and the negative electrode of Comparative Example 3 was manufactured using the negative electrode mixture. [181] Comparative Example 4 [182] (1) Preparation of binder [183] Monomers include (a) 1,3-butadiene (41g), (b1) styrene (47g), (b2) methyl methacrylate (4g), (b5) acrylic acid and itaconic acid (3g), (c) sodium 3 -Polymerization was performed in the same manner as in Comparative Example 1, except that allyloxy-2-hydroxypropyl sulfonate (5 g) was used, to prepare a binder composition including a copolymer in the form of latex particles having an average particle diameter of 108 nm. [184] (2) Preparation of negative electrode mixture and negative electrode [185] Using the binder of Comparative Example 4 instead of the binder of Comparative Example 1, a negative electrode mixture was prepared in the same manner as in Comparative Example 1, and the negative electrode of Comparative Example 4 was manufactured using the negative electrode mixture. [186] Comparative Example 5 [187] (1) Preparation of binder [188] Monomers include (a) 1,3-butadiene (45g), (b1) styrene (46.7g), (b2) methyl methacrylate (5g), (b5) acrylic acid and itaconic acid (3g), (c) sodium 3-allyloxy-2-hydroxypropyl sulfonate (0.3 g) was added to water containing sodium lauryl sulfate and polyoxyethylene lauryl ether (1.3 g) as an emulsifier, and NaHCO 3 as a buffer, and After heating up to, ammonium persulfate was added as a polymerization initiator to perform polymerization. A binder composition including a copolymer in the form of latex particles was prepared by reacting for about 10 hours while maintaining a temperature of 70°C. The binder composition of Comparative Example 1 thus obtained had a total solid content of 38%, and the average particle diameter of the latex particles measured using a particle size analyzer (NICOMP AW380, manufactured by PSS) was 110 nm. The pH of the polymerization-completed binder composition was adjusted to neutral (pH 7) using sodium hydroxide. [189] (2) Preparation of negative electrode mixture and negative electrode [190] Using the binder of Comparative Example 5 instead of the binder of Comparative Example 1, a negative electrode mixture was prepared in the same manner as in Comparative Example 1, and the negative electrode of Comparative Example 5 was prepared using the negative electrode mixture. [191] The contents of the monomers used in Examples and Comparative Examples are summarized in Table 1 below. [192] [Table 1] [193] Experimental Example 1: Latex stability test [194] In order to check the mechanical stability of the latex particles prepared in Examples and Comparative Examples, 150 g of each latex particle was put into a container using a homogenizer, the head was immersed in the latex, and then shear was applied at 3000 rpm for 10 minutes and 200 mesh. The amount of coagulum was measured by filtering and the results are shown in Table 2 below. [195] Experimental Example 2: Measurement of gel content [196] The binders prepared in Examples and Comparative Examples were calculated using Equation 1 above. Specifically, after drying a predetermined binder at 80° C. for 24 hours, about 0.5 g was taken to measure the correct weight, and this was taken as M a of Equation 1 . Then, the weight-measured binder was immersed in 50 g of THF (Tetrahydrofuran) for 24 hours. After filtering the binder contained in THF in 200 mesh of known weight, the mesh and the copolymer remaining in the mesh were dried together at 80 degrees for 24 hours, and the weight of the mesh and the copolymer remaining in the mesh was measured. , Here, the weight limit of 200 Mesh was taken as M b, which is the weight of the copolymer remaining in the mesh . [197] At this time, the gel content of each binder was calculated as an average value for three or more samples per each binder, and the results are shown in Table 2 below. [198] Experimental Example 3: Electrode adhesion test [199] In order to measure the adhesion between the electrode mixture and the current collector when using the binder according to the present invention, the surfaces of each of the positive and negative electrodes prepared in Examples and Comparative Examples were cut and fixed to a slide glass, and then the current collector was peeled off 180 degrees. The strength was measured, and the average value was calculated after measuring five or more peeling strengths per electrode, and the results are shown in Table 2 below. [200] [Table 2] [201] *Based on the total amount of monomer used [202] Referring to Table 2, it can be seen that the latex particles according to the embodiment of the present invention exhibit excellent mechanical stability and at the same time improve the adhesion of the mixture layer employing these latex particles as a binder to the negative electrode current collector. On the other hand, a comparative example in which sodium 3-allyloxy-2-hydroxypropyl sulfonate, which is the third monomer, is not used, is used in an amount of less than 0.5% by weight of the total monomer content, or is used in excess of 0.95% by weight of the total monomer content. According to the latex particles, the mechanical stability of the latex particles is low, so it is not easy to apply them on the current collector in the form of a slurry, or the adhesion of the mixture layer employing these latex particles as a binder to the negative electrode current collector is low, thereby preventing electrode failure. Can cause. [203] Accordingly, the electrode binder composition according to an embodiment of the present invention includes a copolymer, which is latex particles exhibiting excellent latex stability, and is easily applied on the current collector in the form of a slurry, while an electrode manufactured using the electrode binder composition Since the mixture has excellent binding power to the current collector, it is expected that the overall performance of the secondary battery can be greatly improved. Claims [Claim 1] a) a first repeating unit derived from an aliphatic conjugated diene-based first monomer; b1) aromatic vinyl monomer, b2) alkyl (meth) acrylic acid ester monomer, b3) (meth) acrylamide monomer, b4) alkenyl cyanide monomer, and b5) unsaturated carboxylic acid monomer. A second repeating unit derived from a second or more species of monomers; And c) a third repeating unit derived from a third monomer represented by Formula 1, wherein the third repeating unit is 0.5 based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit To 0.95% by weight, containing a copolymer, a binder composition for secondary battery electrodes: [Formula 1] In Formula 1, M is an alkali metal, X is a hydrogen or a methyl group, and Y is a C 1 to C 10 Alkylene, Z is an oxygen atom, or NR, wherein R is hydrogen or an alkyl group having 1 to 10 carbon atoms. [Claim 2] The method of claim 1, wherein the first monomer is 1,3-butadiene, 2-methyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 1,2-dimethyl-1,3- Butadiene, 1,4-dimethyl-1,3-butadiene, 1-ethyl-1,3-butadiene, 2-phenyl-1,3-butadiene, 1,3-pentadiene, 1,4-pentadiene, 3- Methyl-1,3-pentadiene, 4-methyl-1,3-pentadiene, 2,4-dimethyl-1,3-pentadiene, 3-ethyl-1,3-pentadiene, 1,3-hexadiene , 1,4-hexadiene, 1,5-hexadiene, 2-methyl-1,5-hexadiene, 1,6-heptadiene, 6-methyl-1,5-heptadiene, 1,6-octadiene , 1,7-octadiene and at least one selected from the group consisting of 7-methyl-1,6-octadiene, a binder composition for secondary battery electrodes. [Claim 3] The binder composition of claim 1, wherein the first repeating unit is contained in an amount of 0.1 to 60% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit. . [Claim 4] The method of claim 1, wherein the second monomer is at least three selected from the group consisting of b1) an aromatic vinyl monomer, b2) an alkyl (meth)acrylic acid ester monomer, and b5) an unsaturated carboxylic acid monomer. Binder composition. [Claim 5] The binder composition for a secondary battery electrode according to claim 1, wherein the second repeating unit is contained in an amount of 39 to 99.4% by weight based on the total content of the first repeating unit, the second repeating unit, and the third repeating unit. . [Claim 6] The binder composition for a secondary battery electrode according to claim 1, wherein in Formula 1, Y is methylene and Z is an oxygen atom. [Claim 7] The binder composition of claim 1, wherein the copolymer has a gel content of 95% or more calculated by the following Equation 1: [Equation 1] In Equation 1, M a represents the copolymer sample It is the weight measured after drying at 80 degrees for 24 hours, and M b is the copolymer remaining in the mesh and the mesh after immersing the measured copolymer in 50 g of THF (Tetrahydrofuran) for more than 24 hours and filtering through 200 mesh This is the weight of the copolymer remaining in the mesh after drying at 80 degrees for 24 hours. [Claim 8] The binder composition for a secondary battery electrode according to claim 1, wherein the copolymer is latex particles having an average particle diameter of 40 nm to 500 nm. [Claim 9] The binder composition for secondary battery electrodes according to claim 1, further comprising an aqueous solvent. [Claim 10] The binder composition for a secondary battery electrode according to claim 9, wherein the aqueous solvent is contained in an amount of 50 to 1,000 parts by weight based on 100 parts by weight of the copolymer. [Claim 11] Aliphatic conjugated diene-based first monomer; At least one second monomer selected from the group consisting of an aromatic vinyl monomer, an alkyl (meth)acrylic acid ester monomer, a (meth)acrylamide monomer, an alkenyl cyanide monomer, and an unsaturated carboxylic acid monomer; And emulsion polymerization of a third monomer represented by the following Formula 1 in the presence of an emulsifier and a polymerization initiator to prepare a copolymer, wherein the third monomer is selected from the first monomer, the second monomer, and the third monomer. A method of preparing a binder composition for a secondary battery electrode of claim 1, comprising the step of using 0.5 to 0.95% by weight based on the total content: [Chemical Formula 1] In Formula 1, M is an alkali metal, and X is a hydrogen or methyl group And Y is an alkylene having 1 to 10 carbon atoms, Z is an oxygen atom, or NR, wherein R is hydrogen or an alkyl group having 1 to 10 carbon atoms. [Claim 12] The method of claim 11, wherein the emulsion polymerization is performed by single polymerization or multistage polymerization. [Claim 13] A secondary battery electrode mixture comprising the binder for secondary battery electrodes of claim 1 and an electrode active material. [Claim 14] The secondary battery electrode mixture according to claim 13, further comprising a conductive material. [Claim 15] An electrode mixture layer comprising the secondary battery electrode mixture of claim 13; And a secondary battery electrode including an electrode current collector. [Claim 16] A secondary battery comprising the secondary battery electrode of claim 15.