WO2019189190A1 - 硬化性組成物、その硬化物およびこれを有する電子部品 - Google Patents
硬化性組成物、その硬化物およびこれを有する電子部品 Download PDFInfo
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- WO2019189190A1 WO2019189190A1 PCT/JP2019/012874 JP2019012874W WO2019189190A1 WO 2019189190 A1 WO2019189190 A1 WO 2019189190A1 JP 2019012874 W JP2019012874 W JP 2019012874W WO 2019189190 A1 WO2019189190 A1 WO 2019189190A1
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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
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0023—Digital printing methods characterised by the inks used
-
- C—CHEMISTRY; METALLURGY
- 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
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- C—CHEMISTRY; METALLURGY
- 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
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
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- C—CHEMISTRY; METALLURGY
- 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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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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
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/285—Permanent coating compositions
- H05K3/287—Photosensitive compositions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
- H05K2201/2054—Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/01—Tools for processing; Objects used during processing
- H05K2203/0104—Tools for processing; Objects used during processing for patterning or coating
- H05K2203/013—Inkjet printing, e.g. for printing insulating material or resist
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3452—Solder masks
Definitions
- the present invention relates to a curable composition, and more particularly to a curable composition applicable to printing by an inkjet method.
- the present invention relates to a cured product of the curable composition and an electronic component having the cured product.
- LEDs light emitting diodes
- LEDs are also widely used as light sources for lighting fixtures.
- the solder resist held as a permanent film on the surface of the printed wiring board is reflected as white, and a liquid crystal display or A method that enhances the backlight effect of LED lighting is adopted. That is, in the case of a white solder resist, it is important to have a high reflectance in addition to characteristics such as heat resistance and insulation required as a resist.
- Patent Document 1 proposes to use a white colorant such as titanium oxide.
- Patent Document 2 an attempt is made to improve the reflectance by adding a fluorescent whitening agent to the curable composition.
- the conductor circuit on the substrate is protected from the adhesion of solder, and the solder resist is applied only to a desired location on the substrate.
- a photographic development method and a screen printing method have been used.
- a photosensitive resin material and a photomask are applied on a substrate, and by exposing the photosensitive resin material, only the photosensitive resin material that is not covered by the photomask is photocured, and the uncured portion is developed. Patterning is performed by dissolving with a liquid and further curing by heating or the like.
- This photographic development method is a complicated method including many steps such as application of the entire surface of a photosensitive resin material to a substrate, alignment of a photomask of a desired shape, exposure, development, heat curing, and equipment investment and materials. Costs such as expenses increase.
- the screen printing method is a method in which a resist ink is applied on a screen (stencil plate) that has been patterned in advance, and the resist ink is transferred to the substrate through the screen by applying pressure with a rubber plate called a squeegee. This method also requires a relatively large number of steps, and it is difficult to say that the printing accuracy is sufficient.
- Patent Documents 3 and 4 development of a printing technique on a solder resist substrate using an ink jet printer is proceeding.
- the ink-jet method is an excellent method that eliminates the complicated work required for many steps required in the photographic development method and the screen printing method, and enables high-precision image formation. Furthermore, the ink jet method has the advantage that the equipment investment is greatly reduced, and consumables such as developer, resist ink, and cleaning solvent can be reduced.
- the ink applied to the solder resist is not limited to the type and color of the solder resist, and the conventional 20 used for screen printing or the like. It is impossible to apply an ink having a viscosity of around 1,000 mPa ⁇ s as it is.
- JP 2016-35042 A International Publication No. 2016/157588 JP 56-66089 A JP-A-56-157089 Patent No. 5968291 Japanese Patent No. 5667080
- the cured coating film obtained from the white curable composition of patent documents 5 and 6 is shown as being able to obtain a favorable result about suppression of reflectance and yellowing, the degree of suppression of yellowing is not necessarily limited. Not enough, there is room for improvement in solder heat resistance and crack resistance during reflow.
- an object of the present invention is to provide a curable composition that has no defects due to the prior art and is excellent in reflectance, suppression of yellowing, solder heat resistance and crack resistance.
- the curable composition of the present invention comprises (A) a white colorant, (B) a photopolymerization initiator, (C) a bifunctional or higher-functional (meth) acrylate monomer having a heterocyclic ring, (D) a thermosetting compound.
- the bifunctional or higher (meth) acrylate monomer having a heterocyclic ring (C) of the curable composition of the present invention is a 5- or 6-membered alicyclic heterocyclic compound having 1 or 2 heteroatoms. It is preferable.
- the curable composition of the present invention preferably further includes (E) a hyperbranched polymer or oligomer.
- the (A) white colorant contained in the curable composition of the present invention preferably has an average particle size of 1 ⁇ m or less.
- the curable composition of the present invention preferably further comprises (F) a fluorescent brightening agent and (G) a diluent that dissolves the fluorescent brightening agent.
- the curable composition of the present invention is preferably used for inkjet printing.
- the cured product of the present invention is obtained by curing any one of the above curable compositions, and the electronic component of the present invention includes this cured product.
- the curable composition of the present invention comprises (A) a white colorant, (B) a photopolymerization initiator, (C) a bifunctional or higher (meth) acrylate monomer having a heterocyclic ring, and (D) a thermosetting compound. ,
- A a white colorant
- B a photopolymerization initiator
- C a bifunctional or higher (meth) acrylate monomer having a heterocyclic ring
- D a thermosetting compound.
- the electronic component having the cured product of the present invention has excellent reflectance due to the cured product, is suppressed in yellowing, and is excellent in solder heat resistance and crack resistance during reflow.
- FIG. 1 is a graph showing conditions for reflow treatment of a curable composition according to an example of the present invention to a cured product (test substrate).
- the curable composition of the present invention comprises (A) a white colorant, (B) a photopolymerization initiator, (C) a bifunctional or higher (meth) acrylate monomer having a heterocyclic ring, and (D) a thermosetting compound. And including.
- the curable composition of the present invention exhibits not only excellent surface curability and coating film hardness but also resistance to cracking during reflow, and exhibits good solder heat resistance.
- the resulting cured coating film (cured product) has excellent insulating properties and improved reflectivity.
- the curable composition of the present invention forms a white coating film with improved reflectance and suppressed yellowing over time. That is, it is possible to suppress yellowing over a long period of time and maintain an excellent reflectance.
- the curable composition of the present invention has a viscosity of 150 mPa ⁇ s or less at room temperature (25 ° C.) and is suitable for use in an ink jet printer.
- the white colorant examples include titanium oxide, zinc oxide, potassium titanate, zirconium oxide, antimony oxide, lead white, zinc sulfide, lead titanate, and the like, since the effect of suppressing discoloration due to heat is high. It is preferable to use titanium oxide.
- the composition of the present invention can be white, and a high reflectance can be obtained.
- the titanium oxide may be a rutile type, anatase type, or ramsdellite type titanium oxide, and may be used alone or in combination of two or more.
- ramsdellite-type titanium oxide is obtained by subjecting ramsdellite-type Li0.5TiO2 to a lithium desorption treatment by chemical oxidation.
- rutile type titanium oxide because it is difficult to cause discoloration due to light irradiation and it is difficult to deteriorate the quality even under severe use environment.
- rutile titanium oxide rutile titanium oxide surface-treated with aluminum oxide such as alumina or silica may be used.
- rutile type titanium oxide A well-known thing can be used as rutile type titanium oxide.
- those produced by any of the production methods can be suitably used.
- Examples of commercially available rutile-type titanium oxides include, for example, Typek R-820, Typek R-830, Typek R-930, Typek R-550, Typek R-630, Typek R-680, Typek R-670, and Typek R.
- anatase type titanium oxide known ones can be used.
- Commercially available anatase-type titanium oxides include TITON A-110, TITON TCA-123E, TITON A-190, TITON A-197, TITON SA-1, TITONNSA-1L (manufactured by Sakai Chemical Industry Co., Ltd.); TA -100, TA-200, TA-300, TA-400, TA-500, TP-2 (manufactured by Fuji Titanium Industry Co., Ltd.); TITANIX JA-1, TITANIX JA-3, TITANIX JA-4, TITANIX JA-5 , TITANIX JA-C (manufactured by Teika Co., Ltd.); KA-10, KA-15, KA-20, KA-30 (manufactured by Titanium Industry Co., Ltd.); Ishihara Sangyo Co., Ltd.) can be used.
- TITON A-110 TITON TCA-
- the average particle diameter (number average diameter (MN)) of the white colorant is preferably 1 ⁇ m or less, and particularly preferably 0.01 ⁇ m to 1 ⁇ m or less.
- MN number average diameter
- the average particle diameter is an average particle diameter (D50) including not only the primary particle diameter but also the secondary particle (aggregate) particle diameter, and was measured by a laser diffraction method. This is the value of D50.
- An example of a measuring apparatus using the laser diffraction method is a Microtrac series manufactured by Nikkiso Co., Ltd.
- the blending amount of the white colorant is preferably in the range of 5 to 80% by mass, more preferably in the range of 10 to 50% by mass with respect to the total amount of the composition.
- the blending ratio is 5% by mass or more, the film-forming property of the curable composition is considered good, and the cured product is hardly warped, and the reflectance of the cured product is improved.
- the content is 80% by mass or less, the ejection property in the case of ink jet printing is improved.
- the (B) photopolymerization initiator is not particularly limited as long as it can polymerize (meth) acrylate by irradiation with energy rays, and a radical polymerization initiator can be used.
- photopolymerization initiator can be used as long as it is a compound that generates radicals by light, laser, electron beam, etc., and initiates a radical polymerization reaction.
- the photo radical polymerization initiator include benzoin and benzoin alkyl ethers such as benzoin, benzoin methyl ether, benzoin ethyl ether, and benzoin isopropyl ether; acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2- Acetophenones such as diethoxy-2-phenylacetophenone and 1,1-dichloroacetophenone; 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino Aminoacetophenones such as -1- (4-morpholinophenyl) -butan-1-one, N, N-dimethylaminoacetophenone; 2-methylanthr
- Examples of commercially available photopolymerization initiators include Omnirad907, Omnirad127, Omnirad 81, Omnirad819, OmniradBDK, OmniradTPO (all manufactured by IGM Resins).
- radical photopolymerization initiators can be used alone or in combination.
- tertiary amines such as N, N-dimethylaminobenzoic acid ethyl ester, N, N-dimethylaminobenzoic acid isoamyl ester, pentyl-4-dimethylaminobenzoate, triethylamine, triethanolamine, etc.
- Photoinitiator aids can be used.
- a titanocene compound such as CGI-784 (manufactured by BASF Japan Ltd.) having absorption in the visible light region can also be added to the radical photopolymerization initiator in order to accelerate the photoreaction.
- the components added to the radical photopolymerization initiator are not limited to these, as long as they absorb light in the ultraviolet or visible light region and radically polymerize unsaturated groups such as (meth) acryloyl groups. These are not limited to photopolymerization initiators and photoinitiator aids, and can be used alone or in combination.
- the blending amount of the photopolymerization initiator is preferably 0.1 to 50% by mass, particularly 1 to 40% by mass in the total amount of the curable composition.
- the curable composition of the present invention includes (C) a bifunctional or higher (meth) acrylate monomer having a heterocyclic ring.
- (meth) acrylate is a term generically referring to acrylate, methacrylate and a mixture thereof, and the same applies to other similar expressions.
- (C) by containing a bifunctional or higher-functional (meth) acrylate monomer having a heterocyclic ring, discoloration (yellowing) is suppressed over a long period of time while maintaining the high reflectance obtained by (A) the white colorant. Is done.
- any cyclic group of either an alicyclic group or an aromatic group having 1 or 2 heteroatoms may be used.
- 1 or 2 (meth) acryloyl groups are directly bonded to each carbon atom or 2 or more carbon atoms of the group, or a linear or branched lower alkylene group (for example, methylene group, ethylene group, n -Propylene group, i-propylene group, n-butylene group, i-butylene group and the like are preferred.
- the carbon to which the (meth) acryloyl group of the cyclic group is not bonded, or the carbon to which the (meth) acryloyl group is bonded is further a linear or branched lower alkyl group (for example, methyl group, ethyl group, n-propyl group, i -Propyl group, n-butyl group, i-butyl group, etc.).
- One or two heteroatoms contained in the heterocyclic ring are two of any one of oxygen, nitrogen, sulfur or any combination thereof, preferably one or two oxygens, particularly two It is oxygen.
- cyclic groups having heteroatoms include alicyclic groups such as azolidine, oxolane, thiolane, piperidine, tetrahydropyran, tetrahydrothiopyran, hexamethyleneimine, hexamethylene oxide, hexamethylene sulfide, dioxane, dioxolane, and azoles.
- the bifunctional or higher (meth) acrylate monomer having (C) a heterocyclic ring of the present invention is a 5- or 6-membered alicyclic heterocyclic compound having 1 or 2 heteroatoms (particularly preferably oxygen).
- the heterocyclic ring constituting a part thereof is preferably a 5- or 6-membered alicyclic heterocyclic group such as tetrahydrofuran, tetrahydropyran, dioxane, or dioxolane, and particularly has a dioxolane ring.
- Bifunctional acrylates such as 2- [5-ethyl-5-[(acryloyloxy) methyl] -1,3-dioxane-2-yl] -2,2-dimethylethyl acrylate, 1,3-dioxane-5, 5-Dimethanol diacrylate is preferred.
- a bifunctional or higher (meth) acrylate monomer having a heterocyclic ring has a viscosity of 500 mPa.s at room temperature (25 ° C.). s or less, particularly 200 to 400 mPa.s. It is preferable that it is s. Thereby, the effect which suppresses the viscosity of the curable composition of this invention low is acquired.
- the blending amount of the bifunctional or higher (meth) acrylate monomer having a heterocyclic ring (C) is preferably 1 to 60% by mass, particularly 4 to 40% by mass, based on the total mass of the curable composition of the present invention. .
- the curability and hardness of the curable composition of the present invention can be stably obtained, and by setting it to 60% by mass or less, an increase in viscosity is suppressed.
- thermosetting compound can be added to the curable composition of this invention.
- Adhesion and heat resistance are improved by adding a thermosetting compound.
- the thermosetting compound (D) used in the present invention includes amino resins such as melamine resins, benzoguanamine resins, melamine derivatives, benzoguanamine derivatives, block isocyanate compounds, cyclocarbonate compounds, and thermosetting compounds having a cyclic (thio) ether group.
- Known thermosetting compounds such as compounds, bismaleimides and carbodiimide resins can be used. Particularly preferred are blocked isocyanate compounds from the viewpoint of excellent storage stability.
- a thermosetting compound may combine 1 type (s) or 2 or more types.
- thermosetting compound having a cyclic (thio) ether group may be a compound having a plurality of either one of the three, four, or five-membered cyclic (thio) ether groups or two types of groups in the molecule.
- a compound having a plurality of epoxy groups in the molecule i.e. a polyfunctional epoxy compound
- a compound having a plurality of oxetanyl groups in the molecule i.e. a polyfunctional oxetane compound
- a compound having a plurality of thioether groups in the molecule i.e. Episulfide resin etc.
- polyfunctional epoxy compound examples include epoxidized vegetable oils such as Adekasizer O-130P, Adekasizer O-180A, Adekasizer D-32, and Adekasizer D-55 manufactured by ADEKA; jER828, jER834 manufactured by Mitsubishi Chemical Corporation; jER1001, jER1004, EHPE3150 manufactured by Daicel Chemical Industries, Epicron 840, Epicron 850, Epicron 1050, Epicron 1050, Epitolon 2055, Epototo YD-011, YD-013, YD-127, YD-128 manufactured by Tohto Kasei Co., Ltd. D. Chemicals manufactured by Dow Chemical Company. E. R. 317, D.E. E. R.
- Brominated epoxy resins such as 714 (both trade names); jER152 and jER154 manufactured by Mitsubishi Chemical Corporation, and D.C. E. N. 431, D.D. E. N. 438, Epicron N-730, Epicron N-770, Epicron N-865 manufactured by DIC, Epototo YDCN-701, YDCN-704 manufactured by Tohto Kasei Co., Ltd. EPPN-201, EOCN-1025, EOCN manufactured by Nippon Kayaku Co., Ltd. -1020, EOCN-104S, RE-306, Sumitomo Epoxy ESCN-195X, ESCN-220, manufactured by Sumitomo Chemical Co., Ltd. E. R.
- Novolak type epoxy resins such as ECN-235 and ECN-299 (both trade names); biphenol novolak type epoxy resins such as NC-3000 and NC-3100 manufactured by Nippon Kayaku; Epicron 830 manufactured by DIC, Mitsubishi Chemical JER807 manufactured by Toto Kasei Co., Ltd. Etototo YDF-170, YDF-175, YDF-2004, etc. (all trade names) bisphenol F type epoxy resin; Toto Kasei Co., Ltd.
- Epototo ST-2004, ST-2007, ST- Hydrogenated bisphenol A type epoxy resin such as 3000 (trade name); jER604 manufactured by Mitsubishi Chemical Co., Ltd., Epotot YH-434 manufactured by Tohto Kasei Co., Ltd., Sumi-epoxy ELM-120 manufactured by Sumitomo Chemical Co., Ltd. ) Glycidylamine type epoxy resin; hydantoin type epoxy resin; Alicyclic epoxy resins GMBH made CELLOXIDE 2021, etc. (all trade names); manufactured by Mitsubishi Chemical Corporation YL-933, Dow Chemical Co. of T. E. N. , EPPN-501, EPPN-502, etc.
- epoxy resin having a dicyclopentadiene skeleton such as HP-7200 and HP-7200H manufactured by DIC
- glycidyl methacrylate copolymer epoxy resin such as CP-50S and CP-50
- the present invention is not limited to these.
- These epoxy resins can be used alone or in combination of two or more.
- novolak-type epoxy resins bixylenol-type epoxy resins, biphenol-type epoxy resins, biphenol novolac-type epoxy resins, naphthalene-type epoxy resins or mixtures thereof are particularly preferable.
- polyfunctional oxetane compound examples include bis [(3-methyl-3-oxetanylmethoxy) methyl] ether, bis [(3-ethyl-3-oxetanylmethoxy) methyl] ether, 1,4-bis [(3- Methyl-3-oxetanylmethoxy) methyl] benzene, 1,4-bis [(3-ethyl-3-oxetanylmethoxy) methyl] benzene, (3-methyl-3-oxetanyl) methyl acrylate, (3-ethyl-3- In addition to polyfunctional oxetanes such as oxetanyl) methyl acrylate, (3-methyl-3-oxetanyl) methyl methacrylate, (3-ethyl-3-oxetanyl) methyl methacrylate and oligomers or copolymers thereof, oxetane alcohol and novolak resin , Poly (p-hydroxy
- Examples of the compound having a plurality of cyclic thioether groups in the molecule include bisphenol A type episulfide resin YL7000 manufactured by Mitsubishi Chemical Corporation. Moreover, episulfide resin etc. which replaced the oxygen atom of the epoxy group of the novolak-type epoxy resin with the sulfur atom using the same synthesis method can be used.
- amino resins such as melamine derivatives and benzoguanamine derivatives
- amino resins include methylol melamine compounds, methylol benzoguanamine compounds, methylol glycoluril compounds, and methylol urea compounds.
- the alkoxymethylated melamine compound, the alkoxymethylated benzoguanamine compound, the alkoxymethylated glycoluril compound and the alkoxymethylated urea compound have the methylol group of the respective methylolmelamine compound, methylolbenzoguanamine compound, methylolglycoluril compound and methylolurea compound. Obtained by conversion to an alkoxymethyl group.
- the type of the alkoxymethyl group is not particularly limited and can be, for example, a methoxymethyl group, an ethoxymethyl group, a propoxymethyl group, a butoxymethyl group, or the like.
- a melamine derivative having a formalin concentration which is friendly to the human body and the environment is preferably 0.2% or less.
- thermosetting compound examples include Cymel 300, 301, 303, 370, 325, 327, 701, 266, 267, 238, 1141, 272, 202, 1156. 1158, 1123, 1170, 1174, UFR65, 300 (all manufactured by Mitsui Cyanamid), Nicalak Mx-750, Mx-032, Mx-270, Mx-280, Mx- 290, Mx-706, Mx-708, Mx-40, Mx-31, Ms-11, Mw-30, Mw-30HM, Mw-390, Mw-100LM, Mw- 750LM (all manufactured by Sanwa Chemical Co., Ltd.).
- Such a thermosetting compound may be used individually by 1 type, and may be used in combination of 2 or more type.
- An isocyanate compound and a blocked isocyanate compound are compounds having a plurality of isocyanate groups or blocked (modified) isocyanate groups in one molecule.
- Examples of such a compound having a plurality of isocyanate groups or blocked isocyanate groups in one molecule include a polyisocyanate compound or a blocked (modified) polyisocyanate compound.
- the blocked isocyanate group is a group in which the isocyanate group is protected by the reaction with the blocking agent and temporarily inactivated, and the blocking agent is dissociated when heated to a predetermined temperature. Produces. It was confirmed that the curability and toughness of the resulting cured product were improved by adding the polyisocyanate compound or the blocked isocyanate compound.
- polyisocyanate compound for example, aromatic polyisocyanate, aliphatic polyisocyanate or alicyclic polyisocyanate is used.
- aromatic polyisocyanate include, for example, 4,4′-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, naphthalene-1,5-diisocyanate, o-xylylene diisocyanate, and m-xylylene diisocyanate and 2,4-tolylene dimer.
- aliphatic polyisocyanate examples include tetramethylene diisocyanate, hexamethylene diisocyanate, methylene diisocyanate, trimethylhexamethylene diisocyanate, 4,4-methylenebis (cyclohexyl isocyanate), and isophorone diisocyanate.
- alicyclic polyisocyanate examples include bicycloheptane triisocyanate.
- adducts, burettes and isocyanurates of the above-mentioned isocyanate compounds can be used.
- the blocked isocyanate compound an addition reaction product of an isocyanate compound and an isocyanate blocking agent is used.
- an isocyanate compound which can react with a blocking agent the above-mentioned polyisocyanate compound etc. are mentioned, for example.
- isocyanate blocking agent examples include phenolic blocking agents such as phenol, cresol, xylenol, chlorophenol and ethylphenol; lactam blocking agents such as ⁇ -caprolactam, ⁇ -palerolactam, ⁇ -butyrolactam and ⁇ -propiolactam; Active methylene blocking agents such as ethyl acetoacetate and acetylacetone; methanol, ethanol, propanol, butanol, amyl alcohol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, propylene glycol monomethyl ether, benzyl Ether, methyl glycolate, butyl glycolate, diacetone alcohol, Alcohol-based blocking agents such as methyl lactate and ethyl lactate; oxime-based blocking agents such as formaldehyde oxime, acetaldoxime, acetoxime
- Examples of product names of those marketed as blocked isocyanate include BI7982 and BI7992 (both manufactured by Baxenden).
- the blending amount of the thermosetting compound is preferably 1 to 30% by mass based on the total amount of the composition.
- the blending amount is 1% by mass or more, sufficient toughness and heat resistance of the coating film can be obtained.
- the use amount ratio of the photocurable compound can be ensured at 30% by mass or less, and the effects of photocurability and thermosetting can be obtained.
- thermosetting compound particularly a blocked isocyanate
- the curable composition of the present invention preferably contains (E) a multi-branched polymer or a multi-branched polymer having an ethylenically unsaturated group (also referred to as “multi-branched compound”).
- a multi-branched oligomer or polymer having an ethylenically unsaturated group is ethylenic in a multi-branched oligomer or polymer (referring to an oligomer or polymer having a plurality of branched chains in one molecule) skeleton.
- the ethylenically unsaturated group is derived from a functional group such as a (meth) acryloyl group, and may have a plurality of types of ethylenically unsaturated groups in one molecule.
- the (meth) acryloyl group is a concept including both an acryloyl group and a methacryloyl group.
- multi-branched oligomer and / or polymer having an ethylenically unsaturated group a compound having a dendrimer structure (dendritic structure) (hereinafter simply referred to as a dendrimer)
- a compound having a hyperbranched structure hereinafter also simply referred to as a hyperbranch (oligomer or polymer)
- oligomer or polymer a compound having a star structure
- oligomer or polymer oligomer or polymer
- the polymer is preferably a compound having a functional group having an ethylenically unsaturated bond, such as a (meth) acryloyl group.
- a dendrimer is a broad term for compounds having a structure in which branches and branches are spread radially.
- the specific kind of dendrimer is not particularly limited, and one or more kinds can be selected from known ones such as amidoamine-based dendrimers, phenyl ether-based dendrimers, and hyperbranched polyethylene glycol.
- the weight-average molecular weight (Mw) of the multi-branched oligomer or polymer is generally 1000 to 20000, preferably 1000 to 8000.
- the weight average molecular weight (Mw) is a molecular weight in terms of polystyrene based on a molecular weight distribution curve based on gel permeation chromatography.
- the number of functional groups having an ethylenically unsaturated bond, particularly the number of (meth) acryloyl groups, in one molecule of the (E) hyperbranched compound of the present invention is preferably 3 or more, particularly 4 to 30. Is preferably selected in such a range that the desired effect of the composition of the present invention is not impaired.
- a composition having a functional group number of 30 or less that has a viscosity of 150 mPa ⁇ s or less at room temperature (25 ° C.) is used.
- the production method of the dendrimer is not particularly limited, and is a divergent method in which a molecule is bonded to a central core molecule for each generation to form a branch, a convergent method in which a branch portion synthesized in advance is bonded to a core molecule, and two or more reaction points
- a known production method such as a method of synthesizing in one step using a monomer ABx having a branched portion having B and a connecting portion having another reaction point A in one molecule can be employed.
- Etercure® 6361-100 manufactured by Eternal Materials
- Doublermer (DM) 2015 manufactured by Double Bond Chemical
- SP1106 manufactured by Miwon® Specialty® Chemical
- Biscote # 1000 Manufactured by Osaka Organic Chemical Industry Co., Ltd.
- dendrimers are available from Iris Biotech, Kanto Chemical, Merk Millipore, QIAGEN, Sigma-Aldrich, Techno Chemical, Double Bond Chemical, Osaka Organic Chemical Industry, Hakuto.
- (E) by using a multi-branched oligomer or polymer having an ethylenically unsaturated group, the adhesion between the curable composition and the substrate is improved, and the cured product is given high hardness. be able to. In addition, plating resistance with severe processing conditions can be improved.
- the hyperbranched oligomer or polymer having an ethylenically unsaturated group has a relatively low viscosity even if the number of functional groups or the amount used is increased, the curable composition is made to have high hardness. Is significant.
- the blending amount of the hyperbranched oligomer or polymer having an ethylenically unsaturated group is preferably 0.1 to 40% by mass relative to the total mass of the curable composition.
- the hardness of a coating film improves by setting it as 0.1 or more, and the viscosity increase of a hardening composition can be suppressed by setting it as 40 mass% or less.
- the curable composition of this invention can also be set as the composition containing (F) fluorescent whitening agent.
- the fluorescent whitening agent is a material having an action of absorbing ultraviolet light and changing it into pale light (fluorescence) in the visible light region, so that the curable composition containing (A) the white colorant of the present invention.
- the reflectance is increased and the whiteness of the cured product of the curable composition is enhanced.
- fluorescent dyes examples include benzoxazole derivatives, coumarin derivatives, styrene biphenyl derivatives, pyrazolone derivatives, bis (triazinylamino) stilbene disulfonic acid derivatives, and the like. Among these, benzoxazole derivatives are preferable.
- the blending amount of the (F) fluorescent whitening agent in the composition of the present invention is 0.01 to 3% by mass, preferably 0.1 1% by mass.
- the curable composition contains a (G) diluent that dissolves the fluorescent whitening agent.
- a reactive diluent, an organic solvent having no reactivity, or both are used.
- “(G) Diluent that dissolves fluorescent whitening agent” means that (F) 0.5% by mass is added to the diluent that dissolves fluorescent whitening agent (G), and the diluent temperature A diluent that forms a state in which the fluorescent brightener particles cannot be visually confirmed at all after stirring for 30 minutes at 40 ° C.
- the fluorescent whitening agent is dissolved as a diluent ( G)
- a diluent By using a diluent, the excellent insulating property of the curable composition of the present invention is ensured.
- the solubility parameter (Sp value) of the diluent that dissolves the optical brightener may be 9.4 or less.
- Examples of (G) diluents that dissolve the optical brightener include linear or branched alkyl (meth) acrylates such as n-butyl acrylate, isooctyl acrylate, isodecyl acrylate, lauryl acrylate, isostearyl acrylate; 1 Alkylene di (meth) acrylates such as 1,9-nonanediol diacrylate and 1,6-hexanediol diacrylate; mono (meth) acrylates of alkylene glycols such as ethylene glycol, methoxytetraethylene glycol, polyethylene glycol, propylene glycol and diethylene glycol Dialkylene glycol di (meth) acrylates such as diethylene glycol diacrylate and dipropylene glycol diacrylate; (2-methyl-2-ethyl-1,3-di Kisoran 4-yl) methyl acrylate, acrylate, and the like having a cyclic group such as is
- vinyl ethers such as diethylene glycol divinyl ether can be used, but from the viewpoint of reaction rate and curability, the above-mentioned radical polymerizable acrylate is preferably used.
- alkyl acrylates or alkylene diacrylates particularly alkylene diacrylates such as 1,6-hexanediol diacrylate and 1,9-nonanediol diacrylate are preferably used.
- the organic solvent that can be used as the (G) diluent that dissolves the optical brightener may be any one as long as it acts as a diluent that dissolves the optical brightener, and is not limited. . *
- ketones such as methyl isopropyl ketone, methyl propyl ketone, methyl ethyl ketone; glycol ethers such as dipropylene glycol dimethyl ether, dipropylene glycol methyl-n-propyl ether, dipropylene glycol methyl ether acetate, ethyl acetate, acetic acid Acetic esters such as butyl, isopropyl acetate, isobutyl acetate, propylene glycol diacetate, dipropylene glycol methyl ether acetate, propylene glycol monomethyl ether acetate, dipropylene glycol monomethyl ether acetate, and alicyclics such as cyclohexanol acetate
- Well-known aliphatic hydrocarbons such as group-containing acetates, n-pentane, n-hexane, diethyl ether, octane, n-decane, etc
- the diluent (G) that dissolves the optical brightener of the curable composition of the present invention preferably contains a diacrylate having an alkylene skeleton or an alkyl acrylate, particularly a diacrylate having an alkylene skeleton.
- the amount of the (G) diluent used for dissolving the optical brightener is preferably in the range of 40 to 70% by mass, particularly in the range of 50 to 65% by mass of the total mass of the curable composition.
- the curable composition of the present invention includes (C) a bifunctional or higher (meth) acrylate monomer having a heterocyclic ring and (E) a multi-branched polymer or oligomer having a (meth) acryloyl group. And a different photocurable compound.
- a photocurable compound a compound having one or more (meth) acryloyl groups in one molecule is used.
- Examples of commercially available (meth) acrylate compounds that can be used as a photocurable compound in the present invention include Neomer DA-600 (manufactured by Sanyo Chemical Industries), Aronix M-309, M-7100, M-309, (Toagosei Co., Ltd.), A-DCP (Shin Nakamura Chemical Co., Ltd.), 1.6HX-A (Kyoei Chemical Co., Ltd.), FA-125 (Hitachi Chemical Co., Ltd.), EPTRA, HDDA (Manufactured by Daicel Cytec Co., Ltd.) and A-NOD-N (manufactured by Shin-Nakamura Chemical Co., Ltd.).
- photocurable compound one type may be used alone, or two or more types may be used in combination.
- monofunctional and bifunctional (meth) acrylate monomers it is preferable to use monofunctional and bifunctional (meth) acrylate monomers. .
- the photocurable compound in the range of 1% by mass to 80% by mass, particularly in the range of 10% by mass to 65% by mass with respect to the total mass of the curable composition. By setting it as said range, the hardness of a curable composition is obtained favorably.
- photocurable compound examples include (meth) acrylates such as isobornyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, glycidyl (meth) acrylate, ⁇ -butyrolactone (meth) acrylate, and ⁇ -butyrolactone (meth) acrylate.
- (meth) acrylates such as isobornyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, glycidyl (meth) acrylate, ⁇ -butyrolactone (meth) acrylate, and ⁇ -butyrolactone (meth) acrylate.
- (Meth) acryloyl such as acryloylmorpholine, 2-hydroxy-3-acryloyloxypropyl (meth) acrylate, hydroxypivalylhydroxypivalate di (meth) acrylate, 1,3-butylene glycol di (meth) Acrylate), 2, methyl-1,3-butylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (Meta) Acrylate, 1,10-decanediol di (meth) acrylate, 3, methyl-1,5-pentanediol di (meth) acrylate, ethoxylated 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) ) Acrylate, propoxylated neopent
- a compound having one or more (meth) acryloyl groups in one molecule and a functional group capable of reacting with isocyanate can be used as the photothermally reactive compound.
- the functional group capable of reacting with isocyanate is a functional group having an active hydrogen atom, and examples thereof include OH group, NH group, NH 2 group, SH group, and COOH group.
- the photothermal reactive compound examples include monofunctional alcohols such as 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 2-hydroxymethyl methacrylate, and pentaerythritol triacrylate; and trimethylolpropane, hydrogenated At least one acrylate of a polyfunctional alcohol such as bisphenol A or an ethylene oxide adduct and a propylene oxide adduct of a polyhydric phenol such as bisphenol A or biphenol; Functional polyurethane acrylate, bisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether or phenol novolac epoxy (Meth) Epoxy acrylates are acrylic acid adduct of the resin; oxetanyl group-containing acrylates such as oxetanyl acrylate, and the like can be used corresponding methacrylate compounds. Acrylic acid can also be used.
- monofunctional alcohols such as 2-hydroxyethyl acrylate, 2-
- Examples of these commercially available products include 4HBA (manufactured by Osaka Organic Chemical Co., Ltd.), 4HBA (manufactured by Nippon Kasei Co., Ltd.), Unidic V-5500, Unidic V-5502, Unidic V-5508 (all of which are DIC).
- the curable composition of the present invention can contain any one or both of the above-mentioned thermosetting compound and photothermal reactive compound in addition to the photocurable compound (A) as an essential component, and (A) It is preferable that each contains a photocurable compound, a thermosetting compound, and a photothermally reactive compound.
- the curable composition of the present invention includes an antifoam / leveling agent, a thixotropy imparting agent / thickening agent, a coupling agent, a dispersant, a flame retardant, a rust inhibitor or an antioxidant, as necessary.
- Additives such as optical brighteners can be included.
- Antifoaming and leveling agents include compounds such as silicone, modified silicone, mineral oil, vegetable oil, aliphatic alcohol, fatty acid, metal soap, fatty acid amide, polyoxyalkylene glycol, polyoxyalkylene alkyl ether, polyoxyalkylene fatty acid ester, etc. Can be used.
- viscosity minerals such as kaolinite, smectite, montmorillonite, bentonite, talc, mica, zeolite, etc., fine silica, silica gel, amorphous inorganic particles, polyamide additives, modified urea additives, Wax-based additives can be used.
- the surface properties of the cured product and the properties of the composition can be adjusted.
- Coupling agents include alkoxy groups such as methoxy, ethoxy, and acetyl, and reactive functional groups such as vinyl, methacryl, acrylic, epoxy, cyclic epoxy, mercapto, amino, diamino, acid anhydride, ureido, sulfide, and isocyanate.
- vinyl silane compounds such as vinyl ethoxylane, vinyl trimethoxysilane, vinyl tris ( ⁇ -methoxyethoxy) silane, ⁇ -methacryloxypropyltrimethoxylane, ⁇ -aminopropyltrimethoxylane, Amino-based silane compounds such as ⁇ - ⁇ - (aminoethyl) ⁇ -aminopropyltrimethoxysilane, N- ⁇ - (aminoethyl) ⁇ -aminopropylmethyldimethoxysilane, ⁇ -ureidopropyltriethoxysilane, Sidoxypropyl trime Epoxy-based silane compounds such as xysilane, ⁇ - (3,4-epoxycyclohexyl) ethyltrimethoxylane, ⁇ -glycidoxypropylmethyldiethoxysilane, mercapto-based silane compounds such as ⁇ -mercaptopropy
- Dispersants include polycarboxylic acid-based, naphthalene sulfonic acid formalin condensation-based, polyethylene glycol, polycarboxylic acid partial alkyl ester-based, polyether-based, polyalkylene polyamine-based polymeric dispersants, alkyl sulfonic acid-based, four Low molecular weight dispersants such as secondary ammonium series, higher alcohol alkylene oxide series, polyhydric alcohol ester series and alkylpolyamine series can be used.
- Flame retardants include hydrated metal such as aluminum hydroxide and magnesium hydroxide, red phosphorus, ammonium phosphate, ammonium carbonate, zinc borate, zinc stannate, molybdenum compound, bromine compound, chlorine compound, phosphate ester Phosphorus-containing polyol, phosphorus-containing amine, melamine cyanurate, melamine compound, triazine compound, guanidine compound, silicon polymer, and the like can be used.
- hydrated metal such as aluminum hydroxide and magnesium hydroxide, red phosphorus, ammonium phosphate, ammonium carbonate, zinc borate, zinc stannate, molybdenum compound, bromine compound, chlorine compound, phosphate ester Phosphorus-containing polyol, phosphorus-containing amine, melamine cyanurate, melamine compound, triazine compound, guanidine compound, silicon polymer, and the like can be used.
- rust inhibitor or antioxidant a sulfur-based antioxidant, a phosphorus-based antioxidant, an aromatic amine-based antioxidant, a phenol-based antioxidant, or the like can be used.
- benzoxazoyl derivatives coumarin derivatives, styrene biphenyl derivatives, pyrazolone derivatives, bis (triazinylamino) stilbene disulfonic acid derivatives, and the like can be used.
- the curable composition of the present invention can be applied to printing by an inkjet method.
- the viscosity be jettable by an ink jet printer.
- Viscosity refers to the viscosity measured according to JIS Z8803. Moreover, it is preferable that the viscosity of said curable composition for inkjet is 150 mPa * s or less at room temperature (25 degreeC). As described above, the viscosity of the ink used in the ink jet printer is preferably about 20 mPa ⁇ s or less at the temperature at the time of application. However, if the viscosity is 150 mPa ⁇ s or less at room temperature, the above conditions can be satisfied by heating before coating or by heating during coating. Therefore, a pattern can be directly printed on a printed wiring board substrate or the like by the curable composition of the present invention.
- the composition layer can be photocured by irradiating the composition layer immediately after printing with 50 mJ / cm 2 to 1000 mJ / cm 2 of light.
- the light irradiation is performed by irradiation with active energy rays such as ultraviolet rays, electron beams, and actinic rays, and preferably by ultraviolet rays.
- the composition layer can be photocured by irradiating with ultraviolet rays.
- Ultraviolet irradiation in an inkjet printer can be performed, for example, by attaching a light source such as a high-pressure mercury lamp, a metal halide lamp, or an ultraviolet LED to the side surface of the print head and performing scanning by moving the print head or the substrate. In this case, printing and ultraviolet irradiation can be performed almost simultaneously.
- a light source such as a high-pressure mercury lamp, a metal halide lamp, or an ultraviolet LED
- the photocurable curable composition is thermally cured by using a known heating means, for example, a heating furnace such as a hot air furnace, an electric furnace, or an infrared induction heating furnace. As heating conditions, it is preferable to heat at 150 to 170 ° C. for 5 to 120 minutes.
- a heating furnace such as a hot air furnace, an electric furnace, or an infrared induction heating furnace.
- the curable composition is suitable for printing by the inkjet method, and an example of the printing target is a printed wiring board, but is not limited thereto.
- the electronic component having the cured product of the present invention is a product excellent in reliability and durability due to the excellent physical characteristics of the cured product.
- an electronic component means a component used in an electronic circuit, and includes passive components such as resistors, capacitors, inductors, connectors, etc. in addition to active components such as printed wiring boards, transistors, light emitting diodes, and laser diodes. It is contained and the cured coating film of the curable composition of this invention has the effect of this invention.
- Examples 1 to 12, Comparative Examples 1 to 4 I. Composition adjustment Each component was mix
- L * 1, a * 1, and b * 1 represent the initial values of L *, a *, and b *, respectively, and L * 2, a * 2, and b * 2 are the values after reflow processing, respectively. Represents L *, a *, b * values.
- ⁇ E * ab is the difference between the initial value and the accelerated deterioration in the L * a * b * color system, and the larger the value, the greater the color change.
- ⁇ ⁇ E * ab is 5 or less ⁇ ⁇ E * ab exceeds 5
- solder heat resistance evaluation> The curable compositions of Examples and Comparative Examples were coated on a copper foil using an applicator, subjected to UV exposure (high pressure mercury lamp 500 mJ / cm 2), heat-treated for 60 minutes in a hot air circulation drying oven at 150 ° C. A cured coating film having a thickness of 20 ⁇ m was obtained. This cured coating film was subjected to a solder heat resistance test by a solder float method in accordance with the method of JIS C-5012. After being immersed in a solder bath at 260 ° C. for 10 seconds, each sample was taken out of the solder layer and naturally cooled, then washed with propylene glycol monomethyl ether acetate and dried. After repeating this test three times, the state of the coating film was visually observed, and then a peeling test using a cellophane adhesive tape was performed. The evaluation results are shown in Table 1.
- the evaluation criteria are as follows.
- Conveyor speed 1.0m / min ⁇ 1 zone (about 35cm) passes in about 20 seconds
- Heat source set temperature A. 210 ° C, B.I. 190 ° C., C.I. ⁇ F. 185 ° C., G.P. 265 ° C., H.P. 285 ° C., I.V. ⁇ J. Cooling process with fan
- the IPCB-25 comb-type electrode B coupon (substrate) was printed with an IJ printer with a film thickness of 40 ⁇ m, pre-cured with UV, and then heat treated for 60 minutes in a 150 ° C. hot-air circulating drying oven. .
- the insulation resistance value after the substrate was exposed for 168 hours while applying a voltage of 100 V in a chamber set to the test conditions of IPC-TM-650 class H was confirmed.
- the evaluation criteria are as follows.
- the evaluation criteria are as follows.
- ⁇ Streaks appear at a position of 1 cm or more at a depth of 3 ⁇ m or less ⁇ Streaks of 1 cm or more are generated at a depth of more than 3 ⁇ m or less than 5 ⁇ m ⁇ 1 cm at a position of a depth of 5 ⁇ m or more More streaks occur
- composition of the present invention was shown to be excellent in all of the injection rate, crack resistance during solder reflow, solder heat resistance, reflectance, and discoloration rate. It can be said that it is extremely preferable for application as a white solder resist that requires these characteristics.
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Abstract
Description
また、特許文献2では硬化性組成物に、蛍光増白剤を添加することにより反射率を向上させる試みがなされている。
スクリーン印刷法は、予めパターン形成されたスクリーン(孔版)上にレジストインキを施し、スキージと呼ばれるゴム板で加圧することによりレジストインキをスクリーンを介して基体に転写させる方法である。この方法も作業が比較的多工程からなる上、印刷精度が十分とは言い難い。
(A)白色着色剤としては、酸化チタン、酸化亜鉛、チタン酸カリウム、酸化ジルコニウム、酸化アンチモン、鉛白、硫化亜鉛、チタン酸鉛等が挙げられるが、熱による変色の抑制効果が高いことから、酸化チタンを用いることが好ましい。(A)白色着色剤を含有させることで、本発明の組成物を白色とすることができ、高い反射率を得ることが可能となる。
(B)光重合開始剤としては、エネルギー線の照射により、(メタ)アクリレートを重合させることが可能なものであれば、特に制限はなく、ラジカル重合開始剤が使用できる。
本発明の硬化性組成物は、(C)複素環を有する2官能以上(メタ)アクリレートモノマーを含む。
本発明の硬化性組成物には、(D)熱硬化性化合物を加えることができる。(D)熱硬化性化合物を加えることにより密着性や耐熱性が向上する。本発明に用いられる(D)熱硬化性化合物としては、メラミン樹脂、ベンゾグアナミン樹脂、メラミン誘導体、ベンゾグアナミン誘導体等のアミノ樹脂、ブロックイソシアネート化合物、シクロカーボネート化合物、環状(チオ)エーテル基を有する熱硬化性化合物、ビスマレイミド、カルボジイミド樹脂等の公知の熱硬化性化合物が使用できる。特に好ましいのは、保存安定性に優れる点より、ブロックイソシアネート化合物である。(D)熱硬化性化合物は1種又は2種以上を組合せてもよい。
本発明の硬化性組成物は、(E)エチレン性不飽和基を有する多分岐状ポリマーまたは多分岐状ポリマー(「多分岐状の化合物」ともいう。)を含むことが好ましい。
本発明の硬化性組成物は(F)蛍光増白剤を含む組成とすることもできる。
(F)蛍光増白剤は、紫外線を吸収して、可視光領域の青白い光(蛍光)に変化させる作用を有する材料であることから、本発明の(A)白色着色剤を含む硬化性組成物に添加することにより、反射率を増大させて、硬化性組成物の硬化物の白さを強調する作用を生ずる。
上記(F)蛍光増白剤を含む場合、硬化性組成物は蛍光増白剤を溶解する(G)希釈剤を含むものとされる。
本発明の蛍光増白剤を溶解する(G)希釈剤としては、反応性希釈剤、反応性を有さない有機溶剤、またはその双方が使用される。本発明において、「蛍光増白剤を溶解する(G)希釈剤」とは、(F)蛍光増白剤を溶解する(G)希釈剤に対して0.5質量%添加し、希釈剤温度40℃にて30分間撹拌後、蛍光増白剤粒子が目視にて全く確認できなくなる状態を形成する希釈剤をいう。
[光硬化性化合物]
本発明の硬化性組成物は、上述の(C)複素環を有する2官能以上(メタ)アクリレートモノマー、および(メタ)アクリロイル基を有する(E)多分岐状ポリマー又はオリゴマーの他に、さらにこれらとは異なる光硬化性化合物を含むことができる。
さらに、本発明では光熱反応性化合物として、1分子中に1個以上の(メタ)アクリロイル基と、イソシアネートと反応しうる官能基とを持つ化合物を使用することが可能である。ここで、イソシアネートと反応しうる官能基とは、活性水素原子を有する官能基であり、例えばOH基、NH基、NH2基、SH基、およびCOOH基が挙げられる。 上記官能基を有する光熱反応性化合物を用いることにより、別途イソシアネート反応性の成分を含まない場合にも、光硬化性の反応のみならず、熱硬化性化合物との熱硬化反応が行われる。
I.組成物の調整
表1に示す割合で各成分を配合し、これをディゾルバーで攪拌した。その後ビーズミルを用いて1mmのジルコニアビーズにて分散を2時間行い、実施例1~12および比較例1~4の硬化性組成物を得た。
上記各組成物について以下に示す特性試験を行った。その結果を表1に示す。
実施例および比較例の硬化性組成物の25℃、100rpmにおける粘度を、コーンプレート型粘度計(東機産業社製TVH-33H)にて測定し、下記基準による評価結果を表1に記載した。
× 150mPa・sを超過
実施例1~12および比較例1~4の硬化性組成物をアプリケーターを使って銅箔上に塗布し、UV露光(高圧水銀灯500mJ/cm2)を行い150℃の熱風循環式乾燥炉にて60分間熱処理を行い、厚さ20μmの硬化塗膜を得た。得られた硬化塗膜の450nm付近の反射率をコニカミノルタ株式会社製、分光測色計CM-2600dを用いて測定し、下記基準による評価結果を表1に記載した。
○ 反射率70%以上、75%未満
× 反射率70%未満
実施例および比較例の硬化性組成物のサンプルをアプリケーターを使って銅箔上に塗布し、UV露光(高圧水銀灯500mJ/cm2)を行い150℃の熱風循環式乾燥炉にて60分間熱処理を行い、厚さ20μmの硬化塗膜を得た。得られた直後の硬化塗膜のL*a*b*を、コニカミノルタ製分光測色計CM-2600dを用いて測定した(初期値の測定)。
× ΔE*abが5を超過
実施例、比較例の硬化性組成物をアプリケーターを使って銅箔上に塗布し、UV露光(高圧水銀灯500mJ/cm2)を行い150℃の熱風循環式乾燥炉にて60分間熱処理を行い、厚さ20μmの硬化塗膜を得た。この硬化塗膜を、JIS C-5012の方法に準拠してはんだフロート法によるはんだ耐熱性試験に付した。260℃のはんだ槽に10秒間浸漬後、各サンプルをはんだ層から取り出して自然冷却した後、プロピレングリコールモノメチルエーテルアセテートで洗浄し、乾燥した。この試験を3回繰返した後、塗膜の状態を目視観察し、その後、セロハン粘着テープによるピーリング試験を行った。評価結果を表1に記載した。
○ 目視観察では変化がないが、ピーリング試験では基板の端にわずかな剥がれが見られた
× 塗膜が完全に剥離した
実施例、比較例の硬化性組成物をアプリケーターを使ってFR-4(基板)上に塗布し、UV露光(高圧水銀灯500mJ/cm2)を行い150℃の熱風循環式乾燥炉にて60分間熱処理を行い、厚さ20μmの硬化塗膜を得た。その後、エイテックテクトロン社製NIS-20-82Cを用いて、下記のコンベア速度および熱源設定温度に従って、事前にリフロー条件と同じ条件で、リフロー炉内の温度を5回測定し(図1参照)、大きな差異が無いことを確認した。その後、同じ条件で、上記で得た試験基板に対し、リフロー処理を3回行い、外観を目視にて観察し、結果を表1に記載した。評価基準は以下のとおりである。
△ 5mm以下のクラックが発生した
× 5mmを超過するクラックが発生した
熱源設定温度:A.210℃、B.190℃、C.~F.185℃、G.265℃、H.285℃、I.~J.ファンによる冷却工程
IPCB-25のクシ型電極Bクーポン(基板)に対し、IJプリンターにて膜厚40μmの印刷を行い、UVにて仮硬化後、150℃の熱風循環式乾燥炉にて60分間熱処理を行った。得られた基板を、IPC-TM-650 class Hの試験条件に設定されたチャンバー内にて電圧100Vを印加しながら168時間曝露した後の絶縁抵抗値を確認した。評価基準は以下のとおりである。
× 5×108Ω未満
各実施例および比較例ごとに、それぞれ用いた蛍光増白剤を希釈剤に添加し、液温40℃下で30分攪拌を行った後、溶け残りを目視にて確認し、蛍光増白剤の希釈剤に対する溶解性を評価した。その結果を表1に示す。評価基準は以下のとおりである。
○ 希釈剤に対し蛍光増白剤が0.5質量%溶解した
△ 希釈剤に対し蛍光増白剤が0.3%重量%溶解した
× 全く溶解しない
JIS K-5101及びK5600に準拠し、最大深さ25μmのグラインドゲージを用いて、粒状痕を観察した。すなわち、グラインドゲージの最も深い側に、各実施例および比較例の調製直後の硬化性組成物を組成物が溝からわずかにあふれる程度に滴下し、スクレーパーを等速・ 等圧に保ったまま溝の深い25μm側から深さ0μm側に向かってインキを掻き取るように、1~2秒間で掃引し、グラインドゲージ上の粒状痕および筋の発生の状態を評価した。この結果を表1に示す。
○ 深さ3μm以下で1cm以上の位置で筋が発生
△ 深さ3μm超過、5μm未満以下の位置で1cm以上の筋が発生
× 深さ5um以上の位置で1cm以上の筋が発生
*2 Omnirad TPO、IGM Resins社製
*3 Omnirad 819、IGM Resins社製
*4 KAYARAD R-604、日本化薬株式会社製
*5 BPE-4、新中村化学工業社製
*6 MEDOL-10、大阪有機化学工業株式会社製
*7 BI 7982、Baxenden Chemicals 社製
*8 ビスコート#1000、大阪有機化学工業株式会社製
*9 4HBA、日本化成株式会社製
*10 PA-100、昭和化学工業株式会社製
*11 Tinopal OB CO、BASFジャパン社製、ベンゾオキサゾール系蛍光増白剤
*12 A-NOD-N、新中村化学工業株式会社製
*13 HDDA、大阪有機化学工業株式会社製
*14 DPGDA、ダイセル・オルネクス株式会社製
*15 BA、東京化成工業株式会社製
*16 PMA、BASF ジャパン社製
*17 EA-1010N、新中村化学工業社製
*18 IRGANOX 1010、BASF ジャパン社製
本発明の組成物は、射出率、はんだリフロー時クラック耐性、はんだ耐熱性、反射率、および変色率性の全てにおいて優れていることが示された。これらの特性を必要とする白色ソルダーレジストとしての適用には極めて好ましいといえる。
Claims (8)
- (A)白色着色剤と、
(B)光重合開始剤と、
(C)複素環を有する2官能以上(メタ)アクリレートモノマーと、
(D)熱硬化性化合物と、
を含むことを特徴とする硬化性組成物。 - 前記(C)複素環を有する2官能以上(メタ)アクリレートモノマーが、1個または2個のヘテロ原子を有する5または6員の脂環式複素環化合物である請求項1に記載の硬化性組成物。
- さらに、(E)エチレン性不飽和基を有する多分岐状ポリマー又はオリゴマーを含む請求項1または2に記載の硬化性組成物。
- 前記(A)白色着色剤の平均粒径が1μm以下である請求項1から3のいずれか1項に記載の硬化性組成物。
- さらに、(F)蛍光増白剤と、前記蛍光増白剤を溶解する(G)希釈剤と、を含むことを特徴とする請求項1から4のいずれか1項に記載の硬化性組成物。
- インクジェット印刷に用いられる請求項1から5のいずれか1項に記載の硬化性組成物。
- 請求項1から6のいずれか1項に記載の硬化性組成物の硬化物。
- 請求項7に記載の硬化物を有する電子部品。
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| CN201980021744.2A CN111902432A (zh) | 2018-03-30 | 2019-03-26 | 固化性组合物、其固化物和具有其的电子部件 |
| US17/043,277 US20210032486A1 (en) | 2018-03-30 | 2019-03-26 | Curable composition, cured product of the same, and electronic component having cured product |
| EP19776498.8A EP3778657A4 (en) | 2018-03-30 | 2019-03-26 | HARDENABLE COMPOSITION, HARDENED PRODUCT THEREOF, AND ELECTRONIC COMPONENT INCLUDING THIS HARDENED PRODUCT |
| JP2020510917A JPWO2019189190A1 (ja) | 2018-03-30 | 2019-03-26 | 硬化性組成物、その硬化物およびこれを有する電子部品 |
| KR1020207029763A KR20200140290A (ko) | 2018-03-30 | 2019-03-26 | 경화성 조성물, 그의 경화물 및 이것을 갖는 전자 부품 |
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| JP2018069385 | 2018-03-30 |
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| US (1) | US20210032486A1 (ja) |
| EP (1) | EP3778657A4 (ja) |
| JP (1) | JPWO2019189190A1 (ja) |
| KR (1) | KR20200140290A (ja) |
| CN (1) | CN111902432A (ja) |
| WO (1) | WO2019189190A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020117586A (ja) * | 2019-01-22 | 2020-08-06 | 株式会社リコー | 硬化型組成物、収容容器、2次元又は3次元の像形成装置、2次元又は3次元の像形成方法、及び硬化物 |
| WO2023120515A1 (ja) * | 2021-12-21 | 2023-06-29 | 積水化学工業株式会社 | 隔壁形成用インクジェット組成物、ledモジュール、ledモジュールの製造方法及びインクジェット組成物 |
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| KR20250024082A (ko) * | 2022-07-19 | 2025-02-18 | 아그파-게바에르트 엔.브이. | 인쇄 회로 기판의 제조를 위한 경화성 잉크젯 조성물 |
| WO2024017926A1 (en) * | 2022-07-19 | 2024-01-25 | Agfa-Gevaert Nv | A curable inkjet composition for the manufacturing of printed circuit boards |
| CN115216178B (zh) * | 2022-08-11 | 2023-11-28 | 西安思摩威新材料有限公司 | 一种oled封装用的油墨组合物及其制备方法 |
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- 2019-03-26 WO PCT/JP2019/012874 patent/WO2019189190A1/ja not_active Ceased
- 2019-03-26 JP JP2020510917A patent/JPWO2019189190A1/ja active Pending
- 2019-03-26 CN CN201980021744.2A patent/CN111902432A/zh active Pending
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| WO2023120515A1 (ja) * | 2021-12-21 | 2023-06-29 | 積水化学工業株式会社 | 隔壁形成用インクジェット組成物、ledモジュール、ledモジュールの製造方法及びインクジェット組成物 |
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| Publication number | Publication date |
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| JPWO2019189190A1 (ja) | 2021-04-01 |
| EP3778657A4 (en) | 2021-12-08 |
| US20210032486A1 (en) | 2021-02-04 |
| EP3778657A1 (en) | 2021-02-17 |
| CN111902432A (zh) | 2020-11-06 |
| KR20200140290A (ko) | 2020-12-15 |
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