JPH0436092B2 - - Google Patents
Info
- Publication number
- JPH0436092B2 JPH0436092B2 JP9624885A JP9624885A JPH0436092B2 JP H0436092 B2 JPH0436092 B2 JP H0436092B2 JP 9624885 A JP9624885 A JP 9624885A JP 9624885 A JP9624885 A JP 9624885A JP H0436092 B2 JPH0436092 B2 JP H0436092B2
- Authority
- JP
- Japan
- Prior art keywords
- magnesium
- mol
- magnesium oxysulfate
- oxysulfate
- reaction
- 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.)
- Expired
Links
- 239000011777 magnesium Substances 0.000 claims description 31
- 229910052749 magnesium Inorganic materials 0.000 claims description 31
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 30
- CENHPXAQKISCGD-UHFFFAOYSA-N trioxathietane 4,4-dioxide Chemical compound O=S1(=O)OOO1 CENHPXAQKISCGD-UHFFFAOYSA-N 0.000 claims description 29
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 26
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 13
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 13
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 11
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 9
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- 230000005484 gravity Effects 0.000 description 7
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 7
- 239000000347 magnesium hydroxide Substances 0.000 description 7
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 229910052936 alkali metal sulfate Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000012452 mother liquor Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- -1 magnesium oxysulfate Chemical class 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
［産業上の利用分野］
本発明は針状結晶を束ねた扇状に結晶を成長さ
せたマグネシウムオキシサルフエート（または塩
基性硫酸マグネシウム）、およびその製造方法に
関する。
この扇状マグネシウムオキシサルフエートは樹
脂用添加剤、充填剤あるいはろ過材料等の用途に
利用できる。
［従来の技術］
従来、針状、または繊維状マグネシウムオキシ
サルフエートが水熱合成条件下で製造され、樹脂
用充填剤、強化剤として使用したり、あるいはろ
過材料、ろ過助剤として利用されている。このマ
グネシウムオキシサルフエートは冷水および熱水
に不溶で、すぐれた吸油性と適度な吸湿性を有
し、他の針状、または繊維状の鉱物に比較して高
い性能を有している。
また、マグネシウムオキシサルフエートの製造
方法としては炭酸マグネシウムの複分解、硫酸マ
グネシウムと水酸化マグネシウム、または酸化マ
グネシウムとの水熱反応が知られており、これら
の方法で得られるマグネシウムオキシサルフエー
トは針状、繊維状、または塊状のものであつた。
参考文献
(1) 英国特許第3320077号明細書
(2) ウオルターレビー、コンプテス レンダス
（Walter−Levy，Comptes Rendus）202
1857（1936）
(3) 特開昭56−149318号公報
(4) 特開昭59−86654号公報
(5) 特開昭59−96153号公報
［発明が解決しようとする問題点］
しかし、針状、または繊維状のマグネシウムオ
キシサルフエートは見掛け比重が非常に小さく
（0.05〜0.1）、嵩高いため、他の材料との混合、
分散性に問題があつた。
［問題点を解決するための手段］
本発明は繊維状マグネシウムオキシサルフエー
トの機能を低下させずに見掛け比重を大きくして
取り扱いを容易にし、さらに他の材料との混合、
分散性を改良するための鋭意研究を行つた結果、
繊維状マグネシウムオキシサルフエートと同等以
上の機能を有し、見掛け比重が0.2以上で、混合、
均一分散性が極めて良好な扇状結晶のマグネシウ
ムオキシサルフエートを見出し、本発明に到達し
たものである。
すなわち、本発明は従来知られていない針状結
晶を束ねた扇状に結晶を成長させてなるマグネシ
ウムオキシサルフエートを提供するとともに該化
合物の製造方法を提供するものである。
本発明におけるマグネシウムオキシサルフエー
トは次の示性式で表される。
MgSO4・5MgO・8H2O
または
MgSO4・5Mg（OH）2・3H2O
本発明によればこの扇状マグネシウムオキシサ
ルフエートは次に説明する方法によつて製造され
る。
まず、硫酸マグネシウム水溶液にアルカリ金属
の水酸化物、またはその水溶液を加える。この時
の硫酸マグネシウムの水溶液濃度は飽和濃度以下
であれば良い。また、加えるアルカリ金属水酸化
物の量は硫酸マグネシウム1.0モルに対して1.7モ
ル〜0.001モル、好ましくは1.4モル〜0.3モル、さ
らに好ましくは1.2モル〜0.7モルになるように加
える。
このアルカリ金属の水酸化物の添加により、系
内には水酸化マグネシウムが生成し、固形分とな
つて水溶液中に分散すると同時に該アルカリ金属
の硫酸塩が生成する。水酸化マグネシウムを分散
した硫酸マグネシウム、およびアルカリ金属硫酸
塩の水溶液をそのまま加圧下、好ましくは1.0
Kg／cm2・Ｇ〜85Kg／cm2・Ｇの圧力下で、100〜300
℃、好ましくは150〜200℃に加熱する事により扇
状マグネシウムオキシサルフエートを得る事がで
きる。
前記示性式から明らかなように、理論的にアル
カリ金属の水酸化物を硫酸マグネシウム1.0モル
に対して1.7モル以上用いると必要以上の水酸化
マグネシウムが生成し、反応後、系内に目的物と
水酸化マグネシウムと固体が共存し、その分離が
困難になるため工業的には好ましくない。
また、扇状マグネシウムオキシサルフエートの
生成は硫酸マグネシウムとアルカリ金属の水酸化
物との反応で生成した水酸化マグネシウムをその
まま系内で水熱反応させる事により可能であり、
反応の途中で生成したアルカリ金属の硫酸塩は扇
状マグネシウムオキシサルフエートの生成に影響
を与えるものではない。
アルカリ金属の水酸化物としては任意のアルカ
リ金属水酸化物が使用でき、水酸化ナトリウム、
水酸化カリウム、水酸化リチウムが好ましく用い
られるが、特に水酸化ナトリウムが好ましい。
水熱反応の温度は100℃以下では反応時間が48
時間以上必要で好ましくない。また、300℃以上
では目的物以外の化合物が一部生成するので好ま
しくない。
本発明の水熱反応は系内に水を存在させること
が必要であり、従つて加圧下で行うことが必須の
要件であり、特に1.0〜85Kg／cm2・Ｇの範囲が装
置設計、反応効率の観点から好ましい。
さらに、本水熱反応は固液反応であるため、固
液が充分接触するよう、また固形分が沈澱してし
まわないように混合下に行うのが好ましく、反応
時間は反応温度反応圧力や系内に存在する各原料
によつて異なるが通常0.1〜20時間が適当である。
このようにして得られるマグネシウムオキシサ
ルフエートは真比重2.0〜2.5で長さ1μｍ〜100μ
ｍ、直径0.01μｍ〜10μｍ、アスペクト比（繊維
長／繊維径）10〜200を中心とする針状結晶を束
ねた扇状を呈し、見掛け比重は0.2〜0.8でBET法
による比表面積は20m2／ｇ以下である。
［発明の効果］
本発明の扇状マグネシウムオキシサルフエート
は従来知られている繊維状マグネシウムオキシサ
ルフエートに比べて見掛け比重が大きく、結晶粒
子の形態が異なつており、他の材料への分散性、
作業性が大きく改善されている。従つて、樹脂用
添加剤、充填剤、ろ過用材料、紙パルプ用添加剤
等として繊維状マグネシウムオキシサルフエート
と同等以上の効果を有する。
第１図は実施例１で得られたマグネシウムオキ
シサルフエート、第２図は比較例１で得られた繊
維状マグネシウムオキシサルフエートの各走査型
電子顕微鏡観察（二次電子像；1000倍）の写真で
ある。第１図から本発明で得られたマグネシウム
オキシサルフエートは針状結晶を束ねた扇状を呈
している事が明らかである。
［実施例］
以下実施例により説明する。
実施例 １
硫酸マグネシウム水溶液（1.2モル／Ｌ）1Lに
2N−水酸化ナトリウム水溶液600ｍＬを加え、直
ちに容量2Lの圧力容器中（圧力：９Kg／cm2・Ｇ）
180℃で５時間混合しながら反応を行つた。
反応後、生成した固形物を母液から分離、水洗
し、乾燥して平均の長さ70μｍ、平均の径0.8μｍ
の針状結晶を束ねた扇状のマグネシウムオキシサ
ルフエートを得た。この生成物の見掛け比重は
0.25であつた。得られたマグネシウムオキシサル
フエートの走査型電子顕微鏡観察の写真を第１図
に示す。
実施例 ２〜５
下記表の如き条件、混合割合において、硫酸マ
グネシウム水溶液１に各種アルカリ金属の水酸
化物の水溶液を加え、加圧下で水熱反応を行つ
た。
反応後、生成した固形物を母液から分離、水洗
し乾燥したところ、いづれも実施例１と同様な扇
状マグネシウムオキシサルフエートが得られた。
[Industrial Field of Application] The present invention relates to magnesium oxysulfate (or basic magnesium sulfate) in which crystals are grown in a fan-like shape in which needle-shaped crystals are bundled, and a method for producing the same. This fan-shaped magnesium oxysulfate can be used as an additive for resins, a filler, or a filtration material. [Prior Art] Conventionally, acicular or fibrous magnesium oxysulfate has been produced under hydrothermal synthesis conditions and used as fillers and reinforcing agents for resins, or as filtration materials and filter aids. There is. This magnesium oxysulfate is insoluble in cold water and hot water, has excellent oil absorption and moderate hygroscopicity, and has higher performance than other acicular or fibrous minerals. In addition, known methods for producing magnesium oxysulfate include metathesis of magnesium carbonate and hydrothermal reaction of magnesium sulfate with magnesium hydroxide or magnesium oxide. Magnesium oxysulfate obtained by these methods has an acicular shape. , fibrous, or lump-like. References (1) British Patent No. 3320077 (2) Walter-Levy, Comptes Rendus 202
1857 (1936) (3) JP-A-56-149318 (4) JP-A-59-86654 (5) JP-A-59-96153 [Problems to be solved by the invention] However, the needle Magnesium oxysulfate in solid or fibrous form has a very low apparent specific gravity (0.05-0.1) and is bulky, so it is difficult to mix with other materials.
There was a problem with dispersibility. [Means for Solving the Problems] The present invention increases the apparent specific gravity of fibrous magnesium oxysulfate without reducing its functionality, making it easier to handle, and further improving the ability to mix it with other materials.
As a result of intensive research to improve dispersibility,
It has the same or higher functionality as fibrous magnesium oxysulfate, has an apparent specific gravity of 0.2 or more, and can be mixed,
The present invention was achieved by discovering fan-shaped crystalline magnesium oxysulfate that has extremely good uniform dispersibility. That is, the present invention provides magnesium oxysulfate, which is formed by growing fan-shaped crystals made of bundles of needle-like crystals, which have not been known in the past, and also provides a method for producing the compound. Magnesium oxysulfate in the present invention is represented by the following formula. MgSO 4.5MgO.8H 2 O or MgSO 4.5Mg (OH) 2.3H 2 O According to the present invention, this fan-shaped magnesium oxysulfate is produced by the method described below. First, an alkali metal hydroxide or an aqueous solution thereof is added to an aqueous magnesium sulfate solution. At this time, the concentration of the aqueous solution of magnesium sulfate may be below the saturation concentration. Further, the amount of alkali metal hydroxide added is 1.7 mol to 0.001 mol, preferably 1.4 mol to 0.3 mol, more preferably 1.2 mol to 0.7 mol, per 1.0 mol of magnesium sulfate. By adding the alkali metal hydroxide, magnesium hydroxide is produced in the system, which becomes a solid and is dispersed in the aqueous solution, and at the same time, the alkali metal sulfate is produced. Magnesium sulfate in which magnesium hydroxide is dispersed and an aqueous solution of alkali metal sulfate are prepared directly under pressure, preferably at a concentration of 1.0
Under pressure of Kg/ cm2・G~85Kg/ cm2・G, 100~300
Fan-shaped magnesium oxysulfate can be obtained by heating to 150-200°C. As is clear from the above equation, if 1.7 mol or more of alkali metal hydroxide is theoretically used per 1.0 mol of magnesium sulfate, more magnesium hydroxide than necessary will be produced, and after the reaction, the target product will not be present in the system. It is not preferred industrially because solids coexist with magnesium hydroxide and their separation becomes difficult. Furthermore, fan-shaped magnesium oxysulfate can be produced by directly subjecting magnesium hydroxide, which is produced by the reaction between magnesium sulfate and an alkali metal hydroxide, to a hydrothermal reaction within the system.
The alkali metal sulfate produced during the reaction does not affect the production of fan-shaped magnesium oxysulfate. Any alkali metal hydroxide can be used as the alkali metal hydroxide, including sodium hydroxide,
Potassium hydroxide and lithium hydroxide are preferably used, and sodium hydroxide is particularly preferred. When the hydrothermal reaction temperature is below 100℃, the reaction time is 48℃.
This is not desirable as it requires more time. Further, temperatures of 300°C or higher are not preferable because some compounds other than the target compound are formed. The hydrothermal reaction of the present invention requires the presence of water in the system, and therefore it is essential to conduct it under pressure . Preferable from the viewpoint of efficiency. Furthermore, since this hydrothermal reaction is a solid-liquid reaction, it is preferable to carry out the reaction under mixing to ensure sufficient contact between solid and liquid and to prevent solid content from precipitating.The reaction time is determined depending on the reaction temperature, reaction pressure, and system. Usually, 0.1 to 20 hours is appropriate, although it varies depending on the raw materials present. The magnesium oxysulfate obtained in this way has a true specific gravity of 2.0 to 2.5 and a length of 1 μm to 100 μm.
m, diameter 0.01 μm to 10 μm, aspect ratio (fiber length/fiber diameter) 10 to 200 . g or less. [Effects of the Invention] The fan-shaped magnesium oxysulfate of the present invention has a larger apparent specific gravity and a different crystal particle morphology than conventionally known fibrous magnesium oxysulfates, and has excellent dispersibility in other materials.
Workability has been greatly improved. Therefore, it has an effect equal to or higher than that of fibrous magnesium oxysulfate as an additive for resins, fillers, filtration materials, additives for paper pulp, etc. Figure 1 shows the magnesium oxysulfate obtained in Example 1, and Figure 2 shows the fibrous magnesium oxysulfate obtained in Comparative Example 1 observed with a scanning electron microscope (secondary electron image; 1000x). It's a photo. It is clear from FIG. 1 that the magnesium oxysulfate obtained by the present invention has a fan-like shape in which needle-like crystals are bundled. [Example] Examples will be explained below. Example 1 Magnesium sulfate aqueous solution (1.2 mol/L) to 1 L
Add 600 mL of 2N sodium hydroxide aqueous solution and immediately place in a 2 L pressure vessel (pressure: 9 Kg/cm 2 G).
The reaction was carried out at 180°C for 5 hours with mixing. After the reaction, the generated solid is separated from the mother liquor, washed with water, and dried to give an average length of 70 μm and an average diameter of 0.8 μm.
A fan-shaped magnesium oxysulfate made of bundled needle-like crystals was obtained. The apparent specific gravity of this product is
It was 0.25. A photograph of the obtained magnesium oxysulfate observed under a scanning electron microscope is shown in FIG. Examples 2 to 5 Aqueous solutions of various alkali metal hydroxides were added to magnesium sulfate aqueous solution 1 under the conditions and mixing ratios shown in the table below, and a hydrothermal reaction was carried out under pressure. After the reaction, the produced solid was separated from the mother liquor, washed with water, and dried, to obtain the same fan-shaped magnesium oxysulfate as in Example 1.
【表】
比較例 １
硫酸マグネシウム水溶液（0.6モル／Ｌ）1Lに
粉末の水酸化マグネシウム3.48ｇ（0.06モル）を
分散し、容量2Lの圧力容器中（圧力：９Kg／
cm2・Ｇ）180℃で５時間混合しながら反応を行つ
た。
反応後、生成した固形物を母液から分離、水洗
し、乾燥して長さ5μｍ〜100μｍ、径が0.05μｍ〜
2μｍの繊維状結晶を得た。この生成物の見掛け
比重は0.07であつた。得られたマグネシウムオキ
シサルフエートの走査型電子顕微鏡観察の写真を
第２図に示す。[Table] Comparative Example 1 3.48 g (0.06 mol) of powdered magnesium hydroxide was dispersed in 1 L of magnesium sulfate aqueous solution (0.6 mol/L), and the mixture was dispersed in a pressure vessel with a capacity of 2 L (pressure: 9 kg/L).
cm 2 ·G) The reaction was carried out at 180°C for 5 hours with mixing. After the reaction, the generated solid is separated from the mother liquor, washed with water, and dried to give a length of 5 μm to 100 μm and a diameter of 0.05 μm to
Fibrous crystals of 2 μm were obtained. The apparent specific gravity of this product was 0.07. A photograph of the obtained magnesium oxysulfate observed under a scanning electron microscope is shown in FIG.
第１図は本発明の実施例１で得たマグネシウム
オキシサルフエートの走査型電子顕微鏡写真、第
２図は比較例１で得たマグネシウムオキシサルフ
エートの走査型電子顕微鏡写真である。尚、第１
図と第２図はともに結晶構造を示す写真である。
FIG. 1 is a scanning electron micrograph of magnesium oxysulfate obtained in Example 1 of the present invention, and FIG. 2 is a scanning electron micrograph of magnesium oxysulfate obtained in Comparative Example 1. Furthermore, the first
Both the figure and FIG. 2 are photographs showing the crystal structure.
Claims (1)
るマグネシウムオキシサルフエート。 ２ 硫酸マグネシウム水溶液にアルカリ金属の水
酸化物、またはその水溶液を硫酸マグネシウム
1.0モルに対して1.7モル〜0.001モル加えた後、加
圧下で100〜300℃に加熱し、水熱反応させる事を
特徴とする扇状マグネシウムオキシサルフエート
の製造方法。[Claims] 1. Magnesium oxysulfate formed by growing crystals in a fan shape made of bundled needle crystals. 2 Add an alkali metal hydroxide to a magnesium sulfate aqueous solution, or add the aqueous solution to magnesium sulfate.
A method for producing fan-shaped magnesium oxysulfate, which comprises adding 1.7 mol to 0.001 mol to 1.0 mol and then heating the mixture to 100 to 300°C under pressure to cause a hydrothermal reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9624885A JPS61256920A (en) | 1985-05-07 | 1985-05-07 | Sectorial magnesium oxysulfate and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9624885A JPS61256920A (en) | 1985-05-07 | 1985-05-07 | Sectorial magnesium oxysulfate and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61256920A JPS61256920A (en) | 1986-11-14 |
| JPH0436092B2 true JPH0436092B2 (en) | 1992-06-15 |
Family
ID=14159914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9624885A Granted JPS61256920A (en) | 1985-05-07 | 1985-05-07 | Sectorial magnesium oxysulfate and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61256920A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112020001313T5 (en) | 2019-03-18 | 2021-12-16 | National University Corporation Yamagata University | Polycarbonate resin composition, method for its production, masterbatch pellets and molded articles |
| DE112021002027T5 (en) | 2020-03-30 | 2023-01-12 | Ube Material Industries, Ltd. | Polypropylene resin composition, process for producing a polypropylene resin composition and molded article |
| DE112021002123T5 (en) | 2020-03-30 | 2023-01-12 | Ube Material Industries, Ltd. | Degradation promoters for biodegradable aliphatic polyester resin, biodegradable resin composition and method for accelerating the degradation of biodegradable aliphatic polyester resin |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2872449B2 (en) * | 1991-04-16 | 1999-03-17 | 宇部興産株式会社 | Method for producing fibrous anhydrous magnesium oxysulfate |
| DE4303985C1 (en) * | 1993-02-11 | 1994-06-23 | Kali & Salz Ag | Pelleting of kieserite to give a prod. of consistent stability |
| KR100340404B1 (en) * | 1999-06-30 | 2002-06-12 | 이형도 | A Method for Preparing Oxide Powder by Pressured Hydrothermal Method |
-
1985
- 1985-05-07 JP JP9624885A patent/JPS61256920A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112020001313T5 (en) | 2019-03-18 | 2021-12-16 | National University Corporation Yamagata University | Polycarbonate resin composition, method for its production, masterbatch pellets and molded articles |
| DE112021002027T5 (en) | 2020-03-30 | 2023-01-12 | Ube Material Industries, Ltd. | Polypropylene resin composition, process for producing a polypropylene resin composition and molded article |
| DE112021002123T5 (en) | 2020-03-30 | 2023-01-12 | Ube Material Industries, Ltd. | Degradation promoters for biodegradable aliphatic polyester resin, biodegradable resin composition and method for accelerating the degradation of biodegradable aliphatic polyester resin |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61256920A (en) | 1986-11-14 |
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