WO2021039732A1 - 熱伝導材料形成用組成物、熱伝導材料、熱伝導シート、熱伝導層付きデバイス - Google Patents
熱伝導材料形成用組成物、熱伝導材料、熱伝導シート、熱伝導層付きデバイス Download PDFInfo
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- BHZCMUVGYXEBMY-UHFFFAOYSA-N trilithium;azanide Chemical compound [Li+].[Li+].[Li+].[NH2-] BHZCMUVGYXEBMY-UHFFFAOYSA-N 0.000 description 1
- JLGNHOJUQFHYEZ-UHFFFAOYSA-N trimethoxy(3,3,3-trifluoropropyl)silane Chemical compound CO[Si](OC)(OC)CCC(F)(F)F JLGNHOJUQFHYEZ-UHFFFAOYSA-N 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
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- ZVWKZXLXHLZXLS-UHFFFAOYSA-N zirconium nitride Chemical compound [Zr]#N ZVWKZXLXHLZXLS-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
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- 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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- C08G59/20—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 epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
- C08G59/245—Di-epoxy compounds carbocyclic aromatic
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- 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
- C08G59/20—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 epoxy compounds used
- C08G59/32—Epoxy compounds containing three or more epoxy groups
- C08G59/3218—Carbocyclic compounds
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- C08G59/20—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 epoxy compounds used
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- C08G59/3236—Heterocylic compounds
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- C08G59/20—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 epoxy compounds used
- C08G59/32—Epoxy compounds containing three or more epoxy groups
- C08G59/34—Epoxy compounds containing three or more epoxy groups obtained by epoxidation of an unsaturated polymer
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- 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
- C08G59/68—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 catalysts used
- C08G59/688—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 catalysts used containing phosphorus
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- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C08L83/04—Polysiloxanes
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Definitions
- the present invention relates to a composition for forming a heat conductive material, a heat conductive material, a heat conductive sheet, and a device with a heat conductive layer.
- a heat conductive sheet provided with a sheet body formed of a heat-curable resin composition, and the heat-curable resin composition comprises a heat-curable resin and inorganic nitride particles.
- the inorganic nitride particles contains 50% by volume or more of the inorganic nitride particles, and the inorganic nitride particles contain aluminum nitride particles having a particle size of 30 ⁇ m or less in a proportion of 15% by volume or more, and nitrided with a particle size of 20 ⁇ m or less.
- a thermally conductive sheet containing aluminum particles in a proportion of 10% by volume or more and containing aluminum nitride particles having a particle size of 10 ⁇ m or less in a proportion of 5% by volume or more (claim 1) ”is disclosed.
- the inorganic nitride particles those in which a part or all of the surface thereof is treated with a silane coupling agent have been proposed (claim 3).
- Epoxy compounds and Inorganic substances and It has one or more functional groups selected from the group consisting of an alkenyl group, an acrylate group, a methacrylate group, a silyl group, an acid anhydride group, a cyanate ester group, an amino group, a thiol group, and a carboxylic acid group, or has a polyamic acid structure.
- the content of the inorganic substance is 10% by mass or more with respect to the total solid content of the composition.
- a composition for forming a heat conductive material, wherein the content of the compound X is 10% by mass or more with respect to the total solid content of the composition.
- composition for forming a heat conductive material according to [1], which further contains a phenol compound [3] The composition for forming a heat conductive material according to [2], wherein the phenol compound has a hydroxyl group content of 12.0 mmol / g or more. [4] The composition for forming a heat conductive material according to [2] or [3], wherein the phenol compound has a molecular weight of 400 or less. [5] Of [1] to [4], the compound X has one or more functional groups selected from the group consisting of an alkenyl group, an acrylate group, a methacrylate group, and a silyl group, or has a polyamic acid structure.
- composition for forming a heat conductive material according to any one.
- [6] The above-mentioned compound X according to any one of [1] to [5], wherein the compound X is a linear or branched organopolysiloxane and has two or more alkenyl groups bonded to a silicon atom.
- Composition for forming a heat conductive material Composition for forming a heat conductive material.
- [7] The composition for forming a heat conductive material according to any one of [1] to [6], wherein the content of the compound X is 15 to 35% by mass with respect to the total solid content of the composition.
- [8] The composition for forming a heat conductive material according to any one of [1] to [7], wherein the inorganic substance contains an inorganic nitride.
- the present invention it is possible to provide a composition for forming a heat conductive material that can provide a heat conductive material having excellent thermal conductivity. Further, according to the present invention, it is possible to provide a heat conductive material, a heat conductive sheet, and a device with a heat conductive layer formed by the above composition for forming a heat conductive material.
- the composition for forming a heat conductive material, the heat conductive material, the heat conductive sheet, and the device with the heat conductive layer of the present invention will be described in detail.
- the description of the constituent elements described below may be based on the representative embodiments of the present invention, but the present invention is not limited to such embodiments.
- the numerical range represented by using "-" means a range including the numerical values before and after "-" as the lower limit value and the upper limit value.
- the oxylanyl group is a functional group also called an epoxy group.
- two adjacent carbon atoms of a saturated hydrocarbon ring group are bonded by an oxo group (—O—) to form an oxylan ring.
- the oxylanyl group also includes such groups.
- the oxylanyl group may or may not have a substituent (such as a methyl group), if possible.
- (meth) acryloyl group means “one or both of acryloyl group and methacryloyl group”.
- (meth) acrylamide group means “one or both of an acrylamide group and a methacrylamide group”.
- (meth) acrylate group means “one or both of an acrylate group and a methacrylate group”.
- the acid anhydride group may be a monovalent group or a divalent group.
- a substituent obtained by removing an arbitrary hydrogen atom from an acid anhydride such as maleic anhydride, phthalic anhydride, pyromellitic anhydride, and trimellitic anhydride.
- the acid anhydride group represents a divalent group, the group represented by * -CO-O-CO- * is intended (* represents a bond position).
- the type of the substituent, the position of the substituent, and the number of the substituents in the case of “may have a substituent” are not particularly limited.
- the number of substituents may be, for example, one or two or more.
- the substituent include a monovalent non-metal atomic group excluding a hydrogen atom, and for example, it can be selected from the following substituent group Y.
- Substituent group Y Halogen atom (-F, -Br, -Cl, -I), hydroxyl group, amino group, carboxylic acid group and its conjugate base group, carboxylic acid anhydride group, cyanate ester group, unsaturated polymerizable group, oxylanyl group, oxetanyl group , Aziridinyl group, thiol group, isocyanate group, thioisocyanate group, aldehyde group, alkoxy group, allyloxy group, alkylthio group, arylthio group, alkyldithio group, aryldithio group, N-alkylamino group, N, N-dialkylamino group , N-arylamino group, N, N-diarylamino group, N-alkyl-N-arylamino group, acyloxy group, carbamoyloxy group, N-alkylcarbamoyloxy group,
- the weight average molecular weight is defined as a polystyrene-equivalent value by a GPC (Gel Permeation Chromatography) method.
- composition The composition for forming a heat conductive material of the present invention (hereinafter, also simply referred to as “composition”) is Epoxy compounds and Inorganic substances and A composition for forming a heat conductive material containing compound X,
- the content of the inorganic substance is 10% by mass or more with respect to the total solid content of the composition.
- the content of the compound X is 10% by mass or more with respect to the total solid content of the composition.
- the compound X has one or more functional groups selected from the group consisting of an alkenyl group, an acrylate group, a methacrylate group, a silyl group, an acid anhydride group, a cyanate ester group, an amino group, a thiol group, and a carboxylic acid group.
- compound X1 a compound having a polyamic acid structure
- compound X2 a compound having a polyamic acid structure
- the mechanism by which the composition of the present invention solves the problem of the present invention with the above-mentioned constitution is not always clear, but the present inventors speculate as follows. That is, when the composition of the present invention contains the compound X1 in a predetermined amount, a crosslinked structure by a reaction between the epoxy compound and the compound X1 and / or a crosslinked structure by a reaction between the compounds X1 is likely to be formed, and the compactness has many crosslink points. Bridge structure is easily formed.
- composition of the present invention contains the above compound X2 in a predetermined amount, a dense crosslinked structure is likely to be formed by the intermolecular interaction of the polyamic acid structure. That is, it is presumed that when the composition of the present invention contains the compound X in a predetermined amount, a dense crosslinked structure is likely to be formed, and the thermal conductivity of the obtained heat conductive material is improved.
- the composition of the present invention further contains a phenol compound
- the above-mentioned effects are even more excellent.
- the epoxy compound acts as a so-called main agent, and the phenol compound acts as a so-called curing agent.
- the composition of the present invention contains the above-mentioned compound X (compound X1 and / or the above-mentioned compound X2) in a predetermined amount and contains a phenol compound, in addition to the above-mentioned dense crosslinked structure based on the above-mentioned compound X, an epoxy compound is further added. Since a crosslinked structure between the compound and the phenol compound is also formed, the above-mentioned effect is further excellent.
- the composition of the present invention exhibits excellent thermal conductivity by containing a predetermined amount of an inorganic substance. Further, the heat conductive material obtained from the composition of the present invention has good insulating properties (electrically insulating properties) and adhesiveness.
- the composition of the present invention contains an epoxy compound.
- An epoxy compound is a compound having at least one epoxy group (oxylanyl group) in one molecule. Epoxy groups may or may not have substituents, if possible.
- the number of epoxy groups contained in the epoxy compound is preferably 2 or more, more preferably 2 to 40, still more preferably 2 to 10, and particularly preferably 2 in one molecule.
- the molecular weight of the epoxy compound is preferably 150 to 10000, more preferably 150 to 2000, and even more preferably 200 to 600.
- the lower limit of the epoxy group content of the epoxy compound is preferably 2.0 mmol / g or more, more preferably 4.0 mmol / g or more, and further preferably 5.0 mmol / g or more.
- the upper limit is preferably 20.0 mmol / g or less, more preferably 15.0 mmol / g or less, and even more preferably 10.0 mmol / g or less.
- the epoxy group content is intended to be the number of epoxy groups contained in 1 g of the epoxy compound.
- the epoxy compound is preferably in a liquid state at room temperature (23 ° C.).
- the epoxy compound may or may not exhibit liquid crystallinity. That is, the epoxy compound may be a liquid crystal compound. In other words, a liquid crystal compound having an epoxy group can also be used as the epoxy compound.
- the epoxy compound (which may be a liquid crystal epoxy compound) include a compound having at least a rod-like structure (rod-like compound) and a compound having a disk-like structure at least partially. .. Of these, rod-shaped compounds are preferable because the obtained heat conductive material has more excellent thermal conductivity.
- the rod-shaped compound and the disk-shaped compound will be described in detail.
- epoxy compound which is a rod-shaped compound examples include azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenylcyclohexanes, cyano-substituted phenylpyrimidines, and alkoxy. Substituted phenylpyrimidines, phenyldioxans, trans, and alkenylcyclohexylbenzonitriles are included. Not only the above low molecular weight compounds but also high molecular weight compounds can be used.
- the above-mentioned polymer compound is a polymer compound obtained by polymerizing a rod-shaped compound having a low molecular weight reactive group.
- Preferred rod-shaped compounds include rod-shaped compounds represented by the following general formula (XXI).
- Q 1 and Q 2 are independent epoxy groups, and L 111 , L 112 , L 113 , and L 114 each independently represent a single bond or a divalent linking group.
- a 111 and A 112 each independently represent a divalent linking group (spacer group) having 1 to 20 carbon atoms.
- M represents a mesogen group.
- Epoxy group of Q 1 and Q 2 may be substituted or may not have.
- L 111 , L 112 , L 113 , and L 114 each independently represent a single bond or a divalent linking group.
- the divalent linking groups represented by L 111 , L 112 , L 113 , and L 114 are independently -O-, -S-, -CO-, -NR 112- , and -CO-O-, respectively.
- R 112 is an alkyl group or a hydrogen atom having 1 to 7 carbon atoms.
- L 113 and L 114 are preferably —O— independently of each other.
- L 111 and L 112 are preferably single bonds independently of each other.
- a 111 and A 112 each independently represent a divalent linking group having 1 to 20 carbon atoms.
- the divalent linking group may contain heteroatoms such as non-adjacent oxygen and sulfur atoms.
- an alkylene group, an alkenylene group, or an alkynylene group having 1 to 12 carbon atoms is preferable.
- the above-mentioned alkylene group, alkenylene group, or alkynylene group may or may not have an ester group.
- the divalent linking group is preferably linear, and the divalent linking group may or may not have a substituent.
- Substituents include, for example, halogen atoms (fluorine atom, chlorine atom, and bromine atom), cyano group, methyl group, and ethyl group.
- a 111 and A 112 are each independently preferably an alkylene group having 1 to 12 carbon atoms, and more preferably a methylene group.
- M represents a mesogen group, and examples of the mesogen group include known mesogen groups. Of these, a group represented by the following general formula (XXII) is preferable.
- W 1 and W 2 independently represent a divalent cyclic alkylene group, a divalent cyclic alkenylene group, an arylene group, or a divalent heterocyclic group, respectively.
- L 115 represents a single bond or a divalent linking group.
- n represents an integer of 1 to 4.
- W 1 and W 2 examples include 1,4-cyclohexenediyl, 1,4-cyclohexanediyl, 1,4-phenylene, pyrimidine-2,5-diyl, pyridine-2,5-diyl, 1,3. 4-Thiadiazole-2,5-diyl, 1,3,4-oxadiazole-2,5-diyl, naphthalene-2,6-diyl, naphthalene-1,5-diyl, thiophene-2,5-diyl, And pyridazine-3,6-diyl.
- W 1 and W 2 may each have a substituent.
- substituents include the groups exemplified in the above-mentioned substituent group Y, and more specifically, a halogen atom (fluorine atom, chlorine atom, bromine atom, and iodine atom), cyano group, and carbon number.
- Alkyl group of 1 to 10 (for example, methyl group, ethyl group, propyl group, etc.), alkoxy group having 1 to 10 carbon atoms (for example, methoxy group, ethoxy group, etc.), acyl group having 1 to 10 carbon atoms (for example, methoxy group, ethoxy group, etc.)
- a formyl group and an acetyl group, etc. an alkoxycarbonyl group having 1 to 10 carbon atoms (for example, a methoxycarbonyl group and an ethoxycarbonyl group, etc.), an acyloxy group having 1 to 10 carbon atoms (for example, an acetyloxy group, and an acetyloxy group).
- Propionyloxy group, etc. nitro group, trifluoromethyl group, difluoromethyl group and the like.
- L 115 represents a single bond or a divalent linking group.
- the divalent linking group represented by L 115 include specific examples of the divalent linking groups represented by L 111 to L 114 described above, and examples thereof include -CO-O- and -O-CO-. , -CH 2- O-, and -O-CH 2- .
- the plurality of L 115s may be the same or different from each other.
- the preferred skeleton of the basic skeleton of the mesogen group represented by the above general formula (XXII) is illustrated below.
- the mesogen groups may be substituted with substituents on these skeletons.
- the biphenyl skeleton is preferable in that the obtained heat conductive material has more excellent thermal conductivity.
- the compound represented by the general formula (XXI) can be synthesized by referring to the method described in JP-A No. 11-513019 (WO97 / 00600).
- the rod-shaped compound may be a monomer having a mesogen group described in JP-A-11-323162 and Patent No. 4118691.
- the rod-shaped compound is preferably a compound represented by the general formula (E1).
- LE1 independently represents a single bond or a divalent linking group. Of these, LE1 is preferably a divalent linking group.
- the alkylene group may be linear, branched or cyclic, but a linear alkylene group having 1 to 2 carbon atoms is preferable.
- a plurality of LE1s may be the same or different from each other.
- L E2 are each independently a single bond, -CO-O-, or -O-CO- is preferred.
- the plurality of LE2s may be the same or different
- LE3 is a 5-membered or 6-membered aromatic ring group or a 5-membered or 6-membered ring which may independently have a single bond or a substituent. Represents a non-aromatic ring group or a polycyclic group composed of these rings.
- aromatic ring groups and non-aromatic ring group represented by L E3, for example, may have a substituent group, 1,4-cyclohexane-diyl group, 1,4-cyclohexene-diyl group, 1 , 4-Phenylene group, pyrimidine-2,5-diyl group, pyridine-2,5-diyl group, 1,3,4-thiadiazol-2,5-diyl group, 1,3,4-oxadiazol-2 , 5-Diyl group, naphthalene-2,6-diyl group, naphthalene-1,5-diyl group, thiophene-2,5-diyl group, and pyridazine-3,6-diyl group.
- a 1,4-cyclohexanediyl group it may be either a trans isomer or a cis structural isomer, or a mixture in any proportion. Of these, a transformer body is preferable.
- L E3 represents a single bond, 1,4-phenylene group, or 1,4-cyclohexene-diyl group are preferable.
- Substituent having a group represented by L E3 each independently represent an alkyl group, an alkoxy group, a halogen atom, a cyano group, a nitro group, or an acetyl group is preferably an alkyl group (preferably having 1 carbon) and more preferably .. When a plurality of substituents are present, the substituents may be the same or different. When there are a plurality of LE3s , the plurality of LE3s may be the same or different.
- pe represents an integer of 0 or more. If pe is the integer of 2 or more, there exist a plurality of (-L E3 -L E2 -) may each be the same or different. Among them, pe is preferably 0 to 2, more preferably 0 or 1, and even more preferably 0.
- LE4 independently represents a substituent.
- the substituent is preferably an alkyl group, an alkoxy group, a halogen atom, a cyano group, a nitro group, or an acetyl group, and more preferably an alkyl group (preferably 1 carbon number).
- a plurality of LE4s may be the same or different from each other. Further, when le described below is an integer of 2 or more, a plurality of LE4s existing in the same (LE4 ) le may be the same or different.
- le independently represents an integer of 0 to 4. Among them, le is preferably 0 to 2 independently of each other. A plurality of le's may be the same or different from each other.
- the epoxy compound which is a disk-shaped compound, has a disk-shaped structure at least partially.
- the disc-like structure has at least an alicyclic or aromatic ring.
- the disk-shaped compound can form a columnar structure by forming a stacking structure by ⁇ - ⁇ interaction between molecules.
- Angew. Chem. Int. Ed. examples thereof include the triphenylene structure described in 2012, 51, 7990-7793 or JP-A-7-306317, and the tri-substituted benzene structure described in JP-A-2007-2220 and JP-A-2010-244038.
- a heat conductive material showing high thermal conductivity can be obtained.
- the rod-shaped compound can conduct heat only linearly (one-dimensionally), whereas the disk-shaped compound can conduct heat planarly (two-dimensionally) in the normal direction, so that the heat conduction path is It is thought that this will increase and the thermal conductivity will improve.
- the disk-shaped compound preferably has three or more epoxy groups.
- a cured product of a composition containing a disk-shaped compound having three or more epoxy groups tends to have a high glass transition temperature and high heat resistance.
- the number of epoxy groups contained in the disk-shaped compound is preferably 8 or less, more preferably 6 or less.
- the disk-shaped compound examples include C.I. Destrade et al. , Mol. Crysr. Liq. Cryst. , Vol. 71, page 111 (1981); Chemical Society of Japan, Quarterly Review of Chemistry, No. 22, Chemistry of liquid crystal, Chapter 5, Chapter 10, Section 2 (1994); Kohne et al. , Angew. Chem. Soc. Chem. Comm. , Page 1794 (1985); Zhang et al. , J. Am. Chem. Soc. , Vol.
- Examples of the compounds described in 116, page 2655 (1994), and Japanese Patent No. 4592225 include compounds having at least one (preferably three or more) epoxy groups at the ends.
- Examples of the disk-shaped compound include Angew. Chem. Int.
- a compound represented by any of the following formulas (D1) to (D16) is preferable from the viewpoint of more excellent thermal conductivity of the heat conductive material.
- the formulas (D1) to (D15) will be described, and then the formulas (D16) will be described.
- "-LQ” represents “-LQ”
- “QL-” represents "QL-”.
- L represents a divalent linking group.
- L is independently derived from an alkylene group, an alkenylene group, an arylene group, -CO-, -NH-, -O-, -S-, and a combination thereof. It is preferable that the group is selected from the group consisting of alkylene group, alkenylene group, arylene group, and two or more groups selected from the group consisting of -CO-, -NH-, -O-, and -S- are combined. More preferably it is a group.
- the alkylene group preferably has 1 to 12 carbon atoms.
- the number of carbon atoms of the alkenylene group is preferably 2 to 12.
- the arylene group preferably has 10 or less carbon atoms.
- the alkylene group, alkenylene group, and arylene group may have a substituent (preferably an alkyl group, a halogen atom, a cyano, an alkoxy group, an acyloxy group, etc.).
- L is shown below.
- the bond on the left side binds to the central structure of the compound represented by any of the formulas (D1) to (D15) (hereinafter, also simply referred to as "central ring"), and the bond on the right side is Q.
- AL means an alkylene group or an alkenylene group
- AR means an arylene group.
- Q independently represents a hydrogen atom or a substituent.
- substituents include the groups exemplified in the above-mentioned Substituent Group Y. More specifically, the substituents include the above-mentioned reactive functional group, halogen atom, isocyanate group, cyano group, unsaturated polymerizable group, epoxy group, oxetanyl group, aziridinyl group, thioisocyanate group, aldehyde group, and sulfo. The group is mentioned. However, when Q is a group other than the epoxy group, it is preferable that Q is stable with respect to the epoxy group.
- one or more (preferably two or more) Qs represent an epoxy group. Among them, it is preferable that all Qs represent epoxy groups from the viewpoint of better thermal conductivity of the heat conductive material.
- the compounds represented by the formulas (D1) to (D15) preferably do not have -NH- from the viewpoint of the stability of the epoxy group.
- the compound represented by the formula (D4) is preferable from the viewpoint of more excellent thermal conductivity of the heat conductive material.
- the central ring of the disk-shaped compound is preferably a triphenylene ring.
- the compound represented by the formula (XI) is preferable from the viewpoint of more excellent thermal conductivity of the heat conductive material.
- R 11, R 12, R 13, R 14, R 15, and R 16 are each independently, * - X 11 -L 11 -P 11, or * -X 12 -L 12 - Represents Y 12.
- * represents the bonding position with the triphenylene ring.
- R 11, R 12, R 13 , R 14, R 15, and of the R 16, two or more may, * - X 11 is -L 11 -P 11, 3 or more is * -X 11 -L 11 -P 11 is preferable.
- any one or more of R 11 and R 12 , one or more of R 13 and R 14 , and any one of R 15 and R 16 are each independently, * - X 11 -L 11 -P 11, or * -X 12 -L 12 - Represents Y 12.
- * represents the bonding position with the triphenylene ring.
- R 11, R 12, R 13 , R 14, R 15, and of the R 16, two or more may, * - X 11 is -L 11 -P 11, 3 or
- R 11 , R 12 , R 13 , R 14 , R 15 , and R 16 are all * -X 11- L 11- P 11.
- R 11 , R 12 , R 13 , R 14 , R 15 and R 16 are all the same.
- X 11 is independently single-bonded, -O-, -CO-, -NH-, -O-CO-, -O-CO-O-, -O-CO-NH-, -O-CO-.
- X 11 is independently of -O-, -O-CO-, -O-CO-O-, -O-CO-NH-, -CO-O-, -CO-NH-,-.
- NH-CO- or -NH-CO-O- is preferable, and -O-, -O-CO-, -CO-O-, -O-CO-NH-, or -CO-NH- is more preferable.
- -O-CO- or -CO-O- is more preferred.
- L 11 independently represents a single bond or a divalent linking group.
- divalent linking groups include -O-, -O-CO-, -CO-O-, -S-, -NH-, and alkylene groups (preferably 1 to 10 carbon atoms, 1 to 8 carbon atoms). Is more preferable, 1 to 7 is more preferable), an arylene group (the number of carbon atoms is preferably 6 to 20, more preferably 6 to 14 and even more preferably 6 to 10), or a group consisting of a combination thereof. Can be mentioned.
- Examples of the alkylene group include a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group, a hexylene group, and a heptylene group.
- Examples of the arylene group include a 1,4-phenylene group, a 1,3-phenylene group, a 1,4-naphthylene group, a 1,5-naphthylene group, and an anthrasenylene group, and a 1,4-phenylene group is preferable.
- the alkylene group and the arylene group may each have a substituent.
- the number of substituents is preferably 1 to 3, and more preferably 1.
- the substitution position of the substituent is not particularly limited.
- As the substituent a halogen atom or an alkyl group having 1 to 3 carbon atoms is preferable, and a methyl group is more preferable. It is also preferable that the alkylene group and the arylene group are unsubstituted. Of these, the alkylene group is preferably unsubstituted.
- P 11 represents an epoxy group.
- the epoxy group may or may not have a substituent.
- X 12 is the same as X 11 , and the preferred conditions are also the same.
- L 12 is the same as L 11 , and the preferred conditions are also the same.
- -X 12 -L 12 - Examples of include examples of the above-mentioned L L101 ⁇ L143.
- Y 12 is a hydrogen atom, a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, or a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms.
- One or more methylene groups were substituted with -O-, -S-, -NH-, -N (CH 3 )-, -CO-, -O-CO-, or -CO-O- Represents a group.
- Y 12 is one or one in a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, or a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms.
- Y 12 may have one or more hydrogen atoms substituted with halogen atoms.
- the compound represented by the formula (XI) conforms to the methods described in JP-A-7-306317, JP-A-7-281028, JP-A-2005-156822, and JP-A-2006-301614. Can be synthesized.
- a compound represented by the formula (D16) is also preferable as the disk-shaped compound.
- R 17X, R 18X, and R 19X are independently * - represents the (Z 21X -X 212X) n21X -L 21X -Q - X 211X. * Represents the connection position with the central ring.
- X 211X and X 212X are independently single-bonded, -O-, -CO-, -NH-, -O-CO-, -O-CO-O-, -O-CO-NH-, -O.
- Z 21X independently represents a 5- or 6-membered aromatic ring group or a 5- or 6-membered non-aromatic ring group, respectively.
- L 21X represents a single bond or a divalent linking group.
- Q is synonymous with Q in the formulas (D1) to (D15), and the preferable conditions are also the same.
- At least one (preferably all) Q among the plurality of Qs present represents an epoxy group.
- n21X represents an integer of 0 to 3.
- a plurality of them Z 21X- X 212X ) may be the same or different.
- the compound represented by the formula (D16) preferably does not have -NH- from the viewpoint of the stability of the epoxy group.
- the compound represented by the formula (D16) As the compound represented by the formula (D16), the compound represented by the formula (XII) is preferable.
- R 17, R 18, and R 19 are each independently, * - X 211 - (Z 21 -X 212) n21 -L 21 -P 21, or * -X 221 - (Z 22 -X 222) n22 - Represents Y 22. * Represents the connection position with the central ring.
- R 17, R 18, and two or more of R 19 is, * - a (Z 21 -X 212) n21 -L 21 -P 21 - X 211.
- all R 17, R 18, and R 19 are, * - preferably a (Z 21 -X 212) n21 -L 21 -P 21 - X 211 .
- X 211 , X 212 , X 221 and X 222 are independently single-bonded, -O-, -CO-, -NH-, -O-CO-, -O-CO-O-, -O-, respectively.
- single bond, —O—, —CO—O—, or —O—CO— is preferable independently.
- Z 21 and Z 22 independently represent a 5- or 6-membered aromatic ring group or a 5- or 6-membered non-aromatic ring group, for example, a 1,4-phenylene group. Examples thereof include a 1,3-phenylene group and an aromatic heterocyclic group.
- the aromatic ring group and the non-aromatic ring group may have a substituent.
- the number of substituents is preferably 1 or 2, more preferably 1.
- the substitution position of the substituent is not particularly limited.
- As the substituent a halogen atom or a methyl group is preferable. It is also preferable that the aromatic ring group and the non-aromatic ring group are unsubstituted.
- aromatic heterocyclic group examples include the following aromatic heterocyclic groups.
- * represents a site that binds to X 211 or X 221.
- ** represents a site that binds to X 212 or X 222.
- a 41 and A 42 each independently represent a methine group or a nitrogen atom.
- X 4 represents an oxygen atom, a sulfur atom, a methylene group, or an imino group. At least one of A 41 and A 42 is preferably a nitrogen atom, and it is more preferable that both are nitrogen atoms. Further, X 4 is preferably an oxygen atom.
- n21 and n22 which will be described later, are two or more, a plurality of (Z 21- X 212 ) and (Z 22- X 222 ) may be the same or different, respectively.
- L 21 independently represents a single bond or a divalent linking group, and is synonymous with L 11 in the above formula (XI).
- Examples of L 21 include -O-, -O-CO-, -CO-O-, -S-, -NH-, and an alkylene group (the number of carbon atoms is preferably 1 to 10 and more preferably 1 to 8). ⁇ 7 is more preferable), an arylene group (the number of carbon atoms is preferably 6 to 20, more preferably 6 to 14, and even more preferably 6 to 10), or a group composed of a combination thereof is preferable.
- n22 is 1 or more, -X 212 -L 21 - Examples of are examples of L in the above formula (D1) ⁇ (D15) L101 ⁇ L143 and the like as well.
- P 21 represents an epoxy group.
- the epoxy group may or may not have a substituent.
- Y 22 is independently a hydrogen atom, a linear, branched, or cyclic alkyl group having 1 to 20 carbon atoms, or a linear, branched, or cyclic group having 1 to 20 carbon atoms.
- One or more methylene groups in the alkyl group of are -O-, -S-, -NH-, -N (CH 3 )-, -CO-, -O-CO-, or -CO-O- It represents a group substituted with, and is synonymous with Y 12 in the general formula (XI), and the preferred range is also the same.
- n21 and n22 independently represents an integer of 0 to 3, and from the viewpoint of better thermal conductivity, an integer of 1 to 3 is preferable, and 2 to 3 is more preferable.
- Preferred examples of the disk-shaped compound include the following compounds.
- R represents -X 212- L 21- P 21 .
- the compound represented by the formula (XII) can be synthesized according to the methods described in JP-A-2010-244038, JP-A-2006-76992, and JP-A-2007-2220.
- the disk-shaped compound is preferably a compound having a hydrogen-bonding functional group from the viewpoint of reducing the electron density, strengthening the stacking, and facilitating the formation of a column-shaped aggregate.
- Hydrogen-bonding functional groups include -O-CO-NH-, -CO-NH-, -NH-CO-, -NH-CO-O-, -NH-CO-NH-, and -NH-CO-S. -Or-S-CO-NH- and the like can be mentioned.
- Examples of the epoxy compound other than the above-mentioned epoxy compound include an epoxy compound represented by the general formula (DN).
- nDN represents an integer of 0 or more, preferably 0 to 5, and more preferably 1.
- RDN represents a single bond or a divalent linking group.
- the divalent linking group is -O-, -O-CO-, -CO-O-, -S-, an alkylene group (preferably having 1 to 10 carbon atoms), and an arylene group (having 6 carbon atoms).
- ⁇ 20 is preferable), or a group composed of a combination thereof is preferable, an alkylene group is more preferable, and a methylene group is more preferable.
- Examples thereof include alicyclic epoxy compounds such as nonan and trisphenol methane type epoxy compounds.
- resorcinol diglycidyl ether and the like can also be used.
- the epoxy compound is a compound represented by any of the general formulas (B01) to (B03) in the surface modifier for inorganic nitride described later, and is a compound having one or more epoxy groups (epoxy group). It is preferable that the compound is different from the compound represented by any of the general formulas (B01) to (B03) having.
- the epoxy compound may be used alone or in combination of two or more.
- the content of the epoxy compound and the above compound X1 and optionally are included.
- the ratio to the total content of the curing agent is the epoxy group of the epoxy compound, the functional group capable of reacting with the epoxy group in the compound X1, and the epoxy group in the curing agent optionally contained.
- the equivalent ratio (number of epoxy groups / number of functional groups capable of reacting with epoxy groups) to the functional groups capable of reacting with is preferably 30/70 to 70/30, preferably 35/65 to 65/35.
- the amount is more preferably 40/60 to 60/40.
- the functional group capable of reacting with the epoxy group in the compound X1 include an acid anhydride group and a cyanate ester group, and active hydrogen contained in an amino group, a thiol group, and a carboxylic acid group.
- the curing agent is a phenol compound described later, a hydroxyl group can be mentioned as a functional group capable of reacting with an epoxy group in the phenol compound.
- the ratio of the content of the epoxy compound to the content of the phenol compound in the composition is the equivalent ratio of the epoxy group of the epoxy compound to the hydroxyl group of the phenol compound (the number of epoxy groups).
- the amount of / number of hydroxyl groups) is preferably 30/70 to 70/30, more preferably 40/60 to 60/40, and even more preferably 45/55 to 55/45.
- the total content of the epoxy compound and the phenol compound in the composition is preferably 5 to 90% by mass, preferably 10 to 50% by mass, based on the total solid content of the composition. More preferably, 10 to 40% by mass is further preferable.
- total solid content is intended as a component forming a heat conductive material, and does not include a solvent.
- the component forming the heat conductive material referred to here may be a component whose chemical structure changes by reacting (polymerizing) when forming the heat conductive material. Further, if it is a component forming a heat conductive material, even if its property is liquid, it is regarded as a solid content.
- the composition of the present invention contains an inorganic substance.
- the inorganic substance for example, any inorganic substance conventionally used for an inorganic filler of a heat conductive material may be used.
- the inorganic substance preferably contains an inorganic nitride or an inorganic oxide, and more preferably contains an inorganic nitride, because the heat conductive material is more excellent in thermal conductivity and insulating property.
- the shape of the inorganic substance is not particularly limited, and may be in the form of particles, a film, or a plate.
- Examples of the shape of the particulate inorganic substance include rice granules, spherical shape, cube shape, spindle shape, scaly shape, agglutinating shape, and indefinite shape.
- inorganic oxide examples include zirconium oxide (ZrO 2 ), titanium oxide (TiO 2 ), silicon oxide (SiO 2 ), aluminum oxide (Al 2 O 3 ), iron oxide (Fe 2 O 3 , FeO, Fe 3).
- Examples include rutenium (RuO 2 ). Only one kind of the above-mentioned inorganic oxide may be used, or two or more kinds may be used.
- the inorganic oxide is preferably titanium oxide, aluminum oxide, or zinc oxide, and more preferably aluminum oxide.
- the inorganic oxide may be an oxide produced by oxidizing a metal prepared as a non-oxide in an environment or the like.
- inorganic nitride examples include boron nitride (BN), carbon nitride (C 3 N 4 ), silicon nitride (Si 3 N 4 ), gallium nitride (GaN), indium nitride (InN), and aluminum nitride (AlN).
- BN boron nitride
- C 3 N 4 carbon nitride
- Si 3 N 4 silicon nitride
- GaN gallium nitride
- InN indium nitride
- AlN aluminum nitride
- the inorganic nitride preferably contains an aluminum atom, a boron atom, or a silicon atom, more preferably contains aluminum nitride, boron nitride, or silicon nitride, further preferably contains aluminum nitride or boron nitride, and boron nitride. Is particularly preferable. Only one kind of the above-mentioned inorganic nitride may be used, or two or more kinds may be used.
- the size of the inorganic substance is not particularly limited, but the average particle size of the inorganic substance is preferably 500 ⁇ m or less, more preferably 300 ⁇ m or less, still more preferably 200 ⁇ m or less, in that the dispersibility of the inorganic substance is more excellent.
- the lower limit is not particularly limited, but from the viewpoint of handleability, 10 nm or more is preferable, and 100 nm or more is more preferable.
- the catalog value is adopted when a commercially available product is used. If there is no catalog value, the average particle size is obtained by randomly selecting 100 inorganic substances using an electron microscope, measuring the particle size (major axis) of each inorganic substance, and arithmetically averaging them. ..
- the inorganic substance preferably contains at least one of an inorganic nitride and an inorganic oxide, and more preferably contains at least an inorganic nitride.
- the inorganic nitride preferably contains at least one of boron nitride and aluminum nitride, and more preferably contains at least boron nitride.
- the content of the inorganic nitride (preferably boron nitride) in the inorganic substance is preferably 10% by mass or more, more preferably 50% by mass or more, still more preferably 80% by mass or more, based on the total mass of the inorganic substance.
- the upper limit is 100% by mass or less.
- the inorganic oxide is preferably aluminum oxide.
- the composition more preferably contains at least an inorganic substance having an average particle size of 20 ⁇ m or more (preferably 40 ⁇ m or more).
- the content of the inorganic substance in the composition is 10% by mass or more, preferably 40% by mass or more, more preferably 50% by mass or more, still more preferably 60% by mass or more, based on the total solid content of the composition.
- the upper limit value is not particularly limited, but is preferably 95% by mass or less.
- Compound X is a functional group selected from the group consisting of an alkenyl group, an acrylate group, a methacrylate group, a silyl group, an acid anhydride group, a cyanate ester group, an amino group, a thiol group, and a carboxylic acid group (hereinafter, "specific functional group”). It is also a compound having one or more (also referred to as)) (compound X1), or a compound having a polyamic acid structure (compound X2). In the following, compound X1 and compound X2 will be described in detail.
- the number of the specific functional groups contained in the compound X1 is not particularly limited as long as it is 1 or more, but 2 or more is preferable. Further, the compound X1 may be a low molecular weight compound or a high molecular weight compound.
- the molecular weight of compound X1 is not particularly limited, and examples thereof include 50 to 100,000, preferably 100 to 100,000.
- the molecular weight is intended to have a weight average molecular weight, and is preferably 1,000 to 50,000.
- the alkenyl group is preferably linear or branched.
- the carbon number of the alkenyl group is not particularly limited, but is preferably 2 to 8.
- Examples of the alkenyl group include a vinyl group, an allyl group, a propenyl group, an isopropenyl group, a butenyl group, a hexenyl group, a cyclohexenyl group and the like, and a vinyl group or an allyl group is preferable, and a vinyl group is more preferable.
- the atomic group bonded to the vinyl group is preferably not -COO-.
- the silyl group is not particularly limited, but a hydrolyzable silyl group is preferable, and for example, a hydrolyzable silyl group represented by the following general formula (A) is more preferable.
- RA1 represents a substituted or unsubstituted monovalent hydrocarbon group.
- RA2 represents a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group.
- p represents an integer of 0 to 2.
- Substituted or unsubstituted monovalent hydrocarbon groups represented by RA1 and RA2 include, for example, alkyl groups, aryl groups, and aralkyl groups.
- the alkyl group may be linear, branched or cyclic. Examples of the number of carbon atoms of the alkyl group include 1 to 12, preferably 1 to 4, and more preferably 1 or 2.
- alkyl group examples include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, neopentyl group, hexyl group, heptyl group, octyl group, nonyl group and decyl.
- alkyl group examples include a group, a dodecyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group and the like.
- Examples of the number of carbon atoms of the aryl group include 6 to 12.
- the aryl group may be monocyclic or polycyclic. Examples of the aryl group include a phenyl group and a naphthyl group.
- the alkyl group In the aralkyl group, one of the hydrogen atoms of the alkyl group is substituted with an aryl group, and the alkyl group portion may be linear, branched chain, or cyclic.
- the preferred embodiment of the alkyl group moiety in the aralkyl group is the same as that of the alkyl group, and the preferred embodiment of the aryl group moiety is the same as that of the aryl group.
- Examples of the aralkyl group include a benzyl group, a phenylethyl group, a phenylpropyl group and the like.
- Monovalent hydrocarbon radical of a substituted or unsubstituted represented by R A1 and R A2 may have a substituent.
- substituents include the groups exemplified in the above-mentioned Substituent Group Y, and an alkyl group and a phenyl group are preferable.
- the acid anhydride group is not particularly limited, but one or two arbitrary hydrogen atoms from acid anhydrides such as maleic anhydride, phthalic anhydride, tetrahydrophthalic anhydride, pyromellitic anhydride, and trimellitic anhydride. Examples thereof include groups obtained by excluding (preferably one).
- the amino group may be either an unsubstituted amino group or a substituted amino group, and for example, an amino group represented by the following general formula (B) is preferable.
- RB1 represents a hydrogen atom or an alkyl group.
- R B1 is a hydrogen atom.
- the alkyl group may be linear, branched or cyclic. The number of carbon atoms of the alkyl group is, for example, 1 to 10, preferably 1 to 6, and more preferably 1 to 3.
- the alkyl group may further have a substituent (for example, a group exemplified by the substituent group Y).
- the compound X1 is a compound having one or more functional groups selected from the group consisting of an alkenyl group, an acrylate group, a methacrylate group, and a silyl group in that the obtained heat conductive material has more excellent thermal conductivity.
- the compound is a linear or branched organopolysiloxane and has two or more alkenyl groups bonded to a silicon atom.
- the weight average molecular weight of the linear or branched organopolysiloxane is not particularly limited, but is, for example, 1,000 to 50,000.
- a compound that is a linear or branched organopolysiloxane and has two or more alkenyl groups bonded to a silicon atom one or more selected from the group consisting of D units, T units, and Q units. It is preferable that it is an organopolysiloxane containing as a basic constituent unit, an organopolysiloxane containing at least one of D units and T units as a basic constituent unit is more preferable, and an organopolysiloxane represented by the following formula (C) is further preferable. preferable.
- RC each independently represents an unsubstituted or substituted hydrocarbon group containing no aliphatic unsaturated bond.
- X represents an alkenyl group.
- a represents a number from 0 to 2000.
- Examples of the hydrocarbon group represented by RC include an alkyl group, an aryl group, and an aralkyl group.
- the alkyl group may be linear, branched or cyclic.
- Examples of the number of carbon atoms of the alkyl group include 1 to 12, preferably 1 to 6.
- Examples of the alkyl group include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, tert-butyl group, pentyl group, neopentyl group, hexyl group, heptyl group, octyl group, nonyl group and decyl. Examples thereof include a group, a dodecyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group and the like.
- the aryl group may be monocyclic or polycyclic.
- Examples of the aryl group include a phenyl group, a tolyl group, a xylyl group, a naphthyl group, a biphenylyl group and the like.
- the alkyl group In the aralkyl group, one of the hydrogen atoms of the alkyl group is substituted with an aryl group, and the alkyl group portion may be linear, branched chain, or cyclic.
- the preferred embodiment of the alkyl group moiety in the aralkyl group is the same as that of the alkyl group, and the preferred embodiment of the aryl group moiety is the same as that of the aryl group.
- Examples of the aralkyl group include a benzyl group, a phenylethyl group, a phenylpropyl group, a methylbenzyl group and the like.
- the hydrocarbon group represented by RC may further have a substituent.
- substituents include the groups exemplified in the above-mentioned Substituent Group Y, and among them, a halogen atom or a cyano group is preferable.
- hydrocarbon group having a substituent include a chloromethyl group, a 2-bromoethyl group, a 3-chloropropyl group, a 3,3,3-trifluoropropyl group, a chlorophenyl group, a fluorophenyl group, a cyanoethyl group, and 3 , 3,4,4,5,5,6,6,6-nonafluorohexyl group.
- the number of carbon atoms such as methyl group, ethyl group, propyl group, chloromethyl group, bromoethyl group, 3,3,3-trifluoropropyl group and cyanoethyl group Preferred are 1 to 3 unsubstituted or substituted alkyl groups, or unsubstituted or substituted phenyl groups such as phenyl group, chlorophenyl group, and fluorophenyl group.
- an alkenyl group represented by X an alkenyl group having 2 to 8 carbon atoms such as a vinyl group, an allyl group, a propenyl group, an isopropenyl group, a butenyl group, a hexenyl group, and a cyclohexenyl group is preferable, and a vinyl group or an allyl group is used. Groups are more preferred, vinyl groups are even more preferred.
- the compound X1 may contain a plurality of specific functional groups in the molecule.
- compound X1 contains a plurality of specific functional groups in its molecule, it contains at least a functional group selected from the group consisting of an alkenyl group, an acrylate group, a methacrylate group, and a silyl group in that it has better thermal conductivity. Can be preferably used.
- compound X1 is not limited thereto.
- a commercially available product such as VF-600 manufactured by Shin-Etsu Chemical Co., Ltd. can be used.
- Compound X1 having a (meth) acrylate group as a specific functional group includes dipentaerythritol triacrylate (commercially available KAYARAD D-330; manufactured by Nippon Kayaku Co., Ltd.) and dipentaerythritol tetraacrylate (commercially available product).
- KAYARAD D-320 manufactured by Nippon Kayaku Co., Ltd., dipentaerythritol penta (meth) acrylate (commercially available KAYARAD D-310; manufactured by Nihon Kayaku Co., Ltd.), dipentaerythritol hexa (meth) acrylate ( Commercially available products include KAYARAD DPHA; manufactured by Nippon Kayaku Co., Ltd., NK ester A-DPH-12E; manufactured by Shin-Nakamura Chemical Industry Co., Ltd.), and these (meth) acryloyl groups contain ethylene glycol and / or propylene glycol residue.
- Examples thereof include structures bonded via a group (for example, SR454 and SR499 commercially available from Sartmer Co., Ltd.). These oligomer types can also be used. Further, as the compound X1 having a (meth) acrylate group as a specific functional group, KAYARAD RP-1040 and DPCA-20 (manufactured by Nippon Kayaku Co., Ltd.) can also be used.
- Examples of the compound X1 having a (meth) acrylate group as a specific functional group include trimethylolpropane tri (meth) acrylate, trimethylolpropane propyleneoxy-modified tri (meth) acrylate, and trimethylolpropane ethyleneoxy-modified tri (meth) acrylate.
- Trifunctional (meth) acrylate compounds such as isocyanurate ethyleneoxy-modified tri (meth) acrylate and pentaerythritol tri (meth) acrylate can also be used.
- trifunctional (meth) acrylate compounds include Aronix M-309, M-310, M-321, M-350, M-360, M-313, M-315, M-306, and M-305. , M-303, M-452, M-450 (manufactured by Toa Synthetic Co., Ltd.), NK ester A9300, A-GLY-9E, A-GLY-20E, A-TMM-3, A-TMM-3L, A -TMM-3LM-N, A-TMPT, TMPT (manufactured by Shin Nakamura Chemical Industry Co., Ltd.), KAYARAD GPO-303, TMPTA, THE-330, TPA-330, PET-30 (manufactured by Nippon Kayaku Co., Ltd.) And so on.
- Examples of the compound X1 having a silyl group as a specific functional group include tetramethoxysilane, tetraethoxysilane, tetran-propoxysilane, tetrai-propoxysilane, tetran-butoxysilane, tetrai-butoxysilane, and methyltrimethoxysilane.
- Compound X1 having an acid anhydride group as a specific functional group includes 3-methyl-1,2,3,6-tetrahydrophthalic anhydride, maleic anhydride, phthalic anhydride, pyromellitic anhydride, and trimellitic anhydride. Etc. can be used.
- Examples of the compound X1 having a cyanate ester group as a specific functional group include bisphenol A cyanate, polyphenol cyanate [oligo (3-methylene-1,5-phenylene cyanate)], and 4,4-methylenebis (2,6-dimethylphenyl cyanate).
- 4,4-Etilidene diphenyl disianate 4,4-Etilidene diphenyl disianate, hexafluorobisphenol A dicyanate, 2,2-bis (4-cyanate) phenylpropane, 1,1-bis (4-cyanate phenylmethane), bis (4-cyanate-3, Monofunctional or 2 such as 5-dimethylphenyl) methane, 1,3-bis [4-cyanatephenyl-1- (methylethylidene)] benzene, bis (4-cyanatephenyl) thioether and bis (4-cyanatephenyl) ether.
- Examples thereof include functional cyanate ester resins, novolak-type cyanate ester resins derived from phenol novolac, cresol novolak and the like, and prepolymers obtained by triazineing a part of these cyanate ester resins.
- functional cyanate ester resins for example, L-10, XU366, XU378, XU371 sold by Huntsman Japan Corporation, CYTESTER TA, CYTESTER NCN sold by Mitsubishi Gas Chemical Company, etc. can be used.
- Examples of the compound X1 having an amino group as a specific functional group include 4,4-diaminodiphenyl ether, 4,4-diaminodiphenylmethane, 3,3-diaminodiphenylmethane, 3,3-dichlorobenzidine, 4,4-diaminodiphenylsulfide, and 3 , 3-Diaminodiphenylsulphon, 1,5-diaminonaphthalene, m-phenylenediamine, p-phenylenediamine, 3,3-dimethyl-4,4-biphenyldiamine, benzidine, 3,3-dimethylbenzidine, 3,3- Examples thereof include dimethoxybenzidine, 4,4-diaminodiphenyl sulfone, 4,4-diaminodiphenyl sulfide, and 4,4-diaminodiphenyl propane.
- Compound X1 having a thiol group as a specific functional group includes 1,4-bis (3-mercaptobutyryloxy) butane, 3-mercaptophthalic acid di (1-mercaptoethyl), and diphthalate (2-mercaptopropyl).
- Examples of the compound X1 having a thiol group as a specific functional group include di (2-mercaptoisobutyl) phthalate, ethyleneglycolbis (2-mercaptoisobutyrate), propylene glycolbis (2-mercaptoisobutyrate), and diethyleneglycol.
- Examples of the compound X1 having a carboxylic acid group as a specific functional group include acrylic acid, methacrylic acid, etacrilic acid, fumaric acid, maleic acid, and maleic acid monoalkyl esters (maleic acid monomethyl ester, maleic acid monoethyl ester, etc.) and the like. Can be used.
- the compound X1 containing the specific functional group can react with the epoxy compound.
- the specific functional group is an acid anhydride group, a cyanate ester group, an amino group, a thiol group, or a carboxylic acid group
- the specific functional group content of the compound X1 is preferably 0.01 to 100 mmol / g, and 0. More preferably, 1 to 50 mmol / g.
- the specific functional group content is intended to be the number of specific functional groups possessed by 1 g of compound X1.
- the content of the epoxy compound in the composition and the above-mentioned compound X1 and optionally cured Ratio to the total content of the agent (for example, the phenolic compound described below) (the epoxy group of the epoxy compound reacts with the functional group capable of reacting with the epoxy group in the compound X1 and optionally with the epoxy group in the curing agent contained.
- the equivalent ratio with the possible functional groups is as described above.
- the compound X1 containing the specific functional group can cause a polymerization reaction.
- the compound X1 containing the specific functional group may or may cause a self-condensation reaction.
- Compound X2 is a compound having a polyamic acid structure.
- a compound having a polyamic acid structure is obtained by polymerizing an acid dianhydride and a diamine, and has a polymer structure (polyamic acid structure) containing a repeating unit having a -CO-NH- bond and a -COOH group.
- the acid dianhydride include pyromellitic dianhydride, 3,3,4,4-benzophenonetetracarboxylic dianhydride, 3,3,4,5-biphenyltetracarboxylic dianhydride, and 2,3.
- 3,4-biphenyltetracarboxylic dianhydride 2,3,6,7-naphthalenetetracarboxylic dianhydride, 1,2,5,6-naphthalenetetracarboxylic dianhydride, and 1,4 Examples thereof include aromatic tetracarboxylic dianhydrides such as 5,8-naphthalenetetracarboxylic dianhydride. In addition, you may use two or more kinds of these.
- Examples of the above diamines include 4,4-diaminodiphenyl ether, 4,4-diaminodiphenylmethane, 3,3-diaminodiphenylmethane, 3,3-dichlorobenzidine, 4,4-diaminodiphenylsulfide, and 3,3-diaminodiphenyl sulfone.
- 1,5-Diaminonaphthalene m-phenylenediamine, p-phenylenediamine, 3,3-dimethyl-4,4-biphenyldiamine, benzidine, 3,3-dimethylbenzidine, 3,3-dimethoxybenzidine, 4,4 Included are aromatic diamines such as -diaminodiphenylsulphon, 4,4-diaminodiphenylsulfide, and 4,4-diaminodiphenylpropane. In addition, you may use two or more kinds of these.
- the weight average molecular weight of compound X2 is not particularly limited, but is, for example, 1,000 to 300,000, preferably 3,000 to 100,000.
- the compound X is a compound having one or more functional groups selected from the group consisting of an alkenyl group, an acrylate group, a methacrylate group, and a silyl group in that the obtained heat conductive material has more excellent thermal conductivity.
- it is preferably a compound having a polyamic acid structure, and more preferably a linear or branched organopolysiloxane and a compound having two or more alkenyl groups bonded to a silicon atom.
- Compound X may be used alone or in combination of two or more.
- the content of compound X is 10% by mass or more, preferably 15% by mass or more, based on the total solid content of the composition.
- the upper limit is, for example, 50% by mass or less, preferably 40% by mass or less, and more preferably 35% by mass or less.
- the composition of the present invention also preferably contains a curing agent capable of reacting with the epoxy compound.
- phenol compounds and acid anhydrides are preferable.
- the phenol compound include phenol compounds described later.
- the acid anhydride include 3-methyl-1,2,3,6-tetrahydrophthalic anhydride, 4-methyl-1,2,3,6-tetrahydrophthalic anhydride, and 3-methyl-hexahydrophthalic anhydride. Acids, 4-methyl-hexahydrophthalic anhydride and the like can be mentioned.
- a phenol compound is more preferable because the heat conductive material has more excellent thermal conductivity.
- the acid anhydride also corresponds to compound X1.
- a compound having one or more acid anhydride groups of compound X1 may have a function as a curing agent.
- the composition of the present invention contains a compound having one or more acid anhydride groups as the compound X1, it is preferable to contain a phenol compound as a curing agent.
- the lower limit of the content of functional groups capable of reacting with the epoxy compound of the curing agent is preferably 3.0 mmol / g or more, and more preferably 12.0 mmol / g or more.
- the upper limit is preferably 25.0 mmol / g or less, more preferably 20.0 mmol / g or less.
- the functional group content is intended to be the number of functional groups contained in 1 g of the curing agent.
- the molecular weight of the curing agent is not particularly limited, but is preferably 600 or less.
- the lower limit is not particularly limited, but 110 or more is preferable.
- the curing agent one type may be used alone, or two or more types may be used.
- the content of the curing agent is preferably 1.0% by mass or more based on the total solid content of the composition.
- the upper limit is not particularly limited, but is preferably 25.0% by mass or less.
- the phenol compound is a compound having one or more phenolic hydroxyl groups (preferably two or more, more preferably three or more). From the viewpoint of better thermal conductivity, the phenol compound is one or more selected from the group consisting of the compound represented by the general formula (P1) and the compound represented by the general formula (P2). preferable.
- m1 represents an integer of 0 or more.
- the m1 is preferably 0 to 10, more preferably 0 to 3, still more preferably 0 or 1, and particularly preferably 1.
- na and nc each independently represent an integer of 1 or more. It is preferable that na and nc are independently 1 to 4, respectively.
- R 1 and R 6 independently represent a hydrogen atom, a halogen atom, a carboxylic acid group, a boronic acid group, an aldehyde group, an alkyl group, an alkoxy group, or an alkoxycarbonyl group.
- the alkyl group may be linear or branched.
- the alkyl group preferably has 1 to 10 carbon atoms.
- the alkyl group may or may not have a substituent.
- the alkyl group moiety in the alkoxy group and the alkyl group moiety in the alkoxycarbonyl group are the same as those in the alkyl group.
- R 1 and R 6 are preferably a hydrogen atom or a halogen atom, more preferably a hydrogen atom or a chlorine atom, and even more preferably a hydrogen atom.
- R 7 represents a hydrogen atom or a hydroxyl group. If R 7 there is a plurality, R 7 where there are a plurality, may each be the same or different. If R 7 there are a plurality of R 7 there are a plurality, also preferably at least one R 7 is a hydroxyl group.
- L x1 is a single bond, -C (R 2 ) (R 3 )-, -C (R 8 ) (R 9 ) -C (R 10 ) (R 11 )-, or-. Representing CO-, -C (R 2 ) (R 3 )-, -C (R 8 ) (R 9 ) -C (R 10 ) (R 11 )-, or -CO- is preferable.
- L x2 represents a single bond, -C (R 4 ) (R 5 )-, or -CO-, and -C (R 4 ) (R 5 )-or -CO- is preferable.
- R 2 ⁇ R 5 and R 8 ⁇ R 11 each independently represent a hydrogen atom or a substituent.
- the above-mentioned substituents are preferably hydroxyl groups, phenyl groups, halogen atoms, carboxylic acid groups, boronic acid groups, aldehyde groups, alkyl groups, alkoxy groups, or alkoxycarbonyl groups, respectively, and are preferably hydroxyl groups, halogen atoms, carboxylic acid groups, etc.
- a boronic acid group, an aldehyde group, an alkyl group, an alkoxy group, or an alkoxycarbonyl group is more preferable.
- the alkyl group may be linear or branched.
- the alkyl group preferably has 1 to 10 carbon atoms.
- the alkyl group may or may not have a substituent.
- the alkyl group moiety in the alkoxy group and the alkyl group moiety in the alkoxycarbonyl group are the same as those in the alkyl group.
- the phenyl group may or may not have a substituent, and when it has a substituent, it is more preferable to have 1 to 3 hydroxyl groups.
- R 2 to R 5 are preferably a hydrogen atom or a hydroxyl group, and more preferably a hydrogen atom.
- Each of R 8 to R 11 is preferably a hydrogen atom or a phenyl group independently. It is more preferable that the phenyl group has 1 to 3 hydroxyl groups.
- L x1 is preferably -CH 2- , -CH (OH)-, -CO-, -CH (Ph)-, -CCH 3 (CH 3 )-, or -CH (Ph) -CH (Ph)-. , -CH 2- , -CH (OH)-, -CO-, or -CH (Ph)-is more preferable.
- L x2 is preferably -CH 2- , -CH (OH)-, -CO-, or -CH (Ph)-.
- the Ph represents a phenyl group which may have a substituent.
- R 4 there are a plurality R 4 there are a plurality may each be the same or different. If R 5 there are a plurality, the plurality of R 5 may each be the same or different.
- Ar 1 and Ar 2 independently represent a benzene ring group or a naphthalene ring group, respectively.
- Ar 1 and Ar 2 are preferably benzene ring groups independently of each other.
- Q a represents a hydrogen atom, an alkyl group, a phenyl group, a halogen atom, a carboxylic acid group, a boronic acid group, aldehyde group, alkoxy group, or an alkoxycarbonyl group.
- the alkyl group may be linear or branched.
- the alkyl group preferably has 1 to 10 carbon atoms.
- the alkyl group may or may not have a substituent.
- the alkyl group moiety in the alkoxy group and the alkyl group moiety in the alkoxycarbonyl group are the same as those in the alkyl group.
- the phenyl group may or may not have a substituent.
- Q a is preferably bonded to the para position with respect to the hydroxyl group that the benzene ring group to which Q a is bonded may have.
- Q a is preferably a hydrogen atom or an alkyl group.
- the alkyl group is preferably a methyl group.
- the plurality of R 7 , L x 2 , and / or Q a may be the same or different. ..
- phenol compounds include, for example, benzene polyol such as benzenetriol, biphenylaralkyl type phenol resin, phenol novolac resin, cresol novolac resin, aromatic hydrocarbon formaldehyde resin modified phenol resin, dicyclopentadienephenol addition type resin, and phenol.
- Aralkyl resin polyhydric phenol novolac resin synthesized from polyhydric hydroxy compound and formaldehyde, naphthol aralkyl resin, trimethylolmethane resin, tetraphenylol ethane resin, naphthol novolac resin, naphthol phenol co-condensed novolac resin, naphthol cresol co-condensed Novolac resins, biphenyl-modified phenolic resins, biphenyl-modified naphthol resins, aminotriazine-modified phenolic resins, alkoxy group-containing aromatic ring-modified novolac resins and the like are also preferred.
- the lower limit of the hydroxyl group content of the phenol compound is preferably 3.0 mmol / g or more, and more preferably 12.0 mmol / g or more.
- the upper limit is preferably 25.0 mmol / g or less, more preferably 20.0 mmol / g or less.
- the hydroxyl group content is intended to be the number of hydroxyl groups (preferably phenolic hydroxyl groups) possessed by 1 g of the phenol compound.
- the phenol compound may have an active hydrogen-containing group (carboxylic acid group or the like) capable of polymerizing with the epoxy compound.
- the lower limit of the active hydrogen content of the phenol compound (total content of hydrogen atoms in hydroxyl groups, carboxylic acid groups, etc.) is preferably 3.0 mmol / g or more, and more preferably 7.0 mmol / g or more.
- the upper limit is preferably 25.0 mmol / g or less, more preferably 20.0 mmol / g or less.
- the content of the active hydrogen is intended to be the number of active hydrogen atoms contained in 1 g of the phenol compound.
- the upper limit of the molecular weight of the phenol compound is preferably 600 or less, more preferably 500 or less, and even more preferably 400 or less.
- the lower limit is preferably 110 or more, more preferably 250 or more, and even more preferably 300 or more.
- the phenol compound may be used alone or in combination of two or more.
- the content of the phenol compound is preferably 1.0% by mass or more, more preferably 3.0 to 25.0% by mass, based on the total solid content of the composition. , 5.0 to 20.0% by mass is more preferable.
- the ratio of the content of the epoxy compound to the content of the phenol compound in the composition is as described above.
- the composition of the present invention may further contain a surface modifier because the heat conductive material has better thermal conductivity.
- the surface modifier is a component that surface-modifies the above-mentioned inorganic substances.
- surface modification means a state in which an organic substance is adsorbed on at least a part of the surface of the inorganic substance. The form of adsorption is not particularly limited as long as it is in a bonded state. That is, the surface modification also includes a state in which an organic group obtained by desorbing a part of an organic substance is bonded to the surface of the inorganic substance.
- the bond may be any bond such as a covalent bond, a coordination bond, an ionic bond, a hydrogen bond, a van der Waals bond, and a metal bond.
- the surface modification may be made to form a monolayer on at least a part of the surface.
- the monolayer is a monolayer formed by chemical adsorption of organic molecules and is known as Self-Assembled MonoLayer (SAM).
- SAM Self-Assembled MonoLayer
- the surface modification may be only a part of the surface of an inorganic substance, or may be the whole.
- the "surface-modified inorganic substance” means an inorganic substance whose surface is modified by a surface modifier, that is, a substance in which an organic substance is adsorbed on the surface of the inorganic substance. That is, in the composition of the present invention, the inorganic substance may constitute a surface-modified inorganic substance (preferably a surface-modified inorganic nitride and / or a surface-modified inorganic oxide) in combination with the surface modifier.
- the surface modifier conventionally known surface modifiers such as carboxylic acids such as long-chain alkyl fatty acids, organic phosphonic acids, organic phosphoric acid esters, and organic silane molecules (silane coupling agents) can be used.
- carboxylic acids such as long-chain alkyl fatty acids, organic phosphonic acids, organic phosphoric acid esters, and organic silane molecules (silane coupling agents)
- silane molecules silane coupling agents
- the composition preferably when the inorganic substance contains an inorganic nitride (boron nitride and / or aluminum nitride, etc.) preferably contains a compound having a condensed ring skeleton or a triazine skeleton as a surface modifier.
- the surface modifier A is a surface modifier having a condensed ring skeleton.
- the surface modifier A satisfies the following conditions 1 and 2.
- -Condition 1 It has a functional group (hereinafter, also referred to as "specific functional group A") selected from the functional group group P shown below.
- ethynyl group For example, ethynyl group, propa-2-in-1-yl group, etc.), maleimide group, thiol group (-SH), hydroxyl group (-OH), halogen atom (F atom, Cl).
- a functional group selected from the group consisting of an atom, a Br atom, and an I atom), and an amino group.
- the acyl azide group is intended to be a group represented by the following structure. Note that * in the equation represents the coupling position.
- the counter anion (Z ⁇ ) of the acyl azide group is not particularly limited, and examples thereof include halogen ions.
- the succinate imide group, oxetanyl group, and maleimide group each represent a group formed by removing one hydrogen atom at an arbitrary position from the compound represented by the following formula.
- the onium group means a group having an onium salt structure.
- An onium salt is a compound produced by a compound having an electron pair that does not participate in a chemical bond, which is coordinated and bonded to another cationic compound by the electron pair.
- onium salts contain cations and anions.
- the onium salt structure is not particularly limited, but for example, an ammonium salt structure, a pyridinium salt structure, an imidazolium salt structure, a pyrrolidinium salt structure, a piperidinium salt structure, a triethylenediamine salt structure, a phosphonium salt structure, a sulfonium salt structure, and a thiopyrilium salt structure. And so on.
- the type of anion serving as a counter is not particularly limited, and a known anion is used.
- the valence of the anion is also not particularly limited, and examples thereof include 1 to 3 valences, preferably 1 to 2 valences.
- As the onium group a group having an ammonium salt structure represented by the following general formula (A1) is preferable.
- R 1A to R 3A independently represent a hydrogen atom or an alkyl group (including any of linear, branched chain and cyclic).
- the number of carbon atoms in the alkyl group is, for example, 1 to 10, preferably 1 to 6, and more preferably 1 to 3.
- M - represents an anion. * Represents the bond position.
- the alkyl group may further have a substituent (for example, a substituent group Y).
- the aryl halide group is not particularly limited as long as it is a group in which one or more halogen atoms are substituted in the aromatic ring group.
- the aromatic ring group may have either a monocyclic structure or a polycyclic structure, but a phenyl group is preferable.
- examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, and a fluorine atom is preferable.
- the aryl halide group may further have a substituent (for example, a substituent group Y).
- aryl halide group examples include a fluorophenyl group, a perfluorophenyl group, a chlorophenyl group, a bromophenyl group, and an iodophenyl group.
- R B include hydrogen atom or a monovalent organic group.
- any one or more of R B represents a monovalent organic group.
- the monovalent organic group include an alkyl group (including both linear, branched and cyclic groups) and an aryl group.
- the number of carbon atoms in the alkyl group is, for example, 1 to 10, preferably 1 to 6, and more preferably 1 to 3.
- the alkyl group may further have a substituent (for example, a substituent group Y).
- the aryl group is not particularly limited, and examples thereof include a phenyl group and a pyrenyl group.
- the alkyl halide group is not particularly limited, and examples thereof include a group in which one or more halogen atoms are substituted in an alkyl group having 1 to 10 carbon atoms.
- the alkyl group (including any of linear, branched and cyclic) has a carbon number of preferably 1 to 6, and more preferably 1 to 3.
- Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom, and a fluorine atom, a chlorine atom, or a bromine atom is preferable.
- the alkyl halide group may further have a substituent (for example, a substituent group Y).
- the RC include a hydrogen atom and an alkyl group (including any of linear, branched chain and cyclic). The number of carbon atoms in the alkyl group is, for example, 1 to 10, preferably 1 to 6, and more preferably 1 to 3.
- the alkyl group may further have a substituent (for example, a substituent group Y).
- the imide ester group may have an onium salt structure in which an electron pair that is not involved in the chemical bond of imine nitrogen is coordinated with another cation (for example, a hydrogen ion).
- the alkoxysilyl group is not particularly limited, and examples thereof include a group represented by the following general formula (A2).
- RD independently represents an alkyl group (including any of linear, branched chain and cyclic groups). * Represents the bond position.
- Examples of the alkyl group represented by RD include an alkyl group having 1 to 10 carbon atoms, preferably 1 to 6 carbon atoms, and more preferably 1 to 3 carbon atoms. Specific examples thereof include a trimethitoxysilyl group and a triethoxysilyl group.
- the alkyl group may further have a substituent (for example, a substituent group Y).
- the amino group is not particularly limited, and may be any of primary, secondary, and tertiary. Specific examples thereof include -N ( RE ) 2 ( RE is independently a hydrogen atom or an alkyl group (including both linear, branched chain and cyclic groups)). The number of carbon atoms in the alkyl group is, for example, 1 to 10, preferably 1 to 6, and more preferably 1 to 3.
- the alkyl group may further have a substituent (for example, a substituent group Y).
- the number of the specific functional groups A in the surface modifier A is not particularly limited as long as it is 1 or more.
- the upper limit thereof is not particularly limited, but is preferably 15 or less.
- 1 to 8 is preferable, 1 to 3 is more preferable, and 1 or 2 is further preferable, because the dispersibility of the surface-modified inorganic nitride is more excellent.
- -Condition 2 It has a condensed ring structure containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocycle.
- the aromatic hydrocarbon ring is not particularly limited, and examples thereof include a monocyclic aromatic hydrocarbon ring having 5 or more members.
- the upper limit of the number of ring members is not particularly limited, but in many cases, the number of members is 10 or less.
- a 5-membered or 6-membered monocyclic aromatic hydrocarbon ring is preferable.
- Examples of the aromatic hydrocarbon ring include a cyclopentadienyl ring and a benzene ring.
- the aromatic heterocycle is not particularly limited, and examples thereof include a monocyclic aromatic hydrocarbon ring having 5 or more members.
- the upper limit of the number of ring members is not particularly limited, but in many cases, the number of members is 10 or less.
- the aromatic heterocycle for example, a 5-membered or 6-membered monocyclic aromatic heterocycle is preferable.
- the aromatic heterocycle include a thiophene ring, a thiazole ring, an imidazole ring, a pyridine ring, a pyridazine ring, a pyrimidine ring, a pyrazine ring, and a triazine ring.
- the condensed structure is not particularly limited as long as it is a condensed ring structure containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocycle, but it is particularly superior in the effect of the present invention.
- a condensed ring structure containing two or more aromatic hydrocarbon rings is preferable, a condensed ring structure containing two or more benzene rings is more preferable, and a condensed ring structure containing three or more benzene rings is further preferable.
- the upper limit of the number of aromatic hydrocarbon rings and aromatic heterocycles contained in the condensed structure is not particularly limited, but is often 10 or less, for example.
- condensed ring structure containing two or more aromatic hydrocarbon rings include biphenylene, indacene, acenaphthylene, fluorene, phenalene, phenantrene, anthracene, fluorantene, acephenanthrylene, acetylene, pyrene, chrysen, and tetracene. , Pleiaden, Pyrene, Perylene, Pentafene, Pentacene, Tetraphenylene, Hexaphene, and Triphenylene.
- a condensed structure composed of condensed rings containing two or more rings is more preferable, a condensed structure composed of condensed rings containing three or more benzene rings is further preferable, and a condensed structure composed of pyrene or perylene is particularly preferable.
- the surface modifier A is preferably a compound represented by the general formula (V1), and more preferably a compound represented by the general formula (V2), in that the dispersibility is further improved.
- V1 a compound represented by the general formula (V1)
- V2 a compound represented by the general formula (V2)
- X represents an n-valent organic group having a condensed ring structure containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocycle.
- n is an integer of 1 or more.
- n is not particularly limited as long as it is an integer of 1 or more.
- the upper limit thereof is not particularly limited, but is preferably an integer of 15 or less.
- 1 to 8 is preferable, 1 to 3 is more preferable, and 1 or 2 is further preferable, because the dispersibility of the surface-modified inorganic nitride is more excellent.
- the condensed ring structure containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocycle in X the above-mentioned structure can be mentioned, and the preferred embodiment is also the same.
- the n-valent organic group represented by X is not particularly limited as long as it has a condensed ring structure containing two or more rings selected from the group consisting of aromatic hydrocarbon rings and aromatic heterocycles. In that the effect of the present invention is more excellent, it is preferable that the group is formed by extracting n hydrogen atoms from a fused ring containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocycle. ..
- the condensed structure may further have a substituent (for example, a substituent group Y) in addition to the specific functional group A.
- the Y is a monovalent group represented by the following general formula (B1), a monovalent group represented by the following general formula (B2), or a monovalent group represented by the following general formula (B4).
- B1 a monovalent group represented by the following general formula (B2)
- B4 a monovalent group represented by the following general formula (B4).
- n an integer of 2 or more
- B3 a divalent group represented by the following general formula (B3) in which a plurality of Ys are combined.
- the Y is a monovalent group represented by the following general formula (B1), a monovalent group represented by the following general formula (B2), or the following general formula.
- Y is a monovalent group represented by the following general formula (B1), a monovalent group represented by the following general formula (B2), or the following general formula. It represents a monovalent group represented by (B4), or a divalent group represented by the following general formula (B3) in which a plurality of Ys are bonded.
- n 2 or more, the plurality of Ys may be the same or different.
- Y represents a divalent group represented by the following general formula (B3)
- the compound represented by the general formula (V1) is represented by the following general formula (V3).
- X is synonymous with X in the general formula (V1) described above.
- L 3 has the same meaning as L 3 in the general formula (B3) to be described later.
- L 1 represents a single bond or a divalent linking group.
- the divalent linking group include, -O -, - S -, - NR F - (.
- the group formed by combining the above, for example, - (divalent hydrocarbon group) -X 111 -, - X 111 - (divalent hydrocarbon group) -, - (divalent hydrocarbon group) -X 111 - (divalent hydrocarbon group) -, - X 111 - (divalent hydrocarbon group) -X 111 - (divalent hydrocarbon group) -, or - (divalent hydrocarbon group) -X 111 - (Divalent hydrocarbon group) -X 111- and the like can be mentioned.
- -X 111- is -O-, -S-, -NR F- , a divalent organic group in the above-mentioned functional group group P, or a group in which these are combined.
- the total number of carbon atoms of the combined group is, for example, 1 to 20, preferably 1 to 12.
- the L 2 includes, for example, a divalent organic group in the above-mentioned functional group group P, or a divalent organic group in the above-mentioned functional group group P, and —O—, —S—, and ⁇ NR F ⁇ .
- RF represents a hydrogen atom or an alkyl group
- a group combining a linking group selected from the group consisting of-) and an arylene group can be mentioned. Examples of the combined group include- (divalent hydrocarbon group) -X 112- and the like.
- -X 112- is a divalent organic group in the above-mentioned functional group group P, or a divalent organic group in the above-mentioned functional group group P, and -O-, -S-, and -NR F. It is a group that is a combination of a divalent group selected from-.
- the total number of carbon atoms of the combined group is, for example, 1 to 20, preferably 1 to 12.
- the above P 2 represents a monovalent organic group.
- the monovalent organic group represented by P 2 is not particularly limited, and examples thereof include an alkyl group.
- the number of carbon atoms in the alkyl group is, for example, 1 to 10, preferably 1 to 6, and more preferably 1 to 3.
- * 2 represents the connection position with the above X.
- RF represents a hydrogen atom or an alkyl group
- a group combining a linking group selected from the group consisting of-) and an arylene group can be mentioned.
- -X 113- is a divalent organic group in the above-mentioned functional group group P, or a divalent organic group in the above-mentioned functional group group P, and -O-, -S-, and -NR F. It is a group that is a combination of a divalent group selected from-.
- the total number of carbon atoms of the combined group is, for example, 1 to 20, preferably 1 to 12.
- * 31 and * 32 represent the bonding position with the above X. That is, the L 3 forms a ring together with two different carbons in the condensed ring structure represented by the X.
- L 4 represents a linking group of m 11 + 1 valence.
- m 11 represents an integer of 2 or more.
- the upper limit of m 11 is not particularly limited, but is, for example, 100 or less, preferably 30 or less, more preferably 20 or less, and even more preferably 15 or less.
- the lower limit of m 11 is not particularly limited, but is preferably 4 or more.
- the linking group represented by L 4 is not particularly limited, and examples thereof include an m 11 + 1 valent aromatic hydrocarbon ring or a group represented by the following general formula (M1).
- X 221 and X 222 each independently represent a single bond or a divalent linking group.
- the divalent linking group represented by X 221 and X 222 is synonymous with the divalent linking group represented by L 1 in the above-mentioned general formula (B1).
- E 221 represents a substituent. Examples of the substituent represented by E 221 include the groups exemplified in the substituent group Y.
- m 221 represents an integer of 2 to 5. Of these, 2 or 3 is preferable as m 221.
- m222 represents an integer of 0 to 3. However, m 221 + m 222 represents an integer of 2 to 5.
- * 41 represents the connection position with the above X. * 42 represents the bonding position to the P 4.
- the group represented by the general formula (M1) is preferably the group represented by the following general formula (M2).
- X223 , X224 , and X225 each independently represent a single bond or a divalent linking group.
- the divalent linking group represented by X 223 , X 224 , and X 225 is synonymous with the divalent linking group represented by L 1 in the above general formula (B1).
- E 222 and E 223 each independently represent a substituent. Examples of the substituent represented by E 222 and E 223 include the groups exemplified in the substituent group Y.
- m 223 represents an integer from 1 to 5. Of these, 2 or 3 is preferable as m 223.
- m 224 represents an integer of 0 to 3.
- m 225 represents an integer of 0 to 4.
- m 226 represents an integer of 2 to 5.
- m 226, among others 2 or 3 are preferred. However, m 224 + m 226 represents an integer of 2 to 5. Further, m 223 + m 225 represents an integer of 1 to 5. * 41 represents the connection position with the above X. * 42 represents the bonding position to the P 4.
- X 11 represents an n 11 + n 12- valent organic group having a condensed ring structure containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocycle.
- the above X 11 represents an n 11 + n 12- valent organic group (n 11 and n 12 are each independently an integer of 1 or more).
- n 11 and n 12 are not particularly limited as long as they are independently integers of 1 or more.
- the upper limit of n 11 + n 12 is not particularly limited, but is preferably an integer of 15 or less. Among them, 2 to 8 is preferable, 2 to 3 is more preferable, and 2 is further preferable, because it is more excellent in dispersibility of the surface-modified inorganic substance.
- the condensed ring structure containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and aromatic heterocyclic ring in the above X 11, include the above-mentioned structure, also preferred embodiments are also the same.
- n 11 + n 12- valent organic group represented by X 11 is particularly limited as long as it has a condensed ring structure containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocycle. However, in that the effect of the present invention is more excellent, it is formed by extracting n 11 + n 12 hydrogen atoms from a fused ring containing two or more rings selected from the group consisting of aromatic hydrocarbon rings and aromatic heterocycles. It is preferably a group.
- the condensed structure may further have a substituent (for example, a substituent group Y) in addition to Y 11 and Y 12.
- the Y 11 contains a functional group selected from the following functional group group Q.
- the functional groups listed in the functional group group Q below correspond to the groups listed in the functional group group P described above, which tend to have excellent adsorptivity to inorganic substances (particularly inorganic nitrides).
- the Y 12 contains a functional group selected from the following functional group group R.
- the functional groups listed in the functional group group R below correspond to the groups having a function of easily accelerating the curing of the composition among the functional groups listed in the functional group group P described above.
- the above Y 11 specifically represents a monovalent group represented by the following general formula (C1) or a monovalent group represented by the following general formula (C2), or
- n 11 represents an integer of 2 or more, it represents a divalent group represented by the following general formula (C3) in which a plurality of Y 11s are combined.
- the Y 11 represents a monovalent group represented by the following general formula (C1) or a monovalent group represented by the following general formula (C2).
- n 11 represents an integer of 2 or more, does the above Y 11 represent a monovalent group represented by the following general formula (C1) or a monovalent group represented by the following general formula (C2)? , Or a divalent group represented by the following general formula (C3) in which a plurality of Y 11s are bonded.
- the plurality of Y 11s may be the same or different.
- X 11 , Y 12 , and n 12 are synonymous with X 11 , Y 12 , and n 12 in the general formula (V2) described above.
- M 3 has the same meaning as M 3 in the general formula (C3) to be described later.
- M 1 represents a single bond or a divalent linking group.
- the divalent linking group represented by M 1 has the same meaning as L 1 described above, and the preferred embodiment is also the same.
- acid anhydride groups including monovalent acid anhydride groups such as maleic anhydride, phthalic anhydride, pyromellitic anhydride, and trimellitic anhydride
- phosphonic acid groups (-PO (OH).
- the Y 12 represents a monovalent group represented by the following general formula (D1) or a monovalent group represented by the following general formula (D2).
- W 1 represents a single bond or a divalent linking group.
- R 1 represents a carboxylic acid group, an alkoxysilyl group, an acrylic group, a methacryl group, an oxetanyl group, a vinyl group, an alkynyl group, a maleimide group, a thiol group, a hydroxyl group, or an amino group.
- * 1 represents the connection position with the above X 11.
- the above R 1 represents the functional groups listed in the above-mentioned functional group group R.
- the divalent linking group represented by W 1 has the same meaning as L 1 described above, and the preferred embodiment is also the same.
- * 1 represents the connection position with the above X 11.
- W 2 represents a linking group of m 21 + 1 valence.
- m 21 represents an integer of 2 or more.
- the upper limit of m 21 is not particularly limited, but is, for example, 100 or less, preferably 30 or less, more preferably 20 or less, and even more preferably 15 or less.
- the lower limit of m 21 is not particularly limited, but is preferably 4 or more.
- R 2 represents a carboxylic acid group, an alkoxysilyl group, an acrylic group, a methacryl group, an oxetanyl group, a vinyl group, an alkynyl group, a maleimide group, a thiol group, a hydroxyl group, or an amino group.
- the R 2 represents the functional groups listed in the functional group group R described above.
- the m 21 + 1 valent linking group represented by W 2 has the same meaning as L 4 described above, and the preferred embodiment is also the same. * 2 represents the connection position with the above X 11.
- the molecular weight of the surface modifier A is, for example, 150 or more, preferably 200 or more in that it is more excellent in dispersibility of the surface-modified inorganic nitride, and preferably 2,000 or less from the viewpoint of solubility. More preferably, it is 000 or less.
- the surface modifier is preferably the surface modifier B described below.
- the surface modifier B is a compound represented by the following general formula (W1).
- X represents a benzene ring group or a heterocyclic group which may have a substituent. That is, X represents a benzene ring group which may have a substituent or a heterocyclic group which may have a substituent.
- the heterocyclic group is not particularly limited, and examples thereof include an aliphatic heterocyclic group and an aromatic heterocyclic group. Examples of the aliphatic heterocyclic group include a 5-membered ring group, a 6-membered ring group, a 7-membered ring group, and a condensed ring group thereof.
- Examples of the aromatic heterocyclic group include a 5-membered ring group, a 6-membered ring group, a 7-membered ring group, and a condensed ring group thereof.
- the condensed ring group may contain a ring group other than the heterocyclic group such as a benzene ring group.
- Specific examples of the above-mentioned aliphatic heterocyclic group are not particularly limited, and examples thereof include an oxolane ring group, an oxane ring group, a piperidine ring group, and a piperazine ring group.
- hetero atom contained in the aromatic heterocyclic group examples include a nitrogen atom, an oxygen atom, and a sulfur atom.
- the number of carbon atoms of the aromatic heterocyclic group is not particularly limited, but is preferably 3 to 20.
- Specific examples of the aromatic heterocyclic group are not particularly limited, but are furan ring group, thiophene ring group, pyrrole ring group, oxazole ring group, isooxazole ring group, oxazole ring group, thiazole ring group, and isothiazole ring.
- thiazazole ring group imidazole ring group, pyrazole ring group, triazole ring group, frazane ring group, tetrazole ring group, pyridine ring group, pyridazine ring group, pyrimidine ring group, pyrazine ring group, triazine ring group, tetrazine ring group, Benzofuran ring group, isobenzofuran ring group, benzothiophene ring group, indole ring group, indolin ring group, isoindole ring group, benzoxazole ring group, benzothiazole ring group, indazole ring group, benzoimidazole ring group, quinoline ring group, Isoquinoline ring group, cinnoline ring group, phthalazine ring group, quinazoline ring group, quinoxaline ring group, dibenzofuran ring group, di
- the heterocyclic group represented by X is preferably an aromatic heterocyclic group.
- X is preferably a benzene ring group or a triazine ring group, and more preferably a triazine ring group.
- the substituent preferably contains a specific functional group B described later.
- W1 In the general formula (W1), n represents an integer of 3 to 6, and n groups represented by [-(L 1 ) m- Z] are bonded to X.
- the group represented by [-(L 1 ) m- Z] is a group that directly binds to X.
- R N represents a hydrogen atom or a carbon atoms which may have a substituent 1-10 organic group.
- L number of carbon atoms of the arylene group represented by 1 is preferably 6 to 20, more preferably 6 to 10, 6 is more preferable.
- the arylene group is preferably a phenylene group.
- the arylene group is a phenylene group, there are no particular restrictions on the position at which it is bonded to an adjacent group (including the case where two groups of X, L 1 , and Z are both L 1). However, they may be bonded at any of the ortho-position, meta-position, and para-position, and are preferably bonded at the para-position.
- the arylene group may or may not have a substituent, and preferably does not have it.
- the substituent When the arylene group has a substituent, the substituent preferably contains a specific functional group B described later.
- L 1 is an ester group, the carbon atom in the ester group is preferably present on the X side.
- L 1 is a thioester group, the sulfur atom in the thioester group is preferably present on the X side.
- the unsaturated hydrocarbon group represented by L 1 may be linear or branched, and may have a cyclic structure.
- the unsaturated hydrocarbon group preferably has 2 to 10 carbon atoms, more preferably 2 to 5 carbon atoms, further preferably 2 to 3 carbon atoms, and particularly preferably 2 carbon atoms.
- the number of carbon atoms does not include the number of carbon atoms contained in the substituents that the unsaturated hydrocarbon group can have.
- the unsaturated hydrocarbon group may or may not have a substituent, and preferably does not have it.
- the substituent preferably contains a specific functional group B.
- L 1 -NR N represented by - the R N is, when an organic group which has ⁇ 1 carbon atoms which may 10 have a substituent, R N is the number of carbon atoms which may have a substituent It is preferably an alkyl group having 1 to 10 alkyl groups, preferably an alkyl group having 1 to 5 carbon atoms which may have a substituent, and an alkyl having 1 to 3 carbon atoms which may have a substituent. It is preferably a group.
- the alkyl group may be linear or branched, and may have a cyclic structure.
- R N is preferably a hydrogen atom.
- n represents an integer of 0 or more.
- m an integer of 0 to 10
- an integer of 0 to 5 is more preferable
- an integer of 0 to 2 is further preferable
- an integer of 1 to 2 is particularly preferable.
- Z binds directly to X.
- L 1 has an arylene group, an ester group, an ether group, a thioester group, a thioether group, a carbonyl group, -NR N- , an azo group, or a substituent which may have a substituent.
- an unsaturated hydrocarbon group which may have a substituent is an arylene group which may have a substituent, an ester group, an ether group, a carbonyl group, or an unsaturated hydrocarbon group which may have a substituent.
- an unsaturated hydrocarbon group which may have an ester group, an ether group, a carbonyl group, or a substituent is further preferable.
- [-(L 1 ) m- Z] is [-L 1- L 1- Z]
- L 1 bonded to X is an arylene group which may have a substituent. Is preferable.
- L 1 bonded to Z is an unsaturated hydrocarbon group which may have an ester group, an ether group, a thioester group, a thioether group, a carbonyl group, -NR N- , an azo group, or a substituent. Is preferable, and an unsaturated hydrocarbon group which may have an ester group or a substituent is more preferable. If m is greater than 2, - L 1 of [(L 1) m -Z] a plurality present in the may be the same or different, preferably are different L 1 mutually bonded together.
- -(L 1 ) m- in the general formula (W1) is preferably a group represented by the general formula (Lq).
- - the group represented by [(L 1) m -Z] is - is preferably [L a -Z] a group represented by.
- Z represents an aryl group or a heterocyclic group which may have a substituent. That is, Z represents an aryl group which may have a substituent or a heterocyclic group which may have a substituent.
- the aryl group represented by Z preferably has 6 to 20 carbon atoms, more preferably 6 to 14 carbon atoms, and even more preferably 6. Examples of the aryl group include a phenyl group, a naphthyl group, an anthracenyl group and the like.
- Examples of the heterocyclic group represented by Z include the heterocyclic group in which X can be described above. Further, the heterocyclic group represented by Z preferably exhibits aromaticity.
- Z is preferably an aryl group, more preferably a phenyl group or an anthrasenyl group, and even more preferably a phenyl group.
- Z preferably has a substituent, and more preferably the above-mentioned substituent contains a specific functional group B described later.
- the number of substituents contained in one Z is preferably 0 to 5, more preferably 0 to 2, and even more preferably 1 to 2. It is preferable that at least one of the plurality of Zs has a substituent containing the specific functional group B.
- the surface modifier B preferably has one or more specific functional groups B contained in a plurality of Z substituents, more preferably two or more, and further preferably three or more.
- the upper limit of the total number of the specific functional groups B contained in the plurality of Z substituents contained in the surface modifier B is not particularly limited, but is preferably 15 or less, more preferably 10 or less, still more preferably 8 or less.
- n represents an integer of 3 to 6.
- Each group of the plurality of [-(L 1 ) m- Z] may be the same or different. That is, in the general formula (W1), is m the presence of a plurality may be the same or different, L 1 that there are a plurality in the case where L 1 there are a plurality may be the same or different, the Z presence of a plurality of identical But it can be different. It is also preferable that a plurality of m's are the same. Further, it is preferable that a plurality of ms each represent an integer of 1 or more, and it is also preferable that all of them represent an integer of 2 or more.
- a plurality of [-(L 1 ) m- Z] have the same configuration except for the substituents of Z, and it is also preferable that all the configurations including the substituents of Z are the same. .. n is preferably 3 or 6. If there is a group in [-(L 1 ) m- Z] that can be either (L 1 ) m or Z, the group is assumed to be (L 1 ) m . For example, when [-(L 1 ) m- Z] is [-benzene ring group-benzene ring group-halogen atom], the benzene ring group on the left side is (L 1 ) m , not Z.
- the surface modifier B represented by the general formula (W1) preferably has four or more benzene ring groups.
- the surface modifier B preferably has a triphenylbenzene structure.
- the surface modifier B represented by the general formula (W1) has a total of four or more benzene ring groups and triazine ring groups. In this case, for example, it is preferable that X is a triazine ring group.
- the surface modifier B preferably has one or more specific functional groups B, and more preferably two or more.
- the specific functional group B includes a boronic acid group, an aldehyde group, a hydroxyl group, a carboxylic acid group, an isocyanate group, an isothiocyanate group, a cyanate group, an acyl azide group, a succinate imide group, a sulfonyl chloride group, a carboxylic acid chloride group and an onium group.
- a hydroxyl group, an amino group, an acid anhydride group, a thiol group, a carboxylic acid group, an acryloyl group, a methacryloyl group, or a vinyl group is preferable.
- the hydroxyl group is intended to be a group in which a ⁇ OH group is directly bonded to a carbon atom.
- the -OH group existing in the form contained in the carboxylic acid group (-COOH) is not a hydroxyl group.
- the alkoxycarbonyl group is not particularly limited as long as it is a group represented by —CO—OR f.
- the R f represents an alkyl group (including any of linear, branched chain, and cyclic groups).
- the number of carbon atoms of the alkyl group represented by R f is, for example, 1 to 10, preferably 1 to 6, and more preferably 1 to 3.
- the specific functional groups B the functional groups that overlap with the specific functional group A are as described for the specific functional group A.
- the plurality of specific functional groups B may be the same or different.
- the position where the specific functional group B is present is not particularly limited.
- the specific functional group B may be contained in the substituent of X in the general formula (W1), and is an arylene group or an unsaturated hydrocarbon group. If may be included in substituents L 1 of, it may be included in substituents Z.
- the specific functional group B may be bonded to a group other than the specific functional group B to form one substituent. Further, a plurality of specific functional groups B may be contained in one substituent.
- a group represented by the general formula (Rx), a group represented by the general formula (Ry), or a group represented by the general formula (Rz) is preferable.
- Lx 1 represents a single bond or a divalent linking group.
- the divalent linking group is not particularly limited, but for example, any one or a combination of two or more selected from the group consisting of -O-, -CO-, -NH-, and divalent hydrocarbon groups 2 Represents a valence linking group.
- the divalent hydrocarbon group may further have a substituent (for example, the group exemplified in the substituent group Y).
- the alkylene group may be linear, branched or cyclic, but linear is preferable.
- the carbon number thereof is preferably 1 to 10, more preferably 1 to 6, and even more preferably 1 to 4.
- Lx 1 includes single bond, -AL-, -O-, -O-CO-, -O-AL-, -AL-CO-, -O-AL-O-, -O-CO-AL-, -CO-O-AL-, -AL-NH-CO-, -O-AL-O-AL-, -CO-O-AL-O-, or -O-AL-O-Ar- are preferable.
- the AL represents an alkylene group having 1 to 10 carbon atoms (preferably 1 to 6 carbon atoms, more preferably 1 to 4 carbon atoms).
- the Ar represents an arylene group having 6 to 20 carbon atoms (preferably a phenylene group).
- Lx 1 is "-O-AL-O-Ar-"
- Ar in "-O-AL-O-Ar-” is combined with Qx.
- Qx represents a monovalent specific functional group B.
- phosphinic acid group phosphate group, sulfonic acid group, phosphate ester group, halogen atom, acid anhydride group, alkyl halide group, nitrile group, nitro group, alkoxycarbonyl group, alkoxysilyl group, acryloyl group, methacryloyl
- halogen atom acid anhydride group, alkyl halide group, nitrile group, nitro group, alkoxycarbonyl group, alkoxysilyl group, acryloyl group, methacryloyl
- examples thereof include a group, an oxetanyl group, a vinyl group, an alkynyl group, a maleimide group, a thiol group, an amino group, an epoxy group, and a silyl group.
- Ly 1 represents a divalent linking group containing a carbodiimide group, a carbonate group, or an imide ester group.
- the divalent linking group represented by Ly 1 may contain a carbodiimide group, a carbonate group, or an imide ester group, and may be combined with another linking group. Examples of other linking groups include an alkylene group.
- Ly 1 may be a-alkylene group-Ly 3 -alkylene group.
- Ly 3 represents a carbodiimide group, a carbonate group, or an imide ester group.
- the Qy represents a monovalent organic group.
- the monovalent organic group represented by Qy is not particularly limited, and examples thereof include an alkyl group.
- the number of carbon atoms in the alkyl group is, for example, 1 to 10, preferably 1 to 6, and more preferably 1 to 3.
- s represents an integer of 2 to 3. s is preferably 2.
- Lz 1 represents a group that can be represented by Lx 1 , and the preferred conditions are the same.
- Lz 2 existing in plural numbers, each independently represent a single bond or a divalent linking group.
- the divalent linking group is not particularly limited, and for example, any one or more selected from the group consisting of -O-, -CO-, -NH-, and a divalent hydrocarbon group are combined. Represents a divalent linking group.
- the divalent hydrocarbon group may further have a substituent (for example, the group exemplified in the substituent group Y).
- the alkylene group may be linear, branched or cyclic, but linear is preferable.
- the carbon number thereof is preferably 1 to 10, more preferably 1 to 6, and even more preferably 1 to 4.
- Lz 2 includes single bond, -AL-, -O-, -O-CO-, -O-AL-, -AL-CO-, -O-AL-O-, -O-CO-AL-, -CO-O-AL-, -AL-NH-CO-, -O-AL-O-AL-, -CO-O-AL-O-, -O-AL-O-Ar-, or -O- Ar- is preferable.
- the AL represents an alkylene group having 1 to 10 carbon atoms (preferably 1 to 6 carbon atoms, more preferably 1 to 4 carbon atoms).
- the Ar represents an arylene group having 6 to 20 carbon atoms (preferably a phenylene group).
- Sz represents a linking group of (s + 1) valence.
- an aromatic ring group having a (s + 1) valence is preferable.
- the aromatic ring group may be an aromatic hydrocarbon ring group or an aromatic heterocyclic group, and a benzene ring group or a triazine ring group is preferable.
- Qz represents a monovalent specific functional group B.
- the plurality of Qz each independently represents a group that can be represented by the above Qx, and the preferred conditions are the same.
- the surface modifier B is preferably a compound represented by the following general formula (W2).
- La and Z are as described above.
- a plurality of L a can be the same or different.
- the plurality of Zs may be the same or different.
- R a represents a hydrogen atom, a monovalent specific functional groups B, or -L a -Z.
- L a In the general formula (W3), the definition of L a are as described above. A plurality of L a can be the same or different.
- Ar independently represents an aryl group. Preferable embodiments of the aryl group include an aryl group represented by Z.
- R b each independently represents a substituent containing a specific functional group B. The definition of the specific functional group B is as described above. Further, as the substituent containing the specific functional group B, a group represented by the general formula (Rx), a group represented by the general formula (Ry), or a group represented by the general formula (Rz) is preferable.
- p represents an integer of 0 to 5 independently of each other. The p is preferably 0 to 2. Among the three ps in the general formula (W3), the mode 1 in which two ps are 0 and one p is 1 or the mode 2 in which all three ps are 1 is preferable.
- R c is a hydrogen atom, a monovalent specific functional groups B, or -L a -Ar- (R b) p .
- L a, Ar, of R b and p definitions are as described above.
- the molecular weight of the surface modifier B is preferably 300 or more, more preferably 350 or more, from the viewpoint of being more excellent in the dispersibility of the surface-modified inorganic nitride.
- the molecular weight of the surface modifier B is preferably 3000 or less, more preferably 2000 or less, from the viewpoint of excellent solubility.
- the surface modifier B can be synthesized according to a known method.
- the composition contains an organic silane molecule (preferably a compound having an alkoxysilyl group) as a surface modifier (preferably when the inorganic substance contains an inorganic oxide (aluminum oxide or the like)).
- organic silane molecule include surface modifier A, surface modifier B, and other surface modifiers that do not fall under any of these.
- organic silane molecule that is the other surface modifier include 3-aminopropyltriethoxysilane, 3- (2-aminoethyl) aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, and 3- (2).
- the surface modifier may be used alone or in combination of two or more.
- the mass ratio of the content of the surface modifier to the content of the inorganic substance is preferably 0.0001 to 10. 0001 to 5 are more preferable.
- the mass ratio of the total contents of the surface modifier A and the surface modifier B to the content of the inorganic nitride preferably boron nitride and / or aluminum nitride
- the content / content of the inorganic nitride is preferably 0.0001 to 10, more preferably 0.0001 to 5.
- Mass ratio of the content of organic silane molecules as surface modifiers preferably organic silane molecules, which are other surface modifiers
- the content of inorganic oxides preferably aluminum oxide
- the content of the inorganic oxide is preferably 0.0001 to 10, more preferably 0.001 to 5.
- the composition of the present invention may further contain a curing accelerator.
- the type of curing accelerator is not limited, and for example, triphenylphosphine, 2-ethyl-4-methylimidazole, boron trifluoride amine complex, 1-benzyl-2-methylimidazole, and JP2012-67225A. Examples include the compounds described in paragraph 0052.
- the curing accelerator may be used alone or in combination of two or more.
- the mass ratio of the content of the curing accelerator to the content of the epoxy compound is preferably 0.0001 to 10. More preferably 0.001 to 5.
- the composition of the present invention may contain a polymerization initiator.
- a polymerization initiator when the composition of the present invention contains a compound X1 containing a specific functional group selected from the group consisting of an alkenyl group, an acrylate group, and a methacrylate group, the composition of the present invention may contain a polymerization initiator.
- the polymerization initiator is not particularly limited, and a known polymerization initiator can be used. Examples of the polymerization initiator include a photopolymerization initiator and a thermal polymerization initiator, and a photopolymerization initiator is preferable.
- a so-called radical polymerization initiator is preferable.
- the content of the polymerization initiator in the composition is not particularly limited, but is preferably 0.5 to 15% by mass with respect to the content of compound X. It is more preferably 0.0 to 10% by mass, further preferably 1.5 to 8.0% by mass.
- the polymerization initiator one type may be used alone, or two or more types may be used in combination. When two or more kinds of polymerization initiators are used in combination, the total content is preferably within the above range.
- composition of the present invention may further contain a dispersant.
- a dispersant When the composition contains a dispersant, the dispersibility of the inorganic substance in the composition is improved, and more excellent thermal conductivity and adhesiveness can be realized.
- the dispersant can be appropriately selected from commonly used dispersants.
- DISPERBYK-106 manufactured by BYK-Chemie GmbH
- DISPERBYK-111 manufactured by BYK-Chemie GmbH
- ED-113 manufactured by Kusumoto Kasei Co., Ltd.
- Ajisper PN-411 manufactured by Ajinomoto Fine-Techno
- REB122-4 manufactured by Hitachi Kasei Kogyo
- the dispersant may be used alone or in combination of two or more.
- the mass ratio of the dispersant content to the inorganic content is preferably 0.0001 to 10, preferably 0.001 to 5. Is more preferable.
- the composition of the present invention may further contain a solvent.
- the type of solvent is not particularly limited, and an organic solvent is preferable.
- the organic solvent include cyclopentanone, cyclohexanone, ethyl acetate, methyl ethyl ketone, dichloromethane, tetrahydrofuran and the like.
- the content of the solvent is preferably such that the solid content concentration of the composition is 20 to 90% by mass, more preferably 30 to 80% by mass, and 40 to 80% by mass. Is more preferable.
- the method for producing the composition is not particularly limited, and a known method can be adopted.
- the above-mentioned various components can be mixed and produced.
- various components may be mixed all at once or sequentially.
- the method for mixing the components is not particularly limited, and a known method can be used.
- the mixing device used for mixing is preferably a liquid disperser, for example, a stirrer such as a rotating revolution mixer or a high-speed rotary shear type stirrer, a colloid mill, a roll mill, a high-pressure injection disperser, an ultrasonic disperser, a bead mill, And a homogenizer.
- the mixing device may be used alone or in combination of two or more. Degassing may be performed before, after, and / or at the same time as mixing.
- the composition of the present invention is cured to obtain the heat conductive material of the present invention.
- the curing method of the composition is not particularly limited, but a thermosetting reaction is preferable.
- the heating temperature during the thermosetting reaction is not particularly limited. For example, it may be appropriately selected in the range of 50 to 250 ° C. Further, when the thermosetting reaction is carried out, heat treatments having different temperatures may be carried out a plurality of times.
- the curing treatment is preferably performed on a film-like or sheet-like composition. Specifically, for example, the composition may be applied to form a film and a curing reaction may be carried out. When performing the curing treatment, it is preferable to apply the composition on the substrate to form a coating film and then cure.
- a different base material may be brought into contact with the coating film formed on the base material, and then the curing treatment may be performed.
- the cured product (heat conductive material) obtained after curing may or may not be separated from one or both of the substrates.
- the composition may be applied on different substrates to form coating films, and the curing treatment may be performed in a state where the obtained coating films are in contact with each other.
- the cured product (heat conductive material) obtained after curing may or may not be separated from one or both of the substrates.
- press working may be performed.
- the press used for press working is not limited, and for example, a flat plate press or a roll press may be used.
- a base material with a coating film obtained by forming a coating film on a base material is sandwiched between a pair of rolls in which two rolls face each other, and the above pair of rolls is used. It is preferable to apply pressure in the film thickness direction of the coating film-coated substrate while rotating the coating film-coated substrate.
- the base material may be present on only one side of the coating film, or the base material may be present on both sides of the coating film.
- the base material with a coating film may be passed through the roll press only once or may be passed a plurality of times. Only one of the treatment by the flat plate press and the treatment by the roll press may be carried out, or both may be carried out.
- the curing treatment may be completed when the composition is in a semi-cured state.
- the heat conductive material of the present invention in a semi-cured state may be arranged so as to be in contact with the device or the like to be used, and then further cured by heating or the like to be finally cured. It is also preferable that the device and the heat conductive material of the present invention are adhered to each other by heating or the like during the main curing.
- the heat conductive material including the curing reaction refer to "Highly heat conductive composite material" (CMC Publishing, by Yutaka Takezawa).
- the shape of the heat conductive material is not particularly limited, and can be molded into various shapes depending on the application.
- a typical shape of the molded heat conductive material is, for example, a sheet shape. That is, the heat conductive material of the present invention is preferably a heat conductive sheet. Further, the thermal conductivity of the heat conductive material of the present invention is preferably isotropic rather than anisotropic.
- the heat conductive material is preferably insulating (electrically insulating).
- the composition of the present invention is preferably a thermally conductive insulating composition.
- the volume resistivity of the heat conductive material at 23 ° C. and 65% relative humidity is preferably 10 10 ⁇ ⁇ cm or more, more preferably 10 12 ⁇ ⁇ cm or more, further preferably 10 14 ⁇ ⁇ cm or more, and 10 16 ⁇ . -Cm or more is particularly preferable.
- the upper limit is not particularly limited, but is usually 10 18 ⁇ ⁇ cm or less.
- the heat conductive material of the present invention can be used as a heat radiating material such as a heat radiating sheet, and can be used for heat radiating various devices. More specifically, a device with a heat conductive layer can be produced by arranging a heat conductive layer containing the heat conductive material of the present invention on the device, and heat generated from the device can be efficiently dissipated by the heat conductive layer. Since the heat conductive material of the present invention has sufficient heat conductivity and high heat resistance, it dissipates heat from power semiconductor devices used in various electric devices such as personal computers, general household appliances, and automobiles. Suitable for applications.
- the heat conductive material of the present invention has sufficient heat conductivity even in a semi-cured state, it is difficult to reach the part where light for photocuring is difficult to reach, such as a gap between members of various devices. It can also be used as a heat radiating material to be placed. In addition, since it has excellent adhesiveness, it can be used as an adhesive having thermal conductivity.
- the heat conductive material of the present invention may be used in combination with other members other than the members formed from the present composition.
- the sheet-shaped heat conductive material heat conductive sheet
- the sheet-shaped support include a plastic film, a metal film, and a glass plate.
- the material of the plastic film include polyester such as polyethylene terephthalate (PET), polycarbonate, acrylic resin, epoxy resin, polyurethane, polyamide, polyolefin, cellulose derivative, and silicone.
- PET polyethylene terephthalate
- the metal film include a copper film.
- A-6 used in Examples and Comparative Examples is shown below.
- the acid anhydride used as the curing agent in Example 14 also corresponds to Compound X.
- A-6 A mixture of 3-methyl-1,2,3,6-tetrahydrophthalic anhydride and 4-methyl-1,2,3,6-tetrahydrophthalic anhydride ("HN" manufactured by Hitachi Chemical Co., Ltd. -2200 ")
- Epoxy compound> The epoxy compounds used in Examples and Comparative Examples are shown below.
- B-3 below is a mixture of two types of epoxy compounds (trade name: Epototo ZX-1059, manufactured by Toto Kasei Co., Ltd.).
- PPh 3 triphenylphosphine
- X-1 Trimethylolpropane triacrylate
- X-2 Silane coupling agent
- KBM-503 Silane coupling agent
- X-3 curable silanol
- VF-600 curable silanol
- X-4" A mixture of 3-methyl-1,2,3,6-tetrahydrophthalic anhydride and 4-methyl-1,2,3,6-tetrahydrophthalic anhydride ("HN” manufactured by Hitachi Chemical Co., Ltd.
- Polyamic acid "X-9” consisting of 5): 2-methacryloyloxyethyl succinic acid ("Light Ester HO-MS” manufactured by Kyoeisha Chemical Co., Ltd.)
- X-10 Maleic acid (manufactured by Tokyo Chemical Industry Co., Ltd.)
- DISPERBYK-106 (a polymer salt having an acidic group) was used as a dispersant.
- Epoxy compounds and curing agents (phenolic compounds or acid anhydrides) of the combinations shown in Table 1 below are equivalent (the number of epoxy groups in the epoxy compound and the number of hydroxyl groups in the phenol compound or the acid-free groups in the acid anhydride.
- a cured solution was prepared in an amount (amount equal to the number).
- the curing liquid, solvent, compound X, polymerization initiator, dispersant, surface modifier, and curing accelerator were mixed in this order, and then an inorganic substance was added.
- the obtained mixture was treated with a rotation revolution mixer (manufactured by THINKY, Awatori Rentaro ARE-310) for 5 minutes to obtain a composition (composition for forming a heat conductive material) of each Example or Comparative Example.
- the amount of the solvent added was set so that the solid content concentration of the composition was 50 to 80% by mass.
- the solid content concentration of the composition was adjusted for each composition within the above range so that the viscosities of the compositions were about the same.
- the amount of the curing accelerator added was such that the content of the curing accelerator in the composition was 1% by mass with respect to the content of the epoxy compound (column "* A" in the table).
- Table 1 shows the types of curing accelerators used.
- the amount of compound X added was such that the content of compound X in the composition became the value (mass%) shown in Table 1 with respect to the total solid content of the composition. Table 1 shows the types of compound X used.
- the amount of the polymerization initiator added was such that the content of the polymerization initiator in the composition was 1% by mass with respect to the content of the compound X (column "* B" in the table).
- Table 1 shows the types of polymerization initiators used.
- the amount of the inorganic substances added (total of all the inorganic substances) was set so that the content of the inorganic substances in the composition became the value (mass%) shown in Table 1 with respect to the total solid content of the composition.
- the amount of the dispersant added was such that the content of the dispersant in the composition was 0.2% by mass with respect to the content of the inorganic substance.
- the amount of the surface modifier added is 0.3 when the content of the surface modifier in the composition is 0.3 with respect to the content of the inorganic nitride (addition amount of HP-40 MF100).
- the amount was set to be mass%.
- the content of the curing liquid composed of the curing agent and the epoxy compound is the remaining amount of the total solid content of the composition excluding the inorganic substance, the curing accelerator, the compound X, the polymerization initiator, the dispersant, and the surface modifier. (Mass%).
- the prepared composition was uniformly applied onto the release surface of a release-treated polyester film (NP-100A, manufactured by Panac, film thickness 100 ⁇ m), and left at 120 ° C. for 5 minutes to form a coating film.
- NP-100A manufactured by Panac, film thickness 100 ⁇ m
- Got Two such polyester films with a coating film are produced, the two polyester films with a coating film are bonded to each other on the coating film surfaces, and then heat pressed under air (hot plate temperature 65 ° C., pressure 12 MPa).
- a semi-cured film was obtained by treatment for minutes).
- the obtained semi-cured film was treated with a hot press under air (hot plate temperature 160 ° C., pressure 12 MPa for 20 minutes, and then further treated at normal pressure at 180 ° C. for 90 minutes) to cure the coating film, and the resin sheet was cured.
- Got The polyester films on both sides of the resin sheet were peeled off to obtain a heat conductive sheet having an average film thickness of 200 ⁇ m.
- Thermal conductivity evaluation was carried out using each thermal conductivity sheet obtained by using each composition.
- the thermal conductivity was measured by the following method, and the thermal conductivity was evaluated according to the following criteria.
- ⁇ Copper peel test> Using an applicator, the prepared composition was uniformly applied onto the release surface of a release-treated polyester film (NP-100A, manufactured by Panac, film thickness 100 ⁇ m), and left at 120 ° C. for 5 minutes to form a coating film. Got Two such coating films were prepared, and the two coating films were bonded together at 120 ° C. Then, the polyester film was peeled off to obtain a laminate. Next, the obtained laminate was sandwiched between the electrolytic copper foil (thickness: 35 ⁇ m) and aluminum (thickness: 800 ⁇ m) as an adherend, and bonded by a hot press (20 MPa, 120 ° C., 1 minute). A semi-cured sheet was obtained.
- NP-100A NP-100A, manufactured by Panac, film thickness 100 ⁇ m
- the semi-cured sheet is hot-pressed (5 MPa, 180 ° C., 5 minutes) and then cured (180 ° C., 90 minutes) to form a sheet layer (cured layer formed from the above laminate).
- the adherend was integrated. Then, it was cut out to a size of 20 mm ⁇ 70 mm to prepare a test piece for a peeling test.
- the copper foil portion was subjected to a 90 ° peel test at a peeling speed of 50 mm / min using a tensile test device manufactured by A & D Co., Ltd., and the adherend and the sheet layer were adhered to each other. The degree was evaluated by adhesive strength.
- Table 1 ⁇ result ⁇ Table 1 is shown below.
- the "number of functional groups” in the “hardener” column indicates the hydroxyl group content (mmol / g) of the phenol compound used or the acid anhydride group content (mmol / g) of the acid anhydride used. ..
- the column of "Structure of compound X” indicates the structure of compound X used.
- the specific functional group selected from the group consisting of an alkenyl group, an acrylate group, a methacrylate group, a silyl group, an acid anhydride group, a cyanate ester group, an amino group, a thiol group, and a carboxylic acid group is used.
- the case where the compound has one or more groups (compound X1) is shown as “A”
- the case where the compound X used is a compound having a polyamic acid structure (compound X2) is shown as "B”.
- the column of "Type of specific functional group” indicates the type of specific functional group possessed by the compound X1 used.
- compound X is a compound having at least one specific functional group selected from the group consisting of an alkenyl group, a (meth) acrylate, and a silyl group. If there is, or if it is a compound having a polyamic acid structure (corresponding to Examples 1, 2, 4, 10, 20) (preferably, if compound X is a compound having an alkenyl group (corresponding to Example 4)) It can be seen that the obtained heat conductive sheet is more excellent in heat conductivity, insulating property, and adhesiveness.
- Example 2 From the comparison between Example 2 and Example 3, when the content of the compound X in the composition is 15% by mass or more with respect to the total solid content of the composition, the thermal conductivity and insulation of the obtained heat conductive sheet It can be seen that the properties and adhesiveness are more excellent. From the comparison between Examples 4 and 5, when the content of the compound X in the composition is 35% by mass or less with respect to the total solid content of the composition, the thermal conductivity and insulation of the obtained heat conductive sheet It can be seen that the properties and adhesiveness are more excellent.
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Abstract
Description
このような問題に対応するため、パワー半導体デバイスからの放熱を促進する熱伝導材料が用いられている。
例えば、特許文献1では、「熱硬化性樹脂組成物で形成されたシート体を備えた熱伝導性シートであり、前記熱硬化性樹脂組成物は、熱硬化性樹脂と無機窒化物粒子とを含有し、前記無機窒化物粒子を50体積%以上含有しており、前記無機窒化物粒子は、粒径30μm以下の窒化アルミニウム粒子を15体積%以上の割合で含有し、粒径20μm以下の窒化アルミニウム粒子を10体積%以上の割合で含有し、且つ、粒径10μm以下の窒化アルミニウム粒子を5体積%以上の割合で含有する熱伝導性シート。(請求項1)」が開示されている。上記無機窒化物粒子としては、その表面の一部又は全部をシランカップリング剤で処理したものが提案されている(請求項3)。
また、本発明は、上記熱伝導材料形成用組成物により形成される熱伝導材料、熱伝導シート、及び熱伝導層付きデバイスを提供することをも課題とする。
無機物と、
アルケニル基、アクリレート基、メタクリレート基、シリル基、酸無水物基、シアネートエステル基、アミノ基、チオール基、及びカルボン酸基からなる群より選ばれる官能基を1個以上有するか、又はポリアミック酸構造を有する化合物Xと、を含む熱伝導材料形成用組成物であって、
上記無機物の含有量が、組成物の全固形分に対して、10質量%以上であり、
上記化合物Xの含有量が、組成物の全固形分に対して、10質量%以上である、熱伝導材料形成用組成物。
〔2〕 さらに、フェノール化合物を含む、〔1〕に記載の熱伝導材料形成用組成物。
〔3〕 上記フェノール化合物の水酸基含有量が、12.0mmol/g以上である、〔2〕に記載の熱伝導材料形成用組成物。
〔4〕 上記フェノール化合物の分子量が、400以下である、〔2〕又は〔3〕に記載の熱伝導材料形成用組成物。
〔5〕 上記化合物Xが、アルケニル基、アクリレート基、メタクリレート基、及びシリル基からなる群より選ばれる官能基を1個以上有するか、又はポリアミック酸構造を有する、〔1〕~〔4〕のいずれかに記載の熱伝導材料形成用組成物。
〔6〕 上記化合物Xが、直鎖状又は分岐鎖状のオルガノポリシロキサンであって、且つケイ素原子に結合したアルケニル基を2個以上有する、〔1〕~〔5〕のいずれかに記載の熱伝導材料形成用組成物。
〔7〕 上記化合物Xの含有量が、組成物の全固形分に対して、15~35質量%である、〔1〕~〔6〕のいずれかに記載の熱伝導材料形成用組成物。
〔8〕 上記無機物が、無機窒化物を含む、〔1〕~〔7〕のいずれかに記載の熱伝導材料形成用組成物。
〔9〕 上記無機窒化物が、窒化ホウ素を含む、〔8〕に記載の熱伝導材料形成用組成物。
〔10〕 更に、上記無機物の表面修飾剤を含む、〔1〕~〔9〕のいずれかに記載の熱伝導材料形成用組成物。
〔11〕 上記表面修飾剤が、縮環骨格又はトリアジン骨格を有する、〔10〕に記載の熱伝導材料形成用組成物。
〔12〕 更に、硬化促進剤を含む、〔1〕~〔11〕のいずれかに記載の熱伝導材料形成用組成物。
〔13〕 〔1〕~〔12〕のいずれかに記載の熱伝導材料形成用組成物を硬化して得られる、熱伝導材料。
〔14〕 〔13〕に記載の熱伝導材料からなる、熱伝導シート。
〔15〕 デバイスと、上記デバイス上に配置された〔14〕に記載の熱伝導シートを含む熱伝導層とを有する、熱伝導層付きデバイス。
また、本発明によれば、上記熱伝導材料形成用組成物により形成される熱伝導材料、熱伝導シート、及び熱伝導層付きデバイスを提供できる。
以下に記載する構成要件の説明は、本発明の代表的な実施態様に基づいてなされる場合があるが、本発明はそのような実施態様に制限されない。
なお、本明細書において、「~」を用いて表される数値範囲は、「~」の前後に記載される数値を下限値及び上限値として含む範囲を意味する。
また、本明細書において、オキシラニル基は、エポキシ基とも呼ばれる官能基であり、例えば、飽和炭化水素環基の隣接する炭素原子2つがオキソ基(-O-)により結合してオキシラン環を形成している基等もオキシラニル基に含む。オキシラニル基は、可能な場合、置換基(メチル基等)を有していてもよいし有していなくてもよい。
ハロゲン原子(-F、-Br、-Cl、-I)、水酸基、アミノ基、カルボン酸基及びその共役塩基基、無水カルボン酸基、シアネートエステル基、不飽和重合性基、オキシラニル基、オキセタニル基、アジリジニル基、チオール基、イソシアネート基、チオイソシアネート基、アルデヒド基、アルコキシ基、アリーロキシ基、アルキルチオ基、アリールチオ基、アルキルジチオ基、アリールジチオ基、N-アルキルアミノ基、N,N-ジアルキルアミノ基、N-アリールアミノ基、N,N-ジアリールアミノ基、N-アルキル-N-アリールアミノ基、アシルオキシ基、カルバモイルオキシ基、N-アルキルカルバモイルオキシ基、N-アリールカルバモイルオキシ基、N,N-ジアルキルカルバモイルオキシ基、N,N-ジアリールカルバモイルオキシ基、N-アルキル-N-アリールカルバモイルオキシ基、アルキルスルホキシ基、アリールスルホキシ基、アシルチオ基、アシルアミノ基、N-アルキルアシルアミノ基、N-アリールアシルアミノ基、ウレイド基、N’-アルキルウレイド基、N’,N’-ジアルキルウレイド基、N’-アリールウレイド基、N’,N’-ジアリールウレイド基、N’-アルキル-N’-アリールウレイド基、N-アルキルウレイド基、N-アリールウレイド基、N’-アルキル-N-アルキルウレイド基、N’-アルキル-N-アリールウレイド基、N’,N’-ジアルキル-N-アルキルウレイド基、N’,N’-ジアルキル-N-アリールウレイド基、N’-アリール-N-アルキルウレイド基、N’-アリール-N-アリールウレイド基、N’,N’-ジアリール-N-アルキルウレイド基、N’,N’-ジアリール-N-アリールウレイド基、N’-アルキル-N’-アリール-N-アルキルウレイド基、N’-アルキル-N’-アリール-N-アリールウレイド基、アルコキシカルボニルアミノ基、アリーロキシカルボニルアミノ基、N-アルキル-N-アルコキシカルボニルアミノ基、N-アルキル-N-アリーロキシカルボニルアミノ基、N-アリール-N-アルコキシカルボニルアミノ基、N-アリール-N-アリーロキシカルボニルアミノ基、ホルミル基、アシル基、アルコキシカルボニル基、アリーロキシカルボニル基、カルバモイル基、N-アルキルカルバモイル基、N,N-ジアルキルカルバモイル基、N-アリールカルバモイル基、N,N-ジアリールカルバモイル基、N-アルキル-N-アリールカルバモイル基、アルキルスルフィニル基、アリールスルフィニル基、アルキルスルホニル基、アリールスルホニル基、スルホ基(-SO3H)及びその共役塩基基、アルコキシスルホニル基、アリーロキシスルホニル基、スルフィナモイル基、N-アルキルスルフィナモイル基、N,N-ジアルキルスルフィナモイル基、N-アリールスルフィナモイル基、N,N-ジアリールスルフィナモイル基、N-アルキル-N-アリールスルフィナモイル基、スルファモイル基、N-アルキルスルファモイル基、N,N-ジアルキルスルファモイル基、N-アリールスルファモイル基、N,N-ジアリールスルファモイル基、N-アルキル-N-アリールスルファモイル基、N-アシルスルファモイル基及びその共役塩基基、N-アルキルスルホニルスルファモイル基(-SO2NHSO2(alkyl))及びその共役塩基基、N-アリールスルホニルスルファモイル基(-SO2NHSO2(aryl))及びその共役塩基基、N-アルキルスルホニルカルバモイル基(-CONHSO2(alkyl))及びその共役塩基基、N-アリールスルホニルカルバモイル基(-CONHSO2(aryl))及びその共役塩基基、アルコキシシリル基(-Si(Oalkyl)3)、アリーロキシシリル基(-Si(Oaryl)3)、ヒドロキシシリル基(-Si(OH)3)及びその共役塩基基、ホスホノ基(-PO3H2)及びその共役塩基基、ジアルキルホスホノ基(-PO3(alkyl)2)、ジアリールホスホノ基(-PO3(aryl)2)、アルキルアリールホスホノ基(-PO3(alkyl)(aryl))、モノアルキルホスホノ基(-PO3H(alkyl))及びその共役塩基基、モノアリールホスホノ基(-PO3H(aryl))及びその共役塩基基、ホスホノオキシ基(-OPO3H2)及びその共役塩基基、ジアルキルホスホノオキシ基(-OPO3(alkyl)2)、ジアリールホスホノオキシ基(-OPO3(aryl)2)、アルキルアリールホスホノオキシ基(-OPO3(alkyl)(aryl))、モノアルキルホスホノオキシ基(-OPO3H(alkyl))及びその共役塩基基、モノアリールホスホノオキシ基(-OPO3H(aryl))及びその共役塩基基、シアノ基、ニトロ基、アリール基、アルケニル基、アルキニル基、及びアルキル基。
また、これらの置換基は、可能であるならば置換基同士、又は置換している基と結合して環を形成してもよいし、していなくてもよい。
また、本明細書において、重量平均分子量は、GPC(Gel Permeation Chromatography)法によるポリスチレン換算値として定義される。
本発明の熱伝導材料形成用組成物(以下、単に「組成物」とも言う)は、
エポキシ化合物と、
無機物と、
化合物Xと、を含む熱伝導材料形成用組成物であって、
上記無機物の含有量が、組成物の全固形分に対して、10質量%以上であり、
上記化合物Xの含有量が、組成物の全固形分に対して、10質量%以上である。
上記化合物Xとは、アルケニル基、アクリレート基、メタクリレート基、シリル基、酸無水物基、シアネートエステル基、アミノ基、チオール基、及びカルボン酸基からなる群より選ばれる官能基を1個以上有する化合物(以下「化合物X1」ともいう。)、又はポリアミック酸構造を有する化合物(以下「化合物X2」ともいう。)である。
本発明の組成物が、上記のような構成で本発明の課題が解決されるメカニズムは必ずしも明らかではないが、本発明者らは以下のように推測している。
すなわち、本発明の組成物が上記化合物X1を所定量で含む場合、エポキシ化合物と化合物X1との反応による架橋構造及び/又は化合物X1同士の反応による架橋構造が形成されやすく、架橋点の多い緻密な架橋構造が形成され易い。また、本発明の組成物が上記化合物X2を所定量で含む場合、ポリアミック酸構造の分子間相互作用によって緻密な架橋構造が形成されやすい。つまり、本発明の組成物が上記化合物Xを所定量で含む場合、緻密な架橋構造が形成されやすく、得られる熱伝導材料の熱伝導性が向上している、と推測している。
更に、本発明の組成物は、無機物を所定量含むことにより、優れた熱伝導性が発現する、推測している。
また、本発明の組成物から得られる熱伝導材料は、絶縁性(電気絶縁性)及び接着性も良好である。
本発明の組成物は、エポキシ化合物を含む。
エポキシ化合物は、1分子中に、少なくとも1個のエポキシ基(オキシラニル基)を有する化合物である。エポキシ基は、可能な場合、置換基を有していても有していなくてもよい。
エポキシ化合物が有するエポキシ基の数は、1分子中、2以上が好ましく、2~40がより好ましく、2~10が更に好ましく、2が特に好ましい。
エポキシ化合物の分子量は、150~10000が好ましく、150~2000がより好ましく、200~600が更に好ましい。
なお、上記エポキシ基含有量は、エポキシ化合物1gが有する、エポキシ基の数を意図する。
エポキシ化合物は、常温(23℃)で、液状であるのが好ましい。
つまり、エポキシ化合物は、液晶化合物であってよい。言い換えれば、エポキシ基を有する液晶化合物もエポキシ化合物として使用できる。
エポキシ化合物(液晶性のエポキシ化合物であってもよい)としては、例えば、少なくとも部分的に棒状構造を含む化合物(棒状化合物)、及び少なくとも部分的に円盤状構造を含む化合物円盤状化合物が挙げられる。
なかでも、得られる熱伝導材料の熱伝導性がより優れる点から棒状化合物が好ましい。
以下、棒状化合物及び円盤状化合物について詳述する。
棒状化合物であるエポキシ化合物としては、例えば、アゾメチン類、アゾキシ類、シアノビフェニル類、シアノフェニルエステル類、安息香酸エステル類、シクロヘキサンカルボン酸フェニルエステル類、シアノフェニルシクロヘキサン類、シアノ置換フェニルピリミジン類、アルコキシ置換フェニルピリミジン類、フェニルジオキサン類、トラン類、及びアルケニルシクロヘキシルベンゾニトリル類が挙げられる。以上のような低分子化合物だけではなく、高分子化合物も使用できる。上記高分子化合物は、低分子の反応性基を有する棒状化合物が重合した高分子化合物である。
好ましい棒状化合物としては、下記一般式(XXI)で表される棒状化合物が挙げられる。
一般式(XXI):Q1-L111-A111-L113-M-L114-A112-L112-Q2
Q1及びQ2のエポキシ基は、置換基を有していてもよいし、有していなくてもよい。
L111、L112、L113、及びL114で表される2価の連結基としては、それぞれ独立に、-O-、-S-、-CO-、-NR112-、-CO-O-、-O-CO-O-、-CO-NR112-、-NR112-CO-、-O-CO-、-CH2-O-、-O-CH2-、-O-CO-NR112-、-NR112-CO-O-、及び-NR112-CO-NR112-からなる群より選ばれる2価の連結基であるのが好ましい。上記R112は炭素数1~7のアルキル基又は水素原子である。
なかでも、L113及びL114は、それぞれ独立に、-O-が好ましい。
L111及びL112は、それぞれ独立に、単結合が好ましい。
2価の連結基は、隣接していない酸素原子及び硫黄原子等のヘテロ原子を含んでいてもよい。なかでも、炭素数1~12の、アルキレン基、アルケニレン基、又はアルキニレン基が好ましい。上記、アルキレン基、アルケニレン基、又はアルキニレン基がエステル基を有していてもよいし、有していなくてもよい。
2価の連結基は直鎖状であるのが好ましく、また、上記2価の連結基は置換基を有していてもよいし、有していなくてもよい。置換基としては、例えば、ハロゲン原子(フッ素原子、塩素原子、及び臭素原子)、シアノ基、メチル基、及びエチル基が挙げられる。
なかでも、A111及びA112は、それぞれ独立に、炭素数1~12のアルキレン基が好ましく、メチレン基がより好ましい。
一般式(XXII):-(W1-L115)n-W2-
W1及びW2は、それぞれ置換基を有していてもよい。置換基としては、例えば、上述した置換基群Yで例示された基が挙げられ、より具体的には、ハロゲン原子(フッ素原子、塩素原子、臭素原子、及びヨウ素原子)、シアノ基、炭素数1~10のアルキル基(例えば、メチル基、エチル基、及びプロピル基等)、炭素数1~10のアルコキシ基(例えば、メトキシ基、及びエトキシ基等)、炭素数1~10のアシル基(例えば、ホルミル基、及びアセチル基等)、炭素数1~10のアルコキシカルボニル基(例えば、メトキシカルボニル基、及びエトキシカルボニル基等)、炭素数1~10のアシルオキシ基(例えば、アセチルオキシ基、及びプロピオニルオキシ基等)、ニトロ基、トリフルオロメチル基、及びジフルオロメチル基等が挙げられる。
W1が複数存在する場合、複数存在するW1は、それぞれ同一でも異なっていてもよい。
L115が複数存在する場合、複数存在するL115は、それぞれ同一でも異なっていてもよい。
なお、一般式(XXI)で表される化合物は、特表平11-513019号公報(WO97/00600)に記載の方法を参照して合成できる。
棒状化合物は、特開平11-323162号公報及び特許4118691号に記載のメソゲン基を有するモノマーであってもよい。
なかでも、LE1は、2価の連結基が好ましい。
2価の連結基は、-O-、-S-、-CO-、-NH-、-CH=CH-、-C≡C-、-CH=N-、-N=CH-、-N=N-、置換意を有していてもよいアルキレン基、又はこれらの2以上の組み合わせからなる基が好ましく、-O-アルキレン基-又は-アルキレン基-O-がより好ましい。
なお上記アルキレン基は、直鎖状、分岐鎖状、及び環状のいずれでもよいが、炭素数1~2の直鎖状アルキレン基が好ましい。
複数存在するLE1は、それぞれ同一でも異なっていてもよい。
なかでも、LE2は、それぞれ独立に、単結合、-CO-O-、又は-O-CO-が好ましい。
LE2が複数存在する場合、複数存在するLE2は、それぞれ同一でも異なっていてもよい。
LE3で表される芳香族環基及び非芳香族環基の例としては、例えば、置換基を有していてもよい、1,4-シクロヘキサンジイル基、1,4-シクロヘキセンジイル基、1,4-フェニレン基、ピリミジン-2,5-ジイル基、ピリジン-2,5-ジイル基、1,3,4-チアジアゾール-2,5-ジイル基、1,3,4-オキサジアゾール-2,5-ジイル基、ナフタレン-2,6-ジイル基、ナフタレン-1,5-ジイル基、チオフェン-2,5-ジイル基、及びピリダジン-3,6-ジイル基が挙げられる。1,4-シクロヘキサンジイル基の場合、トランス体及びシス体の構造異性体のどちらの異性体であってもよく、任意の割合の混合物でもよい。なかでも、トランス体であるのが好ましい。
なかでも、LE3は、単結合、1,4-フェニレン基、又は1,4-シクロヘキセンジイル基が好ましい。
LE3で表される基が有する置換基は、それぞれ独立に、アルキル基、アルコキシ基、ハロゲン原子、シアノ基、ニトロ基、又はアセチル基が好ましく、アルキル基(好ましくは炭素数1)がより好ましい。
なお、置換基が複数存在する場合、置換基は、それぞれ同一でも異なっていてもよい。
LE3が複数存在する場合、複数存在するLE3は、それぞれ同一でも異なっていてもよい。
peが2以上の整数である場合、複数存在する(-LE3-LE2-)は、それぞれ同一でも異なっていてもよい。
なかでも、peは、0~2が好ましく、0又は1がより好ましく、0が更に好ましい。
置換基は、それぞれ独立に、アルキル基、アルコキシ基、ハロゲン原子、シアノ基、ニトロ基、又はアセチル基が好ましく、アルキル基(好ましくは炭素数1)がより好ましい。
複数存在するLE4は、それぞれ同一でも異なっていてもよい。また、次に説明するleが2以上の整数である場合、同一の(LE4)le中に複数存在するLE4も、それぞれ同一でも異なっていてもよい。
なかでも、leは、それぞれ独立に、0~2が好ましい。
複数存在するleは、それぞれ同一でも異なっていてもよい。
円盤状化合物であるエポキシ化合物は、少なくとも部分的に円盤状構造を有する。
円盤状構造は、少なくとも、脂環又は芳香族環を有する。特に、円盤状構造が、芳香族環を有する場合、円盤状化合物は、分子間のπ-π相互作用によるスタッキング構造の形成により柱状構造を形成しうる。
円盤状構造として、具体的には、Angew.Chem.Int. Ed. 2012, 51, 7990-7993又は特開平7-306317号公報に記載のトリフェニレン構造、並びに、特開2007-2220号公報及び特開2010-244038号公報に記載の3置換ベンゼン構造等が挙げられる。
円盤状化合物が有するエポキシ基の数は、8以下が好ましく、6以下より好ましい。
円盤状化合物としては、Angew.Chem.Int. Ed. 2012, 51, 7990-7993、及び特開平7-306317号公報に記載のトリフェニレン構造、並びに特開2007-2220号公報、及び特開2010-244038号公報に記載の3置換ベンゼン構造において末端の少なくとも1つ(好ましくは3つ以上)をエポキシ基とした化合物等が挙げられる。
まず、式(D1)~(D15)について説明し、その後、式(D16)について説明する。
なお、以下の式中、「-LQ」は「-L-Q」を表し、「QL-」は「Q-L-」を表す。
熱伝導材料の熱伝導性がより優れる観点から、Lは、それぞれ独立に、アルキレン基、アルケニレン基、アリーレン基、-CO-、-NH-、-O-、-S-、及びこれらの組み合わせからなる群より選ばれる基であるのが好ましく、アルキレン基、アルケニレン基、アリーレン基、-CO-、-NH-、-O-、及び-S-からなる群より選ばれる基を2個以上組み合わせた基であるのがより好ましい。
上記アルキレン基の炭素数は、1~12が好ましい。上記アルケニレン基の炭素数は、2~12が好ましい。上記アリーレン基の炭素数は、10以下が好ましい。
アルキレン基、アルケニレン基、及びアリーレン基は、置換基(好ましくは、アルキル基、ハロゲン原子、シアノ、アルコキシ基、及びアシルオキシ基等)を有していてもよい。
ALはアルキレン基又はアルケニレン基を意味し、ARはアリーレン基を意味する。
L102:-AL-CO-O-AL-O-
L103:-AL-CO-O-AL-O-AL-
L104:-AL-CO-O-AL-O-CO-
L105:-CO-AR-O-AL-
L106:-CO-AR-O-AL-O-
L107:-CO-AR-O-AL-O-CO-
L108:-CO-NH-AL-
L109:-NH-AL-O-
L110:-NH-AL-O-CO-
L111:-O-AL-
L112:-O-AL-O-
L113:-O-AL-O-CO-
L115:-O-AL-S-AL-
L116:-O-CO-AL-AR-O-AL-O-CO-
L117:-O-CO-AR-O-AL-CO-
L118:-O-CO-AR-O-AL-O-CO-
L119:-O-CO-AR-O-AL-O-AL-O-CO-
L120:-O-CO-AR-O-AL-O-AL-O-AL-O-CO-
L121:-S-AL-
L122:-S-AL-O-
L123:-S-AL-O-CO-
L124:-S-AL-S-AL-
L125:-S-AR-AL-
L126:-O-CO-AL-
L127:-O-CO-AL-O-
L128:-O-CO-AR-O-AL-
L129:-O-CO-
L130:-O-CO-AR-O-AL-O-CO-AL-S-AR-
L131:-O-CO-AL-S-AR-
L132:-O-CO-AR-O-AL-O-CO-AL-S-AL-
L133:-O-CO-AL-S-AR-
L134:-O-AL-S-AR-
L135:-AL-CO-O-AL-O-CO-AL-S-AR-
L136:-AL-CO-O-AL-O-CO-AL-S-AL-
L137:-O-AL-O-AR-
L138:-O-AL-O-CO-AR-
L139:-O-AL-NH-AR-
L140:-O-CO-AL-O-AR-
L141:-O-CO-AR-O-AL-O-AR-
L142:-AL-CO-O-AR-
L143:-AL-CO-O-AL-O-AR-
置換基としては、上述した置換基群Yで例示される基が挙げられる。より具体的には、置換基としては、上記反応性官能基、ハロゲン原子、イソシアネート基、シアノ基、不飽和重合性基、エポキシ基、オキセタニル基、アジリジニル基、チオイソシアネート基、アルデヒド基、及びスルホ基が挙げられる。
ただし、Qがエポキシ基以外の基である場合、Qはエポキシ基に対して安定であるのが好ましい。
なお、式(D1)~(D15)中、1つ以上(好ましくは2つ以上)のQは、エポキシ基を表す。なかでも、熱伝導材料の熱伝導性がより優れる観点から、すべてのQがエポキシ基を表すのが好ましい。
なお、式(D1)~(D15)で表される化合物は、エポキシ基の安定性の点からは、-NH-を有さないのが好ましい。
式(D4)で表される化合物としては、熱伝導材料の熱伝導性がより優れる観点から、式(XI)で表される化合物が好ましい。
なお、*はトリフェニレン環との結合位置を表す。
R11、R12、R13、R14、R15、及びR16のうち、2個以上は、*-X11-L11-P11であり、3個以上が*-X11-L11-P11であるのが好ましい。
なかでも、熱伝導材料の熱伝導性がより優れる観点から、R11及びR12のいずれか1個以上、R13及びR14のいずれか1個以上、並びに、R15及びR16のいずれか1個以上が、*-X11-L11-P11であるのが好ましい。
R11、R12、R13、R14、R15、及びR16が、全て、*-X11-L11-P11であるのがより好ましい。加えて、R11、R12、R13、R14、R15、及びR16が、全て同一であるのが更に好ましい。
なかでも、X11は、それぞれ独立に、-O-、-O-CO-、-O-CO-O-、-O-CO-NH-、-CO-O-、-CO-NH-、-NH-CO-、又は-NH-CO-O-が好ましく、-O-、-O-CO-、-CO-O-、-O-CO-NH-、又は-CO-NH-がより好ましく、-O-CO-又は-CO-O-が更に好ましい。
2価の連結基の例としては、-O-、-O-CO-、-CO-O-、-S-、-NH-、アルキレン基(炭素数は、1~10が好ましく、1~8がより好ましく、1~7が更に好ましい。)、アリーレン基(炭素数は、6~20が好ましく、6~14がより好ましく、6~10が更に好ましい。)、又はこれらの組み合わせからなる基が挙げられる。
上記アルキレン基としては、メチレン基、エチレン基、プロピレン基、ブチレン基、ペンチレン基、ヘキシレン基、及びヘプチレン基が挙げられる。
上記アリーレン基としては、1,4-フェニレン基、1,3-フェニレン基、1,4-ナフチレン基、1,5-ナフチレン基、及びアントラセニレン基が挙げられ、1,4-フェニレン基が好ましい。
上記アルキレン基及び上記アリーレン基は無置換であるのも好ましい。なかでも、アルキレン基は無置換であるのが好ましい。
L12は、L11と同様であり、好適な条件も同様である。
-X12-L12-の例として、上述のLの例であるL101~L143が挙げられる。
Y12が、炭素数1~20の直鎖状、分岐鎖状、若しくは、環状のアルキル基、又は炭素数1~20の直鎖状、分岐鎖状、若しくは、環状のアルキル基において1個又は2個以上のメチレン基が-O-、-S-、-NH-、-N(CH3)-、-CO-、-O-CO-、又は-CO-O-で置換された基の場合、Y12に含まれる水素原子の1個以上がハロゲン原子で置換されていてもよい。
R17X、R18X、及びR19Xは、それぞれ独立に、*-X211X-(Z21X-X212X)n21X-L21X-Qを表す。*は、中心環との結合位置を表す。
X211X及びX212Xは、それぞれ独立に、単結合、-O-、-CO-、-NH-、-O-CO-、-O-CO-O-、-O-CO-NH-、-O-CO-S-、-CO-O-、-CO-NH-、-CO-S-、-NH-CO-、-NH-CO-O-、-NH-CO-NH-、-NH-CO-S-、-S-、-S-CO-、-S-CO-O-、-S-CO-NH-、又は-S-CO-S-を表す。
Z21Xは、それぞれ独立に、5員環若しくは6員環の芳香族環基、又は5員環若しくは6員環の非芳香族環基を表す。
L21Xは、単結合又は2価の連結基を表す。
Qは、式(D1)~(D15)におけるQと同義であり、好ましい条件も同様である。式(D16)中、複数存在するQのうち、少なくとも1つ(好ましくは全部)のQは、エポキシ基を表す。
n21Xは、0~3の整数を表す。n21Xが2以上の場合、複数存在する(Z21X-X212X)は、同一でも異なっていてもよい。
ただし、式(D16)で表される化合物は、エポキシ基の安定性の点からは、-NH-を有さないのが好ましい。
R17、R18、及びR19のうち2個以上は、*-X211-(Z21-X212)n21-L21-P21である。熱伝導材料の熱伝導性がより優れる観点から、R17、R18、及びR19は全てが、*-X211-(Z21-X212)n21-L21-P21であるのが好ましい。
加えて、R17、R18、及びR19が、全て同一であるのが好ましい。
なかでも、X211、X212、X221、及びX222としては、それぞれ独立に、単結合、-O-、-CO-O-、又は-O-CO-が好ましい。
A41及びA42は、少なくとも一方が窒素原子であるのが好ましく、両方が窒素原子であるのがより好ましい。また、X4は、酸素原子であるのが好ましい。
上述のエポキシ化合物以外の、エポキシ化合物としては、例えば、一般式(DN)で表されるエポキシ化合物が挙げられる。
RDNは、単結合又は2価の連結基を表す。2価の連結基は、-O-、-O-CO-、-CO-O-、-S-、アルキレン基(炭素数は、1~10が好ましい。)、アリーレン基(炭素数は、6~20が好ましい。)、又はこれらの組み合わせからなる基が好ましく、アルキレン基がより好ましく、メチレン基がより好ましい。
なお、エポキシ化合物は、後段で説明する無機窒化物用表面修飾剤における一般式(B01)~(B03)のいずれかで表される化合物であって、エポキシ基を1個以上有する化合物(エポキシ基を有する一般式(B01)~(B03)のいずれかで表される化合物)とは異なるのが好ましい。
なお、例えば、上記化合物X1中のエポキシ基と反応し得る官能基としては、酸無水物基及びシアネートエステル基、並びに、アミノ基、チオール基、及びカルボン酸基に含まれる活性水素が挙げられる。また、硬化剤が後述のフェノール化合物である場合、フェノール化合物中のエポキシ基と反応し得る官能基としては水酸基が挙げられる。
なお、本明細書中、「全固形分」とは、熱伝導材料を形成する成分を意図し、溶媒は含まれない。ここでいう、熱伝導材料を形成する成分は、熱伝導材料を形成する際に反応(重合)して化学構造が変化する成分でもよい。また、熱伝導材料を形成する成分であれば、その性状が液体状であっても、固形分とみなす。
本発明の組成物は、無機物を含む。
無機物としては、例えば、従来から熱伝導材料の無機フィラーに用いられているいずれの無機物を用いてもよい。無機物は、熱伝導材料の熱伝導性及び絶縁性がより優れる点から、無機窒化物又は無機酸化物を含むのが好ましく、無機窒化物を含むのがより好ましい。
上記の無機酸化物は、1種のみを使用していてもよいし、2種以上を使用していてもよい。
無機酸化物は、酸化チタン、酸化アルミニウム、又は酸化亜鉛が好ましく、酸化アルミニウムがより好ましい。
無機酸化物は、非酸化物として用意された金属が、環境下等で酸化して生じている酸化物であってもよい。
無機窒化物は、アルミニウム原子、ホウ素原子、又は珪素原子を含むのが好ましく、窒化アルミニウム、窒化ホウ素、又は窒化珪素を含むのがより好ましく、窒化アルミニウム又は窒化ホウ素を含むのが更に好ましく、窒化ホウ素を含むのが特に好ましい。
上記の無機窒化物は、1種のみを使用していてもよいし、2種以上を使用していてもよい。
無機物の平均粒径は、市販品を用いる場合、カタログ値を採用する。カタログ値が無い場合、上記平均粒径は、電子顕微鏡を用いて、100個の無機物を無作為に選択して、それぞれの無機物の粒径(長径)を測定し、それらを算術平均して求める。
無機物は、無機窒化物及び無機酸化物の少なくとも一方を含むのが好ましく、無機窒化物を少なくとも含むのがより好ましい。
上記無機窒化物は、窒化ホウ素及び窒化アルミニウムの少なくとも一方を含むのが好ましく、窒化ホウ素を少なくとも含むのがより好ましい。
無機物中における無機窒化物(好ましくは窒化ホウ素)の含有量は、無機物の全質量に対して10質量%以上が好ましく、50質量%以上がより好ましく、80質量%以上が更に好ましい。上限は、100質量%以下である。
上記無機酸化物は、酸化アルミニウムが好ましい。
熱伝導材料の熱伝導性がより優れる点で、組成物は、平均粒径が20μm以上(好ましくは、40μm以上)の無機物を少なくとも含むのがより好ましい。
本発明の組成物は、化合物Xを含む。
化合物Xは、アルケニル基、アクリレート基、メタクリレート基、シリル基、酸無水物基、シアネートエステル基、アミノ基、チオール基、及びカルボン酸基からなる群より選ばれる官能基(以下「特定官能基」ともいう。)を1個以上有する化合物(化合物X1)であるか、又はポリアミック酸構造を有する化合物(化合物X2)である。
以下において、化合物X1及び化合物X2について、各々詳述する。
化合物X1は、アルケニル基、アクリレート基(-O-CO-CH=CH2)、メタクリレート基(-O-CO-C(CH3)=CH2)、シリル基、酸無水物基、シアネートエステル基(-O-CN)、アミノ基、チオール基(-SH)、及びカルボン酸基(-COOH)からなる群より選ばれる特定官能基を有する。
化合物X1中に含まれる上記特定官能基の数は、1個以上であれば特に制限されないが、2個以上が好ましい。
また、化合物X1としては、低分子化合物であっても高分子化合物であってもよい。
化合物X1の分子量としては特に制限されず、50~100,000が挙げられ、100~100,000が好ましい。なお、化合物X1が高分子化合物である場合、上記分子量は重量平均分子量を意図し、なかでも、1,000~50,000が好ましい。
上記アルケニル基としては、例えば、ビニル基、アリル基、プロペニル基、イソプロペニル基、ブテニル基、ヘキセニル基、及びシクロヘキセニル基等が挙げられ、ビニル基又はアリル基が好ましく、ビニル基がより好ましい。
なお、上記アルケニル基としてビニル基が特定官能基として化合物X1中に含まれる場合、上記ビニル基に結合する原子団は、-COO-ではないことが好ましい。
-Si(RA1)p(ORA2)3-p (A)
式中、RA1は、置換又は無置換の1価の炭化水素基を表す。RA2は、水素原子又は置換若しくは無置換の1価の炭化水素基を表す。pは、0~2の整数を示す。RA1及びRA2が複数存在する場合、複数のRA1同士、及び複数のRA2同士は、互いに同一であっても異なっていてもよい。
RA1及びRA2で表される置換又は無置換の1価の炭化水素基としては、例えば、アルキル基、アリール基、及びアラルキル基が挙げられる。
上記アルキル基としては、直鎖状、分岐鎖状、及び環状のいずれでもよい。
上記アルキル基の炭素数としては、例えば、1~12が挙げられ、1~4が好ましく、1又は2がより好ましい。
上記アルキル基としては、例えば、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、イソブチル基、tert-ブチル基、ペンチル基、ネオペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ドデシル基、シクロペンチル基、シクロヘキシル基、及びシクロヘプチル基等が挙げられる。
上記アリール基としては、例えば、フェニル基、及びナフチル基等が挙げられる。
上記アラルキル基におけるアルキル基部分の好適態様は、上記アルキル基と同様であり、アリール基部分の好適態様は、上記アリール基と同様である。
上記アラルキル基としては、例えば、ベンジル基、フェニルエチル基、及びフェニルプロピル基等が挙げられる。
-N(RB1)2 (B)
式中、RB1は、水素原子又はアルキル基を表す。但し、RB1のうち少なくとも1個は、水素原子である。
上記アルキル基としては、直鎖状、分岐鎖状、及び環状のいずれであってもよい。
上記アルキル基の炭素数としては、例えば、1~10であり、1~6が好ましく、1~3がより好ましい。なお、アルキル基は、更に置換基(例えば、置換基群Yで例示される基)を有していてもよい。
上記アルキル基としては、直鎖状、分岐鎖状、及び環状のいずれでもよい。
上記アルキル基の炭素数としては、例えば、1~12が挙げられ、1~6が好ましい。
上記アルキル基としては、例えば、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、イソブチル基、tert-ブチル基、ペンチル基、ネオペンチル基、ヘキシル基、ヘプチル基、オクチル基、ノニル基、デシル基、ドデシル基、シクロペンチル基、シクロヘキシル基、及びシクロヘプチル基等が挙げられる。
上記アリール基としては、例えば、フェニル基、トリル基、キシリル基、ナフチル基、及びビフェニリル基等が挙げられる。
上記アラルキル基におけるアルキル基部分の好適態様は、上記アルキル基と同様であり、アリール基部分の好適態様は、上記アリール基と同様である。
上記アラルキル基としては、例えば、ベンジル基、フェニルエチル基、フェニルプロピル基、及びメチルベンジル基等が挙げられる。
特定官能基としてアルケニル基を有する化合物X1としては、信越化学工業(株)製のVF-600等の市販品を使用できる。
また、特定官能基として(メタ)アクリレート基を有する化合物X1としては、KAYARAD RP-1040、DPCA-20(日本化薬(株)製)を使用することもできる。
また、特定官能基として(メタ)アクリレート基を有する化合物X1としては、トリメチロールプロパントリ(メタ)アクリレート、トリメチロールプロパンプロピレンオキシ変性トリ(メタ)アクリレート、トリメチロールプロパンエチレンオキシ変性トリ(メタ)アクリレート、イソシアヌル酸エチレンオキシ変性トリ(メタ)アクリレート、及びペンタエリスリトールトリ(メタ)アクリレート等の3官能の(メタ)アクリレート化合物を使用することもできる。3官能の(メタ)アクリレート化合物の市販品としては、アロニックスM-309、M-310、M-321、M-350、M-360、M-313、M-315、M-306、M-305、M-303、M-452、M-450(東亞合成(株)製)、NKエステル A9300、A-GLY-9E、A-GLY-20E、A-TMM-3、A-TMM-3L、A-TMM-3LM-N、A-TMPT、TMPT(新中村化学工業(株)製)、KAYARAD GPO-303、TMPTA、THE-330、TPA-330、PET-30(日本化薬(株)製)等が挙げられる。
市販品としては、例えば、信越化学工業(株)製から販売されているKBM-503等を使用できる。
市販品としては、例えば、ハンツマン・ジャパン(株)から販売されているL-10、XU366、XU378、XU371、三菱ガス化学(株)から販売されているCYTESTER TA、CYTESTER NCN等を使用できる。
また、特定官能基としてチオール基を有する化合物X1としては、1,4-ビス(3-メルカプトブチリルオキシ)ブタン(市販品としては昭和電工(株)製「カレンズMT BD1」)、ペンタエリスリトールテトラキス(3-メルカプトブチレート)(市販品としては昭和電工(株)製「「カレンズMT PE1」)、1,3,5-トリス[2-(3-メルカプトブチリルオキシエチル)]-1,3,5-トリアジン-2,4,6(1H,3H,5H)-トリオン(市販品としては昭和電工(株)製「カレンズMT NR1」)、トリメチロールエタントリス(3-メルカプトブチレート)(市販品としては昭和電工(株)製「「TEMB」)、トリメチロールプロパントリス(3-メルカプトブチレート)(市販品としては昭和電工(株)製「「TPMB」)等も使用できる。
なお、上記特定官能基含有量は、1gの化合物X1が有する、特定官能基の数を意図する。
また、特定官能基が、酸無水物基、シアネートエステル基、アミノ基、チオール基、又はカルボン酸基である場合、組成物における、エポキシ化合物の含有量と、上記化合物X1及び任意で含まれる硬化剤(例えば、後述のフェノール化合物)の合計含有量との比(エポキシ化合物のエポキシ基と、上記化合物X1中におけるエポキシ基と反応し得る官能基及び任意で含まれる硬化剤中におけるエポキシ基と反応し得る官能基との当量比(エポキシ基の数/エポキシ基と反応し得る官能基の数))は、既述のとおりである。
化合物X2は、ポリアミック酸構造を有する化合物である。
ポリアミック酸構造を有する化合物は、酸二無水物とジアミンとを重合反応させて得られ、-CO-NH-結合及び-COOH基を有する繰り返し単位を含むポリマー構造(ポリアミック酸構造)を有する。
上記酸二無水物としては、ピロメリット酸二無水物、3,3,4,4-ベンゾフェノンテトラカルボン酸二無水物、3,3,4,4-ビフェニルテトラカルボン酸二無水物、2,3,3,4-ビフェニルテトラカルボン酸二無水物、2,3,6,7-ナフタレンテトラカルボン酸二無水物、1,2,5,6-ナフタレンテトラカルボン酸二無水物、及び1,4,5,8-ナフタレンテトラカルボン酸二無水物等の芳香族テトラカルボン酸二無水物が挙げられる。なお、これらを2種以上使用してもよい。
上記ジアミンの例としては、4,4-ジアミノジフェニルエーテル、4,4-ジアミノジフェニルメタン、3,3-ジアミノジフェニルメタン、3,3-ジクロロベンジジン、4,4-ジアミノジフェニルスルフィド、3,3-ジアミノジフェニルスルフォン、1,5-ジアミノナフタレン、m-フェニレンジアミン、p-フェニレンジアミン、3,3-ジメチル-4,4-ビフェニルジアミン、ベンジジン、3,3-ジメチルベンジジン、3,3-ジメトキシベンジジン、4,4-ジアミノジフェニルスルフォン、4,4-ジアミノジフェニルスルフィド、及び4,4-ジアミノジフェニルプロパン等の芳香族ジアミンが挙げられる。なお、これらを2種以上使用してもよい。
本発明の組成物中、化合物Xの含有量は、組成物の全固形分に対して、10質量%以上であり、15質量%以上が好ましい。また、上限値としては、例えば、50質量%以下であり、40質量%以下が好ましく、35質量%以下がより好ましい。
本発明の組成物は、エポキシ化合物と反応し得る硬化剤を含むことも好ましい。
硬化剤としては、フェノール化合物及び酸無水物が好ましい。
上記フェノール化合物としては、後述するフェノール化合物が挙げられる。
上記酸無水物としては、例えば、3-メチル-1,2,3,6-テトラヒドロ無水フタル酸、4-メチル-1,2,3,6-テトラヒドロ無水フタル酸、3-メチル-ヘキサヒドロ無水フタル酸、及び4-メチル-ヘキサヒドロ無水フタル酸等が挙げられる。
硬化剤としては、なかでも、熱伝導材料の熱伝導性がより優れる点から、フェノール化合物がより好ましい。
なお、上記酸無水物は化合物X1にも該当する。つまり、化合物X1の酸無水物基を1個以上有する化合物が、硬化剤としての機能を有していてもよい。本発明の組成物は、化合物X1として酸無水物基を1個以上有する化合物を含む場合、フェノール化合物を硬化剤として含むのが好ましい。
なお、上記官能基含有量は、硬化剤1gが有する、上記官能基の数を意図する。
本発明の組成物が硬化剤を含む場合、硬化剤の含有量は、組成物の全固形分に対して、1.0質量%以上が好ましい。なお、上限値は特に制限されないが、25.0質量%以下が好ましい。
フェノール化合物は、フェノール性水酸基を1個以上(好ましくは2個以上、より好ましくは3個以上)有する化合物である。
熱伝導性がより優れる点から、フェノール化合物としては、一般式(P1)で表される化合物、及び一般式(P2)で表される化合物からなる群から選択される1種以上であるのが好ましい。
一般式(P1)を以下に示す。
m1は、0~10が好ましく、0~3がより好ましく、0又は1が更に好ましく、1が特に好ましい。
na及びncは、それぞれ独立に、1~4が好ましい。
上記アルキル基は、直鎖状でも分岐鎖状でもよい。上記アルキル基の炭素数は、1~10が好ましい。上記アルキル基は、置換基を有していても有していなくてもよい。
上記アルコキシ基におけるアルキル基部分、及び上記アルコキシカルボニル基におけるアルキル基部分は、上記アルキル基と同様である。
R1及びR6は、それぞれ独立に、水素原子又はハロゲン原子が好ましく、水素原子又は塩素原子がより好ましく、水素原子が更に好ましい。
R7が複数存在する場合、複数存在するR7は、それぞれ同一でも異なっていてもよい。
R7が複数存在する場合、複数存在するR7のうち、少なくとも1個のR7が水酸基を表すのも好ましい。
Lx2は、単結合、-C(R4)(R5)-、又は-CO-を表し、-C(R4)(R5)-、又は-CO-が好ましい。
R2~R5及びR8~R11は、それぞれ独立に、水素原子又は置換基を表す。
上記置換基は、それぞれ独立に、水酸基、フェニル基、ハロゲン原子、カルボン酸基、ボロン酸基、アルデヒド基、アルキル基、アルコキシ基、又はアルコキシカルボニル基が好ましく、水酸基、ハロゲン原子、カルボン酸基、ボロン酸基、アルデヒド基、アルキル基、アルコキシ基、又はアルコキシカルボニル基がより好ましい。
上記アルキル基は、直鎖状でも分岐鎖状でもよい。上記アルキル基の炭素数は、1~10が好ましい。上記アルキル基は、置換基を有していても有していなくてもよい。
上記アルコキシ基におけるアルキル基部分、及び上記アルコキシカルボニル基におけるアルキル基部分は、上記アルキル基と同様である。
上記フェニル基は、置換基を有していても有していなくてもよく、置換基を有する場合は1~3個の水酸基を有するのがより好ましい。
R2~R5は、それぞれ独立に、水素原子又は水酸基が好ましく、水素原子がより好ましい。
R8~R11は、それぞれ独立に、水素原子又はフェニル基が好ましい。なお、上記フェニル基は、1~3個の水酸基を有していることがより好ましい。
上記Phは置換基を有していてもよいフェニル基を表す。
なお、一般式(P1)中に、R4が複数存在する場合、複数存在するR4は、それぞれ同一でも異なっていてもよい。R5が複数存在する場合、複数存在するR5は、それぞれ同一でも異なっていてもよい。
Ar1及びAr2は、それぞれ独立に、ベンゼン環基が好ましい。
上記アルキル基は、直鎖状でも分岐鎖状でもよい。上記アルキル基の炭素数は、1~10が好ましい。上記アルキル基は、置換基を有していても有していなくてもよい。
上記アルコキシ基におけるアルキル基部分、及び上記アルコキシカルボニル基におけるアルキル基部分は、上記アルキル基と同様である。
上記フェニル基は、置換基を有していても有していなくてもよい。
Qaは、Qaが結合するベンゼン環基が有してもよい水酸基に対して、パラ位に結合するのが好ましい。
Qaは、水素原子又はアルキル基が好ましい。上記アルキル基はメチル基が好ましい。
なお、上記水酸基含有量は、フェノール化合物1gが有する、水酸基(好ましくはフェノール性水酸基)の数を意図する。
また、フェノール化合物は、水酸基以外にも、エポキシ化合物と重合反応できる活性水素含有基(カルボン酸基等)を有していてもよい。フェノール化合物の活性水素の含有量(水酸基及びカルボン酸基等における水素原子の合計含有量)の下限値は、3.0mmol/g以上が好ましく、7.0mmol/g以上がより好ましい。上限値は、25.0mmol/g以下が好ましく、20.0mmol/g以下がより好ましい。
なお、上記活性水素の含有量は、フェノール化合物1gが有する、活性水素原子の数を意図する。
本発明の組成物がフェノール化合物を含む場合、フェノール化合物の含有量は、組成物の全固形分に対して、1.0質量%以上が好ましく、3.0~25.0質量%がより好ましく、5.0~20.0質量%が更に好ましい。
なお、組成物における、エポキシ化合物の含有量とフェノール化合物の含有量との比は、既述の通りである。
本発明の組成物は、熱伝導材料の熱伝導性がより優れる点から、更に表面修飾剤を含んでいてもよい。
表面修飾剤は、上述の無機物を表面修飾する成分である。
本明細書において、「表面修飾」とは無機物の表面の少なくとも一部に有機物が吸着している状態を意味する。吸着の形態は特に限定されず、結合している状態であればよい。すなわち、表面修飾は、有機物の一部が脱離して得られる有機基が無機物表面に結合している状態も含む。結合は、共有結合、配位結合、イオン結合、水素結合、ファンデルワールス結合、及び金属結合等、いずれの結合であってもよい。表面修飾は、表面の少なくとも一部に単分子膜を形成するようになされていてもよい。単分子膜は、有機分子の化学吸着によって形成される単層膜であり、Self-AssembledMonoLayer(SAM)として知られている。なお、本明細書において、表面修飾は、無機物の表面の一部のみであっても、全体であってもよい。本明細書において、「表面修飾無機物」は、表面修飾剤により表面修飾されている無機物、すなわち無機物の表面に有機物が吸着している物質を意味する。
つまり、本発明の組成物において、無機物は、表面修飾剤と共同して、表面修飾無機物(好ましくは表面修飾無機窒化物及び/又は表面修飾無機酸化物)を構成していてもよい。
表面修飾剤としては、例えば、以下に説明する表面修飾剤Aが好ましい。なお、表面修飾剤Aは、縮環骨格を有する表面修飾剤である。
表面修飾剤Aは、下記条件1及び条件2を満たす。
・条件1:以下に示す官能基群Pから選ばれる官能基(以下「特定官能基A」ともいう)を有する。
ボロン酸基(-B(OH)2)、アルデヒド基(-CHO)、イソシアネート基(-N=C=O)、イソチオシアネート基(-N=C=S)、シアネート基(-O-CN)、アシルアジド基、コハク酸イミド基、スルホニルクロリド基(-SO2Cl)、カルボン酸クロリド基(-COCl)、オニウム基、カーボネート基(-O-CO-O-)、アリールハライド基、カルボジイミド基(-N=C=N-)、酸無水物基(-CO-O-CO-、又は無水マレイン酸、無水フタル酸、無水ピロメリット酸、及び無水トリメリット酸等の1価の酸無水物基)、カルボン酸基(-COOH)、ホスホン酸基(-PO(OH)2)、ホスフィン酸基(-HPO(OH))、リン酸基(-OP(=O)(OH)2)、リン酸エステル基(-OP(=O)(ORB)2)、スルホン酸基(-SO3H)、ハロゲン化アルキル基、ニトリル基(-CN)、ニトロ基(-NO2)、エステル基(-CO-O-又は-O-CO-)、カルボニル基(-CO-)、イミドエステル基(-C(=NRC)-O-又は-O-C(=NRC)-)、アルコキシシリル基、アクリル基(-OCOCH2=CH2)、メタクリル基(-OCOCH(CH3)=CH2)、オキセタニル基、ビニル基(-CH=CH2)、アルキニル基(アルキンから水素原子を一つ除いた基。例えば、エチニル基、及びプロパ-2-イン-1-イル基等が含まれる。)、マレイミド基、チオール基(-SH)、水酸基(-OH)、ハロゲン原子(F原子、Cl原子、Br原子、及びI原子)、及びアミノ基からなる群より選ばれる官能基。
オニウム塩構造としては特に限定されないが、例えば、アンモニウム塩構造、ピリジニウム塩構造、イミダゾリウム塩構造、ピロリジニウム塩構造、ピペリジニウム塩構造、トリエチレンジアミン塩構造、ホスホニウム塩構造、スルホニウム塩構造、及びチオピリリウム塩構造等が挙げられる。なお、カウンターとなるアニオンの種類は特に限定されず、公知のアニオンが用いられる。アニオンの価数も特に限定されず、例えば、1~3価が挙げられ、1~2価が好ましい。
オニウム基としては、なかでも、下記一般式(A1)で表されるアンモニウム塩構造を有する基が好ましい。
なお、イミドエステル基は、イミン窒素の化学結合に関与しない電子対が他の陽イオン(例えば、水素イオン)と配位結合してオニウム塩構造となっていてもよい。
一般式(A2)中、RDは、それぞれ独立して、アルキル基(直鎖状、分岐鎖状及び環状のいずれも含む。)を表す。*は、結合位置を表す。
RDで表されるアルキル基としては、例えば、炭素数1~10のアルキル基が挙げられ、炭素数1~6が好ましく、炭素数1~3がより好ましい。
具体的には、トリメチトキシシリル基及びトリエトキシシリル基等が挙げられる。
なお、アルキル基は、更に置換基(例えば、置換基群Y)を有していてもよい。
芳香族炭化水素環としては、例えば、シクロペンタジエニル環及びベンゼン環等が挙げられる。
芳香族複素環としては、例えば、チオフェン環、チアゾール環、イミダゾール環、ピリジン環、ピリダジン環、ピリミジン環、ピラジン環、及びトリアジン環が挙げられる。
芳香族炭化水素環を2環以上含む縮環構造としては、具体的に、ビフェニレン、インダセン、アセナフチレン、フルオレン、フェナレン、フェナントレン、アントラセン、フルオランテン、アセフェナンスリレン、アセアンスリレン、ピレン、クリセン、テトラセン、プレイアデン、ピセン、ペリレン、ペンタフェン、ペンタセン、テトラフェニレン、ヘキサフェン、及びトリフェニレンからなる群より選ばれる縮合環からなる縮合構造が好ましく、本発明の効果により優れる点で、上記のうち、ベンゼン環を2環以上含む縮合環からなる縮合構造がより好ましく、ベンゼン環を3環以上含む縮合環からなる縮合構造が更に好ましく、ピレン又はペリレンからなる縮合構造が特に好ましい。
以下、一般式(V1)で表される化合物及び一般式(V2)で表される化合物についてそれぞれ説明する。
(一般式(V1)で表される化合物)
なお、上記縮合構造は、特定官能基A以外に、更に置換基(例えば、置換基群Y)を有していてもよい。
言い換えると、nが1である場合には、上記Yは、下記一般式(B1)で表される1価の基、下記一般式(B2)で表される1価の基、又は下記一般式(B4)で表される1価の基を表す。
nが2以上の整数を表す場合には、上記Yは、下記一般式(B1)で表される1価の基、下記一般式(B2)で表される1価の基、若しくは下記一般式(B4)で表される1価の基を表すか、又は複数のYが結合してなる下記一般式(B3)で表される2価の基を表す。なお、nが2以上の場合、複数あるYはそれぞれ同じでも、異なっていてもよい。
なお、Yが、下記一般式(B3)で表される2価の基を表す場合、一般式(V1)で表される化合物は、下記一般式(V3)で表される。
一般式(B1)中、L1は、単結合又は2価の連結基を表す。
2価の連結基としては特に限定されないが、例えば、-O-、-S-、-NRF-(RFは、水素原子、又はアルキル基を表す。)、2価の炭化水素基(例えば、アルキレン基、アルケニレン基(例:-CH=CH-)、アルキニレン基(例:-C≡C-)、及びアリーレン基)、上述した官能基群P中の2価の有機基(カーボネート基(-O-CO-O-)、カルボジイミド基(-N=C=N-)、酸無水物基(-CO-O-CO-)、エステル基(-CO-O-又は-O-CO-)、カルボニル基(-CO-)、イミドエステル基(-C(=NRC)-O-又は-O-C(=NRC)-))、又はこれらを組み合わせた基が挙げられる。
上記組み合わせた基としては、例えば、-(2価の炭化水素基)-X111-、-X111-(2価の炭化水素基)-、-(2価の炭化水素基)-X111-(2価の炭化水素基)-、-X111-(2価の炭化水素基)-X111-(2価の炭化水素基)-、又は-(2価の炭化水素基)-X111-(2価の炭化水素基)-X111-等が挙げられる。なお、-X111-は、-O-、-S-、-NRF-、上述した官能基群P中の2価の有機基、又はこれらを組み合わせた基である。上記組み合わせた基の総炭素数は、例えば、1~20であり、1~12が好ましい。
*1は、上記Xとの結合位置を表す。
一般式(B2)中、L2は、上述した官能基群P中の2価の有機基(カーボネート基(-O-CO-O-)、カルボジイミド基(-N=C=N-)、酸無水物基(-CO-O-CO-)、エステル基(-CO-O-又は-O-CO-)、カルボニル基(-CO-)、又はイミドエステル基(-C(=NRC)-O-又は-O-C(=NRC)-))を含む2価の連結基を表す。
上記L2としては、例えば、上述した官能基群P中の2価の有機基、又は上述した官能基群P中の2価の有機基と、-O-、-S-、-NRF-(RFは、水素原子、又はアルキル基を表す。)、及び2価の炭化水素基(例えば、アルキレン基、アルケニレン基(例:-CH=CH-)、アルキニレン基(例:-C≡C-)、及びアリーレン基)からなる群より選ばれる連結基と、を組み合わせた基が挙げられる。
上記組み合わせた基としては、例えば、-(2価の炭化水素基)-X112-等が挙げられる。なお、-X112-は、上述した官能基群P中の2価の有機基、又は上述した官能基群P中の2価の有機基と、-O-、-S-、及び-NRF-から選ばれる2価の基とを組み合わせた基である。上記組み合わせた基の総炭素数は、例えば、1~20であり、1~12が好ましい。
*2は、上記Xとの結合位置を表す。
一般式(B3)中、L3は、上述した官能基群P中の2価の有機基(カーボネート基(-O-CO-O-)、カルボジイミド基(-N=C=N-)、酸無水物基(-CO-O-CO-)、エステル基(-CO-O-又は-O-CO-)、カルボニル基(-CO-)、又はイミドエステル基(-C(=NRC)-O-又は-O-C(=NRC)-))を含む2価の連結基を表す。
上記L3としては、例えば、上述した官能基群P中の2価の有機基、又は上述した官能基群P中の2価の有機基と、-O-、-S-、-NRF-(RFは、水素原子、又はアルキル基を表す。)、及び2価の炭化水素基(例えば、アルキレン基、アルケニレン基(例:-CH=CH-)、アルキニレン基(例:-C≡C-)、及びアリーレン基)からなる群より選ばれる連結基と、を組み合わせた基が挙げられる。
上記組み合わせた基としては、例えば、-(2価の炭化水素基)-X113-(2価の炭化水素基)-、-(2価の炭化水素基)-X113-、-X113-(2価の炭化水素基)-、及び-X113-(2価の炭化水素基)-X113-等が挙げられる。なお、-X113-は、上述した官能基群P中の2価の有機基、又は上述した官能基群P中の2価の有機基と、-O-、-S-、及び-NRF-から選ばれる2価の基とを組み合わせた基である。上記組み合わせた基の総炭素数は、例えば、1~20であり、1~12が好ましい。
*31及び*32は、上記Xとの結合位置を表す。つまり、上記L3は、上記Xで表される縮環構造上の異なる2つの炭素とともに環を形成する。
m11は2以上の整数を表す。m11の上限値としては特に制限されないが、例えば、100以下であり、30以下が好ましく、20以下がより好ましく、15以下が更に好ましい。m11の下限値としては特に制限されないが、4以上が好ましい。
L4で表される連結基としては特に制限されないが、例えば、m11+1価の芳香族炭化水素環又は下記一般式(M1)で表される基が挙げられる。
E221は、置換基を表す。E221で表される置換基としては、置換基群Yで例示された基が挙げられる。
m221は、2~5の整数を表す。m221としては、なかでも2又は3が好ましい。
m222は、0~3の整数を表す。
但し、m221+m222は、2~5の整数を表す。
*41は、上記Xとの結合位置を表す。
*42は、上記P4との結合位置を表す。
E222及びE223は、それぞれ独立に、置換基を表す。E222及びE223で表される置換基としては、置換基群Yで例示された基が挙げられる。
m223は、1~5の整数を表す。m223としては、なかでも2又は3が好ましい。
m224は、0~3の整数を表す。
m225は、0~4整数を表す。
m226は、2~5の整数を表す。m226としては、なかでも2又は3が好ましい。
但し、m224+m226は、2~5の整数を表す。また、m223+m225は、1~5の整数を表す。
*41は、上記Xとの結合位置を表す。
*42は、上記P4との結合位置を表す。
*4は、上記Xとの結合位置を表す。
上記X11は、n11+n12価の有機基(n11、n12は、それぞれ独立して1以上の整数)を表す。n11、n12は、それぞれ独立して、1以上の整数であれば特に限定されない。また、n11+n12の上限は特に限定されないが、15以下の整数であるのが好ましい。なかでも、表面修飾無機物の分散性により優れる点で、2~8が好ましく、2~3がより好ましく、2が更に好ましい。
なお、上記縮合構造は、Y11及びY12以外に、更に置換基(例えば、置換基群Y)を有していてもよい。
また、上記Y12は、下記官能基群Rから選ばれる官能基を含む。下記官能基群Rに挙げられる官能基は、上述した官能基群Pに挙げられる官能基のなかでも、組成物の硬化を促進しやすい機能を有する基に相当する。
ボロン酸基(-B(OH)2)、アルデヒド基(-CHO)、イソシアネート基(-N=C=O)、イソチオシアネート基(-N=C=S)、シアネート基(-O-CN)、アシルアジド基、コハク酸イミド基、スルホニルクロリド基(-SO2Cl)、カルボン酸クロリド基(-COCl)、オニウム基、カーボネート基(-O-CO-O-)、アリールハライド基、カルボジイミド基(-N=C=N-)、酸無水物基(-CO-O-CO-、又は無水マレイン酸、無水フタル酸、無水ピロメリット酸、及び無水トリメリット酸等の1価の酸無水物基)、ホスホン酸基(-PO(OH)2)、ホスフィン酸基(-HPO(OH))、リン酸基(-OP(=O)(OH)2)、リン酸エステル基(-OP(=O)(ORB)2)、スルホン酸基(-SO3H)、ハロゲン化アルキル基、ニトリル基(-CN)、ニトロ基(-NO2)、エステル基(-CO-O-又は-O-CO-)、カルボニル基(-CO-)、イミドエステル基(-C(=NRC)-O-又は-O-C(=NRC)-)、及びハロゲン原子(フッ素原子、塩素原子、臭素原子、及びヨウ素原子)からなる群より選ばれる官能基。
カルボン酸基(-COOH)、アルコキシシリル基、アクリル基(-OCOCH2=CH2)、メタクリル基(-OCOCH(CH3)=CH2)、オキセタニル基、ビニル基(-CH=CH2)、アルキニル基(アルキンから水素原子を一つ除いた基。例えば、エチニル基、及びプロパ-2-イン-1-イル基等が含まれる。)、マレイミド基、チオール基(-SH)、水酸基(-OH)、及びアミノ基からなる群より選ばれる官能基。
言い換えると、n11が1である場合には、上記Y11は、下記一般式(C1)で表される1価の基又は下記一般式(C2)で表される1価の基を表す。n11が2以上の整数を表す場合には、上記Y11は、下記一般式(C1)で表される1価の基若しくは下記一般式(C2)で表される1価の基を表すか、又は複数のY11が結合してなる下記一般式(C3)で表される2価の基を表す。なお、n11が2以上の場合、複数あるY11はそれぞれ同じでも、異なっていてもよい。
一般式(C1)中、M1は、単結合又は2価の連結基を表す。M1で表される2価の連結基としては、上述したL1と同義であり、また、好ましい態様も同じである。
上記Q1は、上述する官能基群Q中の1価の有機基(ボロン酸基(-B(OH)2)、アルデヒド基(-CHO)、イソシアネート基(-N=C=O)、イソチオシアネート基(-N=C=S)、シアネート基(-O-CN)、アシルアジド基、コハク酸イミド基、スルホニルクロリド基(-SO2Cl)、カルボン酸クロリド基(-COCl)、オニウム基、アリールハライド基、酸無水物基(無水マレイン酸、無水フタル酸、無水ピロメリット酸、及び無水トリメリット酸等の1価の酸無水物基が挙げられる。)、ホスホン酸基(-PO(OH)2)、ホスフィン酸基(-HPO(OH))、リン酸基(-OP(=O)(OH)2)、リン酸エステル基(-OP(=O)(ORB)2)、スルホン酸基(-SO3H)、ハロゲン化アルキル基、ニトリル基(-CN)、ニトロ基(-NO2)、又はハロゲン原子(フッ素原子、塩素原子、臭素原子、及びヨウ素原子)を表す。*1は、上記X11との結合位置を表す。
一般式(B2)中、M2は、上述したL2と同義であり、また、好ましい態様も同じである。上記Q2は、1価の有機基を表す。Q2で表される1価の連結基としては、上述したP2と同義であり、また、好ましい態様も同じである。*2は、上記X11との結合位置を表す。
一般式(B3)中、M3は、上述したL3と同義であり、また、好ましい態様も同じである。*31及び*32は、上記X11との結合位置を表す。つまり、上記M3は、上記X11で表される縮環構造上の異なる2つの炭素とともに環を形成する。
一般式(D1):*1-W1-R1
一般式(D1)中、W1は、単結合又は2価の連結基を表す。R1は、カルボン酸基、アルコキシシリル基、アクリル基、メタクリル基、オキセタニル基、ビニル基、アルキニル基、マレイミド基、チオール基、水酸基、又はアミノ基を表す。*1は、上記X11との結合位置を表す。なお、上記R1は、上述した官能基群R中に挙げた官能基を表す。
W1で表される2価の連結基としては、上述したL1と同義であり、また、好ましい態様も同じである。
*1は、上記X11との結合位置を表す。
m21は、2以上の整数を表す。m21の上限値としては特に制限されないが、例えば、100以下であり、30以下が好ましく、20以下がより好ましく、15以下が更に好ましい。m21の下限値としては特に制限されないが、4以上が好ましい。
R2は、カルボン酸基、アルコキシシリル基、アクリル基、メタクリル基、オキセタニル基、ビニル基、アルキニル基、マレイミド基、チオール基、水酸基、又はアミノ基を表す。なお、上記R2は、上述した官能基群R中に挙げた官能基を表す。
W2で表されるm21+1価の連結基としては、上述したL4と同義であり、また、好ましい態様も同じである。
*2は、上記X11との結合位置を表す。
また、表面修飾剤は、以下に説明する、表面修飾剤Bであるのも好ましい。
表面修飾剤Bは、下記一般式(W1)で表される化合物である。
上記ヘテロ環基としては、特に限定されないが、例えば、脂肪族ヘテロ環基及び芳香族ヘテロ環基が挙げられる。なお、脂肪族ヘテロ環基としては、5員環基、6員環基、若しくは、7員環基、又はその縮合環基が挙げられる。また、芳香族ヘテロ環基としては、5員環基、6員環基、若しくは、7員環基、又はその縮合環基が挙げられる。
なお、上記縮合環基においては、ベンゼン環基等のヘテロ環基以外の環基が含まれていてもよい。
上記脂肪族ヘテロ環基の具体例としては、特に限定されないが、例えば、オキソラン環基、オキサン環基、ピぺリジン環基、及びピペラジン環基等が挙げられる。
上記芳香族ヘテロ環基の具体例としては特に限定されないが、フラン環基、チオフェン環基、ピロール環基、オキサゾール環基、イソオキサゾール環基、オキサジアゾール環基、チアゾール環基、イソチアゾール環基、チアジアゾール環基、イミダゾール環基、ピラゾール環基、トリアゾール環基、フラザン環基、テトラゾール環基、ピリジン環基、ピリダジン環基、ピリミジン環基、ピラジン環基、トリアジン環基、テトラジン環基、ベンゾフラン環基、イソベンゾフラン環基、ベンゾチオフェン環基、インドール環基、インドリン環基、イソインドール環基、ベンゾオキサゾール環基、ベンゾチアゾール環基、インダゾール環基、ベンゾイミダゾール環基、キノリン環基、イソキノリン環基、シンノリン環基、フタラジン環基、キナゾリン環基、キノキサリン環基、ジベンゾフラン環基、ジベンゾチオフェン環基、カルバゾール環基、アクリジン環基、フェナントリジン環基、フェナントロリン環基、フェナジン環基、ナフチリジン環基、プリン環基、及びプテリジン環基等が挙げられる。
Xで表されるヘテロ環基は、芳香族ヘテロ環基であるのが好ましい。
なかでも、Xは、ベンゼン環基又はトリアジン環基であるのが好ましく、トリアジン環基がより好ましい。
Xが置換基を有する場合、置換基は後述する特定官能基Bを含むのが好ましい。
一般式(W1)中、nは3~6の整数を表し、Xには、[-(L1)m-Z]で表される基がn個結合している。
複数存在し得るL1は、それぞれ独立に、置換基を有してもよいアリーレン基、エステル基(-CO-O-又は-O-CO-)、エーテル基(-O-)、チオエステル基(-SO-O-又は-O-SO-)、チオエーテル基(-S-)、カルボニル基(-CO-)、-NRN-、アゾ基(-N=N-)、又は置換基を有してもよい不飽和炭化水素基を表す。
なお、RNは、水素原子又は置換基を有していてもよい炭素数1~10の有機基を表す。
上記アリーレン基がフェニレン基の場合、隣接する基(X、L1、及びZのうちの2個の基で、2個の基が共にL1の場合を含む)と結合する位置に特に制限はなく、オルト位、メタ位、及びパラ位のいずれの位置で結合していてもよく、パラ位で結合しているのが好ましい。上記アリーレン基は置換基を有しても有さなくてもよく、有さないのが好ましい。上記アリーレン基が置換基を有する場合、置換基は後述する特定官能基Bを含むのが好ましい。
L1がエステル基の場合、エステル基中の炭素原子はXの側に存在するのが好ましい。L1がチオエステル基の場合、チオエステル基中の硫黄原子はXの側に存在するのが好ましい。
L1で表される不飽和炭化水素基は、直鎖状でも分岐鎖状でもよく、環状構造を有してもよい。不飽和炭化水素基の炭素数は、2~10が好ましく、2~5がより好ましく、2~3が更に好ましく、2が特に好ましい。ただし、上記炭素数に、上記不飽和炭化水素基が有し得る置換基に含まれる炭素原子の数は含まない。上記不飽和炭化水素基が有する不飽和結合は、二重結合(-C=C-)でも、三重結合(-C≡C-)でもよい。上記不飽和炭化水素基は置換基を有しても有さなくてもよく、有さないのが好ましい。上記不飽和炭化水素基が置換基を有する場合、置換基は特定官能基Bを含むのが好ましい。
L1で表される-NRN-のRNが、置換基を有していてもよい炭素数1~10の有機基である場合、RNは置換基を有していてもよい炭素数1~10アルキル基であるのが好ましく、置換基を有していてもよい炭素数1~5のアルキル基であるのが好ましく、置換基を有していてもよい炭素数1~3のアルキル基であるのが好ましい。上記アルキル基は、直鎖状でも分岐鎖状でもよく、環状構造を有してもよい。RNは水素原子が好ましい。
mが0の場合、ZはXと直接結合する。
mが1の場合、L1は、置換基を有してもよいアリーレン基、エステル基、エーテル基、チオエステル基、チオエーテル基、カルボニル基、-NRN-、アゾ基、又は置換基を有してもよい不飽和炭化水素基であるのが好ましく、置換基を有してもよいアリーレン基、エステル基、エーテル基、カルボニル基、又は置換基を有してもよい不飽和炭化水素基であるのがより好ましく、エステル基、エーテル基、カルボニル基、又は置換基を有してもよい不飽和炭化水素基であるのが更に好ましい。
mが2の場合、[-(L1)m-Z]は[-L1-L1-Z]であり、Xと結合するL1は、置換基を有してもよいアリーレン基であるのが好ましい。この場合、Zと結合するL1は、エステル基、エーテル基、チオエステル基、チオエーテル基、カルボニル基、-NRN-、アゾ基、又は置換基を有してもよい不飽和炭化水素基であるのが好ましく、エステル基、又は置換基を有してもよい不飽和炭化水素基であるのがより好ましい。
mが2よりも大きい場合、[-(L1)m-Z]中に複数存在するL1は同一でも異なっていてもよいが、互いに結合するL1同士は異なっているのが好ましい。
一般式(Lq) -La-
Zで表されるアリール基の炭素数は、6~20が好ましく、6~14がより好ましく、6が更に好ましい。アリール基としては、例えば、フェニル基、ナフチル基、及びアントラセニル基等が挙げられる。
Zで表されるヘテロ環基としては、上述のXがなり得るヘテロ環基が同様に挙げられる。また、Zで表されるヘテロ環基は芳香族性を示すのが好ましい。
なかでも、Zは、アリール基であるのが好ましく、フェニル基又はアントラセニル基であるのがより好ましく、フェニル基であるのが更に好ましい。
Zは、置換基を有するのも好ましく、上記置換基が後述する特定官能基Bを含むのがより好ましい。1個のZが有する置換基の数は、0~5が好ましく、0~2がより好ましく、1~2が更に好ましい。
複数存在するZのうち少なくとも1個が、特定官能基Bを含む置換基を有するのが好ましい。
表面修飾剤Bは、複数存在するZの置換基に含まれる特定官能基Bを、合計で、1以上有するのが好ましく、2以上有するのがより好ましく、3以上有するのが更に好ましい。
表面修飾剤Bが有する、複数存在するZの置換基に含まれる特定官能基Bの合計数の上限に特に制限はないが、15以下が好ましく、10以下がより好ましく、8以下が更に好ましい。
つまり、一般式(W1)中、複数存在するmは同一でも異なっていてもよく、L1が複数存在する場合において複数存在するL1は同一でも異なっていてもよく、複数存在するZは同一でも異なっていてもよい。
複数存在するmは、いずれも同一であるのも好ましい。また、複数存在するmが、いずれも1以上の整数を表すのが好ましく、いずれも2以上の整数を表すのも好ましい。
複数存在する[-(L1)m-Z]は、Zが有する置換基以外いずれの構成も同一であるのも好ましく、Zが有する置換基も含めていずれの構成も同一であるのも好ましい。
nは、3又は6であるのが好ましい。
[-(L1)m-Z]中に、(L1)mでもZでもあり得る基が存在する場合、その基は(L1)mであるとする。例えば、[-(L1)m-Z]が、[-ベンゼン環基-ベンゼン環基-ハロゲン原子]である場合、左側のベンゼン環基は(L1)mであって、Zではない。より具体的には、上記の場合、「m=1、L1はフェニレン基(アリーレン基)、かつ、Zは置換基としてはハロゲン原子を有するフェニル基(アリール基)」であって、「m=0、かつ、Zは置換基としてアリールハライド基を有するフェニル基(アリール基)」ではない。
また、一般式(W1)で表される表面修飾剤Bが、ベンゼン環基とトリアジン環基とを合計4個以上有するのも好ましい。この場合、例えば、Xがトリアジン環基であるのも好ましい。
表面修飾剤Bは、特定官能基Bを1個以上有するのが好ましく、2個以上有するのがより好ましい。
特定官能基Bとは、ボロン酸基、アルデヒド基、水酸基、カルボン酸基、イソシアネート基、イソチオシアネート基、シアネート基、アシルアジド基、コハク酸イミド基、スルホニルクロリド基、カルボン酸クロリド基、オニウム基、カーボネート基、アリールハライド基、カルボジイミド基、酸無水物基(1価の酸無水物基)、ホスホン酸基、ホスフィン酸基、リン酸基、リン酸エステル基、スルホン酸基、ハロゲン原子、ハロゲン化アルキル基、ニトリル基、ニトロ基、イミドエステル基、アルコキシカルボニル基、アルコキシシリル基、アクリロイル基、メタクリロイル基、オキセタニル基、ビニル基、アルキニル基、マレイミド基、チオール基、アミノ基、及びシリル基からなる群より選ばれる基である。
なかでも、特定官能基Bとしては、水酸基、アミノ基、酸無水物基、チオール基、カルボン酸基、アクリロイル基、メタクリロイル基、又はビニル基が好ましい。
上記アルコキシカルボニル基としては、-CO-O-Rfで表される基であれば特に限定されない。上記Rfは、アルキル基(直鎖状、分岐鎖状、及び環状のいずれも含む。)を表す。
Rfで表されるアルキル基の炭素数としては、例えば、1~10が挙げられ、1~6が好ましく、1~3がより好ましい。
また、特定官能基Bのうち、特定官能基Aと重複する官能基は、特定官能基Aに関して説明した通りである。
特定官能基Bが存在する位置は特に制限されず、例えば、特定官能基Bは一般式(W1)中のXの置換基に含まれていてもよく、アリーレン基又は不飽和炭化水素基である場合のL1の置換基に含まれていてもよく、Zの置換基に含まれていてもよい。
なお、特定官能基Bは、特定官能基B以外の基と結合して、1個の置換基を形成してもよい。
また、特定官能基Bは1個の置換基中に複数含まれていてもよい。
一般式(Ry) -Ly1-Qy
一般式(Rz) -Lz1-Sz-(Lz2-Qz)s
2価の連結基としては特に制限されないが、例えば、-O-、-CO-、-NH-、2価の炭化水素基からなる群より選ばれるいずれか1種又は2種以上を組み合わせた2価の連結基を表す。
上記2価の炭化水素基は、更に置換基(例えば、置換基群Yで例示された基)を有していてもよい。
上記2価の炭化水素基としては、例えば、アルキレン基、アルケニレン基(例:-CH=CH-)、アルキニレン基(例:-C≡C-)、及びアリーレン基(例:フェニレン基)が挙げられる。上記アルキレン基としては、直鎖状、分岐鎖状、環状のいずれであってもよいが直鎖状が好ましい。また、その炭素数は、1~10が好ましく、1~6がより好ましく、1~4が更に好ましい。
Lx1としては、単結合、-AL-、-O-、-O-CO-、-O-AL-、-AL-CO-、-O-AL-O-、-O-CO-AL-、-CO-O-AL-、-AL-NH-CO-、-O-AL-O-AL-、-CO-O-AL-O-、又は-O-AL-O-Ar-が好ましい。
上記ALは、炭素数1~10のアルキレン基(炭素数は、1~6が好ましく、1~4がより好ましい。)を表す。
上記Arは、炭素数6~20アリーレン基(フェニレン基が好ましい)を表す。なお、Lx1が「-O-AL-O-Ar-」である場合、「-O-AL-O-Ar-」中のArがQxと結合する。
Qxは、1価の特定官能基Bを表す。具体的には、アルデヒド基、水酸基、カルボン酸基、イソシアネート基、イソチオシアネート基、シアネート基、アシルアジド基、コハク酸イミド基、スルホニルクロリド基、カルボン酸クロリド基、オニウム基、アリールハライド基、ホスホン酸基、ホスフィン酸基、リン酸基、スルホン酸基、リン酸エステル基、ハロゲン原子、酸無水物基、ハロゲン化アルキル基、ニトリル基、ニトロ基、アルコキシカルボニル基、アルコキシシリル基、アクリロイル基、メタクリロイル基、オキセタニル基、ビニル基、アルキニル基、マレイミド基、チオール基、アミノ基、エポキシ基、及びシリル基が挙げられる。
上記Qyは、1価の有機基を表す。上記Qyで表される1価の有機基としては、特に限定されず、例えば、アルキル基が挙げられる。アルキル基中の炭素数は、例えば1~10であり、1~6が好ましく、1~3がより好ましい。
2価の連結基としては特に制限されないが、例えば、-O-、-CO-、-NH-、及び2価の炭化水素基からなる群より選ばれるいずれか1種又は2種以上を組み合わせた2価の連結基を表す。
上記2価の炭化水素基は、更に置換基(例えば、置換基群Yで例示された基)を有していてもよい。
上記2価の炭化水素基としては、例えば、アルキレン基、アルケニレン基(例:-CH=CH-)、アルキニレン基(例:-C≡C-)、及びアリーレン基(例:フェニレン基)が挙げられる。上記アルキレン基としては、直鎖状、分岐鎖状、及び環状のいずれであってもよいが直鎖状が好ましい。また、その炭素数は、1~10が好ましく、1~6がより好ましく、1~4が更に好ましい。
Lz2としては、単結合、-AL-、-O-、-O-CO-、-O-AL-、-AL-CO-、-O-AL-O-、-O-CO-AL-、-CO-O-AL-、-AL-NH-CO-、-O-AL-O-AL-、-CO-O-AL-O-、-O-AL-O-Ar-、又は-O-Ar-が好ましい。
上記ALは、炭素数1~10のアルキレン基(炭素数は、1~6が好ましく、1~4がより好ましい。)を表す。
上記Arは、炭素数6~20アリーレン基(フェニレン基が好ましい)を表す。
Szとしては、(s+1)価の芳香環基が好ましい。上記芳香環基は芳香族炭化水素環基でも芳香族ヘテロ環基でもよく、ベンゼン環基又はトリアジン環基が好ましい。
複数存在するQzは、それぞれ独立に、上記Qxが表し得る基を表し、好ましい条件も同様である。
表面修飾剤Bは、下記一般式(W2)で表される化合物であるのが好ましい。
例えば、全てのTが-CRa=であり、かつ、全てのRaが-La-Zである場合、一般式(W2)で表される化合物は6個の-La-Zで表される基を有する。
また、全てのTが-N=である場合、一般式(W2)で表される化合物はトリアジン環を有する。
一般式(W2)で表される化合物としては、一般式(W3)で表される化合物が好ましい。
Arは、それぞれ独立に、アリール基を表す。アリール基の好適態様としては、Zで表されるアリール基が挙げられる。
Rbは、それぞれ独立に、特定官能基Bを含む置換基を表す。特定官能基Bの定義は、上述した通りである。また、特定官能基Bを含む置換基としては、一般式(Rx)で表される基、一般式(Ry)で表される基、又は一般式(Rz)で表される基が好ましい。
pは、それぞれ独立に、0~5の整数を表す。pは、0~2が好ましい。なかでも、一般式(W3)中の3つのpのうち、2つのpが0で、かつ、1つのpが1である態様1、又は3つのpが全て1である態様2が好ましい。
表面修飾剤Bは、公知の方法に従って合成できる。
また、組成物は、(好ましくは、無機物が無機酸化物(酸化アルミニウム等)を含む場合において、)表面修飾剤として有機シラン分子(好ましくはアルコキシシリル基を有する化合物)を含むのも好ましい。上記有機シラン分子としては、表面修飾剤A、表面修飾剤B、及びこれらのいずれにも該当しないその他の表面修飾剤が挙げられる。
上記その他の表面修飾剤である有機シラン分子としては、例えば、3-アミノプロピルトリエトキシシラン、3-(2-アミノエチル)アミノプロピルトリエトキシシラン、3-アミノプロピルトリメトキシシラン、3-(2-アミノエチル)アミノプロピルトリメトキシシラン、N-フェニル-3-アミノプロピルトリメトキシシラン、3-メルカプトトリエトキシシラン、及び3-ウレイドプロピルトリエトキシシランが挙げられる。
組成物が表面修飾剤を含む場合、無機物の含有量に対する、表面修飾剤の含有量の質量比(表面修飾剤の含有量/無機物の含有量)は、0.0001~10が好ましく、0.0001~5がより好ましい。
また、無機窒化物(好ましくは、窒化ホウ素及び/又は窒化アルミニウム)の含有量に対する、表面修飾剤A及び表面修飾剤Bの合計含有量の質量比(表面修飾剤A及び表面修飾剤Bの合計含有量/無機窒化物の含有量)は、0.0001~10が好ましく、0.0001~5がより好ましい。
無機酸化物(好ましくは酸化アルミニウム)の含有量に対する、表面修飾剤としての有機シラン分子(好ましくはその他の表面修飾剤である有機シラン分子)の含有量の質量比(有機シラン分子の含有量/無機酸化物の含有量)は、0.0001~10が好ましく、0.001~5がより好ましい。
本発明の組成物は、更に、硬化促進剤を含んでいてもよい。
硬化促進剤の種類は制限されず、例えば、トリフェニルホスフィン、2-エチル-4-メチルイミダゾール、三フッ化ホウ素アミン錯体、1-ベンジル-2-メチルイミダゾール、及び特開2012-67225号公報の段落0052に記載の化合物が挙げられる。
硬化促進剤は、1種単独で使用してもよく2種以上使用してもよい。
組成物が硬化促進剤を含む場合、エポキシ化合物の含有量に対する、硬化促進剤の含有量の質量比(硬化促進剤の含有量/エポキシ化合物の含有量)は、0.0001~10が好ましく、0.001~5がより好ましい。
本発明の組成物は、重合開始剤を含んでいてもよい。なかでも、本発明の組成物が、アルケニル基、アクリレート基、及びメタクリレート基からなる群より選ばれる特定官能基を含む化合物X1を含む場合、本発明の組成物は、重合開始剤を含むことが好ましい。
重合開始剤としては特に制限されず、公知の重合開始剤を使用できる。重合開始剤としては、例えば、光重合開始剤、及び熱重合開始剤等が挙げられ、光重合開始剤が好ましい。なお、重合開始剤としては、いわゆるラジカル重合開始剤が好ましい。
本発明の組成物が重合開始剤を含む場合、組成物中における重合開始剤の含有量としては特に制限されないが、化合物Xの含有量に対して、0.5~15質量%が好ましく、1.0~10質量%がより好ましく、1.5~8.0質量%が更に好ましい。重合開始剤は、1種を単独で用いても、2種以上を併用してもよい。2種以上の重合開始剤を併用する場合には、合計含有量が上記範囲内であることが好ましい。
本発明の組成物は、更に、分散剤を含んでいてもよい。
組成物が分散剤を含むと、組成物中での無機物の分散性が向上し、より優れた熱伝導率と接着性を実現できる。
分散剤は1種単独で使用してもよく、2種以上を使用してもよい。
組成物が分散剤を含む場合、無機物の含有量に対する、分散剤の含有量の質量比(分散剤の含有量/無機物の含有量)は、0.0001~10が好ましく、0.001~5がより好ましい。
本発明の組成物は、更に、溶媒を含んでいてもよい。
溶媒の種類は特に制限されず、有機溶媒であるのが好ましい。有機溶媒としては、例えば、シクロペンタノン、シクロヘキサノン、酢酸エチル、メチルエチルケトン、ジクロロメタン、及びテトラヒドロフラン等が挙げられる。
組成物が溶媒を含む場合、溶媒の含有量は、組成物の固形分濃度を、20~90質量%とする量が好ましく、30~80質量%とする量がより好ましく、40~80質量%とする量が更に好ましい。
組成物の製造方法は特に制限されず、公知の方法を採用でき、例えば、上述した各種成分を混合して製造できる。混合する際には、各種成分を一括で混合しても、順次混合してもよい。
成分を混合する方法に特に制限はなく、公知の方法を使用できる。混合に使用する混合装置は、液中分散機が好ましく、例えば、自転公転ミキサー、高速回転せん断型撹拌機等の撹拌機、コロイドミル、ロールミル、高圧噴射式分散機、超音波分散機、ビーズミル、及びホモジナイザーが挙げられる。混合装置は1種単独で使用してもよく、2種以上使用してもよい。混合の前後に、及び/又は同時に、脱気処理を行ってもよい。
本発明の組成物を硬化処理して本発明の熱伝導材料が得られる。
組成物の硬化方法は、特に制限されないが、熱硬化反応が好ましい。
熱硬化反応の際の加熱温度は特に制限されない。例えば、50~250℃の範囲で適宜選択すればよい。また、熱硬化反応を行う際には、温度の異なる加熱処理を複数回にわたって実施してもよい。
硬化処理は、フィルム状又はシート状とした組成物について行うのが好ましい。具体的には、例えば、組成物を塗布成膜し硬化反応を行えばよい。
硬化処理を行う際は、基材上に組成物を塗布して塗膜を形成してから硬化させるのが好ましい。この際、基材上に形成した塗膜に、さらに異なる基材を接触させてから硬化処理を行ってもよい。硬化後に得られた硬化物(熱伝導材料)は、基材の一方又は両方と分離してもよいし分離しなくてもよい。
また、硬化処理を行う際に、別々の基材上に組成物を塗布して、それぞれ塗膜を形成し、得られた塗膜同士を接触させた状態で硬化処理を行ってもよい。硬化後に得られた硬化物(熱伝導材料)は、基材の一方又は両方と分離してもよいし分離しなくてもよい。
硬化処理の際には、プレス加工を行ってもよい。プレス加工に使用するプレスに制限はなく、例えば、平板プレスを使用してもよいしロールプレスを使用してもよい。
ロールプレスを使用する場合は、例えば、基材上に塗膜を形成して得た塗膜付き基材を、2本のロールが対向する1対のロールに挟持し、上記1対のロールを回転させて上記塗膜付き基材を通過させながら、上記塗膜付き基材の膜厚方向に圧力を付加するのが好ましい。上記塗膜付き基材は、塗膜の片面にのみ基材が存在していてもよいし、塗膜の両面に基材が存在していてもよい。上記塗膜付き基材は、ロールプレスに1回だけ通過させてもよいし複数回通過させてもよい。
平板プレスによる処理とロールプレスによる処理とは一方のみを実施してもよいし両方を実施してもよい。
硬化反応を含む熱伝導材料の作製については、「高熱伝導性コンポジット材料」(シーエムシー出版、竹澤由高著)を参照できる。
つまり、本発明の熱伝導材料は、熱伝導シートであるのも好ましい。
また、本発明の熱伝導材料の熱伝導性は異方的ではなく等方的であるのが好ましい。
例えば、熱伝導材料の23℃相対湿度65%における体積抵抗率は、1010Ω・cm以上が好ましく、1012Ω・cm以上がより好ましく、1014Ω・cm以上が更に好ましく、1016Ω・cm以上が特に好ましい。上限は特に制限されないが、通常1018Ω・cm以下である。
本発明の熱伝導材料は放熱シート等の放熱材として使用でき、各種デバイスの放熱用途に使用できる。より具体的には、デバイス上に本発明の熱伝導材料を含む熱伝導層を配置して熱伝導層付きデバイスを作製して、デバイスからの発熱を効率的に熱伝導層で放熱できる。
本発明の熱伝導材料は十分な熱伝導性を有するとともに、高い耐熱性を有しているため、パーソナルコンピュータ、一般家電、及び自動車等の様々な電気機器に用いられているパワー半導体デバイスの放熱用途に適している。
更に、本発明の熱伝導材料は、半硬化状態であっても十分な熱伝導性を有するため、各種装置の部材の隙間等の、光硬化のための光を到達させるのが困難な部位に配置する放熱材としても使用できる。また、接着性にも優れるため、熱伝導性を有する接着剤としての使用も可能である。
例えば、シート状の熱伝導材料(熱伝導シート)は、本組成物から形成された層の他の、シート状の支持体と組み合わせられていてもよい。
シート状の支持体としては、プラスチックフィルム、金属フィルム、又はガラス板が挙げられる。プラスチックフィルムの材料としては、例えば、ポリエチレンテレフタレート(PET)等のポリエステル、ポリカーボネート、アクリル樹脂、エポキシ樹脂、ポリウレタン、ポリアミド、ポリオレフィン、セルロース誘導体、及びシリコーンが挙げられる。金属フィルムとしては、銅フィルムが挙げられる。
〔各種成分〕
以下に、実施例及び比較例で使用した各種成分を示す。
<硬化剤>
(フェノール化合物)
以下に、実施例及び比較例で使用したフェノール化合物を示す。
なお、フェノール化合物A-3は、明和化成株式会社製 MEH-7500である。
以下に、実施例及び比較例で使用した酸無水物A-6を示す。なお、実施例14において硬化剤として使用される酸無水物は、化合物Xにも該当する。
「A-6」:3-メチル-1,2,3,6-テトラヒドロ無水フタル酸と4-メチル-1,2,3,6-テトラヒドロ無水フタル酸の混合物(日立化成(株)製「HN-2200」)
以下に、実施例及び比較例で使用したエポキシ化合物を示す。
なお、下記B-3は2種類のエポキシ化合物の混合物である(商品名:エポトートZX-1059、東都化成株式会社製)。
以下に、実施例及び比較例で使用した無機物を示す。
「HP-40 MF100」:凝集状窒化ホウ素(平均粒径:40μm、水島合金鉄製)
「AA-04」:アルミナ(平均粒径:0.5μm、住友化学製)
「AA-18」:アルミナ(平均粒径:20μm、住友化学製)
硬化促進剤として、PPh3(トリフェニルホスフィン)使用した。
以下に、実施例及び比較例で使用した化合物Xを示す。
「X-1」:トリメチロールプロパントリアクリレート(新中村化学工業(株)製「A-TMPT」)
「X-2」:シランカップリング剤(信越化学工業(株)製「KBM-503」)
「X-3」:硬化性シラノール(信越化学工業(株)製「VF-600」)
「X-4」:3-メチル-1,2,3,6-テトラヒドロ無水フタル酸と4-メチル-1,2,3,6-テトラヒドロ無水フタル酸の混合物(日立化成(株)製「HN-2200」)
「X-5」:ノボラック型シアネートエステル樹脂(ハンツマン・ジャパン(株)製「XU371」)
「X-6」:ジアミノジフェニルメタン
「X-7」:トリメチロールプロパントリス(3-メルカプトブチレート)(昭和電工(株)製「TPMB」)
「X-8」:ポリアミック酸構造を有する化合物(3,3’,4,4’-ビフェニルテトラカルボン酸二無水物とp-フェニレンジアミン及び4,4’-ジアミノジフェニルエーテルの混合物(モル比5:5)とからなるポリアミック酸
「X-9」:2-メタクリロイロキシエチルコハク酸(共栄社化学製「ライトエステルHO-MS」)
「X-10」:マレイン酸(東京化成工業社製)
以下に、実施例で使用した表面修飾剤を示す。
溶媒として、シクロペンタノン使用した。
分散剤として、DISPERBYK-106(酸性基を有するポリマー塩)を使用した。
以下に、実施例で使用した表面修飾剤を示す。
「VAm-110」(富士フイルム和光純薬社製、油溶性アゾ重合開始剤)
「AIBN」(アゾビスイソブチロニトリル)
「PBO」(過酸化ベンゾイル)
下記表1に示す組み合わせのエポキシ化合物と硬化剤(フェノール化合物又は酸無水物)とを、当量(エポキシ化合物のエポキシ基の数と、フェノール化合物の水酸基の数又は酸無水物の酸無物基の数とが等しくなる量)で配合した硬化液を調製した。
上記硬化液、溶媒、化合物X、重合開始剤、分散剤、表面修飾剤、及び硬化促進剤の順で混合した後、無機物を添加した。得られた混合物を自転公転ミキサー(THINKY社製、あわとり練太郎ARE-310)で5分間処理して、各実施例又は比較例の組成物(熱伝導材料形成用組成物)を得た。
なお、組成物の固形分濃度は、組成物の粘度がそれぞれ同程度になるように、上記範囲内で組成物ごとに調整した。
硬化促進剤の添加量は、組成物中の硬化促進剤の含有量が、エポキシ化合物の含有量に対して、1質量%となる量とした(表中の「*A」欄)。使用した硬化促進剤の種類を表1に示す。
化合物Xの添加量は、組成物中の化合物Xの含有量が、組成物の全固形分に対して、表1に示す値(質量%)になる量とした。使用した化合物Xの種類を表1に示す。
重合開始剤の添加量は、組成物中の重合開始剤の含有量が、化合物Xの含有量に対して、1質量%となる量とした(表中の「*B」欄)。使用した重合開始剤の種類を表1に示す。
無機物の添加量(全無機物の合計)は、組成物中の無機物の含有量が、組成物の全固形分に対して、表1に示す値(質量%)になる量とした。
分散剤の添加量は、組成物中の分散剤の含有量が、無機物の含有量に対して、0.2質量%となる量とした。
表面修飾剤を使用する場合、表面修飾剤の添加量は、組成物中の表面修飾剤の含有量が、無機窒化物の含有量(HP-40 MF100の添加量)に対して、0.3質量%となる量とした。
表中、硬化剤とエポキシ化合物からなる硬化液の含有量は、組成物の全固形分のうち、無機物、硬化促進剤、化合物X、重合開始剤、分散剤、表面修飾剤を除いた残量(質量%)である。
<熱伝導性>
アプリケーターを用いて、離型処理したポリエステルフィルム(NP-100A パナック社製、膜厚100μm)の離型面上に、調製した組成物を均一に塗布し、120℃で5分間放置して塗膜を得た。
このような塗膜付きポリエステルフィルムを2枚作製し、2枚の塗膜付きポリエステルフィルム同士を塗膜面同士で貼り合せてから、空気下で熱プレス(熱板温度65℃、圧力12MPaで1分間処理)することで半硬化膜を得た。得られた半硬化膜を空気下で熱プレス(熱板温度160℃、圧力12MPaで20分間処理した後、更に、常圧下で180℃90分)で処理して塗膜を硬化し、樹脂シートを得た。樹脂シートの両面にあるポリエステルフィルムを剥がし、平均膜厚200μmの熱伝導性シートを得た。
(1)NETZSCH社製の「LFA467」を用いて、レーザーフラッシュ法で熱伝導性シートの厚み方向の熱拡散率を測定した。
(2)メトラー・トレド社製の天秤「XS204」を用いて、熱伝導性シートの比重をアルキメデス法(「固体比重測定キット」使用)で測定した。
(3)セイコーインスツル社製の「DSC320/6200」を用い、10℃/分の昇温条件の下、25℃における熱伝導性シートの比熱を求めた。
(4)得られた熱拡散率に比重及び比熱を乗じて、熱伝導性シートの熱伝導率を算出した。
測定された熱伝導率を下記基準に照らして区分し、熱伝導性を評価した。
「A+」:13W/m・K以上
「A」: 10W/m・K以上13W/m・K未満
「B」: 8W/m・K以上10W/m・K未満
「C」: 5W/m・K以上8W/m・K未満
「D」: 5W/m・K未満
結果を表1に示す。
上記「熱伝導性」の評価と同様にして作製した熱伝導性シートの、23℃相対湿度65%における体積抵抗値を、ハイレスタMCP-HT450型((株)三菱化学アナリテック製)を用いて測定した。
測定された熱伝導性シート体積抵抗値を下記基準に照らして区分し、絶縁性を評価した。
「A+」: 1016Ω・cm以上
「A」: 1014Ω・cm以上1016Ω・cm未満
「B」: 1012Ω・cm以上1014Ω・cm未満
「C」: 1010Ω・cm以上1012Ω・cm未満
「D」: 1010Ω・cm未満
結果を表1に示す。
アプリケーターを用いて、離型処理したポリエステルフィルム(NP-100A パナック社製、膜厚100μm)の離型面上に、調製した組成物を均一に塗布し、120℃で5分間放置して塗膜を得た。このような塗膜を2枚作製し、この2枚の塗膜を120℃で貼り合せた。次いで、ポリエステルフィルムを剥がして積層体を得た。
次に、得られた積層体を被着体である電解銅箔(厚み:35μm)とアルミ(厚み:800μm)の間に挟み込んで、熱プレス(20MPa、120℃、1分間)により貼り合わせ、半硬化状態のシートを得た。次に、この半硬化状態のシートを熱プレス(5MPa、180℃、5分間)、続く後硬化(180℃、90分間)することにより、シート層(上記積層体から形成される硬化層)と被着体を一体化させた。その後、20mm×70mmのサイズに切り出し、剥離試験用テストピースを作製した。
次いで、上記テストピースを株式会社エー・アンド・デイ製の引張試験装置を用いて、銅箔部分を50mm/minの剥離速度で90°ピール試験を実施し、被着体とシート層との密着度合いを接着力によって評価した。
測定された接着力を下記基準に照らして区分し、接着性を評価した。
「A+」: 5N/cm以上
「A」: 4N/cm以上5N/cm未満
「B」: 3N/cm以上4N/cm未満
「C」: 1N/cm以上3N/cm未満
「D」: 1N/cm未満
以下、表1を示す。
表1中、「硬化剤」欄における「官能基数」は、使用したフェノール化合物の水酸基含有量(mmol/g)又は使用した酸無水物の酸無水物基の含有量(mmol/g)を示す。
「化合物Xの構成」の欄において、「化合物Xの種類」の欄は、使用した化合物Xの構造を示す。具体的には、使用した化合物Xが、アルケニル基、アクリレート基、メタクリレート基、シリル基、酸無水物基、シアネートエステル基、アミノ基、チオール基、及びカルボン酸基からなる群より選ばれる特定官能基を1個以上有する化合物(化合物X1)である場合を「A」として示し、使用した化合物Xが、ポリアミック酸構造を有する化合物(化合物X2)である場合を「B」として示す。また、「特定官能基の種類」の欄は、使用した化合物X1が有する特定官能基の種類を示す。
実施例4と実施例5の対比から、組成物中の化合物Xの含有量が、組成物の全固形分量に対して35質量%以下である場合、得られる熱伝導シートの熱伝導性、絶縁性、及び接着性がより優れることが分かる。
Claims (15)
- エポキシ化合物と、
無機物と、
アルケニル基、アクリレート基、メタクリレート基、シリル基、酸無水物基、シアネートエステル基、アミノ基、チオール基、及びカルボン酸基からなる群より選ばれる官能基を1個以上有するか、又はポリアミック酸構造を有する化合物Xと、を含む熱伝導材料形成用組成物であって、
前記無機物の含有量が、組成物の全固形分に対して、10質量%以上であり、
前記化合物Xの含有量が、組成物の全固形分に対して、10質量%以上である、熱伝導材料形成用組成物。 - さらに、フェノール化合物を含む、請求項1に記載の熱伝導材料形成用組成物。
- 前記フェノール化合物の水酸基含有量が、12.0mmol/g以上である、請求項2に記載の熱伝導材料形成用組成物。
- 前記フェノール化合物の分子量が、400以下である、請求項2又は3に記載の熱伝導材料形成用組成物。
- 前記化合物Xが、アルケニル基、アクリレート基、メタクリレート基、及びシリル基からなる群より選ばれる官能基を1個以上有するか、又はポリアミック酸構造を有する、請求項1~4のいずれか1項に記載の熱伝導材料形成用組成物。
- 前記化合物Xが、直鎖状又は分岐鎖状のオルガノポリシロキサンであって、且つケイ素原子に結合したアルケニル基を2個以上有する、請求項1~5のいずれか1項に記載の熱伝導材料形成用組成物。
- 前記化合物Xの含有量が、組成物の全固形分に対して、15~35質量%である、請求項1~6のいずれか1項に記載の熱伝導材料形成用組成物。
- 前記無機物が、無機窒化物を含む、請求項1~7のいずれか1項に記載の熱伝導材料形成用組成物。
- 前記無機窒化物が、窒化ホウ素を含む、請求項8に記載の熱伝導材料形成用組成物。
- 更に、前記無機物の表面修飾剤を含む、請求項1~9のいずれか1項に記載の熱伝導材料形成用組成物。
- 前記表面修飾剤が、縮環骨格又はトリアジン骨格を有する、請求項10に記載の熱伝導材料形成用組成物。
- 更に、硬化促進剤を含む、請求項1~11のいずれか1項に記載の熱伝導材料形成用組成物。
- 請求項1~12のいずれか1項に記載の熱伝導材料形成用組成物を硬化して得られる、熱伝導材料。
- 請求項13に記載の熱伝導材料からなる、熱伝導シート。
- デバイスと、前記デバイス上に配置された請求項14に記載の熱伝導シートを含む熱伝導層とを有する、熱伝導層付きデバイス。
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CN114269848A (zh) | 2022-04-01 |
CN114269848B (zh) | 2024-07-16 |
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JPWO2021039732A1 (ja) | 2021-03-04 |
US20230099722A1 (en) | 2023-03-30 |
EP4024445A1 (en) | 2022-07-06 |
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