WO2015046032A1 - ポリウレタン樹脂組成物およびこれを用いた接着剤組成物、積層体、プリント配線板 - Google Patents
ポリウレタン樹脂組成物およびこれを用いた接着剤組成物、積層体、プリント配線板 Download PDFInfo
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- WO2015046032A1 WO2015046032A1 PCT/JP2014/074793 JP2014074793W WO2015046032A1 WO 2015046032 A1 WO2015046032 A1 WO 2015046032A1 JP 2014074793 W JP2014074793 W JP 2014074793W WO 2015046032 A1 WO2015046032 A1 WO 2015046032A1
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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
- C08L75/06—Polyurethanes from polyesters
-
- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
-
- 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
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
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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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- 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
- C08K5/54—Silicon-containing compounds
-
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
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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
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/386—Improvement of the adhesion between the insulating substrate and the metal by the use of an organic polymeric bonding layer, e.g. adhesive
Definitions
- the present invention relates to a polyurethane resin composition excellent in adhesiveness to various plastic films and metals, heat resistance, moist heat resistance and flame retardancy, and an adhesive composition using the same.
- the present invention relates to a polyurethane resin composition and an adhesive composition suitable as an adhesive for flexible printed wiring boards.
- Adhesives are used in various fields, and due to diversification of purpose of use, further improvements in performance such as adhesiveness, heat resistance, moisture resistance, flame resistance, insulation reliability, and sheet life are required. .
- Adhesives for circuit boards such as flexible printed wiring boards (hereinafter abbreviated as FPC) used in electronic equipment are one of them, and mainly epoxy / nitrile rubber adhesives Epoxy / acryl butadiene adhesives, epoxy / polyvinyl butyral adhesives, acrylic adhesives, polyester urethane adhesives, and the like are used.
- adhesives used for FPC there are copper-clad laminate adhesives, coverlay adhesives, and reinforcing plate adhesives.
- electronic devices have become lighter, thinner, smaller, and higher in circuit density.
- the FPC has become more highly integrated and multi-layered. It is also used as an interlayer insulating material for bonding wiring surfaces together.
- Patent Document 1 proposes a flame retardant composed of a linear polymer compound, or a resin composition obtained by blending a flame retardant composed of the linear polymer with polystyrene, polycarbonate, polyethylene terephthalate, or the like.
- the resin composition of Patent Document 1 is excellent in flame retardancy, it is thermoplastic, and therefore has a problem of poor solder resistance and poor adhesion.
- the resin composition of Patent Document 2 also has a problem that it is inferior in adhesive strength and solder resistance although it is excellent in flame retardancy.
- the resin composition of Patent Document 3 a resin composition excellent in adhesive strength, solder resistance, and flame retardancy has been proposed.
- the resin composition of Patent Document 3 uses a large amount of a phosphorus compound that promotes the hydrolyzability of the resin, resulting in a problem that solder resistance after moisture absorption is lowered.
- the problem of the present invention is to improve each of the problems of these conventional adhesives, high adhesion to various plastic films and metals, high moisture and heat resistance that can be applied to solder after humidification, halogen and the like.
- An object is to provide a polyurethane resin composition having excellent flame retardancy without using antimony, and an adhesive composition, an adhesive layer, a laminate, and a printed wiring board using the same.
- this invention consists of the following structures.
- a polyurethane resin composition comprising a polyurethane resin (A) and an epoxy resin (B) satisfying the following (1) to (3): (1) A polyester polyol containing a phosphorus compound residue represented by Formula 1 or Formula 2 is included as a constituent component. (2) The acid value (unit: equivalent / 10 6 g) is 50 or more and 1000 or less ( 3) The urethane group concentration (unit: equivalent / 10 6 g) is 100 or more and 600 or less.
- R1 and R2 are each independently a hydrogen atom or a hydrocarbon group
- R3 and R4 are each independently a hydrogen atom, a hydrocarbon group, or a hydroxy group-substituted hydrocarbon group
- l and m are 0-4.
- It is an integer.
- R5 is a hydrogen atom or a hydrocarbon group
- R6 and R7 are each independently a hydrogen atom, a hydrocarbon group, or a hydroxy group-substituted hydrocarbon group.
- the acid value of the polyurethane resin (A) is AV (equivalent / 10 6 g), the compounding amount is AW (part by mass), the epoxy value BV (equivalent / 10 6 g) of the epoxy resin (B), and the compounding amount is BW (mass). Part), it is preferable to satisfy 0.7 ⁇ (BV ⁇ BW) / (AV ⁇ AW) ⁇ 3.0.
- an ion scavenger (C) is included.
- silane coupling agent (D) and / or silica (E) is included.
- the epoxy resin (B) is preferably an epoxy resin having a dicyclopentadiene skeleton.
- a laminate of an adhesive layer containing the adhesive composition and a film or metal A laminate of an adhesive layer containing the adhesive composition and a film or metal.
- a printed wiring board including the laminate A printed wiring board including the laminate.
- the polyurethane resin composition of the present invention has good adhesion to various plastic films and metals, flame retardancy, solder heat resistance, and insulation reliability under high temperature and high humidity.
- the polyurethane resin composition of the present invention is a thermosetting resin composition containing a polyurethane resin (A) and an epoxy resin (B).
- the blending amount of the polyurethane resin (A) and the epoxy resin (B) is not particularly limited, but the acid value of the polyurethane resin (A) is AV (unit: equivalent / 10 6 g), and the blending amount is AW (unit: parts by mass).
- the epoxy value of the epoxy resin (B) is BV (unit: equivalent / 10 6 g) and the blending amount is BW (unit: parts by mass)
- the following formula (1) 0.7 ⁇ (BV ⁇ BW) / (AV ⁇ AW) ⁇ 3.0 (1) It is preferable to satisfy. More preferably, it is 0.8 or more and 2.5 or less, More preferably, it is 0.9 or more and 2.0 or less.
- the crosslinking between the polyurethane resin (A) and the epoxy resin (B) tends to be insufficient and the heat resistance tends to decrease. If it exceeds 3.0, a large amount of unreacted epoxy resin is present. The heat resistance, moist heat resistance, and adhesiveness tend to decrease.
- an optional component such as a solvent may be contained, and it is particularly preferable to contain a solvent.
- the solvent is not particularly limited as long as it can dissolve the polyurethane resin (A) and the epoxy resin (B), and may be a single component or a mixed solvent of two or more components, and is particularly limited. Not. Examples of such solvents include amide solvents such as dimethylacetamide and N-methyl-2-pyrrolidone, alcohol solvents such as methanol, ethanol and isopropanol, aromatic solvents such as toluene and xylene, acetone, methyl ethyl ketone and cyclohexanone.
- Ketone solvents such as ethyl acetate, and the like. From the viewpoint of workability, toluene, xylene, methyl ethyl ketone, and ethyl acetate are preferable. From the viewpoint of ease of drying, toluene, methyl ethyl ketone, and ethyl acetate are more preferable. These solvents may be used alone or in combination of two or more. When the solvent is contained, the solid content concentration of the polyurethane resin composition is preferably 10% by mass or more and 50% by mass or less.
- the acid value (unit: equivalent / 10 6 g) of the polyurethane resin (A) used in the present invention is 50 or more and 100 or less.
- the acid value is less than 50 equivalents / 10 6 g, the adhesion to the metal-based substrate after curing becomes insufficient, the degree of crosslinking is low, and the heat resistance tends to decrease.
- the acid value exceeds 1000 equivalents / 10 6 g, the elastic modulus of the coating film after curing is increased, the solder resistance after humidification is reduced, and the crosslinking reaction of the adhesive layer is likely to proceed at room temperature, and is a stable sheet. There is a tendency that life cannot be obtained.
- the lower limit of the acid value is preferably 70 equivalents / 10 6 g, more preferably the lower limit of the acid value is 90 equivalents / 10 6 g, and still more preferably the lower limit of the acid value is 120 equivalents / 10 6 g.
- a preferred upper limit is 400 equivalents / 10 6 g, a more preferred upper limit is 370 equivalents / 10 6 g, a still more preferred upper limit is 3400 equivalents / 10 6 g, and a particularly preferred upper limit is 310 equivalents / 10 6 g.
- the urethane group concentration (unit: equivalent / 10 6 g) of the polyurethane resin (A) used in the present invention is 100 or more and 600 or less.
- the urethane group concentration is less than 100 equivalents / 10 6 g, the adhesion to a metal-based substrate or plastic substrate after curing tends to be insufficient.
- the urethane group concentration exceeds 600 equivalents / 10 6 g, the hygroscopicity tends to be high and the solder resistance after humidification tends to be lowered.
- the lower limit of the urethane group concentration is 150 equivalents / 10 6 g, more preferably the lower limit of the urethane group concentration is 200 equivalents / 10 6 g, and still more preferably the lower limit of the urethane group concentration is 250 equivalents / 10 6 g.
- a preferred upper limit is 550 equivalents / 10 6 g, a more preferred upper limit is 500 equivalents / 10 6 g, and a more preferred upper limit is 450 equivalents / 10 6 g.
- the number average molecular weight of the polyurethane resin (A) used in the present invention is preferably 5 ⁇ 10 3 or more and 1 ⁇ 10 5 or less. If the number average molecular weight is less than 5 ⁇ 10 3 , adhesion immediately after coating may be insufficient and workability may deteriorate, and if the number average molecular weight exceeds 1 ⁇ 10 5 , the solution viscosity at the time of coating is too high. Thus, a uniform coating film may not be obtained.
- a more preferred number average molecular weight is 8 ⁇ 10 3 or more, and a more preferred number average molecular weight is 1 ⁇ 10 4 or more. Moreover, a more preferable number average molecular weight is 7 ⁇ 10 4 or less, and a more preferable number average molecular weight is 5 ⁇ 10 4 or less.
- the glass transition temperature of the polyurethane resin (A) used in the present invention is preferably ⁇ 20 ° C. or higher and 100 ° C. or lower.
- the glass transition temperature is less than ⁇ 20 ° C., the cohesive force is lowered, and the adhesiveness and solder resistance at high temperatures may be insufficient.
- the glass transition temperature exceeds 100 ° C., the modulus of elasticity near room temperature increases, the adhesiveness with the base material decreases, the adhesiveness at room temperature decreases, and the flexibility of the adhesive layer decreases. There is a tendency for workability to deteriorate due to cracking or peeling off of the coating film during the manufacturing process.
- the lower limit of the glass transition temperature is ⁇ 10 ° C., more preferably the lower limit of the glass transition temperature is 0 ° C.
- a preferable upper limit is 80 ° C., and a more preferable upper limit is 60 ° C.
- the polyurethane resin (A) used in the present invention may contain a phosphorus atom in the molecular chain by introducing a monomer having a phosphorus atom by copolymerization or modification in order to impart flame retardancy without using halogen or antimony. It is essential.
- the amount of phosphorus atoms contained is preferably 0.5% by mass or more and 6.5% by mass or less, more preferably 1.0% by mass or more and 6.0% by mass or less, based on the weight of the polyurethane resin (A). Preferably they are 1.5 mass% or more and 5.5 mass% or less, Most preferably, they are 2.0 mass% or more and 5.0 mass% or less.
- a general method is used as a method for introducing a phosphorus atom into the polyurethane resin (A).
- a general method is used.
- a polyester polyol obtained by copolymerizing a phosphorus compound represented by the above general formula 1 or 2 is used as a urethane resin.
- the method used as a component is preferred.
- R1 and R2 are preferably hydrogen atoms or hydrocarbon groups.
- the hydrocarbon group is not particularly limited, but is preferably an aliphatic hydrocarbon or aromatic hydrocarbon having 1 to 10 carbon atoms which may have a substituent. A more preferable carbon number is 1-6. Specific examples include, but are not limited to, methyl group, ethyl group, propyl group, phenyl group and the like.
- R1 and R2 may be the same or different.
- R3 and R4 are preferably a hydrogen atom, a hydrocarbon group or a hydroxy group-substituted hydrocarbon group.
- the hydrocarbon group is not particularly limited, but is preferably an aliphatic hydrocarbon or aromatic hydrocarbon having 1 to 10 carbon atoms which may have a substituent.
- a more preferable carbon number is 1-7. Specific examples include, but are not limited to, methyl group, ethyl group, propyl group, butyl group, phenyl group, benzyl group and the like.
- the hydroxy group-substituted hydrocarbon group is not particularly limited, but is preferably a hydroxy group-substituted aliphatic hydrocarbon or hydroxy group-substituted aromatic hydrocarbon having 1 to 10 carbon atoms. A more preferable carbon number is 1-6.
- R3 and R4 may be the same or different.
- R5 is preferably a hydrogen atom or a hydrocarbon group.
- the hydrocarbon group is not particularly limited, but is preferably an aliphatic hydrocarbon or aromatic hydrocarbon having 1 to 10 carbon atoms which may have a substituent.
- a more preferable carbon number is 1-6. Specific examples include, but are not limited to, methyl group, ethyl group, propyl group, phenyl group and the like.
- R6 and R7 are preferably a hydrogen atom, a hydrocarbon group or a hydroxy group-substituted hydrocarbon group.
- the hydrocarbon group is not particularly limited, but is preferably an aliphatic hydrocarbon or aromatic hydrocarbon having 1 to 10 carbon atoms which may have a substituent. A more preferable carbon number is 1-7.
- hydroxy group-substituted hydrocarbon group is not particularly limited, but is preferably a hydroxy group-substituted aliphatic hydrocarbon or hydroxy group-substituted aromatic hydrocarbon having 1 to 10 carbon atoms. A more preferable carbon number is 1-6.
- Specific examples include, but are not limited to, 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 4-hydroxybutyl, 2-hydroxyethyloxyethyl groups, and the like.
- R6 and R7 may be the same or different.
- the total amount of all acid components excluding the phosphorus compound represented by the general formula 1 or 2 is 100 mol%.
- the aromatic carboxylic acid content is preferably 60 mol% or more, more preferably 85 mol% or more, still more preferably 90 mol% or more, particularly preferably 95 mol% or more, and most preferably 99 mol%. % Or more.
- Aromatic carboxylic acid may occupy 100 mol%. When the aromatic carboxylic acid is less than 60 mol%, the cohesive strength of the coating film is weak, and the adhesive strength to various substrates may be reduced, and the insulation reliability and adhesive strength may be reduced in a high temperature and high humidity environment.
- aromatic carboxylic acids are not particularly limited, but examples include aromatic dicarboxylic acids such as terephthalic acid, isophthalic acid, orthophthalic acid, naphthalenedicarboxylic acid, biphenyldicarboxylic acid, diphenic acid, and 5-hydroxyisophthalic acid. it can.
- aromatic dicarboxylic acids having a sulfonic acid group such as sulfoterephthalic acid, 5-sulfoisophthalic acid, 4-sulfophthalic acid, 4-sulfonaphthalene-2,7-dicarboxylic acid, and 5- (4-sulfophenoxy) isophthalic acid. Examples thereof include acids, their metal salts, and ammonium salts.
- aromatic oxycarboxylic acids such as p-hydroxybenzoic acid, p-hydroxyphenylpropionic acid, p-hydroxyphenylacetic acid, 6-hydroxy-2-naphthoic acid and 4,4-bis (p-hydroxyphenyl) valeric acid Etc.
- terephthalic acid, isophthalic acid, and a mixture thereof are particularly preferable in terms of increasing the cohesive strength of the coating film.
- acid components include 1,4-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid and its anhydride, alicyclic dicarboxylic acids, succinic acid, adipic acid And aliphatic dicarboxylic acids such as azelaic acid, sebacic acid, dodecanedioic acid and dimer acid.
- the glycol component used in the polyester polyol containing a phosphorus compound residue is not particularly limited, but aliphatic glycol, alicyclic glycol, aromatic-containing glycol, or ether bond-containing glycol can be used. It is preferable to use it.
- aliphatic glycol examples include, but are not limited to, ethylene glycol, 1,2-propylene glycol, 1,3-propanediol, 1,4-butanediol, 2-methyl-1,3-propanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, 1,9-nonanediol, 2-ethyl-2-butyl-1,3-propanediol Hydroxypivalic acid neopentyl glycol ester, dimethylol heptane, 2,2,4-trimethyl-1,3-pentanediol and the like.
- alicyclic glycols include, but are not limited to, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, tricyclodecanediol, tricyclodecane dimethylol, spiroglycol, hydrogenated bisphenol A, Examples thereof include ethylene oxide adducts and propylene oxide adducts of hydrogenated bisphenol A.
- ether bond-containing glycols include, but are not limited to, diethylene glycol, triethylene glycol, dipropylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, neopentyl glycol ethylene oxide adduct, neopentyl glycol.
- Examples thereof include propylene oxide adducts.
- the aromatic-containing glycol include, but are not limited to, para-xylene glycol, meta-xylene glycol, ortho-xylene glycol, 1,4-phenylene glycol, 1,4-phenylene glycol ethylene oxide adduct, bisphenol A, Examples thereof include glycols obtained by adding 1 to several moles of ethylene oxide or propylene oxide to two phenolic hydroxyl groups of bisphenols such as ethylene oxide adduct and propylene oxide adduct of bisphenol A. These glycol components can be used alone or in combination of two or more.
- an oxycarboxylic acid compound having a hydroxyl group and a carboxyl group in the molecular structure can be used as a polyester raw material.
- the polyester polyol containing a phosphorus compound residue used as a raw material for the polyurethane resin (A) used in the present invention is a polyfunctional polyfunctional compound having a functionality of 0.1 mol% or more and 5 mol% or less for the purpose of introducing a branched skeleton if necessary.
- Carboxylic acids and / or polyols may be copolymerized.
- the terminal group concentration (reaction point) of the resin is increased, and the crosslinking density can be controlled.
- Examples of the tri- or higher functional polycarboxylic acid in that case are not particularly limited, but include trimellitic acid, trimesic acid, ethylene glycol bis (anhydrotrimellitate), glycerol tris (anhydrotrimellitate), Mellitic acid, pyromellitic anhydride (PMDA), oxydiphthalic dianhydride (ODPA), 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride (BTDA), 3,3 ′, 4,4 ′ -Diphenyltetracarboxylic dianhydride (BPDA), 3,3 ', 4,4'-diphenylsulfonetetracarboxylic dianhydride (DSDA), 4,4'-(hexafluoroisopropylidene) diphthalic dianhydride (6FDA), 2,2′-bis [(dicarboxyphenoxy) phenyl] propane dianhydride (BSAA), etc.
- trimellitic acid trim
- Thing or the like can be used.
- examples of the tri- or higher functional polyol are not particularly limited, but glycerin, trimethylolethane, trimethylolpropane, pentaerythritol and the like can be used.
- a tri- or higher functional polycarboxylic acid and / or polyol it is 0.1 mol% or more and 5 mol% or less, preferably 0.1 mol% or more and 3 mol%, based on the total acid component or the total glycol component.
- the copolymerization is preferably carried out in the following range, and if it exceeds 5 mol%, mechanical properties such as elongation at break of the coating film may be lowered, and gelation may occur during the polymerization.
- Examples of the method of introducing an acid value into a polyester polyol containing a phosphorus compound residue used as a raw material for the polyurethane resin (A) used in the present invention include a method of introducing a carboxylic acid into the resin by acid addition after polymerization.
- a monocarboxylic acid, dicarboxylic acid, or polyfunctional carboxylic acid compound is used for acid addition, the molecular weight may be reduced by transesterification, and it is preferable to use a compound having at least one carboxylic acid anhydride.
- the acid anhydride is not particularly limited, but succinic anhydride, maleic anhydride, phthalic anhydride, 2,5-norbornene dicarboxylic acid anhydride, tetrahydrophthalic anhydride, trimellitic anhydride, pyromellitic anhydride (PMDA) , Oxydiphthalic dianhydride (ODPA), 3,3 ′, 4,4′-benzophenone tetracarboxylic dianhydride (BTDA), 3,3 ′, 4,4′-diphenyltetracarboxylic dianhydride (BPDA) ), 3,3 ′, 4,4′-diphenylsulfonetetracarboxylic dianhydride (DSDA), 4,4 ′-(hexafluoroisopropylidene) diphthalic dianhydride (6FDA), 2,2′-bis Compounds such as [(dicarboxyphenoxy) phenyl] propane dianhydride (BSAA) can be used
- the total acid component constituting the polyester polyol containing the phosphorus compound residue used in the present invention is 100 mol%, it is preferably used in a range of less than 10 mol%.
- the acid addition includes a method of directly performing in a bulk state after the polyester polycondensation and a method of adding the polyester in a solution.
- the reaction in the bulk state is fast, but if it is added in a large amount, gelation may occur, and since the reaction is performed at a high temperature, care such as blocking oxygen gas and preventing oxidation is necessary.
- the addition in the solution state is slow, but a large amount of carboxyl groups can be stably introduced.
- the polyester polyol containing a phosphorus compound residue used as a raw material for the polyurethane resin (A) used in the present invention is copolymerized with lactone monomers such as ⁇ -propiolactone, ⁇ -butyrolactone, ⁇ -valerolactone, and ⁇ -caprolactone. I can do it. From the versatility of the raw materials, ⁇ -caprolactone is preferable, and the copolymerization method is preferably a method in which a lactone monomer is charged in a bulk state after polycondensation and ring-opening polymerization is performed on a polyester resin.
- the number average molecular weight of the polyester polyol containing a phosphorus compound residue used as a raw material for the polyurethane resin (A) used in the present invention is preferably 3 ⁇ 10 3 or more and 3 ⁇ 10 4 or less.
- the number average molecular weight is less than 3 ⁇ 10 3 , the number average molecular weight of the polyurethane resin (A) becomes small, the adhesion immediately after coating is insufficient, and workability may be deteriorated.
- the number average molecular weight exceeds 3 ⁇ 10 4 , it is difficult and practical to control the molecular weight during polymerization of polyurethane.
- a more preferred number average molecular weight is 4 ⁇ 10 3 or more, and a more preferred number average molecular weight is 5 ⁇ 10 3 or more.
- a more preferred number average molecular weight is 2.5 ⁇ 10 4 or less, and a more preferred number average molecular weight is 2 ⁇ 10 4 or less.
- a polyester polyol, a polyether polyol, a polycarbonate polyol, etc. as a polyol component not containing phosphorus other than the polyester polyol containing the above phosphorus compound residue, It can also be used in combination with a polyester polyol containing a phosphorus compound residue.
- the polyurethane resin (A) used in the present invention preferably uses a polyisocyanate and a chain extender in addition to the polyester polyol containing the phosphorus compound residue as a raw material.
- a method for introducing an acid value a method of previously giving an acid value to a polyester polyol containing a phosphorus compound residue constituting a polyurethane resin, or a diol containing a carboxylic acid as a chain extender is used. There are methods. From the viewpoint of easy adjustment of the acid value and molecular weight, the latter is preferably used or used in combination.
- the polyisocyanate used in the production of the polyurethane resin (A) used in the present invention is one of diisocyanate, its dimer (uretdione), its trimer (isocyanurate, triol adduct, burette), or the like. It may be a mixture of seeds or more.
- the diisocyanate component includes 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, p-phenylene diisocyanate, 4,4′-diphenylmethane diisocyanate (hereinafter also referred to as MDI), m- Phenylene diisocyanate, hexamethylene diisocyanate (hereinafter also referred to as HDI), tetramethylene diisocyanate, 3,3′-dimethoxy-4,4′-biphenylene diisocyanate, 1,5-naphthalene diisocyanate, 2,6-naphthalene diisocyanate, 4,4 '-Diisocyanate diphenyl ether, 1,5-xylylene diisocyanate, 1,3-diisocyanate methylcyclohexane, 1,4-diisocyanate methylcyclohexane, 4,4'-di Socia sulfonates cycl
- the chain extender is not particularly limited, but is aliphatic glycol, alicyclic glycol, aromatic-containing glycol, ether bond-containing glycol, carboxylic acid-containing glycol, or a tri- or higher functional polyol.
- aliphatic glycol examples include, but are not limited to, ethylene glycol, 1,2-propylene glycol, 1,3-propanediol, 1,4-butanediol, 2-methyl-1,3-propanediol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, 1,9-nonanediol, 2-ethyl-2-butyl-1,3-propanediol Hydroxypivalic acid neopentyl glycol ester, dimethylol heptane, 2,2,4-trimethyl-1,3-pentanediol and the like.
- alicyclic glycols include, but are not limited to, 1,4-cyclohexanediol, 1,4-cyclohexanedimethanol, tricyclodecanediol, tricyclodecane dimethylol, spiroglycol, hydrogenated bisphenol A, Examples thereof include ethylene oxide adducts and propylene oxide adducts of hydrogenated bisphenol A.
- ether bond-containing glycols include, but are not limited to, diethylene glycol, triethylene glycol, dipropylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, neopentyl glycol ethylene oxide adduct, neopentyl glycol.
- Examples thereof include propylene oxide adducts.
- the aromatic-containing glycol include, but are not limited to, para-xylene glycol, meta-xylene glycol, ortho-xylene glycol, 1,4-phenylene glycol, 1,4-phenylene glycol ethylene oxide adduct, bisphenol A, Examples thereof include glycols obtained by adding 1 to several moles of ethylene oxide or propylene oxide to two phenolic hydroxyl groups of bisphenols such as ethylene oxide adduct and propylene oxide adduct of bisphenol A.
- carboxylic acid-containing glycols include, but are not limited to, compounds having one carboxylic acid and two hydroxyl groups such as dimethylolpropionic acid (hereinafter also referred to as DMPA) and dimethylolbutanoic acid (hereinafter also referred to as DMBA).
- DMPA dimethylolpropionic acid
- DMBA dimethylolbutanoic acid
- Etc examples of the tri- or higher functional polyol include, but are not limited to, glycerin, trimethylolethane, trimethylolpropane, pentaerythritol and the like. Among them, dimethylolpropionic acid and dimethylolbutanoic acid are preferable from the viewpoint of easy introduction and adjustment of the acid value. Further, as a method for introducing a branch, use of trimethylolpropane is also preferable. These chain extenders can be used alone or in combination of two or more.
- the polyester polyol containing the phosphorus compound residue and the polyisocyanate, and if necessary, the chain extender may be charged all at once into the reaction vessel or divided. You may charge.
- the ratio of isocyanate group / functional group of hydroxyl group is 1 or less with respect to the total of the hydroxyl value of the polyester polyol and chain extender in the system and the total of the isocyanate group of the polyisocyanate.
- this reaction can be performed by making it react in presence or absence of a solvent inactive with respect to an isocyanate group.
- the solvents include ester solvents (ethyl acetate, butyl acetate, ethyl butyrate, etc.), ether solvents (dioxane, tetrahydrofuran, diethyl ether, etc.), ketone solvents (cyclohexanone, methyl ethyl ketone, methyl isobutyl ketone, etc.), aromatic carbonization.
- ester solvents ethyl acetate, butyl acetate, ethyl butyrate, etc.
- ether solvents dioxane, tetrahydrofuran, diethyl ether, etc.
- ketone solvents cyclohexanone, methyl ethyl ketone, methyl isobutyl ketone, etc.
- aromatic carbonization examples thereof include hydrogen-based solvents (benzene, toluene, xylene, etc.) and mixed solvents thereof, and ethy
- Catalysts used in ordinary urethane reactions to promote urethane reactions such as tin catalysts (trimethyltin laurate, dimethyltin dilaurate, dibutyltin dilaurate, trimethyltin hydroxide, dimethyltin dihydroxide, stannous octoate, etc.) , Lead catalysts (red oleate, red-2-ethylhexoate, etc.), zinc catalysts, zirconium catalysts, bismuth catalysts, amine catalysts (triethylamine, tributylamine, morpholine, diazabicyclooctane, diazabicyclo) Undecene etc.) can be used, but amine-based catalysts are preferred from the standpoint of toxicity.
- tin catalysts trimethyltin laurate, dimethyltin dilaurate, dibutyltin dilaurate, trimethyltin hydroxide, dimethyltin dihydroxide
- thermoplastic resin other than the polyurethane resin (A) may be blended within a range that does not impair the characteristics of the present invention.
- the thermoplastic resin is not particularly limited, but polyester resin, styrene resin, polyamide resin, polyamideimide resin, polyesterimide resin, polycarbonate resin, polyphenylene oxide resin, vinyl resin, olefin resin and An acrylic resin etc. are mentioned, These thermoplastic resins may be used individually by 1 type, or may use 2 or more types together.
- the polyurethane resin composition of the present invention contains an epoxy resin (B) as an essential component in addition to the polyurethane resin (A), and forms a crosslink with the polyurethane resin (A). It becomes a thermosetting resin composition by a crosslinking reaction, and exhibits high heat resistance and high adhesion to a polyimide film or copper foil.
- epoxy resin (B) used for this invention For example, bisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, bisphenol S diglycidyl ether, bisphenol F diglycidyl ether, dicyclopentadiene, novolak Glycidyl ether types such as glycidyl ether and phenol novolak; orthophthalic acid diglycidyl ester, isophthalic acid diglycidyl ester, terephthalic acid diglycidyl ester, tetrahydrophthalic acid diglycidyl ester, adipic acid diglycidyl ester, sebacic acid diglycidyl ester, tri Glycidyl ester such as melicic acid triglycidyl ester, hexahydrophthalic acid glycidyl ester, dimer acid glycidyl ester Glycidylamines such as triglycidyl iso
- the epoxy resin (B) used in the present invention preferably further contains an epoxy resin having a dicyclopentadiene skeleton.
- the cured coating film has a very low moisture absorption rate due to the rigid dicyclopentadiene skeleton, and the crosslink density of the cured coating film can be lowered to relieve stress at the time of peeling. This is preferable because the insulation reliability in a high temperature and high humidity environment can be improved.
- the amount of the epoxy resin having a dicyclopentadiene skeleton is preferably 30% by mass or more, more preferably 50% by mass or more, and further preferably 70% by mass or more of the entire epoxy resin (B) contained in the polyurethane resin composition. . Although it does not specifically limit as a specific example of the epoxy resin which has such a dicyclopentadiene frame
- the polyurethane resin composition of the present invention may further contain an epoxy resin containing a nitrogen atom as the epoxy resin (B).
- an epoxy resin containing a nitrogen atom the adhesive layer can be made into a semi-cured state (hereinafter also referred to as B stage) by heating at a relatively low temperature for a short time, and the flow of the adhesive layer Therefore, the adhesive layer tends to be prevented from overflowing and flowing out during pressing, and workability tends to be improved. Moreover, the effect which suppresses the foaming at the time of a press can be anticipated, and it is preferable.
- the epoxy resin containing a nitrogen atom is not particularly limited.
- tetraglycidyldiaminodiphenylmethane triglycidylparaaminophenol
- tetraglycidylbisaminomethylcyclohexanone N, N, N ′, N′-tetraglycidyl-m-xylene
- examples thereof include glycidylamines such as diamines. It is preferable that the compounding quantity of these epoxy resins containing a nitrogen atom is 20 mass% or less of the whole epoxy resin (B) contained in a polyurethane resin composition. When the amount is more than 20% by mass, the rigidity becomes excessively high and the adhesiveness tends to be lowered.
- the upper limit of the more preferable amount is 10 mass%, More preferably, it is 6 mass% or less.
- a curing catalyst can be used for the curing reaction of the polyurethane resin (A) and the epoxy resin (B).
- the curing catalyst is not particularly limited.
- 2-methylimidazole, 1,2-dimethylimidazole, 2-ethyl-4-methylimidazole, 2-phenyl-4-methylimidazole, or 1-cyanoethyl-2-ethyl- Imidazole compounds such as 4-methylimidazole, triethylamine, triethylenediamine, N′-methyl-N- (2-dimethylaminoethyl) piperazine, 1,8-diazabicyclo (5,4,0) -undecene-7, 1 , 5-diazabicyclo (4,3,0) -5-nonene, or 6-dibutylamino-1,8-diazabicyclo (5,4,0) -7-undecene, and their tertiary amines Compounds converted into amine salts with 2-methylimid
- curing catalysts can be used alone or in combination of two or more.
- the compounding amount at that time is preferably 0.01 to 1.0 part by mass with respect to 100 parts by mass of the polyurethane resin (A). If it is this range, the catalytic effect with respect to reaction of a polyurethane resin (A) and an epoxy resin (B) will increase further, and the firm adhesive performance can be obtained.
- the ion scavenger (C) is an inorganic compound such as zirconium, antimony, titanium, tin, bismuth, aluminum, magnesium, rare earth, or hydrotalcite compound, triazole compound, tetrazole compound, Examples thereof include organic compounds such as bipyridyl compounds, quinol compounds, hydroxyanthraquinone compounds, polyphenol compounds, carboxyl group-containing aromatic compounds, or carboxyl group-containing aliphatic compounds.
- Aluminum-based, magnesium-based, or hydrotalcite-based compounds are preferred because they are excellent in the ability to trap copper ions, chloride ions, and phosphate ions and do not contain heavy metals that have an adverse effect on the environment.
- These ion scavengers (C) may be used alone or in combination of two or more.
- rare earths include lanthanum oxide, gadolinium oxide, samarium oxide, thulium oxide, europium oxide, neodymium oxide, erbium oxide, terbium oxide, praseodymium oxide, dysprodium oxide, yttrium oxide, ytterbium oxide, holmium oxide, and the like.
- mixture containing aluminum, magnesium, hydrotalcite compound and hydrotalcite compound conventionally known ones can be used. Specific examples include, but are not limited to, IXE (registered trademark) -700, 700F, 770, 770D, IXEPLAS (registered trademark) -A1, A2 manufactured by Toa Gosei Co., Ltd. (Registered trademark) 300, 500, 1000, 2000, DHT-4A (registered trademark), 6 and the like.
- an addition amount of the ion-trapping agent (C) contained in this invention It is preferable that it is 0.5 to 10 mass parts with respect to 100 mass parts of polyurethane resins (A). If the addition amount is less than 0.5 parts by mass, sufficient ion trapping effect may not be exhibited, and the insulation reliability in a high temperature and high humidity environment may decrease. If the addition amount exceeds 10 parts by mass, adhesion and solder resistance There is a possibility that the appearance abnormality may occur under the deterioration of property and high temperature and high humidity environment. More preferably, they are 1 mass part or more and 8 mass parts or less, More preferably, they are 1.5 mass parts or more and 6 mass parts or less.
- the ion scavenger (C) included in the present invention it is preferable to mix and disperse sufficiently using a mill, a mixer, a paint shaker, or the like, if necessary.
- a mill a mixer, a paint shaker, or the like
- the mixing and dispersing method There is no particular limitation on the mixing and dispersing method as long as it can be sufficiently mixed and dispersed.
- ⁇ Silane coupling agent (D)> You may mix
- the silane coupling agent having an unsaturated group is not particularly limited, and examples thereof include vinyltris ( ⁇ -methoxyethoxy) silane, vinyltriethoxysilane, and vinyltrimethoxysilane.
- the silane coupling agent having a glycidyl group is not particularly limited.
- silane coupling agent having an amino group is not particularly limited, and examples thereof include N- ⁇ - (aminoethyl) - ⁇ -aminopropyltrimethoxysilane and N- ⁇ - (aminoethyl) - ⁇ -aminopropylmethyldimethoxy.
- Examples include silane, N-phenyl- ⁇ -aminopropyltrimethoxysilane, and the like.
- These silane coupling agents (D) can be used alone or in combination of two or more.
- glycidyl such as ⁇ -glycidoxypropyltrimethoxysilane, ⁇ - (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and ⁇ - (3,4-epoxycyclohexyl) ethyltriethoxysilane from the viewpoint of heat resistance.
- a silane coupling agent having a group is more preferable.
- the addition amount of the silane coupling agent (D) contained in this invention it is preferable that they are 1 mass part or more and 10 mass parts or less with respect to 100 mass parts of polyurethane resins (A). If the amount added is less than 1 part by mass, the effect of improving the adhesiveness and heat resistance may not be achieved. If the amount added exceeds 10 parts by mass, the amount of methanol and ethanol generated increases due to hydrolysis, Heat resistance may decrease. More preferably, it is 1.5 to 8 mass parts, More preferably, it is 2 to 6 mass parts.
- silica (E) When the polyurethane resin composition of the present invention contains silica (E), it is preferable from the viewpoints of stabilization of adhesive strength, improvement of mechanical properties, improvement of moisture absorption resistance, and improvement of heat resistance.
- Silica (E) is not particularly limited, but fumed silica having a three-dimensional network structure is particularly preferable from the viewpoint of imparting transparency, mechanical properties, heat resistance, and thixotropy of the polyurethane resin composition.
- hydrophobic silica treated with monomethyltrichlorosilane, dimethyldichlorosilane, hexamethyldisilazane, octylsilane, silicone oil or the like is more preferable for imparting hydrophobicity.
- the average diameter of the primary particles is preferably 30 nm or less, and more preferably 25 nm or less.
- the average primary particle diameter referred to here is an average value of equivalent circle diameters of 100 particles randomly extracted from a primary particle image obtained using a scanning electron microscope.
- addition amount of the silica (E) contained in this invention It is preferable that they are 5 mass parts or more and 30 mass parts or less with respect to 100 mass parts of polyurethane resins (A). If the amount added is less than 5 parts by mass, the mechanical properties, moisture absorption resistance, and heat resistance may not be improved. If the amount exceeds 30 parts by mass, the adhesion and processing suitability may deteriorate. There is. More preferably, they are 8 mass parts or more and 25 mass parts or less, More preferably, they are 10 mass parts or more and 20 mass parts or less.
- the polyurethane resin composition of the present invention if necessary, brominated, phosphorous, nitrogen-based, flame retardant aids such as metal hydroxide compounds, flame retardants, thermal stabilizers, antioxidants, inorganic fillers, lubricants, Additives such as leveling agents, pigments, and dyes can be appropriately blended.
- the polyurethane resin composition of the present invention can further enhance the flame retardant effect by using a flame retardant together.
- Various flame retardants can be used. From the viewpoint of achieving both performance and environmental impact, a phosphorus flame retardant, a nitrogen flame retardant, or a metal hydroxide compound flame retardant is preferred.
- These flame retardants include, for example, organic phosphorus flame retardants such as phosphate esters, phosphate amides and organic phosphine oxides, red phosphorus, ammonium polyphosphate, phosphazene, phosphinic acid derivatives, triazines, melamine cyanurates and the like.
- metal salt flame retardants such as organic phosphinic acid metal salts, hydrated metal flame retardants such as aluminum hydroxide and magnesium hydroxide, and other inorganic flame retardants.
- organic phosphinic acid metal salts, phosphazenes, and phosphinic acid derivatives are more preferred, and these may be used alone or in combination of two or more.
- Clariant Co., Ltd For example, Clariant Co., Ltd.
- Exolit (trademark) OP series is mention
- a phosphazene cyclic phenoxyphosphazene (Otsuka Chemical ( Product name: SPB-100, 100L, SPE-100), Cyclic cyanophenoxyphosphazene (Fushimi Pharmaceutical Co., Ltd., product name: FP-300), Cyclic hydroxyphenoxyphosphazene (Otsuka Chemical Co., Ltd.)
- the phosphinic acid derivative is preferably a phenanthrene-type phosphinic acid derivative, such as 9,10-dihydro-9-oxa-10 phosphaphenanthrene-10-oxide (Sanko).
- antioxidant is effective in improving adhesiveness and adhesive strength retention at high temperatures and high temperatures and high humidity.
- examples of the antioxidant include hindered phenol and phosphorus antioxidants. Specifically, 1,3,5-tris (3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate, 1,1,3-tri (4-hydroxy-2-) as a hindered phenol type Methyl-5-tert-butylphenyl) butane, 1,1-bis (3-tert-butyl-6-methyl-4-hydroxyphenyl) butane, 3,5-bis (1,1-dimethylethyl) -4- Hydroxy-benzenepropanoic acid, pentaerythritol tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, 3- (1,1-dimethylethyl) -4-hydroxy-5 Methyl-benzenepropanoic acid, 3,9-bis
- inorganic fillers examples include alumina, titania, tantalum oxide, zirconia, silicon nitride, barium titanate, barium carbonate, lead titanate, lead zirconate titanate, lead lanthanum zirconate titanate, gallium oxide, Spinel, mullite, cordierite, talc, aluminum hydroxide, magnesium hydroxide, aluminum titanate, yttria-containing zirconia, barium silicate, boron nitride, calcium carbonate, calcium sulfate, zinc oxide, zinc borate, magnesium titanate, Magnesium borate, barium sulfate, organic bentonite, carbon, and the like can be used, and these may be used alone or in combination of two or more.
- the compounding amount of the inorganic filler is preferably 20 parts by mass or less, more preferably 15 parts by mass or less, and further preferably 10 parts by mass or less with respect to 100 parts by mass of the polyurethane resin (A). If it exceeds 20 parts by mass, the adhesion and processing suitability may deteriorate.
- the adhesive composition of the present invention is a composition containing the polyurethane resin composition. Moreover, it mix
- an adhesive bond layer means the layer of the adhesive composition after apply
- the adhesive layer at least a part of the polyurethane resin (A), the epoxy resin (B), and the reaction product derived therefrom reacting in the adhesive composition reacts to form a semi-cured state (hereinafter also referred to as a B-stage state). ) Is preferable.
- the method for coating the base material 1 with the adhesive composition is not particularly limited, and examples thereof include a comma coater, a reverse roll coater, and a die coater. Moreover, it can also coat directly or by the transfer method to the rolled copper foil which is a printed wiring board constituent material, or a polyimide film as needed.
- the thickness of the adhesive layer after drying can be appropriately set as necessary, but is preferably in the range of 5 to 200 ⁇ m. When the thickness of the adhesive layer is less than 5 ⁇ m, the adhesive strength may be insufficient.
- drying conditions are not particularly limited, but the residual solvent ratio after drying is preferably 4% or less. If it exceeds 4%, there is a problem that the residual solvent is foamed at the time of pressing the printed wiring board to cause swelling.
- the adhesive layer can be used even if it is peeled off from the base material 1 and the adhesive layer is used alone, or may remain attached to the base material 1. When the base material 1 is still attached, it is referred to as a laminate.
- the laminate may be a two-layer laminate of the substrate 1 and the adhesive layer, or may be a three-layer laminate in which the substrate 2 is bonded.
- the laminate When it is a three-layer laminate, it can be rolled up without causing any back-off to the substrate, and it is excellent in operability, and since the adhesive layer is protected, it is excellent in storability and easy to use.
- the substrate 1 and the substrate 2 that can be used in the present invention are not particularly limited, and examples thereof include a film-like resin, a metal plate, a metal foil, and papers.
- the film-like resin include polyester resin, polyamide resin, polyimide resin, polyamideimide resin, and olefin resin.
- an insulating film-like resin is particularly preferred for coverlay applications.
- metal plate and metal foil materials include various metals such as SUS, copper, aluminum, iron, and zinc, and alloys and plated products thereof. Glassine paper etc. can be illustrated. Moreover, glass epoxy etc. can be illustrated as a composite material.
- a coating layer of a sealant such as clay, polyethylene, polypropylene, etc. is provided on both sides of paper such as fine paper, kraft paper, roll paper, glassine paper.
- a coating layer of a sealant such as clay, polyethylene, polypropylene, etc.
- Those coated with an alkyd release agent, and various olefin films such as polyethylene, polypropylene, polymethylpentene, ethylene- ⁇ -olefin copolymer, propylene- ⁇ -olefin copolymer, polyethylene terephthalate, etc.
- a film obtained by applying the release agent on the above film can also be used.
- Polyester resin, polyamide resin, polyimide resin, polyamideimide resin, SUS steel plate, copper foil, aluminum plate, and glass epoxy are preferable from the viewpoint of adhesive strength with the adhesive composition and durability.
- the base material 1 and the base material 2 may be of the same type or different. Moreover, you may laminate
- the substrate 1 is a polyimide resin and the substrate 2 is copper.
- the thickness of the substrate 1 and the substrate 2 is not particularly limited, but is preferably 1 to 200 ⁇ m. Moreover, when the base material 1 or the base material 2 is metal foil, preferable thickness is 1 micrometer or more, More preferably, it is 3 micrometers or more, More preferably, it is 5 micrometers or more. Moreover, it is preferably 50 ⁇ m or less, more preferably 30 ⁇ m or less, and still more preferably 20 ⁇ m or less.
- the metal foil is usually provided in the form of a roll.
- the form of the metal foil used when manufacturing the printed wiring board of this invention is not specifically limited.
- its length is not particularly limited.
- the width is not particularly limited, but is preferably about 250 to 5000 mm.
- the substrate 2 is bonded and then cured by heat treatment.
- the conditions for the heat treatment are not particularly limited, but are preferably 120 to 180 ° C. for 1 to 5 hours.
- the printed wiring board in the present invention includes the laminate as a constituent element.
- a printed wiring board is not specifically limited, For example, it is what was manufactured by conventionally well-known methods, such as a subtractive method and an additive method, using a laminated body, what is called a flexible circuit board (FPC), a flat cable, and a tape automated. It is a general term for circuit boards for bonding (TAB).
- the FPC in the present invention includes those reinforced with a reinforcing material and those not reinforced with a reinforcing material. When reinforcing with a reinforcing material, a reinforcing material and an adhesive layer are provided under the base material 1 or the base material 2.
- a reinforcing material The board (glass epoxy board) etc. which hardened
- the laminate of the substrate 1 and the adhesive can be used for a coverlay film.
- a coverlay film For example, after being stored in the form of rolls, they are bonded together to produce a printed wiring board.
- Arbitrary methods can be used as a method of bonding, for example, it can bond using a press or a roll. Further, the two can be bonded together while heating by a method such as using a heating press or a heating roll device.
- the polyurethane resin composition of the present invention can be suitably used for each adhesive layer of a printed wiring board.
- the polyurethane resin composition of the present invention when used as an adhesive composition, it has high adhesiveness to the substrate constituting the printed wiring board and has high heat resistance that can be used for lead-free solder. It has excellent flame retardancy without using halogen or antimony, and can exhibit a high degree of insulation reliability in a high temperature and high humidity environment.
- the printed wiring board of the present invention can be manufactured using any conventionally known process except that the material of each layer described above is used.
- polyester polyol (Physical property evaluation method) (1) Composition of polyester polyol Polyester polyol was dissolved in deuterated chloroform, and the molar ratio of each component was determined by 1 H-NMR analysis. However, when the polyester polyol was not dissolved in deuterated chloroform, it was dissolved in deuterated dimethyl sulfoxide and subjected to 1 H-NMR analysis.
- Phosphorus atom content (wet decomposition, molybdenum blue colorimetric method) Weigh the sample in an Erlenmeyer flask according to the phosphorus concentration in the sample (polyester polyol or polyurethane resin), add 3 mL of sulfuric acid, 0.5 mL of perchloric acid, and 3.5 mL of nitric acid, and gradually heat it for half a day with an electric heater. Disassembled. After the solution became clear, it was further heated to produce white sulfuric acid smoke and allowed to cool to room temperature.
- This decomposition solution was transferred to a 50 mL volumetric flask, 5 mL of 2% ammonium molybdate solution and 2 mL of 0.2% hydrazine sulfate solution were added, the volume was made up pure, and the contents were mixed well.
- the flask was placed in a boiling water bath for 10 minutes to develop color by heating, then cooled to room temperature and deaerated with ultrasound.
- the solution was taken in an absorption cell 10 mm, and the absorbance was measured with a spectrophotometer (wavelength 830 nm) using the blank test solution as a control.
- the phosphorus content was calculated from the calibration curve prepared previously, and the phosphorus concentration in the sample was calculated.
- a polyurethane resin composition to be described later is applied to a polyimide film having a thickness of 12.5 ⁇ m (manufactured by Kaneka Corporation, Apical (registered trademark) NPI) so that the thickness after drying is 20 ⁇ m. And dried at 130 ° C. for 3 minutes. Subsequently, it was cured by heat treatment at 170 ° C. for 1 hour to obtain a sample for flame retardancy evaluation.
- Solder heat resistance after humidification A sample for initial evaluation and a sample for evaluation over time having a 25 mm square were allowed to stand for 3 days under humidification at 40 ° C. and 85% relative humidity to sufficiently absorb moisture. Thereafter, the sample was floated in a heated solder bath for 1 minute, and the upper limit temperature at which swelling did not occur was measured at a pitch of 10 ° C. In this test, it is necessary to suppress the impact caused by the evaporation of water vapor contained in each substrate and adhesive layer, and more severe solder heat resistance than normal is required.
- Peel strength Samples for initial evaluation and time evaluation samples with a width of 10 mm were peeled off in a 90 ° direction at 25 ° C. and 25 mm atmosphere at a tensile speed of 50 mm / min using Autograph AG-Xplus manufactured by Shimadzu. The peel strength was measured. This test shows the adhesive strength at room temperature. (Determination) A: 15 N / cm or more B: 10 N / cm or more and less than 15 N / cm ⁇ : 8 N / cm or more and less than 10 N / cm ⁇ : less than 8 N / cm
- Insulation reliability Under an environment where the temperature is 85 ° C. and the relative humidity is 85%, a DC voltage of 100 V is applied to each end of the comb electrode of the sample using an insulation deterioration characteristic evaluation system SIR13 manufactured by Enomoto Kasei Co., Ltd. Sex was evaluated.
- ⁇ When the insulation resistance value is less than 1 ⁇ 10 8 ⁇ for 750 hours or more and less than 1000 hours, or when the occurrence of dendrite is confirmed.
- ⁇ When the insulation resistance value is less than 1 ⁇ 10 8 ⁇ for 500 hours or more and less than 750 hours, or when dendrite is confirmed to be generated. ⁇ : When the insulation resistance value is less than 1 ⁇ 10 8 ⁇ in less than 500 hours, or when dendrite is confirmed to be generated.
- Flame retardancy was measured in accordance with UL-94 VTM-0 flame retardancy standard. (Decision) ⁇ : Satisfies the UL94VTM-0 standard. X: Not satisfying the UL94VTM-0 standard.
- Example of Polymerization of Polyester Polyol A Containing Phosphorus Compound Residue In a reaction vessel equipped with a stirrer, a thermometer, and an outlet cooler, 171 parts of terephthalic acid, 228 parts of isophthalic acid, 9,10-dihydro-9-oxa -10 parts phosphaphenanthrene-10-oxide (HCA manufactured by Sanko Co., Ltd.), 130 parts itaconic acid, 6.6 parts trimellitic anhydride, 158 parts 2-methyl-1,3-propanediol, 1,6- 483 parts of hexanediol and 0.65 part of tributylamine were added, the temperature was gradually raised to 240 ° C.
- Polyester Polyols B to F Containing Phosphor Compound Residues Polyester polyols B to F were obtained in the same manner as in the polymerization examples of polyester polyols A containing a phosphorus compound residue and the temperature and time were appropriately selected. The composition and characteristic values of this resin are shown in Table 1. Each measurement evaluation item followed the above-mentioned method.
- Polymerization example of polyurethane resin a 100 parts of polyester polyol A containing phosphorus compound residue and 100 parts of toluene were dissolved in a reaction vessel equipped with a thermometer, a stirrer, a reflux condenser and a distillation tube, and then 67 parts of toluene was distilled off.
- the reaction system was dehydrated by azeotropic distillation with toluene / water. After cooling to 60 ° C., 1.8 parts of 2,2-dimethylolbutanoic acid (DMBA) and 33 parts of methyl ethyl ketone were added.
- DMBA 2,2-dimethylolbutanoic acid
- Polyurethane resins b to i were obtained using the raw materials shown in Table 2 in the same manner as the polymerization example of the polyurethane resin a.
- the characteristic values are shown in Table 2. Each measurement evaluation item followed the above-mentioned method.
- Example 1 100 parts of polyurethane resin (a) as the polyurethane resin (A) (mass of solid content only, the same applies hereinafter), 3.8 parts of epoxy resin (B-1) as the epoxy resin (B), 0 part of the epoxy resin (B-3). 4 parts were added, and it adjusted by adding methyl ethyl ketone / toluene by the ratio of 1: 1 so that solid content concentration might be 37%. The product was sufficiently stirred to obtain the intended polyurethane resin composition. The blending amount of the epoxy resin was determined by calculating so as to include an epoxy group 1.2 times the total acid value of the polyurethane resin a. Table 3 shows the evaluation results of the adhesion evaluation samples prepared by the above-described method. Both the initial evaluation and the time evaluation showed good results.
- Example 2 ⁇ Examples 2, 8, 9, 15 and Comparative Examples 2, 4, 8> Similarly to Example 1, resin compositions were prepared with the components and blending amounts shown in Tables 3 and 4, and the characteristics were evaluated. Further, in all Examples and Comparative Examples, the solid content concentration was appropriately selected and prepared in the range of 20 to 50% in order to adjust the resin composition to a suitable viscosity.
- Example 3 100 parts of polyurethane resin a as polyurethane resin (A) and 0.6 part of ion scavenger (C-1) as ion scavenger (C) are added, and methyl ethyl ketone / toluene is added 1: The mixture was added at a mass ratio of 1, and sufficiently stirred and dispersed. Next, 3.8 parts of epoxy resin (B-1) and 0.4 part of epoxy resin (B-3) are added as epoxy resin (B), and methyl ethyl ketone / toluene is added to 1 so that the solid content concentration becomes 28%. And added at a mass ratio of 1: 1. The product was sufficiently stirred to obtain the intended polyurethane resin composition.
- the blending amount of the epoxy resin was determined by calculating so as to include an epoxy group 1.2 times the total acid value of the polyurethane resin a.
- Table 3 shows the evaluation results of the adhesion evaluation samples prepared by the above-described method. Both the initial evaluation and the time evaluation showed good results.
- Examples 4-6, 10-12, 16, 17, Comparative Examples 1, 3, 5-7> In the same manner as in Example 3, a polyurethane resin composition was prepared with the components and blending amounts shown in Tables 3 and 4, and the characteristics were evaluated. Further, in all Examples and Comparative Examples, the solid content concentration was appropriately selected and prepared in the range of 20 to 50% in order to adjust the polyurethane resin composition to a suitable viscosity.
- Example 7 Add 100 parts of polyurethane resin a as polyurethane resin (A), 2.0 parts of ion scavenger (C-1) as ion scavenger (C), and 15.0 parts of silica (E-1) as silica (E) Then, methyl ethyl ketone / toluene was added at a mass ratio of 1: 1 so that the solid content concentration was 25%, and the mixture was sufficiently stirred and dispersed. Next, 6.5 parts of epoxy resin (B-1) is added as epoxy resin (B), and 1.0 part of silane coupling agent (D-1) is added as silane coupling agent (D).
- Example 13 and 14> In the same manner as in Example 7, a polyurethane resin composition was produced with the components and blending amounts shown in Table 3, and the characteristics were evaluated. Further, in all Examples and Comparative Examples, the solid content concentration was appropriately selected and prepared in the range of 20 to 50% in order to adjust the polyurethane resin composition to a suitable viscosity.
- Epoxy resin (B-1): YDCN-700-10 (o-cresol novolac type epoxy resin) manufactured by Nippon Steel & Sumitomo Chemical Co., Ltd., epoxy value 4850 equivalent / 10 6 g
- Epoxy resin (B-2): HP7200-H (dicyclopentanediene type epoxy resin) manufactured by Dainippon Ink & Chemicals, Epoxy value 3540 equivalent / 10 6 g
- Epoxy resin (B-3): TETRAD (registered trademark) -X (N, N, N ′, N′-tetraglycidyl-m-xylenediamine) manufactured by Mitsubishi Gas Chemical Co., Inc., epoxy value 10000 equivalent / 10 6 g
- polyurethane resin f has a low urethane group concentration and does not correspond to polyurethane resin (A), and thus is outside the scope of the present invention. It is considered that the polarity is low, the adhesive strength with the substrate and the strength of the coating film are reduced, and the peel strength is reduced.
- polyurethane resin g has a low acid value and does not correspond to polyurethane resin (A), and thus is outside the scope of the present invention. Since the acid value is low, it is considered that the cured product is insufficiently crosslinked, and the solder heat resistance after normal and humidification decreases.
- the polyurethane resin h does not correspond to the polyurethane resin (A) because it does not contain a polyester polyol containing a phosphorus compound residue as a constituent component, and thus is outside the scope of the present invention.
- the flame retardant effect of the resin becomes insufficient, and the flame retardancy is lowered.
- polyurethane resin i has a high acid value and does not correspond to polyurethane resin (A), and thus is outside the scope of the present invention. Since the acid value is high, the cross-linking density of the coating film becomes high, and the solder resistance after humidification decreases. Further, it is considered that the reactivity is high and the sheet life is lowered, and the characteristics with time are lowered.
- the polyurethane resin e has a high urethane group concentration and does not correspond to the polyurethane resin (A), and thus is outside the scope of the present invention. Since the polarity is high and the hygroscopic property is high, the insulation reliability in an environment of 85 ° C. and a relative humidity of 85% is lowered.
- the polyurethane resin composition of the present invention has high adhesion to various plastic films and metals, flame retardancy, high humidity and heat resistance that can be used for lead-free solder under high humidity, and insulation reliability under high temperature and high humidity.
- An excellent adhesive composition can be obtained.
- the adhesive layer and the laminate maintain good adhesive properties and have a good sheet life even when used after being distributed under high temperature and high humidity, a printed wiring board containing them is provided. be able to.
- the polyurethane resin composition contains a large amount of phosphorus compound by adding a small amount of an ion scavenger, the insulation reliability in a high temperature and high humidity environment is effectively improved. Can be improved. Therefore, the adhesive composition, adhesive layer, and laminate produced using the polyurethane resin composition of the present invention can be suitably used and applied particularly in the field of printed wiring boards such as FPC.
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- Engineering & Computer Science (AREA)
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Abstract
Description
(1)一般式1または一般式2で表されるリン化合物残基を含有するポリエステルポリオールを構成成分として含む
(2)酸価(単位:当量/106g)が50以上1000以下である
(3)ウレタン基濃度(単位:当量/106g)が100以上600以下である
本発明のポリウレタン樹脂組成物はポリウレタン樹脂(A)、エポキシ樹脂(B)を含有する熱硬化性樹脂組成物である。
0.7≦(BV×BW)/(AV×AW)≦3.0 (1)
を満たすことが好ましい。より好ましくは0.8以上2.5以下であり、さらに好ましくは0.9以上2.0以下である。0.7未満であると、ポリウレタン樹脂(A)とエポキシ樹脂(B)との架橋が不十分になり耐熱性が低下する傾向にあり、3.0より大きくなると、未反応のエポキシ樹脂が多量に残存し、耐熱性や耐湿熱性、接着性が低下する傾向にある。
本発明に用いるポリウレタン樹脂(A)の酸価(単位:当量/106g)は50以上100以下である。酸価が50当量/106g未満であると、硬化後の金属系基材への密着性が不充分になり、また架橋度が低く耐熱性が低下する傾向にある。酸価が1000当量/106gを超えると硬化後塗膜の弾性率が高くなり加湿後の耐ハンダ性が低下し、また接着剤層の架橋反応が常温下で進行し易く、安定したシートライフが得られないといった傾向にある。また、エステル結合やウレタン結合等の耐久性に悪影響を与えることも予想される。好ましくは酸価の下限は70当量/106g、より好ましくは酸価の下限は90当量/106g、さらに好ましくは酸価の下限は120当量/106gである。好ましい上限は400当量/106g、より好ましい上限は370当量/106g、さらに好ましい上限は3400当量/106g、特に好ましい上限は310当量/106gである。
本発明のポリウレタン樹脂組成物には、ポリウレタン樹脂(A)の他、必須成分としてエポキシ樹脂(B)を含み、ポリウレタン樹脂(A)との架橋を形成する。架橋反応によって熱硬化性樹脂組成物となり、高い耐熱性とポリイミドフィルムや銅箔との高い接着性を発現する。
本発明のポリウレタン樹脂組成物に、イオン捕捉剤(C)を含有させると、高温高湿環境下での絶縁信頼性が改善される為、好ましい。イオン捕捉剤(C)はジルコニウム系、アンチモン系、チタン系、スズ系、ビスマス系、アルミニウム系、マグネシウム系、希土類系、またはハイドロタルサイト系化合物等の無機系化合物や、トリアゾール化合物、テトラゾール化合物、ビピリジル化合物、キノール化合物、ヒドロキシアントラキノン化合物、ポリフェノール化合物、カルボキシル基含有芳香族化合物、またはカルボキシル基含有脂肪族化合物等の有機系化合物があげられる。銅イオン、塩素イオン、およびリン酸イオンのトラップ能力に優れ、且つ環境に悪影響のある重金属を含まない事から、アルミニウム系、マグネシウム系、またはハイドロタルサイト系化合物が好ましい。またこれらイオン捕捉剤(C)は一種単独で用いても二種以上を併用しても構わない。
本発明のポリウレタン樹脂組成物には、必要に応じてシランカップリング剤(D)を配合しても良い。シランカップリング剤(D)を配合することにより金属への接着性や耐熱性の特性が向上する。シランカップリング剤(D)としては特に限定されないが、不飽和基を有するもの、グリシジル基を有するもの、アミノ基を有するものなどが挙げられる。不飽和基を有するシランカップリング剤としては、特に限定されないが、例えば、ビニルトリス(β-メトキシエトキシ)シラン、ビニルトリエトキシシラン、またはビニルトリメトキシシラン等を挙げることができる。グリシジル基を有するシランカップリング剤としては、特に限定されないが、例えば、γ-グリシドキシプロピルトリメトキシシラン、β-(3,4-エポキシシクロヘキシル)エチルトリメトキシシラン、またはβ-(3,4-エポキシシクロヘキシル)エチルトリエトキシシラン等を挙げることができる。アミノ基を有するシランカップリング剤としては、特に限定されないが、例えば、N-β-(アミノエチル)-γ-アミノプロピルトリメトキシシラン、N-β-(アミノエチル)-γ-アミノプロピルメチルジメトキシシラン、またはN-フェニル-γ-アミノプロピルトリメトキシシラン等を挙げることができる。これらシランカップリング剤(D)を単独で、または2種以上を併用して使用することができる。これらのうち耐熱性の観点からγ-グリシドキシプロピルトリメトキシシランやβ-(3,4-エポキシシクロヘキシル)エチルトリメトキシシランやβ-(3,4-エポキシシクロヘキシル)エチルトリエトキシシラン等のグリシジル基を有したシランカップリング剤がさらに好ましい。
本発明のポリウレタン樹脂組成物にシリカ(E)を含有させると、接着強度の安定化、機械特性の向上、耐吸湿性の向上、耐熱性の向上の観点で好ましい。シリカ(E)は特に限定されないが、ポリウレタン樹脂組成物の透明性、機械特性、耐熱性、チキソトロピー性付与の観点から特に3次元網目構造をとる煙霧状シリカが好ましい。また、疎水性を付与する上でモノメチルトリクロロシラン、ジメチルジクロロシラン、ヘキサメチルジシラザン、オクチルシラン、またはシリコーンオイル等で処理を行った疎水性シリカの方が好ましい。これらシリカ(E)を単独で、または2種以上を併用して使用することができる。煙霧状シリカを用いる場合、一次粒子の平均径は30nm以下が好ましく、より好ましくは25nm以下である。一次粒子の平均径が30nmを超えると、粒子間や樹脂との相互作用が低下し耐熱性が低下する傾向にある。なおここで言う一次粒子の平均径とは走査型電子顕微鏡を用いて得た一次粒子像から無作為抽出した粒子100個の円相当直径の平均値である。
本発明のポリウレタン樹脂組成物には必要に応じ、臭素系、リン系、窒素系、水酸化金属化合物等の難燃剤や難燃助剤、熱安定剤、酸化防止剤、無機充填剤、滑剤、レベリング剤、顔料、染料等の添加剤を適宜配合することができる。
本発明のポリウレタン樹脂組成物は難燃剤を併用する事で難燃効果をさらに高める事ができる。難燃剤としては種々のものを用いる事ができるが、性能と環境への影響を両立する観点から、リン系難燃剤、窒素系難燃剤、または水酸化金属化合物系難燃剤が好ましい。これらの難燃剤としては、例えば、リン酸エステル、リン酸アミド、有機フォスフィンオキサイド等の有機リン系難燃剤、赤燐、ポリリン酸アンモニウム、フォスファゼン、フォスフィン酸誘導体、トリアジン、メラミンシアヌレート等の窒素系難燃剤、有機フォスフィン酸金属塩等の金属塩系難燃剤、水酸化アルミニウム、水酸化マグネシウム等の水和金属系難燃剤、その他無機系難燃剤等があげられるが、難燃性能や耐加水分解性、耐熱性といった観点から、有機フォスフィン酸金属塩、フォスファゼン、フォスフィン酸誘導体がより好ましく、一種単独で用いても二種以上を併用しても構わない。これら有機フォスフィン酸金属塩の具体例としては特に限定されないが、例えば、クラリアント(株)製エクソリット(登録商標)OPシリーズがあげられ、フォスファゼンの具体例としては、例えば、環状フェノキシホスファゼン(大塚化学(株)製、商品名:SPB-100、100L、SPE-100)、環状シアノフェノキシホスファゼン((株)伏見製薬所製、商品名:FP-300)、環状ヒドロキシフェノキシホスファゼン(大塚化学(株)製、商品名:SPH-100)等が挙げられ、フォスフィン酸誘導体としては、フェナントレン型のフォスフィン酸誘導体が好ましく、例えば、9,10-ジヒドロ-9-オキサ-10ホスファフェナントレン-10-オキシド(三光(株)製、商品名:HCA(登録商標))、10-ベンジル-10-ヒドロ-9-オキサ-10-ホスファフェナントレン-10-オキシド(三光(株)製、商品名:BCA)等があげられる。
酸化防止剤の配合は高温や高温高湿での接着性や接着強度保持力の改善に効果がある。酸化防止剤としては、例えばヒンダードフェノール系やリン系酸化防止剤を挙げることができる。具体的には、ヒンダードフェノール系として1,3,5-トリス(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)イソシアヌレート、1,1,3-トリ(4-ヒドロキシ-2-メチル-5-t-ブチルフェニル)ブタン、1,1-ビス(3-t-ブチル-6-メチル-4-ヒドロキシフェニル)ブタン、3,5-ビス(1,1-ジメチルエチル)-4-ヒドロキシ-ベンゼンプロパノイック酸、ペンタエリスリトールテトラキス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオ ネート、3-(1,1-ジメチルエチル)-4-ヒドロキシ-5-メチル-ベンゼンプロパノイック酸、3,9-ビス[1,1-ジメチル-2-[(3-t-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオニロキシ]エチル]-2,4,8,10-テトラオキサスピロ[5.5]ウンデカン、1,3,5-トリメチル-2,4,6-トリス(3’,5’-ジ-t-ブチル-4’-ヒドロキシベンジル)ベンゼン、オクタデシル-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート、2,5-ジ-t-ブチルハイドロキノン、4,4’-ブチルデンビス(3-メチル-6-t-ブチルフェノール)、1,1,3-トリス(2-メチル-4-ヒドロキシ-5-t-ブチルフェニル)ブタン、1,3,5-トリス-メチル-2,4,6-トリス(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)ベンゼン、トリス(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)イソシアヌレート等、またはそれらの誘導体が挙げられ、リン系として、3,9-ビス-(p-ノニルフェノキシ)2,4,8,10-テトラオキサ-3,9-ジフォスファスピロ[5.5]ウンデカン、3,9-ビス(オクタデシロキシ)-2,4,8,10-テトラオキサ-3,9-ジフォスファスピロ[5.5]ウンデカン、ジエチル[[3,5-ビス(1,1-ジメチルエチル)-4-ヒドロキシフェニル]メチル]ホスフォネート、トリ(モノノニルフェニル)フォスファイト、トリフェノキシフォスフィン、イソデシルフォスファイト、イソデシルフェニルフォスファイト、ジフェニル-2-エチルヘキシルフォスファイト、ジノニルフェニルビス(ノニルフェニル)エステルフォスフォラス酸、1,1,3-トリス(2-メチル-4-ジトリデシルフォスファイト-5-t-ブチルフェニル)ブタン、トリス(2,4-ジ-t-ブチルフェニル)フォスファイト、ペンタエリスリトールビス(2,4-ジ-t-ブチルフェニルフォスファイト)、2,2-メチレンビス(4,6-ジ-t-ブチルフェニル)-2-エチルヘキシルフォスファイト、ビス(2,6-ジ-t-ブチル-4-メチルフェニル)ペンタエリスリトールジフォスファイト、またはそれらの誘導体が挙げられ、これらを単独に、または複合して使用できる。添加量は5重量%以下が好ましく、5重量%超えると、接着性に悪影響を与える場合がある。
本発明の樹ポリウレタン脂組成物の難燃性の補助、接着強度の安定化、機械特性の向上、耐吸湿性の向上、耐熱性の向上等を目的として上記したシリカ以外の無機充填材を配合する事ができる。無機充填材としては特に制限は無いが、樹脂組成物にチキソトロピー性を付与できるものや熱伝導性を付与できるものが好ましいが。このような無機充填材としては、例えば、アルミナ、チタニア、酸化タンタル、ジルコニア、窒化ケイ素、チタン酸バリウム、炭酸バリウム、チタン酸鉛、チタン酸ジルコン酸鉛、チタン酸ジルコン酸ランタン鉛、酸化ガリウム、スピネル、ムライト、コーディエライト、タルク、水酸化アルミニウム、水酸化マグネシウム、チタン酸アルミニウム、イットリア含有ジルコニア、ケイ酸バリウム、窒化ホウ素、炭酸カルシウム、硫酸カルシウム、酸化亜鉛、ホウ酸亜鉛、チタン酸マグネシウム、ホウ酸マグネシウム、硫酸バリウム、有機ベントナイト、カーボンなどを使用することができ、これらは単独で用いても、二種以上併用してもかまわない。
本発明の接着剤組成物は、前記ポリウレタン樹脂組成物を含有する組成物である。また、必要に応じてイオン捕捉剤(C)、シランカップリング剤(D)およびシリカ(E)からなる群より選択される1種以上を配合したものである。さらに、その他の添加剤として、必要に応じて、臭素系、リン系、窒素系、水酸化金属化合物等の難燃剤や難燃助剤、熱安定剤、酸化防止剤、無機充填剤、滑剤、レベリング剤、顔料、染料等の添加剤を適宜配合したものである。
本発明において、接着剤層とは、本発明の接着剤組成物を基材1に塗布し、乾燥させた後の接着剤組成物の層をいう。接着剤層は接着剤組成物に含まれるポリウレタン樹脂(A)、エポキシ樹脂(B)、およびこれらに由来する反応生成物の少なくとも一部が反応し、半硬化状態(以下、Bステージ状態ともいう)であることが好ましい。半硬化状態であることにより、FPC製造時のプレス工程において、接着剤層の流動性や粘度が良好となる。これによりプレス時の流れ出しを抑制することができる。流れ出しが多いと製品の信頼性の低下や、不良率の増加につながる。接着剤組成物を基材1にコーティングする方法としては、特に限定されないが、コンマコーター、リバースロールコーター、ダイコーター等が挙げられる。また、必要に応じて、プリント配線板構成材料である圧延銅箔、またはポリイミドフィルムに直接もしくは転写法でコーティングすることもできる。乾燥後の接着剤層の厚みは、必要に応じて、適宜設定できるが、好ましくは5~200μmの範囲である。接着剤層の厚みが5μm未満では、接着強度が不十分であることがある。また、200μmを超えると乾燥が不十分で、残留溶剤が多くなり、プリント配線板製造のプレス時にフクレを生じるという問題点が挙げられる。乾燥条件は特に限定されないが、乾燥後の残留溶剤率は4%以下が好ましい。4%より大きくなると、プリント配線板プレス時に残留溶剤が発泡して、フクレを生じるという問題点が挙げられる。接着剤層は基材1から剥がして接着剤層単独であっても使用することができるし、基材1に貼付したままであっても構わない。基材1と貼付したままである場合は積層体という。
本発明において、積層体とは、基材1と接着剤層との2層積層体であっても構わないし、さらに基材2を貼り合わせた3層の積層体であっても構わない。3層の積層体にすると、基材への裏移りを起こすことなく巻き取りが可能になり操業性に優れるとともに、接着剤層が保護されることから保存性に優れ、使用も容易である。
本発明におけるプリント配線板は、前記積層体を構成要素として含むものである。プリント配線板は、特に限定されないが、例えば、積層体を用いてサブトラクティブ法、アディティブ法などの従来公知の方法により製造したものであり、いわゆるフレキシブル回路板(FPC)、フラットケーブル、テープオートメーティッドボンディング(TAB)用の回路板などを総称したものである。本発明におけるFPCは、補強材で補強したものも、補強材で補強していないものも含む。補強材で補強する場合は、補強材、接着剤層が基材1または基材2の下に設けられる。補強材としては、特に限定されないが、SUS板、アルミニウム板等の金属板、ポリイミドフィルム、ガラス繊維をエポキシ樹脂で硬化した板(ガラスエポキシ板)等が使用される。
(BV×BW)/(AV×AW)
の値を指すこととする。
(1)ポリエステルポリオールの組成
ポリエステルポリオールを重クロロホルムに溶解し、1H-NMR分析により、各成分のモル比を求めた。但し、ポリエステルポリオールが重クロロホルムに溶解しない場合には、重ジメチルスルホキシドに溶解して1H-NMR分析を行った。
試料(ポリエステルポリオールまたはポリウレタン樹脂)を、樹脂濃度が0.5%程度となるようにテトラヒドロフランに溶解または希釈し、孔径0.5μmのポリ四フッ化エチレン製メンブランフィルターで濾過したものを測定用試料とした。測定用試料について、テトラヒドロフランを移動相とし示差屈折計を検出器とするゲル浸透クロマトグラフィーにより分子量を測定した。流速は1mL/分、カラム温度は30℃とした。カラムには昭和電工製KF-802、804L、806Lを用いた。分子量標準には単分散ポリスチレンを使用した。但し、測定用試料がテトラヒドロフランに溶解しない場合は、テトラヒドロフランに変えてN,N-ジメチルホルムアミドを用いた。
示差走査熱量計を用い、測定試料(ポリエステルポリオールまたはポリウレタン樹脂)10mgをアルミパンに入れ、蓋を押さえて密封し、セイコーインスツルメンツ(株)製示差走査熱量分析計(DSC)DSC-200を用いて、20℃/minの昇温速度で測定した。ガラス転移温度以下のベースラインの延長線と遷移部における最大傾斜を示す接線との交点である補外ガラス転移開始温度を求めた。
試料(ポリエステルポリオールまたはポリウレタン樹脂)0.2gを20mlのクロロホルムに溶解し、指示薬としてフェノールフタレインを用い、0.1Nの水酸化カリウムエタノール溶液で滴定した。樹脂106gあたりの当量(eq/106g)を算出した。
JIS K 7236に準拠し、過塩素酸滴定法を用いて得られたエポキシ当量(1当量のエポキシ基を含む樹脂の質量)から樹脂106gあたりの当量(eq/106g)を算出した。
試料(ポリエステルポリオールまたはポリウレタン樹脂)中のリン濃度に合わせて試料を三角フラスコに計量し、硫酸3mL、過塩素酸0.5mL、および硝酸3.5mLを加え、電熱器で半日かけて徐々に加熱分解した。溶液が透明になった後、さらに加熱して硫酸白煙を生じさせ、室温まで放冷した。この分解液を50mLメスフラスコに移し、2%モリブデン酸アンモニウム溶液5mLおよび0.2%硫酸ヒドラジン溶液2mLを加え、純粋にてメスアップし、内容物を良く混合した。沸騰水浴中に10分間フラスコをつけて加熱発色した後、室温まで水冷し、超音波にて脱気した。溶液を吸収セル10mmに採り、分光光度計(波長830nm)にて空試験液を対照にして吸光度を測定した。先に作製しておいた検量線からリン含有量を求め、試料中のリン濃度を算出した。
(1)常態ハンダ耐熱性、加湿後ハンダ耐熱性、剥離強度評価用サンプル作製方法
後述するポリウレタン樹脂組成物を厚さ12.5μmのポリイミドフィルム(株式会社カネカ製、アピカル(登録商標)NPI)に、乾燥後の厚みが20μmとなるように塗布し、130℃で3分乾燥して、積層体Aを得た。この様にして得られた積層体Aを18μmの電解銅箔と、電解銅箔の光沢面が接着剤と接する様にして、160℃で35kgf/cm2の加圧下に30秒間プレスし、接着した。次いで170℃で1時間熱処理して硬化させて、常態ハンダ耐熱性、加湿後ハンダ耐熱性、剥離強度評価用サンプルを得た(初期評価用サンプル)。
また、同様に積層体Aを、40℃、80%加湿下にて14日間放置後、上記条件にて電解銅箔とプレス、熱処理して硬化させ、経時評価用のサンプルを得た。
(2)絶縁信頼性評価用サンプル作製方法
後述するポリウレタン樹脂組成物を厚さ12.5μmのポリイミドフィルム(株式会社カネカ製、アピカル(登録商標)NPI)に、乾燥後の厚みが20μmとなるように塗布し、130℃で3分乾燥して、積層体Aを得た。一対の櫛型電極からなる200μmピッチ(ライン幅/スペース幅=100μm/100μm)の櫛形回路を形成した片面銅張積層板の櫛形回路面と前記積層体Aの接着剤層面(ポリウレタン樹脂組成物塗布面)を対向させて、160℃で35kgf/cm2の加圧下に30秒間プレスし、接着した。次いで170℃で1時間熱処理して硬化させて、絶縁信頼性評価用サンプルを得た。
(3)難燃性評価用サンプル作製方法
後述するポリウレタン樹脂組成物を厚さ12.5μmのポリイミドフィルム(株式会社カネカ製、アピカル(登録商標)NPI)に、乾燥後の厚みが20μmとなるように塗布し、130℃で3分乾燥した。次いで170℃で1時間熱処理して硬化させ、難燃性評価用サンプルを得た。
(判定)◎:耐熱温度280℃以上
○:耐熱温度260℃以上280℃未満
△:耐熱温度240℃以上260℃未満
×:耐熱温度240℃未満
(判定)◎:耐熱温度270℃以上
○:耐熱温度250℃以上270℃未満
△:耐熱温度230℃以上250℃未満
×:耐熱温度230℃未満
(判定)◎:15N/cm以上
○:10N/cm以上15N/cm未満
△:8N/cm以上10N/cm未満
×:8N/cm未満
(判定)◎:1000時間経過後も絶縁抵抗値が1×108Ωを上回り、かつデンドライトを生じないもの。
○:750時間以上1000時間未満で絶縁抵抗値が1×108Ωを下回った場合、若しくはデンドライトの発生が確認された場合。
△:500時間以上750時間未満で絶縁抵抗値が1×108Ωを下回った場合、若しくはデンドライトの発生が確認された場合。
×:500時間未満で絶縁抵抗値が1×108Ωを下回った場合、若しくはデンドライトの発生が確認された場合。
(判定)○:UL94VTM-0規格を満足するもの。
×:UL94VTM-0規格を満足しないもの。
撹拌器、温度計、流出用冷却器を装備した反応缶内に、テレフタル酸171部、イソフタル酸228部、9,10-ジヒドロ-9-オキサ-10ホスファフェナントレン-10-オキシド(三光株式会社製HCA)193部、イタコン酸130部、無水トリメリット酸6.6部、2-メチル-1,3-プロパンジオール158部、1,6-ヘキサンジオール483部、トリブチルアミン0.65部を仕込み、3~5時間かけて240℃まで徐々に昇温し、留出する水を系外に除きつつエステル化反応、マイケル付加反応を行った。エステル化反応終了後、170℃まで降温しテトラブチルチタネート1.17部を仕込み、30分かけて10mmHgまで減圧初期重合を行うと共に温度を250℃まで昇温し、更に1mmHg以下で40分後期重合を行った。その後、窒素にて常圧に戻し、無水トリメリット酸6.6部を投入し、220℃で30分間反応させることによってリン化合物残基を含有するポリエステルポリオールAを得た。この様にして得られたポリエステルポリオールAの組成、特性値を表1に示した。各測定評価項目は前述の方法に従った。なお、HCAとイタコン酸とのマイケル付加反応で得られるリン化合物は式3の構造を有する。
リン化合物残基を含有するポリエステルポリオールAの重合例と同様にして、また温度、時間は適宜選択しポリエステルポリオールB~Fを得た。この樹脂の組成、特性値を表1に示した。各測定評価項目は前述の方法に従った。
温度計、攪拌機、還流式冷却管および蒸留管を具備した反応容器にリン化合物残基を含有するポリエステルポリオールA100部、トルエン100部を仕込み溶解後、トルエン67部を留去させながらトルエン/水の共沸により反応系を脱水した。60℃まで冷却後、2,2-ジメチロールブタン酸(DMBA)を1.8部、メチルエチルケトン33部を加えた。DMBAが溶解後、4,4’-ジフェニルメタンジイソシアネート(MDI)を4.2部、さらに反応触媒としてジアザビシクロウンデセン(DBU)を0.004部加え、80℃で8時間反応させてから、メチルエチルケトン92部を投入して固形分濃度を40重量%に調整し、ポリウレタン樹脂a溶液を得た。この様にして得られたポリウレタン樹脂aの特性値を表1に示した。各測定評価項目は前述の方法に従った。また、ガラス転移温度は120℃で1時間乾燥することにより溶剤を除いたフィルムを用いて、前述した各測定評価項目に従い測定した。また、ウレタン基濃度(単位:当量/106g)は仕込量より算出した。
ポリウレタン樹脂aの重合例と同様にして、表2に示す原料を用いて、ポリウレタン樹脂b~iを得た。特性値を表2に示した。各測定評価項目は前述の方法に従った。
ポリウレタン樹脂(A)としてポリウレタン樹脂aを100部(固形分のみの質量、以下同様)、エポキシ樹脂(B)としてエポキシ樹脂(B-1)3.8部、エポキシ樹脂(B-3)0.4部を加え、固形分濃度が37%となるようにメチルエチルケトン/トルエンを1:1の比で加えて調整した。十分に撹拌し目的とするポリウレタン樹脂組成物を得た。エポキシ樹脂の配合量は、ポリウレタン樹脂aの酸価の総量の1.2倍のエポキシ基を含むように算出して決定した。接着評価試料を上述の方法で作製し、評価した結果を表3に示す。初期評価、経時評価ともに良好な結果を示している。
実施例1と同様に、表3、4に示される成分、配合量で樹脂組成物を作製し特性を評価した。また、全ての実施例、比較例において、樹脂組成物を好適に塗布可能な粘度に調整する為、固形分濃度は20~50%の範囲で適宜選択し調製した。
ポリウレタン樹脂(A)としてポリウレタン樹脂aを100部、イオン捕捉剤(C)としてイオン捕捉剤(C-1)0.6部を加え、固形分濃度30%となるようにメチルエチルケトン/トルエンを1:1の質量比で加え、十分に撹拌、分散した。次に、エポキシ樹脂(B)としてエポキシ樹脂(B-1)3.8部、エポキシ樹脂(B-3)0.4部を加え、固形分濃度が28%となるようにメチルエチルケトン/トルエンを1:1の質量比で加えて調製した。十分に撹拌し目的とするポリウレタン樹脂組成物を得た。エポキシ樹脂の配合量は、ポリウレタン樹脂aの酸価の総量の1.2倍のエポキシ基を含むように算出して決定した。接着評価試料を上述の方法で作製し、評価した結果を表3に示す。初期評価、経時評価ともに良好な結果を示している。
実施例3と同様に、表3、4に示される成分、配合量でポリウレタン樹脂組成物を作製し特性を評価した。また、全ての実施例、比較例において、ポリウレタン樹脂組成物を好適に塗布可能な粘度に調整する為、固形分濃度は20~50%の範囲で適宜選択し調製した。
ポリウレタン樹脂(A)としてポリウレタン樹脂aを100部、イオン捕捉剤(C)としてイオン捕捉剤(C-1)2.0部、シリカ(E)としてシリカ(E-1)15.0部を加え、固形分濃度25%となるようにメチルエチルケトン/トルエンを1:1の質量比で加え、十分に撹拌、分散した。次に、エポキシ樹脂(B)としてエポキシ樹脂(B-1)6.5部、シランカップリング剤(D)としてシランカップリング剤(D-1)1.0部を加え、固形分濃度が25%となるようにメチルエチルケトン/トルエンを1:1の質量比で加えて調整した。十分に撹拌し目的とするポリウレタン樹脂組成物を得た。エポキシ樹脂の配合量は、ポリウレタン樹脂aの酸価の総量の1.7倍のエポキシ基を含むように算出して決定した。接着評価試料を上述の方法で作製し、評価した結果を表3に示す。初期評価、経時評価ともに良好な結果を示している。
実施例7と同様に、表3に示される成分、配合量でポリウレタン樹脂組成物を作製し特性を評価した。また、全ての実施例、比較例において、ポリウレタン樹脂組成物を好適に塗布可能な粘度に調整する為、固形分濃度は20~50%の範囲で適宜選択し調製した。
エポキシ樹脂(B-1):新日鉄住友化学(株)製 YDCN-700-10(o-クレゾールノボラック型エポキシ樹脂)、エポキシ価=4850当量/106g
エポキシ樹脂(B-2):大日本インキ工業(株)製 HP7200-H(ジシクロペンタンジエン型エポキシ樹脂)、エポキシ価=3540当量/106g
エポキシ樹脂(B-3):三菱瓦斯化学(株)製 TETRAD(登録商標)-X(N,N,N’,N’-テトラグリジジル-m-キシレンジアミン)、エポキシ価=10000当量/106g
イオン捕捉剤(C-1):IXE(登録商標)-700F(東亞合成(株)製 無機イオン交換体)
イオン捕捉剤(C-2):IXE(登録商標)-770D(東亞合成(株)製 無機イオン交換体)
シランカップリング剤(D-1):KBM-403(信越化学工業(株)製 3-グリシドキシプロピルトリメトキシシラン)
シリカ(E-1):R972(日本アエロジル(株)製 疎水性煙霧状シリカ)
H-43M:昭和電工(株)製 水酸化アルミニウム ハイジライト
Claims (8)
- 下記(1)~(3)を満足するポリウレタン樹脂(A)およびエポキシ樹脂(B)を含有するポリウレタン樹脂組成物。
(1)一般式1または一般式2で表されるリン化合物残基を含有するポリエステルポリオールを構成成分として含む
(2)酸価(単位:当量/106g)が50以上1000以下である
(3)ウレタン基濃度(単位:当量/106g)が100以上600以下である
- ポリウレタン樹脂(A)の酸価をAV(当量/106g)、配合量をAW(質量部)、エポキシ樹脂(B)のエポキシ価BV(当量/106g)、配合量をBW(質量部)としたときに、0.7≦(BV×BW)/(AV×AW)≦3.0を満たす請求項1に記載のポリウレタン樹脂組成物。
- さらに、イオン捕捉剤(C)を含む請求項1または2に記載のポリウレタン樹脂組成物。
- さらに、シランカップリング剤(D)および/またはシリカ(E)を含む請求項1~3のいずれかに記載のポリウレタン樹脂組成物。
- エポキシ樹脂(B)がジシクロペンタジエン骨格を有するエポキシ樹脂である請求項1~4のいずれかに記載のポリウレタン樹脂組成物。
- 請求項1~5いずれかに記載のポリウレタン樹脂組成物を含有する接着剤組成物。
- 請求項6に記載の接着剤組成物を含む接着剤層と、フィルムまたは金属との積層体。
- 請求項7に記載の積層体を含むプリント配線板。
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JP2015500700A JP5743042B1 (ja) | 2013-09-26 | 2014-09-19 | ポリウレタン樹脂組成物およびこれを用いた接着剤組成物、積層体、プリント配線板 |
KR1020157036033A KR102237222B1 (ko) | 2013-09-26 | 2014-09-19 | 폴리우레탄 수지 조성물 및 이것을 이용한 접착제 조성물, 적층체, 프린트 배선판 |
CN201480047526.3A CN105492534B (zh) | 2013-09-26 | 2014-09-19 | 聚氨酯树脂组合物及使用其的粘接剂组合物、层叠体、印刷线路板 |
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JP2018078337A (ja) * | 2018-01-18 | 2018-05-17 | 藤森工業株式会社 | Fpc用導電性接着シート及びそれを用いたfpc |
JP2020063353A (ja) * | 2018-10-17 | 2020-04-23 | 東洋紡株式会社 | 接着剤組成物、それを用いた接着剤シート、および積層体並びにそれらを用いたプリント基板 |
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WO2021106960A1 (ja) * | 2019-11-27 | 2021-06-03 | 東亞合成株式会社 | 樹脂組成物、樹脂組成物層付き積層体、積層体、フレキシブル銅張積層板、フレキシブルフラットケーブル、及び、電磁波シールドフィルム |
JPWO2021106960A1 (ja) * | 2019-11-27 | 2021-06-03 |
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TWI614306B (zh) | 2018-02-11 |
JP5743042B1 (ja) | 2015-07-01 |
KR20160061916A (ko) | 2016-06-01 |
CN105492534B (zh) | 2018-09-21 |
JPWO2015046032A1 (ja) | 2017-03-09 |
KR102237222B1 (ko) | 2021-04-08 |
CN105492534A (zh) | 2016-04-13 |
TW201522497A (zh) | 2015-06-16 |
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