WO2006059666A1 - リン含有被覆酸化マグネシウム粉末、その製造方法及びその粉末を含む樹脂組成物 - Google Patents
リン含有被覆酸化マグネシウム粉末、その製造方法及びその粉末を含む樹脂組成物 Download PDFInfo
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- WO2006059666A1 WO2006059666A1 PCT/JP2005/022051 JP2005022051W WO2006059666A1 WO 2006059666 A1 WO2006059666 A1 WO 2006059666A1 JP 2005022051 W JP2005022051 W JP 2005022051W WO 2006059666 A1 WO2006059666 A1 WO 2006059666A1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/02—Magnesia
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/028—Compounds containing only magnesium as metal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
- H01L23/29—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection characterised by the material, e.g. carbon
- H01L23/293—Organic, e.g. plastic
- H01L23/295—Organic, e.g. plastic containing a filler
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/564—Details not otherwise provided for, e.g. protection against moisture
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0373—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement containing additives, e.g. fillers
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0206—Materials
- H05K2201/0209—Inorganic, non-metallic particles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
Definitions
- the present invention relates to a phosphorus-containing coated magnesium oxide powder excellent in water resistance. More specifically, the present invention relates to a phosphorus-containing coated magnesium oxide powder having a very high water resistance when used as a heat radiating member filled in a resin, a method for producing the same, and a resin composition containing the powder. Related to things.
- An electronic device is composed of electronic components such as a laminate, a printed wiring board, and a multilayer wiring board.
- a resin composition is usually used as a pre-preda, a spacer, a sealant, an adhesive sheet, and the like, and various functions or properties are required for the resin composition.
- resin compositions and applied products are required to have better heat dissipation and water resistance than before. Has been.
- thermoplastic resin represented by the above engineering plastics. Since these resins require the same high rigidity and dimensional stability as metal, they are filled with a high percentage of inorganic fillers such as fibers, plates, and granules to improve the performance.
- a resin composition as a molding material is used. Therefore, in addition to the requirements for rigidity and dimensional stability, the resin composition is particularly required to improve heat dissipation characteristics.
- fillers used for a resin sealing resin composition for semiconductor sealing have conventionally been silicon dioxide (hereinafter referred to as silicon dioxide). Rica) and acid aluminum (hereinafter referred to as alumina) have been used.
- silicon dioxide hereinafter referred to as silicon dioxide
- alumina acid aluminum
- silica composition using silica as a filler which has a low thermal conductivity, is not sufficient to dissipate heat corresponding to an increase in heat generation due to high integration, high power and high speed. There were problems in the stable operation of semiconductors.
- magnesium oxide (MgO) which has a thermal conductivity one order of magnitude higher than that of silica and has a thermal conductivity equivalent to that of alumina, has been studied as a material for a resin sealing resin filler.
- MgO powder is more hygroscopic than silica powder. Therefore, when MgO powder is used as a resin sealing filler for semiconductors, moisture absorbed in water and MgO are hydrated, resulting in the occurrence of cracks in the resin composition due to the volume expansion of the filler and a decrease in thermal conductivity. Etc. had occurred.
- imparting water resistance to the MgO powder used as a semiconductor sealing resin filler has become a major issue in ensuring long-term stable operation of semiconductors.
- MgO powder is converted into C 1 or C 2
- Acidic phosphate ester having ⁇ C alkenyl group for example, C stearyl acid
- Patent Document 1 There has been proposed a highly acid- and water-resistant MgO powder obtained by surface treatment with phosphate to form an acidic phosphate compound coating (Patent Document 1).
- the improvement in water resistance is, for example, the effect of imparting water repellency due to the stearyl group of C.
- an aluminum (A1) salt or a key compound (Si) compound and MgO powder are mixed, and solids are separated by filtration, dried, and fired.
- a method for producing a coated MgO powder characterized by coating the surface of MgO powder with a coating layer containing a double oxide of A1 or Si and Mg has been proposed (see Patent Documents 2 and 3). .
- Patent Document 1 Japanese Patent Laid-Open No. 2001-115057
- Patent Document 2 Japanese Patent Laid-Open No. 2003-34522
- Patent Document 3 Japanese Patent Laid-Open No. 2003-34523
- An object of the present invention is to solve the above-mentioned problems, provide a coated MgO powder excellent in water resistance, and a method for producing the same, and further provide a water-resin excellent in water resistance containing the coated MgO powder. It is to provide a composition.
- the inventors of the present invention have made various studies in order to achieve the above object, and in order to improve the water resistance by complementing the incomplete region of the coating with the double oxide on the surface of the MgO powder.
- the idea was to form a coating layer of magnesium phosphate compound on the coating layer made of material.
- At least a part of the surface of the coated magnesium oxide powder having a surface coating layer made of a double oxide further has a coating layer made of a magnesium phosphate compound
- a phosphorus-containing coated magnesium oxide powder characterized in that the content of the magnesium phosphate compound in the coated magnesium oxide powder is 0.1 to 10% by mass in terms of phosphorus. Is done.
- the coated magnesium oxide powder having a surface coating layer of a double oxide is treated with a phosphorus compound and then baked at 300 ° C or higher, whereby the coated acid powder. Also provided is a method for producing a phosphorus-containing coated magnesium oxide powder characterized by forming a magnesium phosphate compound on at least a part of the surface of the magnesium powder.
- the phosphorus-containing coated MgO powder of the present invention is a coated Mg having a surface coating layer of a double oxide. o At least part of the powder surface has a coating layer of magnesium phosphate compound
- the surface of the coated MgO powder as a starting material for the phosphorus-containing coated MgO powder of the present invention is coated with a double oxide.
- the double oxide covering the surface of the MgO powder preferably contains magnesium, one or more elements that are selected from the group forces of aluminum, iron, silicon, and titanium.
- forsterite Mg SiO 2
- spinel Al MgO 2
- the content of the double oxide used in the present invention is preferably 5 to 50% by mass, more preferably 10 to 40% by mass. preferable.
- the content of the double oxide is in the above range, the surface of the MgO powder is coated with the double oxide, the water resistance is greatly improved, and the thermal conductivity of the resin composition after filling is also high.
- a heat conductive filler for example, when applied to a heat dissipation member, a sufficient effect can be exhibited.
- the average particle diameter of the coated MgO powder is preferably 5 X 10 _6 to 500 X 10 _6 m. 10 X 10 "6 to: L00 X 10 _6 m is more preferable.
- the BET specific surface area is 5 0 X 10 3 m 2 / kg or less is preferable 1. OX 10 3 m 2 / kg or less is more preferable.
- the phosphorus-containing coated MgO powder of the present invention is characterized in that it further has a coating layer made of a magnesium phosphate compound on at least a part of the surface of the above-mentioned double oxide-coated MgO powder.
- this magnesium phosphate compound is formed by a reaction between a phosphorus compound as a surface treatment agent and Mg on the MgO powder surface.
- the magnesium phosphate compound formed on the surface of the MgO powder coated with a double oxide such as forsterite may be, for example, magnesium (Si), aluminum (A1), There may be one or more of iron (Fe) or titanium (Ti).
- the phosphorus-containing coating M of the present invention is formed by the coating layer made of the above-described magnesium phosphate compound.
- the gO powder can have higher water resistance than the conventional coated MgO powder.
- the ratio of the magnesium phosphate compound to the coated MgO powder is 0.1 to L0% by mass, preferably 0.2 to 5% by mass in terms of phosphorus. More preferably, the content is 0.2 to 3% by mass.
- the coating layer made of a magnesium phosphate-based compound has at least a part of the surface of the double oxide-coated MgO powder, that is, a coating layer of double acid oxide is not formed, or the double acid It is necessary that the coating layer of the metal is formed in a relatively sparse region, but in fact, it is preferable that it is formed so as to cover the entire surface of the double oxide-coated MgO powder. .
- the greave composition of the present invention is obtained by incorporating the above phosphorus-containing coated MgO powder into greaves.
- the resin used is not particularly limited, and epoxy resin, phenol resin, polyimide resin, polyester resin, silicone resin, urea resin, melamine resin, alkyd resin, diallyl fatate Thermosetting resin such as oil and polyurethane resin, polycarbonate resin, polyphenylene sulfide resin, fluorine resin, polyamide resin, polyacetal resin, polybutylene terephthalate resin, polysulfone resin, polyamideimide resin Examples thereof include thermoplastic resins such as fat, polyetherimide resin, polyarylate resin, polyether ether ketone resin, and liquid crystal polymer. Of these, epoxy resin, silicone resin, and polyester-sulfide resin are preferable. Moreover, a hardener, a hardening accelerator, etc. can be mix
- epoxy resin bisphenol A epoxy resin, novolac type epoxy resin, bisphenol F epoxy resin, brominated epoxy resin, orthocresol novolac type epoxy resin, glycidyl ester resin, glycidyl Examples thereof include amine-based resins and heterocyclic epoxy resins.
- phenolic resin examples include novolak-type phenolic resin and resol-type phenolic resin.
- silicone resin examples include millable silicone rubber, condensation-type liquid silicone rubber, additive-type liquid silicone rubber, UV-curable silicone rubber, and the like, and addition-type liquid silicone rubber is preferable. Either one-pack type or two-pack type silicone rubber may be used, but two-pack type silicone rubber is preferred.
- a further filler can be blended in these greave compositions. Examples of the filler include, but are not limited to, fused silica and crystalline silica. Moreover, a mold release agent, a flame retardant, a coloring agent, a low stress imparting agent, etc. can be suitably mix
- the resin composition of the present invention can be used in a wide range of fields including electric / electronic applications and automotive applications.
- the electrical / electronic field it can be used for components for personal computers, mobile phone connectors, optical pickups, power modules, etc.
- technologies developed in the electrical / electronic field, such as power modules, are used in automobiles. Can also be used.
- examples of the heat radiating member using the resin composition include a heat radiating sheet, a heat radiating spacer, and a heat radiating grease.
- the heat-dissipating sheet is an electrically insulating heat-conductive sheet for removing heat generated by heat-generating electronic components and electronic devices, and is manufactured by filling a silicon rubber with a heat-conducting filler. Or it is used by attaching to a metal plate.
- the heat dissipation grease is the same as the heat dissipation sheet except that silicone oil is used instead of silicone rubber.
- the heat dissipating spacer has a thickness that fills the space between the exothermic electronic component and the electronic device to transfer the heat generated by the exothermic electronic component and the electronic device directly to the case of the electronic device. Silicone solidified
- the production method of the present invention is first carried out by producing a coated MgO powder having a double oxide coating layer on the surface.
- the coated MgO powder is spheroidized by melting at a high temperature to produce a coated MgO powder having a double oxide coating layer on the surface.
- the compound used to form the double oxide is an aluminum compound, an iron compound, It is preferable that the compound is one or more selected from the group force that also has a key compound and titanium compound strength.
- the form of the compound is not limited, but nitrate, sulfate, chloride, oxynitrate, oxysulfate, oxychloride, hydroxide and oxide are used. Specific examples of this compound include fumed silica, aluminum nitrate, iron nitrate and the like.
- the compounding amount of these compounds with respect to the MgO powder is preferably determined so that the content of the double oxide in the finally obtained coated MgO powder is 5 to 50% by mass with respect to MgO. 10 to 20% by mass is more preferable.
- the purity of the MgO powder is not particularly limited, and is preferably determined according to the application. For example, in order to satisfy the insulation characteristics of an electronic component, the purity is preferably 90% by mass or more, more preferably 95% by mass or more.
- the Mg 2 O powder having the characteristics of the present invention can be produced using a known method such as an electrofusion method or a sintering method.
- the double-acid oxide-coated MgO powder obtained as described above is subjected to a surface treatment with a phosphorus compound, and a coating layer of a magnesium phosphate-based compound is further formed on the surface.
- Examples of the phosphorus compound used for the surface treatment include phosphoric acid, phosphate, and acidic phosphoric acid ester. These may be used alone or in combination of two or more. May be.
- Examples of the phosphate include sodium phosphate, potassium phosphate, and ammonium phosphate.
- Examples of acidic phosphoric acid esters include isopropyl acid phosphate (PAP), methyl acid phosphate, ethyl acetate phosphate, propyl acid phosphate, butyl acid phosphate, lauryl acid phosphate, stearyl acid phosphate, and 2-ethyl acetate. Examples include xyl acid phosphate and oleyl acid phosphate.
- PAP can easily form a water-resistant coating layer made of a magnesium phosphate compound by reacting with MgO during the heat treatment in the surface treatment process described later, and has a small number of carbon atoms. For this reason, it is preferable because it has little organic residue during firing.
- the addition amount of the phosphorus compound in the surface treatment step described above is in the range of 0.1 to 10% by mass in terms of phosphorus, more preferably 0.2 to 5% by mass. the preferably 0.2 to 3 mass 0/0.
- the surface treatment with the phosphorus compound is performed by adding a predetermined amount of the phosphorus compound to the coated MgO powder, stirring for 5 to 60 minutes, and then at a temperature of 300 ° C or higher at 0.5 to It is carried out by baking for 5 hours.
- the firing temperature is low, for example, when PAP is used as the phosphorus compound, the organic component remains, and a covering layer made of the magnesium phosphate compound is formed. Further, when the firing temperature is high, the water resistance of the obtained coating layer is lowered.
- a preferred firing temperature is 300 to 900 ° C, and a more preferred firing temperature is 500 to 700 ° C.
- the phosphorous compound adhering to the surface of the coated MgO powder is not formed on the MgO powder surface, in particular, the double oxide coating layer, or the double oxide compound. It reacts with MgO in a region where the coating layer is very sparse to form a coating layer made of a magnesium phosphate-based compound having excellent water resistance.
- This coating layer made of a magnesium phosphate compound acts synergistically with the water resistance of the coating layer made of the double oxide of the coated MgO powder, compared to that formed by the double oxide coating layer alone.
- the water resistance of the MgO powder can be improved.
- the water resistance of the resin composition filled with this phosphorus-containing coated MgO powder can be dramatically improved, it is very useful in forming various heat radiation members.
- MgO powder (KMAO-H, manufactured by Tateho Chemical Co., Ltd.), which is an aggregate of single crystals with a crystallite size of 58.3 X 10 _ , is reduced to a particle size of 100 X 10 _6 m or less using an impact pulverizer. Crushed. Fumed silica (purity 99.9 mass 0/0 or more, the specific surface area 200 ⁇ 20m 2 / g), and then wet ⁇ Ka ⁇ as mixing ratio to Mg O is 10% by weight, in 400 ⁇ 500rpm Stir for 10 minutes Stir mixed. After stirring and mixing, the cake obtained by filtration and dehydration was dried overnight at 130 ° C. using a dryer.
- the dried cake was crushed with a sample mill, adjusted to the same particle size as the raw material MgO powder, and obtained with MgO powder with silica on the surface.
- This powder is fed into a high-temperature flame formed by the combustion of LPG and oxygen, and melted and spheroidized!
- a spherical coated MgO powder coated with forsterite (Mg 2 SiO 3) was obtained.
- Synthesis Example 1 instead of melting and spheroidizing treatment, after firing in air at 1400 ° C for 1 hour, the sample is crushed again and adjusted to the same particle size as the raw MgO powder. A coated MgO powder coated with forsterite (Mg SiO 2) was obtained.
- Ig-loss (A) of the sample is measured.
- the sealed container containing 5 g of the sample and 100 ml of water is allowed to stand in a dryer at a predetermined temperature for a predetermined time, and then Ig-loss (B) of the sample is measured.
- a phosphorus-containing coated MgO powder was prepared in the same manner as in Example 1 except that the amount of PAP added was variously changed, and the same water resistance test was performed. The results are shown in Table 1.
- a phosphorus-containing coated MgO powder was prepared in the same manner as in Example 1 except that the calcination temperature after addition of PAP was variously changed, and the same water resistance test was conducted. The results are shown in Table 1. .
- Example 9 Except that the powder produced in Synthesis Example 1 was used, a spherical coated MgO powder obtained by PAP treatment in the same manner as in Example 1 was obtained, and a water resistance test was conducted in the same manner. The results are shown in Table 1. .
- the phosphorus compound to be added was changed to 2-ethylhexyl acid phosphate (Johoku Chemical Industry Co., Ltd., JP508), oleyl acid phosphate (Johoku Chemical Industry Co., Ltd., JP51 80) and phosphoric acid. Except for the above, a coated MgO powder was obtained in the same manner as in Example 1, and a water resistance test was conducted in the same manner. The results are shown in Table 1.
- the coated spherical MgO powder prepared in Synthesis Example 1 was used as it was without being treated with a phosphorus compound, and a water resistance test similar to that of Example 1 was performed. The results are shown in Table 1.
- the coated MgO powder prepared in Synthesis Example 2 was used as it was without being treated with a phosphorus compound, and a water resistance test similar to that of Example 1 was performed. The results are shown in Table 1.
- MgO powder (KMAO-H, manufactured by Tateho Chemical Co., Ltd.), which is an aggregate of single crystals with a crystallite size of 58.3 X 10 _ , is reduced to a particle size of 100 X 10 _6 m or less using an impact pulverizer. Crushed.
- the MgO powder was placed in a Henschel mixer, the PAP was 5 mass 0/0 ⁇ Ka ⁇ After stirring treatment for 10 minutes to obtain a MgO powder PAP treated calcined 1 hour at 500 ° C.
- the water resistance of this powder was evaluated in the same manner as in Example 1, and the results are shown in Table 1.
- MgO powder crystallite size of single crystal aggregate of 58. 3 X 10 _9 m (Tateho Chemical Industries Co., Ltd. Ltd., KMAO- H) and, using the impact mill, the particle size 100 X 10 _6 m It was pulverized below.
- This MgO powder was put into a Henschel mixer, 1% by mass of oleyl acid phosphate (Johoku Chemical Industry Co., Ltd., JP51SO) was added, stirred and mixed for 10 minutes, dried at 120 ° C, and treated with oleyl acid phosphate. MgO powder was obtained. The water resistance of this powder was evaluated in the same manner as in Example 1, and the results are shown in Table 1. From the above results, the following became clear.
- Double oxide MgO powder coated with a magnesium phosphate compound of the present invention (Example 1 12) is a double oxide MgO powder not coated with a magnesium phosphate compound Compared with (Comparative Examples 2 and 3), it is superior in water resistance, and the water resistance in a harsh environment of 95 ° CX 120 hours is also greatly improved.
- a good range of increase in Ig-1 oss in the water resistance evaluation test of the phosphorus-containing coated MgO powder of the present invention shown in Table 1 is 10% by mass or less, preferably 5% by mass or less.
- the phosphorus-containing coated MgO powder of the present invention is obtained by subjecting the coated MgO powder to surface treatment with a phosphorus compound and then firing at 300 ° C or higher to thereby form magnesium phosphate on the surface. Since a coating layer made of a compound is formed, it has excellent water resistance. Sarakuko, the resin composition obtained by filling this phosphorus-containing coated MgO powder into the resin, and the heat-dissipating member made of the molded product also have excellent water resistance and overcome recent severe water resistance conditions. Therefore, its industrial value is extremely high in various engineering plastics fields.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/597,007 US7393885B2 (en) | 2004-12-01 | 2005-12-01 | Phosphorus-containing coated magnesium oxide powder, method for producing same, and resin composition containing such powder |
EP05811536A EP1818311A4 (en) | 2004-12-01 | 2005-12-01 | PHOSPHORUS-COATED MAGNESIUM OXIDE POWDER, ASSOCIATED PREPARATION METHOD AND RESIN COMPOSITION THEREOF |
Applications Claiming Priority (2)
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JP2004-348464 | 2004-12-01 | ||
JP2004348464A JP4315895B2 (ja) | 2004-12-01 | 2004-12-01 | リン含有被覆酸化マグネシウム粉末、その製造方法及びその粉末を含む樹脂組成物 |
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WO2006059666A1 true WO2006059666A1 (ja) | 2006-06-08 |
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US (1) | US7393885B2 (ja) |
EP (1) | EP1818311A4 (ja) |
JP (1) | JP4315895B2 (ja) |
KR (1) | KR100799042B1 (ja) |
CN (1) | CN100509630C (ja) |
TW (1) | TW200621641A (ja) |
WO (1) | WO2006059666A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008074683A (ja) * | 2006-09-25 | 2008-04-03 | Tateho Chem Ind Co Ltd | 被覆酸化マグネシウム粉末、その製造方法及びそれを含む樹脂組成物 |
WO2008066051A1 (fr) * | 2006-11-29 | 2008-06-05 | Polyplastics Co., Ltd. | Composition de résine thermiquement conductrice |
JP2017226749A (ja) * | 2016-06-22 | 2017-12-28 | 住友金属鉱山株式会社 | 熱伝導性グリース組成物およびその製造方法 |
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- 2005-12-01 EP EP05811536A patent/EP1818311A4/en not_active Withdrawn
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JP2017226749A (ja) * | 2016-06-22 | 2017-12-28 | 住友金属鉱山株式会社 | 熱伝導性グリース組成物およびその製造方法 |
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US7393885B2 (en) | 2008-07-01 |
JP2006151778A (ja) | 2006-06-15 |
EP1818311A1 (en) | 2007-08-15 |
CN1930084A (zh) | 2007-03-14 |
KR20070055995A (ko) | 2007-05-31 |
US20070184269A1 (en) | 2007-08-09 |
JP4315895B2 (ja) | 2009-08-19 |
CN100509630C (zh) | 2009-07-08 |
KR100799042B1 (ko) | 2008-01-28 |
EP1818311A4 (en) | 2009-07-22 |
TW200621641A (en) | 2006-07-01 |
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