WO2017170367A1 - ポリエーテル系重合体組成物 - Google Patents
ポリエーテル系重合体組成物 Download PDFInfo
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- WO2017170367A1 WO2017170367A1 PCT/JP2017/012336 JP2017012336W WO2017170367A1 WO 2017170367 A1 WO2017170367 A1 WO 2017170367A1 JP 2017012336 W JP2017012336 W JP 2017012336W WO 2017170367 A1 WO2017170367 A1 WO 2017170367A1
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/32—Polymers modified by chemical after-treatment
- C08G65/329—Polymers modified by chemical after-treatment with organic compounds
- C08G65/333—Polymers modified by chemical after-treatment with organic compounds containing nitrogen
- C08G65/33303—Polymers modified by chemical after-treatment with organic compounds containing nitrogen containing amino group
- C08G65/33317—Polymers modified by chemical after-treatment with organic compounds containing nitrogen containing amino group heterocyclic
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- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/04—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers only
- C08G65/22—Cyclic ethers having at least one atom other than carbon and hydrogen outside the ring
- C08G65/24—Epihalohydrins
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
- C08L71/02—Polyalkylene oxides
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
- C09D171/02—Polyalkylene oxides
- C09D171/03—Polyepihalohydrins
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/68—Particle size between 100-1000 nm
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/69—Particle size larger than 1000 nm
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- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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- C08K2003/0806—Silver
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- C08K2003/085—Copper
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C08K2201/005—Additives being defined by their particle size in general
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
Definitions
- the present invention relates to a polyether polymer composition capable of appropriately exhibiting various characteristics of a filler such as high thermal conductivity and high electrical conductivity, and having excellent long-term stability.
- heat-generating electronic components such as semiconductor elements become smaller and have higher output, the amount of heat per unit area generated from the electronic components has become very large.
- cooling is required.
- the exothermic electronic component is cooled by, for example, installing a cooling member such as a metal heat sink near the exothermic electronic component.
- a cooling member such as a metal heat sink
- thermally conductive polymer material in addition to a thermally conductive sheet made of a cured product in which a silicone rubber or the like is filled with a thermally conductive filler, a silicone compound having fluidity is filled with a thermally conductive filler.
- a heat conductive adhesive that is flexible and can be cured by cross-linking, and a fluid heat conductive grease in which a liquid material such as liquid silicone is filled with a heat conductive filler are used.
- a heat conductive adhesive that is flexible and can be cured by cross-linking
- a fluid heat conductive grease in which a liquid material such as liquid silicone is filled with a heat conductive filler are used.
- These are all formed by filling a rubber-like material as a matrix or a liquid material with a heat conductive filler.
- the heat conductive sheet and the heat conductive grease used for this are also required to have better heat dissipation performance.
- these methods are generally used.
- a large amount of heat conduction is performed on the polymer.
- the electrical circuit is an inkjet system.
- Techniques for printing are being studied.
- a conductive paste or conductive ink can be printed on the surface of a target material by an inkjet method or the like, high-fine line continuous printing that forms a fine pattern is possible.
- Such a method for forming a fine pattern can greatly reduce the production cost as compared with a conventional method that needs to undergo an etching process and a photolithography process.
- a composition containing a polymer such as an epoxy resin and a conductive filler such as silver powder is usually used.
- a polymer such as an epoxy resin
- a conductive filler such as silver powder
- the epoxy part is heat-cured to fix the shape of the electric circuit, or when the metal particles melt when heat-cured, self-organize to form a metal joint, and the thermosetting resin surrounds it.
- the present invention has been made in view of such a situation, and can appropriately exhibit various characteristics of the filler such as high thermal conductivity and high electrical conductivity, and has excellent long-term stability. It is an object of the present invention to provide a polyether polymer composition and a grease and paste comprising such a polyether polymer composition.
- the present inventors according to a composition comprising a specific amount of a filler in a polyether polymer consisting of a specific amount of oxirane monomer units, Various properties of the filler, such as high thermal conductivity and high electrical conductivity, can be exhibited appropriately, and after a long period of time, aggregation of the fillers can be effectively suppressed, The present inventors have found that it is excellent in stability and have completed the present invention.
- a polyether polymer composition comprising 50 parts by weight or more of a filler with respect to 100 parts by weight of a polyether polymer comprising 10 to 200 oxirane monomer units.
- the filler is preferably a metal-containing powder, and is at least one selected from a metal powder, a metal oxide powder, and a metal nitride powder. More preferred.
- the polyether polymer composition of the present invention it is preferable that at least a part of the oxirane monomer unit contained in the polyether polymer is an oxirane monomer unit having a cationic group, It is more preferable that the polyether polymer is composed of monomer units represented by the following general formula (1).
- a + represents a cationic group or a cationic group-containing group
- X ⁇ represents an arbitrary counter anion
- R represents a nonionic group
- n represents 1 or more. And is an integer greater than or equal to 0 and satisfies 10 ⁇ n + m ⁇ 200.
- the cationic group is preferably a group comprising a heterocyclic ring containing a cationic nitrogen atom.
- the filler preferably has an average particle diameter of 0.01 ⁇ m or more and less than 50 ⁇ m.
- the polyether polymer composition of the present invention is preferably a polymer composition for heat dissipation.
- the polyether polymer composition of the present invention is preferably a conductive polymer composition.
- the polyether polymer composition of the present invention is preferably in the form of grease or paste.
- the polyether polymer composition of the present invention is a composition comprising 50 parts by weight or more of a filler with respect to 100 parts by weight of a polyether polymer composed of 10 to 200 oxirane monomer units. .
- the polyether polymer constituting the polyether polymer composition of the present invention comprises an oxirane monomer unit, which is a unit obtained by ring-opening polymerization of an oxirane structure portion of a compound containing an oxirane structure.
- oxirane monomer units include alkylene oxide units such as ethylene oxide units, propylene oxide units, and 1,2-butylene oxide units; epichlorohydrin units, epibromohydrin units, epiiodohydrin units, and the like.
- alkylene oxide units such as ethylene oxide units, propylene oxide units, and 1,2-butylene oxide units
- epichlorohydrin units epibromohydrin units, epiiodohydrin units, and the like.
- Epihalohydrin unit alkenyl group-containing oxirane monomer unit such as allyl glycidy
- the polyether polymer used in the present invention may contain two or more kinds of oxirane monomer units.
- the distribution pattern of the plurality of repeating units is not particularly limited, but may be random. It is preferable to have a uniform distribution.
- the polyether polymer used in the present invention is a cationic group-containing polyether polymer containing an oxirane monomer unit having a cationic group as at least a part of the oxirane monomer unit.
- an oxirane monomer unit having a cationic group by containing an oxirane monomer unit having a cationic group, aggregation of fillers after a long period of time can be more appropriately suppressed, and therefore the polyether-based polymer of the present invention can be prevented.
- the combined composition can be made more excellent in long-term stability.
- the cationic group that can be contained in the polyether polymer is not particularly limited, but the effect of improving the dispersibility of the filler in the polyether polymer composition, and after a long period of time, From the viewpoint that the effect of suppressing the aggregation between the fillers can be more appropriately increased, the group 15 or group 16 atom of the periodic table is preferably a cationic group in which an onium cation structure is formed, and the nitrogen atom is More preferably a cationic group having an onium cation structure, more preferably a nitrogen atom in the nitrogen atom-containing aromatic heterocyclic ring is a cationic group having an onium cation structure, and a nitrogen atom in the imidazolium ring Is particularly preferably a cationic group having an onium cation structure.
- cationic group examples include ammonium group, methylammonium group, butylammonium group, cyclohexylammonium group, anilinium group, benzylammonium group, ethanolammonium group, dimethylammonium group, diethylammonium group, dibutylammonium group, and nonylphenylammonium.
- a group containing a heterocyclic ring containing a cationic nitrogen atom such as an imidazolium group, a 1-methylimidazolium group, a 1-ethylimidazolium group, or a benzimidazolium group is preferable.
- the cationic group usually has a counter anion, but the counter anion is not particularly limited.
- halide ions such as Cl ⁇ , Br ⁇ and I ⁇ and (FSO 2 ) 2 N ⁇ are used.
- (CF 3 SO 2 ) 2 N ⁇ , (CF 3 CF 2 SO 2 ) 2 N — and other sulfonylimide compounds, OH ⁇ , SCN ⁇ , BF 4 ⁇ , PF 6 ⁇ , ClO 4 ⁇ , CH 3 SO 3 ⁇ , CF 3 SO 3 ⁇ , CF 3 COO ⁇ , PhCOO ⁇ and the like can be mentioned.
- These counter anions may be appropriately selected according to the characteristics of the polyether polymer composition to be obtained.
- the polyether polymer used in the present invention is a cationic group-containing polyether polymer
- at least a part of the oxirane monomer units constituting the polyether polymer is a cationic group.
- all of the oxirane monomer units constituting the polyether polymer may have a cationic group, or an oxirane having a cationic group.
- a monomer unit and an oxirane monomer unit having no cationic group may be mixed.
- the ratio of the oxirane monomer unit having a cationic group is not particularly limited, and the polyether polymer 5 mol% or more is preferable with respect to the whole oxirane monomer unit, and 20 mol% or more is more preferable.
- the upper limit of the ratio for which the oxirane monomer unit which has a cationic group accounts is not specifically limited.
- the structure of the cationic group-containing polyether polymer in the case where the polyether polymer used in the present invention is a cationic group-containing polyether polymer is not particularly limited, but the following general formula (1) It is preferable that it consists of the monomer unit represented.
- a + represents a cationic group or a cationic group-containing group
- X ⁇ represents an arbitrary counter anion
- R represents a nonionic group
- n represents 1 or more. And is an integer greater than or equal to 0 and satisfies 10 ⁇ n + m ⁇ 200.
- a + represents a cationic group or a cationic group-containing group, and specific examples of the cationic group include those described above.
- the cationic group-containing group The group containing the cationic group mentioned above is mentioned.
- X ⁇ represents an arbitrary counter anion.
- specific examples of the counter anion include those described above.
- R is a nonionic group and is not particularly limited as long as it is a nonionic group.
- R is a nonionic group and is not particularly limited as long as it is a nonionic group.
- alkyl group having 1 to 10 carbon atoms such as methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, t-butyl group
- vinyl group, allyl group, propenyl group Alkenyl groups having 2 to 10 carbon atoms such as ethynyl groups, propynyl groups, etc .
- alkynyl groups having 2 to 10 carbon atoms cycloalkyl groups having 3 to 20 carbon atoms such as cyclopropyl groups, cyclobutyl groups, cyclopentyl groups, cyclohexyl groups, etc.
- An aryl group having 6 to 20 carbon atoms such as a phenyl group, a 1-naphthyl group and a 2-naphthyl group; Among these, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, and an aryl group having 6 to 20 carbon atoms May have a substituent at any position.
- substituents examples include an alkyl group having 1 to 6 carbon atoms such as a methyl group and an ethyl group; an alkoxy group having 1 to 6 carbon atoms such as a methoxy group, an ethoxy group and an isopropoxy group; and a carbon number such as a vinyloxy group and an allyloxy group 2-6 alkenyloxy groups; aryl groups optionally having substituents such as phenyl group, 4-methylphenyl group, 2-chlorophenyl group, 3-methoxyphenyl group; fluorine atom, chlorine atom, bromine atom, etc.
- a C 1-6 alkylcarbonyl group such as a methylcarbonyl group or an ethylcarbonyl group; a (meth) acryloyloxy group such as an acryloyloxy group or a methacryloyloxy group;
- n is an integer of 1 or more
- m is an integer of 0 or more
- 10 ⁇ n + m ⁇ 200 may be satisfied.
- Is preferably an integer of 20 to 190
- N + m is an integer of 10 to 200, preferably an integer of 15 to 195, and more preferably an integer of 20 to 190.
- the polymer chain end is not particularly limited, and any group It can be.
- the polymer chain end group include the above-described cationic group, hydroxyl group, or hydrogen atom.
- the polyether polymer used in the present invention is a cationic group-containing polyether polymer
- it may contain two or more oxirane monomer units.
- the distribution pattern of the plurality of repeating units is not particularly limited, but preferably has a random distribution.
- it may contain an oxirane monomer unit having two or more kinds of cationic groups, and further, an oxirane monomer unit having one kind or two or more kinds of cationic groups, and one or two kinds. It may contain an oxirane monomer unit having no cationic group.
- the polyether polymer used in the present invention is composed of 10 to 200 oxirane monomer units, and is preferably composed of 15 to 195 oxirane monomer units. More preferably, it consists of individual oxirane monomer units. If the number of oxirane monomer units constituting the polyether polymer is too large, the resulting composition will not have fluidity, and will not be in the form of a grease or paste. It becomes impossible to apply to the use used in the paste form. On the other hand, if the number of oxirane monomer units constituting the polyether polymer is too small, the dispersibility of the filler in the resulting composition is lowered. Aggregation occurs, resulting in poor long-term stability. In addition, the number of oxirane monomer units of the polyether polymer can be obtained by the method described in Examples described later.
- the polyether polymer used in the present invention may be any polymer comprising 10 to 200 oxirane monomer units, and the number average molecular weight (Mn) is not particularly limited, but is 300 to 150,000. It is preferably 400 to 100,000, more preferably 500 to 80,000.
- the molecular weight distribution (Mw / Mn) is preferably 1.0 to 2.0, more preferably 1.0 to 1.5.
- the number average molecular weight and molecular weight distribution of a polyether polymer can be calculated
- the chain structure of the polyether polymer used in the present invention is not particularly limited, and may be a linear chain structure or a chain structure having a branch structure such as a graft shape or a radial shape. .
- the method for synthesizing the polyether polymer used in the present invention is not particularly limited, and any synthesis method can be adopted as long as the desired polyether polymer can be obtained.
- a monomer containing an oxirane monomer is used as a catalyst, as disclosed in JP 2010-53217 A, and an onium salt of a compound containing a group 15 or group 16 atom in the periodic table.
- the polyether polymer used in the present invention is a cationic group-containing polyether polymer
- a monomer As a polyether polymer having no cationic group using at least an epihalohydrin such as epichlorohydrin, epibromohydrin, epiiodohydrin, etc., and having no cationic group obtained By reacting an amine compound such as an imidazole compound with a polyether polymer, the halogen group constituting the epihalohydrin monomer unit of the polyether polymer is converted to an onium halide group, and if necessary, By carrying out an anion exchange reaction, halide ions constituting the onium halide group And a method of obtaining a sexual group-containing polyether polymer.
- the polyether polymer composition of the present invention contains the above-described polyether polymer and a filler.
- the filler used in the present invention is not particularly limited in its chemical structure, composition, shape, and size, but in the chemical structure, either an organic filler or an inorganic filler may be used.
- An inorganic filler is preferred.
- the inorganic filler is not particularly limited, and examples thereof include metal-containing powders, carbon-based materials, and inorganic materials other than metal-containing powders and carbon-based materials.
- the polyether-based heavy metals of the present invention are also included. From the viewpoint that the combined composition can have a high thermal conductivity or a high electrical conductivity, a metal-containing powder is preferable.
- the metal-containing powder used in the present invention may be a single metal, an alloy, or a powder of a compound containing a metal atom, but a metal powder (single metal powder or alloy powder), metal oxide Powders and metal nitride powders are preferred.
- Examples of the metal powder include aluminum powder, gold powder, silver powder, copper powder, nickel powder, indium powder, gallium powder, metal silicon powder, and the like. Among these, silver powder and copper powder are preferable.
- Examples of the metal oxide powder include zinc oxide powder, silica powder, titanium oxide powder, alumina powder, silver oxide powder, zirconium oxide powder, and magnesium oxide powder. Among these, zinc oxide powder is preferable.
- Examples of the metal nitride powder include boron nitride powder and aluminum nitride powder. Among these, boron nitride powder is preferable.
- the metal-containing powder described above may be appropriately selected and used, and these may be used alone. Alternatively, two or more kinds may be mixed and used.
- metal oxide powder and metal-containing powder with respect to 100 parts by weight of the polyether-based polymer. It is preferable to use a metal nitride powder containing 10 to 2000 parts by weight in total, more preferably 100 to 1750 parts by weight, and more preferably 200 to 1500 parts by weight. It is more preferable to use a metal powder containing 0 to 1990 parts by weight, and it is preferable to use a metal powder containing 10 to 1500 parts by weight. It is more preferable to use one containing 50 to 1000 parts by weight.
- the polyether polymer composition of the present invention can be made particularly excellent in thermal conductivity.
- the metal powder is used as a metal-containing powder with respect to 100 parts by weight of the polyether polymer. It is preferable to use those contained at a ratio of parts by weight, more preferably those contained at a ratio of 100 to 1750 parts by weight, and still more preferably those contained at a ratio of 200 to 1500 parts by weight.
- the metal oxide powder and the metal nitride powder may be contained in the polyether polymer composition of the present invention, but it is preferable that they are not substantially contained. By making the ratio of metal powder into the said range, the polyether polymer composition of this invention can be made especially excellent in electrical conductivity.
- the carbon-based material is not particularly limited, and examples thereof include carbon black, acetylene black, carbon fiber, and graphite.
- examples of the inorganic material other than the metal-containing powder and the carbon-based material include glass fiber, glass powder, calcium carbonate, talc, and clay.
- inorganic materials other than a carbonaceous material and a metal containing powder and a carbonaceous material these may be used independently or used together with the metal containing powder mentioned above. Also good.
- the content ratio of the metal-containing powder in the filler in the case of using the carbon-based material and the metal-containing powder and the inorganic material other than the carbon-based material and the metal-containing powder is 100 parts by weight of the polyether polymer The amount is preferably 50 to 2000 parts by weight, more preferably 100 to 1750 parts by weight, and still more preferably 200 to 1500 parts by weight.
- the shape of the filler used in the present invention is not particularly limited, and may be in the form of scales, teardrops, spheres, needles, fibers, irregular shapes, or irregular shapes. Further, the filler may have been subjected to surface treatment in advance.
- the size is not particularly limited, and the average particle size is preferably 0.01 ⁇ m or more and less than 50 ⁇ m. It is preferably 0.02 ⁇ m or more and less than 40 ⁇ m. If the average particle size is too large, the smoothness of the polyether polymer composition of the present invention may be reduced, which may increase the contact resistance (thermal resistance, electrical resistance). On the other hand, if the average particle size is too small, the number of contact points between the fillers in the polyether polymer composition is reduced, and the characteristics of the filler such as thermal conductivity and electrical conductivity cannot be obtained sufficiently. There is a fear.
- the content of the filler in the polyether polymer composition of the present invention is 50 parts by weight or more, preferably 100 parts by weight or more, more preferably 200 parts by weight with respect to 100 parts by weight of the polyether polymer. Part or more, more preferably 400 parts by weight or more, particularly preferably 500 parts by weight or more. Moreover, although the upper limit is not specifically limited, Usually, it is 2000 weight part or less. According to the polyether polymer composition of the present invention, the filler can be favorably dispersed in the polyether polymer even when the filler is contained in a relatively large amount as described above. For this reason, since the contact point between the fillers can be ensured satisfactorily, various characteristics of the filler such as high thermal conductivity and high electrical conductivity can be appropriately exhibited.
- the polyether-based polymer composition of the present invention even when a relatively large amount of the filler is contained as described above, even after a long period of time, the aggregation between the fillers is effective. It can be suppressed and has excellent long-term stability.
- the polyether polymer composition of the present invention can be produced by mixing the polyether polymer described above and the filler described above.
- the method for mixing the polyether polymer and the filler is not particularly limited, but a known method such as a method of mixing by applying shearing force with a mill, an automatic mortar or a kneader, or a method of mixing by ultrasonic waves. A mixing method can be employed.
- the polyether polymer and the filler when they are mixed, they may be mixed in a solvent.
- the solvent to be used is not particularly limited, but a polar solvent is preferably used from the viewpoint that the filler can be more favorably dispersed in the polyether polymer.
- Polar solvents include ethers such as tetrahydrofuran and anisole; esters such as ethyl acetate and ethyl benzoate; ketones such as acetone, 2-butanone and acetophenone; acetonitrile, dimethylformamide, dimethylacetamide, dimethylsulfoxide, N-methylpyrrolidone and the like Aprotic polar solvent; protic polar solvent such as ethanol, methanol, water; and the like. These solvents may be used alone or as a mixed solvent of two or more. The amount of the solvent to be used is not particularly limited, but may be in a range where the total content of the polyether polymer and the filler in the solvent is 0.1 to 80% by weight.
- the method for mixing the polyether polymer and the filler in the solvent is not particularly limited, and the polyether polymer is added to the suspension obtained by suspending the filler in the solvent and mixed.
- a method of adding a filler to a solution obtained by dissolving a polyether polymer in a solvent may be used. Mixing may be performed by stirring using a commonly used stirrer, or may be performed using an ultrasonic disperser.
- the solution obtained by mixing can be used as it is as the polyether polymer composition of the present invention, but is preferably used after removing the solvent.
- the method for removing the solvent is not particularly limited. For example, the solvent may be removed by evaporation or may be coagulated and dried.
- the polyether polymer and the filler are mixed without using a solvent
- a method in which the polyether polymer is added to the filler and mixed may be employed.
- a method of adding a filler to the polyether polymer and mixing it may be employed. In this case, the mixing may be performed using a generally used kneader or stirrer, or may be performed using a mill or an automatic mortar.
- the polyether polymer composition of the present invention may contain other components in addition to the polyether polymer and the filler.
- other components include, but are not limited to, polymer materials other than the specific polyether polymers described above; organic solvents; ionic liquids, and the like.
- the polyether polymer when it has a crosslinkable monomer unit, it may be a crosslinkable composition by containing a crosslinker. Or a cross-linking accelerator.
- the polyether polymer composition of the present invention is a crosslinkable composition, applied to a substrate or the like in the state of grease or paste, coated, printed, etc., and then crosslinked to form a crosslinked product.
- the cross-linking agent may be selected according to the structure of the cross-linkable monomer unit to be used, and is not particularly limited.
- the polymer material other than the specific polyether polymer described above is not particularly limited.
- Thermoplastic elastomer materials such as styrene isoprene styrene, styrene butadiene styrene, styrene ethylene butadiene styrene
- Resin materials such as PMMA, polyethylene, polypropylene, polystyrene, polycarbonate, ABS, vinyl chloride, PET; Epoxy Examples thereof include light or thermosetting resins such as resins, urethane resins, and thermo- and photo-curable bright acrylate resins.
- the filler is contained in an amount of 50 parts by weight or more with respect to 100 parts by weight of the specific polyether polymer described above.
- the filler since the filler can be favorably dispersed in the polyether polymer, the filler is provided with a filler such as high thermal conductivity and high electrical conductivity.
- a filler such as high thermal conductivity and high electrical conductivity.
- the polyether polymer composition of the present invention can be in the form of a grease or a paste, so that it has a high thermal conductivity, excellent long-term stability, and a high heat conductivity. And can be suitably used as various greases and pastes such as conductive pastes having excellent long-term stability.
- the number average molecular weight (Mn) and molecular weight distribution (Mw / Mn) of the polyether-based polymer not containing a cationic group are determined as a polystyrene-based value by gel permeation chromatography (GPC) using tetrahydrofuran as a solvent.
- the number average molecular weight (Mn) and molecular weight distribution (Mw / Mn) of the polymer were measured.
- the measuring instrument used was HLC-8320 (manufactured by Tosoh Corporation), the column was used by connecting two TSKgel ⁇ -M (manufactured by Tosoh Corporation) in series, and the detector was a differential refractometer RI-8320 (manufactured by Tosoh Corporation). ) was used.
- the number of repeating units was calculated by dividing the obtained number average molecular weight by the molecular weight of the repeating units constituting the polyether polymer.
- the number average molecular weight of the cationic group-containing polyether polymer was determined as follows.
- the average molecular weight of the repeating unit of the polyether polymer not containing the cationic group before introducing the cationic group the average molecular weight of the oxirane monomer unit having the cationic group, and the following (2)
- the average molecular weight of all repeating units constituting the cationic group-containing polyether polymer was determined from the content of the oxirane monomer unit having a cationic group determined by the above.
- the number of repeating units of the polyether polymer that does not contain a cationic group before introducing the cationic group is multiplied by the average molecular weight of all the repeating units constituting the cationic group-containing polyether polymer.
- the value obtained by this was taken as the number average molecular weight of the cationic group-containing polyether polymer. Further, the molecular weight distribution of the cationic group-containing polyether polymer was used as it was, as it was not changed from the molecular weight distribution of the polyether polymer not containing the cationic group before introducing the cationic group.
- the content rate of the oxirane monomer unit which has a cationic group in a cationic group containing polyether polymer was computed with the following method. That is, first, the number of moles B1 of all oxirane monomer units was calculated from the integral value of protons derived from the main chain oxirane monomer units. Next, the number of moles B2 of the oxirane monomer unit having a cationic group was calculated from the integral value of protons derived from the cationic group. And the ratio (percentage) of B2 with respect to B1 was calculated
- each polymer composition to be a sample is made into a disk-shaped test piece having a size of ⁇ 12.8 mm, and is thickened by a hand press so that the sample thickness is in a range of 0.1 mm to 1.0 mm. By adjusting the thickness, a plurality of measurement samples having different thicknesses were obtained.
- the obtained measurement sample is inserted
- each polymer composition was measured using a low resistivity meter ("Loresta-GP", Mitsubishi Electric) after 5 days from the production of each polymer composition. Measured by the following method according to JIS K 7194 using a chemical analyzer (PSP probe as a four-probe probe). First, 1.0 g of each polymer composition serving as a sample was press-molded at a temperature of 100 ° C. to 150 ° C. and a pressure of 0.1 to 1.0 MPa to form a thin film having a thickness of 100 to 500 ⁇ m. A 10 mm square was cut out and used as a measurement sample.
- the obtained measurement sample is fixed on the insulating board of the low resistivity meter, the probe is pressed against the center of one surface (A surface) of the measurement sample, and then a voltage of 10 V is applied to the measurement sample.
- the resistance value was measured.
- the surface resistance (unit: ⁇ / ⁇ ) was obtained using an arithmetic expression built in the low resistivity meter. In this measurement, this measurement is similarly performed on the other surface (B surface) of the measurement sample, the average value of the surface resistance measured for the A surface and the B surface is calculated, and the obtained average value is calculated.
- the surface resistance of the measurement sample was used. Further, the measurement of the surface resistance was carried out after 5 days had passed after each polymer composition was prepared, and was also conducted after 2 months. By comparing these, the long-term stability was also confirmed.
- Dispersibility after long-term storage For each polymer composition, the long-term stability was evaluated by observing the maintainability of the dispersed state with a scanning electron microscope (SEM). . Specifically, the dispersibility after long-term storage was evaluated based on the following criteria by the above-described morphology observation. It can be judged that the better the dispersibility after long-term storage, the better the long-term stability. A: The matrix polymer and the metal-containing powder as the filler maintained a good dispersion state even after two months had passed since the preparation of the polymer composition.
- SEM scanning electron microscope
- ⁇ Although a good dispersion state was exhibited for one week after the preparation of the polymer composition, the dispersion state of the matrix polymer and the metal-containing powder as the filler was slight after two months. Had fallen.
- X When the polymer composition was prepared, it could not be in the form of a grease or a paste, and became a powder form. Alternatively, when the polymer composition was produced, it could be obtained in the form of a grease or a paste, but after 5 days from the production, aggregation of the metal-containing powder as a filler was observed.
- the number average molecular weight (Mn) by GPC of the obtained oily substance is 3,500
- the molecular weight distribution (Mw / Mn) is 1.4
- the number of repeating units (the number of oxirane monomer units) is 37. there were.
- the obtained oily substance was identified as a polyether polymer A composed of epichlorohydrin units having a bromomethyl group at the polymerization initiation terminal and a hydroxyl group at the polymerization termination terminal.
- the number average molecular weight (Mn) of the imidazolium structure-containing polyether polymer B was 4,300, the molecular weight distribution (Mw / Mn) was 1.4, and the number of repeating units (the number of oxirane monomer units) was 37. . Further, according to the above method, the content of the oxirane monomer unit having a 1-methylimidazolium group as a cationic group was measured and found to be 30 mol%.
- the number average molecular weight (Mn) of the imidazolium structure-containing polyether polymer C was 6,500, the molecular weight distribution (Mw / Mn) was 1.4, and the number of repeating units (the number of oxirane monomer units) was 37. . Further, according to the above method, the content of the oxirane monomer unit having a 1-methylimidazolium group as a cationic group was measured and found to be 100 mol%.
- the number average molecular weight (Mn) of the imidazolium structure-containing polyether polymer D was 15,500, the molecular weight distribution (Mw / Mn) was 1.4, and the number of repeating units (the number of oxirane monomer units) was 37. . Further, according to the above method, the content of the oxirane monomer unit having a 1-methylimidazolium group as a cationic group was measured and found to be 100 mol%.
- the number average molecular weight (Mn) by GPC of the obtained oily substance was 17100
- molecular weight distribution (Mw / Mn) was 1.2
- the number of repeating units (the number of oxirane monomer units) was 185.
- the obtained oily substance was identified as a polyether polymer E ′′ composed of epichlorohydrin units having a bromomethyl group at the polymerization initiation terminal and a hydroxyl group at the polymerization termination terminal. It was done.
- the obtained viscous liquid substance was subjected to 1 H-NMR spectrum measurement and elemental analysis.
- the imidazolium structure-containing polyether polymer E ′ having a halide ion as a counter anion as a starting material All of the bromide ions were identified as the imidazolium structure-containing polyether polymer E having the bis (trifluoromethanesulfonyl) imide anion as the counter anion exchanged for the bis (trifluoromethanesulfonyl) imide anion.
- the number average molecular weight (Mn) of the imidazolium structure-containing polyether polymer E was 78,000, the molecular weight distribution (Mw / Mn) was 1.2, and the number of repeating units (the number of oxirane monomer units) was 185. . Further, according to the above method, the content of the oxirane monomer unit having a 1-methylimidazolium group as a cationic group was measured and found to be 100 mol%.
- the number average molecular weight (Mn) by GPC of the obtained oily substance was 2030
- the molecular weight distribution (Mw / Mn) was 1.3
- the number of repeating units (the number of oxirane monomer units) was 27.
- the obtained oily substance is a polyether polymer F ′ composed of epichlorohydrin units and propylene oxide units having a bromomethyl group at the polymerization initiation terminal and a hydroxyl group at the polymerization termination terminal.
- the monomer composition ratio of the polyether polymer F ′ was 50 mol% of epichlorohydrin monomer units and 50 mol% of propylene oxide monomer units.
- the number average molecular weight (Mn) of the imidazolium structure-containing polyether polymer F was 6,500, the molecular weight distribution (Mw / Mn) was 1.3, and the number of repeating units (the number of oxirane monomer units) was 27. . Further, according to the above method, the content of the oxirane monomer unit having a 1-methylimidazolium group as a cationic group was measured and found to be 50 mol%.
- the number average molecular weight (Mn) by GPC of the obtained oily substance was 14000
- molecular weight distribution (Mw / Mn) was 1.2
- the number of repeating units (the number of oxirane monomer units) was 152.
- the obtained oily substance was identified as a polyether polymer G ′ composed of epichlorohydrin units having a bromomethyl group at the polymerization initiation terminal and a hydroxyl group at the polymerization termination terminal. It was.
- the number average molecular weight (Mn) of the imidazolium structure-containing polyether polymer G was 26,700, the molecular weight distribution (Mw / Mn) was 1.2, and the number of repeating units (the number of oxirane monomer units) was 152. . Further, according to the above method, the content of the oxirane monomer unit having a 1-methylimidazolium group as a cationic group was measured and found to be 100 mol%.
- Example 1 100 parts of the polyether polymer A obtained in Production Example 1, 407 parts of zinc oxide powder (manufactured by Kanto Chemical Co., Ltd., average particle size of 5 to 10 ⁇ m) as an inorganic filler, silver powder (manufactured by Aldrich Co., average particle) 207 parts (diameter 5 to 8 ⁇ m) and 714 parts of N, N′-dimethylacetamide (DMAc) as a solvent were placed in an automatic mortar and mixed at room temperature for 30 minutes. Then, after further mixing while heating the obtained composition, it was put in a vacuum dryer and further dried under the conditions of 0.01 MPa or less, 60 ° C., 12 hours or more, so that A coalescence composition was obtained. And using the obtained grease-like polymer composition for heat dissipation, according to the said method, each measurement and evaluation of thermal conductivity and the dispersibility after a long-term storage were performed. The results are shown in Table 1.
- Example 2 Instead of the polyether polymer A obtained in Production Example 1, 100 parts of the imidazolium structure-containing polyether polymer B obtained in Production Example 2 was used, and instead of silver powder, copper powder was used. Except for using 207 parts (manufactured by Aldrich, average particle diameter: 14 to 25 ⁇ m), a grease-like heat-dissipating polymer composition was obtained in the same manner as in Example 1, and each measurement and evaluation was performed in the same manner. . The results are shown in Table 1.
- Example 3 In the same manner as in Example 1, except that 100 parts of the imidazolium structure-containing polyether polymer C obtained in Production Example 3 was used instead of the polyether polymer A obtained in Production Example 1. A grease-like polymer composition for heat dissipation was obtained, and each measurement / evaluation was performed in the same manner. The results are shown in Table 1.
- Example 4 In the same manner as in Example 1, except that 100 parts of the imidazolium structure-containing polyether polymer D obtained in Production Example 4 was used instead of the polyether polymer A obtained in Production Example 1. A grease-like polymer composition for heat dissipation was obtained, and each measurement / evaluation was performed in the same manner. The results are shown in Table 1.
- Example 5 In place of the polyether polymer A obtained in Production Example 1, 100 parts of the imidazolium structure-containing polyether polymer E obtained in Production Example 5 was used, and instead of silver powder, copper powder was used. Except for using 207 parts (manufactured by Aldrich, average particle diameter: 14 to 25 ⁇ m), a grease-like heat-dissipating polymer composition was obtained in the same manner as in Example 1, and each measurement and evaluation was performed in the same manner. . The results are shown in Table 1.
- Example 6 In place of the polyether polymer A obtained in Production Example 1, 100 parts of the imidazolium structure-containing polyether polymer F obtained in Production Example 6 was used, and instead of silver powder, copper powder was used. Except for using 207 parts (manufactured by Aldrich, average particle diameter: 14 to 25 ⁇ m), a grease-like heat-dissipating polymer composition was obtained in the same manner as in Example 1, and each measurement and evaluation was performed in the same manner. . The results are shown in Table 1.
- Example 7 In place of the polyether polymer A obtained in Production Example 1, 100 parts of the imidazolium structure-containing polyether polymer D obtained in Production Example 4 was used, and instead of zinc oxide powder and silver powder. In addition, a grease-like heat-dissipating polymer composition was obtained in the same manner as in Example 1 except that 210 parts of boron nitride powder (Denka Co., average particle size: 10 to 18 ⁇ m) was used. ⁇ Evaluated. The results are shown in Table 1.
- Example 8 In place of the polyether polymer A obtained in Production Example 1, 100 parts of the imidazolium structure-containing polyether polymer E obtained in Production Example 5 was used, and instead of zinc oxide powder and silver powder. In addition, a grease-like heat-dissipating polymer composition was obtained in the same manner as in Example 1 except that 300 parts of boron nitride powder (Denka Co., average particle size 10 to 18 ⁇ m) was used. ⁇ Evaluated. The results are shown in Table 1.
- Comparative Example 2 In the same manner as in Comparative Example 1 except that 100 parts of liquid silicone rubber (manufactured by Gelest, number average molecular weight: 6,000, molecular weight distribution: 2.1) was used instead of liquid butadiene rubber, a heat dissipation polymer. A composition was obtained. The heat-dissipating polymer composition obtained in Comparative Example 2 aggregated into a powder form, and therefore could not be obtained as a grease-like composition. And about the obtained powdery polymer composition for thermal radiation, according to the said method, each measurement and evaluation were performed. In Comparative Example 2, an attempt was made to measure the thermal conductivity using a disk-shaped test piece after two months, but it was difficult to maintain the shape and could not be measured. The results are shown in Table 2.
- Example 9 100 parts of the polyether-based polymer A obtained in Production Example 1, 233 parts of silver powder (manufactured by Aldrich, average particle diameter of 5 to 8 ⁇ m) as an inorganic filler, and N, N′-dimethylacetamide (as the solvent) DMAc) 333 parts were put into an automatic mortar and mixed at room temperature for 30 minutes. Then, after further mixing while heating the obtained composition, it was put in a vacuum dryer and further dried under conditions of 0.01 MPa or less, 60 ° C., 12 hours or more, so that a paste-like heavy weight was obtained. A coalescence composition was obtained. Then, each measurement and evaluation of surface resistance (electrical conductivity) and dispersibility after long-term storage were performed using the obtained paste-like conductive polymer composition according to the above-described method. The results are shown in Table 3.
- Example 10 In the same manner as in Example 9, except that 100 parts of the imidazolium structure-containing polyether polymer B obtained in Production Example 2 was used instead of the polyether polymer A obtained in Production Example 1. A paste-like conductive polymer composition was obtained, and each measurement / evaluation was performed in the same manner. The results are shown in Table 3.
- Example 11 A paste-like conductive polymer composition was obtained in the same manner as in Example 10 except that the amount of silver powder used was changed from 233 parts to 400 parts, and each measurement / evaluation was performed in the same manner. The results are shown in Table 3.
- Example 12 Instead of the polyether polymer A obtained in Production Example 1, 100 parts of the imidazolium structure-containing polyether polymer G obtained in Production Example 7 was used, and the amount of silver powder used was 233 parts. Except for changing to 900 parts, a paste-like conductive polymer composition was obtained in the same manner as in Example 9, and each measurement / evaluation was performed in the same manner. The results are shown in Table 3.
- Example 13 In the same manner as in Example 9, except that 100 parts of the imidazolium structure-containing polyether polymer D obtained in Production Example 4 was used instead of the polyether polymer A obtained in Production Example 1. A paste-like conductive polymer composition was obtained, and each measurement / evaluation was performed in the same manner. The results are shown in Table 3.
- Comparative Example 6 A conductive polymer in the same manner as in Comparative Example 5, except that 100 parts of liquid silicone rubber (manufactured by Gelest, number average molecular weight: 6,000, molecular weight distribution: 2.1) was used instead of liquid butadiene rubber. A composition was obtained. In addition, the conductive polymer composition obtained in Comparative Example 6 aggregated in a powder form, and thus could not be obtained as a paste-like composition. And about the obtained powdery conductive polymer composition, each measurement and evaluation were performed according to the said method. In Comparative Example 6, measurement of surface resistance (electrical conductivity) was attempted using a test piece both 5 days after production and after 2 months, but it was difficult to maintain the shape and measurement was possible. could not. The results are shown in Table 4.
- Comparative Example 7 A conductive polymer composition was prepared in the same manner as in Comparative Example 5 except that 100 parts of high molecular weight styrene butadiene rubber (number average molecular weight 250,000, molecular weight distribution: 2.6) was used instead of liquid butadiene rubber. Obtained. In addition, the conductive polymer composition obtained in Comparative Example 7 aggregated into a powder form, and thus could not be obtained as a paste-like composition. And about the obtained powdery conductive polymer composition, each measurement and evaluation were performed according to the said method. In Comparative Example 7, measurement of surface resistance (electrical conductivity) was attempted using the test piece both after 5 days and after 2 months, but it was difficult to maintain the shape and measurement was possible. could not. The results are shown in Table 4.
- Comparative Example 8 A conductive polymer composition was prepared in the same manner as in Comparative Example 5, except that 100 parts of high molecular weight silicone rubber (number average molecular weight: 63,000, molecular weight distribution: 2.3) was used instead of liquid butadiene rubber. Obtained. In addition, the conductive polymer composition obtained in Comparative Example 8 aggregated into a powder form, and thus could not be obtained as a paste-like composition. And about the obtained powdery conductive polymer composition, each measurement and evaluation were performed according to the said method. In Comparative Example 8, measurement of surface resistance (electrical conductivity) was attempted using a test piece both 5 days after production and after 2 months, but it was difficult to maintain the shape and measurement was possible. could not. The results are shown in Table 4.
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Abstract
Description
本発明のポリエーテル系重合体組成物において、前記ポリエーテル系重合体に含まれる前記オキシラン単量体単位の少なくとも一部が、カチオン性基を有するオキシラン単量体単位であることが好ましく、前記ポリエーテル系重合体が、下記一般式(1)で表される単量体単位からなることがより好ましい。
本発明のポリエーテル系重合体組成物において、前記カチオン性基が、カチオン性の窒素原子を含有する複素環を含んでなる基であることが好ましい。
本発明のポリエーテル系重合体組成物において、前記充填剤の平均粒径が、0.01μm以上、50μm未満であることが好ましい。
あるいは、本発明のポリエーテル系重合体組成物は、導電用の重合体組成物であることが好ましい。
また、本発明のポリエーテル系重合体組成物は、グリース状またはペースト状であることが好ましい。
本発明のポリエーテル系重合体組成物を構成するポリエーテル系重合体は、オキシラン構造を含有する化合物のオキシラン構造部分が開環重合することにより得られる単位である、オキシラン単量体単位からなり、オキシラン単量体単位数が10~200個である重合体である。
これらのうち、炭素数1~10のアルキル基、炭素数2~10のアルケニル基、炭素数2~10のアルキニル基、炭素数3~20のシクロアルキル基、および炭素数6~20のアリール基は、任意の位置に置換基を有していてもよい。
置換基としては、メチル基、エチル基等の炭素数1~6のアルキル基;メトキシ基、エトキシ基、イソプロポキシ基等の炭素数1~6のアルコキシ基;ビニルオキシ基、アリルオキシ基等の炭素数2~6のアルケニルオキシ基;フェニル基、4-メチルフェニル基、2-クロロフェニル基、3-メトキシフェニル基等の置換基を有していてもよいアリール基;フッ素原子、塩素原子、臭素原子等のハロゲン原子;メチルカルボニル基、エチルカルボニル基等の炭素数1~6のアルキルカルボニル基;アクリロイルオキシ基、メタクリロイルオキシ基等の(メタ)アクリロイルオキシ基;等が挙げられる。
本発明のポリエーテル系重合体組成物は、上述したポリエーテル系重合体と、充填剤とを含有するものである。
金属酸化物粉末としては、酸化亜鉛粉末、シリカ粉末、酸化チタン粉末、アルミナ粉末、酸化銀粉末、酸化ジルコニウム粉末、酸化マグネシウム粉末などが挙げられ、これらのなかでも、酸化亜鉛粉末が好ましい。
また、金属窒化物粉末としては、窒化ホウ素粉末、窒化アルミニウム粉末などが挙げられ、これらのなかでも、窒化ホウ素粉末が好ましい。
また、金属含有粉末および炭素系材料以外の無機材料としては、ガラス繊維、ガラス粉末、炭酸カルシウム、タルク、クレイなどが挙げられる。
本発明のポリエーテル系重合体組成物は、上述したポリエーテル系重合体と、上述した充填剤とを混合することにより製造することができる。ポリエーテル系重合体と、充填剤とを混合する方法としては、特に限定されないが、ミルや自動乳鉢、混練機によりせん断力を加えて混合する方法や、超音波により混合する方法などの公知の混合方法を採用することができる。
また、本発明のポリエーテル系重合体組成物には、ポリエーテル系重合体、および充填剤に加えて、その他の成分を含有するものであってもよい。その他の成分としては、特に限定されないが、上述した特定のポリエーテル系重合体以外のポリマー材料;有機溶媒;イオン液体;などを挙げることができる。また、ポリエーテル系重合体が架橋性の単量体単位を有する場合には、架橋剤を含有させることで、架橋可能な組成物としてもよく、この場合には、必要に応じて架橋助剤や架橋促進剤を含有させてもよい。特に、本発明のポリエーテル系重合体組成物を架橋可能な組成物とし、グリース状またはペースト状の状態で基材等に塗布、塗工、印刷等した後に、これを架橋して架橋物とすることにより、本発明の作用効果、具体的には、高い熱伝導率や高い電気伝導性など充填剤の備える各種特性を適切に発揮させることができ、しかも、長期安定性に優れたものとすることができるという効果を適切に維持しながら、構造材料としての機械強度を向上させることができる。架橋剤としては、用いる架橋性の単量体単位の構造などに応じて選択すればよく、特に限定されるものではない。
カチオン性基を含有しないポリエーテル系重合体の数平均分子量(Mn)および分子量分布(Mw/Mn)は、テトラヒドロフランを溶媒とするゲルパーミエーションクロマトグラフィ(GPC)により、ポリスチレン換算値として、ポリエーテル系重合体の数平均分子量(Mn)および分子量分布(Mw/Mn)を測定した。なお、測定器としてはHLC-8320(東ソー社製)を用い、カラムはTSKgelα-M(東ソー社製)二本を直列に連結して用い、検出器は示差屈折計RI-8320(東ソー社製)を用いた。また、得られた数平均分子量を、ポリエーテル系重合体を構成する繰り返し単位の分子量で除すことにより、繰り返し単位数を算出した。
なお、カチオン性基含有ポリエーテル系重合体の数平均分子量は、次のように求めた。すなわち、まず、カチオン性基を導入する前のカチオン性基を含有しないポリエーテル系重合体の繰り返し単位の平均分子量と、カチオン性基を有するオキシラン単量体単位の平均分子量、および下記(2)により求めたカチオン性基を有するオキシラン単量体単位の含有率とから、カチオン性基含有ポリエーテル系重合体を構成する、全ての繰り返し単位の平均分子量を求めた。そして、カチオン性基を導入する前のカチオン性基を含有しないポリエーテル系重合体の繰り返し単位数と、カチオン性基含有ポリエーテル系重合体を構成する、全ての繰り返し単位の平均分子量とを乗じることにより得られた値を、カチオン性基含有ポリエーテル系重合体の数平均分子量とした。
また、カチオン性基含有ポリエーテル系重合体の分子量分布は、カチオン性基を導入する前のカチオン性基を含有しないポリエーテル系重合体の分子量分布から変化していないものとして、そのまま用いた。
ポリエーテル系重合体の構造、およびカチオン性基含有ポリエーテル系重合体中の、カチオン性基を有するオキシラン単量体単位の含有率は、核磁気共鳴装置(NMR)を用いて、以下のように測定した。すなわち、まず、試料となるポリエーテル系重合体30mgを、1.0mLの重クロロホルムまたは重ジメチルスルホキシドに加え、1時間振蕩することにより均一に溶解させた。そして、得られた溶液についてNMR測定を行って、1H-NMRスペクトルを得て、定法に従いポリエーテル系重合体の構造を帰属した。
また、カチオン性基含有ポリエーテル系重合体中の、カチオン性基を有するオキシラン単量体単位の含有率は、次の方法により算出した。すなわち、まず、主鎖のオキシラン単量体単位に由来するプロトンの積分値から全オキシラン単量体単位のモル数B1を算出した。次に、カチオン性基に由来するプロトンの積分値から、カチオン性基を有するオキシラン単量体単位のモル数B2を算出した。そして、B1に対するB2の割合(百分率)を、カチオン性基含有ポリエーテル系重合体中の、カチオン性基を有するオキシラン単量体単位の含有率として求めた。
各重合体組成物の熱伝導率を、各重合体組成物を製造してから5日経過した後のものを用いて、熱伝導率測定装置(「MentorGraphics DynTIM Tester」、メンター・グラフィックス・ジャパン社製)により、次の方法により測定した。すなわち、まず、試料となる各重合体組成物を、φ12.8mmのサイズの円板状試験片として、サンプル厚さが0.1mm~1.0mmの範囲となるように、ハンドプレスにて厚さを調整することで、厚みの異なる複数の測定サンプルを得た。そして、得られた測定サンプルを、熱伝導率測定装置の加熱部と測定部との間に挟み込み、加熱部と測定部の間の測定温度差を10℃とし、大気下25℃の測定環境にて、厚み方向について熱抵抗を測定し。そして、この熱抵抗測定を、厚みの異なる複数の測定サンプルに対して行い、得られた測定結果を一次の近似式にてプロットすることにより、熱伝導率を算出した。
また、上記熱伝導率の測定を、各重合体組成物を作製して5日経過した後に加え、2か月間経過後においても行い、これらを比較することで、長期安定性についても確認した。
各重合体組成物の電気伝導性は、各重合体組成物を製造してから5日経過した後のものを用いて、低抵抗率計(「ロレスタ-GP」、三菱化学アナリテック社製、四探針プローブとしてPSPプローブを使用)により、JIS K 7194に準拠して、次の方法により測定した。まず、試料となる各重合体組成物1.0gを、温度100℃~150℃、圧力0.1~1.0MPaの範囲でプレス成形し、厚さ100~500μmの薄膜状にした後、10×10mmの正方形状に切り出し、これを測定サンプルとした。そして、得られた測定サンプルを、低抵抗率計の絶縁ボード上に固定し、測定サンプルの一方の面(A面)の中心にプローブを押し当てた後、10Vの電圧をかけて測定サンプルの抵抗値を測定した。そして、測定により得られた抵抗値、測定サンプル寸法、および測定位置に基づき、低抵抗率計に内蔵されている演算式を利用して、表面抵抗(単位:Ω/□)を求めた。本測定においては、この測定を、測定サンプルのもう一方の面(B面)についても同様に行い、A面およびB面について測定された表面抵抗の平均値を算出し、得られた平均値を、測定サンプルの表面抵抗とした。
また、上記表面抵抗の測定を、各重合体組成物を作製して5日経過した後に加え、2か月間経過後においても行い、これらを比較することで、長期安定性についても確認した。
各重合体組成物について、分散状態の維持性を、走査型電子顕微鏡(Scanning Electron Microscope;SEM)による形態観察を行うことで、長期安定性の評価を行った。具体的には、上記形態観察により、以下の基準で、長期保存後の分散性を評価した。長期保存後の分散性に優れるほど、長期安定性に優れるものと判断できる。
◎:重合体組成物を作製してから、2か月間経過しても、マトリックスポリマーと充填剤としての金属含有粉末とが良好な分散状態を保持していた。
○:重合体組成物を作製してから、1週間は良好な分散状態を示したものの、2か月間経過後には、わずかではあるが、マトリックスポリマーと充填剤としての金属含有粉末との分散状態が低下していた。
×:重合体組成物を作製した際に、グリース状あるいはペースト状とすることができず、粉末状の形態となった。あるいは、重合体組成物を作製した際に、グリース状あるいはペースト状で得ることは可能であったが、作製してから5日後には、充填剤としての金属含有粉末の凝集が認められた。
(ポリエーテル系重合体Aの合成)
アルゴンで置換した攪拌機付きガラス反応器に、テトラノルマルブチルアンモニウムブロミド3.22gとトルエン100mlを添加し、これを0℃に冷却した。次いで、トリエチルアルミニウム1.370g(テトラノルマルブチルアンモニウムブロミドに対して1.2当量)をノルマルヘキサン10mlに溶解したものを添加して、15分間反応させて、触媒組成物を得た。得られた触媒組成物に、エピクロロヒドリン35.0gを添加し、0℃において重合反応を行った。重合反応開始後、徐々に溶液の粘度が上昇した。12時間反応後、重合反応液に少量の水を注いで反応を停止した。得られた重合反応液を0.1Nの塩酸水溶液で洗浄することにより触媒残渣の脱灰処理を行い、さらにイオン交換水で洗浄した後に、有機相を50℃で12時間減圧乾燥した。これにより得られたオイル状物質の収量は34.6gであった。また、得られたオイル状物質のGPCによる数平均分子量(Mn)は3,500、分子量分布(Mw/Mn)は1.4であり、繰り返し単位数(オキシラン単量体単位数)は37であった。以上より、得られたオイル状物質は、重合開始末端にブロモメチル基を持ち、重合停止末端に水酸基を持つ、エピクロロヒドリン単位により構成されたポリエーテル系重合体Aであると同定された。
(イミダゾリウム構造含有ポリエーテル系重合体Bの合成)
製造例1で得られたポリエーテル系重合体A 5.0gと、1-メチルイミダゾール6.1gと、アセトニトリル10.0gとを、アルゴンで置換した攪拌機付きガラス反応器に添加し、80℃に加熱した。80℃で48時間反応させた後、室温に冷却し反応を停止した。得られた反応物をトルエン/メタノール/水の等重量混合溶液にて洗浄した後、1-メチルイミダゾールおよびトルエンを含む有機相を除去して、水相を50℃で12時間減圧乾燥したところ、薄赤色の固体6.35gが得られた。この固体について、1H-NMR測定および元素分析を行ったところ、出発原料のポリエーテル系重合体A(ポリエピクロロヒドリン)の、繰り返し単位におけるクロロ基のうち一部が対アニオンとして塩化物イオンを有する1-メチルイミダゾリウム基に、重合開始末端のブロモメチル基のブロモ基が対アニオンとして臭化物イオンを有する1-メチルイミダゾリウム基に、それぞれ置換された、対アニオンとしてハロゲン化物イオンを有するイミダゾリウム構造含有ポリエーテル系重合体Bであると同定された。イミダゾリウム構造含有ポリエーテル系重合体Bの数平均分子量(Mn)は4,300、分子量分布(Mw/Mn)は1.4、繰り返し単位数(オキシラン単量体単位数)は37であった。また、上記方法にしたがって、カチオン性基としての1-メチルイミダゾリウム基を有するオキシラン単量体単位の含有率を測定したところ、30モル%であった。
(イミダゾリウム構造含有ポリエーテル系重合体Cの合成)
製造例1で得られたポリエーテル系重合体A 5.0gと、1-メチルイミダゾール12.1gと、アセトニトリル10.0gとを、アルゴンで置換した攪拌機付きガラス反応器に添加し、80℃に加熱した。80℃で48時間反応させた後、室温に冷却し反応を停止した。得られた反応物をトルエン/メタノール/水の等重量混合溶液にて洗浄した後、1-メチルイミダゾールおよびトルエンを含む有機相を除去して、水相を50℃で12時間減圧乾燥したところ、薄赤色の固体9.4gが得られた。この固体について、1H-NMR測定および元素分析を行ったところ、出発原料のポリエーテル系重合体A(ポリエピクロロヒドリン)の、繰り返し単位におけるクロロ基全てが対アニオンとして塩化物イオンを有する1-メチルイミダゾリウム基に、重合開始末端のブロモメチル基のブロモ基が対アニオンとして臭化物イオンを有する1-メチルイミダゾリウム基に、それぞれ置換された、対アニオンとしてハロゲン化物イオンを有するイミダゾリウム構造含有ポリエーテル系重合体Cであると同定された。イミダゾリウム構造含有ポリエーテル系重合体Cの数平均分子量(Mn)は6,500、分子量分布(Mw/Mn)は1.4、繰り返し単位数(オキシラン単量体単位数)は37であった。また、上記方法にしたがって、カチオン性基としての1-メチルイミダゾリウム基を有するオキシラン単量体単位の含有率を測定したところ、100モル%であった。
(イミダゾリウム構造含有ポリエーテル系重合体Dの合成)
製造例3にて得られた対アニオンとしてハロゲン化物イオンを有するイミダゾリウム構造含有ポリエーテル化合物C 2.5gと、リチウムビス(トリフルオロメタンスルホニル)イミド4.1gと、イオン交換水20mLとを攪拌機付きガラス反応器に添加した。室温で30分間反応させた後、50℃で12時間減圧乾燥し、得られた固液混合物を水で洗浄して無機塩を除去した後、トルエンで液相を抽出した。得られたトルエン溶液を50℃で12時間減圧乾燥したところ、粘性液状物質5.7gが得られた。得られた粘性液状物質について1H-NMRスペクトル測定と元素分析を行ったところ、出発原料である対アニオンとしてハロゲン化物イオンを有するイミダゾリウム構造含有ポリエーテル化合物の、塩化物イオンおよび臭化物イオンの全てが、ビス(トリフルオロメタンスルホニル)イミドアニオンに交換された、対アニオンとしてビス(トリフルオロメタンスルホニル)イミドアニオンを有するイミダゾリウム構造含有ポリエーテル系重合体Dであると同定された。イミダゾリウム構造含有ポリエーテル系重合体Dの数平均分子量(Mn)は15,500、分子量分布(Mw/Mn)は1.4、繰り返し単位数(オキシラン単量体単位数)は37であった。また、上記方法にしたがって、カチオン性基としての1-メチルイミダゾリウム基を有するオキシラン単量体単位の含有率を測定したところ、100モル%であった。
(イミダゾリウム構造含有ポリエーテル系重合体Eの合成)
アルゴンで置換した攪拌機付きガラス反応器に、テトラノルマルブチルアンモニウムブロミド0.322gとトルエン50mlを添加し、これを0℃に冷却した。次いで、トリエチルアルミニウム0.171g(テトラノルマルブチルアンモニウムブロミドに対して1.5当量)をノルマルヘキサン10mlに溶解したものを添加して、15分間反応させて、触媒組成物を得た。得られた触媒組成物に、エピクロロヒドリン17.0gを添加し、0℃において重合反応を行った。重合反応開始後、徐々に溶液の粘度が上昇した。12時間反応後、重合反応液に少量の水を注いで反応を停止した。得られた重合反応液を0.1Nの塩酸水溶液で洗浄することにより触媒残渣の脱灰処理を行い、さらにイオン交換水で洗浄した後に、有機相を50℃で12時間減圧乾燥した。これにより得られたオイル状の物質の収量は17.0gであった。また、得られたオイル状の物質のGPCによる数平均分子量(Mn)は17100、分子量分布(Mw/Mn)は1.2、繰り返し単位数(オキシラン単量体単位数)は185であった。以上より、得られたオイル状の物質は、重合開始末端にブロモメチル基を持ち、重合停止末端に水酸基を持つ、エピクロロヒドリン単位により構成されたポリエーテル系重合体E’’であると同定された。
(イミダゾリウム構造含有ポリエーテル系重合体Fの合成)
アルゴンで置換した攪拌機付きガラス反応器に、テトラノルマルブチルアンモニウムブロミド3.22gとトルエン100mlを添加し、これを0℃に冷却した。次いで、トリエチルアルミニウム1.370g(テトラノルマルブチルアンモニウムブロミドに対して1.2当量)をノルマルヘキサン10mlに溶解したものを添加して、15分間反応させて、触媒組成物を得た。得られた触媒組成物に、エピクロロヒドリン12.5g、およびプロピレンオキシド7.5gを添加し、0℃において重合反応を行った。重合反応開始後、徐々に溶液の粘度が上昇した。12時間反応後、重合反応液に少量の水を注いで反応を停止した。得られた重合反応液を0.1Nの塩酸水溶液で洗浄することにより触媒残渣の脱灰処理を行い、さらにイオン交換水で洗浄した後に、有機相を50℃で12時間減圧乾燥した。これにより得られたオイル状の物質の収量は19.9gであった。また、得られたオイル状の物質のGPCによる数平均分子量(Mn)は2030、分子量分布(Mw/Mn)は1.3、繰り返し単位数(オキシラン単量体単位数)は27であった。以上より、得られたオイル状の物質は、重合開始末端にブロモメチル基を持ち、重合停止末端に水酸基を持つ、エピクロロヒドリン単位およびプロピレンオキシド単位により構成されたポリエーテル系重合体F’であると同定された。なお、ポリエーテル系重合体F’の単量体組成比は、エピクロロヒドリン単量体単位50モル%、およびプロピレンオキシド単量体単位50モル%であった。
(イミダゾリウム構造含有ポリエーテル系重合体Gの合成)
アルゴンで置換した攪拌機付きガラス反応器に、テトラノルマルブチルアンモニウムブロミド0.32gとトルエン50mlを添加し、これを0℃に冷却した。次いで、トリエチルアルミニウム0.171g(テトラノルマルブチルアンモニウムブロミドに対して1.5当量)をノルマルヘキサン10mlに溶解したものを添加して、15分間反応させて、触媒組成物を得た。得られた触媒組成物に、エピクロロヒドリン14.0gを添加し、0℃において重合反応を行った。重合反応開始後、徐々に溶液の粘度が上昇した。12時間反応後、重合反応液に少量の水を注いで反応を停止した。得られた重合反応液を0.1Nの塩酸水溶液で洗浄することにより触媒残渣の脱灰処理を行い、さらにイオン交換水で洗浄した後に、有機相を50℃で12時間減圧乾燥した。これにより得られたオイル状の物質の収量は13.8gであった。また、得られたオイル状の物質のGPCによる数平均分子量(Mn)は14000、分子量分布(Mw/Mn)は1.2、繰り返し単位数(オキシラン単量体単位数)は152であった。以上より、得られたオイル状の物質は、重合開始末端にブロモメチル基を持ち、重合停止末端に水酸基を持つ、エピクロロヒドリン単位により構成されたポリエーテル系重合体G’であると同定された。
製造例1にて得られたポリエーテル系重合体A 100部、無機充填剤として、酸化亜鉛粉末(関東化学社製、平均粒子径5~10μm)407部、銀粉末(Aldrich社製、平均粒子径5~8μm)207部、溶剤として、N,N’-ジメチルアセトアミド(DMAc)714部を自動乳鉢に投入し、室温で30分間混合を行った。そして、得られた組成物を加熱しながら、さらに混合を行った後、真空乾燥機に入れて0.01MPa以下、60℃、12時間以上の条件下でさらに乾燥させることで、グリース状の重合体組成物を得た。そして、得られたグリース状の放熱用重合体組成物を用いて、上記方法にしたがって、熱伝導率、および長期保存後の分散性の各測定・評価を行った。結果を表1に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例2で得られたイミダゾリウム構造含有ポリエーテル系重合体B 100部を使用するとともに、銀粉末の代わりに、銅粉末(Aldrich社製、平均粒子径14~25μm)207部を使用した以外は、実施例1と同様にして、グリース状の放熱用重合体組成物を得て、同様に各測定・評価を行った。結果を表1に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例3で得られたイミダゾリウム構造含有ポリエーテル系重合体C 100部を使用した以外は、実施例1と同様にして、グリース状の放熱用重合体組成物を得て、同様に各測定・評価を行った。結果を表1に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例4で得られたイミダゾリウム構造含有ポリエーテル系重合体D 100部を使用した以外は、実施例1と同様にして、グリース状の放熱用重合体組成物を得て、同様に各測定・評価を行った。結果を表1に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例5で得られたイミダゾリウム構造含有ポリエーテル系重合体E 100部を使用するとともに、銀粉末の代わりに、銅粉末(Aldrich社製、平均粒子径14~25μm)207部を使用した以外は、実施例1と同様にして、グリース状の放熱用重合体組成物を得て、同様に各測定・評価を行った。結果を表1に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例6で得られたイミダゾリウム構造含有ポリエーテル系重合体F 100部を使用するとともに、銀粉末の代わりに、銅粉末(Aldrich社製、平均粒子径14~25μm)207部を使用した以外は、実施例1と同様にして、グリース状の放熱用重合体組成物を得て、同様に各測定・評価を行った。結果を表1に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例4で得られたイミダゾリウム構造含有ポリエーテル系重合体D 100部を使用するとともに、酸化亜鉛粉末および銀粉末の代わりに、窒化ホウ素粉末(デンカ社製、平均粒子径10~18μm)210部を使用した以外は、実施例1と同様にして、グリース状の放熱用重合体組成物を得て、同様に各測定・評価を行った。結果を表1に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例5で得られたイミダゾリウム構造含有ポリエーテル系重合体E 100部を使用するとともに、酸化亜鉛粉末および銀粉末の代わりに、窒化ホウ素粉末(デンカ社製、平均粒子径10~18μm)300部を使用した以外は、実施例1と同様にして、グリース状の放熱用重合体組成物を得て、同様に各測定・評価を行った。結果を表1に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、液状ブタジエンゴム(Aldrich社製、数平均分子量:3,000、分子量分布:1.5)100部を使用するとともに、溶剤として、N,N’-ジメチルアセトアミド(DMAc)の代わりに、トルエン714部を使用した以外は、実施例1と同様にして、放熱用重合体組成物を得た。なお、比較例1で得られた放熱用重合体組成物は、製造直後はグリース状であったが、時間経過とともに酸化亜鉛粉末および銀粉末が凝集してしまい、5日後には粉末状に変化してしまった。そして、このような粉末状の放熱用重合体組成物について、上記方法にしたがって、各測定・評価を行った。なお、比較例1においては、2ヶ月経過後の円板状試験片を用いて、熱伝導率の測定を試みたが、形状維持が困難であり測定することができなかった。結果を表2に示す。
液状ブタジエンゴムの代わりに、液状シリコーンゴム(Gelest社製、数平均分子量:6,000、分子量分布:2.1)100部を使用した以外は、比較例1と同様にして、放熱用重合体組成物を得た。なお、比較例2で得られた放熱用重合体組成物は、粉末状に凝集してしまい、そのため、グリース状の組成物として得ることができなかった。そして、得られた粉末状の放熱用重合体組成物について、上記方法にしたがって、各測定・評価を行った。なお、比較例2においては、2ヶ月経過後の円板状試験片を用いて、熱伝導率の測定を試みたが、形状維持が困難であり測定することができなかった。結果を表2に示す。
液状ブタジエンゴムの代わりに、高分子量スチレンブタジエンゴム(数平均分子量250,000、分子量分布:2.6)100部を使用するとともに、銀粉末の代わりに、銅粉末(Aldrich社製、平均粒子径14~25μm)207部を使用した以外は、比較例1と同様にして、放熱用重合体組成物を得た。なお、比較例3で得られた放熱用重合体組成物は、粉末状に凝集してしまい、そのため、グリース状の組成物として得ることができなかった。そして、得られた粉末状の放熱用重合体組成物について、上記方法にしたがって、各測定・評価を行った。なお、比較例3においては、2ヶ月経過後の円板状試験片を用いて、熱伝導率の測定を試みたが、形状維持が困難であり測定することができなかった。結果を表2に示す。
液状ブタジエンゴムの代わりに、高分子量シリコーンゴム(数平均分子量:63,000、分子量分布:2.3)100部を使用するとともに、銀粉末の代わりに、銅粉末(Aldrich社製、平均粒子径14~25μm)207部を使用した以外は、比較例1と同様にして、放熱用重合体組成物を得た。なお、比較例4で得られた放熱用重合体組成物は、粉末状に凝集してしまい、そのため、グリース状の組成物として得ることができなかった。そして、得られた粉末状の放熱用重合体組成物について、上記方法にしたがって、各測定・評価を行った。なお、比較例4においては、作製5日後および2ヶ月経過後のいずれにおいても円板状試験片を用いて、熱伝導率の測定を試みたが、形状維持が困難であり測定することができなかった。結果を表2に示す。
表1、表2に示すように、10~200個のオキシラン単量体単位からなるポリエーテル系重合体100部に対し、充填剤としての金属含有粉末を50部以上含有してなるポリエーテル系重合体組成物によれば、グリース状の組成物とすることができ、しかも、製造後5日後の熱伝導率が高く、熱伝導率に優れるものであり、さらには、2ヶ月後においても熱伝導率を良好に保つことができるとともに、長期保存後の分散性も良好であり、長期保存安定性にも優れるものであり、そのため、放熱用グリースとして好適に用いることのできるものであった(実施例1~8)。
製造例1にて得られたポリエーテル系重合体A 100部、無機充填剤として、銀粉末233部(Aldrich社製、平均粒子径5~8μm)、溶剤として、N,N’-ジメチルアセトアミド(DMAc)333部を自動乳鉢に投入し、室温で30分間混合を行った。そして、得られた組成物を加熱しながら、さらに混合を行った後、真空乾燥機に入れて0.01MPa以下、60℃、12時間以上の条件下でさらに乾燥させることで、ペースト状の重合体組成物を得た。そして、得られたペースト状の導電用重合体組成物を用いて、上記方法にしたがって、表面抵抗(電気伝導率)、および長期保存後の分散性の各測定・評価を行った。結果を表3に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例2で得られたイミダゾリウム構造含有ポリエーテル系重合体B 100部を使用した以外は、実施例9と同様にして、ペースト状の導電用重合体組成物を得て、同様に各測定・評価を行った。結果を表3に示す。
銀粉末の使用量を233部から400部に変更した以外は、実施例10と同様にして、ペースト状の導電用重合体組成物を得て、同様に各測定・評価を行った。結果を表3に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例7で得られたイミダゾリウム構造含有ポリエーテル系重合体G 100部を使用するとともに、銀粉末の使用量を233部から900部に変更した以外は、実施例9と同様にして、ペースト状の導電用重合体組成物を得て、同様に各測定・評価を行った。結果を表3に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、製造例4で得られたイミダゾリウム構造含有ポリエーテル系重合体D 100部を使用した以外は、実施例9と同様にして、ペースト状の導電用重合体組成物を得て、同様に各測定・評価を行った。結果を表3に示す。
製造例1にて得られたポリエーテル系重合体Aの代わりに、液状ブタジエンゴム(Aldrich社製、数平均分子量:3,000、分子量分布:1.5)100部を使用するとともに、溶剤として、N,N’-ジメチルアセトアミド(DMAc)の代わりに、トルエン333部を使用した以外は、実施例9と同様にして、導電用重合体組成物を得た。なお、比較例5で得られた導電用重合体組成物は、製造直後はペースト状であったが、時間経過とともに銀粉末が凝集してしまい、5日後には粉末状に変化してしまった。そして、このような粉末状の導電用重合体組成物について、上記方法にしたがって、各測定・評価を行った。なお、比較例5においては、2ヶ月経過後の試験片を用いて、表面抵抗(電気伝導率)の測定を試みたが、形状維持が困難であり測定することができなかった。結果を表4に示す。
液状ブタジエンゴムの代わりに、液状シリコーンゴム(Gelest社製、数平均分子量:6,000、分子量分布:2.1)100部を使用した以外は、比較例5と同様にして、導電用重合体組成物を得た。なお、比較例6で得られた導電用重合体組成物は、粉末状に凝集してしまい、そのため、ペースト状の組成物として得ることができなかった。そして、得られた粉末状の導電用重合体組成物について、上記方法にしたがって、各測定・評価を行った。なお、比較例6においては、作製5日後および2ヶ月経過後のいずれにおいても試験片を用いて、表面抵抗(電気伝導率)の測定を試みたが、形状維持が困難であり測定することができなかった。結果を表4に示す。
液状ブタジエンゴムの代わりに、高分子量スチレンブタジエンゴム(数平均分子量250,000、分子量分布:2.6)100部を使用した以外は、比較例5と同様にして、導電用重合体組成物を得た。なお、比較例7で得られた導電用重合体組成物は、粉末状に凝集してしまい、そのため、ペースト状の組成物として得ることができなかった。そして、得られた粉末状の導電用重合体組成物について、上記方法にしたがって、各測定・評価を行った。なお、比較例7においては、作製5日後および2ヶ月経過後のいずれにおいても試験片を用いて、表面抵抗(電気伝導率)の測定を試みたが、形状維持が困難であり測定することができなかった。結果を表4に示す。
液状ブタジエンゴムの代わりに、高分子量シリコーンゴム(数平均分子量:63,000、分子量分布:2.3)100部を使用した以外は、比較例5と同様にして、導電用重合体組成物を得た。なお、比較例8で得られた導電用重合体組成物は、粉末状に凝集してしまい、そのため、ペースト状の組成物として得ることができなかった。そして、得られた粉末状の導電用重合体組成物について、上記方法にしたがって、各測定・評価を行った。なお、比較例8においては、作製5日後および2ヶ月経過後のいずれにおいても試験片を用いて、表面抵抗(電気伝導率)の測定を試みたが、形状維持が困難であり測定することができなかった。結果を表4に示す。
表3,4に示すように、10~200個のオキシラン単量体単位からなるポリエーテル系重合体100部に対し、充填剤としての金属含有粉末を50部以上含有してなるポリエーテル系重合体組成物によれば、ペースト状の組成物とすることができ、しかも、製造後5日後の表面抵抗が低く、電気伝導性に優れるものであり、さらには、2ヶ月後においても表面抵抗を低く保つことができるとともに、長期保存後の分散性も良好であり、長期保存安定性にも優れるものであり、そのため、導電性ペーストとして好適に用いることのできるものであった(実施例9~13)。
Claims (10)
- 10~200個のオキシラン単量体単位からなるポリエーテル系重合体100重量部に対し、充填剤を50重量部以上含有してなるポリエーテル系重合体組成物。
- 前記充填剤が、金属含有粉末である請求項1に記載のポリエーテル系重合体組成物。
- 前記金属含有粉末が、金属粉末、金属酸化物粉末、および金属窒化物粉末から選択される少なくとも1種である請求項2に記載のポリエーテル系重合体組成物。
- 前記ポリエーテル系重合体を構成する前記オキシラン単量体単位の少なくとも一部が、カチオン性基を有するオキシラン単量体単位である請求項1~3のいずれかに記載のポリエーテル系重合体組成物。
- 前記カチオン性基が、カチオン性の窒素原子を含有する複素環を含んでなる基である請求項4または5に記載のポリエーテル系重合体組成物。
- 前記充填剤の平均粒径が、0.01μm以上、50μm未満である請求項1~6のいずれかに記載のポリエーテル系重合体組成物。
- 放熱用の重合体組成物である請求項1~7のいずれかに記載のポリエーテル系重合体組成物。
- 導電用の重合体組成物である請求項1~7のいずれかに記載のポリエーテル系重合体組成物。
- グリース状またはペースト状である請求項1~9のいずれかに記載のポリエーテル系重合体組成物。
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JP2020020952A (ja) * | 2018-07-31 | 2020-02-06 | キヤノン株式会社 | 電子写真用部材、プロセスカートリッジおよび電子写真装置 |
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JPWO2017170367A1 (ja) | 2019-02-07 |
EP3438204A4 (en) | 2019-12-18 |
EP3438204B1 (en) | 2021-03-24 |
JP6891876B2 (ja) | 2021-06-18 |
US10851203B2 (en) | 2020-12-01 |
US20190276600A1 (en) | 2019-09-12 |
CN108884310A (zh) | 2018-11-23 |
EP3438204A1 (en) | 2019-02-06 |
CN108884310B (zh) | 2021-05-14 |
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