JPH0791551B2 - High temperature lubricant / release agent - Google Patents
High temperature lubricant / release agentInfo
- Publication number
- JPH0791551B2 JPH0791551B2 JP26160188A JP26160188A JPH0791551B2 JP H0791551 B2 JPH0791551 B2 JP H0791551B2 JP 26160188 A JP26160188 A JP 26160188A JP 26160188 A JP26160188 A JP 26160188A JP H0791551 B2 JPH0791551 B2 JP H0791551B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- colloidal alumina
- weight
- solid content
- release agent
- 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 - Lifetime
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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、窒化硼素（以下BNと記す）粉末を用いた、固
体潤滑あるいは離型剤の用途に供する、水あるいは水−
アルコール系分散組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention uses a boron nitride (hereinafter referred to as BN) powder to provide a solid lubricant or a mold release agent, and water or water-
The present invention relates to an alcohol-based dispersion composition.
本発明は、主として、鉄、アルミニウム、あるいは、そ
れらの合金の熱間圧延、押出加工時などの熱間加工時等
に好適に用いられる、高温用潤滑・離型剤に関するもの
で、従来、この種の潤滑・離型剤としては、黒鉛粉末を
分散させた油性もしくは水性の有機エマルジョン型のも
のが使用されている。しかし、従来型の黒鉛粉末−有機
バインダ系の潤滑・離型剤の場合、次のような多くの欠
点を有していた。すなわち、 （１） 熱間加工時に材料と黒鉛とが反応して表面に浸
炭層が生成し、製品表面あるいは内部の欠陥生成の原因
となる。The present invention mainly relates to a high temperature lubricating / releasing agent, which is preferably used for hot rolling of iron, aluminum or their alloys, hot working such as extrusion. As a kind of lubricant / release agent, an oily or aqueous organic emulsion type in which graphite powder is dispersed is used. However, the conventional graphite powder-organic binder lubricant / release agent has many drawbacks as follows. That is, (1) during hot working, the material reacts with graphite to form a carburized layer on the surface, which causes defects on the product surface or inside.
（２） 有機バインダーは、200℃以上に熱した場合分
解してガスを発生させ、アルミニウム合金などの比較的
軟かい金属では表面に多孔質の欠陥部分を生起させる。(2) The organic binder decomposes when heated to 200 ° C. or higher to generate a gas, and a relatively soft metal such as an aluminum alloy causes a porous defect portion on the surface.
（３） 黒色の黒鉛粉末および（２）で述べた多量のガ
ス発生は、作業環境を極端に悪化させる。(3) The black graphite powder and the large amount of gas generation described in (2) extremely deteriorate the working environment.
上記問題点を解決するために特開昭55−29506号公報に
開示されるように、六方晶窒化硼素（以下、ｈ−BNと記
す）粉末を主体とする高温金型離型剤が提案されてい
る。ｈ−BNは黒鉛と同様な層状構造を有し、ｈ−BN結晶
粒の層間の滑りにより潤滑性が発現する。また、ｈ−BN
は黒鉛と比較して耐酸化性に優れており、高温まで比較
的に安定に存在でき、黒鉛に代わる高温潤滑・離型剤と
しての用途拡大が期待されていた。In order to solve the above problems, a high temperature mold release agent mainly composed of hexagonal boron nitride (hereinafter referred to as h-BN) powder has been proposed as disclosed in Japanese Patent Laid-Open No. 55-29506. ing. h-BN has a layered structure similar to that of graphite, and lubricity is exhibited by the sliding of h-BN crystal grains between layers. Also, h-BN
Has excellent oxidation resistance compared to graphite, and can exist relatively stably at high temperatures, and it was expected that its application as a high-temperature lubricant / release agent to replace graphite would be expanded.
ところが、実際に金属の熱間加工に使用した場合、ｈ−
BN系の潤滑・離型剤は熱間の潤滑性の発現に対して、期
待される効果が出ないのが常であった。この原因はｈ−
BN粉末にあるのではなく、ｈ−BN粉末を分散させる媒質
に問題があると考えられる。すなわち、ｈ−BN粉末の潤
滑性を最大限に発現させるために最適な媒質の選択・検
討がさらに必要であった。However, when actually used for hot working of metal, h-
BN-based lubricants / release agents have not always had the expected effect on the development of hot lubricity. This cause is h-
It is considered that there is a problem in the medium in which the h-BN powder is dispersed, not in the BN powder. That is, it was necessary to further select and study the optimum medium in order to maximize the lubricity of the h-BN powder.
本発明の目的は、従来の黒鉛−有機バインダー系の潤滑
・離型系における前述の問題点を解決し、かつ、従来の
ｈ−BN粉末を主体とする潤滑・離型剤の高温下での潤滑
機能を画期的に高めた、ｈ−BN粉末系高温樹脂・離型剤
を提供することにある。An object of the present invention is to solve the above-mentioned problems in a conventional graphite-organic binder-based lubricating / releasing system, and to prevent the conventional h-BN powder-based lubricating / releasing agent from operating at high temperatures. It is to provide an h-BN powder type high temperature resin / mold release agent having a remarkably improved lubricating function.
本発明は上記課題を解決するために、六方晶窒化硼素粉
末の含有量が１〜50重量％、コロイド状アルミナの含有
量が固形分（Al2O3、以下同様）として0.5〜15重量％、
六方晶窒化硼素粉末とコロイド状アルミナとの混合比が
六方晶窒化硼素／コロイド状アルミナ（固形分）の重量
比で表わして0.1〜５で、残部が水系分散剤である高温
潤滑・離型剤、および、この高温潤滑・離型剤にさら
に、六方晶窒化硼素粉末とコロイド状アルミナ（固形
分）の合計量に対して２〜30重量％の、有機系または無
機系のバインダを配合した高温潤滑・離型剤を提供もす
るのである。In order to solve the above problems, the present invention has a hexagonal boron nitride powder content of 1 to 50% by weight and a colloidal alumina content of 0.5 to 15% by weight as a solid content (Al 2 O 3 , hereinafter the same). ,
Mixing ratio of hexagonal boron nitride powder and colloidal alumina is 0.1 to 5 expressed as a weight ratio of hexagonal boron nitride / colloidal alumina (solid content), and the balance is a water-based dispersant, high-temperature lubricating / releasing agent. , And a high-temperature lubricant / release agent further mixed with an organic or inorganic binder in an amount of 2 to 30% by weight based on the total amount of hexagonal boron nitride powder and colloidal alumina (solid content). It also provides a lubricant / release agent.
本発明者らは、ｈ−BN粉末と各種の無機物質からなる組
成物を調合し熱間での潤滑性を鋭意評価した結果、主と
してｈ−BN粉末とコロイド状アルミナとから、画期的に
熱間での潤滑性に優れた組成物が得られることを見出
し、本発明を完成した。The inventors of the present invention have prepared a composition comprising h-BN powder and various inorganic substances and have diligently evaluated the lubricity during hot work. As a result, epoch-making mainly from h-BN powder and colloidal alumina. The inventors have found that a composition excellent in hot lubricity can be obtained and completed the present invention.
以下、本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
本発明の組成物が潤滑性および離型性機能を有するの
は、基本成分として配合するｈ−BN粉末の性質によるも
のである。The fact that the composition of the present invention has a lubricating property and a releasing property is due to the properties of the h-BN powder blended as the basic component.
本発明に用いられるｈ−BN粉末とコロイド状アルミナの
性質は、純度、粒度など特に限定されず、95％前後の純
度で１〜10μｍの粒度のｈ−BN粉末が好適に用いられ
る。組成物中のｈ−BN粉末の濃度は１〜50重量％の範囲
内に限定されるが、この範囲内に限定する理由は、１％
未満では潤滑・離型機能を発現するには不足し、50重量
％を越えると潤滑・離型機能は十分であるが、均一な分
散液の調整が難しく、また、潤滑・離型剤としてはスプ
レーガン、はけ塗り等で塗布する際に、粘稠過ぎて塗布
するのが困難となるからである。The properties of the h-BN powder and colloidal alumina used in the present invention are not particularly limited in terms of purity and particle size, and h-BN powder having a particle size of 1 to 10 μm with a purity of around 95% is preferably used. The concentration of the h-BN powder in the composition is limited within the range of 1 to 50% by weight, and the reason for limiting within this range is 1%.
If it is less than 50% by weight, the lubricating and releasing functions are insufficient. If it exceeds 50% by weight, the lubricating and releasing functions are sufficient, but it is difficult to prepare a uniform dispersion liquid. This is because when it is applied with a spray gun, brush coating, etc., it is too viscous and difficult to apply.
本発明では、コロイド状アルミナを配合する。コロイド
状アルミナを配合する理由は、実験結果に基づいて後述
するように、ｎ−BN粉末とコロイド状アルミナとを配合
することにより、ｈ−BN粉末のみの場合と比べて潤滑性
が各段に向上するからである。本発明において好適に用
いられるコロイド状アルミナについても特に限定され
ず、例えば、市販されている日産化学工業（株）製のコ
ロイド状アルミナである。アルミナゾル−100、アルミ
ナゾル−200などが好適に使用される。その配合量は、
固形分として潤滑・離型剤に対して0.5〜15重量％で、
この範囲内に限定する理由は、0.5％重量未満ではコロ
イド状アルミナの効果が出ず、15重量％を越えるとｈ−
BN粉末の時にも述べたように、組成物が粘稠になり過ぎ
て塗布するのが困難となるからである。In the present invention, colloidal alumina is blended. The reason why the colloidal alumina is blended is that, as will be described later based on the experimental results, by blending the n-BN powder and the colloidal alumina, the lubricity is much higher than that of the h-BN powder alone. Because it improves. The colloidal alumina preferably used in the present invention is not particularly limited, and examples thereof include commercially available colloidal alumina manufactured by Nissan Chemical Industries, Ltd. Alumina sol-100, alumina sol-200 and the like are preferably used. The blending amount is
0.5 to 15% by weight of the lubricant / release agent as solid content,
The reason for limiting the content within this range is that the effect of colloidal alumina is not exerted at less than 0.5% by weight, and h-
This is because the composition becomes too viscous and difficult to apply, as described in the case of BN powder.
本発明においては、上記のｈ−BN粉末とコロイド状アル
ミナを、水または水−アルコール系分散剤に分散させる
が、特に、ｈ−BN粉末とコロイド状アルミナの混合比の
最適化が重要であり、ｈ−BN粉末／コロイド状アルミナ
（固形分）の重量比で表わして0.1〜５の範囲内が潤滑
性が良好である。この範囲内に限定される理由は、以下
の実験結果に基づくものである。In the present invention, the above-mentioned h-BN powder and colloidal alumina are dispersed in water or a water-alcohol dispersant, and it is particularly important to optimize the mixing ratio of the h-BN powder and colloidal alumina. , H-BN powder / colloidal alumina (solid content), the lubricity is good within the range of 0.1 to 5. The reason for being limited within this range is based on the following experimental results.
平均粒径10μｍのｈ−BN粉末と、Al2O3としての固形分
の含有量が10重量％のコロイド状アルミナとを、ｈ−BN
粉末と固形分の合成含有量が10重量％となるように、種
々のｈ−BN粉末／コロイド状アルミナ（固形分）の重量
比の水分散組成物を少量に分散剤を配合して調整し、普
通鋼に100μｍの膜厚となるように塗布して750℃の熱間
での加工の際の変形挙動から摩擦係数を求めた。第１図
に、ｈ−BN粉末のコロイド状アルミナ（固形分）との合
計量に対するｈ−BN粉末含有量と摩擦係数（普通鋼のリ
ング圧縮試験法）との関係を示す。第１図から明らかな
ように、ｈ−BN粉末含有量が９〜84重量％、すなわちｈ
−BN粉末／コロイド状アルミナ（固形分）重量比が0.1
〜５の範囲内において、摩擦係数が0.1以下になってい
ることがわかる。本発明においてｈ−BN粉末／コロイド
状アルミナ（固形分）重量比を0.1〜５の範囲内に限定
する理由は以上の実験結果によるものである。H-BN powder having an average particle size of 10 μm and colloidal alumina having a solid content of 10% by weight as Al 2 O 3 was added to h-BN powder.
A water-dispersed composition having various weight ratios of h-BN powder / colloidal alumina (solid content) was prepared by blending a small amount of a dispersant so that the synthetic content of the powder and the solid content was 10% by weight. The coefficient of friction was determined from the deformation behavior during hot working at 750 ° C after coating on ordinary steel to a film thickness of 100 μm. FIG. 1 shows the relationship between the h-BN powder content and the friction coefficient (ring compression test method for ordinary steel) with respect to the total amount of h-BN powder and colloidal alumina (solid content). As is clear from FIG. 1, the h-BN powder content is 9 to 84% by weight, that is, h
-BN powder / colloidal alumina (solid content) weight ratio 0.1
It can be seen that the coefficient of friction is 0.1 or less in the range of up to 5. The reason why the weight ratio of h-BN powder / colloidal alumina (solid content) in the present invention is limited to the range of 0.1 to 5 is based on the above experimental results.
ｈ−BN粉末とコロイド状アルミナとを混合することによ
り、何故、摩擦係数がｈ−BN粉末のみの場合と比べ大幅
に低下するのかという理由については詳かではないが、
コロイド状アルミナは100Åの直径で長さが1000Å（0.1
μｍ）と非常に微細なベーマイト系の棒状結晶の集合体
の水分散組成物であり、ｈ−BN粉末の混合した場合、ｈ
−BN粉末の平板結晶の間を充填し、ｈ−BNの結晶粒の層
間の滑りを助長するのではないかと推測される。It is not clear why mixing the h-BN powder and the colloidal alumina significantly reduces the friction coefficient as compared with the case where only the h-BN powder is used.
Colloidal alumina has a diameter of 100Å and a length of 1000Å (0.1
μm) and a very fine boehmite-based rod-shaped crystal aggregate, and when h-BN powder is mixed, h
It is speculated that the space between the tabular crystals of —BN powder may be filled to promote the sliding of the h-BN crystal grains between layers.
本発明においては、前記ｈ−BN粉末とコロイド状アルミ
ナとの均一な水または水−アルコール系分散剤による分
散組成物を調整するが、とくに、ｈ−BN粉末を一様に分
散させるために分散剤を添加することが好ましい。本発
明において使用する分散剤は特に限定されず、通常、有
機系の界面活性剤の作用のあるものが好適に使用され
る。In the present invention, a dispersion composition of the h-BN powder and colloidal alumina in a uniform water or water-alcohol dispersant is prepared. In particular, the h-BN powder is dispersed for uniform dispersion. It is preferable to add an agent. The dispersant used in the present invention is not particularly limited, and normally, a dispersant having an action of an organic surfactant is preferably used.
本発明において、水−アルコール系分散剤を用いる理由
は、水にアルコールを混合することにより、スプレー等
により塗布した際の被膜の乾燥速度をコントロールでき
るからであり、各種金属の加工時の実際の適用状況に合
わせて、水とアルコールの混合比が決定される。本発明
において使用されるアルコールについても特に限定され
ないが、コスト等を考えてメチルアルコール、エチルア
ルコールが好適である。In the present invention, the reason for using the water-alcohol dispersant is that by mixing alcohol with water, it is possible to control the drying speed of the coating film when applied by spraying, etc. The mixing ratio of water and alcohol is determined according to the application situation. The alcohol used in the present invention is also not particularly limited, but methyl alcohol and ethyl alcohol are preferable in consideration of cost and the like.
また、本発明においてはｈ−BN粉末とコロイド状アルミ
ナに加えて、さらに好適には有機系または無機系のバイ
ンダを配合する。配合する目的は、スプレー等により塗
布して形成した被膜を乾燥あるいは熱処理した際に、被
膜中にｈ−BN粉末などを安定して保持するためであり、
有機系バインダとしては、水またはアルコールと相溶性
のポリビニルアルコール、カルボキシルメチルセルロー
ズなどが好適であり、無機系バインダとしては燐酸塩
系、水ガラス系のバインダが好適である。これらのバイ
ンダの添加量は、ｈ−BN粉末とコロイド状アルミナ（固
形分）の合計量に対して２〜30重量％とするが、この範
囲内に限定する理由は、２重量％未満ではバインダの効
果が不十分で、30重量％を越えて配合すると、バインダ
自体の特性のため、摩擦係数に悪影響が出てくるからで
ある。Further, in the present invention, in addition to the h-BN powder and colloidal alumina, more preferably, an organic or inorganic binder is blended. The purpose of blending is to stably hold h-BN powder and the like in the coating when the coating formed by spraying or the like is dried or heat-treated,
As the organic binder, polyvinyl alcohol compatible with water or alcohol, carboxymethyl cellulose and the like are preferable, and as the inorganic binder, phosphate type and water glass type binders are preferable. The addition amount of these binders is 2 to 30% by weight with respect to the total amount of h-BN powder and colloidal alumina (solid content), but the reason for limiting within this range is that the binder is less than 2% by weight. This is because the effect of is not sufficient, and if the content exceeds 30% by weight, the friction coefficient is adversely affected due to the characteristics of the binder itself.
１次粒子の平均粒径が7.0μｍのｈ−BN粉末、固形分含
有量20重量％のコロイド状アルミナ（日産化学工業製ア
ルミナゾル−200）、およびポリカルボン酸系の分散剤
を用い、第１表に示したｈ−BN粉末とコロイド状アルミ
ナと水系分散剤とからなる各種組成の潤滑・離型剤を調
合し、リング形状の普通鋼に100μｍの膜厚となるよう
に塗布し乾燥した後、750℃の熱間にて圧縮加工を施
し、その時の変化量から摩擦係数を求めるというリング
圧縮試験法によって評価した。Using h-BN powder having an average primary particle size of 7.0 μm, colloidal alumina having a solid content of 20% by weight (Alumina sol-200 manufactured by Nissan Chemical Industries, Ltd.), and a polycarboxylic acid-based dispersant, Lubricant / release agent of various compositions consisting of h-BN powder, colloidal alumina and water-based dispersant shown in the table was mixed, applied to ring-shaped plain steel to a thickness of 100 μm, and dried. It was evaluated by the ring compression test method in which compression processing was performed in the heat of 750 ° C and the friction coefficient was obtained from the amount of change at that time.
試験結果を第１表に示す。第１表に示すように本発明に
よれば、摩擦係数の非常に低い高温潤滑・離型剤が得ら
れる。The test results are shown in Table 1. As shown in Table 1, according to the present invention, a high temperature lubricating / releasing agent having a very low friction coefficient can be obtained.
〔発明の効果〕 本発明のｈ−BN粉末とコロイド状アルミナとの水系分散
組成物は、鋼あるいはアルミニウム等の非鉄金属の熱間
加工用の非常に摩擦係数の低い潤滑・離型性の被膜が形
成でき、しかも、作業環境の汚染のない高温潤滑・離型
剤として利用可能である。 [Effects of the Invention] The aqueous dispersion composition of the h-BN powder and colloidal alumina of the present invention is a lubricating / releasing coating with a very low friction coefficient for hot working of nonferrous metals such as steel or aluminum. It can be used as a high-temperature lubricant / release agent that can form a slag and does not pollute the working environment.
第１図は摩擦係数とｈ−BN粉末／コロイド状アルミナ
（固形分）重量比との関係を示す図である。FIG. 1 is a diagram showing the relationship between the friction coefficient and the h-BN powder / colloidal alumina (solid content) weight ratio.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ１０Ｎ 10:06 30:08 40:24 Ａ Ｚ 40:36 50:02 50:08 (72)発明者 香坂 昌三 東京都港区芝浦１丁目１番１号 コスモ石 油株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication part C10N 10:06 30:08 40:24 AZ 40:36 50:02 50:08 (72) Invention Person Shozo Kosaka 1-1-1, Shibaura, Minato-ku, Tokyo Cosmo Ishi Oil Co., Ltd.
Claims (2)
％、 コロイド状アルミナの含有量が固形分として0.5〜15重
量％、 六方晶窒化硼素粉末とコロイド状アルミナとの混合比が
六方晶窒化硼素粉末／コロイド状アルミナ（固形分）の
重量比で表わして0.1〜５、 残部が水系分散剤 であることを特徴とする高温潤滑・離型剤。1. The content of hexagonal boron nitride powder is 1 to 50% by weight, the content of colloidal alumina is 0.5 to 15% by weight as a solid content, and the mixing ratio of hexagonal boron nitride powder and colloidal alumina is Hexagonal boron nitride powder / colloidal alumina (solid content) expressed as a weight ratio of 0.1 to 5, with the balance being an aqueous dispersant.
（固形分）の合計量に対して、２〜30重量％の有機系ま
たは無機系のバインダを配合した請求項１記載の高温潤
滑・離型剤。2. High temperature lubrication / separation according to claim 1, wherein 2 to 30% by weight of an organic or inorganic binder is blended with respect to the total amount of hexagonal boron nitride powder and colloidal alumina (solid content). Mold agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26160188A JPH0791551B2 (en) | 1988-10-19 | 1988-10-19 | High temperature lubricant / release agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26160188A JPH0791551B2 (en) | 1988-10-19 | 1988-10-19 | High temperature lubricant / release agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02110196A JPH02110196A (en) | 1990-04-23 |
| JPH0791551B2 true JPH0791551B2 (en) | 1995-10-04 |
Family
ID=17364170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26160188A Expired - Lifetime JPH0791551B2 (en) | 1988-10-19 | 1988-10-19 | High temperature lubricant / release agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0791551B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5409622A (en) * | 1994-02-07 | 1995-04-25 | Orpac, Inc. | Surface lubricant for objects contacting forms of water and method of preparation |
| DE10084317T1 (en) * | 1999-03-05 | 2002-05-02 | Chuo Hatsumei Inst Co Ltd Toky | Composition of an aqueous mold release lubricant |
| JP2007061842A (en) * | 2005-08-30 | 2007-03-15 | Sumitomo Light Metal Ind Ltd | Aluminum alloy plate for hot blow molding |
| WO2008048705A2 (en) | 2006-03-10 | 2008-04-24 | Goodrich Corporation | Low density lightning strike protection for use in airplanes |
| US20080166563A1 (en) * | 2007-01-04 | 2008-07-10 | Goodrich Corporation | Electrothermal heater made from thermally conducting electrically insulating polymer material |
| KR100908455B1 (en) * | 2008-10-14 | 2009-07-20 | 김태웅 | Non-stick inorganic coating composition and method of preparing the same |
| EP3397792B1 (en) * | 2015-12-29 | 2021-12-29 | Momentive Performance Materials Quartz, Inc. | Boron nitride coatings for metal processing and methods of using the same |
| CN112251276B (en) * | 2020-10-17 | 2023-03-14 | 江西联锴科技有限公司 | Preparation and application methods of water-based inorganic boron nitride release agent |
-
1988
- 1988-10-19 JP JP26160188A patent/JPH0791551B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02110196A (en) | 1990-04-23 |
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