WO2005007710A1 - 塗工ペースト用バインダー樹脂 - Google Patents
塗工ペースト用バインダー樹脂 Download PDFInfo
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- WO2005007710A1 WO2005007710A1 PCT/JP2004/009127 JP2004009127W WO2005007710A1 WO 2005007710 A1 WO2005007710 A1 WO 2005007710A1 JP 2004009127 W JP2004009127 W JP 2004009127W WO 2005007710 A1 WO2005007710 A1 WO 2005007710A1
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- Prior art keywords
- paste
- resin
- binder resin
- coating
- modified
- Prior art date
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Classifications
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
- C03C8/16—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions with vehicle or suspending agents, e.g. slip
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
- C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/6342—Polyvinylacetals, e.g. polyvinylbutyral [PVB]
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F216/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical
- C08F216/38—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical by an acetal or ketal radical
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/48—Isomerisation; Cyclisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
- C04B2235/6026—Computer aided shaping, e.g. rapid prototyping
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6562—Heating rate
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/30—Composition of layers of ceramic laminates or of ceramic or metallic articles to be joined by heating, e.g. Si substrates
- C04B2237/32—Ceramic
- C04B2237/34—Oxidic
- C04B2237/345—Refractory metal oxides
- C04B2237/346—Titania or titanates
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- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
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- C04B2237/66—Forming laminates or joined articles showing high dimensional accuracy, e.g. indicated by the warpage
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- C04B2237/00—Aspects relating to ceramic laminates or to joining of ceramic articles with other articles by heating
- C04B2237/50—Processing aspects relating to ceramic laminates or to the joining of ceramic articles with other articles by heating
- C04B2237/70—Forming laminates or joined articles comprising layers of a specific, unusual thickness
- C04B2237/704—Forming laminates or joined articles comprising layers of a specific, unusual thickness of one or more of the ceramic layers or articles
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
- C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
- C04B35/4682—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates based on BaTiO3 perovskite phase
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/638—Removal thereof
Definitions
- the present invention has excellent dispersibility of inorganic powders such as conductive powders, ceramic powders, and glass powders, and when these are dispersed to form a paste, extremely excellent coating properties, especially printability, are obtained.
- the present invention relates to a binder resin, a conductive paste, a ceramic paste, and a glass paste for a coating paste comprising a polybutyl acetal resin that can be expressed.
- a multilayer electronic component for example, a multilayer ceramic capacitor is generally manufactured through the following steps (for example, Patent Documents 1 and 2).
- a plasticizer, a dispersant, and the like are added to a solution of a binder resin such as a polybutyral resin or a poly (meth) acrylate resin in an organic solvent, and then a ceramic raw material powder is added thereto.
- a ceramic slurry composition having a constant viscosity after defoaming.
- the obtained slurry composition is cast on a support such as a polyethylene terephthalate film or a SUS plate that has been subjected to a release treatment using a doctor blade, a reverse roll coater or the like. After evaporating volatile components such as a solvent by heating or the like, the resultant is separated from the support to obtain a ceramic green sheet.
- conductive pastes in which metal powders such as palladium and nickele are dispersed in a binder resin and a solvent are applied by screen printing or the like.
- an external electrode is sintered on the end surface of the fired ceramic product.
- a multilayer ceramic capacitor is obtained.
- a multilayer ceramic capacitor is manufactured by such a method, when laminating ceramic green sheets coated with a conductive paste, there is a difference between a portion where the conductive paste is coated and a portion where the conductive paste is not coated. A step occurs.
- multilayer ceramic capacitors have been required to have higher capacities, and further multi-layer and thin film capacitors have been studied.
- steps due to the presence or absence of the application of the conductive paste tend to accumulate. This can cause delamination and cause deformation of the dielectric layer or conductive layer at the end of the multilayer ceramic capacitor.
- Patent Document 3 discloses that after a conductive paste is screen-printed on a ceramic green sheet, a ceramic paste is applied to portions where the conductive paste is not applied by screen printing or the like. Describes a method for preventing the occurrence of a step.
- a display electrode and a bus electrode are formed on a glass substrate.
- a front glass substrate is manufactured by forming a dielectric layer and an MgO layer.
- a back glass substrate is manufactured by forming a data electrode on a glass substrate, forming a dielectric layer, and further forming a barrier rib and a phosphor layer.
- the front glass substrate and the rear glass substrate are bonded together, and after exhaust and discharge gas are filled in, the printed circuit board is mounted to complete the plasma display panel.
- the barrier rib is generally formed as follows (for example, Patent Documents 4 and 5). Apply a rear rib material and laminate dry film resist. The pattern is formed by exposing and developing through a photomask. Then, the rib is cut into a pattern by sandblasting, the remaining dry film resist is peeled off, and then fired. At this time, a glass paste in which glass powder is dispersed in a binder resin and a solvent is used as the no-rib material.
- an ethyl cellulose resin As a binder resin for supporting such an inorganic powder such as a conductive powder, a ceramic powder, and a glass powder, an ethyl cellulose resin has conventionally been mainly used. Paste with ethyl cellulose as binder resin has excellent coatability, especially screen printing Since a coating method such as that described above can be adopted, a coating film having a precise shape can be easily formed. However, ethyl cellulose has several significant problems.
- ethylcellulose when used as a conductive paste or ceramic paste binder resin for manufacturing a multilayer ceramic capacitor, the adhesiveness to a ceramic green sheet using a polybutylacetal resin as a binder resin is reduced. Inferior, so-called delamination tends to cause delamination. In particular, in recent years, multilayer ceramic capacitors have been required to have higher capacities, and further multilayer and thinner films are being studied. The occurrence of delamination is fatal. In addition, since ethyl cellulose is inferior in thermal decomposability, there has been a problem that even after degreasing, carbon components remain after firing and the electrical characteristics are impaired.
- ethyl cellulose when used as a binder resin of a glass paste for manufacturing a barrier rib of a plasma display panel, the ethyl cellulose is poor in alkali resistance and has low adhesion to glass, so that it can be used in the development process. As a result, there is a problem that the barrier rib is not formed in a desired pattern.
- polybutylacetal resin As a binder resin for a coating paste. Since polyvinyl acetal resin has excellent adhesive strength with ceramic green sheets, it is considered that the problem of delamination can be solved by using it as a binder resin of a conductive paste-to-ceramic paste for manufacturing a multilayer ceramic capacitor. In addition, since it is excellent in alkali resistance, when it is used as a binder resin of a glass paste for manufacturing a barrier rib of a plasma display panel, it is possible to suppress the occurrence of peeling during the development process.
- the paste obtained by using polybutylacetal resin as a binder resin has poor coatability, and when it is applied by the screen printing method, it causes problems such as stringing and clogging. There was a problem in that the separation of the printing plate became worse, the thickness accuracy was reduced, and the pattern could not be drawn clearly, resulting in a lower production yield.
- Patent Document 1 Japanese Patent Publication No. 3-35762
- Patent Document 2 Japanese Patent Publication No. 4-49766
- Patent Document 3 Japanese Patent Application Laid-Open No. 2002-280250
- Patent Document 4 JP-A-8-222135
- Patent Document 5 JP-A-2002-63849
- the present invention has excellent dispersibility of inorganic powders such as conductive powders, ceramic powders, and glass powders, and when these are dispersed to form a paste, extremely excellent coatability.
- An object of the present invention is to provide a binder resin for a coating paste, a conductive paste, a ceramic paste, and a glass paste made of a polyvinyl acetal-based resin capable of exhibiting printability.
- the present invention relates to a binder resin for a coating paste for forming a thin film or a thin film pattern by coating, which is represented by the following general formulas (1), (2), (3) and (4). It is a binder resin for coating paste containing a modified polybiacetal resin consisting of the structural units represented
- R 1 represents a straight-chain or branched alkyl group having 120 carbon atoms
- R 2 represents hydrogen, a straight-chain, branched or cyclic alkyl group having 120 carbon atoms or an aryl group.
- N represents an integer of 1 to 8.
- the content of the structural unit represented by the general formula (3) is 120 mol%
- the content of the structural unit represented by the general formula (4) is 30 to 78 mol%. 0/0.
- the present inventors have conducted intensive studies and as a result, it has been found that if a modified polyvinyl acetal resin having a specific structure is used as a binder resin, the adhesiveness to the ceramic green sheet ⁇ the Al resistance
- the present inventors have found that a paste which is excellent in resilience, excellent in resilience and excellent in coatability and can be applied by screen printing can be obtained, and the present invention has been completed.
- the binder resin for a coating paste of the present invention contains a modified polybutylacetal resin having a structural unit represented by the general formulas (1), (2), (3) and (4).
- the modified polybutylacetal resin includes a vinyl ester unit represented by the general formula (1), a vinyl alcohol unit represented by the general formula (2), a polyolefin unit represented by the general formula (3), and a general formula It consists of acetal units represented by (4).
- a modified polybulacetal resin has a structure similar to that of polybulacetal, so that it has extremely excellent adhesion to a ceramic green sheet using polybulacetal resin as a binder resin, and also has excellent alkali resistance.
- various properties such as viscosity and thixotropy can be adjusted to exert excellent coating properties.
- a paste having excellent printability can be obtained.
- the content of the ⁇ -olefin unit represented by the general formula (3) is 120 mol%. If the amount is less than 1 mol%, the paste obtained will have poor coatability, and the binder resin for coating paste will have poor thermal decomposability, resulting in residues when fired. If it exceeds 20 mol%, the modified polyvinyl acetal resin has poor solvent solubility and cannot be used as a binder resin for a coating paste, or the viscosity stability over time of the binder resin for a coating paste deteriorates. Preferably 1 one 10 mole%, more preferably 2-8 mol 0/0.
- the ⁇ -olefin unit is not particularly limited, and is derived from, for example, ethylene, propylene, 1_butene, 1_pentene, 1-hexene, 11heptene, 1-otaten, 4-methylinole 1_pentene, and the like. Unit. Among them, ethylene units derived from ethylene are preferred.
- the preferable upper limit of the number of the continuous olefin units is 10. If it exceeds 10, the modified polybutylacetal resin may have poor solvent solubility and may not be used as a binder resin for a coating paste.
- the modified polybutyl acetal resin an acetal unit represented by the general formula (4) is used.
- the content of position is 30- 78 mol 0/0. If it is less than 30 mole 0/0, the resulting modified polyvinyl Ruasetaru resin becomes insoluble in an organic solvent, it becomes an obstacle to the paste produced. If it exceeds 78 mol%, the toughness of the modified polybutylacetal resin obtained by reducing the residual hydroxyl groups may be impaired, and the strength of the coating film during paste printing may decrease.
- the ratio of adjacent acetal groups at the trans position is 3070%. Is preferred. If the content is less than 30%, the solvent solubility of the modified polybutyl acetal resin is poor, and the modified polybutyl acetal resin may not be used as a binder resin for a coating paste. If the content exceeds 70%, acetal bonds are easily dissociated, and the viscosity is increased. Storage stability may be inferior, such as the change in
- the content of Bulle alcohol unit represented by the general formula (2) is Shi preferred that a 20-30 mole 0/0 les. If the content is less than 20% by mole, the solvent solubility of the modified polyvinyl acetal resin is poor, and it may not be possible to use it as a binder resin for coating paste. If it exceeds 30% by mole, conductive powder, ceramic powder, glass The dispersibility of powder and the like may be poor. More preferably, it is 20 to 27 mol%.
- the proportion of adjacent hydroxyl groups at the trans position is 60% or more.
- the proportion of adjacent hydroxyl groups at the trans position is 60% or more.
- the interaction between hydroxyl groups between molecules becomes larger than the interaction between hydroxyl groups in the molecule, and the affinity with conductive powder, ceramic powder, glass powder, etc. is improved.
- the dispersibility thereof is improved. It is more preferably at least 70%.
- the content of the bulester unit represented by the general formula (1) is not particularly limited.
- the modified polybutylacetal resin further includes acrylic acid, methacrylic acid, (phthalic anhydride), (maleic anhydride), maleic acid (anhydride), itaconic acid, acrylonitrile methacrylonitrile, atalinoleamide, and methacrylolate.
- Amide trimethyl _ (3-acrylamide-1-3-dimethylpropyl) ammonium chloride, acrylamide _2_methylpropanesulfonic acid, and its sodium salt , Ethyl vinyl ether, butyl vinyl ether, N-vinyl pyrrolidone, biel chloride, bi-bromide, bi-fluoride, vinylidene salt, vinylidene fluoride, tetrafluoroethylene, sodium vinyl sulfonate, sodium aryl sulfonate, etc. It may contain a component derived from an ethylenically unsaturated monomer.
- the above-mentioned modified polyvinyl acetal resin can be imparted with time-dependent viscosity stability and the like.
- its content is preferably less than 2.0 mol%.
- the degree of polymerization of the modified polybutylacetal resin is not particularly limited, but is preferably 300 to 2400. If it is less than 300, the strength of the coating film obtained by screen printing is poor, and cracks and the like may easily occur.If it exceeds 2400, the viscosity of the conductive paste becomes too high, and the handling property is deteriorated. Sometimes.
- the modified polyvinyl acetal resin is obtained by using an E-type viscometer at a temperature of 25 ° C and a shear rate of 60 s- 1 to obtain a viscosity of 6. OPa's.
- the ratio of the rice occupancy 77 60 measured at a shear rate of 60 s- 1 at 25 ° C using a ⁇ type viscometer to the rice occupancy ⁇ 600 measured at a shear rate of 600 s- 1 ( ⁇ 60 / ⁇ 600) is preferably 2.0-5.0.
- the modified polybutylacetal resin was adjusted to have a viscosity of 6. OPa's at a shear rate of 60 s- 1 at 25 ° C using a ⁇ -type viscometer. In the solution, it is preferable that the phase angular force at 1 Hz and the stress lOOOPa is 3 ⁇ 47 ° or more.
- modified polybutylacetal resin was adjusted to a viscosity of 6. OPa's using an E-type viscometer at 25 ° C. under the conditions of a shear rate of SOS- 1. The shear rate from eoos- 1 to eos- 1 at 25 ° C
- Viscosity eta 600 when the shear rate 600S- 1 was measured using an E-type viscometer the ratio of by Heni spoon shear rate 60 s 1 forces, viscosity eta 60 after et 10 seconds (eta 600 ⁇ 60 / ⁇ 600) force. It is preferably 9 or more.
- the present inventors have prepared a paste prepared using the binder resin for a coating paste of the present invention.
- the case of screen printing was examined in detail, and it was found that in order to perform good screen printing, three different performances were required for the paste, such as coatability, plate separation, and shape retention. That is, in order to screen-print the obtained paste, usually, a plate on which a pattern is formed is superimposed on the printing surface, the paste is applied from above by using a squeegee, and then the plate is lifted vertically to lift the plate. Is performed from the printing surface.
- the present inventors have conducted further intensive studies and have found that by using a modified polyvinyl acetate resin having specific properties as a binder resin, a paste having more excellent coating properties, plate release properties, and shape retention properties can be obtained. It was found that it could be obtained.
- ⁇ 60 / ⁇ 600 is less than 2.0, the viscosity at the time of coating is too low to be spread evenly, and the viscosity of the paste in the plate pattern is too high, Or evenly spread evenly. If it exceeds 5.0, the viscosity at the time of coating is too high and it can be spread evenly. I'm sick. More preferably, it is 2.3-3.0.
- phase angle is a value that indicates the ratio between the viscosity and elasticity of an object. In the case of a viscous material such as paste, it is generally said that the closer to 90 °, the more viscous and water-like the material is. If the phase angle at 1 Hz and stress lOOOPa is less than 87 °, the paste will not cut easily when the plate is peeled off, and stringing will occur frequently.
- the phase angle can be measured by a dynamic viscoelasticity measurement method in which the phase angle is measured while applying a constant frequency.
- the phase angle at 1 Hz and stress lOOOPa is based on the stress applied to the paste when the plate is peeled off in a normal process.
- the viscosity of the paste that has penetrated into the pattern is sufficiently low to be uniformly filled in the pattern without bias. There is a need.
- the viscosity remains low after the plate is peeled off, It loses its shape and cannot maintain the pattern shape. Therefore, it is necessary for the paste, which exhibits thixotropic properties and once decreased in viscosity, to quickly increase in viscosity after filling in the pattern.
- 77600 ⁇ 60/77600 indicates the extent to which the viscosity of the resin solution whose viscosity has been reduced by applying pressure recovers when the pressure is removed.
- the viscosity after 10 seconds is considered in consideration of the time required for filling the paste in the pattern and the time required from coating to peeling of the plate in a normal process. If the ⁇ 600 ⁇ 60 / ⁇ 600 force is less than 1.9, the viscosity of the paste when the plate is peeled off is too low to maintain the pattern shape. More preferably, it is 2.0 or more.
- the above-mentioned modified polybutyl acetal resin can be produced by acetalizing a modified polybutyl alcohol having a content of a free fin unit of 120 mol% and a saponification degree of 80 mol% or more. it can.
- the above-mentioned modified polybutyl alcohol can be obtained by saponifying a copolymer obtained by copolymerizing a bullet ester and a olefin.
- a copolymer obtained by copolymerizing a bullet ester and a olefin for example, vinyl formate, biel acetate, biel propionate, bivarate bialeate and the like can be mentioned. Among them, vinyl acetate is preferable from an economic viewpoint.
- a modified polybutylacetal containing a component derived from the above-mentioned ethylenically unsaturated monomer is obtained, the ethylenically unsaturated monomer is further copolymerized.
- a vinyl ester-based monomer such as butyl acetate is copolymerized with Hi-Iseki Refin, and the terminally modified poly obtained by saponifying it.
- Vinyl alcohol can also be used.
- the lower limit of the degree of saponification of the modified polyvinyl alcohol is 80 mol%.
- the content is less than 80 monoles%, the solubility of the modified polyvinyl alcohol in water becomes poor, so that the acetalization reaction becomes difficult.
- the amount of hydroxyl groups is small, the acetalization reaction itself becomes difficult.
- modified polybutyl alcohol When the above-mentioned modified polybutyl alcohol is used, it is necessary to use a modified polybutyl alcohol having a haloolefin content in the range of 112 mol%, but a halo olefin content of 112 mol% is required. if% range, may be used alone the modified poly Bulle alcohol, if the finally obtained modified poly Bulle ⁇ Se non Orefuin content force 20 moles of tar resin 0/0, denatured Polybutyl alcohol and unmodified polybutyl alcohol May be used in combination.
- the modified polyvinyl alcohol at the time of acetalization is 80 mol% or more
- the modified polyvinyl alcohol alone or the modified polyvinyl alcohol having a saponification degree of 80 mol% or more is used.
- Polyvinyl alcohol and a modified polybutyl alcohol having a degree of saponification of less than 80 mol% may be mixed to adjust the degree of kenzi to at least 80 mol% before use.
- the modified polyvinyl acetal resin can be produced by acetalizing the modified polybutyl alcohol.
- the method of acetalization is not particularly limited, and a conventionally known method can be used. Examples thereof include a method of adding various aldehydes to an aqueous solution of the above-mentioned modified polybutyl alcohol in the presence of an acid catalyst such as hydrochloric acid.
- an acid catalyst such as hydrochloric acid.
- the aldehyde used for the acetalization is not particularly limited, and examples thereof include formaldehyde (including paraformaldehyde), acetoaldehyde (including paraacetaldehyde), propionaldehyde, butyraldehyde, amylaldehyde, and hexyl.
- Aldehydes heptylanolaldehyde, 2-ethylhexylaldehyde, cyclohexylaldehyde, furfural, glyoxal, glutanolealdehyde, benzaldehyde, 2-methylbenzanolaldehyde, 3-methylbenzaldehyde, 4-methylbenzaldehyde, p-hydroxybenz Aldehyde, m-hydroxybenzaldehyde, phenylacetaldehyde, ⁇ -phenylpropionaldehyde and the like.
- acetoaldehyde or butyl aldehyde power is suitable in terms of productivity, characteristic balance, and the like.
- These aldehydes may be used alone or in combination of two or more.
- the degree of acetalization in the acetalization is preferably in the range of 30 to 78 mol% in total acetalization degree regardless of whether a single aldehyde or a mixed aldehyde is used. If the total degree of acetalization is less than 30 mol%, the resin becomes water-soluble and insoluble in organic solvents, which hinders paste production. If the total acetal liability exceeds 78 mol%, the residual hydroxyl groups will decrease and the toughness of the modified polybutyl acetal resin will be impaired, and the film strength during paste printing may decrease.
- the calculation method of the degree of acetalization is to count the two acetalized hydroxyl groups because the acetal group of the modified polyvinyl acetal resin is formed by acetalization from two hydroxyl groups.
- the method of acetal Calculate the%.
- the binder resin for a coating paste of the present invention may be a conventional binder such as an acrylic resin, a cellulose resin, or a polyvinyl acetal resin, which may be composed of the above-mentioned modified polybutyl acetal resin alone. It may be a mixed resin with a resin used as a resin. In this case, a preferable lower limit of the content of the modified polybutyl acetal resin is 30% by weight.
- the binder resin for a coating paste of the present invention preferably has an alkali metal content of 500 ppm or less. When the content exceeds 500 ppm, when the conductive paste is used, there is a power S that the electrical properties are degraded. It is more preferably at most 200 ppm.
- the content of the alkali metal can be measured by an atomic absorption method.
- the binder resin for a coating paste of the present invention preferably has a halogen content of 500 ppm or less. If it exceeds 500 ppm, the electrical properties of the conductive paste may deteriorate. It is more preferably at most 200 ppm.
- the halogen content can be measured by an ion chromatography method.
- the binder resin for a coating paste of the present invention is made of a polybutyl acetal resin, when used as a conductive paste or a binder for a ceramic paste when producing a multilayer ceramic capacitor, the ceramic green sheet Has a high affinity for the compound and can suppress the occurrence of delamination.
- the ceramic green sheet has a high affinity for the compound and can suppress the occurrence of delamination.
- defects due to its excellent alkali resistance and adhesion to glass, when it is used as a binder for a glass paste when producing barrier ribs for PDP, defects such as chipping of the glass ribs that do not occur even during the development process occur. Since it becomes difficult, a desired pattern can be formed. Further, the obtained paste can exhibit extremely excellent coating properties, especially screen printing properties.
- the conductive paste containing the binder resin for a coating paste, the conductive powder, and the organic solvent of the present invention is also one of the present invention.
- Lamic paste is also one of the present invention.
- a glass paste containing the binder resin for a coating paste, glass powder and an organic solvent of the present invention is also one of the present invention.
- the conductive paste of the present invention contains a conductive powder and an organic solvent in addition to the binder resin for a coating paste of the present invention.
- the conductive powder is not particularly limited as long as it exhibits sufficient conductivity, and examples thereof include fine particles made of nickel, palladium, platinum, gold, silver, copper, and alloys thereof. These metal materials may be used alone or in combination of two or more.
- the blending amount of the binder resin for a coating paste of the present invention in the conductive paste of the present invention is not particularly limited, but a preferable lower limit is 3 parts by weight and a preferable upper limit is 25 parts by weight for 100 parts by weight of the conductive powder. Department. If the amount is less than 3 parts by weight, the film forming performance of the conductive paste may be inferior. If the amount exceeds 25 parts by weight, the carbon component tends to remain after degreasing and firing. A more preferred lower limit is 5 parts by weight, and a more preferred upper limit is 15 parts by weight.
- the organic solvent is not particularly restricted but includes, for example, ketones such as acetone, methyl ethyl ketone, dipropyl ketone and diisobutyl ketone; alcohols such as methanol, ethanol, isopropanol and butanol; Aromatic hydrocarbons such as xylene; methyl propionate, ethyl propionate, butyl propionate, methyl butanoate, ethyl butane, butyl butanoate, methyl pentanoate, ethyl pentanoate, butyl pentanoate, hexanoic acid Esters such as methyl, ethyl hexate, butyl hexate, 2-ethyl hexyl acetate, 2-ethyl hexyl butyrate, terbineol acetate, dehydroterbine mono- oleate acetate; methylcellosolve,
- the conductive paste of the present invention may further contain a dispersant.
- dispersant is not particularly limited, for example, fatty acids, aliphatic amines, alkanomonoamides, and phosphates are preferred.
- the fatty acid is not particularly limited, and includes, for example, behenic acid, stearic acid, palmitin Saturated fatty acids such as acids, myristic acid, lauric acid, strength pric acid, strength prillic acid, and coconut fatty acids; and unsaturated fatty acids such as oleic acid, linoleic acid, linolenic acid, sorbic acid, tallow fatty acid, and castor hardened fatty acid. .
- behenic acid stearic acid
- palmitin Saturated fatty acids such as acids, myristic acid, lauric acid, strength pric acid, strength prillic acid, and coconut fatty acids
- unsaturated fatty acids such as oleic acid, linoleic acid, linolenic acid, sorbic acid, tallow fatty acid, and castor hardened fatty acid.
- lauric acid, stearic acid, oleic acid and the like are preferred.
- the aliphatic amine is not particularly restricted but includes, for example, laurylamine, myristylamine, cetylamine, stearylamine, oleylamine, alkyl (coconut) amine, alkyl (hardened tallow) amine, alkyl (tallow) amine, alkyl (soybean) ) Amine and the like.
- the alkanolamide is not particularly limited, and includes, for example, coconut fatty acid diethanolamide, tallow fatty acid diethanolamide, lauric acid diethanolamide, oleic acid diethanolamide and the like.
- the phosphate ester is not particularly limited, and includes, for example, polyoxyethylene alkyl ether phosphate and polyoxyethylene alkylaryl ether phosphate.
- the conductive paste of the present invention may contain conventionally known additives such as a plasticizer, a lubricant, and an antistatic agent as long as the effects of the present invention are not impaired.
- the ceramic paste of the present invention contains a ceramic powder and an organic solvent in addition to the binder resin for a coating paste of the present invention.
- the ceramic powder examples include, but are not limited to, alumina, zirconia, aluminum silicate, titanium oxide, zinc oxide, barium titanate, magnesia, sialon, spinemullite, silicon carbide, silicon nitride, and nitride.
- a powder made of aluminum or the like may be used. These ceramic powders may be used alone or in combination of two or more. Among them, it is preferable that the ceramic green sheet be composed of the same component as the ceramic powder contained in the ceramic green sheet used.
- the blending amount of the binder resin for a coating paste of the present invention in the ceramic paste of the present invention is not particularly limited, but the lower limit is preferably 1 part by weight, and the upper limit is preferably 50 parts by weight based on 100 parts by weight of the ceramic powder. Department. If the amount is less than 1 part by weight, the film forming performance of the ceramic paste may be inferior. If the amount exceeds 50 parts by weight, the carbon component tends to remain after degreasing and firing. A more preferred lower limit is 3 parts by weight, and a more preferred upper limit is 30 parts by weight. It is.
- the organic solvent in the ceramic paste of the present invention is the same as in the case of the conductive paste.
- the ceramic paste of the present invention may contain various additives such as a dispersant as in the case of the conductive paste.
- the glass paste of the present invention contains glass powder and an organic solvent in addition to the binder resin for a coating paste of the present invention.
- the glass powder is not particularly limited, and examples thereof include lead oxide boron monoxide monoxide-calcium oxide glass, zinc oxide boron monoxide monoxide glass, lead oxide zinc oxide boron monoxide monoxide. Silicone glass and the like can be mentioned. These glass powders may be used alone or in combination of two or more. Further, aluminum oxide or the like may be used in combination as long as the object of the present invention is not impaired.
- the preferred lower limit of the average particle size of the glass powder is 0.05 xm, and the preferred upper limit is 10 zm. If it is less than 0.05 / im, the barrier ribs may collapse during firing, and if it is more than 10 / m, it becomes difficult to produce a dense rib.
- the amount of the binder resin for a coating paste of the present invention in the glass paste of the present invention is not particularly limited.
- a preferable lower limit is 2 parts by weight and a preferable upper limit is 100 parts by weight of the glass powder. 40 parts by weight. If the amount is less than 2 parts by weight, it may not be possible to reliably bind the glass powder. If the amount exceeds 40 parts by weight, the carbon component tends to remain after degreasing and firing.
- a more preferred lower limit is 4 parts by weight and a more preferred upper limit is 25 parts by weight.
- the organic solvent in the glass paste of the present invention is the same as in the case of the conductive paste.
- the glass paste of the present invention may contain various additives such as a dispersant as in the case of the conductive paste.
- the method for producing the conductive paste, ceramic paste and glass paste of the present invention is not particularly limited.
- the above-mentioned modified polyvinyl acetal resin, organic solvent, and conductive powder / ceramic powder / glass powder may be prepared using a blender mill. There is a method of mixing using various mixers such as a three-roll mill.
- the conductive paste, ceramic paste and glass paste of the present invention may be screen-printed or the like. By coating by the method, an extremely precise coating film containing an inorganic powder can be formed.
- a binder resin for a coating paste containing a modified polyvinyl acetal resin having a structural unit represented by the above general formulas (1), (2), (3) and (4), an organic solvent and an inorganic powder are mixed.
- a method of forming a film containing an inorganic powder having a step of preparing and applying a paste-like body is also one of the present invention.
- inorganic powders such as conductive powders, ceramic powders, and glass powders are excellent in dispersibility, and when these are dispersed to form a paste, extremely excellent coating properties, especially printability, are obtained. It is possible to provide a binder resin for a coating paste, a conductive paste, a ceramic paste, and a glass paste made of a polyvinyl acetal-based resin capable of exhibiting the following.
- Polymerization degree 1700, ethylene content 10mol%, saponification degree 88mol. /. 193 g of modified Polyvinyl Cornole was added to pure water (2900 g) and dissolved by stirring at a temperature of 90 ° C. for about 2 hours.
- This solution was cooled to 28 ° C, 20 g of hydrochloric acid having a concentration of 35% by weight and 115 g of n-butyraldehyde were added thereto, the temperature of the solution was lowered to 20 ° C, and this temperature was maintained to carry out the acetalization reaction.
- the reaction product was precipitated. Thereafter, the liquid temperature was maintained at 30 ° C. for 5 hours to complete the reaction, followed by neutralization, washing with water and drying by a conventional method to obtain a white powder of a modified polyvinyl acetal resin.
- the resulting modified polybutylacetal resin was dissolved in DMSO_d6 (dimethyl sulfoxide), and the degree of petitialization and the amount of hydroxyl groups were measured using 13 G- NMR (nuclear magnetic resonance spectrum). The amount of hydroxyl groups was 55 mol%, and the amount of hydroxyl groups was 23 mol%.
- the resulting modified polybutylacetal resin was used as a binder resin for a coating paste.
- a conductive powder 100 parts by weight of nickel fine particles ("2020SS” manufactured by Mitsui Kinzoku Co., Ltd.) 7 parts by weight of the obtained binder resin for a coating paste and 60 parts by weight of ⁇ -terbineol were added and kneaded with a three-roll mill to obtain a conductive paste.
- 2020SS nickel fine particles manufactured by Mitsui Kinzoku Co., Ltd.
- BT — 03 barium titanate having an average particle diameter of 0.3 ⁇
- the weight and 60 parts by weight of heartpineol were added and kneaded using a ball mill for 48 hours to obtain a ceramic paste.
- glass powder lead oxide boron monoxide-silicon oxide-aluminum oxide glass powder (composition: 66% by weight, 5% by weight, 24% by weight, 5% by weight)
- the glass paste was obtained by adding 5 parts by weight of the obtained binder resin for a coating paste and 30 parts by weight of Hi-terpineol and mixing with a ball mill.
- a modified polyvinyl acetal resin having the same degree of Petileri diversion and hydroxyl content as in Example 1 was prepared in the same manner as in Example 1 except that the modified polyvinyl alcohol was used, and this was used as a binder for a coating paste. As one resin, a conductive paste, a ceramic paste and a glass paste were obtained.
- a cetal resin was prepared.
- the resulting modified polybutylacetal resin and polybutylbutyral resin (Sekisui Chemical Co., Ltd., Eslek B "BM-S") were mixed at a weight ratio of 6: 4, and the resulting mixed material was mixed.
- a conductive paste, a ceramic paste and a glass paste were obtained using the resin as a binder resin for a coating paste.
- a modified polybutyl acetal resin was prepared in the same manner as in Example 1 except that a modified polybutyl alcohol was used and a mixture of n_butyraldehyde and acetoaldehyde in a weight ratio of 2: 1 was used as the aldehyde to be acetalized.
- This as a binder resin for coating paste, conductive paste, A ceramic paste and a glass paste were obtained.
- Asetaru degree of the resin is 60 mol 0/0, the amount of hydroxyl groups was 28 mol%.
- a modified polybutyl acetal resin was prepared in the same manner as in Example 1 except that the modified polybutyl alcohol was used as a binder resin for a coating paste to obtain a conductive paste, a ceramic paste, and a glass paste.
- the butyralization degree of this resin was 70 mol%, and the amount of hydroxyl groups was 23 mol%.
- the modified polybutyl acetal resin prepared in Examples 15 to 15 had an alkali metal and halogen concentration of 500 ppm or less.
- a conductive paste, a ceramic paste and a glass paste were obtained using commercially available ethyl cellulose (“STD_100” manufactured by Dow Chemical) as a binder resin for a coating paste.
- STD_100 commercially available ethyl cellulose
- a conductive paste, a ceramic paste and a glass paste were obtained using a commercially available ethylene-unmodified polybierbutyral resin (manufactured by Sekisui Chemical Co., Ltd., Eslec B “BM-S”) as a coating resin for the coating paste. .
- a conductive paste, a ceramic paste, and a glass paste were obtained using a commercially available acrylic resin (“B_66”, manufactured by Rohm & Haas Co., Ltd.) as a binder resin for a coating paste.
- the obtained binder resin for coating paste, conductive paste, ceramic paste and glass paste were evaluated by the following methods.
- BT-01 (average particle size: 0.3 zm)” manufactured by Sakai Chemical Industry Co., Ltd.
- a rally composition was obtained.
- the obtained slurry composition is applied on a release-treated polyester film so that the thickness after drying is about 5 zm, air-dried at room temperature for 1 hour, and a hot-air dryer at 80 ° C for 3 hours. Subsequently, it was dried at 120 ° C. for 2 hours to obtain a ceramic green sheet.
- a ceramic green sheet was cut into a size of 5 cm square, and 100 sheets of the conductive paste obtained on the screen were printed in a stack. The conditions were thermocompression bonding at a temperature of 70 ° C, a pressure of 150 kg / cm2, and 10 minutes. To obtain a ceramic green sheet laminate.
- the resulting ceramic green sheet laminate is heated in a nitrogen atmosphere to 450 ° C at a rate of 3 ° C / min, held for 5 hours, and further heated to 1350 ° C at a rate of 5 ° C / min.
- the mixture was heated and maintained for 10 hours to obtain a ceramic sintered body.
- the obtained ceramic sintered body was visually observed, and the thermal degradability of the ceramic green sheet laminate was evaluated according to the following criteria.
- the sintered body was cooled to room temperature, it was divided in half, and the state of the sheet near exactly 50 layers was observed with an electron microscope, and the presence or absence of delamination between the ceramic layer and the conductive layer was observed.
- the adhesiveness was evaluated according to the following criteria.
- the obtained slurry composition is applied on a release-treated polyester film so that the thickness after drying is about 10 zm, air-dried at room temperature for 1 hour, and a hot-air dryer at 80 ° C for 3 hours. Then, drying was performed at 120 ° C. for 2 hours to obtain a ceramic green sheet.
- the ceramic paste is applied on a polyethylene terephthalate film so as to have a thickness of 1 ⁇ m square after drying cm ⁇ , and the ceramic green sheet prepared in Evaluation (1) is laminated thereon.
- a laminate was prepared by thermocompression bonding at a temperature of 39 ° C. and a pressure of 39 kg / cm 2 for 3 seconds.
- the peel strength when the obtained laminate was peeled off at a rate of 0.49 mm / sec was measured using a heated adhesive force measuring device (FCL009, manufactured by Fujicobian Co., Ltd.).
- nickele powder manufactured by Mitsui Kinzoku Co., Ltd., 2020SS
- 7 parts by weight of a binder resin and 60 parts by weight of ether vineol were mixed with 7 parts by weight of a binder resin and 60 parts by weight of ether vineol, followed by kneading with three rolls to prepare a conductive paste.
- the ceramic green sheet produced by the same method as in the evaluation (3-1) was cut into a size of 5 cm square, and the obtained conductive paste was applied by screen printing. Next, a ceramic paste was applied by screen printing to a portion of the ceramic green sheet where the conductive paste was not applied. 100 coated ceramic green sheets were stacked and pressed under a thermocompression bonding condition of a temperature of 70 ° C., a pressure of 150 kg / cm 2, and a duration of 10 minutes to obtain a ceramic green sheet laminate.
- the resulting ceramic green sheet laminate is heated in a nitrogen atmosphere to 450 ° C at a rate of 3 ° C / min, held for 5 hours, and further heated to 1350 ° C at a rate of 5 ° C / min. After heating and holding for 10 hours, a multilayer ceramic capacitor was obtained.
- the glass paste was applied on a glass substrate and dried at 100 ° C for 60 minutes. After drying, a photosensitive resist film was laminated and then exposed at 250 mjZcm 2 through a lmm pitch pattern. Then, it was immersed in a 0.5% aqueous sodium hydrogen carbonate solution, the state of the coating film was observed for 300 seconds, and evaluated according to the following criteria.
- modified polybutylacetal resin obtained using ether terbineol as an organic solvent was dissolved, and the viscosity measured at 25 ° C using an E-type viscometer at a shear rate of 60 s-1 was used. 6.
- a modified polybutylacetal resin solution (vehicle) that was OPa's was prepared.
- a modified polybutyl acetal resin was obtained in the same manner as in Example 1 except that a mixture of ⁇ -butyraldehyde and acetoaldehyde (weight ratio: 6: 1) was used as the aldehyde.
- the resulting modified polybutyl acetal resin had an acetal liability of 72 mol% and a hydroxyl group content of 23 monole%.
- a vehicle and a conductive paste were prepared in the same manner as in Example 1 except that the obtained modified polybutylacetal resin was used.
- a modified polybutyl acetal resin was obtained in the same manner as in Example 1 except that a mixture of ⁇ -butyraldehyde and acetoaldehyde (weight ratio 1: 2) was used as the aldehyde.
- the degree of acetalization of the obtained modified polybutyl acetal resin was 67 mol%, and the amount of hydroxyl groups was 28 mol%.
- Example 1 except that the obtained modified polybutylacetal resin was used.
- a vehicle and a conductive paste were prepared in the same manner as described above.
- a modified polyacetal resin was obtained in the same manner as in Example 1 except that acetoaldehyde was used as the aldehyde.
- the degree of acetalization of the resulting modified polybutyl acetal resin was 69 mol%, and the amount of hydroxyl groups was 26 mol%.
- a vehicle and a conductive paste were prepared in the same manner as in Example 1 except that the obtained modified polybutylacetal resin was used.
- the modified polybutylacetal resin prepared in Test Examples 14 and 14 had an alkali metal and halogen concentration of 200 ppm or less.
- a vehicle and a conductive paste were prepared in the same manner as in Example 1 except that a polybutyral resin not modified with ethylene (Sekisui Chemical Co., Ltd., Eslek B "BH-S") was used as the binder resin. .
- a vehicle and a conductive paste were prepared in the same manner as in Example 1 except that ethyl cellulose (manufactured by Dow, "STD-100") was used as the binder resin.
- Test Examples 1 to 6 The vehicle and the conductive paste prepared in Test Examples 1 to 6 were evaluated by the following methods.
- the obtained vehicle was measured using a ⁇ type viscometer 25.
- Polybutyral resin (Sekisui Chemical Co., Ltd., Eslek B “BM_S”, degree of polymerization 800) 10 parts by weight was added to a mixed solvent of 30 parts by weight of toluene and 15 parts by weight of ethanol, and stirred. Then, 3 parts by weight of dibutyl phthalate was added as a plasticizer and dissolved by stirring. To the obtained resin solution, 100 parts by weight of cerium titanate (“BT-01 (average particle size: 0.3 / im)” manufactured by Sakai Chemical Industry) is added as a ceramic powder, and mixed with a ball mill for 48 hours. A rally composition was obtained.
- BT-01 average particle size: 0.3 / im
- the obtained slurry composition is applied on a release-treated polyester film so that the thickness after drying is about 5 zm, air-dried at room temperature for 1 hour, and a hot-air dryer at 80 ° C for 3 hours. Subsequently, it was dried at 120 ° C. for 2 hours to obtain a ceramic green sheet.
- phase angle of the obtained vehicle was measured using an E-type viscometer under the conditions of 1 ° and stress lOOOPa.
- the conductive paste was screen-printed on a ceramic green sheet by the same method as (1-2), the printed surface was visually observed or observed with a magnifying microscope, and the plate releasability was evaluated according to the following criteria.
- the shear rate of the obtained vehicle was changed from eoos- 1 to eos- 1 at 25 ° C
- the viscosity ⁇ 600 and the shear rate at a shear rate of 600 s- 1 and a shear rate of 60 s were measured using an E-type viscometer.
- the viscosity was changed to 1 and the viscosity ⁇ 60 after 10 seconds was measured, and the ratio ( ⁇ 600 ⁇ 60 / ⁇ 600) was determined.
- a ceramic green sheet prepared in the same manner as in (1-2) was cut into 5 cm square pieces, and 100 sheets of conductive paste were screen-printed on this, stacked at a temperature of 70 ° C and a pressure of 150 kgZcm2 for 10 minutes. Under the following thermocompression bonding conditions to obtain a ceramic green sheet laminate.
- the resulting ceramic green sheet laminate is heated in a nitrogen atmosphere to 450 ° C at a rate of 3 ° C / min, held for 5 hours, and further heated to 1350 ° C at a rate of 5 ° C / min.
- the mixture was heated and maintained for 10 hours to obtain a ceramic sintered body. After cooling this sintered body to normal temperature, divide it in half, observe the state of the sheet near the 50th layer with an electron microscope, observe the presence or absence of delamination between the ceramic layer and the conductive layer, and follow the criteria below. The adhesion was evaluated.
- Table 2 shows that the conductive paste prepared in Test Example 6 using ethyl cellulose as a binder resin, which is conventionally used, is excellent in coating properties, plate separation properties, and shape retention properties, but is inferior in adhesive properties.
- it was prepared in Test Example 5 in which a polybutyral resin was used as a binder resin. Although the conductive paste had excellent adhesiveness, it was inferior in all of coating properties, plate separation properties and shape retention properties.
- the conductive paste prepared in Test Examples 1, 2, 3 or 4 in which the modified polyvinyl acetal was used as the binder resin had excellent adhesiveness, and the conductive paste prepared in Test Example 3 had excellent coating properties.
- the prepared conductive paste was excellent in plate releasability, and the conductive pastes prepared in Test Examples 1 and 2 were excellent in all of coating properties, plate releasability and shape retention.
- inorganic powders such as conductive powders, ceramic powders, and glass powders are excellent in dispersibility, and when these are dispersed to form a paste, extremely excellent coating properties, especially printability, are exhibited. It is possible to provide a binder resin for a coating paste, a conductive paste, a ceramic paste, and a glass paste made of a polyvinyl acetal resin that can be used.
Description
Claims
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KR1020057024665A KR101109809B1 (ko) | 2003-06-26 | 2004-06-28 | 도공 페이스트용 결합제 수지 |
CN2004800174154A CN1809598B (zh) | 2003-06-26 | 2004-06-28 | 涂膏用粘合树脂 |
DE602004024991T DE602004024991D1 (de) | 2003-06-26 | 2004-06-28 | Bindemittel für beschichtungspaste |
EP04746596A EP1637546B1 (en) | 2003-06-26 | 2004-06-28 | Binder resin for coating paste |
US10/561,971 US7569166B2 (en) | 2003-06-26 | 2004-06-28 | Binder resin for coating paste |
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JP2003183187 | 2003-06-26 | ||
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JP2003328163 | 2003-09-19 | ||
JP2003-328162 | 2003-09-19 | ||
JP2003-328163 | 2003-09-19 | ||
JP2003328162A JP4452472B2 (ja) | 2003-09-19 | 2003-09-19 | ガラスペースト用バインダ樹脂組成物及びガラスペースト |
JP2004-079082 | 2004-03-18 | ||
JP2004079082A JP4532945B2 (ja) | 2004-03-18 | 2004-03-18 | スクリーン印刷用導電ペースト |
JP2004-079083 | 2004-03-18 | ||
JP2004079083 | 2004-03-18 | ||
JP2004117062A JP2005303008A (ja) | 2004-04-12 | 2004-04-12 | セラミックペースト及び積層セラミックコンデンサの製造方法 |
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US (1) | US7569166B2 (ja) |
EP (1) | EP1637546B1 (ja) |
KR (1) | KR101109809B1 (ja) |
CN (1) | CN1809598B (ja) |
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JP2006299030A (ja) * | 2005-04-19 | 2006-11-02 | Sekisui Chem Co Ltd | 塗工ペースト用ビヒクル及び塗工ペースト |
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DE602004024991D1 (de) | 2010-02-25 |
KR20060103815A (ko) | 2006-10-04 |
EP1637546B1 (en) | 2010-01-06 |
US20060192180A1 (en) | 2006-08-31 |
EP1637546A1 (en) | 2006-03-22 |
CN1809598A (zh) | 2006-07-26 |
US7569166B2 (en) | 2009-08-04 |
KR101109809B1 (ko) | 2012-03-14 |
CN1809598B (zh) | 2010-05-12 |
EP1637546A4 (en) | 2006-07-05 |
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