JP3550449B2 - Cold rolling oil additives and cold rolling oils - Google Patents

Cold rolling oil additives and cold rolling oils Download PDF

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Publication number
JP3550449B2
JP3550449B2 JP20558395A JP20558395A JP3550449B2 JP 3550449 B2 JP3550449 B2 JP 3550449B2 JP 20558395 A JP20558395 A JP 20558395A JP 20558395 A JP20558395 A JP 20558395A JP 3550449 B2 JP3550449 B2 JP 3550449B2
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Japan
Prior art keywords
cold rolling
acid
oil
weight
polyester
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JP20558395A
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Japanese (ja)
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JPH0953089A (en
Inventor
久隆 宇都
明 石原
郁夫 森
憲二 細井
忠法 田原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
NIPPON QUAKER CHEMICAL Ltd
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Nippon Steel Corp
NIPPON QUAKER CHEMICAL Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は高速圧延に適した冷間圧延油添加剤およびこの添加剤を含む冷間圧延油に関する。
【0002】
【従来の技術】
ブリキ鋼板は、高圧下、高速度で生産される鋼種であるため、従来より直接式では安価で潤滑性に優れるパーム油等の天然油脂が使用されている。しかし、メッキ目付量の低下や表面美麗さに対する要求度の向上に伴い、わずかな焼付による表面欠陥も許容されなくなってきている。従来から極圧添加剤や油性向上剤の添加、或はエマルジョン粒径の巨大化によるプレートアウトの向上などといった方法が用いられているが、高速圧延時の焼付に対して完全な解決にはいたっておらず、製品によっては、速度制限などによって逃れている。
このような欠点を改良する方法として、ポリブテンやポリデシルメタアクリレート等のポリマーが用いられることもあるが、その効果は満足できるものではない。
【0003】
【発明が解決しようとする課題】
ブリキ圧延等の高速冷間圧延に際し、その焼付を防止することのできる圧延油を提供する。
【0004】
【課題を解決するための手段】
本発明は側鎖に脂肪酸エステル基を持つ重量平均分子量が1万〜30万のポリエステル化合物と有機酸性リン酸エステルのアミン塩を必須成分とする冷間圧延用添加剤に関する。
本発明のポリエステル化合物は側鎖に脂肪酸エステル基を持つ重量平均分子量が1万〜30万の化合物であって、(a)3〜6価のポリオール、(b)脂肪酸および(c)二塩基酸を反応させてなるエステル反応物である。
また、本発明のポリエステル化合物は一般式
【化2】

Figure 0003550449
で表される化合物であってもよい。
また本発明は、ベース油およびこのベース油100重量部に対し上記のポリエステル化合物0.5〜20.0重量部、および上記の有機酸性リン酸エステル0.2〜5.0重量部を含有する冷間圧延油に関する。
【0005】
ポリエステル化合物と有機酸性リン酸エステルのアミン塩は高速高圧下冷間圧延時のロールバイト内において、互いに補完的にロールとストリップとの金属接触を防止し、焼付発生が防止されると共に、圧延荷重も低減される。この効果はポリエステル化合物と有機酸性リン酸エステルのアミン塩の両方が同時に用いられた場合に発揮され、どちらか一方の場合、その効果は十分でない。
ポリエステル化合物は、オレイン酸やダイマー酸などの油性向上剤に比べ分子量が大きく、高温での安定性に優れているため、ロールバイト内の極圧部分にこのポリマーが介在することにより、極圧添加剤の効果が現れるまで焼付を抑え、高速圧延時においても安定な操業を可能とする。増粘効果だけを期待するのであれば、ポリブテンやポリデシルメタアクリレートなども考えられるが、これらは油膜の剪断抵抗が大きいため充分な効果が期待できない。そこで本発明では剪断抵抗を少なくするため側鎖に脂肪酸エステル基を持つポリエステルを用い、その重量平均分子量を1万〜30万とした。
ポリエステル化合物の重量平均分子量が1万未満の場合は焼付防止効果が十分でなく、30万を越える場合はポリエステル化合物はゲル状となる。また側鎖に脂肪酸エステル基がない場合は、重量平均分子量が1万以上になると、圧延油ベース油として用いられるパーム油等に対する溶解性が悪く、使用上問題となる。
【0006】
3〜6価のポリオールとしては、グリセリン、トリメチロールエタン、トリメチロールプロパン、ペンタエリスリトール、ソルビトール、ジグリセリン、ジペンタエリスリトール等が挙げられる。特に好ましいポリオールはトリメチロールエタン、トリメチロールプロパン、ペンタエリスリトール、等のネオペンチル型のポリオールである。二価のポリオールからなるポリエステルでは脂肪酸基が分子の末端にしか結合せず側鎖に脂肪酸エステル基を導入できないため動植物油脂や脂肪酸エステルとの相溶性に劣り、耐加水分解性も良くない。また、一般に6価より大きいポリオールは工業的に入手しにくく、多糖類は熱や酸化劣化を受け易く好ましくない。
【0007】
脂肪酸としては、炭素数12以上22以下の飽和脂肪酸、不飽和脂肪酸、例えばラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、ベヘニン酸、オレイン酸、パルミトレイン酸、エルカ酸、イソステアリン酸等、またはヤシ油、牛脂、パーム油等の動植物油脂から得られる脂肪酸等が例示される。炭素数が12未満の脂肪酸では潤滑性能が劣るし、一方炭素数が22より大きい脂肪酸では生成したポリエステルが常温で固化しやすく、水への分散にも劣るため好ましくない。
【0008】
二塩基酸としては炭素数が4〜12の脂肪族二塩基酸、例えばコハク酸、マレイン酸、アジピン酸、アゼライン酸、セバシン酸、ドデカンジカルボン酸を挙げることができる。炭素数が4より小さいと加水分解を受けやすく、炭素数が12より大きいと流動点が高くなり好ましくない。また脂環式二塩基酸や芳香族二塩基酸では得られるポリエステルのフレキシビリティーがなくなり、潤滑性が低下する。
【0009】
本発明のポリエステルは多価アルコールの水酸基価が多くなるほどゲル化しやすくなる。二塩基酸投入後、ある程度反応が進んだ段階で、一価アルコールを添加すると、ゲル化を抑えることができるため、一価アルコールの併用は好ましい場合がある。
【0010】
有機酸性リン酸エステルのアミン塩は、水酸基含有有機化合物とリン酸とのエステルとアミンとの塩であり、ベース油100重量部に対して0.2〜5.0重量部添加される。水酸基含有有機化合物としては、脂肪族アルコール、脂環族アルコール、脂芳香族アルコール、芳香族ヒドロキシ化合物、多価アルコール、ポリエーテルヒドロキシ化合物、ポリエステルヒドロキシ化合物等が用いられる。リン酸の3つのOH基の少なくともひとつは上記水酸基含有有機化合物とエステルを形成しており、残りの少なくともひとつは、アミン塩を構成する。他のひとつのOHはエステルであってもアミンとの塩であってもよく、あるいは遊離のOH基でもあるいはまたアミン以外のアルカリとの塩であってもよい。エステル残基は有機酸性リン酸エステル1分子当たり1から2個有しているのが好ましく、中和度は残留OH基の40%以上、特に50〜70%が中和され、特にその全てがアミンで中和されているのが好ましい。
【0011】
アミンとしては、芳香族アミンまたは脂肪族アミンが挙げられる。
芳香族アミンとしては、一般式:
Ar−NR−Ar’
(式中、ArおよびAr’はそれぞれ独立して置換基を有していてもよい芳香族基、Rは水素またはアルキル基を示す)で表される化合物であって、好ましいArおよびAr’は少なくとも一方が置換基を有していてもよいフェニル基、他方が置換基を有していてもよいフェニルまたはナフチル基である。置換基としては、炭素数1〜18の側鎖を有していてもよい飽和または不飽和のアルキル基、アルケニル基、アラルキル基、シクロアルキル基、芳香族基等の炭化水素基、特に炭素数1〜12のアルキル基が好ましい。また置換基は1個のArに0〜4個有していてもよい。特に0〜2個の置換基を有する場合に好結果が得られる。Arがナフチル基の場合、Nはα位に結合していてもβ位に結合していてもよい。特に好ましいArおよびAr’はフェニル基、ナフチル基、2−アルキルフェニル基、4−アルキルフェニル基、2,4−ジアルキルフェニル基である。Rは水素または、炭素数1〜18の側鎖を有していてもよい飽和または不飽和の脂肪族炭化水素基である。特にRが水素または低級アルキル基において好結果がが得られる。
【0012】
本発明にとって好ましい典型的な芳香族アミン類の例はジフェニルアミン、4−オクチルジフェニルメタン、4−ノニルジフェニルアミン、2,2’,4,4’−テトラブチルジフェニルアミン、2,2’−ジブチル−4,4’−ジオクチルジフェニルアミン、2,2’−ジメチル−4,4’−ジオクチルジフェニルアミン、2,2’−ジエチル−4,4’−ジオクチルジフェニルアミン等が例示される。特に好ましい芳香族アミンは、4−オクチルジフェニルアミン、4−ノニルジフェニルアミン、4,4’−ジオクチルジフェニルアミン、4,4’−ジノニルジフェニルアミン等である。
【0013】
脂肪族アミンとしては、炭素数8から16の1級アミンで、オクチルアミン、イソオクチルアミン、デシルアミン、イソデシルアミン、ドデシルアミン、イソドデシルアミン、トリデシルアミン、イソトリデシルアミン、テトラデシルアミン、イソテトラデシルアミン、ヘキサデシルアミン、イソヘキサデシルアミンが例示される。特に好ましい脂肪族アミンは、ドデシルアミン、イソドデシルアミン、トリデシルアミン、イソトリデシルアミン、テトラデシルアミン、イソテトラデシルアミンである。
【0014】
芳香族アミンおよび脂肪族アミンは酸性リン酸エステルに対して過剰量用いてもよい。
本発明の冷間圧延油添加剤には更に脂肪酸、乳化剤、酸化防止剤等の他の成分を添加剤することもできる。
本発明の冷間圧延油添加剤はベース油100重量部に対して、0.7〜25重量部、好ましくは2〜15重量部用いる。
本発明の冷間圧延油添加剤を配合するベース油には、一般にベース油として使用されている鉱物油、動植物油、合成エステルまたはこれらの混合物が使用できる。
本発明の冷間圧延油添加剤をベース油に混合するに当たっては特別の混合機は必要でなく、通常の液体混合用のミキサーを用いて混合することができる。
【0015】
【実施例】
以下実施例により本発明をより具体的に説明する。
ポリエステルの調製
表1に記載した通りの原料(ポリオール、脂肪酸、二塩基酸および一価アルコール)を記載の配合比で用いて、次のようにして本実施例および比較例に用いたポリエステルを調製した。表1中のポリエステル1の重合方法を以下に示す。
ポリエステル1の重合方法
4つ口フラスコに撹拌機、温度センサー、窒素ガス吹き込み管、水分離デカンター付きコンデンサーを付け、ペンタエリスリトール136g(1.0モル)、オレイン酸508g(1.8モル)を仕込み、160℃〜230℃まで2時間かけて昇温する。酸価12.5で160℃に降温し、アジピン酸131g(0.9モル)を仕込み、220℃に昇温、酸価10.5でオクチルアルコール26g(0.2モル)を仕込み、減圧脱水後、酸価2.7で取り出し濾過した。水酸基価35、Mw/Mn=12、分子量約5万の淡褐色液体が得られた。
同様にして、表1に記載した原料配合比のポリエステル2〜6を作成した。
表1には得られたポリエステルの重量平均分子量を示した。
【0016】
【表1】
Figure 0003550449
【0017】
実施例 1〜7
上記で調製したポリエステルに極圧添加剤として燐酸ブチルエステル(モノ:ジ=1:1)4−オクチルジフェニルアミン塩(一部未中和)、燐酸イソオクチルエステル(モノ:ジ=1:1)4−ノニルジフェニルアミン(一部未中和)、燐酸メチルエステル(モノ:ジ=1:1)イソトリデシルアミン(一部未中和)のいずれかと、ダイマー酸を加えて冷間圧延油添加剤とし、これをベース油(パーム油またはトリメチロールプロパントリオレエート)に対して4%混合して冷間圧延油を調製した。各成分の配合割合は表2に示した通りである。
【0018】
【表2】
Figure 0003550449
【0019】
※〔極圧添加剤〕 A:リン酸ブチルエステル(モノ:ジ=1:1)4−オクチル
ジフェニルアミン塩(一部未中和)
B:リン酸イソオクチルエステル(モノ:ジ=1:1)4−ノニル
ジフェニルアミン塩(一部未中和)
C:リン酸メチルエステル(モノ:ジ=1:1)イソトリデシル
アミン塩(一部未中和)
D:トリクレジルホスフェート
【0020】
比較例 1〜8
実施例と同じようにして、表2に記載の配合割合で比較例1〜8の冷間圧延油を調製した。
【0021】
潤滑特性の評価
(1)高速四球式摩擦試験機による評価
実施例1〜7および比較例1〜8の冷間圧延油につき潤滑特性を評価した。
高圧下、高速での冷間圧延時の焼付性能を評価するために、高速四球式摩擦試験機を用いて、耐圧荷重を測定した。耐圧荷重は冷間圧延油が油膜切れを起こす直前の荷重の大きさであり、これにより焼き付の尺度となる。
(2)表面性試験機による評価
実施例1〜7および比較例1〜8の冷間圧延油につき潤滑特性を評価した。
高圧下、高速での冷間圧延時の焼付性能を評価するために、表面性試験機を用いて、摩擦係数が0.5に至るまでの摺動回数を測定した。表面性試験機は高速四球式摩擦試験機に比べて低すべり速度且つ低荷重での評価となるため、摩擦発熱の低い領域での耐焼付性の尺度となる。
高速四球式摩擦試験機と表面性試験機の結果を表3に示した。本発明品は、両方の試験結果に於いて良好な結果が得られ、冷間圧延油としての耐圧荷重能が著しく高いことが明瞭である。
【0022】
【表3】
Figure 0003550449
【0023】
試験方法
1)高速四球式摩擦試験機を用い、以下の条件で測定した。
試料:ニート
測定温度:50℃
回転数:500rpm
ボール:φ1/2インチ SUJ−2
荷重負荷速度:120kg/min
2)表面性試験機を用い、以下の条件で測定した。
試験用鋼板:JIS−G−3141 SPCC−SB
使用鋼球:φ15/64 JIS−B−1501
測定温度:50℃
滑り速度:1m/min
垂直荷重:200g
鋼板塗布油量:100mg/m
評価:摩擦係数が0.5に至るまでの摺動回数
【0024】
(3)実機圧延機による評価
表2に示した実施例1および比較例6の配合の冷間圧延油添加剤をパーム油に添加して、以下の条件で実機を用いて評価した。評価結果を表4に示した。
Figure 0003550449
本発明の冷間圧延添加剤を用いた評価では、高圧圧延速度でも優れた潤滑特性を有し、焼付は発生しなかった。
【0025】
【表4】
Figure 0003550449
【0026】
【発明の効果】
本発明の冷間圧延油添加剤を配合した冷間圧延油は極めて高い耐圧荷重を呈し、高圧高速時のブリキ鋼板等の冷間圧延において、優れた焼付防止作用を有する。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cold rolling oil additive suitable for high speed rolling and a cold rolling oil containing this additive.
[0002]
[Prior art]
Since a tin plate is a type of steel produced at high speed under high pressure, a natural oil or fat such as palm oil which is inexpensive and has excellent lubricity has been used in the direct method. However, with a decrease in the basis weight of plating and an increase in demand for surface aesthetics, surface defects due to slight baking have become unacceptable. Conventionally, methods such as the addition of extreme pressure additives or oiliness improvers, or the improvement of plate-out by enlarging the emulsion particle size have been used, but a complete solution to seizure during high-speed rolling has been reached. Not all products have escaped due to speed restrictions.
As a method for improving such a defect, a polymer such as polybutene or polydecyl methacrylate is sometimes used, but the effect is not satisfactory.
[0003]
[Problems to be solved by the invention]
Provided is a rolling oil capable of preventing seizure during high-speed cold rolling such as tin rolling.
[0004]
[Means for Solving the Problems]
The present invention relates to a cold rolling additive comprising a polyester compound having a fatty acid ester group in a side chain and a weight average molecular weight of 10,000 to 300,000 and an amine salt of an organic acid phosphate as essential components.
The polyester compound of the present invention is a compound having a fatty acid ester group in a side chain and having a weight average molecular weight of 10,000 to 300,000, and (a) a trivalent to hexavalent polyol, (b) a fatty acid and (c) a dibasic acid. Is an ester reactant.
The polyester compound of the present invention has the general formula:
Figure 0003550449
The compound represented by
Further, the present invention contains 0.5 to 20.0 parts by weight of the above-mentioned polyester compound and 0.2 to 5.0 parts by weight of the above-mentioned organic acid phosphoric ester based on 100 parts by weight of the base oil and the base oil. Related to cold rolling oil.
[0005]
The polyester compound and the amine salt of an organic acid phosphate ester complementarily prevent metal contact between the roll and the strip in a roll bite at the time of high-speed high-pressure cold rolling, thereby preventing seizure from occurring and reducing the rolling load. Is also reduced. This effect is exhibited when both the polyester compound and the amine salt of the organic acidic phosphoric acid ester are used at the same time. In either case, the effect is not sufficient.
Polyester compounds have a higher molecular weight than oiliness improvers such as oleic acid and dimer acid, and have excellent stability at high temperatures. Sintering is suppressed until the effect of the agent appears, enabling stable operation even during high-speed rolling. If only a thickening effect is expected, polybutene, polydecyl methacrylate, and the like can be considered, but these cannot be expected to have a sufficient effect due to a large shear resistance of an oil film. Therefore, in the present invention, a polyester having a fatty acid ester group in a side chain is used to reduce the shear resistance, and the weight average molecular weight is set to 10,000 to 300,000.
When the weight average molecular weight of the polyester compound is less than 10,000, the effect of preventing seizure is not sufficient, and when it exceeds 300,000, the polyester compound becomes a gel. Further, when there is no fatty acid ester group in the side chain, if the weight average molecular weight is 10,000 or more, solubility in palm oil or the like used as a rolling oil base oil is poor, causing a problem in use.
[0006]
Examples of the trivalent to hexavalent polyol include glycerin, trimethylolethane, trimethylolpropane, pentaerythritol, sorbitol, diglycerin, dipentaerythritol and the like. Particularly preferred polyols are neopentyl type polyols such as trimethylolethane, trimethylolpropane and pentaerythritol. Polyesters composed of divalent polyols are poor in compatibility with animal and vegetable fats and oils and fatty acid esters, and have poor hydrolysis resistance, because the fatty acid groups are bonded only to the terminal of the molecule and fatty acid ester groups cannot be introduced into the side chains. In general, polyols having a valency of more than 6 are hardly industrially available, and polysaccharides are liable to undergo heat and oxidative deterioration, which is not preferable.
[0007]
As the fatty acid, a saturated fatty acid having 12 to 22 carbon atoms, an unsaturated fatty acid, such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, palmitoleic acid, erucic acid, isostearic acid, or coconut oil And fatty acids obtained from animal and vegetable oils such as beef tallow, palm oil and the like. Fatty acids having less than 12 carbon atoms are inferior in lubricating performance, while fatty acids having more than 22 carbon atoms are not preferred because the resulting polyester tends to solidify at room temperature and is poorly dispersed in water.
[0008]
Examples of the dibasic acid include aliphatic dibasic acids having 4 to 12 carbon atoms, such as succinic acid, maleic acid, adipic acid, azelaic acid, sebacic acid and dodecanedicarboxylic acid. When the number of carbon atoms is less than 4, hydrolysis is liable to occur, and when the number of carbon atoms is more than 12, the pour point is undesirably high. Further, in the case of an alicyclic dibasic acid or an aromatic dibasic acid, the flexibility of the obtained polyester is lost, and the lubricity is reduced.
[0009]
The polyester of the present invention tends to gel as the hydroxyl value of the polyhydric alcohol increases. When a monohydric alcohol is added at a stage where the reaction has progressed to some extent after the addition of the dibasic acid, gelation can be suppressed, so that the use of a monohydric alcohol in combination may be preferable.
[0010]
The amine salt of an organic acid phosphoric acid ester is a salt of an ester of a hydroxyl group-containing organic compound with phosphoric acid and an amine, and is added in an amount of 0.2 to 5.0 parts by weight based on 100 parts by weight of the base oil. As the hydroxyl group-containing organic compound, aliphatic alcohols, alicyclic alcohols, aliphatic aromatic alcohols, aromatic hydroxy compounds, polyhydric alcohols, polyether hydroxy compounds, polyester hydroxy compounds and the like are used. At least one of the three OH groups of the phosphoric acid forms an ester with the hydroxyl-containing organic compound, and at least one of the remaining OH groups constitutes an amine salt. The other OH may be an ester or a salt with an amine, or may be a free OH group or a salt with an alkali other than an amine. It is preferable that the organic acid phosphate ester has 1 to 2 ester residues per molecule, and the degree of neutralization is 40% or more, particularly 50 to 70%, of the residual OH groups, and all of them are particularly neutralized. It is preferably neutralized with an amine.
[0011]
Amines include aromatic or aliphatic amines.
The aromatic amine has the general formula:
Ar-NR-Ar '
(Wherein, Ar and Ar ′ each independently represent an aromatic group which may have a substituent, and R represents hydrogen or an alkyl group). Preferred Ar and Ar ′ are At least one is a phenyl group which may have a substituent, and the other is a phenyl or naphthyl group which may have a substituent. As the substituent, a hydrocarbon group such as a saturated or unsaturated alkyl group, alkenyl group, aralkyl group, cycloalkyl group or aromatic group which may have a side chain having 1 to 18 carbon atoms, particularly Preferred are 1-12 alkyl groups. Further, one Ar may have 0 to 4 substituents. Good results are obtained especially when the compound has 0 to 2 substituents. When Ar is a naphthyl group, N may be bonded to α-position or β-position. Particularly preferred Ar and Ar 'are phenyl, naphthyl, 2-alkylphenyl, 4-alkylphenyl, and 2,4-dialkylphenyl. R is hydrogen or a saturated or unsaturated aliphatic hydrocarbon group which may have a side chain having 1 to 18 carbon atoms. Good results are obtained especially when R is hydrogen or a lower alkyl group.
[0012]
Examples of typical aromatic amines preferred for the present invention are diphenylamine, 4-octyldiphenylmethane, 4-nonyldiphenylamine, 2,2 ', 4,4'-tetrabutyldiphenylamine, 2,2'-dibutyl-4,4 Examples include '-dioctyldiphenylamine, 2,2'-dimethyl-4,4'-dioctyldiphenylamine, and 2,2'-diethyl-4,4'-dioctyldiphenylamine. Particularly preferred aromatic amines are 4-octyldiphenylamine, 4-nonyldiphenylamine, 4,4'-dioctyldiphenylamine, 4,4'-dinonyldiphenylamine and the like.
[0013]
The aliphatic amine is a primary amine having 8 to 16 carbon atoms, such as octylamine, isooctylamine, decylamine, isodecylamine, dodecylamine, isododecylamine, tridecylamine, isotridecylamine, tetradecylamine, Isotetradecylamine, hexadecylamine and isohexadecylamine are exemplified. Particularly preferred aliphatic amines are dodecylamine, isododecylamine, tridecylamine, isotridecylamine, tetradecylamine, isotetradecylamine.
[0014]
Aromatic amines and aliphatic amines may be used in excess with respect to the acid phosphate.
The cold rolling oil additive of the present invention may further contain other components such as a fatty acid, an emulsifier, and an antioxidant.
The cold rolling oil additive of the present invention is used in an amount of 0.7 to 25 parts by weight, preferably 2 to 15 parts by weight, based on 100 parts by weight of the base oil.
As the base oil to which the cold rolling oil additive of the present invention is blended, a mineral oil, an animal or vegetable oil, a synthetic ester or a mixture thereof generally used as the base oil can be used.
No special mixer is required for mixing the cold-rolled oil additive of the present invention with the base oil, and the mixing can be performed using a usual liquid mixing mixer.
[0015]
【Example】
Hereinafter, the present invention will be described more specifically with reference to examples.
Preparation of polyester The raw materials (polyols, fatty acids, dibasic acids and monohydric alcohols) as described in Table 1 were used at the described mixing ratios and used in the following examples and comparative examples as follows. The prepared polyester was prepared. The polymerization method of polyester 1 in Table 1 is shown below.
Polyester 1 polymerization method A four-necked flask was equipped with a stirrer, a temperature sensor, a nitrogen gas injection tube, a condenser with a water separation decanter, and charged with 136 g (1.0 mol) of pentaerythritol and 508 g (1.8 mol) of oleic acid. And 160 ° C to 230 ° C over 2 hours. The temperature was lowered to 160 ° C at an acid value of 12.5, 131 g (0.9 mol) of adipic acid was charged, the temperature was raised to 220 ° C, 26 g (0.2 mol) of octyl alcohol was charged at an acid value of 10.5, and dehydration was performed under reduced pressure. Thereafter, the mixture was taken out at an acid value of 2.7 and filtered. A pale brown liquid having a hydroxyl value of 35, Mw / Mn = 12, and a molecular weight of about 50,000 was obtained.
Similarly, polyesters 2 to 6 having the raw material mixing ratios shown in Table 1 were prepared.
Table 1 shows the weight average molecular weight of the obtained polyester.
[0016]
[Table 1]
Figure 0003550449
[0017]
Example 1-7
Butyl phosphate (mono: di = 1: 1) 4-octyldiphenylamine salt (partially unneutralized), isooctyl phosphate (mono: di = 1: 1) 4 as an extreme pressure additive to the polyester prepared above Addition of nonyldiphenylamine (partially unneutralized), phosphoric acid methyl ester (mono: di = 1: 1) isotridecylamine (partially unneutralized) and dimer acid to make a cold rolling oil additive This was mixed with a base oil (palm oil or trimethylolpropane trioleate) at 4% to prepare a cold-rolled oil. The mixing ratio of each component is as shown in Table 2.
[0018]
[Table 2]
Figure 0003550449
[0019]
* [Extreme pressure additive] A: butyl phosphate (mono: di = 1: 1) 4-octyldiphenylamine salt (partially unneutralized)
B: isooctyl phosphate (mono: di = 1: 1) 4-nonyldiphenylamine salt (partially neutralized)
C: Phosphoric acid methyl ester (mono: di = 1: 1) isotridecylamine salt (partially neutralized)
D: tricresyl phosphate
Comparative example 1-8
In the same manner as in the examples, cold rolling oils of Comparative Examples 1 to 8 were prepared at the compounding ratios shown in Table 2.
[0021]
Evaluation of lubrication characteristics (1) Evaluation by high-speed four-ball friction tester The lubrication characteristics of the cold rolling oils of Examples 1 to 7 and Comparative Examples 1 to 8 were evaluated.
In order to evaluate the seizure performance during high-speed cold rolling under high pressure, the pressure resistance load was measured using a high-speed four-ball friction tester. The withstand pressure load is the magnitude of the load immediately before the cold rolling oil breaks the oil film, and serves as a measure of seizure.
(2) Evaluation by Surface Property Tester The lubricating properties of the cold rolling oils of Examples 1 to 7 and Comparative Examples 1 to 8 were evaluated.
In order to evaluate the seizure performance at the time of high-speed cold rolling under high pressure, the number of slidings until the friction coefficient reached 0.5 was measured using a surface property tester. Since the surface property tester is evaluated at a low sliding speed and a low load as compared with the high-speed four-ball friction tester, it is a measure of seizure resistance in a region where frictional heat generation is low.
Table 3 shows the results of the high-speed four-ball friction tester and the surface property tester. It is clear that the product of the present invention obtained good results in both test results and has a remarkably high pressure load capability as a cold rolling oil.
[0022]
[Table 3]
Figure 0003550449
[0023]
Test method 1) Using a high-speed four-ball friction tester, the measurement was performed under the following conditions.
Sample: Neat measurement temperature: 50 ° C
Rotation speed: 500 rpm
Ball: 1/2 inch SUJ-2
Loading speed: 120 kg / min
2) Using a surface property tester, the measurement was performed under the following conditions.
Test steel sheet: JIS-G-3141 SPCC-SB
Used steel ball: φ15 / 64 JIS-B-1501
Measurement temperature: 50 ° C
Sliding speed: 1m / min
Vertical load: 200g
Steel plate coating oil amount: 100 mg / m 2
Evaluation: Number of slides until the friction coefficient reaches 0.5
(3) Evaluation by Actual Rolling Mill The cold rolling oil additive having the composition of Example 1 and Comparative Example 6 shown in Table 2 was added to palm oil, and evaluated using the actual rolling mill under the following conditions. Table 4 shows the evaluation results.
Figure 0003550449
In the evaluation using the cold rolling additive of the present invention, the lubricating property was excellent even at a high pressure rolling speed, and no seizure occurred.
[0025]
[Table 4]
Figure 0003550449
[0026]
【The invention's effect】
The cold rolling oil containing the cold rolling oil additive of the present invention exhibits an extremely high pressure resistance load and has an excellent anti-seizure effect in cold rolling of a tin plate at high pressure and high speed.

Claims (6)

側鎖に脂肪酸エステル基を持つ重量平均分子量が1万〜30万のポリエステル化合物と有機酸性リン酸エステルのアミン塩を必須成分とする冷間圧延油添加剤。A cold rolling oil additive comprising, as essential components, a polyester compound having a fatty acid ester group in a side chain and a weight average molecular weight of 10,000 to 300,000 and an amine salt of an organic acid phosphate ester. ポリエステル化合物が、(a)n価(n=3〜6)のポリオール、(b)脂肪酸および(c)二塩基酸からなり、a:b:c=1:(n−2)〜(n−2.5):0.7〜1.0のモル比率で反応させてなる請求項1記載の添加剤。The polyester compound comprises (a) an n-valent (n = 3 to 6) polyol, (b) a fatty acid and (c) a dibasic acid, and a: b: c = 1: (n−2) to (n− 2.5) The additive according to claim 1, which is reacted in a molar ratio of 0.7 to 1.0. ポリエステル化合物が一般式
Figure 0003550449
である請求項1記載の添加剤。
The polyester compound has the general formula
Figure 0003550449
The additive according to claim 1, which is:
有機酸性リン酸エステルのアミン塩のアミンが一般式
Ar−NR−Ar'
(式中:ArおよびAr'はそれぞれ独立して置換基を有していてもよい芳香族基、 Rは水素またはアルキル基を示す)
である請求項1から3いずれか記載の添加剤。
The amine of the amine salt of the organic acid phosphate is represented by the general formula Ar-NR-Ar '
(Wherein, Ar and Ar ′ each independently represent an aromatic group which may have a substituent, and R represents hydrogen or an alkyl group)
The additive according to any one of claims 1 to 3, wherein
有機酸性リン酸エステルのアミン塩のアミンが一般式
R−NH
(Rはアルキル基を示す)
である請求項1から3いずれかに記載の添加剤。
The amine of the amine salt of the organic acid phosphate is represented by the general formula R—NH 2
(R represents an alkyl group)
The additive according to any one of claims 1 to 3, wherein
ベース油およびこのベース油100重量部に対し請求項1〜3いずれかに記載のポリエステル化合物0.5〜20.0重量部、および上記の有機酸性リン酸エステル0.2〜5.0重量部を含有する冷間圧延油。 A polyester oil according to any one of claims 1 to 3 in an amount of from 0.5 to 20.0 parts by weight and an organic acid phosphoric acid ester in an amount of from 0.2 to 5.0 parts by weight based on 100 parts by weight of the base oil and the base oil. Containing cold rolling oil.
JP20558395A 1995-08-11 1995-08-11 Cold rolling oil additives and cold rolling oils Expired - Fee Related JP3550449B2 (en)

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* Cited by examiner, † Cited by third party
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JPS5217516B2 (en) * 1972-04-14 1977-05-16
JPH0786199B2 (en) * 1990-09-05 1995-09-20 日本クエーカー・ケミカル株式会社 Rolling oil additives and rolling oil
JPH06108079A (en) * 1992-09-29 1994-04-19 Nkk Corp Cold rolling oil for tin plate
JP3331013B2 (en) * 1993-07-26 2002-10-07 新日本製鐵株式会社 Cold rolling oil composition for titanium plate

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