WO2004080897A1 - 耐熱性水酸化アルミニウム及びその製造方法 - Google Patents
耐熱性水酸化アルミニウム及びその製造方法 Download PDFInfo
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- WO2004080897A1 WO2004080897A1 PCT/JP2004/002886 JP2004002886W WO2004080897A1 WO 2004080897 A1 WO2004080897 A1 WO 2004080897A1 JP 2004002886 W JP2004002886 W JP 2004002886W WO 2004080897 A1 WO2004080897 A1 WO 2004080897A1
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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
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
- C09K21/02—Inorganic materials
-
- 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
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/447—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by wet processes
- C01F7/448—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by wet processes using superatmospheric pressure, e.g. hydrothermal conversion of gibbsite into boehmite
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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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
Definitions
- the present invention relates to a novel aluminum hydroxide which has a high dehydration temperature and maintains a sufficient amount of dehydration, and is particularly suitable as a flame retardant for a synthetic resin and a method for producing the same.
- Examples of the flame retardant include phosphorus-based (JP-A-2002-80633), halogen-based (JP-A-8-291128), and inorganic hydroxide of aluminum hydroxide (JP-A-2002-338816). Gazette
- aluminum hydroxide (Al (OH) 3 ) is particularly rich in structural water and has excellent flame retardant effects, as well as excellent acid resistance and excellent resistance to alcohol, and costs. It is widely used because it is also advantageous.
- Al (OH) 3 aluminum hydroxide
- dehydration starts gradually from about 200 ° C and dehydrates at a stretch from 230 ° C to 250 ° C.
- thermoplastic resins have molding temperatures around the temperature range where aluminum hydroxide is dehydrated, and dehydration of aluminum hydroxide causes bubbles to form inside the synthetic resin molded product, resulting in foaming on the surface of the molded product. It appeared that it could lower the yield.
- Thermosetting resin is often molded at a lower temperature than thermoplastic resin, but it is sometimes used at high temperature due to the characteristics of this synthetic resin. In many cases, depending on the environmental temperature used, aluminum hydroxide was dehydrated, and the yield and physical properties of the molded product were sometimes reduced. For example, when a thermosetting resin is used for an electronic substrate, the environmental temperature when soldering on the electronic substrate is about 230 ° C, so that aluminum hydroxide dehydrates and the electronic substrate is dehydrated. In some cases reduced the yield.
- the present invention has a high dehydration temperature, does not cause foaming due to dehydration at the molding temperature of the synthetic resin or the ambient temperature at which the synthetic resin is used, does not reduce the yield of the synthetic resin product, and maintains a sufficient amount of dehydration to provide a flame retardant property. It is an object of the present invention to provide aluminum hydroxide having excellent heat resistance and a method for producing the same.
- the heat-resistant aluminum hydroxide of the present invention which solves the above object, is obtained by subjecting a mixture of aluminum hydroxide and a reaction retarder to a raw material and subjecting it to a hydrothermal treatment or heating in a steam atmosphere. It can be manufactured by pressure and heating.
- heat-resistant aluminum hydroxide means that the formation of boehmite is suppressed by hydrothermal treatment in a high-temperature range, or by pressurizing and heating in a steam atmosphere, and the dehydration temperature is maintained while maintaining a sufficient amount of dehydration.
- hydrothermal treatment means that a mixture of aluminum hydroxide and a reaction retardant is mixed with water that has a saturated steam amount or more, and is subjected to heat treatment using a pressure vessel such as an autoclave (hereinafter, this is referred to as wet treatment). There is).
- the treatment by pressurizing and heating in a steam atmosphere means that a mixture of aluminum hydroxide and a reaction retardant is not added with water, or water with a saturated steam amount or less is used and a pressure vessel such as an autoclave is used. Pressurization and treatment (hereinafter sometimes referred to as dry treatment).
- the heat-resistant aluminum hydroxide of the present invention can be produced by heating a raw material obtained by mixing aluminum hydroxide and a reaction retarder for delaying boehmite formation in a pressure vessel without adding water. Heating in a pressure vessel without adding water to the raw material means that heat treatment is performed without adding water to the raw material and generating steam other than dehydrating and steaming a part of the raw material aluminum hydroxide by heating. (Hereinafter, sometimes referred to as dry processing). Further, in addition to the vapor pressure by the steam, compressed air may be sent from the outside into the pressure vessel and pressurized.
- a reaction retarder is a substance that delays the formation of aluminum hydroxide in a wet process or a dry process, and has a high heat history (aluminum hydroxide is 100%).
- reaction retarder (0 ° C / 3 hours)
- almost 100% boehmite is formed.
- the book The use of the reaction retarder in the invention can sufficiently suppress the boehmite conversion rate of aluminum hydroxide even when subjected to a high heat history, for example, wet treatment or dry treatment at 215 ° C for 10 hours. And the dehydration temperature can be significantly increased.
- the mechanism for raising the dehydration temperature is as follows: (1) The crystal structure of aluminum hydroxide is rearranged due to the high thermal history, and the A1-O bond is strengthened. A trace amount dissolves and precipitates, the surface of the aluminum hydroxide becomes smooth, and the number of dehydration start points is reduced. , And subsequent dehydration occurs in a chain).
- the treatment temperature in the wet treatment or the dry treatment can be from 170 ° C. to 300 ° C., preferably from 200 ° C. to 250 ° C. This is because if the treatment temperature is too low, the dehydration temperature cannot be sufficiently increased, and if the treatment temperature is high, the heat history becomes higher, which is preferable. In addition to having to increase the amount of retarder, the pressure during processing becomes so high that autoclaving equipment becomes impractical.
- the processing time in the wet processing or the dry processing can be 1 hour to 24 hours, preferably 5 hours to 10 hours. This is because if the treatment time is short, the dewatering temperature cannot be sufficiently increased, and if the treatment time is long, the heat history becomes high, which is preferable. This is because the amount of the reaction retarder must be increased.
- the reaction retarder is not particularly limited as long as it satisfies the above definition, but is not limited to sulfuric acid, nitric acid, phosphoric acid, tetrafluoroboric acid, ammonium hydrogen phosphate, sodium dihydrogen bisphosphate and water Inorganic acids or salts thereof such as hydrates, sodium dihydrogen phosphate and potassium metaphosphate, organic acids or salts thereof such as acetic acid, succinic acid, lactic acid, fumaric acid, tartaric acid, silica, silane coupling agent, white carbon, Examples thereof include silicon compounds such as bexafluorokeic acid, sodium hexafluorokerate, potassium fluoride, aluminum fluoride, fly ash, diatomaceous earth, and siloxane, and fluorine compounds.
- the fluorine compound means a compound widely including compounds containing elemental fluorine, and the above tetrafluoroboric acid is an inorganic acid. At the same time, it is also a fluorine compound.
- Hexafluorocarboxylic acid, sodium hexafluorocarbonate and potassium fluoride are both silicon compounds and fluorinated compounds.
- silicon compounds and fluorine compounds are preferable, and amorphous silica, white carbon, hexafluorokeic acid, sodium hexafluorokerate, potassium fluoride, aluminum fluoride, and tetrafluoride are preferred. Acids are more preferred.
- the silicon compound and the fluorine compound have a higher dehydration temperature than other acids even under the same processing conditions, and show favorable results because these compounds have not only a reaction delay effect but also a glassy layer on the aluminum hydroxide surface. It has the effect of accelerating the formation of aluminum or forming a coating layer on the surface of the aluminum hydroxide. It is presumed that these layers need to be broken and dehydrated during heating and dehydration, so that the dehydration temperature will rise. Also, two or more reaction retarders can be used in combination.
- the amount of the reaction retarder to be mixed with the aluminum hydroxide is preferably 0.05 to 10 parts by weight, more preferably 0.1 to 5 parts by weight, and more preferably 0.3 to 100 parts by weight of aluminum hydroxide. ⁇ 3 parts by weight is most preferred. If the amount is less than 0.05 parts by weight, the boehmite conversion of aluminum hydroxide cannot be sufficiently suppressed, and if the amount is more than 10 parts by weight, the reaction retarder may be mixed as impurities into the aluminum hydroxide. Also, even if there is no actual harm as an impurity, if it exceeds 10 parts by weight, the amount of dehydration relatively decreases. In the field of flame retardants, it is common practice to mix aluminum hydroxide flame retardants with phosphorus-based, nitrogen-based, or other inorganic flame retardants to produce a synergistic effect. Can exceed this range.
- the present inventors have previously proposed a flame-retardant filler composed of aluminum hydroxide-composite of boehmite, which is produced by hydrothermal treatment using aluminum hydroxide as a raw material (Japanese Patent Application No. 200-200). 2—10 3 1 4 6).
- the higher the boehmite conversion ratio the higher the dehydration temperature of aluminum hydroxide, but the total amount of dehydration decreases, and the lower the boehmite conversion ratio, the lower the dehydration temperature of aluminum hydroxide.
- the heat-resistant aluminum hydroxide of the present invention can increase the dehydration temperature by suppressing the formation of aluminum hydroxide with a high heat history and can maintain a sufficient dehydration amount. However, it greatly improves the conflicting relationship between the dehydration temperature and the amount of dehydration. More specifically, a 1% dehydration temperature, that is, a temperature at which 1% of the total weight of the flame retardant is dehydrated relative to the total weight of the flame retardant dewatered in the synthetic resin is not subjected to hydrothermal treatment.
- the aluminum hydroxide is about 210 to 230 ° C, whereas the heat-resistant aluminum hydroxide of the present invention is at least 245 ° C, most of which is at least 250 ° C.
- the heat-resistant aluminum hydroxide of the present invention includes a mixture of aluminum hydroxide and boehmite, which partially progresses to boehmite, but preferably has a total dehydration of 30% or more. More preferably, the total dehydration rate is 14% or less and the total dehydration amount is 32% or more, and most preferably, the total dehydration rate is 35% and the total dehydration rate is 0%. Good to be.
- the heat-resistant aluminum of the present invention preferably has a 1% dehydration temperature of 255 ° C. or more and a total dehydration amount of 30% or more.
- the average of the raw material aluminum hydroxide is preferable.
- the particle size is less than 2.5 ⁇ m.
- the heat-resistant aluminum hydroxide of the present invention has a high dehydration temperature and a sufficient dehydration amount, it can be used as a flame retardant for either a thermoplastic resin or a thermosetting resin.
- Synthetic resins can be used irrespective of flammability or flame retardancy.For example, methyl methacrylic resin, acryl-styrene copolymer resin, ABS resin, polystyrene, polyethylene, polypropylene, polycarbonate, phenolic resin, urea resin, It can be used for various synthetic resins such as melamine resin, epoxy resin, unsaturated polyester and diaryl phthalate.
- the flame retardancy of an additive such as a synthetic resin can be remarkably improved.
- FIG. 1 is a thermogravimetric curve of Example 7 and Comparative Example 1. BEST MODE FOR CARRYING OUT THE INVENTION
- Examples 1 to 19 (Production of heat-resistant aluminum hydroxide 1)
- Examples 1 to 11 are commercially available aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd .; hereinafter, C-303)
- Examples 12 to 13 are commercially available aluminum hydroxide (manufactured by Nippon Light Metal Co., Ltd .; hereinafter, B703)
- Example 14 is commercially available aluminum hydroxide (manufactured by Nippon Light Metal Co., Ltd .; hereinafter, B1 40 3)
- Example 15 is a commercially available aluminum hydroxide (manufactured by Nippon Light Metal Co., Ltd .; hereinafter, BF013)
- Examples 16 and 17 are commercially available aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd .; hereinafter, C-305) and Examples 18 and 19 each used 400 g of commercially available aluminum hydroxide (H-42M, manufactured by Showa Denko KK).
- Lactic acid (Kanto Kagaku), phosphoric acid (Kanto Kagaku), ammonium hydrogen phosphate (Kanto Kagaku), silica (Nippon Silica Kogyo), silane coupling agent (Kanto Kagaku)
- FZ-3794 manufactured by Nippon Tunicer Co., Ltd.
- White Power Ibon Carplex CS-5, manufactured by Shionogi & Co., Ltd.
- C-303 is aluminum hydroxide having an average particle size of 2.5 ⁇ manufactured by the precipitation method
- ⁇ 703 is an aluminum hydroxide having an average particle size of 2.5 ⁇ manufactured by the pulverization method.
- Aluminum hydroxide, B1403 is aluminum hydroxide with an average particle size of 1 ⁇ produced by the pulverization method
- BF013 is aluminum hydroxide with an average particle size of 1 produced by the precipitation method.
- Aluminum, C-305 is aluminum hydroxide with an average particle diameter of 0.8 ⁇ manufactured by the precipitation method
- 4-42 is an aluminum hydroxide with an average particle diameter of 1 ⁇ manufactured by the precipitation method. It is aluminum hydroxide.
- the processing temperature and processing time of the reaction conditions are as shown in Table 1.
- Example 3 aluminum hydroxide and a reaction retarder shown in Table 1 were stirred for 30 seconds by a mixer.
- the mixture was put into a stainless steel pad and cured with an autoclave (manufactured by Osaka Boiler Mfg. Co., 0.4 m 3 , autoclave with electric heater and steam generator) at a predetermined temperature for a predetermined time.
- the obtained reaction product was dried to obtain a desired heat-resistant aluminum hydroxide colorless powder (dry treatment).
- Examples 1 and 2 were used for lactic acid and phosphoric acid, respectively.
- Comparative Examples 1 to 3 are C_303
- Comparative Example 4 is B703
- Comparative Example 5 is B1403
- Comparative Example 6 is BF013
- Comparative Examples 7 to Comparative Example 9. was subjected to a C-305 test and Comparative Example 10 was subjected to a H-42M test of 400 g each.
- Comparative Examples 1, 4, 5, 6, 9, and 10 aluminum hydroxide was not treated.
- Comparative Examples 2, 7, 11, 11 and 12 were subjected to dry treatment
- Comparative Examples 3 and 8 were subjected to wet treatment by adding water.
- the boehmite conversion rate is determined by hydrothermal treatment or
- boehmite conversion rate was calculated as the following formula based on the theoretical values of the total dehydration amount of pure aluminum hydroxide and boehmite being 34.6% and 15%, respectively. .
- the 1% dehydration temperature was set to a temperature at which the temperature was increased based on the dewatering amount of 100 ° C., and 1% of all samples decreased.
- the total amount of dehydration was determined by increasing the temperature based on the amount of dehydration at 100 ° C. and decreasing the amount to 600 ° C.
- % in the total amount of dehydration is the percentage of the weight of water to be dehydrated with respect to the weight of aluminum hydroxide.
- the 1% dehydration temperature and the total dehydration amount were measured by thermogravimetry using a thermal analyzer (manufactured by Bruker AXS). The measurement was performed in the atmosphere at a temperature rise of ⁇ ⁇ in ⁇ in and a temperature rise of 1 O ⁇ Zm in. Equation 1
- the results are shown in Table 1 below.
- the 1% dehydration temperature of the C-303 test group was higher in the range of 20 to 38 ° C in Comparative Example 1 than in Comparative Example 1 in which aluminum hydroxide was not treated.
- the total amount of dehydration maintained a sufficient amount of dehydration equivalent to that of Comparative Example 1 except for Example 3.
- Comparative Example 2 in which 100% boehmite was formed was not measured because the 1% dehydration temperature was about 500 ° C., but the total dehydration amount was as extremely low as 15%.
- the 1% dehydration temperature of the B703 test group was 16 ° C higher in both Examples 12 and 13 than in Comparative Example 4 in which aluminum hydroxide was not treated, while the difference in the total dehydration amount was almost the same. None (Examples 13 and 13 were the same as Comparative Example 4).
- the 1% dehydration temperature of the B1403 test group was 23 ° C higher in Example 14 than that of Comparative Example 5 in which aluminum hydroxide was not treated, and there was no difference in the total dehydration amount.
- the 1% dehydration temperature was 28 ° C higher in Example 15 than in Comparative Example 6, which was not treated with aluminum hydroxide, and there was no difference in the total dehydration amount.
- the 1% dehydration temperature of the C-1 3005 test group was 34 ° C and 37 ° C higher in Examples 16 and 17 compared to Comparative Example 9 in which aluminum hydroxide was not treated. Did not.
- Comparative Examples 7 and 8 partially boehmite-based aluminum hydroxide produced using only aluminum hydroxide as a raw material
- the 1% dehydration temperature of Examples 16 and 17 was 12 to 12%. High in the range of 23 ° C and the total dehydration amount was higher in the examples
- the 1% dehydration temperature of the H-42M test group was 28 ° C and 33 ° C higher in Examples 18 and 19, respectively, compared to Comparative Example 10 in which aluminum hydroxide was not treated. The amount was not different between Example 19 and Comparative Example 10.
- the heat-resistant aluminum hydroxide of the example can suppress the formation of a mite even with a high heat history (high processing temperature and long processing time), significantly increase the dehydration temperature, and achieve sufficient dehydration. It proved to be an unprecedented new aluminum hydroxide that holds the quantity.
- the difference between the raw materials of aluminum hydroxide There was no significant difference between the test groups due to the above.
- the Example had a remarkably higher 1% dehydration temperature and a sufficient dehydration amount as compared with the Comparative Example.
- Example 2 ⁇ to Example 40 (Production of heat-resistant aluminum hydroxide 2) Heat-resistant aluminum hydroxide was produced under predetermined conditions using the reaction retarder shown in Table 2.
- Example 20 to 39 C_303 was used as the raw material aluminum hydroxide, and in Example 40, BF083 (manufactured by Nippon Light Metal Co., Ltd., average particle size: 8 m) was used. Except for Examples 25, 26, 36 and 37, heat-resistant aluminum hydroxide was produced in the same manner as in Examples 3 to 19 in (Production of heat-resistant aluminum 1) above (dry processing). In Example 25, 50 g of aluminum hydroxide was mixed with 1 g of white carbon with a mixer, and the mixture was produced using an autoclave (manufactured by Osaka Boiler Mfg. Co., Ltd., volume: 100 m1, pressure resistance: 5 MPa, external heating autoclave). did.
- Example 26 was prepared by mixing 10 kg of white carbon with 500 kg of aluminum hydroxide using a mixer and using an autoclave (manufactured by Osaka Boiler Mfg. Co., Ltd., volume: 3.6 m 3 , pressure resistance: 3 MPa, steam-supply autoclave). did.
- 100 g of aluminum hydroxide was prepared by mixing 2 g (2 parts by weight) of white carbon with autoclave (manufactured by Osaka Boiler Mfg. Co., Ltd., volume 5 L, pressure resistance 3 MPa, external heating autoclave). (100 parts by weight), and heat-treated at 200 ° C. for 5 hours without adding excessive water or water vapor (under the condition that the steam is not saturated).
- Example 37 600 g of aluminum hydroxide (1 part by weight, 2 g by weight) mixed with 12 g (2 parts by weight) of white carbon was mixed with autocrepe (manufactured by Osaka Boiler Mfg. Co., Ltd., volume 5 L, pressure resistance 3 MPa, external heating autoclave). (00 parts by weight) and pressurized to 700 kPa with compressed air from outside at room temperature (20 ° C) without adding excessive water or steam (conditions under which the steam is not saturated) It was manufactured by heat treatment at 200 ° C for 12 hours.
- the white carbon used was -Pipsil LP (manufactured by TOSHI-SILICA CORPORATION).
- Comparative Examples 11 and 12 were manufactured in the same manner as in Examples 3 to 19 of (Production of heat resistant aluminum 1) above, using C_303 as the raw material aluminum hydroxide. (Dry processing). Comparative Example 13 is BF083 of aluminum hydroxide as a raw material.
- Example 20 0 to 38 and Comparative Example 11 About the conversion rate of 1 to 13 to 1% dehydration temperature (° C) and total dehydration amount (%) (Production of heat-resistant aluminum hydroxide 1) The measurement was performed in the same manner as described in. The results are shown in Table 2.
- Examples 20 to 40 all had a high 1% dehydration temperature and maintained a high total dehydration amount.
- the amount of silica added as a reaction retarder was small, so that it became 100% boehmite, and the total amount of dehydration was less than half the amount of the Example.
- Comparative Example 13 although the total dehydration was high, the dehydration temperature was low.
- the heat-resistant aluminum hydroxide of the present invention When the heat-resistant aluminum hydroxide of the present invention is added to a printed wiring board, dehydration of 0.5% or more may not be allowed.Therefore, for the specific examples and comparative examples described in Tables 1 and 2 below, 0. Table 3 shows the 5% dehydration temperature.
- the 0.5% dehydration temperature is the temperature at which 0.5% of the total weight of aluminum hydroxide dehydrates. As is clear from Table 3, even at the 0.5% dehydration temperature, the example maintained a higher dehydration temperature than the comparative example.
- FIG. 1 shows the thermogravimetric curves of Example 7 and Comparative Example 1 in Table 3. It can be seen that there is a clear difference between the 0.5% dehydration temperature and the 1% dehydration temperature.
- Example 9 the heat-resistant aluminum hydroxide of Example 9 was kneaded into polypropylene (pp) as a flame retardant, and the state of the resin extruded from the die was visually observed to confirm the presence or absence of foaming.
- pp polypropylene
- a commercially available hydroxide was used as a comparative example.
- Lumi Pum (untreated) was kneaded in and checked for foaming.
- Resin kneading equipment Ikegai Iron Works PCM 45 (45 mm diameter, twin screw extruder) Cylinder temperature: 200 to 230 ° C (set temperature)
- the compound was manufactured using a twin-screw extruder (KZW15 TW-45MG-NH (-700) manufactured by Technobel Co., Ltd.) and 100 parts by weight of raw material polypropylene (PP) by an automatic weighing hopper. 100 parts by weight of each of the aluminum hydroxides of Examples and Comparative Examples produced in Tables 1 and 2 were supplied.
- the feed rate was 2 kgZhr for the entire raw material, and after melt kneading at a predetermined temperature, the extruded 2 mm diameter strand (resin compound on the wire) was checked for the foaming state. Since the foamed strand has bubbles inside and has irregularities on the surface, the presence or absence of foaming was evaluated based on this. (No foaming: ⁇ , foamed: X).
- Example 23 From Table 4, it can be seen from Table 4 that the aluminum hydroxide of the comparative example was foamed at a low temperature, but the aluminum hydroxide of the example was not foamed even at a high temperature molding. The product yield is improved even at relatively high temperatures. In the examples, those having a larger average particle diameter had higher heat resistance.
- Example 8 100 parts by weight of the epoxy resin was mixed with 100 parts by weight of the aluminum hydroxide of Example 8 and Comparative Example 1 described in Table 1, and the mixture was cast into a film and dried at 200 ° C. And cured.
- An epoxy resin film containing aluminum hydroxide was treated in a reflow furnace under the following conditions to evaluate the presence or absence of foaming. As shown in Table 6, the film blended with Example 8 had no foaming, but the film blended with Comparative Example 1 had foaming.
- the heat-resistant aluminum hydroxide of the present invention can raise the dehydration temperature and maintain a sufficient total dehydration amount as compared with the existing aluminum hydroxide, so that it is extremely useful as a flame retardant, and can be used for molding synthetic resins.
- foaming in the synthetic resin molded article caused by dehydration of the flame retardant is reliably avoided, and the production efficiency is increased without lowering the yield of the synthetic resin molded article, thereby contributing to cost reduction. It can exhibit an excellent flame retardant effect.
- the heat-resistant aluminum hydroxide of the present invention can be expected to be used in other applications besides flame retardants by utilizing the property of maintaining a sufficient total dehydration amount while increasing the dehydration temperature compared to existing aluminum hydroxide. .
- the method for producing a heat-resistant aluminum hydroxide of the present invention can increase the dehydration temperature, maintain a sufficient total dehydration amount, and produce aluminum hydroxide which is extremely useful as a flame retardant.
- the method for producing a heat-resistant aluminum hydroxide in which a raw material obtained by mixing the aluminum hydroxide of the present invention and a reaction retarder for delaying boehmite formation is heated in a pressure vessel without adding water is used.
- the pressure during production is lower than the saturated steam, and it can be produced in a pressure vessel designed to withstand low pressure, reducing capital investment and reducing production costs.
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Priority Applications (4)
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JP2005503509A JP4614354B2 (ja) | 2003-03-10 | 2004-03-05 | 耐熱性水酸化アルミニウム及びその製造方法 |
EP04717781.1A EP1604951B1 (en) | 2003-03-10 | 2004-03-05 | Heat-resistant aluminum hydroxide and method for preparation thereof |
KR1020057016145A KR101085003B1 (ko) | 2003-03-10 | 2004-03-05 | 내열성 수산화알루미늄 및 그 제조방법 |
US10/548,780 US8138255B2 (en) | 2003-03-10 | 2004-03-05 | Heat-resistant aluminum hydroxide and method for preparation thereof |
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JP2003062679 | 2003-03-10 | ||
JP2003-062679 | 2003-03-10 |
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EP (1) | EP1604951B1 (ja) |
JP (1) | JP4614354B2 (ja) |
KR (1) | KR101085003B1 (ja) |
TW (1) | TW200502292A (ja) |
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JP2009084387A (ja) * | 2007-09-28 | 2009-04-23 | Takiron Co Ltd | 塩化ビニル系樹脂成形体 |
JP2011231257A (ja) * | 2010-04-28 | 2011-11-17 | Kyocera Chemical Corp | 感光性樹脂組成物及びそれを用いたフレキシブルプリント配線板 |
JP2012247560A (ja) * | 2011-05-26 | 2012-12-13 | Kyocera Chemical Corp | アルカリ現像型の感光性樹脂組成物、並びにこれを用いた感光性フィルム及びレジスト |
JP2013010665A (ja) * | 2011-06-29 | 2013-01-17 | Hitachi Chemical Co Ltd | 耐熱性水酸化アルミニウム粒子及びその製造方法、樹脂組成物、プリプレグ、積層板 |
JP2013035980A (ja) * | 2011-08-10 | 2013-02-21 | Toray Ind Inc | 難燃性熱可塑性ポリエステル樹脂組成物および成形品 |
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JP2013010665A (ja) * | 2011-06-29 | 2013-01-17 | Hitachi Chemical Co Ltd | 耐熱性水酸化アルミニウム粒子及びその製造方法、樹脂組成物、プリプレグ、積層板 |
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WO2015182504A1 (ja) * | 2014-05-29 | 2015-12-03 | 住友化学株式会社 | 耐熱水酸化アルミニウムの製造方法 |
WO2015182305A1 (ja) * | 2014-05-29 | 2015-12-03 | 住友化学株式会社 | 耐熱水酸化アルミニウム及びその製造方法 |
KR20170009880A (ko) | 2014-05-29 | 2017-01-25 | 스미또모 가가꾸 가부시끼가이샤 | 내열 수산화 알루미늄의 제조 방법 |
KR20170012267A (ko) | 2014-05-29 | 2017-02-02 | 스미또모 가가꾸 가부시끼가이샤 | 내열 수산화 알루미늄 및 그 제조 방법 |
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TWI657049B (zh) * | 2014-05-29 | 2019-04-21 | 日商住友化學股份有限公司 | 耐熱氫氧化鋁之製造方法 |
KR102384088B1 (ko) | 2014-05-29 | 2022-04-06 | 스미또모 가가꾸 가부시끼가이샤 | 내열 수산화 알루미늄 및 그 제조 방법 |
JP2016094334A (ja) * | 2015-11-05 | 2016-05-26 | 日立化成株式会社 | 耐熱性水酸化アルミニウム粒子及びその製造方法、樹脂組成物、プリプレグ、積層板 |
JP2017214502A (ja) * | 2016-06-01 | 2017-12-07 | 古河電気工業株式会社 | 難燃性樹脂組成物およびそれを用いた成形体及び絶縁電線・ケーブル |
Also Published As
Publication number | Publication date |
---|---|
TWI359836B (ja) | 2012-03-11 |
TW200502292A (en) | 2005-01-16 |
US20060216226A1 (en) | 2006-09-28 |
JPWO2004080897A1 (ja) | 2006-06-08 |
EP1604951A4 (en) | 2012-03-14 |
EP1604951A1 (en) | 2005-12-14 |
KR20050109520A (ko) | 2005-11-21 |
EP1604951B1 (en) | 2018-08-22 |
JP4614354B2 (ja) | 2011-01-19 |
US8138255B2 (en) | 2012-03-20 |
KR101085003B1 (ko) | 2011-11-21 |
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