JP3429985B2 - Method for producing silver powder composed of hexagonal plate-like crystal silver particles - Google Patents
Method for producing silver powder composed of hexagonal plate-like crystal silver particlesInfo
- Publication number
- JP3429985B2 JP3429985B2 JP26959997A JP26959997A JP3429985B2 JP 3429985 B2 JP3429985 B2 JP 3429985B2 JP 26959997 A JP26959997 A JP 26959997A JP 26959997 A JP26959997 A JP 26959997A JP 3429985 B2 JP3429985 B2 JP 3429985B2
- Authority
- JP
- Japan
- Prior art keywords
- silver
- ammine complex
- salt
- silver powder
- palladium
- 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 - Fee Related
Links
Landscapes
- Parts Printed On Printed Circuit Boards (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Conductive Materials (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は新規な六角板状結晶
銀粒子からなる銀粉の製造方法に関し、より詳しくは、
電子材料用回路基板に用いられる銀ペーストの原材料と
して好適な新規な六角板状結晶銀粒子からなる銀粉の製
造方法に関する。The present invention relates to relates to a method of manufacturing a silver powder consisting of novel hexagonal plate crystal silver particles, and more particularly,
About manufacturing <br/> method for producing silver powder consisting of the preferred novel hexagonal plate crystal silver particles as a raw material of the silver paste used in the circuit substrate for electronic materials.
【０００２】[0002]
【従来の技術】従来、電子材料用回路基板に用いられる
銀ペーストの原材料銀粉として、粒状品とフレーク状品
とを混合して用いることが多かった。その理由として
は、粒状品のみを用いた場合には、ペースト化後にペー
スト中での銀粉の分離沈降が生じるし、フレーク状品の
みを用いた場合には、ペースト化の際、及び使用時の粘
度が高くなるという弊害が挙げられている。2. Description of the Related Art Conventionally, a granular material and a flake-shaped product are often mixed and used as a raw material silver powder of a silver paste used for a circuit board for electronic materials. The reason for this is that when only granular products are used, separation and settling of silver powder in the paste occurs after forming into paste, and when only flaky products are used, during paste formation and during use. It has been mentioned that the viscosity is high.
【０００３】銀粉を製造する手段として多くの技術が提
案されているが、一般的には、硝酸銀水溶液に水酸化ナ
トリウム又は炭酸ナトリウムを添加して酸化銀又は炭酸
銀を生成させ、該酸化銀又は該炭酸銀をヒドラジン等の
還元剤で還元する方法が採用されている。このようにし
て得られる銀粉は粒状品（形状は球形若しくはそれに準
じた形状）である。また、フレーク状品は、従来、電解
精製で得られた電気銀を出発原料とし、これに粉砕用の
滑剤を添加し、ボールミル、アトライター等による展延
を含む粉砕加工を加えて製造されるのが一般的である。Many techniques have been proposed as means for producing silver powder, but generally, sodium hydroxide or sodium carbonate is added to an aqueous solution of silver nitrate to produce silver oxide or silver carbonate, and the silver oxide or silver oxide is produced. A method of reducing the silver carbonate with a reducing agent such as hydrazine has been adopted. The silver powder thus obtained is a granular product (the shape is spherical or a shape similar thereto). Further, the flaky product is conventionally produced by using electric silver obtained by electrolytic refining as a starting material, adding a lubricant for pulverization to this, and performing pulverization processing including spreading by a ball mill, an attritor or the like. Is common.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記のような
手段によって得られるフレーク状品は、１０μｍを遙に
超える数十μｍレベルの一次粒子径を有しており、銀ペ
ーストに用いた際の該ペーストの充填性において満足し
得る品質とは言い難い上、微細部品の製作には不適であ
った。更にフレーク状品の当該製法においては、粉砕、
分級処理が煩雑な上、粉砕用の滑剤はフレーク中に取り
込まれて除去出来ないという欠点があるのみならず、歩
留も低く、コスト面でも問題が多かった。本発明の目的
は、かかる従来のフレーク品に代わる、銀ペーストの原
材料として好適な、全く新規の六角板状結晶銀粒子から
なる銀粉、好ましくは一次粒子径が５〜１０μｍの六角
板状結晶銀粒子からなる銀粉の製造方法を提供すること
にある。However, the flaky product obtained by the above means has a primary particle size of several tens of μm, far exceeding 10 μm, and when used in a silver paste. It cannot be said that the paste has a satisfactory filling property, and it was unsuitable for producing fine parts. Furthermore, in the manufacturing method of the flaky product, crushing,
Not only is the classification process complicated, but the lubricant for pulverization is taken into the flakes and cannot be removed, and the yield is low and there are many problems in terms of cost. An object of the present invention is to replace the conventional flake product with silver powder composed of completely novel hexagonal tabular crystalline silver particles suitable as a raw material for silver paste, preferably hexagonal tabular crystalline silver having a primary particle diameter of 5 to 10 μm. It is to provide a method for producing a silver powder consisting of particles.
【０００５】[0005]
【課題を解決するための手段】本発明者らは湿式の中和
還元法において、全く新規な形状の結晶銀粒子からなる
銀粉を得るべく鋭意研究を重ねた結果、還元反応の際に
媒晶剤として機能するパラジウム塩のアンミン錯体を用
い、還元剤として亜硫酸カリを用い、更に保護コロイド
としてゼラチンを用いることにより、前記目的が達成さ
れることを見出し、本発明を完成した。[Means for Solving the Problems] The inventors of the present invention have conducted extensive studies in the wet neutralization reduction method to obtain a silver powder composed of crystalline silver particles having a completely new shape, and as a result, habit crystals have been formed during the reduction reaction. The inventors have found that the above objects can be achieved by using an ammine complex of a palladium salt functioning as an agent, potassium sulfite as a reducing agent, and gelatin as a protective colloid, and completed the present invention.
【０００６】即ち、本発明の製造方法は、銀塩のアンミ
ン錯体及び還元反応の際に媒晶剤として機能するパラジ
ウム塩のアンミン錯体を含むスラリーと、還元剤である
亜硫酸カリ及び保護コロイドとしてのゼラチンを含有す
る溶液とを一時に混合して該銀塩のアンミン錯体を還元
し、生成した銀粒子を回収することを特徴とする六角板
状結晶銀粒子からなる銀粉の製造方法である。[0006] Immediate Chi, the production method of the present invention functions as a habit modifier in the ammine complex and a reduction reaction of a silver salt Palladium
A slurry containing an ammine complex of an um salt and a solution containing potassium sulfite as a reducing agent and gelatin as a protective colloid are mixed at one time to reduce the ammine complex of the silver salt, and the produced silver particles are recovered. This is a method for producing a silver powder composed of hexagonal plate-shaped crystal silver particles.
【０００７】本発明の製造方法において、六角板状結晶
銀粒子からなる銀粉が製造できる理由、メカニズムにつ
いては現時点では究明されていない。しかしながら、本
発明者らは銀塩をアンミン錯体化する際の溶液の液性、
還元剤の種類、添加剤の種類等を種々に変化させて数々
の試験を重ねた結果、銀塩のアンミン錯体及び還元反応
の際に媒晶剤として機能するパラジウム塩のアンミン錯
体を含むスラリーを用い、還元剤として亜硫酸カリを使
用し、保護コロイドとしてゼラチンを用い、このスラリ
ーと、亜硫酸カリ及びゼラチンを含有する溶液とを一時
に混合して該銀塩のアンミン錯体を還元することにより
六角板状結晶銀粒子からなる銀粉が得られることを見出
したものである。The reason why the silver powder composed of hexagonal plate-shaped crystal silver particles can be produced by the production method of the present invention and the mechanism thereof have not been clarified at present. However, the present inventors have found that when the silver salt is ammine-complexed, the liquidity of the solution,
As a result of various tests conducted by changing various kinds of reducing agents and kinds of additives, a slurry containing an ammine complex of a silver salt and an ammine complex of a palladium salt which functions as a habit modifier during the reduction reaction was prepared. By using potassium sulfite as the reducing agent and gelatin as the protective colloid, the slurry and a solution containing potassium sulfite and gelatin are mixed at one time to reduce the ammine complex of the silver salt, thereby producing a hexagonal plate. It was found that a silver powder composed of crystalline silver particles can be obtained.
【０００８】[0008]
【発明の実施の形態】本発明の製造方法においては、還
元反応の際に媒晶剤として機能するパラジウム塩のアン
ミン錯体を用いるが、このパラジウム塩のアンミン錯体
は生成する銀粒子の結晶面の成長方向を限定し、特定の
形状の銀粒子を安定して晶出させる性質を有しているの
で、本発明においてはこのパラジウム塩のアンミン錯体
を「媒晶剤」と表記している。In the manufacturing method of the embodiment of the present invention, it uses a ammine complexes of palladium salt that functions as a habit modifier during the reduction reaction, the crystal faces of the silver particles produced ammine complexes of the palladium salt is The ammine complex of the palladium salt is referred to as a "habit modifier" in the present invention because it has the property of limiting the growth direction and stably crystallizing silver particles having a specific shape.
【０００９】[0009]
【００１０】本発明の製造方法においては、銀塩のアン
ミン錯体及び還元反応の際に媒晶剤として機能するパラ
ジウム塩のアンミン錯体を含むスラリーを用いるのであ
るが、このスラリーとして、例えば、該銀塩及び該パラ
ジウム塩を含む溶液とアンモニア水とを混合し、反応さ
せて得られたものを用いてもよく、又は、本発明の製造
方法で生成する銀粒子を濾過により回収した後に濾液と
してパラジウム塩のアンミン錯体を含む溶液が残るの
で、この濾液である該パラジウム塩のアンミン錯体を含
む溶液に銀塩を溶解させ、次いでアンモニア水と混合
し、反応させて得られたものを用いてもよく、あるいは
この濾液である該パラジウム塩のアンミン錯体を含む溶
液と該銀塩のアンミン錯体を含むスラリーとを混合して
得られたものを用いてもよい。[0010] In the production method of the present invention, para functioning as habit modifier during ammine complex and reduction reaction of a silver salt
Although it used a slurry containing ammine complex of indium salt, as the slurry, for example, silver salts and the para
A solution obtained by mixing a solution containing a dium salt with aqueous ammonia and reacting it may be used, or after recovering the silver particles produced by the production method of the present invention by filtration, an ammine of a palladium salt is used as a filtrate. Since the solution containing the complex remains, the solution obtained by dissolving the silver salt in the solution containing the ammine complex of the palladium salt, which is the filtrate, and then mixing with ammonia water and reacting may be used, or You may use what was obtained by mixing the solution containing the ammine complex of the said palladium salt which is a filtrate, and the slurry containing the ammine complex of this silver salt.
【００１１】湿式の中和還元法による金属粉末の製造に
おいては、一般的にはヒドラジン、ハイドロサルファイ
ト、チオ硫酸ソーダ、亜硝酸ソーダ、ホルマリン等の還
元剤を用いることが多いが、これらの還元剤を使用する
と、本発明の製造方法における液性との相性が悪かった
り、還元力が不適合であったりするため、得られる銀粉
が著しく凝集したり、還元が進まなかったりという結果
しか得られない。In the production of metal powder by the wet neutralization reduction method, generally, reducing agents such as hydrazine, hydrosulfite, sodium thiosulfate, sodium nitrite and formalin are often used. When the agent is used, the compatibility with the liquid property in the production method of the present invention is poor, or the reducing power is incompatible, so that only the result that the obtained silver powder is significantly aggregated or the reduction does not proceed can be obtained. .
【００１２】しかしながら、本発明の製造方法において
還元剤として亜硫酸カリを用いることにより銀塩のアン
ミン錯体のみが還元されて六角板状結晶銀粒子からなる
銀粉が得られ、しかも凝集したり、粒度分布にバラツキ
が生じたりすることはない。この還元処理においてはパ
ラジウム塩のアンミン錯体は還元されず、溶解したまま
であり、従って、生成銀粒子を濾過により回収した後に
濾液としてパラジウム塩のアンミン錯体を含む溶液が残
る。この濾液は、前記したようにして、銀塩のアンミン
錯体及びパラジウム塩のアンミン錯体を含むスラリーを
調製するのに再利用することができる。However, when potassium sulfite is used as the reducing agent in the production method of the present invention, only the ammine complex of the silver salt is reduced to obtain silver powder consisting of hexagonal plate-shaped crystal silver particles, and further, agglomeration and particle size distribution There is no variation. Pa In this reduction treatment
The ammine complex of the radium salt is not reduced and remains dissolved, thus leaving a solution containing the ammine complex of the palladium salt as the filtrate after recovering the produced silver particles by filtration. This filtrate can be reused as described above to prepare a slurry containing an ammine complex of a silver salt and an ammine complex of a palladium salt.
【００１３】本発明の製造方法においては、銀塩のアン
ミン錯体を還元する際に保護コロイドとしてゼラチンを
添加することが重要である。一般的には、保護コロイド
として、反応液中の疎水コロイドの安定度を保つ親水性
コロイドが使われることが多い。このような保護コロイ
ドを使用しない場合には、得られる銀粉が著しく凝集し
たり、粒度分布にバラツキが生じたりし、また、ゼラチ
ン以外の保護コロイドを用いた場合には、六角板状結晶
銀粒子からなる銀粉を得ることは不可能であるか又は極
めて困難である。In the production method of the present invention, it is important to add gelatin as a protective colloid when reducing the ammine complex of silver salt. Generally, a hydrophilic colloid that maintains the stability of the hydrophobic colloid in the reaction solution is often used as the protective colloid. When such protective colloid is not used, the obtained silver powder remarkably aggregates or the particle size distribution varies, and when a protective colloid other than gelatin is used, hexagonal tabular crystal silver particles It is impossible or extremely difficult to obtain silver powder consisting of
【００１４】本発明の製造方法においては、銀塩のアン
ミン錯体及びパラジウム塩を含むスラリーと、亜硫酸カ
リ及びゼラチンを含有する溶液とを一時に混合すること
が重要である。この混合の際に分割して添加したり、あ
るいは徐々に添加した場合、結晶核が多量に発生し、銀
粒子の成長が阻害されるのみならず、目的とする六角板
状結晶銀粒子からなる銀粉が得られない。In the production method of the present invention, it is important to mix the slurry containing the ammine complex of silver salt and the palladium salt with the solution containing potassium sulfite and gelatin at once. If added in a divided manner or gradually added during this mixing, not only the crystal nuclei are generated in a large amount and the growth of silver particles is inhibited, but also the hexagonal tabular crystalline silver particles of interest are formed. I can't get silver dust.
【００１５】本発明の製造方法においては、上記した諸
工程によって生成した銀粒子からなる銀粉を洗浄、濾
過、乾燥等の常法に従って回収する。以上の諸工程によ
り、従来のフレーク品に代わる、銀ペーストの原材料用
として好適な全く新規な六角板状結晶銀粒子からなる銀
粉を得ることができ、この六角板状結晶銀粒子からなる
銀粉は、従来のフレーク状銀粉に較べてはるかに低コス
トで不純物が少なく、粒状品と混合して、電子材料用回
路基板に用いられる銀ペーストの原材料銀粉として用い
ることができる。In the production method of the present invention, the silver powder consisting of silver particles produced by the above-mentioned steps is recovered by a conventional method such as washing, filtration and drying. Through the above steps, a completely new silver powder composed of hexagonal plate-shaped crystal silver particles suitable for a raw material of a silver paste, which replaces a conventional flake product, can be obtained. As compared with the conventional flake-shaped silver powder, the cost is much lower and the amount of impurities is smaller, and it can be used as a raw material silver powder of a silver paste used for a circuit board for electronic materials by mixing with granular products.
【００１６】[0016]
【実施例】以下、実施例及び比較例によって本発明を具
体的に説明するが、本発明はかかる事例に限定されるも
のではない。
実施例
Ａｇ：Ｐｄの重量比が７：３となり、ＡｇとＰｄとの合
計重量が３００ｇとなるような硝酸銀と硝酸パラジウム
との混合溶液３００ｍｌを用意し、これにアンモニア水
（ＮＨ3 濃度２５重量％）３００ｍｌを加えて硝酸銀の
アンミン錯体及び硝酸パラジウムのアンミン錯体を形成
させ、これらのアンミン錯体を含むスラリーを得た。EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to such cases. Example Ag: weight ratio of Pd is 7: 3, and the total weight of Ag and Pd is prepared mixed solution 300ml of silver nitrate and palladium nitrate such that 300 g, which aqueous ammonia (NH 3 concentration of 25 wt %) 300 ml to form an ammine complex of silver nitrate and an ammine complex of palladium nitrate to obtain a slurry containing these ammine complexes.
【００１７】一方、純水２．５リットルにゼラチン１０
ｇを溶解させたものに亜硫酸カリ１５０ｇを加え、充分
に溶解させた後、濾紙で濾過した。該ゼラチン含有亜硫
酸カリ溶液に上記の硝酸銀のアンミン錯体及び硝酸パラ
ジウムのアンミン錯体を含むスラリーを一時に投入し、
温度を８０℃に保持しながら還元反応を行った。生成し
た銀粉を常法の濾過・洗浄処理・乾燥によって回収し
た。上記のようにして回収した銀粉の電子顕微鏡写真
（倍率：５０００倍）を図１に示す。図１から明らかな
ように、当該銀粉の形状は均整な六角板状を呈してお
り、その１次粒子の粒径は５〜１０μｍであることが分
かる。On the other hand, gelatin is added to 2.5 liters of pure water.
After dissolving 150 g, 150 g of potassium sulfite was added and sufficiently dissolved, and then filtered with a filter paper. To the gelatin-containing potassium sulfite solution, a slurry containing the above-mentioned silver nitrate ammine complex and palladium nitrate ammine complex was added at a time,
The reduction reaction was carried out while maintaining the temperature at 80 ° C. The produced silver powder was collected by a conventional filtration, washing treatment and drying. An electron micrograph (magnification: 5000 times) of the silver powder collected as described above is shown in FIG. As is clear from FIG. 1, the shape of the silver powder has a uniform hexagonal plate shape, and the primary particles have a particle size of 5 to 10 μm.
【００１８】比較例１
アンミン錯体を作成する過程で硝酸パラジウムを加えな
かった以外は、実施例と同様の方法によって銀粉を得
た。このようにして回収した銀粉は実施例で回収した銀
粉に較べ、凝集が著しく、形状も六角板状とは言い難い
ものであった。Comparative Example 1 Silver powder was obtained in the same manner as in Example except that palladium nitrate was not added in the process of preparing an ammine complex. The silver powder collected in this manner was more agglomerated than the silver powder collected in the examples, and it was difficult to say that it had a hexagonal plate shape.
【００１９】比較例２
還元剤として亜硫酸カリの代わりに、ヒドラジン（１０
０％抱水品）４７ｇを用いた以外は、実施例と同様の方
法によって銀粉を回収した。このようにして回収した銀
粉は実施例で回収した銀粉に較べ、凝集が著しく、形状
も六角板状とは言い難いものであった。Comparative Example 2 Instead of potassium sulfite as a reducing agent, hydrazine (10
Silver powder was recovered by the same method as in Example except that 47 g of 0% hydrated product was used. The silver powder collected in this manner was more agglomerated than the silver powder collected in the examples, and it was difficult to say that it had a hexagonal plate shape.
【００２０】比較例３
還元剤として亜硫酸カリの代わりに、ハイドロサルファ
イト１６５ｇを用いた以外は、実施例と同様の方法によ
って銀粉を回収した。このようにして回収した銀粉は実
施例で回収した銀粉に較べ、凝集が著しく、形状も六角
板状とは言い難いものであった。Comparative Example 3 Silver powder was recovered by the same method as in Example except that 165 g of hydrosulfite was used as the reducing agent instead of potassium sulfite. The silver powder collected in this manner was more agglomerated than the silver powder collected in the examples, and it was difficult to say that it had a hexagonal plate shape.
【００２１】[0021]
【発明の効果】本発明の銀粉は、好ましくは一次粒子径
が５〜１０μｍの全く新規な六角板状結晶銀粒子からな
る銀粉であり、従来のフレーク状銀粉に較べてはるかに
低コストで不純物が少なく、粒状品と混合して、電子材
料用回路基板に用いられる銀ペーストの原材料銀粉とし
て用いることができる。INDUSTRIAL APPLICABILITY The silver powder of the present invention is a silver powder composed of completely novel hexagonal plate-shaped crystal silver particles having a primary particle size of 5 to 10 μm, which is far cheaper than conventional flake silver powders as impurities. However, it can be used as a raw material silver powder of a silver paste used for a circuit board for electronic materials by mixing with a granular product.
【図１】 実施例で得た銀粉の電子顕微鏡写真である。FIG. 1 is an electron micrograph of silver powder obtained in an example.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B22F 9/24 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) B22F 9/24
Claims (4)
晶剤として機能するパラジウム塩のアンミン錯体を含む
スラリーと、還元剤である亜硫酸カリ及び保護コロイド
としてのゼラチンを含有する溶液とを一時に混合して該
銀塩のアンミン錯体を還元し、生成した銀粒子を回収す
ることを特徴とする六角板状結晶銀粒子からなる銀粉の
製造方法。1. A slurry containing an ammine complex of a silver salt and an ammine complex of a palladium salt which functions as a habit modifier during a reduction reaction, and a solution containing potassium sulfite as a reducing agent and gelatin as a protective colloid. A method for producing a silver powder comprising hexagonal plate-shaped crystal silver particles, which comprises mixing at once to reduce the ammine complex of the silver salt and recovering the produced silver particles.
晶剤として機能するパラジウム塩のアンミン錯体を含む
スラリーが、該銀塩及び該パラジウム塩を含む溶液とア
ンモニア水とを混合し、反応させて得られたものである
ことを特徴とする請求項１記載の製造方法。2. A slurry containing an ammine complex of a silver salt and an ammine complex of a palladium salt which functions as a habit modifier during a reduction reaction is prepared by mixing a solution containing the silver salt and the palladium salt with aqueous ammonia. the process according to claim 1, wherein a is obtained by reacting.
晶剤として機能するパラジウム塩のアンミン錯体を含む
スラリーが、該パラジウム塩のアンミン錯体を含む溶液
に銀塩を溶解させ、次いでアンモニア水と混合し、反応
させて得られたものであることを特徴とする請求項１記
載の製造方法。3. A slurry containing an ammine complex of a silver salt and an ammine complex of a palladium salt which functions as a habit modifier during a reduction reaction, the silver salt being dissolved in a solution containing the ammine complex of the palladium salt, and then ammonia. mixed with water, the process according to claim 1, wherein a is obtained by reacting.
晶剤として機能するパラジウム塩のアンミン錯体を含む
スラリーが、該パラジウム塩のアンミン錯体を含む溶液
と該銀塩のアンミン錯体を含むスラリーとを混合して得
られたものであることを特徴とする請求項１記載の製造
方法。4. A slurry containing an ammine complex of a silver salt and an ammine complex of a palladium salt which functions as a habit modifier during a reduction reaction contains a solution containing the ammine complex of the palladium salt and an ammine complex of the silver salt. the process according to claim 1, wherein a is obtained by mixing the slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26959997A JP3429985B2 (en) | 1997-10-02 | 1997-10-02 | Method for producing silver powder composed of hexagonal plate-like crystal silver particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26959997A JP3429985B2 (en) | 1997-10-02 | 1997-10-02 | Method for producing silver powder composed of hexagonal plate-like crystal silver particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11106806A JPH11106806A (en) | 1999-04-20 |
| JP3429985B2 true JP3429985B2 (en) | 2003-07-28 |
Family
ID=17474616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26959997A Expired - Fee Related JP3429985B2 (en) | 1997-10-02 | 1997-10-02 | Method for producing silver powder composed of hexagonal plate-like crystal silver particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3429985B2 (en) |
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-
1997
- 1997-10-02 JP JP26959997A patent/JP3429985B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014050156A1 (en) | 2012-09-27 | 2014-04-03 | 三ツ星ベルト株式会社 | Conductive composition and conductive molded body using same |
| US11242471B2 (en) | 2014-02-24 | 2022-02-08 | Mitsuboshi Belting Ltd. | Conductive composition and conductive molded article |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11106806A (en) | 1999-04-20 |
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