WO2020080352A1 - 樹脂組成物、硬化膜、硬化膜付きプリント配線板およびその製造方法 - Google Patents
樹脂組成物、硬化膜、硬化膜付きプリント配線板およびその製造方法 Download PDFInfo
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- WO2020080352A1 WO2020080352A1 PCT/JP2019/040438 JP2019040438W WO2020080352A1 WO 2020080352 A1 WO2020080352 A1 WO 2020080352A1 JP 2019040438 W JP2019040438 W JP 2019040438W WO 2020080352 A1 WO2020080352 A1 WO 2020080352A1
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- wiring board
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/10—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers containing more than one epoxy radical per molecule
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/067—Polyurethanes; Polyureas
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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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
- C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
- C08K5/5333—Esters of phosphonic acids
- C08K5/5373—Esters of phosphonic acids containing heterocyclic rings not representing cyclic esters of phosphonic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/025—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing nitrogen atoms
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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
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/06—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
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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
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C08L101/06—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing oxygen atoms
- C08L101/08—Carboxyl groups
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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
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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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
- C08L75/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
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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
Definitions
- the present invention relates to a resin composition, a cured film obtained by curing the resin composition, and a printed wiring board provided with the cured film.
- An insulating cured film is formed on the circuit of the printed wiring board using an insulating thermosetting resin or an ultraviolet curable resin in order to maintain insulation reliability.
- the insulating cured film may be required to have flame retardancy, and a non-halogen flame retardant is used from the viewpoint of environmental load (Patent Document 1).
- An object of the present invention is to provide a cured film having excellent flame retardancy, less likely to cause defects such as bleed-out, and excellent in flexibility, and a resin composition used for forming the cured film.
- the resin composition of the present invention contains (a) a binder resin, (b) a thermosetting resin, and (c) a flame retardant.
- the binder resin (a) is a polymer having a urethane bond in the molecule, and may further have a carboxy group and / or a photopolymerizable functional group.
- the acid value of the binder resin may be 5 to 200 mgKOH / g.
- the (b) thermosetting resin is, for example, a polyfunctional epoxy resin.
- the flame retardant is an organic phosphorus compound (spiro ring diphosphonate compound) represented by the following general formula.
- R 2 and R 5 are each independently a phenyl group which may have a substituent, a naphthyl group which may have a substituent, or an anthryl group which may have a substituent.
- R 1 , R 3 , R 4 and R 6 are each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a phenyl group which may have a substituent or a naphthyl group which may have a substituent. , Or an anthryl group which may have a substituent.
- the resin composition comprises, in addition to the components (a), (b) and (c), (d) a compound having an ethylenically unsaturated group (photocurable compound), (e) a photopolymerization initiator, (F) A colorant or the like may be included.
- the content of the component (c) in the resin composition may be about 10 to 30 parts by weight based on 100 parts by weight of the total solid content.
- a coating film (insulating film) is formed by applying the above resin composition on a substrate and drying the solvent as necessary.
- a cured film is obtained by photo-curing and / or heat-curing this insulating film.
- the above resin composition is applied to the surface of a printed wiring board to form a coating film, and at least a part of the surface of the coating film is irradiated with an actinic ray to perform photo-curing, and if necessary, alkali After development by the like, the coating film after photo-curing is heated and thermally cured to form a printed wiring board with a cured film.
- the printed wiring board may be a flexible printed wiring board using a flexible film substrate such as a polyimide film.
- the cured film formed from the above resin composition has excellent flame retardancy, is less likely to cause defects such as bleed-out of the flame retardant, and is also excellent in flexibility.
- the resin composition of the present invention contains (a) a binder resin, (b) a thermosetting resin, and (c) an organophosphorus compound. Since it has a thermosetting resin, the resin composition has thermosetting properties.
- the binder resin (a) may be one having reactivity with the thermosetting resin.
- the binder resin may have a photocurable functional group such as an ethylenically unsaturated group. Since the resin composition contains the binder resin having photocurability, the resin composition has photocurability (photosensitivity) in addition to thermosetting.
- the resin composition may further contain (d) a compound having an ethylenically unsaturated group (photocurable compound).
- the resin composition may further contain (e) a photopolymerization initiator.
- the resin composition may further contain (f) a colorant.
- a colorant By containing the colorant, the insulating film obtained from the resin composition can be arbitrarily colored.
- the binder resin is a polymer that is soluble in an organic solvent and has a polyethylene glycol-equivalent weight average molecular weight of 1,000 or more and 1,000,000 or less.
- the weight average molecular weight of the binder resin is more preferably 2,000 to 200,000, further preferably 3,000 to 100,000, particularly preferably 4,000 to 50,000.
- the weight average molecular weight of the binder resin is within the above range, a cured film having excellent heat resistance and flexibility can be easily obtained.
- the binder resin is a urethane polymer having at least one urethane bond in the molecule.
- the urethane polymer is obtained, for example, by reacting a diol with a diisocyanate.
- the diisocyanate compound may be either an alicyclic diisocyanate compound or an aliphatic diisocyanate compound.
- the diisocyanate compound may be a reaction product of a compound having two or more functional groups capable of reacting with an isocyanate group, and may be, for example, a urethane compound having an isocyanate group at a terminal.
- the diisocyanate compound may be any of aromatic isocyanate, alicyclic isocyanate, aliphatic isocyanate and alicyclic diisocyanate.
- the diisocyanate compound may be a reaction product of a compound having two or more functional groups capable of reacting with the isocyanate group of the diisocyanate compound, and may be, for example, a urethane compound having an isocyanate group at the terminal.
- a urethane compound having an isocyanate group at the terminal.
- Examples of the alicyclic diisocyanate include hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene diisocyanate, isophorone diisocyanate and norbornene diisocyanate.
- Examples of the aliphatic diisocyanate include hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, lysine diisocyanate and the like.
- diol examples include ethylene glycol, diethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, 1, 6-hexanediol, 1,8-octanediol, 2-methyl 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol
- Polyoxyalkylene diols such as polyethylene glycol, polypropylene glycol, polytetramethylene glycol, random copolymers of tetramethylene glycol and neopentyl glycol; polyhydric alcohols and polybasic acids Polyester diol obtained: Polycarbonate diol having a carbonate
- Two or more diols may be used in combination.
- a long-chain diol such as polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polyoxyalkylene diol, polyester diol, polycarbonate diol, or polycaprolactone diol
- the elastic modulus of the cured film decreases and flexibility Tends to improve.
- the binder resin may have a carboxy group in the molecule. By having a carboxy group, the binder resin reacts with the component (b) described below, so that the heat resistance and chemical resistance of the cured film tend to be improved.
- the solubility in an alkali developing solution is improved, so that it is possible to form a fine pattern in a short development time.
- the acid value of the binder resin is preferably 5 to 200 mgKOH / g, more preferably 15 to 100 mgKOH / g. Since the crosslinked structure with the component (b) is densely formed by the binder resin having an appropriate acid value, the heat resistance, insulation reliability and chemical resistance of the cured film can be improved.
- a polymer having a carboxy group in the molecule can be obtained, for example, by using a compound having two hydroxyl groups and one carboxy group in the molecule as a diol component for forming a urethane polymer.
- the diol compound having two hydroxyl groups and one carboxy group include 2,2-bis (hydroxymethyl) propionic acid, 2,2-bis (2-hydroxyethyl) propionic acid and 2,2-bis (3- Hydroxypropyl) propionic acid, 2,3-dihydroxy-2-methylpropionic acid, 2,2-bis (hydroxymethyl) butanoic acid, 2,2-bis (2-hydroxyethyl) butanoic acid, 2,2-bis Aliphatic diols such as (3-hydroxypropyl) butanoic acid, 2,3-dihydroxybutanoic acid, 2,4-dihydroxy-3,3-dimethylbutanoic acid, and 2,3-dihydroxyhexadecanoic acid; 2,3- Dihydroxybenzoic acid, 2,4-dihydroxy
- the binder resin may have an ethylenically unsaturated group in the molecule.
- the ethylenically unsaturated group include a vinyl group and a (meth) acryloyl group.
- (meth) acryl means acryl or methacryl
- (meth) acryloyl means acryloyl or methacryloyl.
- the binder resin has a photocurable functional group such as a (meth) acryloyl group
- a photocurable film can be formed from the resin composition.
- the resin composition contains the component (d) described below
- the binder resin having a photocurable functional group also reacts with the component (d), so that the crosslink density of the photocured film is increased and the heat resistance and Chemical resistance tends to improve.
- the photocrosslinking density By increasing the photocrosslinking density, the elution of the flame retardant into the developer or the like tends to be suppressed.
- the polymer having a (meth) acryloyl group in the molecule is, for example, a compound containing a hydroxyl group and at least one (meth) acryloyl group in the molecule in addition to a diol component and a diisocyanate component for forming a urethane polymer, And / or is obtained by using a compound containing an isocyanate group and at least one (meth) acryloyl group in the molecule.
- Examples of the compound having a hydroxyl group and a (meth) acryloyl group in the molecule include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate and 2-hydroxy-3-phenoxy.
- Examples of the compound having an isocyanate group and a (meth) acryloyl group in the molecule include 2- (meth) acryloyloxyethyl isocyanate, 1,1- (bisacryloyloxymethyl) ethyl isocyanate and 2- (2-methacryloyloxyethyloxy). Examples thereof include ethyl isocyanate.
- the binder resin may have two or more photocurable functional groups in one molecule.
- a compound having one hydroxyl group and one (meth) acryloyl group in one molecule is used, and if the ratio is increased, both ends of the polymer chain ( A urethane di (meth) acrylate having a (meth) acryloyl group is obtained.
- the content of the component (a) in the resin composition is 10 parts by weight based on 100 parts by weight of the total solid content.
- the amount is preferably -80 parts by weight, more preferably 20-70 parts by weight, still more preferably 30-60 parts by weight.
- thermosetting resin is a compound having at least one thermosetting functional group in the molecule.
- thermosetting resin include epoxy resin, oxetane resin, isocyanate resin, blocked isocyanate resin, bismaleimide resin, bisallylnadiimide resin, polyester resin (for example, unsaturated polyester resin), diallyl phthalate resin, silicon resin, vinyl ester.
- Resin melamine resin, polybismaleimide triazine resin (BT resin), cyanate resin (for example, cyanate ester resin), urea resin, guanamine resin, sulfamide resin, aniline resin, polyurea resin, thiourethane resin, polyazomethine resin, episulfide resin , Ene-thiol resin, benzoxazine resin and the like.
- a polyfunctional epoxy resin having two or more epoxy groups in one molecule is preferable because it can impart heat resistance to the cured film and can impart adhesiveness to a conductor such as a metal foil or a circuit board.
- the epoxy resin may be a modified epoxy resin with urethane, rubber, chelate, dimer acid or the like.
- a commercially available epoxy resin may be used as it is as the component (b).
- the epoxy equivalent of the epoxy resin (mass (g) of the compound containing 1 equivalent of epoxy group) is preferably 2000 or less, and more preferably 1500 or less.
- the weight average molecular weight of the epoxy resin is preferably about 150 to 2000, more preferably about 200 to 1500.
- the content of the component (b) in the resin composition is 1 to 70 parts by weight based on 100 parts by weight of the total solid content. Is preferred, 5 to 50 parts by weight is more preferred, and 10 to 20 parts by weight is even more preferred.
- the resin composition may contain a thermosetting resin curing agent and / or a curing accelerator.
- the curing agent include phenol novolac resin, cresol novolac resin, phenol resin such as naphthalene type phenol resin, amino resin, urea resin, melamine, and dicyandiamide.
- curing accelerator examples include phosphine compounds such as triphenylphosphine; amine compounds such as tertiary amine compounds, trimethanolamine, triethanolamine, and tetraethanolamine; 1,8-diaza-bicyclo [5,4,0] ] -7-Undecenium tetraphenylborate and other borate compounds; imidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 1-benzyl-2-methyl Imidazoles such as imidazole, 2-heptadecyl imidazole, 2-isopropyl imidazole, 2,4-dimethyl imidazole, 2-phenyl-4-methyl imidazole; 2-methyl imidazoline, 2-ethyl imidazoline, 2-isopropyl imidazoline, 2- Fe Imidazolines such as loumidazoline, 2-undecylimid
- the resin composition contains an organic phosphorus compound (spiro ring diphosphonate compound) represented by the following general formula as a flame retardant.
- R 2 and R 5 are each independently a phenyl group which may have a substituent, a naphthyl group which may have a substituent, or an anthryl group which may have a substituent.
- R 1 , R 3 , R 4 and R 6 are each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a phenyl group which may have a substituent or a naphthyl group which may have a substituent. , Or an anthryl group which may have a substituent.
- the above organophosphorus compound can be produced, for example, by the method described in JP-A-2004-35480.
- an insulating film exhibiting excellent flame retardancy can be obtained by adding a small amount of the flame retardant. Since the amount of the flame retardant added is small, it is possible to suppress a decrease in heat resistance and film strength due to the addition of the flame retardant.
- the thermal decomposition behavior of the polymer and the flame retardant are matched. For example, since free radicals generated by thermal decomposition of the polymer are trapped by the flame retardant, it is considered that one of the factors contributing to the improvement of flame retardancy is that the chain reaction can be stopped in the initial stage of combustion.
- the flame retardance and the adhesiveness of the photocured film are less likely to change before and after alkali development, and the flame retardant is used. Bleed out is also unlikely to occur.
- the flame retardant is an organic phosphorus compound, so it has high compatibility with the binder resin, and the flame retardant is a solid at room temperature and is eluted into the alkali developer. There are some difficult things.
- a cured film containing a flame retardant tends to have lower flexibility and inferior flex resistance as the content of the flame retardant increases.
- the urethane polymer as the component (a) and the component (c)
- the resin composition of the present invention can be suitably used for forming an insulating protective film of a flexible printed wiring board for a foldable device.
- the content of the component (c) in the resin composition is preferably 1 to 50 parts by weight, more preferably 5 to 40 parts by weight, still more preferably 10 to 30 parts by weight, based on 100 parts by weight of the total solid content.
- the above-mentioned spiro-ring diphosphonate-based compound is more likely to exhibit a flame retardant effect than the inorganic phosphorus-based compound even in a small amount. Therefore, the content of the component (c) in the resin composition may be 20 parts by weight or less or 15 parts by weight or less.
- the amount of phosphorus atoms contained in the total solid content of the resin composition is preferably 0.5 to 10% by weight, more preferably 1 to 7% by weight, and even more preferably 1.5 to 5% by weight.
- the content of phosphorus atoms may be 4% by weight or less or 3% by weight or less.
- the resin composition may contain a photocurable compound.
- the resin composition has photosensitivity.
- the photocurable compound also reacts with the component (a), so that the crosslink density of the photocured film is increased, and heat resistance and chemical resistance tend to be improved. is there.
- the photocurable compound has at least one photocurable functional group.
- the photocurable functional group is preferably an ethylenically unsaturated group. Examples of the ethylenically unsaturated group include (meth) acryloyl group and vinyl group.
- the component (d) preferably has two or more photocurable functional groups in one molecule.
- a component having a lower molecular weight than the component (a) is used as the component (d).
- the weight average molecular weight of the component (d) is preferably 2000 or less, more preferably 1500 or less, and further preferably less than 1000.
- the functional group equivalent (mass (g) of the compound containing 1 equivalent of an ethylenically unsaturated group) of the component (d) is preferably 1000 or less, more preferably 750 or less, and further preferably 500 or less.
- polyfunctional (meth) acrylate having two or more (meth) acryloyl groups in one molecule ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene Glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, 2-hydroxy-1- (meth) Acryloxy-3- (meth) acryloxypropane, 1,4-butanediol di (meth) acrylate, 1,3-butylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acr Rate, neopentyl glycol di (meth) acrylate, pentaerythritol di (meth
- the resin composition contains the component (d)
- its content is preferably 1 to 50 parts by weight, more preferably 5 to 40 parts by weight, and more preferably 10 to 10 parts by weight based on 100 parts by weight of the total solid content of the resin composition. 30 parts by weight is more preferable.
- the resin composition preferably contains (e) a photopolymerization initiator.
- the photopolymerization initiator is a compound that absorbs and activates light energy such as UV (ultraviolet light) to start and accelerate the reaction of the radically polymerizable group.
- the resin composition contains a photopolymerization initiator, the resin composition can be used as a photosensitive resin composition.
- photoradical polymerization initiator examples include self-cleaving photoradical polymerization initiators such as benzoin compounds, acetophenones, aminoketones, oxime esters, acylphosphine oxide compounds, and azo compounds; and benzophenones and benzoins. Hydrogen abstraction type photoradicals of ethers, benzyl ketals, dibenzosuberones, anthraquinones, xanthones, thioxanthones, halogenoacetophenones, dialkoxyacetophenones, hydroxyacetophenones, halogenobisimidazoles, halogenotriazines, etc.
- a polymerization initiator may be used.
- the content of the component (e) in the resin composition may be set appropriately. From the viewpoint of enhancing the photosensitivity and preventing overexposure, the content of the component (e) is preferably 0.1 to 10 parts by weight, based on 100 parts by weight of the total of the components (a) and (d), 0.3 to 5 parts by weight is more preferable, and 0.5 to 3 parts by weight is still more preferable.
- the insulating film formed of the resin composition can be colored arbitrarily.
- the colorant is either a dye or a pigment.
- colorants include blue colorants, red colorants, yellow colorants, orange colorants, and purple colorants.
- Insulating films of various colors can be formed by combining a plurality of colorants. For example, a black colorant and a black colorant can be obtained by combining a blue pigment, an orange pigment, and a purple pigment.
- the blue colorant for example, C.I. which is a phthalocyanine-based, anthraquinone-based, or dioxazine-based pigment.
- C.I. which is a phthalocyanine-based, anthraquinone-based, or dioxazine-based pigment.
- Solvent Blue 35, 63, 68, 70, 83, 87, 94, 97 which is a dye system.
- metal-substituted or unsubstituted phthalocyanine compounds can also be used as the blue colorant.
- orange colorants examples include C.I. I. Pigment Orange 5, 13, 14, 16, 17, 24, 34, 36, 38, 40, 43, 46, 49, 51, 55, 59, 61, 63, 64, 71, 73.
- purple colorants examples include C.I. I. Pigment Violet 19, 23, 29, 30, 32, 36, 37, 38, 39, 40, 50; Solvent Violet 13, 36.
- the content of the component (f) may be appropriately set according to the type of colorant and the color of the insulating film. For example, about 1 to 10 parts by weight with respect to 100 parts by weight of the total solid content of the resin composition. And may be about 2 to 7 parts by weight, or about 3 to 5 parts by weight.
- the resin composition may contain a solvent in addition to the components (a) to (f).
- the solvent is not particularly limited as long as it can dissolve a resin component such as a binder polymer, and sulfoxides, formamides, acetamides, pyrrolidones, acetates, ethers, hexamethylphosphoramide, ⁇ -butyrolactone, etc.
- the polar organic solvent of is preferably used. These polar organic solvents may be used in combination with aromatic hydrocarbons such as xylene and toluene.
- the resin composition may contain various additives such as a defoaming agent, a leveling agent, an adhesion imparting agent, a stabilizer, and a filler, if necessary.
- a defoaming agent such as acrylic compounds, vinyl compounds, silicone compounds and the like.
- a resin composition is prepared by mixing the above components.
- Each of the above components may be subjected to operations such as pulverization / dispersion and defoaming before and / or after mixing, if necessary.
- the pulverization / dispersion may be carried out, for example, by using a kneading device such as a bead mill, a ball mill, or a triple roll.
- An insulating film can be formed by applying a resin composition (solution) on a substrate and drying a solvent as needed.
- a printed wiring board is used as the substrate.
- the printed wiring board may be a flexible printed wiring board using a flexible substrate such as a polyimide film.
- the resin composition may be applied onto the substrate by screen printing, curtain roll, reverse roll, spray coating, spin coating using a spinner, or the like.
- the thickness of the coating film may be adjusted so that the thickness after drying is about 5 to 100 ⁇ m, preferably 10 to 100 ⁇ m.
- the drying temperature is preferably 120 ° C. or lower, more preferably 40 to 100 ° C., from the viewpoint of suppressing the thermosetting reaction.
- the dried coating film may be used as it is as an insulating film. From the viewpoint of improving the heat resistance and chemical resistance of the insulating film, it is preferable to cure by heat curing and / or light curing.
- the component (b) When forming a thermosetting film, the component (b) may be cured by heat treatment of the coating film.
- the component (a) has a carboxy group
- the crosslinking density is increased by reacting the component (a) with the component (b).
- the curing temperature (maximum temperature at the time of thermal curing) is preferably 100 to 250 ° C. or less, more preferably 120 to 200 ° C., and 130 from the viewpoint of sufficiently promoting thermal curing and suppressing oxidation of metal wiring due to heat. It is more preferably up to 180 ° C.
- the coating film When forming a photo-cured film, the coating film may be exposed. At the time of exposure, a negative-type photomask is arranged on the coating film, and active rays such as ultraviolet rays, visible rays, and electron rays are irradiated to selectively cure the exposed portions. Next, by developing with a shower, paddle, dipping or the like, the non-exposed portion is dissolved, so that a pattern cured film is formed.
- active rays such as ultraviolet rays, visible rays, and electron rays
- an alkaline aqueous solution is used as the developing solution.
- the component (a) has a carboxy group and a photocurable functional group
- the component (a) has alkali solubility in the unexposed coating film and the component (a) is photocured in the coating film after exposure. Therefore, it has no alkali solubility. Therefore, when a photomask is arranged to perform exposure and development is performed using an alkali developing solution, the unexposed portion is dissolved in the developing solution, so that a patterned cured film is formed.
- the spiro-ring diphosphonate-based flame retardant as the component (c) is difficult to elute in an alkaline developer, the characteristics such as flame retardancy and adhesion of the cured film can be maintained even after alkaline development. .
- alkaline compound of the developer examples include alkali metals, alkaline earth metals, ammonium ions, hydroxides, carbonates, hydrogen carbonates, amine compounds and the like.
- alkali compound examples include sodium hydroxide, potassium hydroxide, ammonium hydroxide, sodium carbonate, potassium carbonate, ammonium carbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, ammonium hydrogencarbonate, tetramethylammonium hydroxide, tetraethylammonium hydroxy.
- the developing solution may contain an organic solvent miscible with water, such as methanol, ethanol, n-propanol, isopropanol, N-methyl-2-pyrrolidone.
- the alkali concentration of the developer is generally 0.01 to 20% by weight, preferably 0.02 to 10% by weight, and the temperature of the developer is generally 0 to 80 ° C, preferably 10 to 60 ° C.
- the patterned cured film (relief pattern) after development is preferably rinsed with a rinse liquid such as water or an acidic aqueous solution.
- the insulating film may be heat-cured by heating after photo-curing.
- the coating film after photocuring has thermosetting property because the thermosetting functional group such as the epoxy group of the component (b) remains unreacted.
- the carboxy group of the component (a) reacts with the epoxy group of the component (b) and the like, so that a crosslinked network of the binder resin and the thermosetting resin is formed, and the heat resistance of the cured film is improved.
- the curing temperature is preferably 100 to 250 ° C., more preferably 120 to 200 ° C., and 130 to 180 ° C. from the viewpoint of sufficiently promoting the thermal curing and suppressing the oxidation of the metal wiring due to heat. More preferable.
- the cured film obtained from the resin composition has excellent heat resistance and flame retardancy, and is therefore suitably used as a surface protective material for printed circuit boards. Further, since the cured film is excellent in flexibility, it is also suitably used as a cured film of a flexible printed board having metal wiring on a flexible film such as a polyimide film.
- Synthesis example In the following synthesis examples, a polymer having a carboxy group in the molecule was polymerized. The properties of the polymers obtained in Synthesis Examples 1 and 2 were evaluated by the following methods.
- polycarbonate diol manufactured by Asahi Kasei Corporation, trade name: PCDL T5652, weight average molecular weight 2000
- PCDL T5652 weight average molecular weight 2000
- 2,2-bis (hydroxymethyl) butanoic acid 3.70 g ( 0.025 mol)
- a solution of 13.02 g (0.100 mol) of 2-hydroxyethyl methacrylate in 40.00 g of methyl triglyme were added over 1 hour.
- This solution was heated and stirred at 80 ° C. for 5 hours to obtain a solution of a urethane polymer (a1) containing a carboxy group in the molecule and having a methacryloyl group at the terminal.
- the solid content concentration of the solution was 52%
- the weight average molecular weight of the polymer was 8,600
- the acid value was 18 mgKOH / g.
- Parts of a photopolymerization initiator (ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazole-3) was added to each resin composition.
- a flame retardancy test was conducted as follows in accordance with the flame retardancy UL94 standard. Cut a polyimide film with a cured film into a width of 50 mm and a length of 200 mm, put a marked line in the center part of the length direction (at a position of 125 mm), and round it into a cylinder so that the cured film side is on the outside, rather than the marked line. A tape was adhered to the upper overlapping portion (a portion of 75 mm in the length direction) and the upper portion so that there was no gap, to prepare a cylinder for flame retardancy test.
- Adhesion of the cured film was evaluated according to the cross-cut tape method of JIS K5400 using a polyimide film having a cured film (before and after development) as a sample.
- the tape peeling test was repeated 5 times for one sample, and the following area was evaluated based on the remaining area ratio (residual film ratio) of the cured film in the sample after the test.
- C The residual area ratio was 80% or more and less than 95
- the residual area ratio was less than 80%
- the polyimide film on which a cured film (after development) was formed was cut into a size of 5 mm ⁇ 100 mm, bent 180 ° so that the cured film was on the outside, and a load of 100 g was placed on the bent portion for 3 seconds. After removing the load, the bent portions were observed with an optical microscope to evaluate the presence or absence of cracks. This work was carried out until cracks were formed in the cured film, and the evaluation was made according to the following criteria. A: No cracks were generated even after 10 bendings B: Cracks were generated at 2 to 9 bendings C: Cracks were generated at 1 bending
- the resin composition was applied onto a polyimide film and dried at 80 ° C. for 20 minutes to prepare a polyimide film having a coating film (B stage film) formed thereon.
- the two films were superposed so that the coating films were in contact with each other, and the state when peeled off was observed and evaluated according to the following criteria.
- the pattern was etched, immersed in a 10% by volume sulfuric acid aqueous solution for 1 minute to surface-treat the copper foil, and then washed with pure water to prepare a flexible printed wiring board.
- a resin composition is applied to the wiring formation surface of this flexible printed wiring board by screen printing so that the final dry thickness is 20 ⁇ m, and dried, exposed, developed, washed, and heated in the same manner as above to form a cured film.
- the terminal of the wiring of this sample was connected to a power source, a direct current of 100 V was applied for 1000 hours in an environmental tester at 85 ° C. and 85% RH, and then the sample was visually observed and evaluated according to the following criteria.
- A No abnormalities such as swelling or bleeding were observed on the surface of the test piece and copper wiring.
- B Abnormalities such as swelling or oozing were observed on the surface of the test piece and / or copper wiring.
- Table 1 shows the compositions of the resin compositions of Examples and Comparative Examples (formulation and P atom content relative to the total solid content) and the evaluation results in a list. The shaded items in Table 1 have not been evaluated. Details of each component are as shown below.
- Example 1 and Example 2 using the spiro-ring diphosphonate flame retardant were excellent in flame retardancy. Further, from the comparison between Example 1 and Comparative Examples 1 to 6, it can be seen that the flame retardancy is improved by adding a small amount of the spiro ring diphosphonate flame retardant. It is considered that this is because the radical trap mechanism of the flame retardant effectively acted on the free radicals generated at the start of combustion.
- Example 1 the cured film exhibited high adhesiveness, and the adhesiveness and heat resistance did not decrease even after alkali development. Moreover, in Examples 1 and 2, the same good bending resistance as that of Reference Example 1 containing no flame retardant was exhibited, and the decrease of the bending resistance due to the addition of the flame retardant did not occur.
- Comparative Examples 7 and 8 in which the acrylic polymer was used as the binder resin and the spiro-ring diphosphonate flame retardant was added, the flame retardancy, adhesiveness, and tackiness were good as in Examples 1 and 2. However, in Comparative Examples 7 and 8, the crease resistance decreased as the amount of the flame retardant added increased.
- the spiro-ring diphosphonate flame retardant was added to the resin composition containing the urethane binder, specifically, it has excellent flame retardancy and adhesion, and also has excellent flexibility. It can be seen that a film can be formed.
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Abstract
Description
バインダー樹脂は、有機溶媒に対して可溶性であり、ポリエチレングリコール換算の重量平均分子量が1,000以上、1,000,000以下のポリマーである。バインダー樹脂の重量平均分子量は、2,000~200,000がより好ましく、3,000~100,000がさらに好ましく、4,000~50,000が特に好ましい。バインダー樹脂の重量平均分子量が上記範囲内であれば、耐熱性と柔軟性に優れる硬化膜が得られやすい。
熱硬化性樹脂は、分子内に少なくとも1つの熱硬化性官能基を有する化合物である。熱硬化性樹脂としては、エポキシ樹脂、オキセタン樹脂、イソシアネート樹脂、ブロックイソシアネート樹脂、ビスマレイミド樹脂、ビスアリルナジイミド樹脂、ポリエステル樹脂(例えば不飽和ポリエステル樹脂等)、ジアリルフタレート樹脂、珪素樹脂、ビニルエステル樹脂、メラミン樹脂、ポリビスマレイミドトリアジン樹脂(BT樹脂)、シアネート樹脂(例えばシアネートエステル樹脂等)、ユリア樹脂、グアナミン樹脂、スルホアミド樹脂、アニリン樹脂、ポリウレア樹脂、チオウレタン樹脂、ポリアゾメチン樹脂、エピスルフィド樹脂、エン-チオール樹脂、ベンゾオキサジン樹脂等が挙げられる。硬化膜に耐熱性を付与できると共に、金属箔等の導体や回路基板に対する接着性を付与できることから、1分子中に2以上のエポキシ基を有する多官能エポキシ樹脂が好ましい。
樹脂組成物は、難燃剤として下記の一般式で表される有機リン系化合物(スピロ環ジホスホネート化合物)を含む。
樹脂組成物は、光硬化性化合物を含んでいてもよい。光硬化性化合物を含むことにより、樹脂組成物は感光性を有する。(a)バインダー樹脂が光硬化性官能基を有する場合、光硬化性化合物は(a)成分とも反応するため、光硬化膜の架橋密度が高められ、耐熱性や耐薬品性が向上する傾向がある。
(a)成分が光重合性官能基を有する場合、および/または樹脂組成物が(d)成分を含む場合、樹脂組成物は、(e)光重合開始剤を含有することが好ましい。光重合開始剤は、UV(紫外光)等の光エネルギーを吸収して活性化し、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。樹脂組成物が光重合開始剤を含有することにより、樹脂組成物を感光性樹脂組成物として利用することができる。
樹脂組成物が(f)着色剤を含有することにより、樹脂組成物により形成される絶縁膜を任意に着色することができる。着色剤は、染料または顔料のいずれかである。着色剤としては、青色着色剤、赤色着色剤、黄色着色剤、橙色着色剤、紫色着色剤等が挙げられる。複数の着色剤を組み合わせることにより様々な色の絶縁膜を形成できる。例えば、青色顔料と橙色顔料と紫色顔料とを組み合わせることにより、黒色着色剤黒色着色剤とすることもできる。
樹脂組成物は、上記(a)~(f)成分の他に溶媒を含んでいてもよい。溶媒としては、バインダーポリマー等の樹脂成分を溶解できるものであれば特に限定されず、スルホキシド類、ホルムアミド類、アセトアミド類、ピロリドン類、アセテート類、エーテル類、ヘキサメチルホスホルアミド、γ-ブチロラクトン等の極性有機溶媒が好適に用いられる。これらの極性有機溶媒と、キシレン、トルエン等の芳香族炭化水素とを組み合わせて用いることもできる。
上記の各成分を混合することにより、樹脂組成物を調製する。上記の各成分は、混合前および/または混合後に、必要に応じて、粉砕・分散や、脱泡等の操作を行ってもよい。粉砕・分散は、例えば、ビーズミル、ボールミル、3本ロール等の混練装置を用いて実施すればよい。
樹脂組成物(溶液)を基板上に塗布し、必要に応じて溶媒を乾燥することにより絶縁膜を形成できる。基板としては、例えばプリント配線板が用いられる。プリント配線板の金属配線上に絶縁膜を形成することにより、絶縁信頼性が高められる。プリント配線板は、ポリイミドフィルム等の可撓性基板を用いたフレキシブルプリント配線板であってもよい。
以下の合成例では、分子内にカルボキシ基を有するポリマーを重合した。合成例1,2で得られたポリマーの特性は、以下の方法により評価した。
JIS K 5601-1-2に従って測定を行った。乾燥条件は170℃×1時間とした。
ゲルパーミエーションクロマトグラフィー(GPC)により、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(6.0mm I.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
分子量標準品:PEG(ポリエチレングリコール)
JIS K 5601-2-1に従って測定を行った。
攪拌機、温度計、滴下漏斗、および窒素導入管を備えた反応容器に、重合用溶媒として1,2-ビス(2-メトキシエトキシ)エタン(メチルトリグライム)40.00gおよびノルボルネンジイソシアネート20.62g(0.100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(旭化成株式会社製、商品名:PCDL T5652、重量平均分子量2000):50.00g(0.025モル)、2,2-ビス(ヒドロキシメチル)ブタン酸:3.70g(0.025モル)、および2-ヒドロキシエチルメタクリレート:13.02g(0.100モル)をメチルトリグライム:40.00gに溶解した溶液を1時間かけて添加した。この溶液を80℃で5時間加熱攪拌して、分子内にカルボキシ基を含有し、末端にメタクリロイル基を有するウレタンポリマー(a1)の溶液を得た。溶液の固形分濃度は52%、ポリマーの重量平均分子量は8,600、酸価は18mgKOH/gであった。
攪拌機、温度計、滴下漏斗、およ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100.0gを仕込み、窒素気流下で攪拌しながら80℃に昇温した。これに、室温で予め混合しておいた、メタクリル酸12.0g(0.14モル)、メタクリル酸ベンジル28.0g(0.16モル)、メタクリル酸ブチル60.0g(0.42モル)、およびラジカル重合開始剤としてアゾビスイソブチロニトリル0.5g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℃に昇温し、反応溶液の温度を90℃に保ちながらさらに2時間攪拌を行い、分子内にカルボキシ基を含有するアクリル系ポリマー(a2)の溶液を得た。溶液の固形分濃度は50%、ポリマーの重量平均分子量は48,000、酸価は78mgKOH/gであった。
表1に示す配合の組成物(単位は重量部)をメチルトリグライムに溶解させ、攪拌装置により撹拌した後、3本ロールミルで分散した。その後、脱泡装置で脱泡を行い、均一な溶液を調製した。溶媒としてのメチルトリグライムの量(上記合成例のポリマー溶液に含まれる溶媒も含めた全溶媒量)は、30重量部とした。各樹脂組成物には、表1に示す成分の他に、1.0重量部の光重合開始剤(エタノン,1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル]-,1-(o-アセチルオキシム;BASF製「イルガキュア OXE02」)および0.1重量部のブタジエン系消泡剤(共栄社化学製「フローレン AC-2000」)を添加した。
<ポリイミドフィルム上への硬化膜の形成>
厚み25μmのポリイミドフィルム(カネカ製「アピカル25NPI」)上に、樹脂組成物を、スクリーン印刷により最終乾燥厚みが20μmになるように塗布し、80℃で20分乾燥した後、100mJ/cm2の積算露光量の紫外線を照射して露光した。次いで、30℃の1.0重量%炭酸ナトリウム水溶液を、1.0kgf/mm2の吐出圧で60秒スプレーして現像を行った。現像後、純水で十分洗浄した後、140℃のオーブン中で60分加熱して、ポリイミドフィルム上に硬化膜(現像後)を形成した。
硬化膜(現像前および現像後)を形成したポリイミドフィルムを試料として、難燃性UL94規格に従い、以下のように難燃性試験を行った。
硬化膜付きポリイミドフィルムを、幅50mm×長さ200mmに切り出し、長さ方向の中央部分(125mmの箇所)に標線を入れ、硬化膜側が外側となるように筒状に丸め、標線よりも上の重ね合わせ部分(長さ方向75mmの箇所)および上部に、隙間がないようにテープを貼り、難燃性試験用の筒を作製した。
A:5本全てがOKであったもの
B:5本中1~4本がOKであったもの
C:5本全てがNGであったもの
硬化膜(現像前および現像後)を形成したポリイミドフィルムを試料として、JIS K5400の碁盤目テープ法に準じて、硬化膜の密着性を評価した。1つの試料に対してテープ剥離試験を5回繰り返して行い、試験後の試料における硬化膜の残存面積率(残膜率)から、下記の基準で評価を行った。
A:剥がれがみられなかったもの(残存面積率100%)
B:剥離がみられたが、残存面積率が95%以上であったもの
C:残存面積率が80%以上95未満であったもの
D:残存面積率が80%未満であったもの
A:折り曲げ10回でもクラックが発生しなかったもの
B:折り曲げ2回以上9回以下でクラックが発生したもの
C:折り曲げ1回でクラックが発生したもの
上記と同様にして、ポリイミドフィルム上に樹脂組成物を塗布し、80℃で20分乾燥し、塗膜(Bステージ膜)が形成されたポリイミドフィルムを作製した。塗膜同士が接するように2枚のフィルムを重ね合わせ、引き剥がしたときの状態を観察し、下記の基準により評価した。
A: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かったもの
B:塗膜同士が貼り付き剥がした後に跡が残っていたもの、または塗膜同士が完全に貼り付いて引き剥がせなかったもの
厚み25μmのポリイミドフィルム(カネカ製「アピカル25NPI」)と厚み12μmの電解銅箔とをポリイミド系接着剤により張り合わせたフレキシブル銅張積層板の銅箔を、ライン幅/スペース幅=100μm/100μmの櫛形パターンにエッチングし、10容量%の硫酸水溶液中に1分間浸漬して銅箔の表面処理を行った後、純水で洗浄してフレキシブルプリント配線板を作製した。このフレキシブルプリント配線板の配線形成面に、脂組成物を、スクリーン印刷により最終乾燥厚みが20μmになるように塗布し、上記と同様に、乾燥、露光、現像、洗浄および加熱を行い、硬化膜付きフレキシブルプリント配線板を得た。この試料の配線の端子を電源に接続し、85℃、85%RHの環境試験機中で100Vの直流電流を1000時間印加した後、試料を目視にて観察し、下記の基準により評価した。
A:試験片表面および銅配線上に、膨れ、染み出し等の異常がみられなかったもの
B:試験片表面および/または銅配線上に、膨れ、染み出し等の異常が見られたもの
実施例および比較例の樹脂組成物の組成(配合、および固形分全量に対するP原子含有量)、ならびに評価結果を、表1に一覧で示す。なお、表1の斜線の項目は未評価である。各成分の詳細は以下に示す通りである。
<2>日立化成製「ファンクリル FA-321M」;EO変性ビスフェノールAジメタクリレート(平均分子量804)
<3>帝人製「ファイヤガード FCX-210」;スピロ環ジホスホネート系難燃剤
<4>クラリアント製「Exolit OP-935」;ホスフィン酸金属塩系難燃剤
<5>大塚化学製「SPB-100L」;ホスファゼン系難燃剤
<6>ナバルテック製「APYRAL AOH60」;水酸化アルミニウム系難燃剤
<7>大八木化学工業製「CR-733S」;リン酸エステル系難燃剤
<8>下記の青色顔料、橙色顔料および紫色顔料を、重量比1:1:1で混合した黒色顔料
青色顔料:BASF製 Pigment Blue 15:4
橙色顔料:クラリアント製 Pigment Orange 43
紫色顔料:クラリアント製 Pigment Violet 19
Claims (14)
- 前記(a)バインダー樹脂が、分子内にカルボキシ基を有する、請求項1に記載の樹脂組成物。
- 前記(a)バインダー樹脂の酸価が5~200mgKOH/gである、請求項2に記載の樹脂組成物。
- 前記(a)バインダー樹脂が、分子内にエチレン性不飽和基を有する、請求項1~3のいずれか1項に記載の樹脂組成物。
- さらに、(d)エチレン性不飽和基を有する化合物を含む、請求項1~4のいずれか1項に記載の樹脂組成物。
- さらに(e)光重合開始剤を含有する、請求項4または5に記載の樹脂組成物。
- さらに、(f)着色剤を含有する、請求項1~6のいずれか1項に記載の樹脂組成物。
- 前記(b)熱硬化性樹脂が多官能エポキシ樹脂である、請求項1~7のいずれか1項に記載の樹脂組成物。
- 全固形分100重量部に対する前記(c)難燃剤の含有量が、10~30重量部である、請求項1~8のいずれか1項に記載の樹脂組成物。
- 請求項1~9のいずれか1項に記載の樹脂組成物の硬化物からなる硬化膜。
- プリント配線板上に、請求項10に記載の硬化膜を備える硬化膜付きプリント配線板。
- 前記プリント配線板が可撓性を有する、請求項11に記載の硬化膜付きプリント配線板。
- 請求項1~9のいずれか1項に記載の樹脂組成物をプリント配線板の金属配線形成面に塗布して塗布膜を形成し、
前記塗布膜を加熱および/または露光することにより硬化する、硬化膜付きプリント配線板の製造方法。 - 請求項1~9のいずれか1項に記載の樹脂組成物をプリント配線板の金属配線形成面に塗布して塗布膜を形成し、
前記塗布膜の面内の少なくとも一部に活性光線を照射して光硬化を行い、
アルカリにより現像を行い、未硬化の前記塗布膜を溶解除去することにより、パターニングされた硬化膜を形成する、
硬化膜付きプリント配線板の製造方法。
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| CN201980068811.6A CN112888748B (zh) | 2018-10-19 | 2019-10-15 | 树脂组合物、固化膜、带固化膜的印刷电路板及其制造方法 |
| JP2020553189A JP7418343B2 (ja) | 2018-10-19 | 2019-10-15 | 樹脂組成物、硬化膜、硬化膜付きプリント配線板およびその製造方法 |
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| WO2025061749A1 (en) * | 2023-09-19 | 2025-03-27 | Tesa Se | Flame-retardant adhesive composition |
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| CN112888748A (zh) | 2021-06-01 |
| JP7418343B2 (ja) | 2024-01-19 |
| CN112888748B (zh) | 2023-09-22 |
| TW202028354A (zh) | 2020-08-01 |
| KR20210080436A (ko) | 2021-06-30 |
| JPWO2020080352A1 (ja) | 2021-09-30 |
| KR102776837B1 (ko) | 2025-03-10 |
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