JP2000086992A - Binder for ceramic - Google Patents
Binder for ceramicInfo
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- JP2000086992A JP2000086992A JP10270474A JP27047498A JP2000086992A JP 2000086992 A JP2000086992 A JP 2000086992A JP 10270474 A JP10270474 A JP 10270474A JP 27047498 A JP27047498 A JP 27047498A JP 2000086992 A JP2000086992 A JP 2000086992A
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- pva
- binder
- low
- water
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- Compositions Of Macromolecular Compounds (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、セラミックスの成
形に用いられるバインダーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binder used for forming ceramics.
【０００２】[0002]
【従来の技術】従来、非水溶液の粉体、例えばセラミッ
クス原料、活性汚泥焼却灰、高炉スラグ等をポリビニル
アルコール（以下、ＰＶＡと略記する）やメチルセルロ
ース（ＭＣ）、カルボキシメチルセルロース（ＣＭ
Ｃ）、デンプン類、アクリル系樹脂エマルジョンや酢酸
ビニル系樹脂エマルジョンをバインダーとして用いて成
形することは広く行われてきた。2. Description of the Related Art Conventionally, non-aqueous powders such as ceramic raw materials, activated sludge incineration ash, blast furnace slag, etc. have been conventionally used for polyvinyl alcohol (hereinafter abbreviated as PVA), methylcellulose (MC), carboxymethylcellulose (CM).
Molding using C), starches, acrylic resin emulsions or vinyl acetate resin emulsions as binders has been widely performed.
【０００３】特に、電子材料に用いられるような精密部
品を成形する際には、セラミックス等の原料粉体の造粒
用バインダーとして、低重合度、低鹸化度のＰＶＡが多
く用いられてきた。この理由としては、低重合度、低鹸
化度のＰＶＡを用いることにより、造粒物の粒子径を均
一にすることができ、しかも成形の際に粒子がつぶれや
すく、成形物の充填密度が高くなるからである。In particular, when molding precision parts such as those used for electronic materials, PVA with a low degree of polymerization and a low degree of saponification has often been used as a binder for granulating raw material powders such as ceramics. The reason for this is that by using PVA having a low degree of polymerization and a low degree of saponification, the particle size of the granulated product can be made uniform, and the particles are easily crushed during molding, and the packing density of the molded product is high. Because it becomes.
【０００４】しかしながら、近年、セラミックス原料粉
体の粒子径が従来のものの半分またはそれ以下のものが
出てきており、これら粒子径の小さいセラミックス原料
を従来の方法で造粒すると、得られた造粒物の流動性に
問題があったり、プレス成形した際に目標とする充填密
度に達しないという問題が生じてきた。[0004] However, in recent years, ceramic raw material powders having a particle diameter that is half or less than that of conventional ceramic powders have appeared, and when these ceramic raw materials having a small particle diameter are granulated by a conventional method, the resulting granules are obtained. There have been problems in that there is a problem in the fluidity of the granules and that the target packing density does not reach the target when pressed.
【０００５】これを解決するする１つの手段としては、
ＰＶＡの重合度を下げることが考えられる。しかしなが
ら、ＰＶＡの製法としては工業的にはメタノールを溶媒
とする溶液重合で得たポリ酢酸ビニルをアルカリ触媒を
用いてケン化して得る方法が採用されており、この方法
で工業的に得られる汎用ＰＶＡは、経済性、品質面から
重合度が３００以上であることが知られている。これ以
下の重合度のＰＶＡを製造する方法としては、酢酸ビニ
ルの重合の際にメタノールの代わりに連鎖移動定数の高
いエタノールやイソプロパノールを用いる方法（特公昭
５２−１７８７４号公報）やアルデヒドやメルカプタン
類等の連鎖移動剤を併用する方法（特公平１−４００４
３号公報）が提案されている。[0005] One means for solving this is as follows.
It is conceivable to lower the degree of polymerization of PVA. However, as a method for producing PVA, a method in which polyvinyl acetate obtained by solution polymerization using methanol as a solvent is saponified using an alkali catalyst has been industrially adopted. PVA is known to have a degree of polymerization of 300 or more from the viewpoint of economy and quality. As a method of producing PVA having a polymerization degree of less than this, a method of using ethanol or isopropanol having a high chain transfer constant instead of methanol in the polymerization of vinyl acetate (Japanese Patent Publication No. 52-17874), aldehydes and mercaptans Using a chain transfer agent such as (JP-B 1-4004)
No. 3) has been proposed.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、これら
の方法で重合度の低いポリ酢酸ビニルを重合することは
できても、従来の脱モノマー設備やケン化設備をそのま
ま流用することができず、新たに付帯設備を設ける必要
があり、セラミックス原料粉体のバインダーとして用い
るにはＰＶＡが非常に高価なものになるという問題があ
った。However, even though polyvinyl acetate having a low degree of polymerization can be polymerized by these methods, the conventional demonomerization equipment or saponification equipment cannot be used as it is, and a new method is required. However, there is a problem that PVA becomes very expensive for use as a binder for ceramic raw material powder.
【０００７】また、粒子径が小さいセラミックス原料粉
体の造粒バインダーとして低重合度のＰＶＡを用いて
も、得られた造粒物の流動性やつぶれ性に問題があり、
複雑な形状の成形物ができなかったり、充填密度が低く
て必要な電気特性が発揮されなかったりという問題があ
った。[0007] Even when PVA having a low degree of polymerization is used as a granulating binder for a ceramic raw material powder having a small particle size, there is a problem in the fluidity and crushability of the obtained granulated product,
There were problems that a molded article having a complicated shape could not be obtained, and that the required electric characteristics could not be exhibited due to a low packing density.
【０００８】本発明は、かかる現状に鑑み、所望の低重
合度のＰＶＡを工業的に安価に製造することができるこ
とにより、良好なセラミックス用バインダーを安価に提
供するとともに、しかもセラミックス粉体の造粒・成形
に用いることにより、均一で流動性が良い造粒物が得ら
れ、成形の際に造粒粒子のつぶれ性が良く、低いプレス
圧で良好な充填密度の成形物を得ることができるセラミ
ックス用バインダーを提供することを目的とするもので
ある。In view of the above situation, the present invention can provide a good binder for ceramics at low cost by being able to industrially produce PVA having a desired low polymerization degree at low cost, and furthermore, to produce ceramic powder. By using it for granulation and molding, a uniform granulated material with good fluidity can be obtained, the granulated particles can be crushed well during molding, and a molded product with good packing density can be obtained with a low press pressure. It is an object of the present invention to provide a ceramic binder.
【０００９】[0009]
【課題を解決するための手段】本発明は、上記目的を達
成するものであって、酸化剤でＰＶＡの主鎖を開裂して
低重合度化したＰＶＡに可塑剤と水溶性または水分散性
のワックスとを配合してなることを特徴とするものであ
る。DISCLOSURE OF THE INVENTION The present invention has been accomplished to achieve the above-mentioned object, and a plasticizer and a water-soluble or water-dispersible resin are added to PVA having a low polymerization degree by cleaving the main chain of PVA with an oxidizing agent. And a wax.
【００１０】[0010]
【発明の実施の形態】以下、本発明を詳細に説明する。
本発明で使用されるＰＶＡは、酸化剤で主鎖開裂して低
重合度化したＰＶＡであるが、この原料として用いられ
るＰＶＡとしては、一般に工業的に製造され、市販され
ている重合度が３００以上のものが使用される。また、
ここで使用されるＰＶＡは、本発明を損なわない範囲
で、例えば、アクリル酸等の不飽和一塩基酸またはその
塩、マレイン酸、イタコン酸、フマル酸等の不飽和二塩
基酸またはその塩、あるいはマレイン酸モノメチル、イ
タコン酸モノメチル等の不飽和二塩基酸モノアルキルエ
ステル類、（メタ）アクリル酸エステル類、アクリルア
ミド、ジメチルアクリルアミド、Ｎ−メチロ−ルアクリ
ルアミド、Ｎ−ビニル−２−ピロリドン等のアミド基含
有単量体、ラウリルビニルエーテル、ステアリルビニル
エーテル等のアルキルビニルエーテル、エチレン、スチ
レン等の酢酸ビニルと共重合可能な公知のモノマーと共
重合したり、また、ＰＶＡをエポキシ基含有化合物、イ
ソシアネート基含有化合物等の反応性基を含有する化合
物を公知の方法で後反応して得たＰＶＡを用いても良
い。ＰＶＡのケン化度は特に制限はないが、通常ケン化
度が６０モル％以上のものが使用される。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The PVA used in the present invention is a PVA whose main chain is cleaved with an oxidizing agent to reduce the degree of polymerization. The PVA used as a raw material is generally manufactured industrially and has a degree of polymerization that is commercially available. More than 300 are used. Also,
PVA used herein is, for example, an unsaturated monobasic acid such as acrylic acid or a salt thereof, an unsaturated dibasic acid such as maleic acid, itaconic acid, and fumaric acid or a salt thereof within a range not impairing the present invention; Or amides such as unsaturated dibasic acid monoalkyl esters such as monomethyl maleate and monomethyl itaconate, (meth) acrylic esters, acrylamide, dimethylacrylamide, N-methylolacrylamide, and N-vinyl-2-pyrrolidone Group-containing monomer, lauryl vinyl ether, alkyl vinyl ether such as stearyl vinyl ether, copolymerized with a known monomer copolymerizable with vinyl acetate such as ethylene and styrene, or PVA with epoxy group-containing compound, isocyanate group-containing compound A compound containing a reactive group such as It may be used PVA obtained by response. The degree of saponification of PVA is not particularly limited, but those having a saponification degree of 60 mol% or more are usually used.
【００１１】ＰＶＡ主鎖を開裂して低重合度化するのに
使用される酸化剤は、たとえば過酸化水素、オゾン、過
ヨウ素酸またはその塩類、過マンガン酸またはその塩等
があげられる。中でも、金属を含まない過ヨウ素酸、過
酸化水素等の酸化剤が好ましい。特に、過ヨウ素酸は、
ＰＶＡの主鎖中に２モル％程度存在する１，２−グリコ
ール結合を選択的に開裂するので、低重合度化には特に
有効である。The oxidizing agent used to reduce the degree of polymerization by cleaving the PVA main chain includes, for example, hydrogen peroxide, ozone, periodic acid or salts thereof, permanganic acid or salts thereof, and the like. Among them, oxidizing agents such as periodic acid and hydrogen peroxide containing no metal are preferable. In particular, periodic acid
It is particularly effective for lowering the degree of polymerization because it selectively cleaves 1,2-glycol bonds present in about 2 mol% in the main chain of PVA.
【００１２】本発明に使用される酸化剤の添加量は所望
の重合度の得られるような添加量でよく、特に制限はな
いが、低重合度化したＰＶＡの重合度が、５０〜３８
０、好ましくは６０〜２５０程度になるような量が好ま
しい。The amount of the oxidizing agent to be used in the present invention may be any amount so as to obtain a desired degree of polymerization, and is not particularly limited.
The amount is preferably 0, preferably about 60 to 250.
【００１３】本発明で使用される酸化剤により主鎖を開
裂したＰＶＡは、末端がアルデヒド基となるため、化学
的に不安定であり、水溶液の粘度が高くなったり、ゲル
化したりする場合がある。The PVA whose main chain is cleaved by the oxidizing agent used in the present invention is chemically unstable since the terminal is an aldehyde group, and the viscosity of the aqueous solution may increase or gelation may occur. is there.
【００１４】このような現象を避けるには、末端のアル
デヒドを例えば水素化アルミニウムリチウム、水素化硼
酸ナトリウム等の金属水素化物、亜硫酸水素ナトリウム
等の亜硫酸塩等の還元剤により処理する方法や、水酸化
ナトリウム、アンモニア、モノエタノールアミン等の塩
基性物質で中性付近にｐＨを調整する方法がある。中で
も、アンモニア、モノエタノールアミン等の揮発性のｐ
Ｈ調製剤でｐＨを中性付近に調整する方法が好ましい。In order to avoid such a phenomenon, a method of treating the terminal aldehyde with a reducing agent such as a metal hydride such as lithium aluminum hydride or sodium borohydride, or a sulfite such as sodium hydrogen sulfite, or water There is a method of adjusting the pH to around neutral with a basic substance such as sodium oxide, ammonia, and monoethanolamine. Among them, volatile p such as ammonia and monoethanolamine
A method of adjusting the pH to around neutral with an H preparation agent is preferred.
【００１５】本発明で使用する可塑剤としては、グリセ
リン、ジグリセリン、また、エチレングリコール、トリ
エチレングリコール等のグリコール類、ソルビトール、
エタノールアミン、エタノールアセトアミド、尿素等を
挙げることができ、ＰＶＡに対して可塑効果があるもの
であれば良いが、なかでもグリセリンが好ましい。The plasticizer used in the present invention includes glycerin, diglycerin, glycols such as ethylene glycol and triethylene glycol, sorbitol,
Ethanolamine, ethanolacetamide, urea and the like can be mentioned, and any substance having a plasticizing effect on PVA can be used, and glycerin is particularly preferable.
【００１６】本発明で使用される可塑剤の添加量として
は、ＰＶＡ１００重量部に対して２〜６０重量部、好ま
しくは５〜５０重量部であることが望ましい。The amount of the plasticizer used in the present invention is 2 to 60 parts by weight, preferably 5 to 50 parts by weight, per 100 parts by weight of PVA.
【００１７】本発明で使用する水溶性または水分散性ワ
ックスとしては、平均分子量１０００以上のポリエチレ
ングリコール、ステアリン酸またはその塩等が挙げられ
る。水溶性または水分散性ワックスの添加量はＰＶＡ１
００重量部に対して０．０５〜２０重量部、好ましくは
０．１〜１５重量部であることが望ましい。The water-soluble or water-dispersible wax used in the present invention includes polyethylene glycol having an average molecular weight of 1,000 or more, stearic acid or a salt thereof. The amount of the water-soluble or water-dispersible wax added is PVA1.
It is desirably 0.05 to 20 parts by weight, preferably 0.1 to 15 parts by weight, based on 00 parts by weight.
【００１８】本発明のセラミックス用バインダーの調製
方法について説明する。ＰＶＡの水への溶解方法は通常
のＰＶＡと同様で良く、ＰＶＡを溶解する際に酸化剤を
所定量添加して加温・溶解することにより所望の重合度
のＰＶＡ水溶液が得られる。また、可塑剤、水溶性また
は水分散性ワックスは、それぞれ水に溶解・分散したも
のをＰＶＡ水溶液に混合しても、ＰＶＡの水溶液に可塑
剤、水溶性または水分散性ワックスを直接添加してかま
わない。The method for preparing the ceramic binder of the present invention will be described. The method of dissolving PVA in water may be the same as that of ordinary PVA. When dissolving PVA, a predetermined amount of an oxidizing agent is added, followed by heating and dissolving to obtain a PVA aqueous solution having a desired degree of polymerization. The plasticizer and the water-soluble or water-dispersible wax may be dissolved and dispersed in water and mixed with the aqueous PVA solution, but the plasticizer, the water-soluble or water-dispersible wax may be directly added to the aqueous PVA solution. I don't care.
【００１９】本発明のセラミックス用バインダーを用い
てセラミックス原料粉体を造粒する場合、セラミックス
原料粉体と本発明のバインダーとの混合スラリーをスプ
レー造粒しても、パン型造粒機を用いて造粒しても、ニ
ーダー型造粒機等の混練機を用いて造粒してもよく、工
業的に使用される造粒機であれば使用できる。その際、
本発明のバインダーの添加量には特に制限はないが、造
粒物の堅さや、目標とする充填密度によってセラミック
ス原料粉体１００重量部に対して、０．１重量部から２
０重量部の範囲で添加されるのが一般的である。In the case of granulating the ceramic raw material powder using the ceramic binder of the present invention, even if a mixed slurry of the ceramic raw material powder and the binder of the present invention is spray-granulated, a pan-type granulator is used. Granulation using a kneader such as a kneader-type granulator may be used, and any granulator that is industrially used can be used. that time,
The amount of the binder of the present invention is not particularly limited. However, depending on the hardness of the granulated material and the target packing density, 0.1 to 2 parts by weight based on 100 parts by weight of the ceramic raw material powder.
It is generally added in the range of 0 parts by weight.
【００２０】また、本発明のバインダー水溶液または原
料スラリー調製の際に、本発明の効果を損なわない範囲
で、上記以外の添加物、例えば、離型剤、防錆剤、帯電
防止剤、防かび剤、消泡剤やジアルデヒド類、エポキシ
化合物、ホウ素化合物、ジルコニウム化合物、イソシア
ネート化合物等の架橋剤類を添加しても良い。In preparing the aqueous binder solution or raw material slurry of the present invention, additives other than those described above, for example, a releasing agent, a rust preventive, an antistatic agent, and a mold preventive are provided as long as the effects of the present invention are not impaired. A crosslinking agent such as an agent, an antifoaming agent, a dialdehyde, an epoxy compound, a boron compound, a zirconium compound, or an isocyanate compound may be added.
【００２１】本発明のバインダーをセラミックスの造粒
・成形等に用いた場合、造粒物の粒子径が均一となるよ
うに造粒することができ、しかもワックスの効果により
造粒物の流動性が良くなる。また、プレス成形した際
に、ワックスの滑り、可塑剤の効果及びＰＶＡの低重合
度化により造粒粒子のつぶれ性が良く、低いプレス圧で
充填密度を向上させることができる。When the binder of the present invention is used for granulation and molding of ceramics, granulation can be performed so that the particle diameter of the granulated material becomes uniform, and the fluidity of the granulated material is controlled by the effect of the wax. Will be better. In addition, upon press molding, the slippage of the wax, the effect of the plasticizer, and the reduction in the degree of polymerization of PVA make the granulated particles crushable, and the packing density can be improved with a low pressing pressure.
【００２２】[0022]
【実施例】以下、実施例により本発明をさらに具体的に
説明する。 （実施例１） （Ａ）低重合度ＰＶＡの調製 重合度５００、ケン化度８８モル％のＰＶＡ１００ｇ
に、過ヨウ素酸を１．３ｇ、水を２３０ｇ添加して、８
０℃で１時間加熱して溶解して主鎖を開裂した。得られ
たＰＶＡの重合度は２４０であった。 （Ｂ）バインダー液の調製 （Ａ）で得られた重合度２４０のＰＶＡ水溶液３００ｇ
にグリセリンを１０ｇ、平均分子量２０００のポリエチ
レングリコールを１０ｇ添加して混合してバインダー液
を得た。The present invention will be described more specifically with reference to the following examples. (Example 1) (A) Preparation of low polymerization degree PVA 100 g of PVA having a polymerization degree of 500 and a saponification degree of 88 mol%
Then, 1.3 g of periodic acid and 230 g of water were added, and 8
The mixture was heated at 0 ° C. for 1 hour to dissolve and cleave the main chain. The polymerization degree of the obtained PVA was 240. (B) Preparation of binder liquid 300 g of PVA aqueous solution having a polymerization degree of 240 obtained in (A)
Was added with 10 g of glycerin and 10 g of polyethylene glycol having an average molecular weight of 2,000, followed by mixing to obtain a binder solution.
【００２３】（Ｃ）原料スラリーの調製 平均粒子径が０．４μｍのチタン酸バリウム粉末５００
ｇ、（Ｂ）で得たバインダー液を３３ｇ、解こう剤とし
て低分子量ポリアクリル酸アンモニウム塩２．５ｇをボ
ールミルにいれ、スラリー濃度が７０％になるように水
を添加した後、１２時間混練してスラリーを得た。 （Ｄ）造粒 （Ｃ）で得た原料スラリーを、スプレードライヤー（熱
風温度 入り口温度１１０℃、出口温度 ４５℃）を用
いて平均粒子径８０μｍの顆粒状の粒子に造粒した。 （Ｅ）プレス成形 （Ｄ）で得た造粒物を幅４０mm、長さ６０mm、深さ４０
mmの金型に入れ、常温でプレス圧１０００Kg/cm2にてプ
レスして成形物を作成した。(C) Preparation of Raw Material Slurry Barium titanate powder 500 having an average particle size of 0.4 μm
g, 33 g of the binder solution obtained in (B) and 2.5 g of a low-molecular-weight ammonium polyacrylate as a peptizer in a ball mill, and water was added so that the slurry concentration became 70%, followed by kneading for 12 hours. Thus, a slurry was obtained. (D) Granulation The raw material slurry obtained in (C) was granulated into granular particles having an average particle diameter of 80 µm using a spray drier (hot air temperature: inlet temperature 110 ° C, outlet temperature 45 ° C). (E) Press molding The granulated material obtained in (D) is 40 mm in width, 60 mm in length and 40 in depth.
It was placed in a mold of mm and pressed at a normal temperature under a pressure of 1000 kg / cm 2 to form a molded product.
【００２４】得られた成形物の密度及びグリーン強度を
測定した。密度は２．６５ g/cm2、グリーン強度は２
５．３Kg/cm2で、目標とする成形物を得ることができ
た。The density and green strength of the obtained molded product were measured. Density 2.65 g / cm 2 , green strength 2
At 5.3 kg / cm 2 , a target molded product could be obtained.
【００２５】（実施例２）実施例１で使用したＰＶＡに
換えて、重合度１６００、ケン化度８１モル％のＰＶＡ
を使用し、過ヨウ素酸ナトリウムを４ｇに増やした他は
同様にして実験を行った。密度は２．５８ g/cm2、グリ
ーン強度は２６．２Kg/cm2で、目標とする成形物を得る
ことができた。Example 2 PVA having a polymerization degree of 1600 and a saponification degree of 81 mol% was used in place of the PVA used in Example 1.
, And the experiment was carried out in the same manner except that the amount of sodium periodate was increased to 4 g. The density was 2.58 g / cm 2 , the green strength was 26.2 kg / cm 2 , and a target molded product could be obtained.
【００２６】（比較例１）過ヨウ素酸を添加しなかった
こと以外は実施例１と同様にして試験した。密度は２．
０７ g/cm2、グリーン強度は１２．２Kg/cm2で、密度、
強度とも低かった。(Comparative Example 1) A test was conducted in the same manner as in Example 1 except that periodic acid was not added. The density is 2.
07 g / cm 2 , green strength 12.2 kg / cm 2 , density,
The strength was low.
【００２７】（比較例２）平均分子量２０００のポリエ
チレングリコールを使用しなかった以外は実施例１と同
様にして、試験した。密度は２．１２ g/cm2、グリーン
強度は１９．７Kg/cm2で、成形密度、強度とも弱かっ
た。Comparative Example 2 A test was conducted in the same manner as in Example 1 except that polyethylene glycol having an average molecular weight of 2,000 was not used. The density was 2.12 g / cm 2 , the green strength was 19.7 kg / cm 2 , and both the molding density and the strength were weak.
【００２８】（比較例３）グリセリンを使用しなかった
以外は実施例１と同様にして試験した。密度は１．９８
g/cm2、グリーン強度は１７．７Kg／cm2 で、成形密
度、強度とも弱かった。Comparative Example 3 A test was conducted in the same manner as in Example 1 except that glycerin was not used. The density is 1.98
g / cm 2 , green strength was 17.7 kg / cm 2 , and both the molding density and strength were weak.
【００２９】[0029]
【発明の効果】以上の説明から明らかなように、所望の
低重合度のＰＶＡを工業的に安価に製造することができ
ることにより、良好なセラミックス用バインダーを安価
に提供するができるとともに、しかもセラミックス粉体
の造粒、成形に用いることにより、粒子径が均一な造粒
物が得られ、しかも流動性が良く、プレス成形した際
に、造粒粒子のつぶれ性が良く、低いプレス圧で充填密
度を向上させることができるセラミックス用バインダー
を提供することができる。As is apparent from the above description, it is possible to industrially and inexpensively produce a PVA having a desired low degree of polymerization, so that a good binder for ceramics can be provided at a low cost. By using for granulation and molding of powder, a granulated product with uniform particle size can be obtained, and it has good fluidity, and when pressed, has good crushing properties of granulated particles and is filled with low press pressure A binder for ceramics capable of improving the density can be provided.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4J002 BE021 CH022 EC046 EC056 ED026 EF037 EN106 EP016 ET016 FD026 GT00 4J040 BA182 DD021 HB10 HB11 HB15 HC09 HC11 HC19 KA31 LA01 MA04 NA19 QA01 4J100 AD02P CA01 CA04 CA31 HA51 HB08 HB33 HB34 HB38 HD01 JA05 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4J002 BE021 CH022 EC046 EC056 ED026 EF037 EN106 EP016 ET016 FD026 GT00 4J040 BA182 DD021 HB10 HB11 HB15 HC09 HC11 HC19 KA31 LA01 MA04 NA19 QA01 4J100 AD02P CA01 CA04 HB38H01B
Claims (1)
リビニルアルコールに可塑剤と水溶性または水分散性ワ
ックスとを配合してなることを特徴とするセラミックス
用バインダー。1. A binder for ceramics, comprising a plasticizer and a water-soluble or water-dispersible wax mixed with polyvinyl alcohol having a low degree of polymerization by main chain cleavage with an oxidizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10270474A JP2000086992A (en) | 1998-09-09 | 1998-09-09 | Binder for ceramic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10270474A JP2000086992A (en) | 1998-09-09 | 1998-09-09 | Binder for ceramic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000086992A true JP2000086992A (en) | 2000-03-28 |
Family
ID=17486821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10270474A Pending JP2000086992A (en) | 1998-09-09 | 1998-09-09 | Binder for ceramic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000086992A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7372438B2 (en) | 2003-11-19 | 2008-05-13 | Samsung Sdi Co., Ltd. | Electroluminescent display |
| WO2019156006A1 (en) | 2018-02-08 | 2019-08-15 | デンカ株式会社 | Modified vinyl alcohol polymer and dispersion stabilizer for suspension polymerization |
| JP2020070372A (en) * | 2018-10-31 | 2020-05-07 | 三菱ケミカル株式会社 | Film coating composition, solid preparation and method for producing solid preparation |
-
1998
- 1998-09-09 JP JP10270474A patent/JP2000086992A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7372438B2 (en) | 2003-11-19 | 2008-05-13 | Samsung Sdi Co., Ltd. | Electroluminescent display |
| WO2019156006A1 (en) | 2018-02-08 | 2019-08-15 | デンカ株式会社 | Modified vinyl alcohol polymer and dispersion stabilizer for suspension polymerization |
| JP2020070372A (en) * | 2018-10-31 | 2020-05-07 | 三菱ケミカル株式会社 | Film coating composition, solid preparation and method for producing solid preparation |
| JP7119913B2 (en) | 2018-10-31 | 2022-08-17 | 三菱ケミカル株式会社 | Film coating composition, solid formulation and method for producing solid formulation |
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