JPS6313971B2 - - Google Patents
Info
- Publication number
- JPS6313971B2 JPS6313971B2 JP5233285A JP5233285A JPS6313971B2 JP S6313971 B2 JPS6313971 B2 JP S6313971B2 JP 5233285 A JP5233285 A JP 5233285A JP 5233285 A JP5233285 A JP 5233285A JP S6313971 B2 JPS6313971 B2 JP S6313971B2
- Authority
- JP
- Japan
- Prior art keywords
- alkoxide
- lead
- alkali metal
- solution
- sodium
- 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
- 150000004703 alkoxides Chemical class 0.000 claims description 26
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 23
- 229910052783 alkali metal Inorganic materials 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- -1 alkali metal alkoxide Chemical class 0.000 claims description 13
- 229940046892 lead acetate Drugs 0.000 claims description 13
- 239000011734 sodium Substances 0.000 claims description 13
- 229910052708 sodium Inorganic materials 0.000 claims description 12
- 230000001476 alcoholic effect Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 9
- 150000001340 alkali metals Chemical class 0.000 claims description 9
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 229960005235 piperonyl butoxide Drugs 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 4
- 239000011591 potassium Substances 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052744 lithium Inorganic materials 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 1
- HHFAWKCIHAUFRX-UHFFFAOYSA-N ethoxide Chemical compound CC[O-] HHFAWKCIHAUFRX-UHFFFAOYSA-N 0.000 claims 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 18
- 239000000126 substance Substances 0.000 description 9
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 7
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- ZDXQHTDPMDIGFJ-UHFFFAOYSA-N ethanolate;lead(2+) Chemical compound CCO[Pb]OCC ZDXQHTDPMDIGFJ-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- IKNCGYCHMGNBCP-UHFFFAOYSA-N propan-1-olate Chemical compound CCC[O-] IKNCGYCHMGNBCP-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009766 low-temperature sintering Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 150000003388 sodium compounds Chemical class 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、低温焼結の誘電体材料を製造するに
適する鉛アルコキシドの製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing lead alkoxide suitable for producing a dielectric material for low temperature sintering.
［従来の技術］
従来、鉛アルコキシドの製造方法としてナトリ
ウムアルコキシド（NaOR）とそれに対して理論
量の酢酸鉛（Pb（CH3COO）2）とを反応させる製
造方法が知られている。これを化学反応式で示す
と次の通りである。[Prior Art] Conventionally, as a method for producing lead alkoxide, a method is known in which sodium alkoxide (NaOR) is reacted with a stoichiometric amount of lead acetate (Pb(CH 3 COO) 2 ). The chemical reaction formula for this is as follows.
Pb（CH3COO）2＋2NaOR
→Pb（OR）2＋2CH3COONa
（Ｒはアルキル基を示す。）
更に、具体的に説明すると次のような合成手順
によつて行われる。金属ナトリウムをアルコール
と反応させたナトリウムアルコキシドのアルコー
ル溶液を合成する。この溶液に理論量の酢酸鉛を
加え、撹拌しながら反応させると、上記化学反応
式のようにアルコールに可溶な鉛アルコキシドと
沈殿物として酢酸ナトリウムが生成する。これを
過すれば、液として鉛アルコキシドのアルコ
ール溶液が得られる。Pb(CH 3 COO) 2 +2NaOR →Pb(OR) 2 +2CH 3 COONa (R represents an alkyl group) More specifically, the synthesis procedure is as follows. An alcoholic solution of sodium alkoxide is synthesized by reacting sodium metal with alcohol. When a theoretical amount of lead acetate is added to this solution and reacted with stirring, alcohol-soluble lead alkoxide and sodium acetate are produced as a precipitate, as shown in the above chemical reaction formula. After this, an alcoholic solution of lead alkoxide is obtained as a liquid.
［発明が解決しようとする問題点］
しかし、この製造方法では不純物として多量の
ナトリウム成分が存在し、最低でも15％（Na／
（Na＋Pb）モル百分率）含まれる問題点があつ
た。[Problems to be solved by the invention] However, in this production method, a large amount of sodium component exists as an impurity, and at least 15% (Na/
(Na+Pb) mole percentage).
本発明の目的は、上記問題点を解決するもの
で、ナトリウム不純分の極めて少ない高純度の鉛
アルコキシドを提供することにある。 An object of the present invention is to solve the above-mentioned problems, and to provide a highly purified lead alkoxide with extremely low sodium impurities.
［問題点を解決するための手段］
本発明による高純度の鉛アルコキシドの製造方
法は次の二つの過程による。なお本明細書では
「アルコキシド」とはアルコールのOH基の水素
元素を金属元素で置換した化合物をいう。[Means for Solving the Problems] The method for producing high-purity lead alkoxide according to the present invention involves the following two steps. Note that in this specification, "alkoxide" refers to a compound in which the hydrogen element of the OH group of an alcohol is replaced with a metal element.
＜第一過程＞
先ず、従来の製造方法が理論量と等量の酢酸鉛
を用いるのに対して、本発明は理論量より過剰の
酢酸鉛を用いてアルカリ金属アルコキシドを反応
させて、鉛アルコキシドのアルコール溶液を得
る。この過剰反応量は理論量に対して1.15倍以上
であることが好ましい。1.15倍未満の場合には、
未だアルカリ金属成分が残留し好ましくない。こ
のアルカリ金属アルコキシドと過剰の酢酸鉛との
反応には、アルカリ金属アルコキシドのアルコ
ール溶液に酢酸鉛を加えて反応させる方法、或い
は酢酸鉛をアルコールに加えて懸濁液を調製し
た後、この懸濁液にアルカリ金属を加えて反応さ
せる方法がある。<First step> First, while the conventional production method uses lead acetate in an amount equivalent to the theoretical amount, the present invention uses lead acetate in excess of the theoretical amount to react with an alkali metal alkoxide to form lead alkoxide. Obtain an alcoholic solution of This excess reaction amount is preferably at least 1.15 times the theoretical amount. If it is less than 1.15 times,
Alkali metal components still remain, which is not preferable. The reaction between this alkali metal alkoxide and excess lead acetate can be carried out by adding lead acetate to an alcoholic solution of the alkali metal alkoxide, or by adding lead acetate to alcohol to prepare a suspension, and then adding this suspension to the alcohol solution. There is a method of adding an alkali metal to a liquid and causing a reaction.
＜第二過程＞
次に、この鉛アルコキシドのアルコール溶液か
らアルコールを蒸発させ留去した後、その残渣に
芳香族炭化水素化合物を鉛アルコキシドの溶解用
溶媒として加え、溶媒をアルコールから芳香族炭
化水素化合物に置換すれば、アルカリ金属不純分
は芳香族炭化水素化合物に不溶の沈殿物として析
出する。この沈殿物を過又は遠心分離により母
液から除去し、鉛アルコキシドの芳香族炭化水素
溶液を得る。<Second Step> Next, after the alcohol is evaporated and distilled off from this alcoholic solution of lead alkoxide, an aromatic hydrocarbon compound is added to the residue as a solvent for dissolving the lead alkoxide, and the solvent is converted from alcohol to aromatic hydrocarbon. When substituted with a compound, the alkali metal impurity precipitates out as an insoluble precipitate in the aromatic hydrocarbon compound. This precipitate is removed from the mother liquor by filtration or centrifugation to obtain an aromatic hydrocarbon solution of lead alkoxide.
この芳香族炭化水素を蒸発させ留去すれば単離
の純粋な鉛アルコキシドが得られるが、この化合
物は極めて湿気に鋭敏で加水分解し易いので通常
は溶液のまま保存する方が便利である。 Evaporation of the aromatic hydrocarbons yields isolated pure lead alkoxide, but since this compound is extremely sensitive to moisture and easily hydrolyzed, it is usually more convenient to store it in solution.
なお、アルカリ金属アルコキシドを例示すれば
リチウムアルコキシド、ナトリウムアルコキシ
ド、カリウムアルコキシドが挙げられる。 Note that examples of alkali metal alkoxides include lithium alkoxide, sodium alkoxide, and potassium alkoxide.
また、鉛アルコキシドの置換溶媒としての芳香
族炭化水素化合物はベンゼン、トルエン、キシレ
ン等が適当であるが、溶解度の高いベンゼンが最
適である。 In addition, as the aromatic hydrocarbon compound to be used as a replacement solvent for lead alkoxide, benzene, toluene, xylene, etc. are suitable, but benzene, which has high solubility, is most suitable.
更に、上述した一連の操作により得られる鉛ア
ルコキシドは、アルコールを工業的に広く使用さ
れるエタノール、１−プロパノール、２−プロパ
ノール、１−ブタノール、２−ブタノール等のア
ルコールのいずれかにすることにより、それぞれ
鉛エトキシド、鉛１−プロポキシド、鉛２−プロ
ポキシド、鉛１−ブトキシド、鉛２−ブトキシド
等に合成される。 Furthermore, the lead alkoxide obtained by the above-mentioned series of operations can be obtained by converting the alcohol into any of the alcohols widely used industrially such as ethanol, 1-propanol, 2-propanol, 1-butanol, and 2-butanol. , are synthesized into lead ethoxide, lead 1-propoxide, lead 2-propoxide, lead 1-butoxide, lead 2-butoxide, etc., respectively.
得られた鉛アルコキシドは、化学分析の結果、
アルカリ金属不純分が鉛に対して0.01モル％以下
の高純度の物質であつた。 As a result of chemical analysis, the obtained lead alkoxide was found to be
It was a highly pure substance with alkali metal impurities of 0.01 mol% or less based on lead.
［発明の効果］
以上述べたように、本発明によれば、アルカリ
金属アルコキシドのアルコール溶液と理論量より
過剰の酢酸鉛を反応させて鉛アルコキシドのアル
コール溶液を生成し、このアルコール溶液を芳香
族炭化水素化合物により置換することにより、ア
ルカリ金属不純分の極めて少ない高純度の鉛アル
コキシドを製造することができる。[Effects of the Invention] As described above, according to the present invention, an alcoholic solution of an alkali metal alkoxide is reacted with lead acetate in excess of the theoretical amount to produce an alcoholic solution of lead alkoxide, and this alcoholic solution is converted into an aromatic By substituting with a hydrocarbon compound, a highly purified lead alkoxide with extremely low alkali metal impurities can be produced.
なお酢酸鉛の理論量以上の使用（第一過程）、
又は芳香族炭化水素による溶媒置換（第二過程）
のいずれか一方の条件を欠いた場合には、アルカ
リ金属の含有率が２〜７モル％であることから本
発明の優れた効果が確認することができる。 In addition, if more than the theoretical amount of lead acetate is used (first step),
Or solvent replacement with aromatic hydrocarbons (second step)
When either one of these conditions is lacking, the excellent effect of the present invention can be confirmed since the alkali metal content is 2 to 7 mol%.
［実施例］
次に本発明の具体的態様を示すために、本発明
を実施例により更に詳しく説明するが、以下に示
す例はあくまでも一例であつて、これにより本発
明の技術的範囲を限定するものではない。[Examples] Next, in order to show specific embodiments of the present invention, the present invention will be explained in more detail using Examples. However, the examples shown below are merely examples, and the technical scope of the present invention is not limited thereby. It's not something you do.
実施例 １
5000ml容量の三つ口フラスコに無水２−プロパ
ノール1500mlにドライボツクス中で秤量した高純
度の金属ナトリウム50ｇを加え、20〜60℃程度で
１時間反応させ、ナトリウム２−プロポキシドの
２−プロパノール溶液を合成した。この溶液に酢
酸鉛425ｇ（理論量の1.2倍）を加え、60℃、７時
間還流して反応させた後、過し、透明な鉛２−
プロポキシドの２−プロパノール溶液を得た。Example 1 50 g of high-purity metallic sodium weighed in a dry box was added to 1500 ml of anhydrous 2-propanol in a 5000 ml three-necked flask, and the mixture was reacted at about 20 to 60°C for 1 hour. - A propanol solution was synthesized. Add 425 g of lead acetate (1.2 times the theoretical amount) to this solution, reflux at 60°C for 7 hours to react, filter, and clear lead 2-
A 2-propanol solution of propoxide was obtained.
この溶液をエバボレータにより60℃、１時間か
けて溶液から２−プロパノールを蒸発させ留去し
た。この溶液の蒸発した残渣に無水ベンゼン1000
mlを加え、ナトリウム化合物をベンゼンに不溶の
沈殿物として析出させた。このベンゼン溶液を
過して沈殿物と分離して、液として透明な鉛２
−プロポキシドのベンゼン溶液を得た。 This solution was heated to 60°C using an evaporator for 1 hour to evaporate 2-propanol from the solution. Anhydrous benzene 1000 to the evaporated residue of this solution
ml was added to precipitate the sodium compound as an insoluble precipitate in benzene. This benzene solution is filtered to separate it from the precipitate, resulting in a transparent lead 2 liquid.
- A benzene solution of propoxide was obtained.
この溶液を40℃で２時間かけてエバポレータに
よりベンゼンを蒸発させ鉛２−プロポキシド300
ｇを得た。収率は85％であつた。この物質の化学
分析を行つた結果、ナトリウム成分は0.01モル％
以下であつた。 This solution was heated to 40°C for 2 hours to evaporate benzene using an evaporator to form 300% lead 2-propoxide.
I got g. The yield was 85%. As a result of chemical analysis of this substance, the sodium content was 0.01 mol%.
It was below.
実施例 ２
実施例１で用いたアルコールを２−プロパノー
ルから１−プロパノールに代え、またアルカリ金
属をナトリウムからカリウムに代えて使用した。Example 2 The alcohol used in Example 1 was changed from 2-propanol to 1-propanol, and the alkali metal was changed from sodium to potassium.
以下実施例１と同様にして鉛１−プロポキシド
280ｇを合成した。収率は79％であつた。この物
質の化学分析を行つた結果、カリウム成分は0.01
モル％以下であつた。 Hereinafter, lead 1-propoxide was prepared in the same manner as in Example 1.
280g was synthesized. The yield was 79%. As a result of chemical analysis of this substance, the potassium content was 0.01
It was less than mol%.
実施例 ３
実施例１で用いたアルコールを２−プロパノー
ルから１−ブタノールに代えて使用した。Example 3 The alcohol used in Example 1 was replaced with 1-butanol instead of 2-propanol.
以下実施例１と同様にして鉛１−ブトキシド
311ｇを合成した。収率は81％であつた。この物
質の化学分析を行つた結果、ナトリウム成分は
0.01モル％以下であつた。 Below, lead 1-butoxide was prepared in the same manner as in Example 1.
311g was synthesized. The yield was 81%. As a result of chemical analysis of this substance, the sodium content was
It was 0.01 mol% or less.
実施例 ４
5000ml容量の三つ口フラスコに無水エタノール
2000mlに酢酸鉛425ｇを入れ室温で撹拌して懸濁
させた。この懸濁液に高純度の金属ナトリウム50
ｇを加え、50℃で７時間反応させた後、鉛エトキ
シドのエタノール溶液を合成した。Example 4 Absolute ethanol in a 5000ml three-necked flask
425 g of lead acetate was added to 2000 ml and stirred at room temperature to suspend it. This suspension contains high purity metallic sodium 50%
After reacting at 50° C. for 7 hours, an ethanol solution of lead ethoxide was synthesized.
以下実施例１と同様にして鉛エトキシド232ｇ
を合成した。収率は72％であつた。この物質の化
学分析を行つた結果、ナトリウム成分は0.01モル
％以下であつた。 232g of lead ethoxide was prepared in the same manner as in Example 1.
was synthesized. The yield was 72%. Chemical analysis of this material revealed that the sodium content was less than 0.01 mol%.
Claims (1)
と理論量より過剰の酢酸鉛を反応させて鉛アルコ
キシドのアルコール溶液を生成し、 この鉛アルコキシドの溶媒であるアルコールを
芳香族炭化水素化合物により置換して鉛アルコキ
シドを得る鉛アルコキシドの製造方法。 ２ 理論量より過剰の酢酸鉛の使用量は、理論量
の1.15倍以上である特許請求の範囲第１項に記載
の鉛アルコキシドの製造方法。 ３ アルカリ金属アルコキシドのアルカリ金属は
リチウム、ナトリウム、カリウムの中から選ばれ
た１つのアルカリ金属である特許請求の範囲第１
項又は第２項に記載の鉛アルコキシドの製造方
法。 ４ アルカリ金属アルコキシドのアルコキシドは
エトキシド、１−プロポキシド、２−プロポキシ
ド、１−ブトキシド、２−ブトキシドの中から選
ばれた１つのアルコキシドである特許請求の範囲
第１項ないし第３項のいずれかに記載の鉛アルコ
キシドの製造方法。 ５ 芳香族炭化水素化合物の溶媒はベンゼン、ト
ルエン、キシレンの中から選ばれた１つの溶媒で
ある特許請求の範囲第１項ないし第４項のいずれ
かに記載の鉛アルコキシドの製造方法。[Claims] 1. An alcoholic solution of an alkali metal alkoxide is reacted with lead acetate in excess of the theoretical amount to produce an alcoholic solution of lead alkoxide, and the alcohol, which is a solvent for the lead alkoxide, is replaced by an aromatic hydrocarbon compound. A method for producing lead alkoxide. 2. The method for producing lead alkoxide according to claim 1, wherein the amount of lead acetate used in excess of the theoretical amount is 1.15 times or more the theoretical amount. 3. Claim 1, wherein the alkali metal of the alkali metal alkoxide is one alkali metal selected from lithium, sodium, and potassium.
A method for producing lead alkoxide according to item 1 or 2. 4. Any one of claims 1 to 3, wherein the alkoxide of the alkali metal alkoxide is one alkoxide selected from ethoxide, 1-propoxide, 2-propoxide, 1-butoxide, and 2-butoxide. A method for producing lead alkoxide as described in . 5. The method for producing lead alkoxide according to any one of claims 1 to 4, wherein the solvent for the aromatic hydrocarbon compound is one solvent selected from benzene, toluene, and xylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5233285A JPS61212528A (en) | 1985-03-18 | 1985-03-18 | Production of lead alkoxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5233285A JPS61212528A (en) | 1985-03-18 | 1985-03-18 | Production of lead alkoxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61212528A JPS61212528A (en) | 1986-09-20 |
| JPS6313971B2 true JPS6313971B2 (en) | 1988-03-29 |
Family
ID=12911840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5233285A Granted JPS61212528A (en) | 1985-03-18 | 1985-03-18 | Production of lead alkoxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61212528A (en) |
-
1985
- 1985-03-18 JP JP5233285A patent/JPS61212528A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61212528A (en) | 1986-09-20 |
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