WO2013111481A1 - 新規な顔料含有絶縁膜用樹脂組成物及びその利用 - Google Patents
新規な顔料含有絶縁膜用樹脂組成物及びその利用 Download PDFInfo
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- WO2013111481A1 WO2013111481A1 PCT/JP2012/082968 JP2012082968W WO2013111481A1 WO 2013111481 A1 WO2013111481 A1 WO 2013111481A1 JP 2012082968 W JP2012082968 W JP 2012082968W WO 2013111481 A1 WO2013111481 A1 WO 2013111481A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
- C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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- C—CHEMISTRY; METALLURGY
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C—CHEMISTRY; METALLURGY
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
- C08G18/6659—Compounds of group C08G18/42 with compounds of group C08G18/34
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- 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
- 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
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/016—Flame-proofing or flame-retarding 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
- C08K3/02—Elements
- C08K3/04—Carbon
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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
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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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
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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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/16—Inspection; Monitoring; Aligning
- H05K2203/161—Using chemical substances, e.g. colored or fluorescent, for facilitating optical or visual inspection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
Definitions
- the present invention relates to a novel pigment-containing resin composition for an insulating film containing a pigment and its use.
- the pigment-containing insulating film is excellent in tackiness after drying, and the obtained pigment-containing insulating film has flexibility and electrical insulation reliability.
- the present invention relates to a resin composition for a pigment-containing insulating film, a resin composition for a pigment-containing insulating film, a pigment-containing insulating film, and a printed wiring board with a pigment-containing insulating film that are excellent and have a small warp after curing.
- the pigment is a black pigment
- the black insulating film obtained has excellent concealing properties.
- the resulting white insulating film has excellent reflectance.
- Polyimide resins are widely used in electrical and electronic applications because of their excellent heat resistance, electrical insulation reliability, chemical resistance, and mechanical properties. For example, it is used to form insulating films and protective coatings on semiconductor devices, base materials such as flexible circuit boards and integrated circuits, surface protective materials, and further, interlayer insulating films and protective films for fine circuits. .
- a coverlay film obtained by applying an adhesive to a molded body such as a polyimide film has been used.
- solder resist As a surface protective material for a circuit board, there is a case in which a method of forming an insulating film by directly applying a resin composition having an insulating function called a solder resist to a circuit board and curing it.
- This solder resist is excellent in flexibility and electrical insulation reliability as an insulating material, but after the resin composition is applied to a circuit board and the coating film is dried, the coating film becomes sticky (poor tackiness). There were problems that workability, yield, and process contamination occurred.
- thermosetting resin composition having an excellent balance of printability, tackiness, mattness, electrical insulation properties, adhesion to an object to be coated, and the like has been proposed (see, for example, Patent Document 1).
- thermosetting resin composition described in Patent Document 1 is excellent in stickiness after drying and further thermosetting, the stickiness after drying the coating film still has a problem.
- the present inventors have obtained a resin composition for a pigment-containing insulating film containing at least (A) a binder polymer and (B) a crosslinked polymer particle containing a pigment.
- Resin composition for pigment-containing insulating film excellent in tackiness after drying, excellent flexibility and electrical insulation reliability, and low warpage after curing, resin film for pigment-containing insulating film, pigment
- the knowledge which a printed wiring board with a containing insulating film and a pigment containing insulating film is obtained was obtained, and based on these knowledge, this invention was achieved.
- the pigment is a black pigment
- the resulting black insulating film is preferable because it has excellent concealing properties.
- the present invention can solve the above-described problems by a resin composition for a pigment-containing insulating film having the following novel structure.
- the present invention includes the following inventions.
- thermosetting resin for a pigment-containing insulating film according to any one of (1) to (5), further comprising (C) a thermosetting resin.
- the amount of the crosslinked polymer particles containing the (B) pigment is 30 to 100 parts by weight with respect to 100 parts by weight of the (A) binder polymer, according to any one of (1) to (10) A resin composition for a pigment-containing insulating film.
- a resin film for a pigment-containing insulating film obtained by applying the resin composition for a pigment-containing insulating film according to any one of (1) to (14) to the surface of a substrate and then drying it.
- the resin composition for a pigment-containing insulating film according to the present invention has a structure containing at least (A) a binder polymer and (B) a crosslinked polymer particle containing a pigment.
- the obtained pigment-containing insulating film is excellent in flexibility and electrical insulation reliability, and warpage after curing is small. Therefore, the resin composition for a pigment-containing insulating film of the present invention can be used for protective films of various circuit boards and exhibits excellent effects.
- the pigment is a black pigment
- the resulting black insulating film is preferable because it has excellent concealing properties.
- a pigment is a white pigment, since the obtained white insulating film is excellent in a reflectance, it is preferable.
- the pigment-containing insulating film resin composition of the present invention contains at least (A) a binder polymer and (B) crosslinked polymer particles containing a pigment, and contains a pigment-containing insulation. It is a resin composition used for forming a film.
- the present inventors have found that the resin composition for a pigment-containing insulating film of the present invention is excellent in various characteristics, but this is presumed to be due to the following reasons. That is, the crosslinked polymer particles containing the pigment as the component (B) serve to provide unevenness on the surface of the insulating film, so that the pigment obtained is excellent in tackiness after being applied to a substrate and dried and is soft. The flexibility of the contained insulating film is not reduced. Furthermore, since (B) component has a crosslinked structure, it is excellent in heat resistance and chemical resistance.
- the cured film is very soft and fold-resistant. It will be excellent. This is presumed that the (A) component constituting the cured film matrix penetrates into the (B) component so that strong adhesiveness can be obtained at the interface between the (A) component and the (B) component. is doing.
- the pigment when the pigment is a black pigment, the black pigment is covered with the crosslinked polymer particles as an insulator, so that even when added so as to obtain sufficient concealability, the electrical insulation reliability does not decrease.
- an insulating film having excellent electrical insulation reliability when placed in a high temperature and high humidity environment for a long time can be obtained.
- the circuit concealability of the obtained cured film is insufficient and the circuit can be seen through, the secret information contained in the circuit pattern of the printed wiring board is likely to leak. The problem can also be solved.
- the pigment is a white pigment
- the white pigment is covered with soft crosslinked polymer particles, so even if it is added so that sufficient reflectance is obtained, the occurrence of cracks after bending the cured film is suppressed.
- an insulating film having excellent electrical insulation reliability when placed in a high temperature and high humidity environment for a long period of time can be obtained.
- the reflectance of the obtained cured film is insufficient, and when used for a printed wiring board on which the LED chip is mounted, the light from the LED chip is efficiently utilized. The problem that it is difficult to do can also be solved.
- A binder polymer
- B crosslinked polymer particles containing pigment
- C thermosetting resin
- D compound having radical polymerizable group in molecule
- E photopolymerization initiator
- F A method for mixing the phosphorus-based flame retardant, other components, and the pigment-containing insulating film resin composition will be described.
- the (A) binder polymer of the present invention is a polymer that is soluble in an organic solvent and has a weight average molecular weight of 1,000 or more and 1,000,000 or less in terms of polyethylene glycol.
- the organic solvent is not particularly limited.
- sulfoxide solvents such as dimethyl sulfoxide and diethyl sulfoxide
- formamide solvents such as N, N-dimethylformamide and N, N-diethylformamide, N, N-dimethylacetamide
- acetamide solvents such as N, N-diethylacetamide
- pyrrolidone solvents such as N-methyl-2-pyrrolidone and N-vinyl-2-pyrrolidone, hexamethylphosphoramide, and ⁇ -butyrolactone.
- these organic polar solvents can be used in combination with an aromatic hydrocarbon such as xylene or toluene.
- the solubility of the organic solvent which is an index that becomes soluble in the organic solvent, can be measured as parts by weight of the base polymer dissolved in 100 parts by weight of the organic solvent, and is soluble in 100 parts by weight of the organic solvent. If the weight part of the base polymer is 5 parts by weight or more, it can be made soluble in an organic solvent.
- the organic solvent solubility measurement method is not particularly limited. For example, 5 parts by weight of the base polymer is added to 100 parts by weight of the organic solvent, stirred at 40 ° C. for 1 hour, cooled to room temperature, and left for 24 hours or longer. It can be measured by a method for confirming that the solution is uniform without generation of insoluble matter or precipitates.
- the weight average molecular weight of the component (A) of the present invention can be measured, for example, by the following method.
- the weight average molecular weight is 1,000 or less, flexibility and chemical resistance may be lowered, and when the weight average molecular weight is 1,000,000 or more, the viscosity of the resin composition for a pigment-containing insulating film is high. There is a case.
- the component (A) of the present invention is not particularly limited.
- polyurethane resin poly (meth) acrylic resin, polyvinyl resin, polystyrene resin, polyethylene resin, polypropylene resin, polyimide resin, polyamide resin, for example.
- a resin containing a urethane bond in the molecule (a1) is preferable because the flexibility and bending resistance of the pigment-containing insulating film obtained from the resin composition for a pigment-containing insulating film are improved and warpage is reduced.
- resin containing a carboxyl group since the adhesiveness of the pigment containing insulating film obtained from the resin composition for pigment containing insulating films and a base material improves, it is preferable.
- (a3) a resin containing an imide group is preferable because the heat resistance, flame retardancy, and electrical insulation reliability of the pigment-containing insulating film obtained from the resin composition for a pigment-containing insulating film are improved.
- the resin containing a urethane bond (a1) of the present invention contains a repeating unit containing at least one urethane bond in the molecule and has a weight average molecular weight of 1,000 or more in terms of polyethylene glycol, 1, 000,000 or less polymer.
- the affinity is very good when the component (B) has a urethane bond in the molecule, and (a1) the resin containing the urethane bond from the crosslinked polymer particle surface. Soaks into the inside, so that adhesion to a strong matrix is obtained, the flexibility and crease resistance of the pigment-containing insulating film are improved, and warpage is reduced, which is preferable.
- the resin (a1) containing a urethane bond of the present invention can be obtained by any reaction.
- the following general formula (1) the following general formula (1)
- R 1 and X 1 each independently represent a divalent organic group, and n represents an integer of 1 or more
- the diol compound of the present invention is not particularly limited as long as it has the above structure.
- Polyoxyls such as diols, alkylene diols such as 1,4-cyclohexanediol and 1,4-cyclohexanedimethanol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, and random copolymers of tetramethylene glycol and neopentyl glycol Ring-
- the diisocyanate compound of the present invention is not particularly limited as long as it has the above structure.
- the flexibility of the pigment-containing insulating film is excellent.
- reaction with a diisocyanate compound may be performed after mixing 2 or more types of diol compounds, or each diol compound and diisocyanate compound may be made to react separately. Good. Moreover, after making a diol compound and a diisocyanate compound react, you may make the obtained terminal isocyanate compound react with another diol compound, and also make this react with a diisocyanate compound. The same applies when two or more types of diisocyanate compounds are used. In this way, a resin containing a urethane bond in a desired molecule can be produced.
- the reaction temperature between the diol compound and the diisocyanate compound is preferably 40 to 160 ° C., more preferably 60 to 150 ° C. If it is less than 40 ° C., the reaction time becomes too long. If it exceeds 160 ° C., a three-dimensional reaction occurs during the reaction and gelation tends to occur.
- the reaction time can be appropriately selected depending on the scale of the batch and the reaction conditions employed. If necessary, the reaction may be performed in the presence of a catalyst such as a tertiary amine, an alkali metal, an alkaline earth metal, a metal such as tin, zinc, titanium, cobalt, or a metalloid compound.
- the above reaction can be carried out in the absence of a solvent, but in order to control the reaction, it is desirable to carry out the reaction in an organic solvent system.
- organic solvent used here is not specifically limited, For example, what was illustrated above can be used.
- the amount of the organic solvent used in the reaction is desirably such that the solute weight concentration in the reaction solution, that is, the solution concentration is 5% by weight or more and 90% by weight or less.
- the solute weight concentration in the reaction solution is more preferably 10 wt% or more and 80 wt% or less.
- the resin containing a urethane bond (a1) of the present invention may further contain a carboxyl group and / or an imide group.
- a carboxyl group it is preferable because the adhesion between the insulating film obtained from the insulating film resin composition and the substrate is improved.
- an imide group the insulating film obtained from the resin composition for insulating film improves the heat resistance and electrical insulation reliability under high temperature and high humidity conditions. A printed wiring board having excellent reliability can be obtained.
- a resin containing a carboxyl group (a1) containing a urethane bond can be obtained by any reaction.
- a diol compound and a diisocyanate compound the following general formula (4)
- R 2 represents a trivalent organic group
- the compound containing two hydroxyl groups and one carboxyl group of the present invention is not particularly limited as long as it has the above structure.
- the resin containing an imide group (a1) and containing a urethane bond can be obtained by any reaction.
- a diol compound and a diisocyanate compound the following general formula (5)
- the tetracarboxylic dianhydride of the present invention is not particularly limited as long as it has the above structure.
- the resin containing a carboxyl group (a2) of the present invention contains a repeating unit containing at least one carboxyl group in the molecule and has a weight average molecular weight of 1,000 or more in terms of polyethylene glycol, 1, 000,000 or less polymer.
- the (a2) carboxyl group-containing resin of the present invention can be obtained by any reaction.
- a resin containing a urethane bond in addition to the diol compound and the diisocyanate compound by the above method (a1) to obtain a resin containing a urethane bond, It can be obtained by reacting a compound containing two hydroxyl groups and one carboxyl group represented by the general formula (4).
- (meth) acrylic acid is acrylic acid or methacrylic acid.
- a (meth) acrylic acid ester derivative is an acrylic acid ester derivative or a methacrylic acid ester derivative.
- reaction of (meth) acrylic acid and (meth) acrylic ester of the present invention can be carried out by any method.
- (meth) acrylic acid and / or (meth) acrylic ester derivatives are used as solvents. It can be obtained by reacting in the presence of a radical polymerization initiator.
- the (meth) acrylic acid ester derivative of the present invention is not particularly limited.
- (meth) acrylic acid ester derivatives it is particularly preferable to use methyl (meth) acrylate, ethyl (meth) acrylate, and butyl (meth) acrylate from the viewpoint of the flexibility and chemical resistance of the insulating film. .
- radical polymerization initiator examples include azo compounds such as azobisisobutyronitrile, azobis (2-methylbutyronitrile), 2,2′-azobis-2,4-dimethylvaleronitrile, t- Organic peroxides such as butyl hydroperoxide, cumene hydroperoxide, benzoyl peroxide, dicumyl peroxide, di-t-butyl peroxide, persulfates such as potassium persulfate, sodium persulfate, ammonium persulfate, Acid value hydrogen etc. are mentioned, These can be used individually or in combination of 2 or more types.
- azo compounds such as azobisisobutyronitrile, azobis (2-methylbutyronitrile), 2,2′-azobis-2,4-dimethylvaleronitrile
- t- Organic peroxides such as butyl hydroperoxide, cumene hydroperoxide, benzoyl peroxide, dicumyl peroxide, di-
- the amount of the radical polymerization initiator used is preferably 0.001 to 5 parts by weight, more preferably 0.01 to 1 part by weight with respect to 100 parts by weight of the monomer used. When the amount is less than 0.001 part by weight, the reaction hardly proceeds, and when the amount is more than 5 parts by weight, the molecular weight may be lowered.
- the amount of solvent used in the above reaction is preferably such that the solute weight concentration in the reaction solution, that is, the solution concentration is 5 wt% or more and 90 wt% or less, and is 20 wt% or more and 70 wt% or less. More preferably.
- the solution concentration is less than 5%, the polymerization reaction is difficult to occur and the reaction rate is lowered, and a desired structural substance may not be obtained.
- the solution concentration is more than 90% by weight, the reaction solution has a high viscosity. And the reaction may be non-uniform.
- the reaction temperature is preferably 20 to 120 ° C, more preferably 50 to 100 ° C.
- the reaction time can be appropriately selected depending on the scale of the batch and the reaction conditions employed.
- a method of reacting a polyvalent carboxylic acid compound with a functional group-containing resin such as a hydroxyl group, an isocyanate group, an amino group, or an epoxy group can also be mentioned.
- the resin containing (a3) imide group of the present invention contains a repeating unit containing at least one imide group in the molecule, and the weight average molecular weight is 1,000 or more in terms of polyethylene glycol, 1, 000,000 or less polymer.
- the resin containing the (a3) imide group of the present invention can be obtained by any reaction.
- the tetracarboxylic dianhydride of the present invention is not particularly limited as long as it has the above structure.
- the diamino compound of the present invention is not particularly limited as long as it has the above structure.
- Hydroxybiphenyl compounds 3,3′-diamino-4,4′-dihydroxydiphenylmethane, 4,4′-diamino-3,3′-dihydroxydiphenylmethane, 4,4′-diamino-2,2′-dihydroxydiphenylmethane, etc.
- Dihydroxydiphenylmethanes 2,2-bis [3-amino-4-hydroxyphenyl] propa Bis [hydroxyphenyl] propanes such as 2,2-bis [4-amino-3-hydroxyphenyl] propane, 2,2-bis [3-amino-4-hydroxyphenyl] hexafluoropropane, 2,2- Bis [hyhydroxyphenyl] hexafluoropropanes such as bis [3-amino-4-hydroxyphenyl] hexafluoropropane, 3,3′-diamino-4,4′-dihydroxydiphenyl ether, 4,4′-diamino-3 , 3′-dihydroxydiphenyl ether, hydroxydiphenyl ethers such as 4,4′-diamino-2,2′-dihydroxydiphenyl ether, 3,3′-diamino-4,4′-dihydroxydiphenyl sulfone, 4,4′-diamino- 3,
- the above reaction between the tetracarboxylic anhydride and the diamino compound can be carried out by any method, for example, by the following method.
- Method 1 A polyamic acid solution is prepared by adding and reacting a diamino compound in a solution in which tetracarboxylic dianhydride is dispersed or dissolved in an organic solvent. At this time, the total amount of diamino compound added is 0.50 to 1.50 moles per mole of tetracarboxylic dianhydride. After the reaction between the tetracarboxylic dianhydride and the diamino compound is completed, the resulting polyamic acid solution is heated to 100 ° C. or higher and 300 ° C. or lower, more preferably 150 ° C. or higher and 250 ° C. or lower to perform imidization.
- Method 2 A polyamic acid solution is prepared in the same manner as in Method 1 above. Add an imidization catalyst (preferably tertiary amines such as pyridine, picoline, isoquinoline, trimethylamine, triethylamine, tributylamine, etc.) and a dehydrating agent (acetic anhydride, etc.) to this polyamic acid solution at 60 ° C. or higher. The imidization is carried out by heating to 180 ° C. or lower.
- an imidization catalyst preferably tertiary amines such as pyridine, picoline, isoquinoline, trimethylamine, triethylamine, tributylamine, etc.
- acetic anhydride acetic anhydride, etc.
- Method 3 A polyamic acid solution is prepared in the same manner as in Method 1 above.
- the polyamic acid solution is placed in a vacuum oven heated to 100 ° C. or more and 250 ° C. or less, and imidation is performed by drawing a vacuum while heating and drying.
- the crosslinked polymer particles containing the pigment (B) of the present invention are spherical polymer particles having an average particle diameter of 1 to 100 ⁇ m having a crosslinked structure in which the pigment is dispersed.
- the spherical shape may be a true spherical shape or an elliptical shape.
- the average particle size is 1 ⁇ m or less, the viscosity and thixotropy of the pigment-containing insulating film resin composition is increased, and appearance defects may occur due to foaming of the coating film during coating or insufficient leveling.
- the diameter is 100 ⁇ m or more, particles may be exposed on the surface of the pigment-containing insulating film, resulting in poor surface smoothness of the insulating film.
- the average particle size of the component (B) of the present invention is preferably 1 to 50 ⁇ m, more preferably 1 to 20 ⁇ m, so that the coating property of the pigment-containing resin film for insulating film, the smoothness of the insulating film, It is preferable because the insulation reliability is excellent.
- the average particle diameter of the component (B) of the present invention can be measured, for example, as a volume-based median diameter (particle diameter with respect to an integrated distribution value of 50%) by the following method.
- Equipment used LA-950V2 equivalent product manufactured by Horiba, Ltd.
- Measuring method Laser diffraction / scattering method.
- the (A) binder polymer that forms the matrix of the cured film in the component (B) soaks into the interior, so at the interface between the component (A) and the component (B) It is preferable because strong adhesiveness can be obtained.
- the oil absorption amount of the component (B) of the present invention can be measured, for example, as the number of ml of oil per 100 g of particles by the boiled oil method specified in JIS K 5101-13-2.
- the oil absorption amount of the component (B) is preferably 50 ml / 100 g or more because strong adhesiveness can be obtained at the interface between the (A) binder polymer and the (B) component.
- the oil absorption is smaller than 50 ml / 100 g, the penetration of the matrix component into the particles becomes insufficient, the interfacial adhesion is poor, and the flexibility of the pigment-containing insulating film may be lowered.
- the upper limit of the oil absorption amount is not particularly limited, but when the oil absorption amount is larger than 500 ml / 100 g, the viscosity of the pigment-containing insulating film resin composition increases, resulting in insufficient foaming or leveling of the coating film during coating. Appearance defects may occur. Therefore, the oil absorption amount of the component (B) is particularly preferably 50 ml / 100 g or more and 500 ml / 100 g or less.
- Component (B) of the present invention is not particularly limited.
- crosslinked polyurethane particles containing pigment crosslinked acrylic particles, crosslinked alkyl acrylate copolymer particles, crosslinked methacrylic particles, crosslinked alkyl methacrylate copolymer particles, crosslinked polybutadiene.
- examples thereof include particles, crosslinked polyisoprene particles, and crosslinked silicone particles, and these can be used alone or in combination of two or more.
- crosslinked polyurethane particles it is preferable for improving the flexibility of being able to withstand a decrease in warpage of the cured film and repeated bending.
- the production method of the crosslinked polyurethane particles containing the pigment of the present invention is not particularly limited.
- the pigment, the polyol component, and the polyisocyanate component are charged into water, and dispersed and reacted to form polymer particles in water.
- a method of obtaining polymer particles by preparing a suspension, then separating a liquid from the obtained suspension, and solidifying by drying.
- the amount of the pigment contained in the component (B) of the present invention is preferably 1 to 70% by weight, more preferably 1 to 50% by weight, so that the colorability of the pigment-containing insulating film resin composition can be improved. Is preferable.
- the polyol is not particularly limited.
- Diols such as diol, bisphenol A, ethylene oxide adduct of bisphenol A, propylene oxide adduct of bisphenol A, hydrogenated bisphenol A, ethylene oxide adduct of hydrogenated bisphenol A, propylene oxide adduct of hydrogenated bisphenol A, glycerin Trifunctional polyols such as trimethylolpropane and 1,2,6-hexanetriol, tetrafunctional polyols such as pentaerythritol, and hexafunctional polyols such as dipentaerythritol. Al may be used alone or in combinations of two or more.
- the polyisocyanate component of the present invention when a diol is used as the polyol component, it is necessary to use a tri- or higher functional polyisocyanate in order to obtain a crosslinked structure.
- the trifunctional or higher functional polyisocyanate is not particularly limited, and for example, isocyanurate type, biuret type, and adduct type polyisocyanates can be used alone or in combination of two or more.
- isocyanurate type polyisocyanate include trade name Duranate TPA-100 and THA-100 manufactured by Asahi Kasei Chemicals Corporation.
- Examples of the biuret type polyfunctional polyisocyanate include trade name Duranate 24A manufactured by Asahi Kasei Chemicals Corporation.
- adduct type polyfunctional polyisocyanate examples include trade names Duranate P-301-75E and E-402-90T manufactured by Asahi Kasei Chemicals Corporation.
- the diisocyanate compound mentioned above for the resin containing a urethane bond (a1) can be used in combination.
- the content of the component (B) of the present invention is preferably 30 to 100 parts by weight, more preferably 40 to 80 parts by weight, with respect to 100 parts by weight of the component (A).
- the content of the component (B) of the present invention is preferably 30 to 100 parts by weight, more preferably 40 to 80 parts by weight, with respect to 100 parts by weight of the component (A).
- pigments that can be used in the present invention
- various pigments can be used and are not particularly limited. Examples thereof include black pigments, white pigments, yellow pigments, orange pigments, red pigments, purple pigments, blue pigments, green pigments, brown pigments.
- black pigment and a white pigment will be described as examples.
- the black pigment of the present invention is not particularly limited.
- the black pigment may be used as a powder, or may be prepared by using a slurry dispersed in water, a solvent or a varnish.
- the carbon black of the present invention is not particularly limited.
- trade names # 2650, # 2600, # 2350, # 2300, # 1000, # 980, # 970, # 960, # 950, # 900 manufactured by Mitsubishi Chemical Corporation are available.
- # 850, MCF88, MA600, # 750B, # 650B, # 52, # 47, # 45, # 45L, # 44, # 40 # 33, # 32, # 30, # 25, # 20, # 10, # 5, # 95, # 85, # 260, MA77, MA7, MA8, MA11, MA100, MA100R, MA100S, MA230, MA220, MA14, # 4000B, trade names 9H, SEAST9, SEAST manufactured by Tokai Carbon Co., Ltd.
- the white pigment of the present invention is not particularly limited.
- examples thereof include calcium acid, aluminum silicate, and hollow resin particles, and these can be used alone or in combination of two or more.
- titanium oxide it is preferable because high colorability and reflectance can be obtained.
- rutile type titanium oxide it is preferable because of excellent colorability, concealability and stability.
- the rutile-type titanium oxide in the present invention is an oxide of titanium having a tetragonal crystal structure and an inorganic compound represented by the composition formula TiO 2 , and the production method is not particularly limited. It can be produced by a so-called sulfuric acid method in which a titanium solution is hydrolyzed and the resulting hydrous titanium oxide is fired, or a so-called chlorine method in which titanium halide is vapor-phase oxidized.
- a metal such as zinc, potassium, aluminum, lithium, niobium, magnesium, or a compound such as phosphorus can be added as a baking treatment agent in the production process.
- titanium oxide In the case of the method titanium oxide, a compound such as aluminum or potassium may be added as a treating agent during the oxidation process of titanium tetrachloride in the production process.
- a compound such as aluminum or potassium may be added as a treating agent during the oxidation process of titanium tetrachloride in the production process.
- the reflectance and concealment of the cured film obtained from the photosensitive resin composition are good, and discoloration at low temperatures or low reflectance is unlikely to occur. This is preferable.
- rutile-type titanium oxide examples include trade names TYPAKE R-550, R-580, R-630, R-670, R-680, R-780, R-780- manufactured by Ishihara Sangyo Co., Ltd. 2, R-820, R-830, R-850, R-855, R-930, R-980, CR-50, CR-50-2, CR-57, CR-58, CR-58-2, CR-60, CR-60-2, CR-63, CR-67, CR-Super70, CR-80, CR-85, CR-90, CR-90-2, CR-93, CR-95, CR- 953, CR-97, PF-736, PF-737, PF-742, PF-690, PF-691, PF-711, PF-739, PF-740, PC-3, S-305, CR-EL, PT-301, PT-401M, PT 501A, PT-501R, trade names R-3
- the white pigment may be used as a powder, or may be prepared by using a slurry dispersed in water, a solvent or varnish.
- ⁇ Insulating film cross section> A range of 5 mm ⁇ 3 mm of the insulating film was cut out with a cutter knife, and the protective film layer and both surfaces of the insulating film side surface and the base material side surface of the laminated body cut out using an epoxy-based embedding resin and a cover glass After the cover glass layer is formed, a cross section polisher process using an ion beam is performed on the cross section in the thickness direction of the insulating film.
- the pigment when a pigment containing relatively heavy elements such as iron, copper, cobalt, nickel, chromium, manganese, aluminum, bismuth, and titanium is dispersed therein, the pigment is a circle of the component (B). Are observed as dim (eg, gray) or bright (white) micro-regions within the area.
- thermosetting resin of the present invention is a compound containing at least one thermosetting organic group in the molecule.
- (C) component of this invention will not be specifically limited if it is the said structure,
- the component (C) of the present invention is capable of imparting heat resistance to the pigment-containing insulating film, particularly when an epoxy resin is used among the above thermosetting resins, and adhesion to conductors such as metal foils and circuit boards. Is preferable.
- the epoxy resin is a compound containing at least one epoxy group in the molecule and is not particularly limited.
- the bisphenol A type epoxy resin trade names jER828, jER1001, and jER1002 manufactured by Japan Epoxy Resin Co., Ltd. ADEKA Co., Ltd., trade names Adeka Resin EP-4100E, Adeka Resin EP-4300E, Nippon Kayaku Co., Ltd. trade names RE-310S, RE-410S, DIC Corporation trade names Epicron 840S, Epicron 850S, Epicron 1050 , Epicron 7050, Etototo YD-115, Etototo YD-127, Etototo YD-128, manufactured by Toto Kasei Co., Ltd.
- Trade name Epicron EXA-1514, hydrogenated bisphenol A type epoxy resin include trade names jERYX8000, jERYX8034, jERYL7170, and ADEKA Resin EP-4080E, DIC Corporation trade name Epicron EXA-7015, Toto Kasei Co., Ltd. trade name Epototo YD-3000, Epototo YD-4000D, biphenyl type epoxy resin, Japan Epoxy Resin Co., Ltd. Names jERYX4000, jERYL6121H, jERYL6640, jERYL6677, trade names NC-3000 and NC-3000H manufactured by Nippon Kayaku Co., Ltd.
- Epoxy resins include DIC Corporation's trade names Epicron HP-4032, Epicron HP-4700, Epicron HP-4200, and Nippon Kayaku Co., Ltd. trade names NC-70. 00L, phenol novolac type epoxy resin, trade names jER152 and jER154 manufactured by Japan Epoxy Resin Co., Ltd., trade name EPPN-201-L manufactured by Nippon Kayaku Co., Ltd., trade name Epicron N-740 manufactured by DIC Corporation, Epicron N-770, trade name Epototo YDPN-638 manufactured by Toto Kasei Co., Ltd., and cresol novolac type epoxy resin include trade names EOCN-1020, EOCN-102S, EOCN-103S, EOCN-104S manufactured by Nippon Kayaku Co., Ltd.
- DIC Corporation's trade names Epicron N-660, Epicron N-670, Epicron N-680, Epicron N-695, and trisphenol methane type epoxy resin include trade names EPPN-501H manufactured by Nippon Kayaku Co., Ltd. EPPN-501HY, For PPN-502H, dicyclopentadiene type epoxy resin, trade name XD-1000 manufactured by Nippon Kayaku Co., Ltd., for trade name Epicron HP-7200 manufactured by DIC Corporation, and for Japan type epoxy resin, Japan Epoxy Resin Co., Ltd.
- Adeka Resin EPU-73, Adeka Resin EPU-78-11, rubber-modified epoxy resins are trade names Adeka Resin EPR-4023, Adeka Resin EPR-4026, Adeka Resin EPR-1309, and Chelate-modified Epoxy Resins Trade names Adeka Resin EP-49-10 and Adeka Resin EP-49-20 manufactured by the company ADEKA, and heterocyclic-containing epoxy resins include trade names TEPIC made by Nissan Chemical Co., Ltd. Can be used in combination.
- thermosetting resin in the resin composition for pigment containing insulating films of this invention
- phenol resin, amino resin such as a phenol novolak resin, a cresol novolak resin, a naphthalene type phenol resin , Urea resin, melamine, dicyandiamide and the like, and these can be used alone or in combination of two or more.
- the curing accelerator is not particularly limited.
- phosphine compounds such as triphenylphosphine; amine compounds such as tertiary amine, trimethanolamine, triethanolamine and tetraethanolamine; 1,8- Borate compounds such as diaza-bicyclo [5,4,0] -7-undecenium tetraphenylborate, imidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-un Imidazoles such as decylimidazole, 1-benzyl-2-methylimidazole, 2-heptadecylimidazole, 2-isopropylimidazole, 2,4-dimethylimidazole, 2-phenyl-4-methylimidazole; 2-methylimidazoline, 2- Ethyl imidazoline, -Imidazolines such as isopropylimidazoline, 2-phenylimidazoline, 2-unde
- the compound (D) having a radical polymerizable group in the molecule of the present invention is a compound containing in the molecule at least one radical polymerizable group in which a polymerization reaction proceeds by a radical polymerization initiator.
- the radical polymerizable group is preferably an unsaturated double bond.
- the unsaturated double bond is preferably a (meth) acryloyl group or a vinyl group.
- the compound (D) having a radical polymerizable group in the molecule is not particularly limited.
- a compound having a radical polymerizable group in the molecule for example, an acid modification obtained by reacting an epoxy compound with an unsaturated monocarboxylic acid and further adding a saturated or unsaturated polycarboxylic acid anhydride.
- Epoxy acrylate, urethane acrylate which is a polymer of diisocyanate compound with diol compound having ethylenically unsaturated group and / or carboxyl group, (meth) acrylic acid having carboxyl group and copolymerizable double bond (meta )
- Acrylic acrylate obtained by obtaining a copolymer with acrylic ester, etc., and reacting a part of the carboxyl group in the side chain with the epoxy group of a compound having (meth) acrylic group and epoxy group such as glycidyl methacrylate.
- a radically polymerizable group-containing resin such as can also be used.
- Examples of the epoxy acrylate include ZFR series, ZAR series, ZCR series, CCR series, and PCR series manufactured by Nippon Kayaku Co., Ltd., and urethane acrylates include, for example, UXE series manufactured by Nippon Kayaku Co., Ltd. Can be mentioned.
- Examples of the acrylated acrylate include Cyclomer ACA series manufactured by Daicel Cytec Co., Ltd.
- the radical polymerizable group-containing resin may be used alone or in combination with the radical polymerizable monomer.
- the (E) photopolymerization initiator of the present invention is a compound that is activated by energy such as UV and initiates / promotes a reaction of a radical polymerizable group.
- the component (E) of the present invention is not particularly limited as long as it has the above structure.
- the (F) phosphorus flame retardant of the present invention is a compound that contains at least one phosphorus element in the molecule and has an effect of suppressing the combustion of organic matter.
- the component (F) of the present invention is not particularly limited as long as it has the above structure.
- red phosphorus, condensed phosphate ester compounds, cyclic organic phosphorus compounds, phosphazene compounds, phosphorus-containing (meth) acrylate compounds , Phosphorus-containing epoxy compounds, phosphorus-containing polyol compounds, phosphorus-containing amine compounds, ammonium polyphosphate, melamine phosphate, phosphinate, and the like which can be used alone or in combination of two or more.
- the component (F) of the present invention in particular, the use of phosphinates can impart excellent flame retardancy to the pigment-containing insulating film and is difficult from the pigment-containing insulating film. Since there is little bleed out of a fuel agent, since a contact failure and process contamination can be suppressed, it is preferable.
- the phosphinic acid salt of the present invention is a compound represented by the following general formula (7).
- R 3 and R 4 each independently represent a linear or branched alkyl group or aryl group having 1 to 6 carbon atoms, and M represents Mg, Ca, Al, Sb, Sn, Ge, Ti , Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na and K represents a metal selected from at least one selected from the group consisting of 1 to 4).
- the phosphinic acid salt of the present invention is not particularly limited as long as it has the above structure.
- aluminum trisdiethylphosphinate, aluminum trismethylethylphosphinate, aluminum trisdiphenylphosphinate, zinc bisdiethylphosphinate, bismethylethylphosphine examples thereof include zinc oxide, zinc bisdiphenylphosphinate, titanyl bisdiethylphosphinate, titanyl bismethylethylphosphinate, titanyl bisdiphenylphosphinate, and the like. These can be used alone or in combination of two or more. Of these, aluminum trisdiethylphosphinate and aluminum trismethylethylphosphinate are particularly preferable because high flame retardancy can be obtained.
- the content of the component (F) of the present invention is preferably 5 to 100 parts by weight, more preferably 10 to 50 parts by weight, with respect to 100 parts by weight of the component (A). Excellent flame resistance and electrical insulation reliability.
- the amount of the component (F) is less than 5 parts by weight, the flame retardancy may be inferior.
- the amount is more than 100 parts by weight, the folding resistance may be inferior, or when the pigment-containing insulating film resin composition is applied. The coatability deteriorates, and appearance defects may occur due to foaming of the coating film during coating or insufficient leveling.
- filler examples include fine inorganic fillers such as silica, mica, talc, barium sulfate, wollastonite, and calcium carbonate.
- antifoaming agent examples include acrylic compounds, vinyl compounds, and butadiene compounds.
- leveling agent examples include acrylic compounds and vinyl compounds.
- Examples of the colorant include phthalocyanine compounds, azo compounds, and carbon black.
- adhesion assistant also referred to as adhesion-imparting agent
- adhesion-imparting agent examples include silane coupling agents, triazole compounds, tetrazole compounds, and triazine compounds.
- polymerization inhibitor examples include hydroquinone and hydroquinone monomethyl ether.
- a flame retardant may be added in order to obtain a higher flame retardant effect.
- a flame retardant for example, a halogen-containing compound, a metal hydroxide, a melamine compound, or the like can be added.
- the above various additives can be used alone or in combination of two or more.
- the resin composition for a pigment-containing insulating film of the present invention can be obtained by pulverizing and dispersing the components (A) to (F) and other components and mixing them.
- the pulverizing / dispersing method is not particularly limited, and for example, it is performed using a general kneading apparatus such as a bead mill, a ball mill, or a three roll. Among these, in particular, when pulverized / dispersed using a bead mill and confused, the particle size distribution of the component (B) present as fine particles is preferably uniform.
- the above components (A) to (F) and other components, if necessary, a solvent are mixed, mixed with beads, and agitated with a predetermined apparatus to cut off.
- fine particles can be pulverized and dispersed to be mixed.
- beads zirconia, zircon, glass, titania, etc. are used, and beads suitable for the target particle size and application may be used.
- the bead particle size is not particularly limited as long as it is suitable for the target particle size.
- the stirring speed (peripheral speed) varies depending on the apparatus, but stirring may be performed within a range of 100 to 3000 rpm. If the speed is increased, the temperature rises.
- the beads can be separated by filtration to obtain the pigment-containing insulating film resin composition of the present invention.
- the particle diameter of the fine particles can be measured by a method using a gauge defined in JIS K 5600-2-5. Moreover, if a particle size distribution measuring apparatus is used, an average particle diameter, a particle diameter, and a particle size distribution can be measured.
- a pigment-containing insulating film After using the resin composition for pigment-containing insulating film of the present invention directly or after preparing the resin composition solution for pigment-containing insulating film, Thus, a pigment-containing insulating film can be formed.
- the pigment-containing insulating film resin composition or the pigment-containing insulating film resin composition solution is applied to a substrate and dried to remove the organic solvent.
- the substrate can be applied by screen printing, curtain roll, river roll, spray coating, spin coating using a spinner, or the like.
- the coating film (preferably having a thickness of 5 to 100 ⁇ m, particularly 10 to 100 ⁇ m) is dried at 120 ° C. or less, preferably 40 to 100 ° C.
- the coating film obtained above is heat-treated.
- a pigment-containing insulating film having high heat resistance can be obtained.
- the thickness of the pigment-containing insulating film is determined in consideration of the wiring thickness and the like, but is preferably about 2 to 50 ⁇ m.
- the final curing temperature at this time is desired to be able to be cured by heating at a low temperature for the purpose of preventing oxidation of the wiring and the like and not reducing the adhesion between the wiring and the substrate.
- the curing temperature at this time is preferably 100 ° C. or higher and 250 ° C. or lower, more preferably 120 ° C. or higher and 200 ° C. or lower, and particularly preferably 130 ° C. or higher and 180 ° C. or lower. If the final heating temperature is high, the wiring is oxidatively deteriorated, which is not desirable.
- the resin composition for pigment-containing insulating films of the present invention is a photosensitive resin composition containing (D) a compound having a radical polymerizable group in the molecule and (E) a photopolymerization initiator. Describe.
- the pigment-containing insulating film can be formed as follows either directly using the pigment-containing insulating film resin composition of the present invention or after preparing the pigment-containing insulating film resin composition solution.
- the pigment-containing insulating film resin composition or the pigment-containing insulating film resin composition solution is applied to a substrate and dried to remove the organic solvent.
- the substrate can be applied by screen printing, curtain roll, river roll, spray coating, spin coating using a spinner, or the like.
- the coating film (preferably having a thickness of 5 to 100 ⁇ m, particularly 10 to 100 ⁇ m) is dried at 120 ° C. or less, preferably 40 to 100 ° C.
- a negative photomask is placed on the dried coating film and irradiated with actinic rays such as ultraviolet rays, visible rays, and electron beams.
- actinic rays such as ultraviolet rays, visible rays, and electron beams.
- the relief pattern can be obtained by washing out the unexposed portion with a developer using various methods such as shower, paddle, dipping or ultrasonic waves. Since the time until the pattern is exposed varies depending on the spraying pressure and flow rate of the developing device and the temperature of the etching solution, it is desirable to find the optimum device conditions as appropriate.
- This developer may contain a water-soluble organic solvent such as methanol, ethanol, n-propanol, isopropanol, or N-methyl-2-pyrrolidone.
- alkaline compound that gives the alkaline aqueous solution include hydroxides, carbonates, hydrogen carbonates, amine compounds, and the like of alkali metals, alkaline earth metals, or ammonium ions, and specifically sodium hydroxide.
- Ropiruamin aqueous solution with compounds of other long as it exhibits basicity can also be naturally used.
- the concentration of the alkaline compound that can be suitably used in the development step of the resin composition for a pigment-containing insulating film of the present invention is 0.01 to 20% by weight, particularly preferably 0.02 to 10% by weight. Is preferred.
- the temperature of the developer depends on the composition of the pigment-containing insulating film resin composition and the composition of the alkali developer, and is generally 0 ° C. or higher and 80 ° C. or lower, more generally 10 ° C. or higher. It is preferable to use at 60 ° C. or lower.
- the relief pattern formed by the above development process is rinsed to remove unnecessary residues.
- the rinsing liquid include water and acidic aqueous solutions.
- the coating film obtained above is heat-treated.
- a pigment-containing insulating film having high heat resistance can be obtained.
- the thickness of the pigment-containing insulating film is determined in consideration of the wiring thickness and the like, but is preferably about 2 to 50 ⁇ m.
- the final curing temperature at this time is desired to be able to be cured by heating at a low temperature for the purpose of preventing oxidation of the wiring and the like and not reducing the adhesion between the wiring and the substrate.
- the curing temperature at this time is preferably 100 ° C. or higher and 250 ° C. or lower, more preferably 120 ° C. or higher and 200 ° C. or lower, and particularly preferably 130 ° C. or higher and 180 ° C. or lower. If the final heating temperature is high, the wiring is oxidatively deteriorated, which is not desirable.
- the pigment-containing insulating film formed from the resin composition for a pigment-containing insulating film of the present invention is excellent in flexibility and electrical insulation reliability, and has a small warpage of the substrate after curing.
- a pigment-containing insulating film obtained from a resin composition for a pigment-containing insulating film preferably has a thickness of about 2 to 50 ⁇ m and is particularly suitable as an insulating material for a flexible substrate. Furthermore, it is used for various wiring coating protective agents, heat-resistant adhesives, electric wire / cable insulation coatings, and the like.
- the invention of the present application uses the same insulating material even when using the resin film obtained by applying the pigment-containing insulating film resin composition or the pigment-containing insulating film resin composition solution to the substrate surface and drying it. Can be provided.
- the resulting resin solution had a solid content concentration of 50%, a weight average molecular weight of 48,000, and a solid content acid value of 78 mgKOH / g.
- the solid content concentration and the weight average molecular weight were measured by the same method as in Synthesis Example 1, and the acid value was measured by the same method as in Synthesis Example 2.
- the reaction solution was cooled to room temperature, and after separating the solid, it was washed with ion-exchanged water three times and dried at 70 ° C. for 20 hours to obtain crosslinked polymer particles.
- the obtained crosslinked polymer particles had an average particle size of 7 ⁇ m and an oil absorption of 120 ml / 100 g.
- the average particle diameter and oil absorption were measured by the following methods.
- a mixed solution of 0.000 g and 0.0015 g of dibutyltin dilaurate as a polymerization catalyst was dropped from the dropping funnel over 2 hours while keeping the temperature at 60 ° C. After completion of the dropwise addition, the reaction solution was stirred and reacted at 60 ° C. for 4 hours. Next, the reaction solution was cooled to room temperature, and after separating the solid, it was washed with ion-exchanged water three times and dried at 70 ° C. for 20 hours to obtain crosslinked polymer particles. The average particle diameter of the obtained crosslinked polymer particles was 7 ⁇ m, and the oil absorption was 100 ml / 100 g. The average particle diameter and oil absorption were measured by the same method as in Synthesis Example 5.
- the resin composition for a black insulating film was first mixed with a general stirring device equipped with a stirring blade, and then passed twice with a three-roll mill to obtain a uniform solution.
- a general stirring device equipped with a stirring blade
- the following evaluation was carried out by completely defoaming the foam in the solution with a defoaming device.
- the above black insulating film resin composition is 100 mm ⁇ 100 mm in a final dry thickness of 20 ⁇ m on a 25 ⁇ m polyimide film (manufactured by Kaneka Corporation: trade name 25 NPI).
- the film was cast and applied to the area and dried at 80 ° C. for 20 minutes to prepare a coating film after drying the solvent.
- the method for evaluating the tackiness of the coating film was obtained by cutting out the film with the coating film after drying the solvent into 50 mm ⁇ 30 mm strips, overlapping the coating film surfaces with the coating film inside, and adding 300 g to the overlapped portion.
- a black insulating film laminated film having a thickness of 20 ⁇ m is formed on the surface of a polyimide film having a thickness of 25 ⁇ m (Apical 25NPI manufactured by Kaneka Corporation) in the same manner as in the above item ⁇ Preparation of coating film on polyimide film>.
- the method for evaluating the folding resistance of the black insulating film laminated film is to cut the black insulating film laminated film into 50 mm ⁇ 10 mm strips, bend the black insulating film on the outside and bend 180 ° at 25 mm, and load 5 kg on the bent portion. After 3 seconds, the load was removed, and the apex of the bent portion was observed with a microscope.
- the bent portion was opened, and a 5 kg load was again applied for 3 seconds, and then the load was removed to completely open the cured film laminated film.
- the above operation was repeated, and the number of occurrences of cracks in the bent portion was defined as the number of bending times.
- the folding resistance is preferably 5 times or more.
- a DC voltage of 100 V was applied to both terminals of the test piece in an environmental test machine at 85 ° C. and 85% RH, and the insulation resistance value after 1000 hours was measured.
- the resistance value is preferably 1 ⁇ 10 8 or more.
- appearance changes such as migration and dendrite were visually observed.
- ⁇ No change in appearance such as migration and dendrite after 1000 hours.
- ⁇ Some change in appearance such as migration and dendrite after 1000 hours.
- X Appearance changes such as migration and dendrite noticeably after 1000 hours.
- a black insulating film laminated film having a thickness of 20 ⁇ m is formed on the surface of a polyimide film having a thickness of 75 ⁇ m (Apical 75NPI manufactured by Kaneka Corporation) in the same manner as in the above item ⁇ Preparation of coating film on polyimide film>.
- the obtained black insulating film laminated film was floated so that the surface coated with the black insulating film was in contact with the solder bath completely dissolved at 260 ° C. and pulled up 10 seconds later. The operation was performed three times, and the state of the film surface was observed.
- ⁇ There is no abnormality in the coating film.
- X Abnormality such as swelling or peeling occurs in the coating film.
- (V) Warpage A black insulating film laminated film having a thickness of 20 ⁇ m was prepared on the surface of a polyimide film having a thickness of 25 ⁇ m (Apical 25NPI manufactured by Kaneka Corporation) in the same manner as in the above item ⁇ Preparation of coating film on polyimide film>. .
- the obtained black insulating film laminated film was cut into an area of 50 mm ⁇ 50 mm, placed on a smooth base so that the black insulating film was on the upper surface, and the warp height of the film edge was measured.
- a schematic diagram of the measurement site is shown in FIG.
- the warp amount is preferably 5 mm or less. In addition, when rounding cylindrically, it was set as x.
- (Vi) Concealment property A black insulating film laminated film having a thickness of 20 ⁇ m is prepared on the surface of a polyimide film having a thickness of 25 ⁇ m (Apical 25NPI manufactured by Kaneka Corporation) in the same manner as the above item ⁇ Preparation of coating film on polyimide film>. did.
- the produced black insulating film laminated film was placed on a graph paper having 1 mm square cells, and the cells were observed visually from above the test piece. ⁇ : Invisible cells.
- X What can see a grid.
- Comparative Example 2 60.0 parts by weight of a resin containing a urethane bond and a carboxyl group in the molecule which is the binder polymer obtained in Synthesis Example 2, 22.5 parts by weight of an epoxy resin (trade name jER828 manufactured by Japan Epoxy Resin Co., Ltd.), melamine 2.5 parts by weight (trade name fine powdered melamine manufactured by Nissan Chemical Co., Ltd.), 12.0 parts by weight of organic fine particles having a core-shell multilayer structure (manufactured by Ganz Kasei Co., Ltd., trade name Staphyloid AC-3816, average particle size 0. The physical properties were evaluated in the same manner as in Example 1 using 5 ⁇ m). The results are listed in Table 2.
- 1,2-bis (2-methoxyethoxy) ethane which is a solvent in the table is the total amount of the solvent including the solvent contained in the synthesized resin solution.
- the resin composition for a black insulating film was first mixed with a general stirring device equipped with a stirring blade, and then passed twice with a three-roll mill to obtain a uniform solution. When the particle size was measured with a grindometer, all were 10 ⁇ m or less. The following evaluation was carried out by completely defoaming the foam in the solution with a defoaming device.
- spray development was performed for 90 seconds at a discharge pressure of 1.0 kgf / mm 2 using a solution obtained by heating a 1.0 wt% sodium carbonate aqueous solution to 30 ° C.
- the film was thoroughly washed with pure water, and then cured by heating in an oven at 150 ° C. for 30 minutes to prepare a cured film of the resin composition for black insulating film on the polyimide film.
- the resin composition for a black insulating film is 100 mm ⁇ 100 mm so that the final dry thickness becomes 20 ⁇ m on a 25 ⁇ m polyimide film (manufactured by Kaneka Corporation: trade name 25NPI) using a Baker type applicator.
- the film was cast and applied to the area and dried at 80 ° C. for 20 minutes to prepare a coating film after drying the solvent.
- the method for evaluating the tack-free property of the coating film is to cut out the film with the coating film after drying the solvent into 50 mm x 30 mm strips, and the coating film surfaces overlap each other with the coating film on the inside.
- the cured film laminated film of the thing was produced.
- the evaluation method of the bending resistance of the cured film laminated film is that the cured film laminated film is cut into 50 mm ⁇ 10 mm strips, bent at 180 ° at 25 mm with the cured film on the outside, and a load of 5 kg is applied to the bent portion for 3 seconds. After loading, the load was removed, and the apex of the bent portion was observed with a microscope.
- the bent portion was opened, and a 5 kg load was again applied for 3 seconds, and then the load was removed to completely open the cured film laminated film.
- the above operation was repeated, and the number of occurrences of cracks in the bent portion was defined as the number of bending times.
- the folding resistance is preferably 5 times or more.
- a cured film of a resin composition for a black insulating film having a thickness of 20 ⁇ m was prepared on a comb pattern by the same method as the above item ⁇ Preparation of coating film on polyimide film>, and a test piece was prepared.
- a DC voltage of 100 V was applied to both terminals of the test piece in an environmental test machine at 85 ° C. and 85% RH, and the insulation resistance value after 1000 hours was measured.
- the resistance value is preferably 1 ⁇ 10 8 or more.
- appearance changes such as migration and dendrite were visually observed.
- ⁇ No change in appearance such as migration and dendrite after 1000 hours.
- ⁇ Some change in appearance such as migration and dendrite after 1000 hours.
- X Appearance changes such as migration and dendrite noticeably after 1000 hours.
- the warp amount is preferably 5 mm or less. In addition, when rounding cylindrically, it was set as x.
- (Xiii) Concealment property A black insulating film laminated film having a thickness of 20 ⁇ m is produced on the surface of a polyimide film having a thickness of 25 ⁇ m (Apical 25NPI manufactured by Kaneka Corporation) in the same manner as in the above item ⁇ Preparation of a coating film on a polyimide film>. did.
- the produced black insulating film laminated film was placed on a graph paper having 1 mm square cells, and the cells were observed visually from above the test piece.
- ⁇ Invisible cells.
- X What can see a grid.
- the resin composition for a white insulating film was first mixed with a general stirring device equipped with a stirring blade, and then passed twice with a three-roll mill to obtain a uniform solution.
- a general stirring device equipped with a stirring blade
- the following evaluation was carried out by completely defoaming the foam in the solution with a defoaming device.
- the white insulating film resin composition was cast on a 25 ⁇ m polyimide film (manufactured by Kaneka Corporation: product name 25NPI) to an area of 100 mm ⁇ 100 mm so that the final dry thickness was 20 ⁇ m. After coating and drying at 80 ° C. for 20 minutes, a white insulating film was formed on the polyimide film by heating and curing in an oven at 150 ° C. for 30 minutes.
- the obtained white insulating film was evaluated for the following items. The evaluation results are shown in Table 6. The tackiness, crease resistance, electrical insulation reliability, solder heat resistance, and warpage were evaluated in the same manner as in Examples 1 to 6.
- Comparative Example 7 60.0 parts by weight of a resin containing a urethane bond and a carboxyl group in the molecule which is the binder polymer obtained in Synthesis Example 2, 22.5 parts by weight of an epoxy resin (trade name jER828 manufactured by Japan Epoxy Resin Co., Ltd.), melamine 2.5 parts by weight (trade name fine powdered melamine manufactured by Nissan Chemical Co., Ltd.), 12.0 parts by weight of organic fine particles having a core-shell multilayer structure (manufactured by Ganz Kasei Co., Ltd., trade name Staphyloid AC-3816, average particle size 0. The physical properties were evaluated in the same manner as in Example 14 using 5 ⁇ m). The results are listed in Table 6.
- 1,2-bis (2-methoxyethoxy) ethane which is a solvent in the table is the total amount of the solvent including the solvent contained in the synthesized resin solution.
- the resin composition for a white insulating film was first mixed with a general stirring device equipped with a stirring blade, and then passed twice with a three-roll mill to obtain a uniform solution. When the particle size was measured with a grindometer, all were 10 ⁇ m or less. The following evaluation was carried out by completely defoaming the foam in the solution with a defoaming device.
- the white insulating film resin composition was cast on a 25 ⁇ m polyimide film (manufactured by Kaneka Corporation: product name 25NPI) to an area of 100 mm ⁇ 100 mm so that the final dry thickness was 20 ⁇ m. After coating and drying at 80 ° C. for 20 minutes, exposure was performed by irradiating with an ultraviolet ray having an accumulated exposure amount of 300 mJ / cm 2 . Subsequently, spray development was performed for 90 seconds at a discharge pressure of 1.0 kgf / mm 2 using a solution obtained by heating a 1.0 wt% sodium carbonate aqueous solution to 30 ° C. After development, the film was thoroughly washed with pure water, and then cured by heating in an oven at 150 ° C. for 30 minutes to prepare a cured film of the white insulating film resin composition on the polyimide film.
- the resin composition for a pigment-containing insulating film according to the present invention can be widely used in industries in the electric / electronic field.
- it can be used for insulating films and protective coating agents on semiconductor devices, base materials such as flexible circuit boards and integrated circuits, surface protective materials, and interlayer insulating films and protective films for fine circuits.
- base materials such as flexible circuit boards and integrated circuits, surface protective materials, and interlayer insulating films and protective films for fine circuits.
- base materials such as flexible circuit boards and integrated circuits
- surface protective materials such as surface protective materials
- interlayer insulating films and protective films for fine circuits for fine circuits.
- it is not limited to these.
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Abstract
Description
(A)バインダーポリマー、及び
(B)顔料を含有する架橋ポリマー粒子
を含有する顔料含有絶縁膜用樹脂組成物。
(a1)ウレタン結合
(a2)カルボキシル基
(a3)イミド基
(9)前記(B)顔料を含有する架橋ポリマー粒子の平均粒子径が、1~20μmである(1)~(8)のいずれかに記載の顔料含有絶縁膜用樹脂組成物。
本願発明の顔料含有絶縁膜用樹脂組成物とは、少なくとも(A)バインダーポリマー、及び(B)顔料を含有する架橋ポリマー粒子を含有し、顔料含有絶縁膜を形成するために用いられる樹脂組成物である。
本願発明の(A)バインダーポリマーとは、有機溶媒に対して可溶性であり、重量平均分子量が、ポリエチレングリコール換算で1,000以上、1,000,000以下のポリマーである。
使用装置:東ソーHLC-8220GPC相当品
カラム :東ソー TSK gel Super AWM-H(6.0mmI.D.×15cm)×2本
ガードカラム:東ソー TSK guard column Super AW-H
溶離液:30mM LiBr+20mM H3PO4 in DMF
流速:0.6mL/min
カラム温度:40℃
検出条件:RI:ポラリティ(+)、レスポンス(0.5sec)
試料濃度:約5mg/mL
標準品:PEG(ポリエチレングリコール)。
本願発明の(a1)ウレタン結合を含有する樹脂とは、分子内に少なくとも1つのウレタン結合を含有する繰り返し単位を含有している、重量平均分子量が、ポリエチレングリコール換算で1,000以上、1,000,000以下のポリマーである。
で示されるジオール化合物と、下記一般式(2)
で示されるジイソシアネート化合物を反応させることにより、下記一般式(3)
で示されるウレタン結合を含有する繰り返し単位を含有する構造として得られる。
で示される2つの水酸基及び1つのカルボキシル基を含有する化合物を反応させることにより得られる。
で示されるテトラカルボン酸二無水物を反応させることにより得られる。
本願発明の(a2)カルボキシル基を含有する樹脂とは、分子内に少なくとも1つのカルボキシル基を含有する繰り返し単位を含有している、重量平均分子量が、ポリエチレングリコール換算で1,000以上、1,000,000以下のポリマーである。
本願発明の(a3)イミド基を含有する樹脂とは、分子内に少なくとも1つのイミド基を含有する繰り返し単位を含有している、重量平均分子量が、ポリエチレングリコール換算で1,000以上、1,000,000以下のポリマーである。
で示されるジアミノ化合物を反応させることにより得られる。
本願発明の(B)顔料を含有する架橋ポリマー粒子とは、顔料が内部に分散し、架橋構造を有している平均粒子径が1~100μmの球状ポリマー粒子である。ここで、球状とは、真球状であってもよいし、楕円状であってもよい。平均粒子径が1μm以下の場合は、顔料含有絶縁膜用樹脂組成物の粘度やチクソ性が高くなり、塗工時の塗膜の発泡やレベリング不足による外観不良が発生する場合があり、平均粒子径が100μm以上の場合は顔料含有絶縁膜表面に粒子が露出し絶縁膜の表面平滑性不良になる場合がある。
使用装置:株式会社堀場製作所製LA-950V2相当品
測定方式:レーザー回折/散乱式。
本願発明の黒色顔料は、特に限定されないが、例えば、カーボンブラック、ランプブラック、チタンブラック、グラファイト、酸化鉄、酸化銅、酸化コバルト、酸化ニッケル、鉄・クロム複合酸化物、鉄・マンガン複合酸化物、鉄・マンガン・アルミニウム複合酸化物、鉄・コバルト・クロム複合酸化物、鉄・クロム・マンガン複合酸化物、鉄・コバルト・ニッケル・マンガン複合酸化物、銅・クロム複合酸化物、銅・クロム・マンガン複合酸化物、銅・鉄・マンガン複合酸化物、マンガン・ビスマス複合酸化物、マンガン・イットリウム複合酸化物、マンガン・ストロンチウム複合酸化物、アニリン系化合物、アンスラキノン系化合物、ペリレン系化合等を挙げることができ、これらは単独であるいは2種類以上を組み合わせて用いることができる。中でも特にカーボンブラックを用いた場合、高い着色性、隠蔽性が得られるため好ましい。また、黒色顔料は、粉体のまま用いてもよいし、水、溶媒又はワニスに分散させたスラリーを調整し用いてもよい。
本願発明の白色顔料は、特に限定されないが、例えば、酸化チタン、酸化亜鉛、酸化マグネシウム、酸化ジルコニウム、酸化アルミニウム、硫酸バリウム、シリカ、タルク、マイカ、水酸化アルミニウム、ケイ酸カルシウム、ケイ酸アルミニウム、中空樹脂粒子挙げることができ、これらは単独であるいは2種類以上を組み合わせて用いることができる。中でも特に酸化チタンを用いた場合、高い着色性、反射率が得られるため好ましく、更にルチル型酸化チタンを用いた場合、着色性、隠蔽性、安定性に優れるため好ましい。
本願発明の(B)顔料を分散する架橋ポリマー粒子が絶縁膜中に含有され、架橋ポリマー内部に顔料が分散している状態は任意の方法で確認することが可能である。例えば、下記のように、絶縁膜を熱硬化性樹脂で包埋し、厚み方向の断面をイオンビームで研磨して絶縁膜の断面出しを行い、絶縁膜の断面を走査型電子顕微鏡で観察する方法が挙げられる。
絶縁膜を5mm×3mmの範囲をカッターナイフで切り出し、エポキシ系包埋樹脂及びカバーガラスを使用して切り出した積層体の絶縁膜側表面及び積層体の基材側表面の両面に保護膜層及びカバーガラス層を形成した後、絶縁膜の厚み方向の断面をイオンビームによるクロスセクションポリッシャ加工を行う。
使用装置:日本電子株式会社製 SM-09020CP相当品
加工条件:加速電圧 6kV
<絶縁膜の断面観察>
上記の方法で得られた絶縁膜の厚み方向の断面について、走査型電子顕微鏡により観察を行う。
使用装置:株式会社日立ハイテクノロジーズ製 S-3000N相当品
観察条件:加速電圧 15kV
検出器:反射電子検出(組成モード)
倍率:1000倍
ここで、用いた反射電子検出(組成モード)は、観察領域の平均原子番号の差がコントラストに強く反映されるため、重元素が存在する領域が明るく(白く)、軽元素が存在する領域が暗く(黒く)観察される。よって、炭素、水素、酸素、窒素等の比較的軽元素から構成される有機物で、球状である(B)成分は暗い(黒い)円状領域として観察される。一方、その内部に、比較的重元素である鉄、銅、コバルト、ニッケル、クロム、マンガン、アルミニウム、ビスマス、チタン等を含む顔料が分散している場合、当該顔料は上記(B)成分の円状領域内部に、薄暗い(例えば、グレーの)又は明るい(白い)微小領域として観察される。
使用装置:株式会社掘場製作所製 EMAX-7000相当品
分析条件:加速電圧 15kV 積算時間900秒
<(C)熱硬化性樹脂>
本願発明の(C)熱硬化性樹脂とは、分子内に少なくとも1つの熱硬化性の有機基を含有する化合物である。
本願発明の(D)分子内にラジカル重合性基を有する化合物とは、ラジカル重合開始剤により重合反応が進行するラジカル重合性基を分子内に少なくとも1つ含有する化合物である。その中でも上記ラジカル重合性基は、不飽和二重結合であることが好ましい。さらには、上記不飽和二重結合は、(メタ)アクリロイル基、もしくはビニル基であることが好ましい。前記(D)分子内にラジカル重合性基を有する化合物を用いることにより、絶縁膜用感光性樹脂組成物となり、露光、現像により微細加工可能となる。
本願発明の(E)光重合開始剤とは、UVなどのエネルギーによって活性化し、ラジカル重合性基の反応を開始・促進させる化合物である。前記(E)光重合開始剤を(D)分子内にラジカル重合性基を有する化合物と共に用いることにより、絶縁膜用感光性樹脂組成物となり、露光、現像により微細加工可能となる。
本願発明の(F)リン系難燃剤とは、分子内に少なくとも1つのリン元素を含有し、有機物の燃焼を抑制する効果を有する化合物である。
本願発明の顔料含有絶縁膜用樹脂組成物には、さらに必要に応じて充填剤、接着助剤、消泡剤、レベリング剤、着色剤、重合禁止剤等の各種添加剤を加えることができる。
本願発明の顔料含有絶縁膜用樹脂組成物は、上記(A)~(F)成分及びその他成分を粉砕・分散させて混合し、得られることができる。粉砕・分散方法としては、特に限定されるものではないが、例えばビーズミル、ボールミル、3本ロール等の一般的な混練装置を用いて行われる。この中でも、特にビーズミルを用いて粉砕・分散させて混同した場合、微粒子として存在する(B)成分の粒度分布が均一になるため好ましい。
本願発明の顔料含有絶縁膜用樹脂組成物を直接に用いて、又は、顔料含有絶縁膜用樹脂組成物溶液を調製した後に、以下のようにして顔料含有絶縁膜を形成することができる。先ず、上記顔料含有絶縁膜用樹脂組成物、又は、顔料含有絶縁膜用樹脂組成物溶液を基板に塗布し、乾燥して有機溶媒を除去する。基板への塗布はスクリ-ン印刷、カ-テンロ-ル、リバ-スロ-ル、スプレーコーティング、スピンナーを利用した回転塗布等により行うことができる。塗布膜(好ましくは厚み:5~100μm、特に10~100μm)の乾燥は120℃以下、好ましくは40~100℃で行う。
<(A)バインダーポリマー1>
攪拌機、温度計、及び窒素導入管を備えた反応容器に、重合用溶媒としてメチルトリグライム(=1,2-ビス(2-メトキシエトキシ)エタン)25.00gを仕込み、これに、ノルボルネンジイソシアネート5.16g(0.024モル)を仕込み、窒素気流下で攪拌しながら80℃に加温して溶解させた。この溶液に、ポリカーボネートジオール50.00g(0.025モル)(旭化成株式会社製、製品名PCDL T5652、重量平均分子量2000)をメチルトリグライム25.00gに溶解した溶液を1時間かけて添加した。この溶液を5時間80℃で加熱攪拌を行い反応させた。上記反応を行うことで分子内にウレタン結合を含有する樹脂溶液を得た。得られた樹脂溶液の固形分濃度は53%、重量平均分子量は5,600であった。尚、固形分濃度、重量平均分子量は下記の方法で測定した。
JIS K 5601-1-2に従って測定を行った。尚、乾燥条件は170℃×1時間の条件を選択した。
下記条件で測定を行った。
使用装置:東ソーHLC-8220GPC相当品
カラム :東ソー TSK gel Super AWM-H(6.0mmI.D.×15cm)×2本
ガードカラム:東ソー TSK guard column Super AW-H
溶離液:30mM LiBr+20mM H3PO4 in DMF
流速:0.6mL/min
カラム温度:40℃
検出条件:RI:ポラリティ(+)、レスポンス(0.5sec)
試料濃度:約5mg/mL
標準品:PEG(ポリエチレングリコール)。
<(A)バインダーポリマー2>
攪拌機、温度計、及び窒素導入管を備えた反応容器に、重合用溶媒としてメチルトリグライム(=1,2-ビス(2-メトキシエトキシ)エタン)30.00gを仕込み、これに、ノルボルネンジイソシアネート10.31g(0.050モル)を仕込み、窒素気流下で攪拌しながら80℃に加温して溶解させた。この溶液に、ポリカーボネートジオール50.00g(0.025モル)(旭化成株式会社製、製品名PCDL T5652、重量平均分子量2000)及び2,2-ビス(ヒドロキシメチル)ブタン酸3.70g(0.025モル)をメチルトリグライム30.00gに溶解した溶液を1時間かけて添加した。この溶液を5時間80℃で加熱攪拌を行い反応させた。上記反応を行うことで分子内にウレタン結合及びカルボキシル基を含有する樹脂溶液を得た。得られた樹脂溶液の固形分濃度は52%、重量平均分子量は5,600、固形分の酸価は22mgKOH/gであった。尚、固形分濃度、重量平均分子量は合成例1と同様の方法で、酸価は下記の方法で測定した。
JIS K 5601-2-1に従って測定を行った。
<(A)バインダーポリマー3>
攪拌機、温度計、滴下漏斗、及び窒素導入管を備えた反応容器に、重合用溶媒としてメチルトリグライム(=1,2-ビス(2-メトキシエトキシ)エタン)100.00gを仕込み、窒素気流下で攪拌しながら80℃まで昇温した。これに、室温で予め混合しておいた、メタクリル酸12.00g(0.14モル)、メタクリル酸ベンジル28.00g(0.16モル)、メタクリル酸ブチル60.00g(0.42モル)、ラジカル重合開始剤としてアゾビスイソブチロニトリ0.50gを80℃に保温した状態で3時間かけて滴下漏斗から滴下した。滴下終了後、反応溶液を攪拌しながら90℃まで昇温し、反応溶液の温度を90℃に保ちながら更に2時間攪拌を行い反応させた。上記反応を行うことで分子内にカルボキシル基を含有する樹脂溶液を得た。得られた樹脂溶液の固形分濃度は50%、重量平均分子量は48,000、固形分の酸価は78mgKOH/gであった。尚、固形分濃度、重量平均分子量は合成例1と同様の方法で、酸価は合成例2と同様の方法で測定した。
<(A)バインダーポリマー4>
攪拌機、温度計、及び窒素導入管を備えた反応容器に、重合用溶媒としてメチルトリグライム(=1,2-ビス(2-メトキシエトキシ)エタン)130.60gを仕込み、これに、3,3’,4,4’-オキシジフタル酸二無水物31.02g(0.100モル)、ビス[4-(3-アミノフェノキシ)フェニル]スルホン12.92g(0.030モル)、ポリ(テトラメチレン/3-メチルテトラメチレンエーテル)グリコールビス(4-アミノベンゾエート)86.66g(0.070モル)を仕込み、窒素気流下で30分攪拌してポリアミド酸溶液を得た。次いで、この溶液を190℃に加温して2時間反応させた。上記反応を行うことで分子内にイミド基を含有する樹脂溶液を得た。得られた樹脂溶液の固形分濃度は49%、重量平均分子量は28,000であった。尚、固形分濃度、重量平均分子量は合成例1と同様の方法で測定した。
<(B-1)黒色顔料を含有する架橋ポリマー粒子>
攪拌機、温度計、滴下漏斗、及び窒素導入管を備えた1Lセパラブルフラスコにイオン交換水400.00gを仕込み、窒素気流下で攪拌しながら60℃まで昇温した。これに、室温で予め混合しておいた、ポリテトラメチレングリコール94.00g(三菱化学株式会社製、製品名PTMG2000、重量平均分子量2000)、ヘキサメチレンジイソシアネート系イソシアヌレート型ポリイソシアネート56.00g(旭化成ケミカルズ株式会社製、製品名デュラネートTPA-100、NCO含有量:23.1wt%)、黒色顔料としてカーボンブラック20.00g(三菱化学株式会社製 製品名#2600)、溶媒としてメチルエチルケトン50.00g、及び重合触媒としてジブチルスズジラウリレート0.0015gの混合溶液を60℃に保温した状態で2時間かけて滴下漏斗から滴下した。滴下終了後、反応溶液を攪拌しながら60℃で4時間攪拌を行い反応させた。次いで、反応溶液を室温まで冷却し、固体を分離した後、イオン交換水で3回洗浄し、70℃で20時間乾燥して架橋ポリマー粒子を得た。得られた架橋ポリマー粒子の平均粒子径は7μm、吸油量は120ml/100gであった。尚、平均粒子径、吸油量は下記方法で測定した。
使用装置:株式会社堀場製作所製LA-950V2
測定方式:レーザー回折/散乱式。
JIS K 5101-13-2に従って測定を行った。
<(B-2)白色顔料を含有する架橋ポリマー粒子>
攪拌機、温度計、滴下漏斗、及び窒素導入管を備えた1Lセパラブルフラスコにイオン交換水400.00gを仕込み、窒素気流下で攪拌しながら60℃まで昇温した。これに、室温で予め混合しておいた、ポリテトラメチレングリコール94.00g(三菱化学株式会社製、製品名PTMG2000、重量平均分子量2000)、ヘキサメチレンジイソシアネート系イソシアヌレート型ポリイソシアネート56.00g(旭化成ケミカルズ株式会社製、製品名デュラネートTPA-100、NCO含有量:23.1wt%)、白色顔料としてルチル型酸化チタン60.00g(石原産業株式会社製 製品名タイペークCR-60)、溶媒としてメチルエチルケトン50.00g、及び重合触媒としてジブチルスズジラウリレート0.0015gの混合溶液を60℃に保温した状態で2時間かけて滴下漏斗から滴下した。滴下終了後、反応溶液を攪拌しながら60℃で4時間攪拌を行い反応させた。次いで、反応溶液を室温まで冷却し、固体を分離した後、イオン交換水で3回洗浄し、70℃で20時間乾燥して架橋ポリマー粒子を得た。得られた架橋ポリマー粒子の平均粒子径は7μm、吸油量は100ml/100gであった。尚、平均粒子径、吸油量は合成例5と同様の方法で測定した。
<黒色絶縁膜用樹脂組成物の調製>
合成例1~4で得られた(A)バインダーポリマー、(B)成分として、合成例5で得られた(B-1)黒色顔料を含有する架橋ポリマー粒子、(C)熱硬化性樹脂、(F)リン系難燃剤、その他成分、及び有機溶媒を添加して黒色絶縁膜用樹脂組成物を作製した。それぞれの構成原料の樹脂固形分での配合量及び原料の種類を表1に記載する。なお、表中の溶媒である1,2-ビス(2-メトキシエトキシ)エタンは上記合成した樹脂溶液に含まれる溶剤も含めた全溶剤量である。黒色絶縁膜用樹脂組成物ははじめに一般的な攪拌翼のついた攪拌装置で混合し、その後3本ロールミルで2回パスし均一な溶液とした。グラインドメーターにて粒子径を測定したところ、いずれも10μm以下であった。混合溶液を脱泡装置で溶液中の泡を完全に脱泡して下記評価を実施した。
<2>日産化学株式会社製 多官能エポキシ樹脂(トリグリシジルイソシアヌレート)の製品名
<3>クラリアントジャパン株式会社製 ホスフィン酸塩の製品名
<4>日産化学株式会社製 メラミンの製品名
<5>共栄社化学株式会社製 ブタジエン系消泡剤の製品名。
上記黒色絶縁膜用樹脂組成物を、ベーカー式アプリケーターを用いて、25μmのポリイミドフィルム(株式会社カネカ製:商品名25NPI)に最終乾燥厚みが20μmになるように100mm×100mmの面積に流延・塗布し、80℃で20分乾燥した後、150℃のオーブン中で30分加熱硬化させてポリイミドフィルム上に黒色絶縁膜を作製した。
得られた黒色絶縁膜について、以下の項目につき評価を行った。評価結果を表2に記載する。
上記黒色絶縁膜用樹脂組成物を、ベーカー式アプリケーターを用いて、25μmのポリイミドフィルム(株式会社カネカ製:商品名25NPI)に最終乾燥厚みが20μmになるように100mm×100mmの面積に流延・塗布し、80℃で20分乾燥して溶媒乾燥後の塗膜を作製した。塗膜のタック性の評価方法は、作製した溶媒乾燥後の塗膜付きフィルムを50mm×30mmの短冊に切り出して、塗膜を内側にして塗膜面同士を重ね合わせ、重ね合わせた部分に300gの荷重を3秒間のせた後、荷重を取り除き、塗膜面を引き剥がした時の状態を観察した。
○:塗膜同士の貼り付きがなく、塗膜に貼り付き跡も残っていない。
△:塗膜同士が少し貼り付き、塗膜に貼り付き跡が残っている。
×:塗膜同士が完全に貼り付いて引き剥がせない。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製アピカル25NPI)表面に20μm厚みの黒色絶縁膜積層フィルムを作製した。黒色絶縁膜積層フィルムの耐折れ性の評価方法は、黒色絶縁膜積層フィルムを50mm×10mmの短冊に切り出して、黒色絶縁膜を外側にして25mmのところで180°に折り曲げ、折り曲げ部に5kgの荷重を3秒間のせた後、荷重を取り除き、折り曲げ部の頂点を顕微鏡で観察した。顕微鏡観察後、折り曲げ部を開いて、再度5kgの荷重を3秒間乗せた後、荷重を取り除き完全に硬化膜積層フィルムを開いた。上記操作を繰り返し、折り曲げ部にクラックが発生する回数を折り曲げ回数とした。耐折れ性は5回以上であることが好ましい。
フレキシブル銅貼り積層版(電解銅箔の厚み12μm、ポリイミドフィルムは株式会社カネカ製アピカル25NPI、ポリイミド系接着剤で銅箔を接着している)上にライン幅/スペース幅=100μm/100μmの櫛形パターンを作製し、10容量%の硫酸水溶液中に1分間浸漬した後、純水で洗浄し銅箔の表面処理を行った。その後、上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で櫛形パターン上に20μm厚みの黒色絶縁膜を作製し試験片の作成を行った。85℃、85%RHの環境試験機中で試験片の両端子部分に100Vの直流電流を印加し1000時間後の絶縁抵抗値を測定した。抵抗値は1×108以上であることが好ましい。また、1000時間後にマイグレーション、デンドライトなど外観変化の発生を目視にて観察した。
○:1000時間後、マイグレーション、デンドライトなどの外観変化の発生がないもの。
△:1000時間後、僅かにマイグレーション、デンドライトなどの外観変化の発生があるもの。
×:1000時間後、顕著にマイグレーション、デンドライトなどの外観変化の発生があるもの。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、75μm厚みのポリイミドフィルム(株式会社カネカ製アピカル75NPI)表面に20μm厚みの黒色絶縁膜積層フィルムを作製した。得られた黒色絶縁膜積層フィルムを260℃で完全に溶解してある半田浴に黒色絶縁膜が塗工してある面が接する様に浮かべて10秒後に引き上げた。その操作を3回行い、フィルム表面の状態を観察した。
○:塗膜に異常がない。
×:塗膜に膨れや剥がれなどの異常が発生する。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製アピカル25NPI)表面に20μm厚みの黒色絶縁膜積層フィルムを作製した。得られた黒色絶縁膜積層フィルムを50mm×50mmの面積に切り出して平滑な台の上に黒色絶縁膜が上面になるように置き、フィルム端部の反り高さを測定した。測定部位の模式図を図1に示す。ポリイミドフィルム表面での反り量が少ない程、プリント配線板表面での応力が小さくなり、プリント配線板の反り量も低下することになる。反り量は5mm以下であることが好ましい。尚、筒状に丸まる場合は×とした。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製アピカル25NPI)表面に20μm厚みの黒色絶縁膜積層フィルムを作製した。作製した黒色絶縁膜積層フィルムを1mm角のマス目を有する方眼紙の上に置き、目視にて試験片の上からマス目を観察した。
○:マス目が見えないもの。
×:マス目が見えるもの。
実施例1で用いた合成例5の(B-1)黒色顔料を含有する架橋ポリマー粒子に代えて、ポリメタクリル酸メチル系架橋ポリマー粒子(ガンツ化成株式会社製、商品名ガンツパールGM-0801S、平均粒子径8μm)を用い、黒色顔料としてカーボンブラック4重量部(三菱化学株式会社製 製品名#2600)を添加して実施例1と同様の方法で物性評価を行った。その結果を表2に記載する。
合成例2で得られたバインダーポリマーである分子内にウレタン結合及びカルボキシル基を含有する樹脂60.0重量部、エポキシ樹脂22.5重量部(ジャパンエポキシレジン株式会社製の商品名jER828)、メラミン2.5重量部(日産化学株式会社製の商品名微粉メラミン)、コアシェル多層構造をもつ有機微粒子12.0重量部(ガンツ化成株式会社製、商品名スタフィロイドAC-3816、平均粒子径0.5μm)を用いて実施例1と同様の方法で物性評価を行った。その結果を表2に記載する。
実施例1で用いた合成例5の(B-1)黒色顔料を含有する架橋ポリマー粒子に代えて、黒色顔料としてカーボンブラック4重量部(三菱化学株式会社製 製品名#2600)を添加して実施例1と同様の方法で物性評価を行った。その結果を表2に記載する。
<黒色絶縁膜用樹脂組成物の調製>
合成例1~4で得られた(A)バインダーポリマー、(B)成分として、合成例5で得られた(B-1)黒色顔料を含有する架橋ポリマー粒子、(C)熱硬化性樹脂、(D)分子内にラジカル重合性基を有する化合物、(E)光重合開始剤、(F)リン系難燃剤、その他成分、及び有機溶媒を添加して黒色絶縁膜用樹脂組成物を作製した。それぞれの構成原料の樹脂固形分での配合量及び原料の種類を表3に記載する。なお、表中の溶媒である1,2-ビス(2-メトキシエトキシ)エタンは上記合成した樹脂溶液に含まれる溶剤も含めた全溶剤量である。黒色絶縁膜用樹脂組成物ははじめに一般的な攪拌翼のついた攪拌装置で混合し、その後3本ロールミルで2回パスし均一な溶液とした。グラインドメーターにて粒子径を測定したところ、いずれも10μm以下であった。混合溶液を脱泡装置で溶液中の泡を完全に脱泡して下記評価を実施した。
<2>日産化学株式会社製 多官能エポキシ樹脂(トリグリシジルイソシアヌレート)の製品名
<3>クラリアントジャパン株式会社製 ホスフィン酸塩の製品名
<4>日産化学株式会社製 メラミンの製品名
<5>共栄社化学株式会社製 ブタジエン系消泡剤の製品名
<6>日立化成工業株式会社製 分子内にラジカル重合性基を有する化合物(EO変性ビスフェノールAジメタクリレート)の製品名
<7>日本化薬株式会社製、分子内にラジカル重合性基を有する化合物(カルボキシル基及び感光性基含有樹脂の製品名 固形分濃度65%、固形分酸価98mgKOH/g)
<8>BASFジャパン株式会社製 光重合開始剤の製品名。
上記黒色絶縁膜用樹脂組成物を、ベーカー式アプリケーターを用いて、25μmのポリイミドフィルム(株式会社カネカ製:商品名25NPI)に最終乾燥厚みが20μmになるように100mm×100mmの面積に流延・塗布し、80℃で20分乾燥した後、300mJ/cm2の積算露光量の紫外線を照射して露光した。次いで、1.0重量%の炭酸ナトリウム水溶液を30℃に加熱した溶液を用いて、1.0kgf/mm2の吐出圧で90秒スプレー現像を行った。現像後、純水で十分洗浄した後、150℃のオーブン中で30分加熱硬化させてポリイミドフィルム上に黒色絶縁膜用樹脂組成物の硬化膜を作製した。
得られた硬化膜について、以下の項目につき評価を行った。評価結果を表4に記載する。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で得られた硬化膜の表面観察を行い判定した。ただし、露光は、ライン幅/スペース幅=100μm/100μmのネガ型フォトマスクを置いて露光した。
〇:ポリイミドフィルム表面に顕著な線太りや現像残渣無くライン幅/スペース幅=100/100μmの感光パターンが描けているもの。
×:ポリイミドフィルム表面にライン幅/スペース幅=100/100μmの感光パターンが描けていないもの。
上記黒色絶縁膜用樹脂組成物を、ベーカー式アプリケーターを用いて、25μmのポリイミドフィルム(株式会社カネカ製:商品名25NPI)に最終乾燥厚みが20μmになるように100mm×100mmの面積に流延・塗布し、80℃で20分乾燥して溶媒乾燥後の塗膜を作製した。塗膜のタックフリー性の評価方法は、作製した溶媒乾燥後の塗膜付きフィルムを50mm×30mmの短冊に切り出して、塗膜を内側にして塗膜面同士を重ね合わせ、重ね合わせた部分に300gの荷重を3秒間のせた後、荷重を取り除き、塗膜面を引き剥がした時の状態を観察した。
○:塗膜同士の貼り付きがなく、塗膜に貼り付き跡も残っていない。
△:塗膜同士が少し貼り付き、塗膜に貼り付き跡が残っている。
×:塗膜同士が完全に貼り付いて引き剥がせない。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製アピカル25NPI)表面に20μm厚みの黒色絶縁膜用樹脂組成物の硬化膜積層フィルムを作製した。硬化膜積層フィルムの耐折れ性の評価方法は、硬化膜積層フィルムを50mm×10mmの短冊に切り出して、硬化膜を外側にして25mmのところで180°に折り曲げ、折り曲げ部に5kgの荷重を3秒間のせた後、荷重を取り除き、折り曲げ部の頂点を顕微鏡で観察した。顕微鏡観察後、折り曲げ部を開いて、再度5kgの荷重を3秒間乗せた後、荷重を取り除き完全に硬化膜積層フィルムを開いた。上記操作を繰り返し、折り曲げ部にクラックが発生する回数を折り曲げ回数とした。耐折れ性は5回以上であることが好ましい。
フレキシブル銅貼り積層版(電解銅箔の厚み12μm、ポリイミドフィルムは株式会社カネカ製アピカル25NPI、ポリイミド系接着剤で銅箔を接着している)上にライン幅/スペース幅=100μm/100μmの櫛形パターンを作製し、10容量%の硫酸水溶液中に1分間浸漬した後、純水で洗浄し銅箔の表面処理を行った。その後、上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で櫛形パターン上に20μm厚みの黒色絶縁膜用樹脂組成物の硬化膜を作製し試験片の作成を行った。85℃、85%RHの環境試験機中で試験片の両端子部分に100Vの直流電流を印加し1000時間後の絶縁抵抗値を測定した。抵抗値は1×108以上であることが好ましい。また、1000時間後にマイグレーション、デンドライトなど外観変化の発生を目視にて観察した。
○:1000時間後、マイグレーション、デンドライトなどの外観変化の発生がないもの。
△:1000時間後、僅かにマイグレーション、デンドライトなどの外観変化の発生があるもの。
×:1000時間後、顕著にマイグレーション、デンドライトなどの外観変化の発生があるもの。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、75μm厚みのポリイミドフィルム(株式会社カネカ製アピカル75NPI)表面に20μm厚みの黒色絶縁膜用樹脂組成物の硬化膜積層フィルムを作製した。得られた硬化膜積層フィルムを260℃で完全に溶解してある半田浴に黒色絶縁膜用樹脂組成物の硬化膜が塗工してある面が接する様に浮かべて10秒後に引き上げた。その操作を3回行い、フィルム表面の状態を観察した。
○:塗膜に異常がない。
×:塗膜に膨れや剥がれなどの異常が発生する。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製アピカル25NPI)表面に20μm厚みの黒色絶縁膜用樹脂組成物の硬化膜積層フィルムを作製した。得られた硬化膜積層フィルムを50mm×50mmの面積に切り出して平滑な台の上に塗布膜が上面になるように置き、フィルム端部の反り高さを測定した。測定部位の模式図を図1に示す。ポリイミドフィルム表面での反り量が少ない程、プリント配線板表面での応力が小さくなり、プリント配線板の反り量も低下することになる。反り量は5mm以下であることが好ましい。尚、筒状に丸まる場合は×とした。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製アピカル25NPI)表面に20μm厚みの黒色絶縁膜積層フィルムを作製した。作製した黒色絶縁膜積層フィルムを1mm角のマス目を有する方眼紙の上に置き、目視にて試験片の上からマス目を観察した。
○:マス目が見えないもの。
×:マス目が見えるもの。
プラスチック材料の燃焼性試験規格UL94VTMに従い、以下のように燃焼性試験を行った。上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製:商品名アピカル25NPI)両面に20μm厚みの黒色絶縁膜用樹脂組成物硬化膜積層フィルムを作製した。 上記作製したサンプルを寸法:50mm幅×200mm長さ×75μm 厚み(ポリイミドフィルムの厚みを含む)に切り出し、125mmの部分に標線を入れ、直径約13mmの筒状に丸め、標線よりも上の重ね合わせ部分(75mmの箇所)、及び、上部に隙間がないようにPIテープを貼り、燃焼性試験用の筒を20本用意した。 そのうち10本は(1)23℃/50%相対湿度/48時間で処理し、残りの10本は(2)70℃で168時間処理後無水塩化カルシウム入りデシケーターで4時間以上冷却した。これらのサンプルの上部をクランプで止めて垂直に固定し、サンプル下部にバーナーの炎を3秒間近づけて着火する。3秒間経過したらバーナーの炎を遠ざけて、サンプルの炎や燃焼が何秒後に消えるか測定する。
○:各条件((1)、(2))につき、サンプルからバーナーの炎を遠ざけてから平均(10本の平均)で10秒以内、最高で10秒以内に炎や燃焼が停止し自己消火し、かつ、評線まで燃焼が達していないもの。
×:1本でも10秒以内に消火しないサンプルがあったり、炎が評線以上のところまで上昇して燃焼するもの。
実施例7で用いた合成例5の(B-1)黒色顔料を含有する架橋ポリマー粒子に代えて、ポリメタクリル酸メチル系架橋ポリマー粒子(ガンツ化成株式会社製、商品名ガンツパールGM-0801S、平均粒子径8μm)を用い、黒色顔料としてカーボンブラック4重量部(三菱化学株式会社製 製品名#2600)を添加して実施例7と同様の方法で物性評価を行った。その結果を表4に記載する。
実施例7で用いた合成例5の(B-1)黒色顔料を含有する架橋ポリマー粒子に代えて、黒色顔料としてカーボンブラック4重量部(三菱化学株式会社製 製品名#2600)を添加して実施例7と同様の方法で物性評価を行った。その結果を表4に記載する。
<白色絶縁膜用樹脂組成物の調製>
合成例1~4で得られた(A)バインダーポリマー、(B)成分として、合成例6で得られた(B-2)白色顔料を含有する架橋ポリマー粒子、(C)熱硬化性樹脂、(F)リン系難燃剤、その他成分、及び有機溶媒を添加して白色絶縁膜用樹脂組成物を作製した。それぞれの構成原料の樹脂固形分での配合量及び原料の種類を表5に記載する。なお、表中の溶媒である1,2-ビス(2-メトキシエトキシ)エタンは上記合成した樹脂溶液に含まれる溶剤も含めた全溶剤量である。白色絶縁膜用樹脂組成物ははじめに一般的な攪拌翼のついた攪拌装置で混合し、その後3本ロールミルで2回パスし均一な溶液とした。グラインドメーターにて粒子径を測定したところ、いずれも10μm以下であった。混合溶液を脱泡装置で溶液中の泡を完全に脱泡して下記評価を実施した。
<2>日産化学株式会社製 多官能エポキシ樹脂(トリグリシジルイソシアヌレート)の製品名
<3>クラリアントジャパン株式会社製 ホスフィン酸塩の製品名
<4>日産化学株式会社製 メラミンの製品名
<5>共栄社化学株式会社製 ブタジエン系消泡剤の製品名。
上記白色絶縁膜用樹脂組成物を、ベーカー式アプリケーターを用いて、25μmのポリイミドフィルム(株式会社カネカ製:商品名25NPI)に最終乾燥厚みが20μmになるように100mm×100mmの面積に流延・塗布し、80℃で20分乾燥した後、150℃のオーブン中で30分加熱硬化させてポリイミドフィルム上に白色絶縁膜を作製した。
得られた白色絶縁膜について、以下の項目につき評価を行った。評価結果を表6に記載する。なお、タック性、耐折れ性、電気絶縁信頼性、半田耐熱性、反りについては、実施例1~6と同様の方法で評価した。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同じ方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製アピカル25NPI)表面に20μm厚みの白色絶縁膜積層フィルムを作製した。得られた白色絶縁膜積層フィルムを用いて、白色絶縁膜の反射率を下記方法で測定し、450nmにおける測定値を反射率とした。反射率は80%以上であることが好ましい。
使用装置:日本分光株式会社製 紫外可視分光光度計 V-650
測定波長領域:300~800nm
標準白板:ラブスフェア社製 スペクトラロンTM。
実施例14で用いた合成例6の(B-2)白色顔料を含有する架橋ポリマー粒子に代えて、ポリメタクリル酸メチル系架橋ポリマー粒子(ガンツ化成株式会社製、商品名ガンツパールGM-0801S、平均粒子径8μm)を用い、白色顔料としてルチル型酸化チタン12.50重量部(石原産業株式会社製 製品名タイペークCR-60)を添加して実施例14と同様の方法で物性評価を行った。その結果を表6に記載する。
合成例2で得られたバインダーポリマーである分子内にウレタン結合及びカルボキシル基を含有する樹脂60.0重量部、エポキシ樹脂22.5重量部(ジャパンエポキシレジン株式会社製の商品名jER828)、メラミン2.5重量部(日産化学株式会社製の商品名微粉メラミン)、コアシェル多層構造をもつ有機微粒子12.0重量部(ガンツ化成株式会社製、商品名スタフィロイドAC-3816、平均粒子径0.5μm)を用いて実施例14と同様の方法で物性評価を行った。その結果を表6に記載する。
実施例14で用いた合成例6の(B-2)白色顔料を含有する架橋ポリマー粒子に代えて、白色顔料としてルチル型酸化チタン12.50重量部(石原産業株式会社製 製品名タイペークCR-60)を添加して実施例14と同様の方法で物性評価を行った。その結果を表6に記載する。
<白色絶縁膜用樹脂組成物の調製>
合成例1~4で得られた(A)バインダーポリマー、(B)成分として、合成例6で得られ(B-2)白色顔料を含有する架橋ポリマー粒子、(C)熱硬化性樹脂、(D)分子内にラジカル重合性基を有する化合物、(E)光重合開始剤(F)リン系難燃剤、その他成分、及び有機溶媒を添加して白色絶縁膜用樹脂組成物を作製した。それぞれの構成原料の樹脂固形分での配合量及び原料の種類を表7に記載する。なお、表中の溶媒である1,2-ビス(2-メトキシエトキシ)エタンは上記合成した樹脂溶液に含まれる溶剤も含めた全溶剤量である。白色絶縁膜用樹脂組成物ははじめに一般的な攪拌翼のついた攪拌装置で混合し、その後3本ロールミルで2回パスし均一な溶液とした。グラインドメーターにて粒子径を測定したところ、いずれも10μm以下であった。混合溶液を脱泡装置で溶液中の泡を完全に脱泡して下記評価を実施した。
<2>日産化学株式会社製 多官能エポキシ樹脂(トリグリシジルイソシアヌレート)の製品名
<3>クラリアントジャパン株式会社製 ホスフィン酸塩の製品名
<4>日産化学株式会社製 メラミンの製品名
<5>共栄社化学株式会社製 ブタジエン系消泡剤の製品名
<6>日立化成工業株式会社製 分子内にラジカル重合性基を有する化合物(EO変性ビスフェノールAジメタクリレート)の製品名
<7>日本化薬株式会社製、分子内にラジカル重合性基を有する化合物(カルボキシル基及び感光性基含有樹脂の製品名 固形分濃度65%、固形分酸価98mgKOH/g)
<8>BASFジャパン株式会社製 光重合開始剤の製品名。
<ポリイミドフィルム上への塗膜の作製>
上記白色絶縁膜用樹脂組成物を、ベーカー式アプリケーターを用いて、25μmのポリイミドフィルム(株式会社カネカ製:商品名25NPI)に最終乾燥厚みが20μmになるように100mm×100mmの面積に流延・塗布し、80℃で20分乾燥した後、300mJ/cm2の積算露光量の紫外線を照射して露光した。次いで、1.0重量%の炭酸ナトリウム水溶液を30℃に加熱した溶液を用いて、1.0kgf/mm2の吐出圧で90秒スプレー現像を行った。現像後、純水で十分洗浄した後、150℃のオーブン中で30分加熱硬化させてポリイミドフィルム上に白色絶縁膜用樹脂組成物の硬化膜を作製した。
得られた硬化膜について、以下の項目につき評価を行った。評価結果を表8に記載する。なお、感光性、タック性、耐折れ性、電気絶縁信頼性、半田耐熱性、反り、難燃性については、実施例7~13と同様の方法で評価した。
上記<ポリイミドフィルム上への塗膜の作製>の項目と同様の方法で、25μm厚みのポリイミドフィルム(株式会社カネカ製アピカル25NPI)表面に20μm厚みの白色絶縁膜積層フィルムを作製した。得られた白色絶縁膜積層フィルムを用いて、白色絶縁膜の反射率を下記方法で測定し、450nmにおける測定値を反射率とした。反射率は80%以上であることが好ましい。
使用装置:日本分光株式会社製 紫外可視分光光度計 V-650
測定波長領域:300~800nm
標準白板:ラブスフェア社製 スペクトラロンTM。
実施例20で用いた合成例6の(B-2)白色顔料を含有する架橋ポリマー粒子に代えて、ポリメタクリル酸メチル系架橋ポリマー粒子(ガンツ化成株式会社製、商品名ガンツパールGM-0801S、平均粒子径8μm)を用い、白色顔料としてルチル型酸化チタン11.40重量部(石原産業株式会社製 製品名タイペークCR-60)を添加して実施例20と同様の方法で物性評価を行った。その結果を表8に記載する。
実施例20で用いた合成例6の(B-2)白色顔料を含有する架橋ポリマー粒子に代えて、白色顔料としてルチル型酸化チタン11.40重量部(石原産業株式会社製 製品名タイペークCR-60)を添加して実施例20と同様の方法で物性評価を行った。その結果を表8に記載する。
2 反り量
3 平滑な台
Claims (20)
- 少なくとも
(A)バインダーポリマー、及び
(B)顔料を含有する架橋ポリマー粒子
を含有することを特徴とする顔料含有絶縁膜用樹脂組成物。 - 前記(B)顔料を含有する架橋ポリマー粒子が、分子内にウレタン結合を有することを特徴とする請求項1に記載の顔料含有絶縁膜用樹脂組成物。
- 前記(B)顔料が、黒色顔料または白色顔料であることを特徴とする請求項1または2に記載の顔料含有絶縁膜用樹脂組成物。
- 前記黒色顔料がカーボンブラックであることを特徴とする請求項3に記載の顔料含有絶縁膜用樹脂組成物。
- 前記白色顔料が酸化チタンであることを特徴とする請求項3に記載の顔料含有絶縁膜用樹脂組成物。
- 更に(C)熱硬化性樹脂を含有することを特徴とする請求項1~5のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物。
- 更に(D)分子内にラジカル重合性基を有する化合物及び(E)光重合開始剤を含有することを特徴とする請求項1~6のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物。
- 前記(A)バインダーポリマーが、下記(a1)~(a3)からなる群から選ばれる少なくとも1種を有することを特徴とする請求項1~7のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物。
(a1)ウレタン結合
(a2)カルボキシル基
(a3)イミド基 - 前記(B)顔料を含有する架橋ポリマー粒子の平均粒子径が、1~20μmであることを特徴とする請求項1~8のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物。
- 前記(B)顔料を含有する架橋ポリマー粒子の吸油量が、50ml/100g以上であることを特徴とする請求項1~9のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物。
- 前記(B)顔料を含有する架橋ポリマー粒子の配合量が、(A)バインダーポリマー100重量部に対して30~100重量部であることを特徴とする請求項1~10のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物。
- 更に(F)リン系難燃剤を含有することを特徴とする請求項1~11のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物。
- 前記(F)リン系難燃剤が、ホスフィン酸塩であることを特徴とする請求項12に記載の顔料含有絶縁膜用樹脂組成物。
- 前記(F)リン系難燃剤の配合量が、(A)バインダーポリマー100重量部に対して5~100重量部であることを特徴とする請求項12または13に記載の顔料含有絶縁膜用樹脂組成物。
- 請求項1~14のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物を基材表面に塗布した後、乾燥して得られたことを特徴とする顔料含有絶縁膜用樹脂フィルム。
- 請求項15に記載の顔料含有絶縁膜用樹脂フィルムを硬化させて得られることを特徴とする顔料含有絶縁膜。
- 請求項16に記載の顔料含有絶縁膜がプリント配線板に被覆されたことを特徴とする顔料含有絶縁膜付きプリント配線板。
- 請求項1~14のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物から得られることを特徴とする顔料含有絶縁膜用樹脂フィルム。
- 請求項1~14のいずれか1項に記載の顔料含有絶縁膜用樹脂組成物から得られることを特徴とする顔料含有絶縁膜。
- 請求項19に記載の顔料含有絶縁膜がプリント配線板に被覆されたことを特徴とする顔料含有絶縁膜付きプリント配線板。
Priority Applications (4)
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US14/374,465 US9957390B2 (en) | 2012-01-25 | 2012-12-19 | Resin composition for pigment-containing insulating film, and use thereof |
KR1020147023176A KR101611318B1 (ko) | 2012-01-25 | 2012-12-19 | 신규한 안료 함유 절연막용 수지 조성물 및 그 이용 |
CN201280068045.1A CN104081884B (zh) | 2012-01-25 | 2012-12-19 | 新颖的含颜料绝缘膜用树脂组合物及其利用 |
JP2013555156A JP5797279B2 (ja) | 2012-01-25 | 2012-12-19 | 新規な顔料含有絶縁膜用樹脂組成物を用いた顔料含有絶縁膜付きプリント配線板 |
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JP2012-013341 | 2012-01-25 | ||
JP2012-089523 | 2012-04-10 | ||
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JP2012-089522 | 2012-04-10 |
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JP (1) | JP5797279B2 (ja) |
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CN (1) | CN104081884B (ja) |
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JP5797279B2 (ja) | 2015-10-21 |
US20140370301A1 (en) | 2014-12-18 |
JPWO2013111481A1 (ja) | 2015-05-11 |
TW201335290A (zh) | 2013-09-01 |
KR101611318B1 (ko) | 2016-04-11 |
TWI519610B (zh) | 2016-02-01 |
CN104081884B (zh) | 2017-12-19 |
KR20140116519A (ko) | 2014-10-02 |
US9957390B2 (en) | 2018-05-01 |
CN104081884A (zh) | 2014-10-01 |
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