JPH05286713A - Production of highly dispersible magnesium oxide and highly dispersible magnesium oxide - Google Patents
Production of highly dispersible magnesium oxide and highly dispersible magnesium oxideInfo
- Publication number
- JPH05286713A JPH05286713A JP9086192A JP9086192A JPH05286713A JP H05286713 A JPH05286713 A JP H05286713A JP 9086192 A JP9086192 A JP 9086192A JP 9086192 A JP9086192 A JP 9086192A JP H05286713 A JPH05286713 A JP H05286713A
- Authority
- JP
- Japan
- Prior art keywords
- magnesium oxide
- highly dispersible
- dispersibility
- dispersible magnesium
- screen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明の高分散性酸化マグネシウ
ムの製造方法及び高分散性酸化マグネシウムに係り、特
に、コーディエライト等のセラミックス用原料、クロロ
プレン、ハイパロン等のハロゲン化ゴムの受酸剤、ＦＲ
Ｐの増粘剤、珪素鋼板用焼鈍分離剤等に利用される高分
散性酸化マグネシウムの製造方法及び高分散性酸化マグ
ネシウムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing highly dispersible magnesium oxide and highly dispersible magnesium oxide, and particularly to a raw material for ceramics such as cordierite and an acid acceptor for halogenated rubber such as chloroprene and hypalon. , FR
The present invention relates to a method for producing highly dispersible magnesium oxide and a highly dispersible magnesium oxide used as a thickener for P, an annealing separator for silicon steel sheets, and the like.
【０００２】[0002]
【従来の技術】酸化マグネシウムは、コーディエライト
等の各種セラミックス用原料、その他各種材料の添加剤
等として、工業的に広く利用されている。2. Description of the Related Art Magnesium oxide is industrially widely used as a raw material for various ceramics such as cordierite and as an additive for various other materials.
【０００３】酸化マグネシウムを各種用途に使用する場
合、当該材料中に分散させる必要があるが、一般に提供
される酸化マグネシウムは分散性が非常に悪く、そのま
ま材料中に投入した場合には、比較的大きな固まり、所
謂“ダマ”が生成し易いという欠点がある。When magnesium oxide is used for various purposes, it is necessary to disperse it in the material. However, generally provided magnesium oxide has very poor dispersibility, and when it is directly added to the material, it is relatively poor. There is a drawback that large lumps and so-called "damages" are easily generated.
【０００４】従来、酸化マグネシウムの分散性を改良す
るための方法としては、酸化マグネシウムを水蒸気で表
面処理して、酸化マグネシウム粒子の最表面層に水和層
を形成する方法（特開昭６２−１５６２２７号）、或い
は、１４００℃以上で焼成した酸化マグネシウムを無機
酸基又は有機酸基が共存する水溶液中で水和処理し、再
度焼成する方法（特公平１−３７３３１号）が提供され
る。Conventionally, as a method for improving the dispersibility of magnesium oxide, a method of surface-treating magnesium oxide with steam to form a hydrated layer on the outermost surface layer of magnesium oxide particles (Japanese Patent Laid-Open No. 62-62). No. 156227), or magnesium oxide calcined at 1400 ° C. or higher is hydrated in an aqueous solution in which an inorganic acid group or an organic acid group coexists, and calcined again (Japanese Patent Publication No. 1-37331).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記従
来法のうち、特開昭６２−１５６２２７号に開示される
方法では、次のような欠点がある。即ち、酸化マグネシ
ウム粒子の最表面層に水和層形成処理を行なう場合、水
蒸気を使用して酸化マグネシウムを処理するため、処理
中に酸化マグネシウムが空気中に含有される炭酸ガスと
反応して塩基性炭酸マグネシウムのブリッジを生成し易
く、短期間の間に酸化マグネシウムの２次粒子が生成
し、経時的にその数が増えることから分散性が次第に低
下していく傾向がある。However, among the above-mentioned conventional methods, the method disclosed in Japanese Patent Laid-Open No. 62-156227 has the following drawbacks. That is, when the hydrated layer forming treatment is performed on the outermost surface layer of the magnesium oxide particles, since the magnesium oxide is treated by using steam, the magnesium oxide reacts with carbon dioxide gas contained in the air during the treatment to form a base. A bridging of soluble magnesium carbonate is easily generated, secondary particles of magnesium oxide are generated in a short period of time, and the number thereof increases over time, so that the dispersibility tends to gradually decrease.
【０００６】一方、特公平１−３７３３１号に開示され
る方法では、工程が複雑な上に、高温焼成した酸化マグ
ネシウムを水和するため、水和処理に時間がかかり、大
量生産性に劣り、コスト高になるという問題がある。On the other hand, in the method disclosed in Japanese Patent Publication No. 1-37331, since the process is complicated and the magnesium oxide fired at a high temperature is hydrated, the hydration treatment takes a long time, resulting in poor mass productivity. There is a problem of high cost.
【０００７】また、従来、酸化マグネシウムの解砕に
は、ピンミルが多く使用されるが、ピンミルによる解砕
では、酸化マグネシウムの２次凝集粒子が充分に解砕さ
れない。このため、解砕処理後の酸化マグネシウムを水
スラリーとして使用した場合、水分散性が悪いことか
ら、スラリー中の異物除去等の工程においてスクリーン
の目づまりを生じ易いという欠点があった。Conventionally, a pin mill is often used for crushing magnesium oxide, but secondary crushing particles of magnesium oxide are not sufficiently crushed by crushing with a pin mill. For this reason, when magnesium oxide after crushing is used as a water slurry, there is a drawback that the screen is likely to be clogged in a step of removing foreign matters in the slurry because of poor water dispersibility.
【０００８】本発明は上記従来の問題点を解決し、経時
的な分散性の劣化等のない高分散性酸化マグネシウムを
複雑な工程を経ることなく、高い生産性にて製造するこ
とができる高分散性酸化マグネシウムの製造方法及び高
分散性酸化マグネシウムを提供することを目的とする。The present invention solves the above-mentioned problems of the prior art and makes it possible to produce highly dispersible magnesium oxide having no deterioration in dispersibility with time and with high productivity without complicated steps. An object of the present invention is to provide a method for producing dispersible magnesium oxide and a highly dispersible magnesium oxide.
【０００９】[0009]
【課題を解決するための手段】請求項１の高分散性酸化
マグネシウムの製造方法は、ＢＥＴ比表面積値が５〜１
５０ｍ2 ／ｇの酸化マグネシウムを、乾式状態で目開き
７０〜２００μｍのスクリーンを強制通過させて解砕す
ることを特徴とする。The method for producing highly dispersible magnesium oxide according to claim 1 has a BET specific surface area value of 5 to 1
It is characterized in that 50 m 2 / g of magnesium oxide is crushed in a dry state by forcibly passing it through a screen having an opening of 70 to 200 μm.
【００１０】請求項２の高分散性酸化マグネシウムは、
請求項１の方法で得られた酸化マグネシウムであって、
２次粒子の累積５０％粒子径が２μｍ以下であることを
特徴とする。The highly dispersible magnesium oxide according to claim 2 is
A magnesium oxide obtained by the method of claim 1, wherein
The 50% cumulative particle size of the secondary particles is 2 μm or less.
【００１１】即ち、本発明者らは、上記従来の問題点を
解決し、高分散性酸化マグネシウムを工業的有利に製造
すべく鋭意研究を重ねた結果、酸化マグネシウム粉末の
解砕方法を改良することにより、分散性の優れた酸化マ
グネシウムを容易かつ効率的に製造し得ることを見出
し、この知見に基いて本発明を完成させた。That is, the inventors of the present invention have made intensive studies to solve the above-mentioned conventional problems and to industrially produce highly dispersible magnesium oxide, and as a result, improve the method for crushing magnesium oxide powder. As a result, it was found that magnesium oxide having excellent dispersibility can be easily and efficiently produced, and the present invention was completed based on this finding.
【００１２】以下に本発明を詳細に説明する。The present invention will be described in detail below.
【００１３】本発明において、解砕処理に供する酸化マ
グネシウムは、例えば、水酸化マグネシウム、塩基性炭
酸マグネシウム、塩化マグネシウム、硝酸マグネシウ
ム、シュウ酸マグネシウム等の１種又は２種以上のマグ
ネシウム化合物を１１００℃以下で焼成して得られるＢ
ＥＴ比表面積値が５〜２００ｍ2 ／ｇの酸化マグネシウ
ムである。この酸化マグネシウムのＢＥＴ比表面積値が
５ｍ2 ／ｇ未満のものでは、酸化マグネシウムの焼結が
進み、解砕が困難になり、製品への不純物混入、或いは
分級機、解砕機のスクリーンなどの破損を生じ易い。Ｂ
ＥＴ比表面積が２００ｍ2 ／ｇを超える場合には、酸化
マグネシウムが著しく活性で高度に静電気を帯びている
ため、分級機、解砕機のスクリーンなどの目詰りを生じ
易く、生産性を低下させる。従って、酸化マグネシウム
のＢＥＴ比表面積値は５〜２００ｍ2 ／ｇ、好ましくは
１５〜１５０ｍ2 ／ｇであることが必要である。In the present invention, the magnesium oxide to be subjected to the crushing treatment is, for example, 1100 ° C. of one or more magnesium compounds such as magnesium hydroxide, basic magnesium carbonate, magnesium chloride, magnesium nitrate and magnesium oxalate. B obtained by firing below
It is magnesium oxide having an ET specific surface area value of 5 to 200 m 2 / g. If the BET specific surface area value of this magnesium oxide is less than 5 m 2 / g, the magnesium oxide will be sintered and the crushing will be difficult, and impurities will be mixed into the product, or the screen of the classifier or the crusher will be damaged. Is likely to occur. B
When the ET specific surface area exceeds 200 m 2 / g, magnesium oxide is remarkably active and highly charged with static electricity, so that clogging of a screen of a classifier or a crusher is likely to occur and productivity is lowered. Therefore, it is necessary that the BET specific surface area value of magnesium oxide is 5 to 200 m 2 / g, preferably 15 to 150 m 2 / g.
【００１４】このような酸化マグネシウムの解砕処理
は、スクリーン付解砕機、ふるい等の分級機等を用いて
行なうことができる。ここで解砕に用いる分級機や解砕
機のスクリーンの目開きが、７０μｍ未満の場合には、
著しく目詰りを生じ易くなり、生産性が低下する。目開
きが、２００μｍを超えると、酸化マグネシウムの解砕
が充分に行なわれず、解砕後の酸化マグネシウムに大き
な２次凝集粒子が多く存在するようになり、このような
酸化マグネシウムをスラリーにした場合、水中での分散
が充分に行なえないなどの不具合がある。従って、解砕
に用いるスクリーンの目開きは７０〜２００μｍ、好ま
しくは１００〜１８０μｍであることが必要である。Such crushing treatment of magnesium oxide can be carried out by using a crusher with a screen, a classifier such as a sieve and the like. If the screen size of the classifier or crusher used for crushing is less than 70 μm,
Clogging is apt to occur and productivity is reduced. When the opening is more than 200 μm, the magnesium oxide is not sufficiently crushed, and large secondary agglomerated particles are present in the crushed magnesium oxide. When such a magnesium oxide is slurried However, there is a problem such as insufficient dispersion in water. Therefore, it is necessary that the screen used for disintegration has an opening of 70 to 200 μm, preferably 100 to 180 μm.
【００１５】このようにして得られる本発明の高分散性
酸化マグネシウムの２次粒子の累積５０％粒子径が２μ
ｍを超えると、大きな２次凝集粒子の存在割合が多過ぎ
て、スラリーとした場合、良好な分散性が得られない。
従って、酸化マグネシウムの２次粒子の累積５０％粒子
径は２μｍ以下となるようにする。The cumulative 50% particle size of the secondary particles of the highly dispersible magnesium oxide of the present invention thus obtained is 2 μm.
If it exceeds m, the proportion of large secondary agglomerated particles present is too large, and good dispersibility cannot be obtained when it is made into a slurry.
Therefore, the cumulative 50% particle diameter of the secondary particles of magnesium oxide is set to 2 μm or less.
【００１６】[0016]
【作用】本発明の方法により、酸化マグネシウムの分散
性が向上し、かつ、その分散性が経時劣化し易いことの
理由の詳細は明らかではないが、従来の方法で解砕した
酸化マグネシウムを液中に投入した場合、比較的大きな
凝集粒子となり易く、分散性が劣るのに対し、本発明の
方法により解砕処理して得られた酸化マグネシウムは、
その解砕処理に用いるスクリーンの目開きに応じた大き
さの酸化マグネシウム粒子が得られ、この酸化マグネシ
ウム粒子が液中で分散された単一粒子のように振舞うた
めに、液中に容易に分散するためと考えられる。Although the details of the reason why the dispersibility of magnesium oxide is improved and the dispersibility is easily deteriorated with time by the method of the present invention are not clear, the magnesium oxide crushed by the conventional method is liquified. When added to the inside, it tends to be relatively large agglomerated particles and the dispersibility is poor, whereas the magnesium oxide obtained by the crushing treatment by the method of the present invention is
Magnesium oxide particles with a size corresponding to the opening of the screen used for the crushing process are obtained.Because the magnesium oxide particles behave like single particles dispersed in the liquid, they are easily dispersed in the liquid. It is thought to be to do.
【００１７】[0017]
【実施例】以下に実施例及び比較例を挙げて本発明をよ
り具体的に説明するが、本発明はその要旨を超えない限
り、以下の実施例に限定されるものではない。EXAMPLES The present invention will be described in more detail below with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples unless it exceeds the gist.
【００１８】実施例１ 水酸化マグネシウムを空気雰囲気中で加熱分解すること
により得られたＢＥＴ比表面積１５ｍ2 ／ｇの酸化マグ
ネシウムを、目開き１５０μｍのふるいを強制通過させ
て解砕を行なった。得られた酸化マグネシウムの２次粒
子の累積５０％粒子径をセイシン企業（株）製「ＳＫ−
ＬＡＺＥＲ Ｐｒｏ７０００Ｓ」を使用して測定した結
果、１．６μｍであった。Example 1 Magnesium oxide having a BET specific surface area of 15 m 2 / g obtained by thermally decomposing magnesium hydroxide in an air atmosphere was crushed by forcibly passing it through a sieve having an opening of 150 μm. The cumulative 50% particle size of the obtained secondary particles of magnesium oxide was determined by "SK-" manufactured by Seishin Enterprise Co., Ltd.
It was 1.6 μm as a result of measurement using “LAZER Pro 7000S”.
【００１９】この酸化マグネシウム１４０ｇを１０℃の
脱イオン水１リットルに投入し、ラボスタラー（ヤマト
科学製「ＬＳ−１８」）を使用して１５００ｒｐｍで３
分間攪拌して水中分散を行なった。この酸化マグネシウ
ム−水スラリーを約４リットル／ｍｉｎの流速で７５ｍ
ｍ径、目開き７４μｍのふるい上に流下し、スラリーの
ふるい通過率を測定した。その結果、ふるい上には、分
散性の悪い酸化マグネシウムの粗粒分が残ることはな
く、スラリーのふるい通過率は１００％であり、分散性
が非常に良いことが確認された。別に、前記１５０μｍ
スクリーンを強制的に通過させた酸化マグネシウムを
０．２ｍｍ厚のビニール袋に密封し、湿度７０％、温度
２０℃の高温高湿乾燥機に保管して、１５日後、３０日
後、６０日後、９０日後に各々上記方法と同様の操作で
ふるい通過率を測定したところ、いずれも１００％であ
り、分散性の経時劣化がないことが確認された。140 g of this magnesium oxide was added to 1 liter of deionized water at 10 ° C., and a laboratory stirrer (“LS-18” manufactured by Yamato Scientific Co., Ltd.) was used to perform 3 at 1500 rpm.
Dispersion in water was performed by stirring for 1 minute. This magnesium oxide-water slurry is 75m at a flow rate of about 4 liters / min.
It was flown down onto a sieve having an m diameter and an opening of 74 μm, and the sieve passage ratio of the slurry was measured. As a result, it was confirmed that no coarse particles of magnesium oxide having poor dispersibility remained on the sieve and the slurry passage rate was 100%, indicating that the dispersibility was very good. Separately, the above 150 μm
Magnesium oxide that forcedly passed through the screen was sealed in a 0.2 mm thick vinyl bag and stored in a high temperature and high humidity dryer at a humidity of 70% and a temperature of 20 ° C. for 15 days, 30 days, 60 days, and 90 days. After passing each day, the sieving rate was measured by the same operation as the above method. As a result, it was 100% in all cases, and it was confirmed that the dispersibility did not deteriorate with time.
【００２０】実施例２ 水酸化マグネシウムを空気雰囲気中で加熱分解して得ら
れたＢＥＴ比表面積４０ｍ2 ／ｇの酸化マグネシウム
を、目開き１０５μｍのふるいを強制通過させて解砕を
行なった。得られた酸化マグネシウムの２次粒子の累積
５０％粒子径を実施例１と同様に測定した結果、１．２
μｍであった。また、実施例１と同様の操作でふるい通
過率を測定した結果スラリーのふるい通過率は、解砕当
日のものも、一定期間保管したものもいずれも１００％
であった。Example 2 Magnesium oxide having a BET specific surface area of 40 m 2 / g obtained by thermally decomposing magnesium hydroxide in an air atmosphere was comminuted by forcibly passing it through a sieve having an opening of 105 μm. The cumulative 50% particle diameter of the obtained secondary particles of magnesium oxide was measured in the same manner as in Example 1, and the result was 1.2.
was μm. In addition, as a result of sieving rate measured by the same operation as in Example 1, the sieving rate of the slurry was 100% both on the day of crushing and on storage for a certain period.
Met.
【００２１】比較例１ 水酸化マグネシウムを空気雰囲気中で加熱分解して得ら
れたＢＥＴ比表面積１５ｍ2 ／ｇの酸化マグネシウム
を、目開き２５０μｍのふるいを強制通過させて解砕を
行なった。得られた酸化マグネシウムの２次粒子の累積
５０％粒子径を実施例１と同様にして測定した結果、
２．４μｍであった。また、実施例１と同様の操作でふ
るい通過率を測定した結果、解砕当日で９８％、１５日
保管後で９２％、３０日保管後で２１％、６０日保管後
で５％、９０日保管後で３％となり、スラリーのふるい
通過率が経時的に低下した。また、ふるい上には、分散
性の悪い酸化マグネシウムの粗粒分が多量に残ってい
た。Comparative Example 1 Magnesium oxide having a BET specific surface area of 15 m 2 / g obtained by thermally decomposing magnesium hydroxide in an air atmosphere was forcedly passed through a sieve having a mesh of 250 μm to disintegrate it. The cumulative 50% particle diameter of the obtained secondary particles of magnesium oxide was measured in the same manner as in Example 1, and
It was 2.4 μm. In addition, as a result of measuring the sieve passing rate by the same operation as in Example 1, 98% on the day of crushing, 92% after 15 days storage, 21% after 30 days storage, 5% after 60 days storage, 90% It became 3% after storage for a day, and the sieve passage rate of the slurry decreased with time. Further, a large amount of coarse particles of magnesium oxide having poor dispersibility remained on the sieve.
【００２２】比較例２ 水酸化マグネシウムを空気雰囲気中で加熱分解して得ら
れたＢＥＴ比表面積１５ｍ2 ／ｇの酸化マグネシウムを
ピンミル（パウレック（株）「コントラプレックス６３
Ｃ」）で解砕した。得られた酸化マグネシウムの２次粒
子の累積５０％粒子径を実施例１と同様にして測定した
結果、１．５μｍであった。また、実施例１と同様の操
作でふるい通過率を測定した結果、解砕当日で８０％、
１５日保管後で４８％、３０日保管後で９％、６０日保
管後で３％、９０日保管後で２％までふるい通過率が経
時的に低下した。また、ふるい上には、分散性の悪い酸
化マグネシウムの粗粒分が多量に残っていた。Comparative Example 2 Magnesium oxide having a BET specific surface area of 15 m 2 / g, which was obtained by thermally decomposing magnesium hydroxide in an air atmosphere, was mixed with a pin mill (Paurec Co., Ltd. “Contraplex 63”).
C "). The 50% cumulative particle diameter of the obtained secondary particles of magnesium oxide was measured in the same manner as in Example 1 and the result was 1.5 μm. In addition, as a result of measuring the sieve passage rate in the same manner as in Example 1, 80% on the day of crushing,
The sieve passage rate decreased with time to 48% after 15 days storage, 9% after 30 days storage, 3% after 60 days storage, and 2% after 90 days storage. Further, a large amount of coarse particles of magnesium oxide having poor dispersibility remained on the sieve.
【００２３】以上の結果を表１にまとめて記す。表１よ
り、本発明によれば分散性が著しく良好な酸化マグネシ
ウムが提供され、しかも、この高分散性酸化マグネシウ
ムの分散性は経時的に劣化することもなく、長期間良好
に維持されることが明らかである。The above results are summarized in Table 1. From Table 1, according to the present invention, magnesium oxide having remarkably good dispersibility is provided, and further, the dispersibility of this high-dispersion magnesium oxide is not deteriorated with time and is maintained well for a long time. Is clear.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【発明の効果】以上詳述した通り、本発明の高分散性酸
化マグネシウムの製造方法及び高分散性酸化マグネシウ
ムによれば、分散性が著しく良好で、しかも、その優れ
た分散性を長期間維持し得る高分散性酸化マグネシウム
を、複雑な工程を経ることなく、容易かつ効率的に、高
い生産性にて、しかも安価に製造することが可能とされ
る。As described in detail above, according to the method for producing highly dispersible magnesium oxide and the highly dispersible magnesium oxide of the present invention, the dispersibility is remarkably good, and the excellent dispersibility is maintained for a long period of time. It is possible to produce a highly dispersible magnesium oxide that can be produced easily, efficiently, with high productivity, and at low cost, without going through complicated steps.
Claims (2)
の酸化マグネシウムを、乾式状態で目開き７０〜２００
μｍのスクリーンを強制通過させて解砕することを特徴
とする高分散性酸化マグネシウムの製造方法。1. A BET specific surface area value of 5 to 150 m 2 / g
Of magnesium oxide of 70-200 in the dry state
A method for producing highly dispersible magnesium oxide, which comprises crushing by forcibly passing through a μm screen.
ウムであって、２次粒子の累積５０％粒子径が２μｍ以
下であることを特徴とする高分散性酸化マグネシウム。2. A highly dispersible magnesium oxide obtained by the method according to claim 1, wherein the secondary particles have a cumulative 50% particle diameter of 2 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9086192A JPH05286713A (en) | 1992-04-10 | 1992-04-10 | Production of highly dispersible magnesium oxide and highly dispersible magnesium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9086192A JPH05286713A (en) | 1992-04-10 | 1992-04-10 | Production of highly dispersible magnesium oxide and highly dispersible magnesium oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05286713A true JPH05286713A (en) | 1993-11-02 |
Family
ID=14010342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9086192A Pending JPH05286713A (en) | 1992-04-10 | 1992-04-10 | Production of highly dispersible magnesium oxide and highly dispersible magnesium oxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05286713A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007091525A (en) * | 2005-09-28 | 2007-04-12 | Nippon Chem Ind Co Ltd | Magnesium oxide powder, precursor for magnesium oxide molded body, method for producing them, magnesium oxide molded body, and magnesium oxide sintered pellet |
| WO2014155764A1 (en) * | 2013-03-25 | 2014-10-02 | 神島化学工業株式会社 | Magnesium oxide particles, resin composition, rubber composition, and molded article |
| US9061919B2 (en) | 2009-10-02 | 2015-06-23 | Tateho Chemical Industries Co., Ltd. | Magnesium oxide powder having excellent dispersibility and method for producing the same |
-
1992
- 1992-04-10 JP JP9086192A patent/JPH05286713A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007091525A (en) * | 2005-09-28 | 2007-04-12 | Nippon Chem Ind Co Ltd | Magnesium oxide powder, precursor for magnesium oxide molded body, method for producing them, magnesium oxide molded body, and magnesium oxide sintered pellet |
| US9061919B2 (en) | 2009-10-02 | 2015-06-23 | Tateho Chemical Industries Co., Ltd. | Magnesium oxide powder having excellent dispersibility and method for producing the same |
| WO2014155764A1 (en) * | 2013-03-25 | 2014-10-02 | 神島化学工業株式会社 | Magnesium oxide particles, resin composition, rubber composition, and molded article |
| RU2611510C2 (en) * | 2013-03-25 | 2017-02-27 | Коносима Кемикал Ко., Лтд. | Magnesium oxide particles, resin composition, rubber composition, and moulded article |
| US9834659B2 (en) | 2013-03-25 | 2017-12-05 | Konoshima Chemical Co., Ltd. | Magnesium oxide particles, resin composition, rubber composition, and shaped body |
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