JPH0489308A - Production of mixture of magnesium hydroxide and magnesium carbonate anhydride - Google Patents
Production of mixture of magnesium hydroxide and magnesium carbonate anhydrideInfo
- Publication number
- JPH0489308A JPH0489308A JP19918990A JP19918990A JPH0489308A JP H0489308 A JPH0489308 A JP H0489308A JP 19918990 A JP19918990 A JP 19918990A JP 19918990 A JP19918990 A JP 19918990A JP H0489308 A JPH0489308 A JP H0489308A
- Authority
- JP
- Japan
- Prior art keywords
- mixture
- magnesium hydroxide
- magnesium
- reaction
- magnesium carbonate
- 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
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 title claims abstract description 45
- 239000000347 magnesium hydroxide Substances 0.000 title claims abstract description 45
- 229910001862 magnesium hydroxide Inorganic materials 0.000 title claims abstract description 45
- 239000000203 mixture Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 4
- 239000001095 magnesium carbonate Substances 0.000 title abstract description 10
- 229910000021 magnesium carbonate Inorganic materials 0.000 title abstract description 10
- -1 magnesium carbonate anhydride Chemical class 0.000 title description 4
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 24
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 10
- NEKPCAYWQWRBHN-UHFFFAOYSA-L magnesium;carbonate;trihydrate Chemical compound O.O.O.[Mg+2].[O-]C([O-])=O NEKPCAYWQWRBHN-UHFFFAOYSA-L 0.000 claims description 5
- 239000002002 slurry Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003063 flame retardant Substances 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 6
- 239000012295 chemical reaction liquid Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 235000012254 magnesium hydroxide Nutrition 0.000 abstract 6
- 235000014380 magnesium carbonate Nutrition 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 22
- 229920005992 thermoplastic resin Polymers 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- 239000011777 magnesium Substances 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000006253 efflorescence Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 206010037844 rash Diseases 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- YYINWHOQKIUBNL-UHFFFAOYSA-N magnesium;trihydrate Chemical compound O.O.O.[Mg] YYINWHOQKIUBNL-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000006069 physical mixture Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004455 differential thermal analysis Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229940031958 magnesium carbonate hydroxide Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、熱可塑性樹脂の難燃剤として好適に使用し得
る水酸化マグネシウム・無水炭酸マグネシウム混合物の
麹造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for making koji of a mixture of magnesium hydroxide and anhydrous magnesium carbonate that can be suitably used as a flame retardant for thermoplastic resins.
〔従来の技術及び発明が解決しようとする課題〕水酸化
マグネシウムや炭酸マグネシウムは、熱可塑性樹脂の難
燃剤として知られている。[Prior Art and Problems to be Solved by the Invention] Magnesium hydroxide and magnesium carbonate are known as flame retardants for thermoplastic resins.
しかしながら、水酸化マグネシウムな熱可塑性樹脂に配
合した場合、熱可塑性樹脂が白華して外観の低下を招く
という問題があった。However, when blended with a thermoplastic resin such as magnesium hydroxide, there is a problem in that the thermoplastic resin efflorescences, resulting in a deterioration in appearance.
ｌた、炭酸マグネシウムをポリ塩化ビニルやポリエチレ
ンなどの熱可塑性樹脂に配合した場合、難燃化効果の発
現が不十分であるといったＩ’！１ｍｌがあった。In addition, when magnesium carbonate is blended with thermoplastic resins such as polyvinyl chloride and polyethylene, the flame retardant effect is insufficient. There was 1ml.
さらにまた、これらの水酸化マグネシウムと炭酸マグネ
シウムとを混合して熱可塑性樹脂に配合することが考え
られるが、本発明者らが確認したところによると、水酸
化マグネシウムと炭酸マグネンウムとを混合機により混
合したものを配合した熱可塑性樹脂は、例えば、射出成
型を行なった場合に成型品にフラッシュ模様が生じたり
、光沢が低下したりする上、引張強度や衝撃強度の低下
が着しく、実用に供することができなかった。Furthermore, it is conceivable to mix these magnesium hydroxide and magnesium carbonate and blend them into a thermoplastic resin, but the inventors have confirmed that magnesium hydroxide and magnesium carbonate are mixed in a mixer. For example, when thermoplastic resins containing these mixtures are injection-molded, flash patterns may appear in the molded product, the gloss may be reduced, and the tensile strength and impact strength may deteriorate, making it difficult to put into practical use. I was unable to provide it.
そこで、本発明者らは、外観や機械的強度の低下のない
熱可塑性樹脂用難燃剤を開発することを目的として鋭意
研究を重ねてきた。Therefore, the present inventors have conducted extensive research with the aim of developing a flame retardant for thermoplastic resins that does not reduce appearance or mechanical strength.
〔１ｌＩＩ！ｌを解決するための手段〕七の結果、水酸
化マグネシウムを一部炭酸化した後に水熱反応すること
によって水酸化マグネシウムと無水炭酸マグネシウムと
の混合物が得られること、得られた水酸化マグネシウム
と無水炭酸マグネシウムとの混合物は混合機による息な
る物理的な混合物と興なり、熱可塑性樹脂に配合するこ
とにより、外観や機械的強度を著しく低下させることな
く難燃効果を付与するものであることを見出し、本発明
を提案するに至った。[1lII! [Means for solving 1] As a result of 7, a mixture of magnesium hydroxide and anhydrous magnesium carbonate can be obtained by partially carbonating magnesium hydroxide and then subjecting it to a hydrothermal reaction, and the obtained magnesium hydroxide and The mixture with anhydrous magnesium carbonate is created as a physical mixture using a mixer, and by blending it into a thermoplastic resin, it imparts flame retardant effects without significantly reducing the appearance or mechanical strength. They discovered this and came to propose the present invention.
即ち、本発明は、水酸化マグネシウムを一部炭酸化して
水酸化マグネシウムと炭酸マグネシウム３水塩との混合
物を得、次いで、該混合物を水熱合成することを特徴と
する水酸化マグネシウム・無水炭酸マグネシウム混合物
の製造方法である。That is, the present invention provides magnesium hydroxide/carbonate anhydride, which is characterized in that magnesium hydroxide is partially carbonated to obtain a mixture of magnesium hydroxide and magnesium carbonate trihydrate, and then the mixture is hydrothermally synthesized. This is a method for producing a magnesium mixture.
本発明における原料である水散化マグネシウムは、通常
、スラリーの状態で用いられる。Water-dispersed magnesium, which is a raw material in the present invention, is usually used in the form of a slurry.
スラリーの濃度は、反応液量を少なくして反応装置を小
さくする一方、反応液の粘度上昇により反応の進行が妨
げられるのを防ぐために、一般にはＭｇＯとしてｌＯ〜
８０１１／Ｉｔであり、好ましくは２０〜ｓ ｏ １１
／ｌの範囲である。The concentration of the slurry is generally adjusted to 10 to 10% as MgO in order to reduce the amount of reaction liquid to make the reaction apparatus smaller and to prevent the progress of the reaction from being hindered by an increase in the viscosity of the reaction liquid.
8011/It, preferably 20 to s o 11
/l range.
水酸化マグネシウムの炭酸化反応は、公知の方法が何ら
制限なく採用されるが、一般にハ水散化マグネシウムの
スラリー中にＣＯ２ガスを吹き込むことによって行なわ
する。戻限化反応なＣ０２ガスを吹き込むことによって
行なう場合、ＣＯ□ガスの濃度は、反応効率の点から濃
い方が好ましいが、通常はｌＯ容量弧以上であれば良い
。また、ＣＯ□ガスの流量は、スラリーのａｌｌガスの
吸収能力及び攪拌効果の点から、水散化マグネシウムの
スラリー中のＭｇ０１！Ｋｇ当り、１０〜６００／／分
の範囲から採用することが好ましい。The carbonation reaction of magnesium hydroxide can be carried out by any known method without any limitation, but is generally carried out by blowing CO2 gas into a slurry of aqueous dispersion of magnesium. When the reaction is carried out by blowing CO2 gas into the back-limiting reaction, it is preferable that the concentration of CO□ gas is higher from the viewpoint of reaction efficiency, but it is usually sufficient as long as it is equal to or higher than the 1O capacity arc. In addition, the flow rate of CO□ gas is determined from the viewpoint of the absorption capacity of all gases of the slurry and the stirring effect, and the Mg01! It is preferable to adopt from a range of 10 to 600/min per kg.
炭酸化反応は、水酸化マグネシウムと炭酸マグネシウム
３水塩との混合物を得るためには、反応温度が常温〜５
０℃の範囲であることが好ましい。反応温度が５０℃を
越えた場合には、炭酸マグネシウム３水塩がさらに反応
して塩基性炭酸マグネシウムを生成し、本発明で目的と
する水酸化マグネシウムと無水炭酸マグネシウムとの混
合物が得られないことがある。In the carbonation reaction, in order to obtain a mixture of magnesium hydroxide and magnesium carbonate trihydrate, the reaction temperature must be between room temperature and 50%
Preferably, the temperature is in the range of 0°C. If the reaction temperature exceeds 50°C, magnesium carbonate trihydrate further reacts to produce basic magnesium carbonate, and the mixture of magnesium hydroxide and anhydrous magnesium carbonate that is the objective of the present invention cannot be obtained. Sometimes.
水酸化マグネシウムの炭酸化の程度は、熱可塑性樹脂の
外観と機械的強度とを損わなず、難燃効果の優れた水酸
化マグネシウム・無水炭酸マグネシウム混合物を得るた
めには、炭酸マグネシウム３水墳の水酸化マグネシウム
に対するそル比でα１〜１、好筐しくはα３〜α６の範
囲となるように選択することが好適である。In order to obtain a magnesium hydroxide/anhydrous magnesium carbonate mixture that does not impair the appearance and mechanical strength of the thermoplastic resin and has an excellent flame retardant effect, the degree of carbonation of magnesium hydroxide must be determined by It is preferable to select so that the solenoid ratio to magnesium hydroxide is in the range of α1 to 1, preferably α3 to α6.
反応液のＰＨは、炭酸化反応の程度に応じて次のように
変化する。即ち、水酸化マグネシウムのスラリーのＰＨ
４１１０ｉｉｉ度であり、これを炭酸化すると炭酸化の
程度に応じて反応液のＰＨは低下し、ＰＨは約８に到る
。さらに炭酸化を行なうと反応液のＰＨは上昇を開始し
、約９まで上昇した後、再びＰＨは低下を始める。ここ
で、水酸化マグネシウムのスラリーのＰＨが炭酸化によ
って低下を始め、ＰＨが＆５に至ったときが、縦置マグ
ネシウム３水塩の水酸化マグネシウムに対するモル比が
α５の点であり、また、炭酸化の進行に伴って反応液の
ＰＨが極小点を過ぎて上昇を開始し、極大点に至ったと
倉が、上記のモル比が１の点である。従って、水酸化マ
グネジ９ムの炭酸化反応中のＰＨを測定することによっ
て炭酸化反応の終点を容易に決定することができる。The pH of the reaction solution changes as follows depending on the degree of carbonation reaction. That is, the pH of the slurry of magnesium hydroxide
When this is carbonated, the pH of the reaction solution decreases depending on the degree of carbonation, reaching about 8. When carbonation is further carried out, the pH of the reaction solution starts to rise, and after rising to about 9, the pH starts to fall again. Here, when the pH of the slurry of magnesium hydroxide starts to decrease due to carbonation and reaches &5, the molar ratio of vertically placed magnesium trihydrate to magnesium hydroxide is α5, and As the reaction progresses, the pH of the reaction solution passes the minimum point and begins to rise, reaching the maximum point at which the molar ratio is 1. Therefore, the end point of the carbonation reaction can be easily determined by measuring the pH during the carbonation reaction of magnesium hydroxide.
このようにして、炭酸マグネシウムと水酸化マグネシウ
ムとの混合物を得ることができる。In this way, a mixture of magnesium carbonate and magnesium hydroxide can be obtained.
本発明においては、こうして得られた炭酸！グネシウム
３水塩と水酸化マグネシウムとの混合物の水熱反応が行
なわれる。水熱反応により炭酸マグネシウム３水墳は無
水炭酸マグネシウムになり、本発明の目的とする水酸化
マグネシウム・無水炭駿マグネシウム混合物を得ること
がで富る。水熱反応は、炭酸化により得られた炭酸マグ
ネシウム３水塩と水酸化マグネシウムの混合物がスラリ
ーの成層で実施すれば良い。水熱反応の条件は、１２０
〜２００℃の温度範囲で、１〜２０時間の度応時間が好
適に採用される。反応中は、十分に攪拌することが好ま
しい。In the present invention, the carbonic acid obtained in this way! A hydrothermal reaction of a mixture of magnesium trihydrate and magnesium hydroxide is carried out. Due to the hydrothermal reaction, the magnesium carbonate 3 water tomb becomes anhydrous magnesium carbonate, making it possible to obtain a mixture of magnesium hydroxide and anhydrous magnesium carbonate, which is the object of the present invention. The hydrothermal reaction may be carried out by stratifying a slurry of a mixture of magnesium carbonate trihydrate and magnesium hydroxide obtained by carbonation. The conditions for the hydrothermal reaction are 120
Temperatures ranging from 1 to 20 hours and temperature ranges from 1 to 20 hours are preferably employed. It is preferable to stir thoroughly during the reaction.
こうして本発明の目的とする水酸化マグネシウム・無水
炭酸マグネシウム混合物を得ることができる。この水酸
化マグネシウム・無水炭酸マグネシウム混合物は、Ｘ！
１回折によれば、水酸化マグネシウムと無水炭酸マグネ
シウムの夫々に基づく回折ピークが認められることから
、夫青の化合物の混合物であることがわかる。しかし、
これら夫々の化合物の混合機等による単なる物理的な混
合物とは興なり、化学反応に基づいてミクロにブレンド
されているものと考えられる。このために、本発明によ
り得られた水酸化！グネシウム・無水炭酸マグネシウム
混合物は、熱可塑性樹脂の■燃剤として好適に使用する
ことができる。In this way, a mixture of magnesium hydroxide and anhydrous magnesium carbonate, which is the object of the present invention, can be obtained. This magnesium hydroxide/anhydrous magnesium carbonate mixture is X!
According to 1st diffraction, diffraction peaks based on magnesium hydroxide and anhydrous magnesium carbonate are observed, which indicates that the product is a mixture of fluorine compounds. but,
It is thought that these compounds are not merely physically mixed by a mixer or the like, but are micro-blended based on chemical reactions. For this purpose, the hydroxide obtained according to the invention! The gnesium/anhydrous magnesium carbonate mixture can be suitably used as a combustion agent for thermoplastic resins.
本発明の方法により得られた水酸化、グネシウム・無水
炭酸マグネシウム混合物を熱可塑性樹脂に配合すること
により、白華やフラッシュ模様発生による外観を低下さ
せることなく、また、引張強度や衝撃強度を著しく低下
させることなく熱可塑性４１を脂のＩＩ燃性な崗止させ
ることができる。このような優れた効果は、水酸化マグ
ネシウムと無水炭酸マグネシウムの単なる物理的な混合
物では得られなかった効果である。By blending the hydroxide, magnesium and anhydrous magnesium carbonate mixture obtained by the method of the present invention into a thermoplastic resin, the appearance is not deteriorated due to efflorescence or flash patterns, and the tensile strength and impact strength are significantly increased. Thermoplastic 41 can be made to be flammable to fat without degrading it. Such excellent effects could not be obtained with a mere physical mixture of magnesium hydroxide and anhydrous magnesium carbonate.
以下に、本発明をさらに具体的に説明するために実施例
および比較例を示すが、本発明はこれらの実施例に限定
されるものではない。Examples and comparative examples are shown below to further specifically explain the present invention, but the present invention is not limited to these examples.
実施例１
海水法で得られた水酸化マグネシウムスラリー液（Ｍｇ
Ｏとして５０ｇ／／）１０／に９５容量憾のＣＯ２ガス
を吹込み、常温で一部炭酸化した。ＣＯ２ガスは水酸化
マグネシウムスラリー液のＭｇ０１ ｋｇ１当り６０１
／分で反応液のＰＨが＆６になるまで吹き込んだ。この
スラリー液を１７０℃で４時間水熱反応を行なった。室
温まで冷却後、生成物を取り出し、減圧濾過して固形分
を分離し、水洗後、１１０℃で１０時間乾燥した。この
乾燥物を粉砕して粉末とした。得られた生成物は、Ｘ線
回折の結果、水酸化マグネシウムと無水炭酸！グネシウ
ムの混合物であると同定された。化学分析の結果、生成
物の組成はＭｇ Ｃｏ 、・２Ｍｇ（ＯＨ） 、である
ことが示された。また、ＢＥＴ法比法面表面積 ６１１
１’／ｊｉであり、走査型電子顕微鏡写真よりこの粒子
は不定形であることがわかった。示差熱分析の結果から
求めた結晶水の脱離開始温度は３６０℃であった。Example 1 Magnesium hydroxide slurry liquid (Mg
95 volumes of CO2 gas was blown into the flask (50 g as O) and partially carbonated at room temperature. CO2 gas is 601 per kg of Mg01 of magnesium hydroxide slurry liquid.
/min until the pH of the reaction solution reached &6. This slurry liquid was subjected to a hydrothermal reaction at 170°C for 4 hours. After cooling to room temperature, the product was taken out, filtered under reduced pressure to separate solid content, washed with water, and dried at 110° C. for 10 hours. This dried product was ground into powder. As a result of X-ray diffraction, the obtained product was magnesium hydroxide and carbonic acid anhydride! It was identified as a mixture of gnesium. Chemical analysis showed the composition of the product to be Mg Co , .2Mg(OH). In addition, BET ratio slope surface area 611
1'/ji, and scanning electron micrographs revealed that the particles were amorphous. The desorption onset temperature of crystal water determined from the results of differential thermal analysis was 360°C.
実施例２
市販の水酸化マグネシウムを水に懸濁させ、全量を１０
ｊとしてＭｇＯ濃度をａｏｉ／１に調整した。このスラ
リー液を３０℃で炭酸化した。９５容量襲のＣＯ２ガス
を水酸化！グネシウムのスラリー液のＭｇ０１ ｋｇ当
り５０１７分で吹き込み、ＰＨが９．２になるまで反応
を続けた。この度応液を１４０℃で８時間水熱反応を行
なった。その後は実施例１と同様に行なって白色粉末を
得た。生成物の組成はＭｇＣ０，・３Ｍｇ （ＯＨ）ｚ
であり、走査型電子顕微鏡写真よりこの粒子は不定形で
あることがわかった。ＢＥＴ法比法面表面積６１１１’
／ｇであった。また、結晶水の脱離温度は３６０℃であ
ったー
実施例３および比較例
実施例１及び２で得た水酸化マグネシウム・無水炭酸マ
グネシウム混合物囚及び（６）、市販の水酸化マグネシ
ウムΩ、市販の無水炭酸マグネシウム０、さらに０と０
をモル比２：ｌで混合した粉体（ト）の各Ａ−１０ｋｌ
をステアリン酸ソーダ水溶液に添加し、８０℃で３０分
間攪拌したのち減圧濾過し、水洗したのち１２０℃で５
時間乾燥してステアリン酸ソーダ処理物を得た。この処
理物を粉砕して９０メツシュ全通とした。これらの試料
は、いずれもステアリン酸に換算して約６重量弧のステ
アリン酸ソーダを吸着していた。Example 2 Commercially available magnesium hydroxide was suspended in water, and the total amount was 10
The MgO concentration was adjusted to aoi/1 as j. This slurry liquid was carbonated at 30°C. Hydrogenates 95 volumes of CO2 gas! The gnesium slurry liquid was blown in for 5017 minutes per kg of Mg, and the reaction was continued until the pH reached 9.2. This time, the reaction solution was subjected to a hydrothermal reaction at 140°C for 8 hours. Thereafter, the same procedure as in Example 1 was carried out to obtain a white powder. The composition of the product is MgC0,・3Mg (OH)z
Scanning electron micrographs revealed that the particles were irregular in shape. BET ratio normal surface area 6111'
/g. In addition, the desorption temperature of crystal water was 360°C - the magnesium hydroxide/anhydrous magnesium carbonate mixture obtained in Example 3 and Comparative Examples 1 and 2 and (6), commercially available magnesium hydroxide Ω, Commercially available anhydrous magnesium carbonate 0, further 0 and 0
Each A-10kl of powder (g) mixed at a molar ratio of 2:l
was added to an aqueous solution of sodium stearate, stirred at 80°C for 30 minutes, filtered under reduced pressure, washed with water, and stirred at 120°C for 5 minutes.
After drying for hours, a sodium stearate treated product was obtained. This treated material was pulverized to give a total of 90 meshes. All of these samples adsorbed approximately 6 weight arcs of sodium stearate in terms of stearic acid.
ポリプロピレン８ゆを単独で、また、上記試料の夫に１
０に９と混合し、押出様を用いて押出温度的２３０℃で
ペレット化した。得られたペレットを用いて２４０℃で
射出成型して厚さ、約２インチの射出成型板を製造した
。8 ml of polypropylene alone and 1 ml of the above sample
0 and 9 were mixed and pelletized using an extruder at an extrusion temperature of 230°C. The obtained pellets were injection molded at 240° C. to produce an injection molded plate with a thickness of approximately 2 inches.
この射出成型板の外観、衝撃強度、引張強度を測定し、
その結果を第１表に示した。We measured the appearance, impact strength, and tensile strength of this injection molded plate.
The results are shown in Table 1.
尚、第１表中の各物性は次の方法に従って測定した。In addition, each physical property in Table 1 was measured according to the following method.
ｌ） メルトフローインデックス ＪＩＳ Ｋ
６７５８にｊｌＥ拠２） アイゾツト衝撃強度
ＪＩＳ Ｋ ７１１０に準拠３）引張強度
ＪＩＳ Ｋ ７１１３に準拠４）白華性
サンシャインワエザーメーターにより紫外線を１００時
間照射後の外観を次の基準で評価した。l) Melt flow index JIS K
Based on 6758 2) Izotsu impact strength
Based on JIS K 7110 3) Tensile strength
Based on JIS K 7113 4) Appearance after irradiation with ultraviolet rays for 100 hours using an efflorescence sunshine weather meter was evaluated according to the following criteria.
＠： 変化なし ○： 一部白華 ×： 全体的に白華 ５）ｍｌ燃注 ＵＬ規格９４ＶＥ 燃性規格）に準拠 （米国プラスチック離@: no change ○: Some efflorescence ×: Overall efflorescence 5) ml fuel injection UL standard 94VE Compliant with flammability standards) (US plastic withdrawal)
Claims (1)
ネシウムと炭酸マグネシウム３水塩との混合物を得、次
いで、該混合物を水熱反応することを特徴とする水酸化
マグネシウム・無水炭酸マグネシウム混合物の製造方法
。(1) A magnesium hydroxide/anhydrous magnesium carbonate mixture characterized by partially carbonating magnesium hydroxide to obtain a mixture of magnesium hydroxide and magnesium carbonate trihydrate, and then subjecting the mixture to a hydrothermal reaction. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19918990A JPH0489308A (en) | 1990-07-30 | 1990-07-30 | Production of mixture of magnesium hydroxide and magnesium carbonate anhydride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19918990A JPH0489308A (en) | 1990-07-30 | 1990-07-30 | Production of mixture of magnesium hydroxide and magnesium carbonate anhydride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0489308A true JPH0489308A (en) | 1992-03-23 |
Family
ID=16403623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19918990A Pending JPH0489308A (en) | 1990-07-30 | 1990-07-30 | Production of mixture of magnesium hydroxide and magnesium carbonate anhydride |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0489308A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5872169A (en) * | 1994-12-02 | 1999-02-16 | Flamemag International Gie | Magnesium process |
| JP2008137845A (en) * | 2006-12-01 | 2008-06-19 | Tateho Chem Ind Co Ltd | Method of producing magnesium oxide |
| CN104743585A (en) * | 2015-03-04 | 2015-07-01 | 上海应用技术学院 | Method for preparing flame retardant grade magnesium hydroxide |
-
1990
- 1990-07-30 JP JP19918990A patent/JPH0489308A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5872169A (en) * | 1994-12-02 | 1999-02-16 | Flamemag International Gie | Magnesium process |
| JP2008137845A (en) * | 2006-12-01 | 2008-06-19 | Tateho Chem Ind Co Ltd | Method of producing magnesium oxide |
| CN104743585A (en) * | 2015-03-04 | 2015-07-01 | 上海应用技术学院 | Method for preparing flame retardant grade magnesium hydroxide |
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