WO2009110424A1 - 変性エポキシ樹脂、エポキシ樹脂組成物及び硬化物 - Google Patents
変性エポキシ樹脂、エポキシ樹脂組成物及び硬化物 Download PDFInfo
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- WO2009110424A1 WO2009110424A1 PCT/JP2009/053849 JP2009053849W WO2009110424A1 WO 2009110424 A1 WO2009110424 A1 WO 2009110424A1 JP 2009053849 W JP2009053849 W JP 2009053849W WO 2009110424 A1 WO2009110424 A1 WO 2009110424A1
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- epoxy resin
- resin composition
- curing agent
- inorganic filler
- hydroquinone
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/621—Phenols
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
- H01L23/295—Organic, e.g. plastic containing a filler
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/095—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00 with a principal constituent of the material being a combination of two or more materials provided in the groups H01L2924/013 - H01L2924/0715
- H01L2924/097—Glass-ceramics, e.g. devitrified glass
- H01L2924/09701—Low temperature co-fired ceramic [LTCC]
Definitions
- the present invention has excellent handleability as a solid at room temperature, which is useful for insulating materials for electrical and electronic parts such as highly reliable semiconductor sealing, laminates, and heat dissipation boards, and low viscosity during molding.
- the present invention relates to a crystalline modified epoxy resin, an epoxy resin composition using the same, and a cured product obtained therefrom.
- a sealing material composed of an epoxy resin and a resin composition containing a phenol resin as a main component of a resin component as a curing agent is generally used. .
- the transition from the conventional pin insertion method to the surface mounting method is progressing as a method for mounting electronic components on a printed circuit board.
- the entire package is heated to the solder temperature, so package cracking due to thermal shock has become a major problem.
- a high filling rate of inorganic fillers is an effective method for preventing package cracking. is there.
- an epoxy resin composition used as a sealing material for a power device or the like is required to be filled with an inorganic filler at a high density in order to cope with a large amount of heat released from the element.
- an epoxy resin excellent in low viscosity is desired.
- low-viscosity epoxy resins bisphenol A type epoxy resins, bisphenol F type epoxy resins, and the like are generally widely used.
- those having low viscosity are liquid at room temperature and are difficult to handle. Furthermore, these epoxy resins are not sufficient in terms of heat resistance, mechanical strength, and toughness.
- Patent Document 1 proposes an epoxy resin composition for semiconductor encapsulation based on a biphenyl-based epoxy resin as an improved handling workability, heat resistance, toughness, etc., but has low water absorption and low viscosity. In terms of curability, it is not sufficient.
- Patent Document 2 proposes a bisphenol F type solid epoxy resin as a main agent. Bisphenol F-type epoxy resin is characterized by excellent low viscosity, but has problems in heat resistance and curability.
- Patent Document 3 discloses an epoxy resin composition using an epoxy resin having a hydroquinone structure, which has an alkyl substituent having 3 to 6 carbon atoms, and has a steric structure of the substituent. There are problems such as a decrease in thermal conductivity due to a decrease in reactivity due to an obstacle or a packing of molecules after curing.
- Patent Document 7 discloses an epoxy resin composition obtained by blending an epoxy resin having a hydroquinone structure and an epoxy resin having a biphenyl structure, but it is not intended to exhibit high thermal conductivity. In Patent Document 7, a tetramethyl-substituted epoxy resin is used as an epoxy resin having a biphenyl structure. However, according to the follow-up experiment by the present inventors, those having an alkyl substituent have a problem of lowering the thermal conductivity. It was found that there is.
- Patent Documents 4 and 5 attempts have been made to use crystalline silica, silicon nitride, aluminum nitride, and spherical alumina powder as a technique for improving the thermal conductivity.
- Patent Documents 4 and 5 When it raises, the fluidity falls with the viscosity increase at the time of shaping
- Patent Document 6 and Patent Document 8 propose a resin composition using a liquid crystalline resin having a rigid mesogenic group.
- the epoxy resin having these mesogenic groups is a substantially single epoxy compound having a rigid structure such as a biphenyl structure and an azomethine structure and having a high crystallinity and a high melting point molecular weight distribution.
- the thermal conductivity of the inorganic filler is overwhelmingly larger than that of the matrix resin, and even if the thermal conductivity of the matrix resin itself is increased, There is a reality that it does not greatly contribute to the improvement of thermal conductivity, and a sufficient effect of improving thermal conductivity has not been obtained. And it is the improvement of the thermal conductivity of the resin that has been studied for the improvement of the thermal conductivity. In the case of a mixed system with a filler, if the filler is sufficiently present, the thermal conductivity of the filler is overwhelmingly high. Therefore, it has been generally recognized that even if the thermal conductivity of the resin is improved somewhat, the effect is small.
- Patent Document 9 discloses that a load applied to a connection electrode portion of a semiconductor device on which a semiconductor element is mounted by a flip chip method or the like is efficiently dispersed and reduced in a sealing resin layer, and severe environmental conditions such as a temperature cycle are reduced.
- the epoxy resin composition for ensuring the electrical conductivity of the semiconductor device is disclosed below, the epoxy resin includes a hydroquinone type epoxy resin having a tertiary butyl group and a biphenyl type epoxy resin having a methyl group. Only disclosed.
- Patent Document 10 discloses a high thermal conductivity epoxy resin composition containing spherical cristobalite that gives a cured product having good fluidity, less mold wear, and high thermal conductivity.
- Patent Document 11 discloses an epoxy resin composition that is highly filled with an inorganic filler and can obtain a molded article having excellent thermal conductivity. The means for achieving this is an improvement of the filler. There is no attempt to improve the resin.
- the object of the present invention is to solve the above-mentioned problems and to be excellent in handling property as a solid at room temperature and modified epoxy resin excellent in low viscosity at molding temperature, and to be combined with an inorganic filler using the same. It is to provide an epoxy resin composition which gives a cured product having a high thermal conductivity, a low thermal expansion property and excellent heat resistance and moisture resistance, and the cured product.
- the present invention is obtained by reacting a mixture of 0.1 to 10 parts by weight of 4,4′-dihydroxybiphenyl with 1 part by weight of hydroquinone and epichlorohydrin. It is a modified epoxy resin having
- the present invention uses (A) an epoxy resin, (B) a curing agent, and (C) 50 wt% or more of the above-mentioned modified epoxy resin as an epoxy resin in an epoxy resin composition containing as a main component. It is an epoxy resin composition characterized by these.
- the preferable aspect of the said epoxy resin composition is shown next.
- the inorganic filler content is 80 to 96 wt%.
- the curing agent is a phenolic curing agent.
- the above bifunctional phenol compound is hydroquinone, 4,4′-dihydroxybiphenyl, 4,4′-dihydroxydiphenyl ether, 1,4-bis (4-hydroxyphenoxy) benzene, 4,4′-dihydroxydiphenylmethane, 4 , 4'-dihydroxydiphenyl sulfide, 1,5-naphthalenediol, 2,7-naphthalenediol, and 2,6-naphthalenediol.
- 5) Use spherical alumina as inorganic filler at 50wt% or more of inorganic filler.
- the present invention is the above epoxy resin composition, which is an epoxy resin composition for semiconductor encapsulation.
- the present invention is a cured product obtained by curing the above epoxy resin composition and having a thermal conductivity of 4 W / m ⁇ K or more.
- the cured product has a melting point peak in the range of 120 ° C. to 280 ° C. in the scanning differential thermal analysis, or an endothermic amount in terms of the resin component in the scanning differential thermal analysis of the cured product of 10 J / g or more. There should be.
- the modified epoxy resin of the present invention can be produced by reacting a mixture of hydroquinone and 4,4'-dihydroxybiphenyl with epichlorohydrin. This reaction can be performed in the same manner as a normal epoxidation reaction.
- the modified epoxy resin of the present invention contains an epoxidized product of hydroquinone and 4,4′-dihydroxybiphenyl in addition to an epoxidized product of hydroquinone and 4,4′-dihydroxybiphenyl. It is a mixture.
- a mixture of hydroquinone and 4,4′-dihydroxybiphenyl is dissolved in an excess amount of epichlorohydrin at a molar ratio to these phenolic hydroxyl groups, and then alkali metal hydroxides such as sodium hydroxide and potassium hydroxide are dissolved.
- alkali metal hydroxides such as sodium hydroxide and potassium hydroxide
- a method of reacting in the range of 50 to 150 ° C., preferably 60 to 100 ° C. for 1 to 10 hours can be mentioned.
- the amount of alkali metal hydroxide used is 0.8 to 1.2 mol, preferably 0.9 to 1. mol, based on 1 mol of hydroxyl group in hydroquinone and 4,4′-dihydroxybiphenyl.
- the range is 0 mol.
- Epichlorohydrin is used in an excess amount with respect to the hydroxyl group in hydroquinone and 4,4′-dihydroxybiphenyl, and usually 1.5 to 15 to 1 mol of hydroxyl group in hydroquinone and 4,4′-dihydroxybiphenyl. Is a mole. After completion of the reaction, excess epichlorohydrin is distilled off, the residue is dissolved in a solvent such as toluene, methyl isobutyl ketone, filtered, washed with water to remove inorganic salts, and then the target epoxy is removed by distilling off the solvent. A resin can be obtained.
- a solvent such as toluene, methyl isobutyl ketone
- the modified epoxy resin of the present invention a mixture obtained by further mixing hydroquinone, which is an essential component as a raw material, with another phenolic compound other than 4,4'-dihydroxybiphenyl can be used.
- the total amount of hydroquinone and 4,4′-dihydroxybiphenyl is preferably 50% by weight or more, preferably 70% by weight or more, more preferably 90% by weight or more of the total phenolic compound.
- the epoxy equivalent of the modified epoxy resin of the present invention is usually in the range of 110 to 300, but from the viewpoint of increasing the filling rate and fluidity of the inorganic filler, those having low viscosity are preferred, and the epoxy equivalent is 110 to 160. A range is preferred.
- the modified epoxy resin of the present invention has crystallinity at room temperature.
- the expression of crystallinity can be confirmed as an endothermic peak accompanying the melting of the crystal by differential scanning calorimetry.
- the endothermic peak in this case is generally observed as a plurality of peaks instead of one because the modified epoxy resin of the present invention is a mixture.
- the melting point observed by differential scanning calorimetry is the endothermic peak derived from the modified epoxy resin derived from hydroquinone and 4,4′-dihydroxybiphenyl, and the endothermic peak at the lowest temperature is 50 ° C. or higher, preferably 70
- the endothermic peak at the highest temperature is 150 ° C. or lower, preferably 130 ° C. or lower.
- the melt viscosity at 150 ° C. the better, and it is usually 0.1 Pa ⁇ s or less, preferably 0.01 Pa ⁇ s or less, more preferably 0.005 Pa ⁇ s or less.
- the purity of the modified epoxy resin of the present invention is better from the viewpoint of improving the reliability of the applied electronic component.
- it does not specifically limit, Preferably it is 1000 ppm or less, More preferably, it is 500 ppm or less.
- the hydrolyzable chlorine as used in the field of this invention means the value measured by the following method. Specifically, 0.5 g of a sample was dissolved in 30 ml of dioxane, 10 ml of 1N KOH was added, boiled and refluxed for 30 minutes, cooled to room temperature, 100 ml of 80% acetone water was further added, and a potential difference was added with 0.002 N-AgNO 3 aqueous solution. This is a value obtained by titration.
- the epoxy resin composition of the present invention comprises (A) an epoxy resin, (B) a curing agent, and (C) an inorganic filler as main components, and contains the above modified epoxy resin as an epoxy resin in an amount of 50 wt% or more of the epoxy resin component. . That is, 50 wt% or more of the total epoxy resin is the modified epoxy resin.
- 70 wt% or more, more preferably 90 wt% or more of the total epoxy resin is the modified epoxy resin.
- the epoxy resin composition of the present invention may be used in combination with other ordinary epoxy resins having two or more epoxy groups in the molecule.
- examples include bisphenol A, bisphenol F, 3,3 ′, 5,5′-tetramethyl-4,4′-dihydroxydiphenylmethane, 4,4′-dihydroxydiphenylsulfone, 4,4′-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl ketone, fluorene bisphenol, 4,4'-biphenol, 3,3 ', 5,5'-tetramethyl-4,4'-dihydroxybiphenyl, 2,2'-biphenol, resorcin, catechol , T-butylcatechol, t-butylhydroquinone, 1,2-dihydroxynaphthalene, 1,3-dihydroxynaphthalene, 1,4-dihydroxynaphthalene, 1,5-dihydroxy
- any one generally known as an epoxy resin curing agent can be used, but a preferred curing agent is a phenolic curing agent.
- the phenolic curing agent includes a phenolic compound, and the phenolic compound includes a phenolic resin as well as a phenolic compound as a single compound.
- phenolic curing agents include bisphenol A, bisphenol F, 4,4'-dihydroxydiphenylmethane, 4,4'-dihydroxydiphenyl ether, 1,4-bis (4-hydroxyphenoxy) benzene, 1,3-bis (4-hydroxyphenoxy) benzene, 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl ketone, 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxybiphenyl, 2,2'-dihydroxybiphenyl 10- (2,5-dihydroxyphenyl) -10H-9-oxa-10-phosphaphenanthrene-10-oxide, phenol novolak, bisphenol A novolak, o-cresol novolak, m-cresol novolak, p-chloro Zole novolak, xylenol novolak, poly-p-hydroxystyrene, hydroquinone,
- a curing agent may be used by mixing two or more kinds of curing agents.
- a preferable curing agent contains a bifunctional phenol compound in the curing agent in an amount of 50 wt% or more, preferably 70 wt% or more.
- the bifunctional phenol compound in this case include 4,4′-dihydroxybiphenyl, 4,4′-dihydroxydiphenyl ether, 1,4-bis (4-hydroxyphenoxy) benzene, 4,4′-dihydroxydiphenylmethane, Preference is given to phenolic compounds selected from 4'-dihydroxybenzophenone, 4,4'-dihydroxydiphenyl sulfide, 1,5-naphthalenediol, 2,7-naphthalenediol, 2,6-naphthalenediol, hydroquinone and resorcin. Among these, 4,4'-dihydroxybiphenyl, 4,4'-dihydroxydiphenyl ether, or 4,4'-dihydroxydiphen
- a curing agent generally known as a curing agent can be used in addition to the above-mentioned phenolic curing agent.
- examples include amine curing agents, acid anhydride curing agents, phenolic curing agents, polymercaptan curing agents, polyaminoamide curing agents, isocyanate curing agents, block isocyanate curing agents, and the like. What is necessary is just to set the compounding quantity of these hardening
- amine curing agent examples include aliphatic amines, polyether polyamines, alicyclic amines, aromatic amines and the like.
- Aliphatic amines include ethylenediamine, 1,3-diaminopropane, 1,4-diaminopropane, hexamethylenediamine, 2,5-dimethylhexamethylenediamine, trimethylhexamethylenediamine, diethylenetriamine, iminobispropylamine, bis ( Hexamethylene) triamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, N-hydroxyethylethylenediamine, tetra (hydroxyethyl) ethylenediamine and the like.
- polyether polyamines examples include triethylene glycol diamine, tetraethylene glycol diamine, diethylene glycol bis (propylamine), polyoxypropylene diamine, and polyoxypropylene triamines.
- Cycloaliphatic amines include isophorone diamine, metacene diamine, N-aminoethylpiperazine, bis (4-amino-3-methyldicyclohexyl) methane, bis (aminomethyl) cyclohexane, 3,9-bis (3-amino).
- Aromatic amines include tetrachloro-p-xylenediamine, m-xylenediamine, p-xylenediamine, m-phenylenediamine, o-phenylenediamine, p-phenylenediamine, 2,4-diaminoanisole, 2, 4-toluenediamine, 2,4-diaminodiphenylmethane, 4,4'-diaminodiphenylmethane, 4,4'-diamino-1,2-diphenylethane, 2,4-diaminodiphenylsulfone, 4,4'-diaminodiphenylsulfone , M-aminophenol, m-aminobenzylamine, benzyldimethylamine, 2-dimethylaminomethyl) phenol, triethanolamine, methylbenzylamine, ⁇ - (m-aminophenyl) ethylamine, ⁇ -
- acid anhydride curing agents include dodecenyl succinic anhydride, polyadipic acid anhydride, polyazeline acid anhydride, polysebacic acid anhydride, poly (ethyloctadecanedioic acid) anhydride, poly (phenylhexadecanedioic acid) Anhydride, Methyltetrahydrophthalic anhydride, Methylhexahydrophthalic anhydride, Hexahydrophthalic anhydride, Methylhymic anhydride, Tetrahydrophthalic anhydride, Trialkyltetrahydrophthalic anhydride, Methylcyclohexene dicarboxylic anhydride, Methylcyclohexene tetracarboxylic Acid anhydride, phthalic anhydride, trimellitic anhydride, pyromellitic anhydride, benzophenone tetracarboxylic anhydride, ethylene glycol
- the blending ratio of the epoxy resin and the curing agent is preferably in the range of 0.8 to 1.5 in terms of equivalent ratio of the epoxy group and the functional group in the curing agent. Outside this range, unreacted epoxy groups or functional groups in the curing agent remain even after curing, which is not preferable because the reliability with respect to the sealing function is lowered.
- the amount of the inorganic filler added to the epoxy resin composition of the present invention is 80 to 96 wt%, preferably 84 to 96 wt%, based on the epoxy resin composition. If it is less than this, the effects aimed by the present invention such as high thermal conductivity, low thermal expansion and high heat resistance will not be sufficiently exhibited. These effects are better as the added amount of the inorganic filler is larger. However, the effect is not improved according to the volume fraction, but dramatically improved from a specific added amount. These physical properties are due to the effect of controlling the higher order structure in the polymer state, and since this higher order structure is achieved mainly on the surface of the inorganic filler, a specific amount of inorganic filler is required. It is thought to be. On the other hand, when the added amount of the inorganic filler is larger than this, the viscosity becomes high and the moldability deteriorates, which is not preferable.
- the inorganic filler is preferably spherical and is not particularly limited as long as it has a spherical shape including those having a cross section on an ellipse, but it is as close to a true sphere as possible from the viewpoint of improving fluidity. It is particularly preferred. Thereby, it is easy to take a close-packed structure such as a face-centered cubic structure or a hexagonal close-packed structure, and a sufficient filling amount can be obtained. In the case of a non-spherical shape, when the filling amount is increased, friction between the fillers is increased, and before reaching the above upper limit, the fluidity is extremely lowered to increase the viscosity and the moldability is deteriorated.
- an inorganic filler having a thermal conductivity of 5 W / m ⁇ K or more it is preferable to use 50 wt% or more of an inorganic filler having a thermal conductivity of 5 W / m ⁇ K or more, and alumina, aluminum nitride, crystalline silica, etc. are preferably used.
- alumina, aluminum nitride, crystalline silica, etc. are particularly preferable.
- an amorphous inorganic filler such as fused silica or crystalline silica may be used in combination, if necessary, regardless of the shape.
- the average particle diameter of the inorganic filler is preferably 30 ⁇ m or less. If the average particle size is larger than this, the fluidity of the epoxy resin composition is impaired, and the strength is also lowered, which is not preferable.
- a well-known hardening accelerator can be mix
- examples include amines, imidazoles, organic phosphines, Lewis acids, etc., specifically 1,8-diazabicyclo (5,4,0) undecene-7, triethylenediamine, benzyldimethylamine, Tertiary amines such as ethanolamine, dimethylaminoethanol, tris (dimethylaminomethyl) phenol, imidazoles such as 2-methylimidazole, 2-phenylimidazole, 2-phenyl-4-methylimidazole, 2-heptadecylimidazole, Organic phosphines such as tributylphosphine, methyldiphenylphosphine, triphenylphosphine, diphenylphosphine, phenylphosphine, tetraphenylphosphonium / tetraphenylborate, tetraphenylphosphon
- the addition amount of the curing accelerator is preferably 0.1 to 10.0 wt% with respect to the total of the epoxy resin (including a halogen-containing epoxy resin as a flame retardant) and the curing agent. If it is less than 0.1 wt%, the gelation time will be delayed, resulting in a decrease in workability due to a decrease in rigidity at the time of curing. Conversely, if it exceeds 10.0 wt%, curing proceeds during the molding and unfilling is likely to occur. Become.
- a wax can be used as a release agent generally used for epoxy resin compositions.
- the wax for example, stearic acid, montanic acid, montanic acid ester, phosphoric acid ester and the like can be used.
- a coupling agent generally used for an epoxy resin composition can be used in order to improve the adhesion between the inorganic filler and the resin component.
- the coupling agent for example, epoxy silane can be used.
- the addition amount of the coupling agent is preferably 0.1 to 2.0 wt% with respect to the epoxy resin composition. If it is less than 0.1 wt%, the resin and the base material will not be well-matched, and the moldability will be poor. Conversely, if it exceeds 2.0 wt%, the molded product will become dirty with continuous moldability.
- thermoplastic oligomers can be added to the epoxy resin composition of the present invention from the viewpoint of improving fluidity during molding and improving adhesion to a substrate such as a lead frame.
- Thermoplastic oligomers include C5 and C9 petroleum resins, styrene resins, indene resins, indene / styrene copolymer resins, indene / styrene / phenol copolymer resins, indene / coumarone copolymer resins, indene / benzothiophene. Examples thereof include copolymer resins.
- the addition amount is usually in the range of 2 to 30 parts by weight with respect to 100 parts by weight of the epoxy resin.
- epoxy resin composition of the present invention can be used by appropriately blending those generally usable for epoxy resin compositions.
- phosphorus-based flame retardants flame retardants such as bromine compounds and antimony trioxide
- colorants such as carbon black and organic dyes can be used.
- the epoxy resin composition of the present invention contains an epoxy resin, a curing agent and an inorganic filler as main components.
- the resin component excluding the filler the blending ratio of the epoxy resin and the curing agent is 50 wt% or more, preferably 70 wt% or more, more preferably 80 wt% or more.
- the resin component except a filler means all the components used as components other than a filler after hardening. Or all the components other than the filler in hardened
- the epoxy resin composition of the present invention is prepared by uniformly mixing an epoxy resin, a curing agent, an inorganic filler, and other components other than the coupling agent with a mixer, and then adding a coupling agent, a heating roll, a kneader, etc. Kneaded and manufactured.
- a coupling agent a heating roll, a kneader, etc. Kneaded and manufactured.
- the melt-kneaded material can be pulverized to be powdered or tableted.
- the epoxy resin composition of the present invention is particularly suitable for sealing in semiconductor devices.
- the cured product of the present invention can be obtained by thermally curing the above epoxy resin composition.
- methods such as transfer molding, press molding, cast molding, injection molding, and extrusion molding are applied, but from the viewpoint of mass productivity. Transfer molding is preferred.
- the cured product of the present invention preferably has crystallinity from the viewpoint of high thermal conductivity.
- the expression of crystallinity of the cured product can be confirmed by observing an endothermic peak accompanying melting of the crystal as a melting point by scanning differential thermal analysis.
- a preferred melting point is in the range of 120 ° C. to 280 ° C., more preferably in the range of 150 ° C. to 250 ° C.
- cured material is 4 W / m * K or more, Most preferably, it is 6 W / m * K or more.
- a preferable endothermic amount is 10 J / g or more per unit weight of the resin component excluding the filler. More preferably, it is 15 J / g or more, and particularly preferably 30 J / g or more. If it is smaller than this, the effect of improving the thermal conductivity as a cured epoxy resin is small. Moreover, it is so preferable that crystallinity is high also from a viewpoint of low thermal expansibility and a heat resistant improvement.
- the endothermic amount here refers to the endothermic amount obtained by measuring with a differential thermal analyzer under the condition of a heating rate of 10 ° C./min under a nitrogen stream using a sample that is precisely weighed about 10 mg.
- the cured epoxy resin product of the present invention can be obtained by heating and curing by the above molding method.
- the molding temperature is from 80 ° C. to 250 ° C., but in order to increase the crystallinity of the cured epoxy resin product. It is desirable to cure at a temperature lower than the melting point of the cured product.
- a preferred curing temperature is in the range of 100 ° C to 200 ° C, more preferably 130 ° C to 180 ° C.
- the preferred curing time is 30 seconds to 1 hour, more preferably 1 minute to 30 minutes.
- the crystallinity can be further increased by post-cure.
- the post-cure temperature is 130 ° C.
- the time is in the range of 1 hour to 20 hours, but preferably 1 hour at a temperature 5 ° C. to 40 ° C. lower than the endothermic peak temperature in differential thermal analysis. It is desirable to perform post-cure over 24 hours from the beginning.
- Reference example 1 150.0 g of hydroquinone was dissolved in 1260 g of epichlorohydrin and 120 g of diethylene glycol dimethyl ether, and 22.7 g of 48% sodium hydroxide was added at 60 ° C. and stirred for 1 hour. Then, under reduced pressure (about 130 Torr), 204.5 g of 48% sodium hydroxide aqueous solution was added dropwise over 3 hours. During this time, the generated water was removed from the system by azeotropy with epichlorohydrin, and the distilled epichlorohydrin was returned to the system. After completion of the dropwise addition, the reaction was further continued for 1 hour, followed by dehydration.
- hydrolyzable chlorine is obtained by dissolving 0.5 g of a sample in 30 ml of dioxane, adding 1N-KOH, 10 ml, boiling and refluxing for 30 minutes, cooling to room temperature, and further adding 100 ml of 80% acetone water. Is a value measured by performing potentiometric titration with 0.002N-AgNO 3 aqueous solution.
- the melting point is a value obtained by a capillary method at a heating rate of 2 ° C./min. Viscosity was measured with CAP2000H manufactured by BROOKFIELD, and softening point was measured by ring and ball method according to JIS K-6911. In addition, GPC measurement was performed by using an apparatus: 515A type manufactured by Nippon Waters Co., Ltd., column: TSK-GEL2000 ⁇ 3 and TSK-GEL4000 ⁇ 1 (both manufactured by Tosoh Corporation), solvent: tetrahydrofuran, flow rate: 1 ml / min, temperature; 38 ° C., detector; RI conditions were followed.
- Reference example 2 100.0 g of 4,4′-dihydroxybiphenyl was dissolved in 700 g of epichlorohydrin and 105 g of diethylene glycol dimethyl ether, and then 87.8 g of 48% aqueous sodium hydroxide solution was added dropwise at 60 ° C. under reduced pressure (about 130 Torr) over 3 hours. . During this time, the generated water was removed from the system by azeotropy with epichlorohydrin, and the distilled epichlorohydrin was returned to the system. After completion of the dropping, the reaction was continued for another hour, followed by dehydration, cooling to room temperature, and filtration to collect the precipitate.
- Example 1 Hydroquinone 50.0 g and 4,4′-dihydroxybiphenyl 100.0 g were dissolved in epichlorohydrin 1000 g and diethylene glycol dimethyl ether 150 g, and 16.5 g of 48% sodium hydroxide was added at 60 ° C. and stirred for 1 hour. Then, under reduced pressure (about 130 Torr), 148.8 g of 48% aqueous sodium hydroxide solution was added dropwise over 3 hours. During this time, the generated water was removed from the system by azeotropy with epichlorohydrin, and the distilled epichlorohydrin was returned to the system. After completion of the dropwise addition, the reaction was further continued for 1 hour, followed by dehydration.
- Example 2 Hydroquinone 75.0 g and 4,4′-dihydroxybiphenyl 75.0 g were dissolved in epichlorohydrin 1000 g and diethylene glycol dimethyl ether 150 g, and 18.1 g of 48% sodium hydroxide was added at 60 ° C. and stirred for 1 hour. Thereafter, under reduced pressure (about 130 Torr), 162.7 g of 48% sodium hydroxide aqueous solution was added dropwise over 3 hours. During this time, the generated water was removed from the system by azeotropy with epichlorohydrin, and the distilled epichlorohydrin was returned to the system. After completion of the dropwise addition, the reaction was further continued for 1 hour, followed by dehydration.
- Example 3 Hydroquinone 125.0 g and 4,4′-dihydroxybiphenyl 25.0 g were dissolved in epichlorohydrin 1200 g and diethylene glycol dimethyl ether 180 g, and 21.2 g of 48% sodium hydroxide was added at 60 ° C. and stirred for 1 hour. Thereafter, 190.6 g of a 48% aqueous sodium hydroxide solution was added dropwise over 3 hours under reduced pressure (about 130 Torr). During this time, the generated water was removed from the system by azeotropy with epichlorohydrin, and the distilled epichlorohydrin was returned to the system.
- Examples 4-8, Comparative Examples 1-5 As the epoxy resin component, the modified epoxy resins of Examples 1 to 3 (referred to as epoxy resin A, epoxy resin B, and epoxy resin C in the order of the example numbers), epoxy resin of reference example 1 (epoxy resin D), and reference example 2 epoxy resin (epoxy resin E), biphenyl epoxy resin (epoxy resin F: made by Japan Epoxy Resin, YX-4000H; epoxy equivalent 195), phenol aralkyl resin (curing agent A: Mitsui Chemicals, XL) as a curing agent -225-LL; OH equivalent 174, softening point 75 ° C.), hydroquinone (curing agent B), 4,4′-dihydroxydiphenyl ether (curing agent C), triphenylphosphine as curing accelerator, spherical alumina as inorganic filler Using (average particle size 12.2 ⁇ m), blend the ingredients and amounts shown in Table 1 and use a mixer After combined, it cooled those kne
- the evaluation method is as follows.
- Thermal conductivity was measured by the unsteady hot wire method using an LFA447 type thermal conductivity meter manufactured by NETZSCH.
- Melting point and heat of fusion were measured using a differential scanning calorimeter (DSC6200 manufactured by Seiko Instruments Inc.) at a heating rate of 10 ° C./min.
- the linear expansion coefficient and the glass transition temperature were measured at a temperature increase rate of 10 ° C./min using a TMA120C type thermomechanical measuring device manufactured by Seiko Instruments Inc.
- the water absorption rate was defined as the rate of change in weight after forming a disk having a diameter of 50 mm and a thickness of 3 mm, post-curing, and absorbing moisture for 100 hours at 85 ° C. and a relative humidity of 85%.
- the modified epoxy resin and the epoxy resin composition of the present invention provide a cured product excellent in moldability and reliability, and excellent in high thermal conductivity, low water absorption, low thermal expansion, and high heat resistance. It is suitably applied as an insulating material for electrical and electronic parts such as laminates and heat dissipation boards, and exhibits excellent high heat dissipation and dimensional stability.
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Abstract
Description
1) 無機充填材の含有率が80~96wt%であること。
2) 硬化剤がフェノール系硬化剤であること。
3) フェノール系硬化剤として、二官能性フェノール化合物を50wt%以上用いること。
4) 上記二官能性フェノール化合物が、ヒドロキノン、4,4’-ジヒドロキシビフェニル、4,4’-ジヒドロキシジフェニルエーテル、1,4-ビス(4-ヒドロキシフェノキシ)ベンゼン、4,4’-ジヒドロキシジフェニルメタン、4,4’-ジヒドロキシジフェニルスルフィド、1,5-ナフタレンジオール、2,7-ナフタレンジオール及び2,6-ナフタレンジオールからなる群れより選ばれる少なくとも1種であること。
5) 無機充填材として、球状のアルミナを無機充填剤の50wt%以上用いること
ヒドロキノン150.0gをエピクロルヒドリン1260g、ジエチレングリコールジメチルエーテル120gに溶解し、60℃にて48%水酸化ナトリウムを22.7g加え1時間攪拌した。その後、減圧下(約130Torr)、48%水酸化ナトリウム水溶液204.5gを3時間かけて滴下した。この間、生成する水はエピクロルヒドリンとの共沸により系外に除き、留出したエピクロルヒドリンは系内に戻した。滴下終了後、さらに1時間反応を継続して脱水後、エピクロルヒドリンを留去し、メチルイソブチルケトン600gを加えた後、水洗を行い塩を除いた。その後、85℃にて48%水酸化ナトリウムを20.0g添加して1時間攪拌し、温水200mLで水洗した。その後、分液により水を除去後、メチルイソブチルケトンを減圧留去し、白色結晶状のエポキシ樹脂278gを得た。エポキシ当量は117であり、加水分解性塩素は310ppm、キャピラリー法による融点は84℃から101℃であり、120℃での粘度は1.8mPa・sであった。得られた樹脂のGPC測定より求められたヒドロキノンより得られるエポキシ樹脂の各成分比は、n=0(単量体)が85.7%、n=1(ジ体)が9.1%、n=2(トリ体)が1.6%であった。ここで、加水分解性塩素とは、試料0.5gをジオキサン30mlに溶解後、1N-KOH、10mlを加え30分間煮沸還流した後、室温まで冷却し、さらに80%アセトン水100mlを加えたものを、0.002N-AgNO3水溶液で電位差滴定を行うことにより測定された値である。また融点とは、キャピラリー法により昇温速度2℃/分で得られる値である。粘度はBROOKFIELD製、CAP2000Hで測定し、軟化点はJIS K-6911に従い環球法で測定した。また、GPC測定は、装置;日本ウォーターズ(株)製、515A型、カラム;TSK-GEL2000×3本及びTSK-GEL4000×1本(いずれも東ソー(株)製)、溶媒;テトラヒドロフラン、流量;1 ml/min、温度;38℃、検出器;RIの条件に従った。
4,4’-ジヒドロキシビフェニル100.0gをエピクロルヒドリン700g、ジエチレングリコールジメチルエーテル105gに溶解し、その後、減圧下(約130Torr)60℃にて、48%水酸化ナトリウム水溶液87.8gを3時間かけて滴下した。この間、生成する水はエピクロルヒドリンとの共沸により系外に除き、留出したエピクロルヒドリンは系内に戻した。滴下終了後、さらに1時間反応を継続して脱水後、常温に冷却し、濾過して析出物を回収した。その後、析出物を水洗して塩を除き、さらに乾燥して結晶性粉末状のエポキシ樹脂137gを得た。エポキシ当量は163、キャピラリー法による融点は169℃から175℃であった。得られた樹脂のGPC測定より求められた一般式(1)における各成分比は、n=0が93.7%、n=1が5.9%であった。
ヒドロキノン50.0g、4,4’-ジヒドロキシビフェニル100.0gをエピクロルヒドリン1000g、ジエチレングリコールジメチルエーテル150gに溶解し、60℃にて48%水酸化ナトリウムを16.5g加え1時間攪拌した。その後、減圧下(約130Torr)、48%水酸化ナトリウム水溶液148.8gを3時間かけて滴下した。この間、生成する水はエピクロルヒドリンとの共沸により系外に除き、留出したエピクロルヒドリンは系内に戻した。滴下終了後、さらに1時間反応を継続して脱水後、エピクロルヒドリンを留去し、メチルイソブチルケトン600gを加えた後、水洗を行い塩を除いた。その後、85℃にて48%水酸化ナトリウムを13.5g添加して1時間攪拌し、温水200mLで水洗した。その後、分液により水を除去後、メチルイソブチルケトンを減圧留去し、白色結晶状の変性エポキシ樹脂(エポキシ樹脂A)224gを得た。エポキシ当量は139であり、加水分解性塩素は320ppm、キャピラリー法による融点は104℃から141℃であり、150℃での粘度は3.4mPa・sであった。GPC測定より求められたヒドロキノンより得られるエポキシ樹脂のn=0(単量体)は23.1%、n=1(ジ体)は2.2%であった。また、4,4’-ジヒドロキシビフェニルより得られるエポキシ樹脂のn=0(単量体)は67.2%、n=1(ジ体)は4.1%であった。
ヒドロキノン75.0g、4,4’-ジヒドロキシビフェニル75.0gをエピクロルヒドリン1000g、ジエチレングリコールジメチルエーテル150gに溶解し、60℃にて48%水酸化ナトリウムを18.1g加え1時間攪拌した。その後、減圧下(約130Torr)、48%水酸化ナトリウム水溶液162.7gを3時間かけて滴下した。この間、生成する水はエピクロルヒドリンとの共沸により系外に除き、留出したエピクロルヒドリンは系内に戻した。滴下終了後、さらに1時間反応を継続して脱水後、エピクロルヒドリンを留去し、メチルイソブチルケトン540gを加えた後、水洗を行い塩を除いた。その後、85℃にて48%水酸化ナトリウムを13.5g添加して1時間攪拌し、温水200mLで水洗した。その後、分液により水を除去後、メチルイソブチルケトンを減圧留去し、白色結晶状の変性エポキシ樹脂(エポキシ樹脂B)214gを得た。エポキシ当量は135であり、加水分解性塩素は380ppm、キャピラリー法による融点は108℃から119℃であり、150℃での粘度は2.3mPa・sであった。GPC測定より求められたヒドロキノンより得られるエポキシ樹脂のn=0(単量体)は53.1%、n=1(ジ体)は34.2%であった。また、4,4’-ジヒドロキシビフェニルより得られるエポキシ樹脂のn=0(単量体)は7.2%、n=1(ジ体)は4.3%であった。
ヒドロキノン125.0g、4,4’-ジヒドロキシビフェニル25.0gをエピクロルヒドリン1200g、ジエチレングリコールジメチルエーテル180gに溶解し、60℃にて48%水酸化ナトリウムを21.2g加え1時間攪拌した。その後、減圧下(約130Torr)、48%水酸化ナトリウム水溶液190.6gを3時間かけて滴下した。この間、生成する水はエピクロルヒドリンとの共沸により系外に除き、留出したエピクロルヒドリンは系内に戻した。滴下終了後、さらに1時間反応を継続して脱水後、エピクロルヒドリンを留去し、メチルイソブチルケトン560gを加えた後、水洗を行い塩を除いた。その後、85℃にて48%水酸化ナトリウムを13.5g添加して1時間攪拌し、温水200mLで水洗した。その後、分液により水を除去後、メチルイソブチルケトンを減圧留去し、白色結晶状の変性エポキシ樹脂(エポキシ樹脂C)265gを得た。エポキシ当量は124であり、加水分解性塩素は390ppm、キャピラリー法による融点は86℃から105℃であり、150℃での粘度は0.8mPa・sであった。GPC測定より求められたヒドロキノンより得られるエポキシ樹脂のn=0(単量体)は80.1%、n=1(ジ体)は2.2%であった。また、4,4’-ジヒドロキシビフェニルより得られるエポキシ樹脂のn=0(単量体)は13.1%、n=1(ジ体)は3.0%であった。
エポキシ樹脂成分として、実施例1から実施例3の変性エポキシ樹脂(実施例番号順に、エポキシ樹脂A、エポキシ樹脂B、エポキシ樹脂Cという)、参考例1のエポキシ樹脂(エポキシ樹脂D)、参考例2のエポキシ樹脂(エポキシ樹脂E)、ビフェニル系エポキシ樹脂(エポキシ樹脂F:ジャパンエポキシレジン製、YX-4000H;エポキシ当量195)、硬化剤として、フェノールアラルキル樹脂(硬化剤A:三井化学製、XL-225-LL;OH当量174、軟化点75℃)、ヒドロキノン(硬化剤B)、4,4’-ジヒドロキシジフェニルエーテル(硬化剤C)、硬化促進剤としてトリフェニルホスフィン、無機充填材として、球状アルミナ(平均粒径12.2μm)を用いて、表1に示す成分と量を配合し、ミキサーで十分混合した後、加熱ロールで約5分間混練したものを冷却し、粉砕してそれぞれ実施例4~8、比較例1~5のエポキシ樹脂組成物を得た。このエポキシ樹脂組成物を用いて170℃、5分の条件で成形後、170℃で12時間ポストキュアを行い硬化成形物を得てその物性を評価した。実施例の結果をまとめて表1に示し、比較例の結果を表2に示す。なお、表1及び表2中の各配合物の数字は重量部を表す。また、比較例5は成形不良のため硬化成形物の物性の評価ができなかった。
(2)融点、融解熱(DSC法)は、示差走査熱量分析装置(セイコーインスツル製DSC6200型)を用い、昇温速度10℃/分で測定した。
(3)線膨張係数、ガラス転移温度は、セイコーインスツル(株)製TMA120C型熱機械測定装置を用いて、昇温速度10℃/分にて測定した。
(4)吸水率は、直径50mm、厚さ3mmの円盤を成形し、ポストキュア後、85℃、相対湿度85%の条件で100時間吸湿させた後の重量変化率とした。
Claims (11)
- ヒドロキノン1重量部に対し、4,4’-ジヒドロキシビフェニル0.1~10重量部を混合した混合物と、エピクロロヒドリンを反応させて得られることを特徴とする常温で結晶性を有する変性エポキシ樹脂。
- (A)エポキシ樹脂、(B)硬化剤、及び(C)無機充填材を主成分とするエポキシ樹脂組成物において、エポキシ樹脂として請求項1に記載の変性エポキシ樹脂を50wt%以上用いることを特徴とするエポキシ樹脂組成物。
- 無機充填材の含有率が80~96wt%である請求項2に記載のエポキシ樹脂組成物。
- 硬化剤がフェノール系硬化剤である請求項2に記載のエポキシ樹脂組成物。
- 硬化剤として、二官能性フェノール化合物を50wt%以上用いる請求項2に記載のエポキシ樹脂組成物。
- 二官能性フェノール化合物が、ヒドロキノン、4,4’-ジヒドロキシビフェニル、4,4’-ジヒドロキシジフェニルエーテル、1,4-ビス(4-ヒドロキシフェノキシ)ベンゼン、4,4’-ジヒドロキシジフェニルメタン、4,4’-ジヒドロキシジフェニルスルフィド、1,5-ナフタレンジオール、2,7-ナフタレンジオール、2,6-ナフタレンジオール及びレゾルシンからなる群れより選ばれる少なくとも1種である請求項5に記載のエポキシ樹脂組成物。
- 無機充填材として、球状のアルミナを50wt%以上用いる請求項2に記載のエポキシ樹脂組成物。
- 半導体封止用のエポキシ樹脂組成物であることを特徴とする請求項2に記載のエポキシ樹脂組成物。
- 請求項2に記載のエポキシ樹脂組成物を硬化して得られ、熱伝導率が4W/m・K以上であることを特徴とする硬化物。
- 硬化物の走査示差熱分析における融点のピークが120℃から280℃の範囲にある請求項9に記載の硬化物。
- 硬化物の走査示差熱分析における樹脂成分換算の吸熱量が10J/g以上である請求項9に記載の硬化物。
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WO2015037590A1 (ja) * | 2013-09-12 | 2015-03-19 | 日本化薬株式会社 | エポキシ樹脂混合物、エポキシ樹脂組成物、硬化物および半導体装置 |
WO2015060306A1 (ja) * | 2013-10-23 | 2015-04-30 | 日本化薬株式会社 | エポキシ樹脂混合物、エポキシ樹脂組成物、プリプレグ、およびその硬化物 |
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JP2020041050A (ja) * | 2018-09-10 | 2020-03-19 | 日立化成株式会社 | エポキシ樹脂、エポキシ樹脂組成物、エポキシ樹脂硬化物及び複合材料 |
JP2020041048A (ja) * | 2018-09-10 | 2020-03-19 | 日立化成株式会社 | エポキシ樹脂、エポキシ樹脂組成物、エポキシ樹脂硬化物及び複合材料 |
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KR20220002107A (ko) | 2020-06-30 | 2022-01-06 | 닛테츠 케미컬 앤드 머티리얼 가부시키가이샤 | 에폭시 수지, 에폭시 수지 조성물 및 경화물 |
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JP7119801B2 (ja) | 2018-09-10 | 2022-08-17 | 昭和電工マテリアルズ株式会社 | エポキシ樹脂、エポキシ樹脂組成物、エポキシ樹脂硬化物及び複合材料 |
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Also Published As
Publication number | Publication date |
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KR20100134594A (ko) | 2010-12-23 |
TW200948843A (en) | 2009-12-01 |
JP5320384B2 (ja) | 2013-10-23 |
CN102083881A (zh) | 2011-06-01 |
JPWO2009110424A1 (ja) | 2011-07-14 |
TWI498348B (zh) | 2015-09-01 |
CN102083881B (zh) | 2013-01-23 |
KR101524485B1 (ko) | 2015-06-01 |
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