JPH0913071A - Lubricating mold release agent - Google Patents
Lubricating mold release agentInfo
- Publication number
- JPH0913071A JPH0913071A JP16208195A JP16208195A JPH0913071A JP H0913071 A JPH0913071 A JP H0913071A JP 16208195 A JP16208195 A JP 16208195A JP 16208195 A JP16208195 A JP 16208195A JP H0913071 A JPH0913071 A JP H0913071A
- Authority
- JP
- Japan
- Prior art keywords
- release agent
- mold
- powder
- weight
- lubricating
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】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や熱間押出加
工の際に用いられる潤滑離型剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a lubricant release agent used in hot rolling or hot extrusion of iron, aluminum or their alloys.
【０００２】[0002]
【従来の技術】従来、上記の潤滑離型剤としては、黒鉛
粉末が分散された油性もしくは水性の有機エマルジョン
系（有機バインダ系）のものが使用されている。しか
し、この従来の有機エマルジョン系の潤滑離型剤の場
合、次の（１）〜（３）ような問題がある。 （１）黒鉛はアルミニウムあるいはその合金と反応し易
く、このため、潤滑剤もしくは離型剤として熱間で使用
した場合、アルミニウムあるいはその合金の表面にＡｌ
4 Ｃ3 等の化合物が生成され、押出成型や鋳込成型され
たアルミニウム製品に欠陥が生じるおそれがある。 （２）有機バインダは２００℃以上に加熱されると分解
して多量のガスを発生し、このガスが未凝固のアルミニ
ウム中を通過すると、アルミニウムダイキャスト製品の
表面に多孔質の欠陥が生成するおそれがある。 （３）上記した有機バインダが分解して発生した多量の
ガスやすすは作業環境を極端に悪化させる場合がある。2. Description of the Related Art Conventionally, as the lubricant release agent, an oily or aqueous organic emulsion (organic binder) in which graphite powder is dispersed is used. However, this conventional organic emulsion-based lubricant release agent has the following problems (1) to (3). (1) Graphite easily reacts with aluminum or its alloy. Therefore, when hot used as a lubricant or a mold release agent, Al is deposited on the surface of aluminum or its alloy.
Compounds such as 4 C 3 may be generated, which may cause defects in extrusion-molded or cast-molded aluminum products. (2) When the organic binder is heated to 200 ° C. or higher, it decomposes to generate a large amount of gas, and when this gas passes through unsolidified aluminum, porous defects are generated on the surface of the aluminum die-cast product. There is a risk. (3) A large amount of gas or soot generated by the decomposition of the above organic binder may extremely deteriorate the working environment.
【０００３】上記問題点を解決する潤滑離型剤として、
窒化硼素（ＢＮ）粉末を主体とする高温金型離型剤が提
案されている（特開昭５５−２９５０６号公報参照）。
ＢＮ粉末を主体とする潤滑離型剤により、前述の（１）
〜（３）に示した問題点はかなり解決できる。しかし、
この潤滑離型剤を、１５０℃以上の高温に加熱された被
塗布表面に塗布した場合、均一で良好な塗膜が必ずしも
形成されない。また、１５０℃未満の被塗布表面に塗布
して良好な塗膜が形成されたとしても、被塗布表面を３
００℃以上に加熱した場合、被塗布表面から塗膜が剥離
してしまうことが多いという問題がある。As a lubricant release agent for solving the above problems,
A high-temperature mold release agent mainly composed of boron nitride (BN) powder has been proposed (see Japanese Patent Laid-Open No. 55-29506).
With the lubricant release agent mainly composed of BN powder, the above-mentioned (1)
The problems shown in (3) can be solved considerably. But,
When this lubricating release agent is applied to the surface to be coated which has been heated to a high temperature of 150 ° C. or higher, a uniform and good coating film is not always formed. In addition, even if a good coating film is formed by coating on a surface to be coated at a temperature of less than 150 ° C.
When heated to 00 ° C. or higher, there is a problem that the coating film often peels from the surface to be coated.
【０００４】上記問題点を解決し、金型が通常使用され
る温度範囲内の温度に加熱された材料表面に塗布して
も、均一な塗膜を形成できる潤滑離型剤として、特開昭
６３−２７０７９８号公報は、ＢＮ粉末に水溶性リン酸
塩およびコロイド状シリカを加えた水性潤滑離型剤が開
示されている。As a lubricant release agent which solves the above problems and can form a uniform coating film even when applied to the surface of a material heated to a temperature within a temperature range where a mold is usually used, it is disclosed in Japanese Patent Laid-Open No. 63-270798 discloses an aqueous lubricant release agent obtained by adding a water-soluble phosphate and colloidal silica to BN powder.
【０００５】[0005]
【発明が解決しようとする課題】しかし、この水性潤滑
離型剤はバインダとして水溶性リン酸塩を含むため、金
型を腐食させやすいという問題がある。このため、長期
間の使用により金型の腐食変形を招いてアルミダイカス
ト製品に欠陥を生じさせたり、金型の寿命を極端に短く
したりするという問題がある。However, since this water-based lubricant release agent contains a water-soluble phosphate as a binder, there is a problem that the mold is easily corroded. For this reason, there is a problem in that the die is corroded and deformed due to long-term use to cause defects in the aluminum die cast product, and the life of the die is extremely shortened.
【０００６】また、上記の水性潤滑離型剤を静置してお
くとＢＮ粉末が沈降してしまうので、ＢＮ粉末を沈降さ
せないために水性潤滑離型剤を時々攪拌する必要があ
る。また、上記の水性潤滑離型剤を、スプレーガン等を
使って長時間連続して使用した場合、スプレーガンが詰
まったり、スプレーの初期と終期とで膜厚が変動したり
するという問題がある。Further, if the above-mentioned water-based lubricant release agent is allowed to stand, the BN powder will settle. Therefore, it is necessary to occasionally stir the water-based lubricant release agent in order to prevent the BN powder from settling. Further, when the above-mentioned water-based lubricant release agent is continuously used for a long time using a spray gun or the like, there is a problem that the spray gun is clogged or the film thickness varies between the initial stage and the final stage of spraying. .
【０００７】本発明は、上記事情に鑑み、金型が通常使
用される温度範囲内の温度に加熱された材料表面に長時
間連続して塗布しても均一な塗膜が形成され、また、作
業環境の汚染もなく、しかも金型等の被塗布金属表面を
腐食させない潤滑離型剤を提供することを目的とする。In view of the above situation, the present invention forms a uniform coating film even when continuously applied for a long time on the surface of a material heated to a temperature within a temperature range where a mold is normally used, and It is an object of the present invention to provide a lubricating mold release agent which does not pollute the working environment and does not corrode the surface of a metal to be coated such as a mold.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、ＢＮ粉末
と各種無機バインダとを含有する組成物を調合し、種々
の温度の被塗布金属面に塗布し、形成された塗膜の性
状、潤滑性等を調べ、さらに、被塗布金属面の腐食の有
無を調べた。この結果、ＢＮ粉末およびコロイド状シリ
カを含有し、水素イオン指数ｐＨが７以上に調整された
水分散組成物を用いると、被塗布金属面の腐食を起こさ
ず、均一な塗膜が形成でき、潤滑性、離型性も優れるこ
とを見いだし、本発明をなすに至った。The inventors of the present invention prepared a composition containing BN powder and various inorganic binders, applied the composition to a metal surface to be coated at various temperatures, and formed the properties of a coating film formed. The lubricity and the like were examined, and further, the presence or absence of corrosion on the metal surface to be coated was examined. As a result, when an aqueous dispersion composition containing BN powder and colloidal silica and having a hydrogen ion exponent pH adjusted to 7 or more was used, a uniform coating film could be formed without causing corrosion on the metal surface to be coated, They have found that they have excellent lubricity and releasability, and have completed the present invention.
【０００９】具体的には、本発明の潤滑離型剤は、 （１）０．５μｍ以上２０μｍ以下の範囲内の平均粒径
を有し、かつ、１重量％以上４０重量％以下の範囲内の
濃度を有する窒化硼素粉末 （２）ＳｉＯ2 で表して０．１重量％以上２０重量％以
下の範囲内の濃度を有するコロイド状シリカを含有し、 （３）残部が水及び分散剤からなり （４）水素イオン指数ｐＨが７以上であること を特徴とするものである。Specifically, the lubricant release agent of the present invention has (1) an average particle size in the range of 0.5 μm or more and 20 μm or less and in the range of 1% by weight or more and 40% by weight or less. A boron nitride powder having a concentration of (2) containing colloidal silica having a concentration in the range of 0.1% by weight to 20% by weight, expressed as SiO 2 , (3) the balance consisting of water and a dispersant (4) The hydrogen ion index pH is 7 or more.
【００１０】本発明の潤滑離型剤は、ＢＮ粉末とコロイ
ド状シリカとを水に分散させたか、あるいは溶解させた
水分散組成物からなるものであり、この潤滑離型剤に
は、少量の分散剤も添加されている。分散剤は、ＢＮ粉
末を一様に水に分散させるために添加するものであり、
その種類は、水分散組成物のｐＨが７以上になるような
ものであればよく、その他は特に限定されない。分散剤
としては、例えばメチルセルロース、ヒドロキシエチル
セルロース、カルボキシメチルセルロース、ポリエチレ
ングリコール、ポリビニルアルコール、ポリカルボン酸
アンモニウム、水ガラス、アンモニア水等が使用でき、
その量は２重量％以下が好適である。硝酸や塩酸等の酸
性度の強い分散剤は水分散組成物のｐＨを７未満にする
ので好ましくない。The lubricating mold release agent of the present invention comprises an aqueous dispersion composition in which BN powder and colloidal silica are dispersed or dissolved in water. A dispersant has also been added. The dispersant is added to uniformly disperse the BN powder in water,
The kind is not particularly limited as long as the pH of the aqueous dispersion composition is 7 or more. As the dispersant, for example, methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, polyethylene glycol, polyvinyl alcohol, ammonium polycarboxylate, water glass, aqueous ammonia, etc. can be used,
The amount is preferably 2% by weight or less. Dispersants with strong acidity, such as nitric acid and hydrochloric acid, are not preferred because they bring the pH of the aqueous dispersion composition below 7.
【００１１】[0011]
【作用】本発明の潤滑離型剤が潤滑性及び離型性を有す
る理由は、基本成分として配合されたＢＮ粉末の性質に
よるものである。ＢＮは、黒鉛に類似した層状化合物で
あり、しかも、化学的にはＡｌ等に対して安定した性質
を有している。潤滑性は層状化合物の層間の滑りから発
現する。離型性は主としてＡｌ等の金属との反応性に大
きく関係する。黒鉛に比べＢＮの方が溶融Ａｌとの反応
性が低く、このため、黒鉛粉末を用いるよりもＢＮ粉末
を用いた方が離型性に優れる。The reason why the lubricating mold release agent of the present invention has lubricity and mold releasability is due to the properties of the BN powder compounded as the basic component. BN is a layered compound similar to graphite and has a chemically stable property with respect to Al and the like. Lubricity develops from slippage between layers of the layered compound. The releasability is largely related to the reactivity with a metal such as Al. BN has a lower reactivity with molten Al than graphite, and therefore, using BN powder is superior in releasability to graphite powder.
【００１２】ＢＮ粉末の平均粒径を０．５μｍ以上２０
μｍ以下の範囲内に限定する理由は、平均粒径が０．５
μｍ未満であると、ＢＮ粉末の潤滑性の発現が困難であ
り、一方、２０μｍを超えると分散剤を添加してもＢＮ
粉末を水中に均一に分散させることが困難になるからで
ある。ＢＮ粉末の濃度を１重量％以上４０重量％以下に
限定する理由は、ＢＮ粉末の濃度が１重量％未満であっ
ても、４０重量％を超えても、被塗布面に潤滑離型剤を
均一に塗布することが困難となり離型性が不良となるか
らである。The average particle size of the BN powder is 0.5 μm or more 20
The reason for limiting the thickness within the range of μm or less is that the average particle size is 0.5.
If it is less than μm, it is difficult to develop the lubricity of the BN powder.
This is because it becomes difficult to uniformly disperse the powder in water. The reason why the concentration of the BN powder is limited to 1% by weight or more and 40% by weight or less is that the lubricating release agent is applied to the surface to be coated whether the concentration of the BN powder is less than 1% by weight or more than 40% by weight. This is because it becomes difficult to apply it uniformly and the releasability becomes poor.
【００１３】本発明においては、ＢＮ粉末のバインダと
してコロイド状シリカを配合する。このコロイド状シリ
カとは、ＳｉＯ2 またはその水和物のコロイドをいい、
ＳｉＯ2 の粒径は、１ｎｍ以上１０００ｎｍ以下の範囲
内のものが一般的である。本発明の潤滑離型剤が被塗布
面上で乾燥するとＳｉＯ2 被膜が形成され、コロイド状
シリカは、潤滑性を有するＢＮ粉末を塗膜（ＳｉＯ2 被
膜）中に均一に安定して保持するバインダとして機能
し、高温下でもその機能を安定に維持する。In the present invention, colloidal silica is blended as a binder for BN powder. The colloidal silica is a colloid of SiO 2 or its hydrate,
The particle size of SiO 2 is generally in the range of 1 nm to 1000 nm. When the lubricant release agent of the present invention is dried on the surface to be coated, a SiO 2 film is formed, and the colloidal silica uniformly and stably holds the BN powder having lubricity in the film (SiO 2 film). It functions as a binder and maintains its function stably even at high temperatures.
【００１４】本発明では、コロイド状シリカを０．１重
量％以上２０重量％以下の範囲内で配合する。配合量が
０．１重量％未満の場合は上記の機能を奏さない。一
方、２０重量％を超えた場合は、ＳｉＯ2 の多い硬質塗
膜となって潤滑性のある塗膜が形成できない。本発明で
は、さらに、潤滑離型剤の水素イオン指数ｐＨを７以上
に限定する。従来はＢＮ粉末のバインダとしてリン酸塩
が用いられており、この場合は、潤滑離型剤のｐＨが７
未満である。ｐＨが７未満であると、被塗布面の金属が
腐食し、金型が変形したり金型の寿命が短くなったりす
るという悪影響を引き起こす。また、ｐＨが７未満であ
ると、コロイド状シリカが凝集し易くなり、静置してお
くとＢＮ粉末が沈降してしまう。したがって、本発明の
潤滑離型剤では、リン酸塩を配合せずに、ｐＨが７以上
になるようにした。In the present invention, colloidal silica is blended in the range of 0.1% by weight to 20% by weight. If the blending amount is less than 0.1% by weight, the above function is not exhibited. On the other hand, if it exceeds 20% by weight, a hard coating film containing a large amount of SiO 2 cannot be formed to form a lubricating coating film. In the present invention, the hydrogen ion exponent pH of the lubricant release agent is further limited to 7 or more. Conventionally, phosphate is used as a binder of BN powder, and in this case, the pH of the lubricant release agent is 7
Is less than. When the pH is less than 7, the metal on the surface to be coated is corroded, which causes adverse effects such as deformation of the mold and shortening of the life of the mold. Further, if the pH is less than 7, the colloidal silica easily aggregates, and if left to stand, the BN powder will settle. Therefore, in the lubricant release agent of the present invention, the pH was adjusted to 7 or more without adding the phosphate.
【００１５】[0015]
【実施例】以下、本発明の潤滑離型剤の実施例を比較例
と共に説明する。平均粒径が４．５μｍのＢＮ粉末を用
い、表１に示したＢＮ粉末−コロイド状シリカ系の各種
組成の水分散組成物を調合して、実施例と比較例の潤滑
離型剤を製造した。各潤滑離型剤を鋼板上に塗布して塗
膜の外観と潤滑性および離型性を評価した。また、被塗
布鋼板表面の腐食の有無についても調べた。それらの結
果を表１に示す。EXAMPLES Examples of the lubricant release agent of the present invention will be described below together with comparative examples. Using BN powder having an average particle diameter of 4.5 μm, various BN powder-colloidal silica-based water-dispersed compositions shown in Table 1 were prepared to produce lubricating release agents of Examples and Comparative Examples. did. Each lubricant release agent was applied on a steel plate to evaluate the appearance, lubricity and releasability of the coating film. Also, the presence or absence of corrosion on the surface of the coated steel sheet was examined. Table 1 shows the results.
【００１６】表１から明らかなように、本発明の水分散
組成物からなる潤滑離型剤は使い易く、均一な塗膜が形
成され、塗膜の潤滑性、離型性にも優れ、さらには被塗
布金属面に腐食を引き起こすこともない。As is clear from Table 1, the lubricating mold release agent comprising the water-dispersed composition of the present invention is easy to use, a uniform coating film is formed, and the coating film has excellent lubricity and releasing property. Does not cause corrosion on the coated metal surface.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】以上説明したように本発明の潤滑離型剤
では、濃度などが限定された窒化硼素粉末やコロイド状
シリカを含有し、しかも、ｐＨ値も限定されているの
で、金型が通常使用される温度範囲内の任意の温度の材
料表面に長時間連続して塗布しても均一な塗膜が形成さ
れ、しかも金型等の被塗布金属表面を腐食させない。ま
た、バインダとしてコロイド状シリカを使用しているの
で、作業環境の汚染もない。As described above, the lubricant mold release agent of the present invention contains boron nitride powder or colloidal silica whose concentration is limited and has a limited pH value. A uniform coating film is formed even if it is continuously applied to a material surface at an arbitrary temperature within the temperature range normally used for a long time, and the surface of a metal to be coated such as a mold is not corroded. Further, since colloidal silica is used as the binder, there is no contamination of the working environment.
───────────────────────────────────────────────────── 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 Ｃ１０Ｍ 103:00） Ｃ１０Ｎ 20:06 30:12 40:24 40:36 50:08 (72)発明者 笠原 俊二 倉敷市水島川崎通１丁目１番地 水島合金 鉄株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location C10M 103: 00) C10N 20:06 30:12 40:24 40:36 50:08 (72) Invention Shunji Kasahara 1-1, Mizushima Kawasaki-dori, Kurashiki City Mizushima Alloy Iron Co., Ltd.
Claims (1)
平均粒径を有し、かつ、１重量％以上４０重量％以下の
範囲内の濃度を有する窒化硼素粉末と、 ＳｉＯ2 で表して０．１重量％以上２０重量％以下の範
囲内の濃度を有するコロイド状シリカとを含有し、 残部が水及び分散剤からなり、水素イオン指数ｐＨが７
以上であることを特徴とする潤滑離型剤。1. A boron nitride powder having an average particle size in the range of 0.5 μm or more and 20 μm or less and a concentration in the range of 1% by weight or more and 40% by weight or less, and 0 represented by SiO 2. And colloidal silica having a concentration in the range of 1% by weight or more and 20% by weight or less, the balance being water and a dispersant, and having a hydrogen ion exponent pH of 7
The lubricant release agent having the above characteristics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16208195A JPH0913071A (en) | 1995-06-28 | 1995-06-28 | Lubricating mold release agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16208195A JPH0913071A (en) | 1995-06-28 | 1995-06-28 | Lubricating mold release agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0913071A true JPH0913071A (en) | 1997-01-14 |
Family
ID=15747731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16208195A Withdrawn JPH0913071A (en) | 1995-06-28 | 1995-06-28 | Lubricating mold release agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0913071A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030021621A (en) * | 2001-09-07 | 2003-03-15 | 우민무역주식회사 | Stickiness preventing agent for sticky adhesive and stickiness preventing composition comprising the stickiness preventing agent |
| DE102014209971A1 (en) | 2014-05-26 | 2015-11-26 | Dieter Kutzner | Repairing compound for ceramic components |
| JP2019500221A (en) * | 2015-12-29 | 2019-01-10 | モメンティブ パフォーマンス マテリアルズ インコーポレイテッド | Boron nitride coatings for metal processing and methods of use thereof |
| KR20230014140A (en) * | 2021-07-20 | 2023-01-30 | 동국제강주식회사 | Releasing agent for a thin plate, Releasing agent application apparatus for slab and a method for applying releasing agent for slab using the same |
-
1995
- 1995-06-28 JP JP16208195A patent/JPH0913071A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030021621A (en) * | 2001-09-07 | 2003-03-15 | 우민무역주식회사 | Stickiness preventing agent for sticky adhesive and stickiness preventing composition comprising the stickiness preventing agent |
| DE102014209971A1 (en) | 2014-05-26 | 2015-11-26 | Dieter Kutzner | Repairing compound for ceramic components |
| JP2019500221A (en) * | 2015-12-29 | 2019-01-10 | モメンティブ パフォーマンス マテリアルズ インコーポレイテッド | Boron nitride coatings for metal processing and methods of use thereof |
| KR20230014140A (en) * | 2021-07-20 | 2023-01-30 | 동국제강주식회사 | Releasing agent for a thin plate, Releasing agent application apparatus for slab and a method for applying releasing agent for slab using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020903 |