Liquid composition and electronic component

Abstract

[Problem] To provide a liquid composition excellent in thickener solubility and metal particle dispersion stability, in addition to being excellent in shape retention during wiring formation. [Solution] This liquid composition is characterized by containing metal particles, a dispersion medium, and cellulose having an alkyloxyhydroxypropyl group.

Description

Liquid composition and electronic component

[0001] The present invention relates to a liquid composition and an electronic component.

[0002] In recent years, development of metal inks capable of forming circuit wiring has progressed. For example, Patent Literature 1 discloses a pressure-sensitive sensor whose resistance value changes in response to an applied load. It cites a dispense coating method as an example of a method for coating a low-resistance conductive paste (e.g., a paste containing metal particles) used in the sensor.

[0003] Furthermore, one of the unique properties of metal particles is a phenomenon known as melting point depression, in which nanoparticle-sized metal particles lower their melting point below that of the bulk. The use of such nanoparticle-sized metal particles enables sintering at a temperature lower than the bulk melting point. Therefore, from the viewpoints of reducing the thermal load on the substrate and improving production efficiency, it is preferable that the metal particles in the metal ink be in the form of nanoparticles.

[0004] Patent Documents 2 and 3 propose alcohol-based silver nanowire inks, and Patent Document 4 proposes an alcohol-based dispersion of metal fine particles such as silver particles. Patent Document 2 discloses a method for preparing a silver nanowire ink having a viscosity of 4.0 to 16.5 mPa·s by using hydroxypropylmethylcellulose with a specific substituent. Taking advantage of its low viscosity, this invention is applied in the form of a film and used for conductive films.

[0005] International Publication No. 2022 / 130754 Japanese Patent Application Laid-Open No. 2020-7404 Japanese Patent Application Laid-Open No. 2013-151644 Japanese Patent Application Laid-Open No. 2016-112704

[0006] However, the viscosity of the metal fine particle dispersion alone or the silver ink disclosed in Patent Documents 2 and 4 is too low, so when used to form circuit wiring, problems such as insufficient film thickness and sagging when placed upright occur. Therefore, there is room for improvement in terms of shape retention, etc.

[0007] In addition, the solubility of the thickener used to improve shape retention during wiring formation and the dispersion stability of the metal microparticles are also problematic. If the thickener does not completely dissolve in the dispersion, it may remain as fibrous foreign matter, which may appear in the ink after printing, marring the appearance and causing clogging of the printing device. In Patent Document 3, when preparing the dispersion of silver wires, undissolved gel is removed by filtration. Thus, when selecting a thickener, there is still room for improvement in terms of solubility in the dispersion medium and dispersion stability of the metal microparticles.

[0008] Therefore, an object of the present invention is to provide a liquid composition that has excellent solubility of a thickener, excellent dispersion stability of metal fine particles, and excellent shape retention during wiring formation.A further object of the present invention is to provide an electronic component having wiring formed from a liquid composition that has excellent shape retention during wiring formation.

[0009] As a result of intensive research into achieving the above-mentioned objective, the inventors discovered that the above-mentioned problem could be solved by preparing a liquid composition containing metal microparticles, a dispersion medium, and cellulose having alkyloxyhydroxypropyl groups, and thus completed the present invention.

[0010] That is, the present invention provides the following inventions. [1] A liquid composition comprising metal fine particles, a dispersion medium, and cellulose having alkyloxyhydroxypropyl groups. [2] The liquid composition according to [1], wherein the metal of the metal fine particles is one or more metals selected from the group consisting of gold, silver, copper, platinum, nickel, and iron oxide. [3] The liquid composition according to [1] or [2], wherein the content of the metal fine particles is 0.10 mass % or more and 50 mass % or less, based on the total mass of the metal fine particles and the dispersion medium. [4] The liquid composition according to any of [1] to [3], wherein the dispersion medium contains at least one of water and a water-soluble organic solvent. [5] The liquid composition according to any of [1] to [4], wherein the metal fine particles are a complex with an organic protective agent. [6] The liquid composition according to [5], wherein the organic protective agent is a compound having one or more of an amino group, a carboxy group, a hydroxy group, a thiol group, a phosphate group, a quaternary ammonium group, a quaternary phosphonium group, a cyano group, an ether group, a thioether group, or a disulfide group in the molecule. [7] The liquid composition according to [5] or [6], wherein the organic protective agent is a compound having one or more of a polyethyleneimine block, a polypropyleneimine block, or a polyallylamine block in the molecule. [8] The liquid composition according to any of [1] to [7], wherein the alkyl group of the alkyloxyhydroxypropyl group has 6 to 26 carbon atoms. [9] The liquid composition according to any of [1] to [8], wherein the content of the alkyloxyhydroxypropyl group is 0.1 to 10.0% by mass based on the cellulose having the alkyloxyhydroxypropyl group.

[10] The liquid composition according to any one of [1] to [9], wherein the content of the cellulose having an alkyloxyhydroxypropyl group is 0.10% by mass or more and 10.00% by mass or less, based on the total mass of the liquid composition.

[11] The liquid composition according to any one of [1] to

[10] , wherein the viscosity measured at 25°C and 5 rpm is 10 mPa·s or more and 100,000 mPa·s or less.

[12] The liquid composition according to any one of [1] to

[11] , wherein the Ti value at 25°C is 1.2 or more and 10.0 or less.

[13] The liquid composition according to any one of [1] to

[12] , which is used for dispense coating.

[14] An electronic component having wiring formed from the liquid composition according to any one of [1] to

[13] .

[0011] According to the present invention, a liquid composition can be obtained that exhibits excellent solubility of a thickener, excellent dispersion stability of metal microparticles, and excellent shape retention during wiring formation. That is, a liquid composition can be provided that is less likely to leave fibrous foreign matter and inhibits aggregation of metal microparticles. Therefore, the liquid composition of the present invention can be suitably used as an ink for dispense application. Furthermore, the wiring obtained by dispense application of the liquid composition is less likely to reduce the cross-sectional area of ​​the wiring and has a good wiring resistance value, making it useful as an electronic component.

[0012] [Liquid Composition] The liquid composition of the present invention contains at least metal fine particles, a dispersion medium, and cellulose having an alkyloxyhydroxypropyl group, and may further contain an organic protective agent and other components.

[0013] Each component constituting the liquid composition of the present invention will be described below.

[0014] (Metallic Fine Particles) The metallic species of the metallic fine particles is not particularly limited, and examples thereof include gold, silver, copper, nickel, zinc, aluminum, platinum, palladium, tin, chromium, lead, tungsten, and metal oxides such as iron oxide, zinc oxide, and indium tin oxide. Among these, transition metals such as gold, silver, copper, nickel, palladium, platinum, tungsten, and chromium are preferred. Furthermore, from the viewpoint of ease of handling as a dispersion or ink, gold, silver, copper, platinum, nickel, and iron oxide are more preferred. Furthermore, the metallic species may be one type, a mixture of two or more types, or an alloy.

[0015] The shape of the metal microparticles is not particularly limited as long as a liquid composition that can be dispensed and is storage stable is obtained, and metal microparticles of various shapes, such as spherical, lenticular, polyhedral, plate-like, rod-like, and wire-like shapes, can be used alone or in combination depending on the purpose.

[0016] The size of the metal fine particles is determined by observing the particle shape with an electron microscope, and when the observed shape is circular or polyhedral, the diameter is preferably 1 to 200 nm, and from the viewpoint of the stability of the liquid composition, it is more preferable to use particles of 2 to 100 nm. Furthermore, from the viewpoint of efficiently forming a denser and more uniform conductive layer by electroless plating or electroplating, metal fine particles of 5 to 50 nm are particularly preferable.

[0017] When the metal fine particles have a shape symmetrical with respect to the minor and major axes, such as a lens, rod, or wire shape, as observed in an electron microscope image, the minor axis is preferably 1 to 200 nm, more preferably 2 to 100 nm, and even more preferably 5 to 50 nm. The particle size distribution of the metal fine particles dispersed in the liquid composition may be monodisperse and uniform, or may be a mixture of metal fine particles having particle sizes within the preferred particle size range.

[0018] The method for producing the metal microparticles is not particularly limited, and various methods can be used for production. For example, there are gas phase methods such as low-vacuum gas evaporation and methods for reducing metal compounds in liquid phase. In both gas phase and liquid phase methods, the solvent composition of the dispersion at the time of production and the dispersion at the time of application can be changed by solvent exchange or solvent addition as appropriate, as necessary. Of the gas phase and liquid phase methods, the liquid phase method is preferably used in view of the stability of the dispersion and the simplicity of the production process.

[0019] As a method for producing metal fine particles by the liquid phase method, a method of reducing a metal compound in a liquid phase in the presence of an organic protective agent described below can be suitably used. For example, an organic protective agent having a polyethyleneimine block described below is dissolved or dispersed in a dispersion medium described below, and then a metal compound is added thereto, and a complexing agent is used in combination as necessary to form a uniform dispersion, or a reducing agent is mixed in together with the complexing agent, thereby converting the reduced metal into nanoparticles (fine particles having a size on the order of nanometers), and simultaneously obtaining a dispersion of metal fine particles protected by the organic protective agent.

[0020] In the present invention, the dispersion of metal microparticles obtained by these methods may be used as is, or may be used after undergoing a purification process in which excess complexing agent, reducing agent, or counterions contained in the metal compound used as a raw material are removed using various purification methods such as ultrafiltration, precipitation, centrifugation, reduced pressure distillation, and reduced pressure drying, either alone or in combination of two or more, or may be used after further changing the concentration or aqueous medium.

[0021] Metal compounds that can be used in these liquid-phase methods for producing metal microparticles include salts and oxides of the metal species that form the metal microparticles used in the present invention, i.e., gold, silver, copper, platinum, nickel, and iron. In particular, acetates, nitrates, sulfates, chlorides, acetylacetonates, and the like are preferred from the viewpoint of solubility. Among these, nitrates and acetates are preferred. However, even insoluble compounds such as metal oxides can be used as complexing agents, such as ammonia, amine compounds, hydrazines, and hydroxylamines, if they can coordinate with metal ions to form a soluble complex compound.

[0022] For example, when the metal species is gold or a platinum group metal, tetrachloroauric acid, tetrachloroplatinic acid, etc. can be used. When the metal species is copper, Cu(OAc) ２ , Cu(NO ３ ) ２ , CuCl ２ , Cu(HCOO) ２ , Cu(CH ３ COO) ２ , Cu(CH ３ CH ２ COO) ２ , CuCO ３ , CuSO ４ , C ５ H ７ CuO ２ In addition to the above, basic salts obtained by heating carboxylic acid salts, such as Cu(OAc) ２ CuO can also be used. When the metal species is silver, silver nitrate, silver oxide, silver acetate, silver chloride, silver sulfide, etc. can be used, but when handled as an aqueous solution, silver nitrate is preferred in terms of its solubility.

[0023] The content of the metal fine particles is preferably 0.10% by mass or more and 50% by mass or less, more preferably 0.7% by mass or more and 40% by mass or less, and even more preferably 1% by mass or more and 30% by mass or less, based on the total of the metal fine particles and the dispersion medium. If the content of the metal fine particles is within the above numerical range, the dispersion stability of the metal fine particles is excellent. Furthermore, if the content of the metal fine particles is within the above numerical range, the shape retention of the liquid composition of the present invention and the wiring resistance value are also good.

[0024] (Dispersion medium) Any dispersion medium may be used as long as it can disperse metal fine particles, and known dispersion mediums may be used. One dispersion medium may be used alone, or two or more dispersion mediums may be used in combination. The dispersion medium may be, for example, water, a water-soluble organic solvent, a mixed solvent of water and a water-soluble organic solvent, or a water-insoluble organic solvent.

[0025] Examples of the water-soluble organic solvent include alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, and tert-butyl alcohol; ketones such as acetone and 2-butanone; polyhydric alcohols such as ethylene glycol, propylene glycol, diethylene glycol, and glycerin, and other esters; and glycol ethers such as ethylene glycol monoethyl ether, ethylene glycol dimethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, propylene glycol methyl ether acetate, and butyl diethylene glycol acetate. These solvents can be used alone or in combination.

[0026] Examples of the water-insoluble organic solvent include long-chain alkanes such as hexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane, tetradecane, pentadecane, hexadecane, octadecane, nonadecane, eicosane, and trimethylpentane; cyclic alkanes such as cyclohexane, cyclobutane, and cyclooctane; aromatic hydrocarbons such as benzene, toluene, xylene, trimethylbenzene, and dodecylbenzene; and alcohols such as hexanol, heptanol, octanol, decanol, cyclohexanol, and terpineol. These solvents may be used alone or in combination.

[0027] In particular, the dispersion medium is preferably a solvent containing at least one of water and a water-soluble organic solvent, more preferably a solvent consisting of at least one of water and a water-soluble organic solvent, and particularly preferably water and at least one of ethanol and isopropyl alcohol, because it has excellent affinity with thickeners and organic protective agents. These dispersion media may be used alone or in combination, but it is more preferable to use a combination of multiple dispersion media.

[0028] Hereinafter, the dispersion of the metal fine particles in the dispersion medium is referred to as a metal fine particle dispersion.

[0029] Specific examples of metal fine particle dispersions include nano gold dispersions and nano platinum dispersions (both trade names, manufactured by Renaissance Energy Research Co., Ltd.), and any of the known metal fine particle dispersions can be used. One type of metal fine particle dispersion may be used alone, or two or more types may be used in combination.

[0030] (Cellulose Having Alkyloxyhydroxypropyl Groups) The liquid composition of the present invention contains cellulose having alkyloxyhydroxypropyl groups, which can thicken the metal fine particle dispersion.

[0031] Nonionic thickeners and the like are used as thickeners for metal microparticle dispersions, but in the liquid composition of the present invention, by using cellulose having the alkyloxyhydroxypropyl group, a liquid composition can be prepared that has excellent solubility of the thickener and maintains the dispersion stability of the metal microparticles.

[0032] The cellulose having an alkyloxyhydroxypropyl group used in the thickener of the present invention is a cellulose ether derivative to which an alkyloxyhydroxypropyl group, which is a hydrophobic group, has been introduced.

[0033] The cellulose having an alkyloxyhydroxypropyl group has the following structural formula (1): [In the formula, R １ , R ２ and R ３ are the same or different and are a hydrogen atom, a lower alkyl group, a -[CH ２ CH ２－ｋ (CH ３ ) ｋ O] ｍ H, or the group: —CH ２ CH(OH)CH ２ O.C. ｊ H ２ｊ＋１ n is an integer of 100 to 10,000, k is an integer of 0 or 1, m is an integer of 1 to 10, and j is an integer of 6 to 26. ２ CH(OH)CH ２ O.C. ｊ H ２ｊ＋１ It is preferable that the composition contains the following:

[0034] Among the cellulose ether derivatives that serve as raw materials for the cellulose having the alkyloxyhydroxypropyl group, it is particularly preferable to select hydroxypropylmethylcellulose (HPMC) from the viewpoint of availability. １ , R ２ and R ３ are the same or different and are —H, —CH ３ or group: -[CH ２ CH (CH ３ ) O] ｍ H, and the group: -[CH２ CH (CH ３ ) O] ｍ It contains H.

[0035] The cellulose having alkyloxyhydroxypropyl groups is obtained by introducing a long-chain alkyl group into HPMC, and is prepared, for example, by adding stearyl glycidyl ether: In addition to stearyl glycidyl ether, cetyl glycidyl ether, decyl glycidyl ether, and the like may also be used.

[0036] The liquid composition of the present invention contains a cellulose ether derivative having a stearyl group (-C １８ H ３７ By including a cellulose having a long-chain alkyloxyhydroxypropyl group, such as stearyloxyhydroxypropylmethylcellulose, into which a long-chain alkyl group such as methylcellulose has been introduced, the metal fine particle dispersion liquid is thickened and has good solubility.

[0037] Specific examples of the cellulose having an alkyloxyhydroxypropyl group include Sangelose 60L, Sangelose 60M, Sangelose 90L, and Sangelose 90M (all trade names, manufactured by Daido Chemical Industry Co., Ltd.), and any of the known celluloses can be used. One type of cellulose having an alkyloxyhydroxypropyl group may be used alone, or two or more types may be used in combination.

[0038] The alkyloxyhydroxypropyl group, which is a hydrophobic group introduced into the cellulose having the alkyloxyhydroxypropyl group represented by the structural formula (1): —CH ２ CH(OH)CH ２ O.C. ｊ H ２ｊ＋１ The number j is preferably 6 or more and 26 or less, more preferably 8 or more and 24 or less, even more preferably 12 or more and 24 or less, and most preferably 18. When the number of carbon atoms j is within the above range, the alkyloxyhydroxypropyl groups associate with each other intermolecularly, the viscosity increases dramatically, and the solubility in the dispersion medium improves due to the effect of the alkyl chain.

[0039] The content of the alkyloxyhydroxypropyl groups is preferably 0.1% by mass or more and 10.0% by mass or less, more preferably 0.1% by mass or more and 2.0% by mass or less, and even more preferably 0.1% by mass or more and 1.0% by mass or less, based on the cellulose having the alkyloxyhydroxypropyl groups. If the content of the alkyloxyhydroxypropyl groups is within the above range, the alkyloxyhydroxypropyl groups associate with each other intermolecularly, the viscosity increases dramatically, and the solubility in the dispersion medium improves due to the effect of the alkyl chain.

[0040] The lower alkyl group contained in the cellulose having an alkyloxyhydroxypropyl group represented by the structural formula (1) is preferably a methyl group, an ethyl group, or the like, with a methyl group being more preferred. The content of the lower alkyl group contained in the cellulose having an alkyloxyhydroxypropyl group represented by the structural formula (1) is preferably 10.0 to 50.0% by mass, more preferably 21.5 to 30.0% by mass, relative to the cellulose having an alkyloxyhydroxypropyl group. When the content of the lower alkyl group is within the above numerical range, the solubility in the dispersion medium is favorable.

[0041] A group contained in the cellulose having an alkyloxyhydroxypropyl group represented by the structural formula (1): —[CH ２ CH ２－ｋ (CH ３ ) ｋ O] ｍ When k is 0, H is a group: -[CH ２ CH ２ O] ｍ H, and when k is 1, the group: -[CH ２ CH (CH ３ ) O] ｍ Particularly preferred is the group when k is 1: -[CH ２ CH (CH ３ ) O] ｍ H. The group contained in the cellulose having an alkyloxyhydroxypropyl group represented by the structural formula (1): —[CH ２ CH ２－ｋ (CH ３ )ｋ O] ｍ The content of H is preferably 3.0 to 20.0% by mass, more preferably 7.0 to 11.0% by mass, based on the cellulose having alkyloxyhydroxypropyl groups. ２ CH ２－ｋ (CH ３ ) ｋ O] ｍ If the content of H is within the above range, the solubility in the dispersion medium becomes favorable.

[0042] The content of the cellulose having alkyloxyhydroxypropyl groups is preferably 0.10% by mass to 10.00% by mass, more preferably 0.20% by mass to 5.00% by mass, and even more preferably 0.30% by mass to 2.50% by mass, based on the total mass of the liquid composition. If the content of the cellulose having alkyloxyhydroxypropyl groups is within the above range, a liquid composition can be obtained that exhibits excellent dispersion stability of metal fine particles without impairing the solubility of the thickener and excellent shape retention during wiring formation.

[0043] The lower alkyl group contained in the cellulose having an alkyloxyhydroxypropyl group represented by the structural formula (1) is a group: -[CH ２ CH ２－ｋ (CH ３ ) ｋ O] ｍ H, and the group: —CH ２ CH(OH)CH ２ O.C. ｊ H ２ｊ＋１ The content of is a value measured by a method according to the section on "Hydroxypropylmethylcellulose 2208" of the 13th Edition of the Japanese Pharmacopoeia.

[0044] The weight average molecular weight of the cellulose having alkyloxyhydroxypropyl groups is preferably 10,000 or more and 10,000,000 or less, more preferably 50,000 or more and 5,000,000 or less, and even more preferably 100,000 or more and 1,000,000 or less.

[0045] The cellulose having alkyloxyhydroxypropyl groups may be mixed in the form of a powder with the metal fine particle dispersion, or may be mixed in the form of a solution in which the cellulose having alkyloxyhydroxypropyl groups is dissolved. When used in the form of a solution, water or a water / alcohol-based dispersion medium can be suitably used as a solvent for dissolving the cellulose having alkyloxyhydroxypropyl groups.

[0046] (Organic Protective Agent) In order to maintain further dispersion stability without aggregation, fusion, or precipitation of metal fine particles in a metal fine particle dispersion, it is preferable that the surfaces of the metal fine particles are protected by an organic protective agent. The organic protective agent is an organic compound having at least one functional group capable of coordinating with a metal, including a nitrogen atom, a sulfur atom, a phosphorus atom, or an oxygen atom. The organic protective agent can be appropriately selected depending on the type of metal fine particles to be dispersed and the type of dispersion medium to be used. These specific atoms may be contained alone in the organic protective agent, but from the viewpoint of efficiently exhibiting the above-mentioned functions, two or more different atoms may be contained in one molecule.

[0047] Examples of functional groups capable of coordinating with metals include amino groups (-NH ２ ), carboxy group (-COOH), hydroxy group (-OH), thiol group (-SH), phosphate group (H ２ P.O. ４ -), quaternary ammonium group (-NRR'R"4 ＋ The organic protecting agent can contain such functional groups in the form of a quaternary phosphonium group, a cyano group (-CN), an ether group (-O-), a thioether group (-S-), a disulfide group (-S-S-), or the like. These functional groups may be present alone or in combination in one molecule. As the protecting agent, a single compound may be used, or multiple compounds having such functional groups may be used simultaneously.

[0048] The organic protective agent is not particularly limited and may be a low molecular weight compound or a high molecular weight compound. Examples of low molecular weight compounds include 2-dimethylaminoethanol, 2-diethylaminoethanol, 2-dimethylaminoisopropanol, 3-diethylamino-1-propanol, 2-dimethylamino-2-methyl-1-propanol, 2-methylaminoethanol, 4-dimethylamino-1-butanol, formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tetradecanoic acid, oleic acid, linoleic acid, linolenic acid, stearic acid, oxalic acid, tartaric acid, phthalic acid, methacrylic acid, citric acid, acrylic acid, and benzoic acid. , cholic acid, ethylenediamine, propylamine, butylamine, trimethylamine, pentylamine, hexylamine, heptylamine, octylamine, nonylamine, decylamine, undecylamine, dodecylamine, tridecylamine, tetradecylamine, pentadecylamine, hexadecylamine, trioctylamine, dodecyldimethylamine, butylethanolamine, thiocholine bromide, allylthiol, octanethiol, decanethiol, dodecanethiol, L-cysteine, sodium sulfosuccinate, and sodium dodecylbenzenesulfonate.

[0049] Furthermore, as the high molecular weight compound, for example, a polymer having one or more types of polymer units in the molecule, such as polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, polyethylene glycol-polypropylene glycol copolymer, polyethyleneimine, polypropyleneimine, polypyrrole, poly(meth)acrylate, polystyrene, etc., can be suitably used. When having more than one type of these polymer units, the respective polymer units can be bonded directly or via an amide bond, an ester bond, an ether group (-O-), or a thioether group (-S-). Furthermore, when a part of the terminal of these polymers is an amino group (-NH ２), a carboxy group (-COOH), a carboxylic acid ester (-COOR: R is selected from methyl, ethyl, and propyl), a hydroxy group (-OH), a thiol group (-SH), or the like, and the polymer may have a terminal group of -OP(O)(OH). ２ or a polymer having a functional group represented by -SR (where R is an alkyl group having 1 to 18 carbon atoms, a phenyl group which may have a substituent on the benzene ring, or an alkyl group having 1 to 8 carbon atoms which has one or more functional groups selected from the group consisting of a hydroxy group, an alkoxy group having 1 to 18 carbon atoms, an aralkyloxy group having 1 to 18 carbon atoms, a phenyloxy group which may have a substituent on the benzene ring, a carboxy group, a salt of a carboxy group, a monovalent or polyvalent alkylcarbonyloxy group having 1 to 18 carbon atoms, and a monovalent or polyvalent alkoxycarbonyl group having 1 to 18 carbon atoms). These polymers can be used alone or in combination of two or more types.

[0050] Among these, from the viewpoint of dispersion stability of metal microparticles in the metal microparticle dispersion liquid, organic protective agents composed of compounds having one or more of polyethyleneimine blocks, polypropyleneimine blocks, and polyallylamine blocks in the molecule are particularly suitable for use.

[0051] When an organic protective agent composed of a compound having one or more of a polyethyleneimine block, a polypropyleneimine block, and a polyallylamine block in its molecule is used as the organic protective agent, it is preferable to use a nonionic thickener as the thickener, and it is particularly preferable to use cellulose having an alkyloxyhydroxypropyl group as described above. This prevents the organic protective agent from reacting with the thickener, thereby maintaining the dispersion stability of the metal microparticles.

[0052] The organic protective agent used in the present invention may be added during the production of the metal fine particles, or may be added after the production of the metal fine particles. When the organic protective agent is added during the production of the metal fine particles, it is preferable to add the organic protective agent during the production by a liquid phase method, because this not only simplifies the production process but also improves the stability of the dispersion.

[0053] (Other Additive Components) The liquid composition of the present invention may further contain other components, such as antioxidants, antifoaming agents, leveling agents, cyanate compounds, elastomers, mercapto compounds, thixotropic agents, adhesion promoters, chain transfer agents, polymerization inhibitors, copper inhibitors, rust inhibitors, and flame retardants, as required. These may be any of those known in the field of electronic materials.

[0054] [Preparation Method] The liquid composition of the present invention can be prepared by mixing a metal fine particle dispersion with a thickener. Any conventionally known mixing method can be used without any particular limitation.

[0055] When the cellulose having alkyloxyhydroxypropyl groups is used as a thickener and mixed with the metal particle dispersion, a dissolution method known as a hot water dispersion cooling method or a room temperature dissolution method may be used. The hot water dispersion cooling method is carried out as follows: (1) The cellulose having alkyloxyhydroxypropyl groups is added to warm water at 70°C or higher, and stirred until the cellulose having alkyloxyhydroxypropyl groups is dispersed. The stirring speed may be, for example, 200 rpm or higher. (2) After (1), the liquid is stirred while being cooled to a temperature of 5 to 30°C.

[0056] In the dissolving step of the cellulose having alkyloxyhydroxypropyl groups, the viscosity of the dispersion increases as the cellulose having alkyloxyhydroxypropyl groups dissolves. In particular, in order to reduce the amount of undissolved cellulose having alkyloxyhydroxypropyl groups, it is preferable to lower the external temperature as much as possible in the cooling step (2) and perform stirring for a long period of time. In addition, the use of a homomixer facilitates dissolution.

[0057] The room temperature dissolution method is carried out as follows: (1) Cellulose having alkyloxyhydroxypropyl groups is added to an alcohol solvent such as ethanol or butylene glycol to prepare a dispersion. The stirring speed may be, for example, 200 rpm or more. (2) Room temperature water is added to the dispersion prepared in (1), and the mixture is stirred until viscosity is achieved. The stirring speed may be, for example, 200 rpm or more.

[0058] In the step of dissolving the cellulose having alkyloxyhydroxypropyl groups, the viscosity of the dispersion increases as the cellulose having alkyloxyhydroxypropyl groups dissolves. The use of a homomixer also facilitates dissolution.

[0059] Furthermore, the cellulose having alkyloxyhydroxypropyl groups has high resistance to mechanical shearing force, allowing it to be used in a homomixer, which allows the cellulose having alkyloxyhydroxypropyl groups to maintain its high viscosity and is therefore less likely to lose viscosity.

[0060] Furthermore, a 1% by mass aqueous solution of the cellulose having alkyloxyhydroxypropyl groups reaches a cloud point at 45 to 60° C. Therefore, it is preferable to mix the cellulose having alkyloxyhydroxypropyl groups at 20 to 30° C. Furthermore, in order to raise the cloud point, it is preferable to blend an alcohol solvent such as ethanol, propanediol, or 1,3-butylene glycol.

[0061] [Uses] The liquid composition of the present invention can be preferably used as a material for forming wiring. For example, it can be solidified to form a conductor. A specific production method is described below, but wiring can be formed by forming a coating film made of the liquid composition of the present invention, drying it, and solidifying it. In particular, it can be preferably used for forming wiring by dispense coating.

[0062] [Viscosity] The viscosity of the liquid composition of the present invention at 5 rpm, as measured under the conditions described below, is preferably 10 mPa·s or more and 100,000 mPa·s or less, more preferably 100 mPa·s or more and 70,000 mPa·s or less, and even more preferably 1,000 mPa·s or more and 10,000 mPa·s or less. The Ti value of the liquid composition of the present invention, as measured under the conditions described below, is preferably 1.2 or more and 10.0 or less, more preferably 2.0 or more and 7.0 or less, and even more preferably 2.5 or more and 4.0 or less. When the viscosity and Ti value are within the above numerical ranges, printability and shape retention during wiring formation are good.

[0063] The viscosity of the liquid composition of the present invention is as follows: That is, in accordance with JIS-Z8803:2011, Section 10 "Method for measuring viscosity using a cone-plate rotational viscometer," the viscosity measured at 25°C, 5 rpm, and 30 seconds using a cone-plate rotational viscometer (TVE-33H, manufactured by Toki Sangyo Co., Ltd.) with a cone rotor of 1°34' x R24 or 3° x R14 is defined as the viscosity at 5 rpm, and the viscosity measured at 25°C, 50 rpm, and 30 seconds is defined as the viscosity at 50 rpm. The Ti value of the liquid composition of the present invention is defined as follows: That is, in accordance with JIS Z 8803:2011, Section 10 "Method for measuring viscosity using a cone-plate rotational viscometer," a cone-plate viscometer (TVE-35H, manufactured by Toki Sangyo Co., Ltd.) with a cone rotor of 1°34' x R24 was used to measure the viscosity at 5 rpm, 25°C, and 30 seconds (referred to as the viscosity at 5 rpm), and a viscosity at 50 rpm, 25°C, and 30 seconds (referred to as the viscosity at 50 rpm), and the viscosity was calculated using the following formula (1).

[0064] [Electronic Component] The electronic component of the present invention has a substrate and wiring formed from the liquid composition of the present invention. There are no particular limitations on the structure, formation method, or use of the electronic component as long as it is an electronic component having the wiring as a component, but examples thereof include sensors, actuators, condensers, inductors, transistors, converters, thermistors, connectors, transformers, capacitors, diodes, regulators, motors, antennas, switches, etc., and the electronic component may also have a combination of multiple uses among these uses.

[0065] Examples of the substrate include glass substrates, printed wiring boards and flexible printed wiring boards on which circuits have been formed in advance using copper or the like, copper-clad laminates for high-frequency circuits made of materials such as paper phenol, paper epoxy, glass cloth epoxy, glass polyimide, glass cloth / non-woven cloth epoxy, glass cloth / paper epoxy, synthetic fiber epoxy, fluororesin / polyethylene / polyphenylene ether, polyphenylene oxide / cyanate, and the like, and copper-clad laminates of all grades (FR-4, etc.), as well as metal substrates, polyimide films, polyethylene terephthalate films, polyethylene naphthalate (PEN) films, ceramic substrates, wafer plates, etc.

[0066] [Method of Manufacturing Electronic Components] An example of a method of manufacturing an electronic component will be described, which includes, for example, a step of dispensing and applying the liquid composition onto the substrate to form wiring.

[0067] Dispense coating is a method of coating using a device that dispenses a fixed amount of coating liquid (in the present invention, the liquid composition). The dispensing method is not particularly limited and can be appropriately selected from, for example, an air pulse method (pneumatic method, syringe method) in which the coating liquid is pushed out by air pulses, a mechanical method in which the coating liquid is pushed out by motor drive, a non-contact method (jet method) in which the coating liquid is sprayed without contacting the substrate, a tubing method in which pressure is applied to a tube containing the coating liquid to push out the coating liquid in the tube, and a plunger method in which fluid is mechanically compressed in a cylinder. Alternatively, a volumetric metering method in which the coating amount is controlled by the coating volume or weight may be used. As an example of coating, air pulse dispense coating will be described.

[0068] Air pulse dispense coating typically comprises a syringe as a container filled with the coating liquid, and a needle as a nozzle attached to the tip of the syringe. During use, the needle is brought close to the object to be coated (in the present embodiment, a glass substrate) (usually at a distance of several tens of μm to several mm), and air is pumped into the syringe. The pressure of this air causes the coating liquid to be ejected from the tip of the needle. The ejected coating liquid adheres to the object to be coated, and then the needle moves away from the object to complete the coating.

[0069] Compared to photolithography, which is one of the competing technologies, wiring formation by dispense coating requires fewer steps and does not require etching, which reduces material loss and waste liquid, making it an environmentally friendly process.In addition, it is possible to apply the coating to curved substrates and to form wiring by 3D application on substrate walls, making it suitable for forming wiring on various electronic components.

[0070] When performing dispense coating, it is preferable that the coating liquid does not contain fibrous foreign matter. If the coating liquid contains fibrous foreign matter, the fibrous foreign matter will appear in the coating film, impairing its appearance, and the fibrous foreign matter may clog the needle, causing discharge defects.

[0071] The discharge method, syringe container, nozzle diameter, discharge pressure, distance between the needle tip and the coating target, coating speed, coating length, etc. in dispense coating may be changed as appropriate depending on the coating liquid to be applied, the coating target, or both.

[0072] The coating process may be carried out continuously or batchwise. The coating process may be carried out under normal pressure or reduced pressure. Furthermore, the coating process may be carried out alone or in combination with a pretreatment of the substrate to be coated or with a drying process described below.

[0073] After applying the liquid composition by the above method, the dispersion medium contained in the composition is dried (pre-dried) at a temperature of 60 to 200°C for 1 to 15 minutes. Pre-drying allows the solvent to volatilize while suppressing bumping of the dispersion medium, making it easier to form wiring that maintains its shape. The temperature and time of pre-drying are not particularly limited and may be changed as appropriate depending on the coating film, production efficiency, and the performance of the dryer used.

[0074] The pre-drying can be carried out using a hot air circulation drying oven, an IR oven, a hot plate, a convection oven, etc. (a method in which hot air in a dryer equipped with a heat source of an air heating type using steam is brought into countercurrent contact with the substrate, or a method in which hot air is blown onto the substrate from a nozzle). Examples of the apparatus include a hot plate such as NINOS ND-2A (manufactured by AS ONE Corporation).

[0075] Furthermore, after the preliminary drying, the coating is heated (for example, at a temperature of 100 to 300°C for 5 to 20 minutes) for final finish drying (main drying). Main drying removes the dispersion medium and organic protective agent remaining in the coating film and also promotes sintering of the metal fine particles, forming wiring with excellent properties such as wiring resistance. As with the preliminary drying, the apparatus used for the main drying may be a hot plate such as NINOS ND-2A (manufactured by AS ONE Corporation). The temperature and time for main drying are not particularly limited and may be changed as appropriate depending on the coating film, production efficiency, and the performance of the dryer used.

[0076] The lower limit of the temperature for the main drying in the present invention is preferably 100°C, more preferably 150°C, and even more preferably 200°C. By setting the temperature for the main drying at or above the lower limit, sufficient sintering of the metal microparticles occurs and volatile matter can be sufficiently volatilized. On the other hand, the upper limit of the temperature for the main drying is preferably 300°C, more preferably 270°C, and even more preferably 250°C. By setting the temperature for the main drying at or below the upper limit, deterioration of the substrate can be suppressed.

[0077] The lower limit of the main drying time in the present invention is preferably 1 minute, more preferably 3 minutes, and even more preferably 5 minutes. By setting the main drying time to be equal to or greater than the above lower limit, sufficient sintering of the metal microparticles occurs and volatile components can be sufficiently volatilized. On the other hand, the upper limit of the main drying time is preferably 20 minutes, more preferably 15 minutes, and even more preferably 10 minutes. By setting the main drying time to be equal to or less than the above upper limit, it is possible to increase production efficiency and suppress deterioration of the substrate.

[0078] The present invention will be described in more detail below using examples, but the present invention is not limited to the following examples. In the following, "parts" and "%" are all by mass unless otherwise specified.

[0079] Examples 1-9, Comparative Examples 1-6 Synthesis of Organic Protecting Agents Synthesis of Compounds Having Polyethyleneimine Blocks and Polyethylene Glycol Blocks A solution was prepared by mixing 150 g (30 mmol) of mono-terminated polyethylene glycol (PEGM) [number average molecular weight (Mn) 5000] (manufactured by Aldrich) and 24 g (300 mmol) of pyridine in 150 ml of chloroform, and a solution was prepared by uniformly mixing 29 g (150 mmol) of tosyl chloride and 30 ml of chloroform. While stirring the PEGM and pyridine mixed solution at 20°C, a toluene solution of tosyl chloride was added dropwise. After the addition was completed, the mixture was allowed to react at 40°C for 2 hours. After the reaction was completed, the mixture was diluted with 150 ml of chloroform, washed with 250 ml (340 mmol) of 5% aqueous HCl solution, and then washed with saturated saline and water. The resulting chloroform solution was dried over sodium sulfate, the solvent was removed using an evaporator, and the mixture was further dried. The yield was 100%. １ The peaks were assigned by H-NMR spectrum (2.4 ppm: methyl group in the tosyl group, 3.3 ppm: methyl group at the PEGM terminal, 3.6 ppm: EG chain of PEG, 7.3-7.8 ppm: benzene ring in the tosyl group), confirming the identity of the product as tosylated polyethylene glycol. 23.2 g (4.5 mmol) of the tosylated polyethylene glycol obtained above and 15.0 g (1.5 mmol) of branched polyethyleneimine (Epomin SP200, manufactured by Nippon Shokubai Co., Ltd.) were dissolved in 180 ml of dimethylacetamide (DMA), and 0.12 g of potassium carbonate was added. The mixture was reacted at 100°C for 6 hours under a nitrogen atmosphere. After completion of the reaction, the solid residue was removed, and a mixed solvent of 150 ml of ethyl acetate and 450 ml of hexane was added to obtain a precipitate. The precipitate was dissolved in 100 ml of chloroform, and a mixed solvent of 150 ml of ethyl acetate and 450 ml of hexane was added again to reprecipitate the product. It was filtered and dried under reduced pressure. １ The peaks were assigned by H-NMR spectrum (2.3-2.7 ppm: ethylene of branched PEI, 3.3 ppm: methyl group at the PEG terminal, 3.6 ppm: EG chain of PEG), and it was confirmed that the compound had a PEG-branched PEI structure. The yield was 99%.

[0080] <Preparation of Metal Microparticle Dispersion> 10.0 g of silver oxide was added to 138.8 g of the aqueous solution containing 0.592 g of the compound having a PEG-branched PEI structure obtained above, and the mixture was stirred at 25°C for 30 minutes. Subsequently, 46.0 g of dimethylethanolamine was gradually added with stirring. The reaction solution turned black-red and generated some heat, but was left to stir at 25°C for 30 minutes. Then, 15.2 g of a 10% aqueous ascorbic acid solution was gradually added with stirring. Stirring was continued for an additional 20 hours while maintaining the temperature, yielding a black-red dispersion. A mixed solvent of 200 ml of isopropyl alcohol and 200 ml of hexane was added to the dispersion after the reaction was completed, and the mixture was stirred for 2 minutes, followed by centrifugal concentration at 3000 rpm for 5 minutes. After removing the supernatant, a mixed solvent of 50 ml of isopropyl alcohol and 50 ml of hexane was added to the precipitate, and the mixture was stirred for 2 minutes, followed by centrifugal concentration at 3000 rpm for 5 minutes. After removing the supernatant, 20 g of water was added to the precipitate and stirred for 2 minutes. The organic solvent was removed under reduced pressure to obtain an aqueous dispersion of silver microparticles as a complex with the organic protective agent. The resulting aqueous dispersion of silver microparticles was sampled, and visible absorption spectroscopy of a 10-fold diluted solution revealed a plasmon absorption spectrum peak at 400 nm, confirming the formation of silver nanoparticles. TEM observation also confirmed spherical silver nanoparticles (average particle diameter 17.5 nm). The silver content in the solid was measured using TG-DTA and found to be 97.2%. Based on this, the content of the compound having a PEG-branched PEI structure in the nonvolatile matter of the aqueous dispersion of silver particles obtained by this synthesis method can be estimated to be 2.8%. Ethanol was then added to the aqueous dispersion of silver microparticles obtained above to obtain a silver microparticle dispersion with a silver concentration of 10% and a water / ethanol (1 / 1 (w / w)) ratio. Subsequently, 0.1% silicone oil (KF-351A, manufactured by Shin-Etsu Silicone Co., Ltd.) was added.

[0081] <Preparation of Liquid Composition> For Example 1, 100 parts by mass of the silver particle dispersion after addition of silicone oil obtained above was weighed out and placed in a separable flask (round, 85 mm, 500 ml, manufactured by Shibata Scientific Co., Ltd.), the flask was covered with a separable cover (85 mm, 2-neck), and the components were blended while stirring (25°C, stirring speed 100 rpm) using a stirring blade (PTFE stirring blade, anchor type, rotating blade diameter φ80 mm) according to the formulation shown in Table 1 below. Examples 2 to 9 and Comparative Examples 1 to 6 were also prepared by blending the components in the same manner as in Example 1 according to the formulation shown in Table 1 below.

[0082]

[0083] The blending amounts in Table 1 indicate parts by mass. Details of each component in Table 1 are as follows. *1: Silver particle dispersion obtained in <Preparation of metal particle dispersion> *2: 0.2% nano gold dispersion (manufactured by Renaissance Energy Research) *3: 0.2% nano platinum dispersion (manufactured by Renaissance Energy Research) *4: Thickener 1: Cellulose having stearyloxyhydroxypropyl groups (Sangelose 60L, manufactured by Daido Chemical Industry Co., Ltd.; content of stearyloxyhydroxypropyl groups relative to cellulose having stearyloxyhydroxypropyl groups is 0.3 to 0.6% by mass) *5: Thickener 2: Cellulose having stearyloxyhydroxypropyl groups (Sangelose 60M, manufactured by Daido Chemical Industry Co., Ltd.; content of stearyloxyhydroxypropyl groups relative to cellulose having stearyloxyhydroxypropyl groups is 1.0 to 2.0% by mass) * 6: Thickener 3: Cellulose having a stearyloxyhydroxypropyl group (Sangelose 90L, manufactured by Daido Chemical Industry Co., Ltd.; content of stearyloxyhydroxypropyl groups relative to cellulose having a stearyloxyhydroxypropyl group: 0.3 to 0.6% by mass) * 7: Thickener 4: Hydroxyethyl cellulose (HEC CF-W, manufactured by Sumitomo Seika Chemicals Co., Ltd.) * 8: Thickener 5: Modified carboxylic acid-containing copolymer (Thixol K-1000, manufactured by Kyoeisha Chemical Co., Ltd.) * 9: Thickener 6: Hydroxypropyl methylcellulose (HPMC, manufactured by Unitec Foods Co., Ltd.)

[0084] <Solubility of Thickener> For the liquid compositions of Examples 1 to 9 and Comparative Examples 2 to 4 above, the stirring time until the thickener dissolved in the metal fine particle dispersion in <Preparation of Liquid Composition> was measured and evaluated according to the following criteria. ◎ and ○ were considered to be acceptable. ◎: Dissolved in less than 24 hours after addition ○: Dissolved in 24 to 36 hours after addition ×: Not completely dissolved 36 hours after addition, with insoluble matter remaining Comparative Examples 1, 5, and 6 were not evaluated because no thickener was blended.

[0085] <Presence or Absence of Aggregation of Metallic Fine Particles> The liquid compositions of Examples 1 to 9 and Comparative Examples 1 to 6 were placed in a sealed container and left at 25° C. for 3 days, after which the presence or absence of aggregates of metallic fine particles was visually confirmed. Those without aggregates were rated as passing.

[0086] <Viscosity Measurement> The viscosities of the liquid compositions of Examples 1 to 9 and Comparative Example 2 were measured at 25°C. That is, the viscosities at room temperature (25°C) were measured using an E-type viscometer (Toki Sangyo Co., Ltd., cone-plate type viscometer TVH-33). For Examples 1 and 4, a cone with a radius of 24 mm and an angle of 1°34' was used, and for the other samples, a cone with a radius of 14 mm and an angle of 3° was used. The rotation speed of the cone was changed to 5 and 50 rpm, and the viscosity values ​​after 30 seconds at each rotation speed (viscosity at 5 rpm and viscosity at 50 rpm) were measured. The Ti value was also calculated using the following mathematical formula (1): The viscosity at 5 rpm was too low to measure for Comparative Examples 1, 5, and 6. Furthermore, aggregation of silver particles was observed in Comparative Example 3, and insoluble matter of the thickener was observed in Comparative Example 4, so the samples were not evaluated.

[0087] <Shape Retention of Dispensed Coating Film> 10 g of each of the liquid compositions of Examples 1 to 9 and Comparative Examples 1, 5, and 6 was filled into a syringe container (PSY-10E, manufactured by Musashi Engineering Inc., material: polypropylene, capacity 10 ml), and a plunger (FLP-10E, manufactured by Musashi Engineering Inc.) was attached. The syringe was then attached to an air pulse type dispenser (desktop robot SHOTMASTER200, dispenser ML-5000XII, manufactured by Musashi Engineering Inc.) and dispensed under the following conditions. Coating substrate: slide glass (S7213, manufactured by Matsunami Glass Industrial Co., Ltd.) Needle: TPND-30G (double-threaded tapered nozzle, inner diameter 0.15 mm, manufactured by Musashi Engineering Inc.) Distance between needle tip and slide glass surface: 100 μm Discharge pressure: 0.02 MPa Coating speed: 10 mm / sec Coating length: 20 mm Insoluble matter of the thickener was confirmed in Comparative Examples 2 and 4, and aggregation of silver particles was confirmed in Comparative Example 3, so the test was not carried out.

[0088] After the dispense application, the coating film was quickly photographed, and the slide glass was quickly stood upright with the long side of the coating film parallel to the floor. This state was maintained for 30 seconds, and the coating film was photographed again. From the photographs of the coating film before and after standing, the change in line width in the short side direction of the coating film due to sagging of the coating film was evaluated according to the following criteria. ⊚ and ○ were rated as pass. ⊚: Line width change rate of the coating film before and after standing the slide glass was less than 10%. ○: Line width change rate of the coating film before and after standing the slide glass was 10% or more but less than 20%. ×: Line width change rate of the coating film before and after standing the slide glass was 20% or more.

[0089] <Wiring Resistance Value> After the above-mentioned dispense coating, the slide glass was left to stand at room temperature for 10 minutes to temporarily dry, and then heated at 150°C for 1 minute and then at 220°C for 7 minutes using a hot plate (NINOS ND-2A, manufactured by AS ONE Corporation). The resistance value between both ends of the coating film in the long side direction was measured using a 3540 mΩ HiTESTER (manufactured by Hioki E.E. Corporation).

[0090] The results of the above measurements and evaluations are shown in Table 2.

[0091] The results in Table 2 above demonstrate that the compositions of each Example exhibited excellent solubility of the thickener, dispersion stability of the metal microparticles, and shape retention during wiring formation. Compared to Comparative Examples 1, 5, and 6, the compositions of each Example demonstrated high shape retention during wiring formation. This is believed to be due to the viscosity and Ti values ​​obtained with thickeners 1 to 3 being suitable for the shape retention. In particular, Examples 1 to 7 demonstrated good resistance values ​​for the wiring obtained from the liquid compositions compared to Comparative Example 1. This is believed to be due to the excellent shape retention of the liquid compositions, which suppressed the reduction in the cross-sectional area of ​​the wiring. Furthermore, compared to Comparative Example 2, the compositions of each Example demonstrated high solubility of the thickener. This is believed to be due to the stearyloxyhydroxypropyl groups possessed by thickeners 1 to 3, which resulted in higher solubility than compositions using hydroxyethyl cellulose as a thickener. Furthermore, compared to Comparative Example 3, the compositions of each Example demonstrated no aggregation of the metal microparticles. This is believed to be due to the dispersion stability of the metal microparticles maintained by thickeners 1 to 3. It was also confirmed that the compositions of the examples had higher solubility of the thickeners than those of Comparative Example 4. This is thought to be because the stearyloxyhydroxypropyl groups in Thickeners 1 to 3 provided higher solubility than compositions using hydroxypropylmethylcellulose as a thickener.

Claims

1. A liquid composition comprising metal fine particles, a dispersion medium, and cellulose having alkyloxyhydroxypropyl groups.

2. The liquid composition according to claim 1, wherein the metal of the metal particles is one or more metals selected from the group consisting of gold, silver, copper, platinum, nickel, and iron oxide.

3. The liquid composition according to claim 1, wherein the content of the metal microparticles is 0.10 mass % or more and 50 mass % or less based on the total mass of the metal microparticles and the dispersion medium.

4. The liquid composition according to claim 1, wherein the dispersion medium comprises at least one of water and a water-soluble organic solvent.

5. The liquid composition according to claim 1, wherein the metal particles are a complex with an organic protective agent.

6. The liquid composition according to claim 5, wherein the organic protective agent is composed of a compound having one or more of an amino group, a carboxy group, a hydroxy group, a thiol group, a phosphate group, a quaternary ammonium group, a quaternary phosphonium group, a cyano group, an ether group, a thioether group, or a disulfide group in the molecule.

7. The liquid composition according to claim 5, wherein the organic protective agent is composed of a compound having one or more of a polyethyleneimine block, a polypropyleneimine block, and a polyallylamine block in the molecule.

8. The liquid composition according to claim 1, wherein the alkyl group of said alkyloxyhydroxypropyl group has 6 or more and 26 or less carbon atoms.

9. A liquid composition according to claim 1, wherein the content of the alkyloxyhydroxypropyl group is 0.1% by mass or more and 10.0% by mass or less relative to the cellulose having the alkyloxyhydroxypropyl group.

10. A liquid composition according to claim 1, wherein the content of the cellulose having an alkyloxyhydroxypropyl group is 0.10% by mass or more and 10.00% by mass or less based on the total amount of the liquid composition.

11. The liquid composition according to claim 1, having a viscosity of 10 mPa·s or more and 100,000 mPa·s or less when measured at 25°C and 5 rpm.

12. The liquid composition according to claim 11, wherein the Ti value at 25°C is 1.2 or more and 10.0 or less.

13. The liquid composition according to claim 1, which is used for dispense application.

14. An electronic component having wiring formed from the liquid composition according to any one of claims 1 to 13.

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