JPH0768537B2 - Urea grease composition for large vertical roller bearings - Google Patents
Urea grease composition for large vertical roller bearingsInfo
- Publication number
- JPH0768537B2 JPH0768537B2 JP2269502A JP26950290A JPH0768537B2 JP H0768537 B2 JPH0768537 B2 JP H0768537B2 JP 2269502 A JP2269502 A JP 2269502A JP 26950290 A JP26950290 A JP 26950290A JP H0768537 B2 JPH0768537 B2 JP H0768537B2
- Authority
- JP
- Japan
- Prior art keywords
- parts
- grease
- mineral oil
- average molecular
- molecular weight
- 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
Links
Landscapes
- Rolling Contact Bearings (AREA)
- Lubricants (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、大型竪型ころ軸受用ウレアグリース組成物に
関する。更に詳しくは、ころの直径が20mm以上の大型な
竪型ころ軸受を潤滑するためのウレアグリース組成物に
関する。さらに詳しくは、ころの直径が20mm以上のころ
軸受を潤滑する為のグリース組成物に関する。TECHNICAL FIELD The present invention relates to a urea grease composition for large vertical roller bearings. More specifically, it relates to a urea grease composition for lubricating a large vertical roller bearing having a roller diameter of 20 mm or more. More specifically, it relates to a grease composition for lubricating a roller bearing having a roller diameter of 20 mm or more.
従来の技術 製鉄所でスラブを製造する場合、連続鋳造機を使ってい
る。この連続鋳造機を停止すると非常に非能率となるの
で、出来るだけ連続して幅広のスラブを製造し、幅狭の
スラブはサイジングミルで幅狭に圧延して作る。このサ
イジングミルには竪型カリバーロールが使われている。Conventional technology When manufacturing slabs in steelworks, continuous casting machines are used. When this continuous casting machine is stopped, it becomes very inefficient, so a wide slab is manufactured continuously as much as possible, and a narrow slab is rolled by a sizing mill to be narrow. Vertical caliber rolls are used in this sizing mill.
このカリバーロールは上下に大型竪型ころ軸受が使用さ
れており、各軸受の上部に集中給油設備でグリースが0.
5〜３時間間隔で集中給脂されている。このグリースは
一般に圧延機に使用されている、ちょう度No.0〜２号の
一般的なウレア基グリース、リチウム石けん基グリー
ス、アルミ複合石けん基グリース、カルシウム複合石け
ん基グリース、カルシウム石けん基グリースである。こ
れらのグリースを大型竪型ころ軸受に使用する場合、集
中給脂設備を使用しているが、運転をはじめると短時間
内に下方に垂れ落ちるので、短時間毎に給脂しないと、
上部の潤滑部分にグリース切れが起きかなりの頻度で軸
受にかじりや剥離が生じる。一方短時間毎に給脂を行う
為、下方に相当量の使用後グリースが垂れ落ち、冷却水
と共に流れ、水処理に大きな問題を提起する他、更に給
脂設備の保全に大きな留意を要するなどの問題があり、
従来のグリースよりも軸受でのグリース保持性が格段に
優れ、一回の充填で長期間良好な潤滑が保てるグリース
が要求されていた。また形鋼の竪型ころ軸受でも同様の
問題がある。This caliber roll uses large vertical roller bearings at the top and bottom, and grease is zero in the central lubrication equipment at the top of each bearing.
Concentrated greasing is performed every 5 to 3 hours. This grease is a general urea-based grease with consistency No. 0 to 2, lithium soap-based grease, aluminum composite soap-based grease, calcium composite soap-based grease, calcium soap-based grease that is commonly used in rolling mills. is there. When using these greases for large vertical roller bearings, a centralized greasing facility is used, but since it drips downward in a short time after starting operation, it must be lubricated every short time.
Depletion of grease occurs in the lubricated part of the upper part, and galling and peeling of the bearing occur frequently. On the other hand, since greasing is performed every short time, a considerable amount of grease drops down after use, flows with cooling water, poses a major problem in water treatment, and requires great attention to the maintenance of greasing equipment. There is a problem
Grease retention in the bearing is far superior to that of conventional grease, and there has been a demand for grease that can maintain good lubrication for a long time with one filling. A vertical roller bearing of shaped steel also has the same problem.
発明が解決しようとする課題 本発明者らはかかる実情に鑑み、鋭意研究を重ねた結
果、軸受定期分解洗浄点検時にグリースを充填し、圧延
機組み込み後、次回の組み替え迄軸受にグリースを給脂
する必要のない大型竪型ころ軸受用ウレアグリース組成
物を発見した。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In view of the above situation, the present inventors have earnestly studied, and as a result, filled the grease at the time of periodical disassembly and inspection of the bearing, installed the rolling mill, and then greased the bearing until the next reassembling. We have discovered a urea grease composition for large vertical roller bearings that does not need to be processed.
課題を解決するための手段 本発明の手段は、次の２つの特徴を有する。Means for Solving the Problems The means of the present invention has the following two features.
．基油として粘度が100℃で10〜35cStの鉱油と、この
鉱油100重量％に対して、４〜12重量％のウレア系増ち
ょう剤と、３〜６重量％の平均分子量20,000〜100,000
の水素化スチレン−イソプレン共重合体と、平均分子量
1,500〜5,000の酸化変性ポリオレフィンとを主成分と
し、前記水素化スチレン−イソプレン共重合体と酸化変
性ポリオレフィンとを合計量で４〜８重量％含有せしめ
且つこの合計量に対する前記水素化スチレン−イソプレ
ン共重合体の配合割合を50〜86％にしたことを特徴とす
る大型竪型ころ軸受用ウレアグリース組成物。． Mineral oil having a viscosity of 10 to 35 cSt at 100 ° C. as a base oil, 4 to 12% by weight of a urea thickener with respect to 100% by weight of this mineral oil, and 3 to 6% by weight of an average molecular weight of 20,000 to 100,000
Hydrogenated styrene-isoprene copolymer with an average molecular weight
The main component is 1,500 to 5,000 oxidation-modified polyolefin, and the hydrogenated styrene-isoprene copolymer and the oxidation-modified polyolefin are contained in a total amount of 4 to 8% by weight, and the hydrogenated styrene-isoprene copolymer is contained in the total amount. A urea grease composition for large vertical roller bearings, characterized in that the blending ratio of the polymer is 50 to 86%.
．基油として粘度が100℃で10〜35cStの鉱油と、この
鉱油100重量％に対して、４〜12重量％のウレア系増ち
ょう剤と、３〜６重量％の平均分子量20,000〜100,000
の水素化スチレン−イソプレン共重合体と、平均分子量
1,500〜5,000の酸変性ポリオレフィンとを主成分とし、
前記水素化スチレン−イソプレン共重合体と酸変性ポリ
オレフィンとを合計量で４〜８重量％含有せしめ且つこ
の合計量に対する前記水素化スチレン−イソプレン共重
合体の配合割合を50〜86％にしたことを特徴とする大型
竪型ころ軸受用ウレアグリース組成物。． Mineral oil having a viscosity of 10 to 35 cSt at 100 ° C. as a base oil, 4 to 12% by weight of a urea thickener with respect to 100% by weight of this mineral oil, and 3 to 6% by weight of an average molecular weight of 20,000 to 100,000
Hydrogenated styrene-isoprene copolymer with an average molecular weight
Based on 1,500 to 5,000 acid-modified polyolefin,
The hydrogenated styrene-isoprene copolymer and the acid-modified polyolefin are contained in a total amount of 4 to 8% by weight and the blending ratio of the hydrogenated styrene-isoprene copolymer to the total amount is 50 to 86%. A urea grease composition for large vertical roller bearings, characterized in that
本発明に使用する増粘着剤として用いる水素化スチレン
−イソプレン共重合物は平均分子量２万〜10万で通常潤
滑油の粘度指数向上剤として普通１〜２％添加して使わ
れているものである。The hydrogenated styrene-isoprene copolymer used as the tackifying agent in the present invention has an average molecular weight of 20,000 to 100,000 and is usually used by adding 1 to 2% as a viscosity index improver of lubricating oil. is there.
酸化変性ポリオレフィン、酸変性ポリオレフィン、は平
均分子量1,500〜5,000で炭素数２〜８のアルキル基、カ
ルボキシル基、ケト基、アルデヒド基、水素基、アルキ
ルカルボキシル基またはその無水物が結合しているもの
を用いる。例えばマレイン酸、フマル酸、イタコン酸、
ハイミック酸などの不飽和多価カルボン酸またはこれら
の酸無水物、アルキルエスエルなどの不飽和多価カルボ
ン酸化合物をポリオレフィンにグラフト化させる変性な
どを言う。上述の酸化変性ポリオレフィンおよび酸変性
ポリオレフィンは従来主として各種樹脂の内部潤滑用、
印刷インキまたは塗料の耐摩耗添加剤、自動車または床
のつや出し剤および繊維加工補助材などとして用いられ
ている。Oxidation-modified polyolefin and acid-modified polyolefin are those with an average molecular weight of 1,500 to 5,000 and an alkyl group having 2 to 8 carbon atoms, a carboxyl group, a keto group, an aldehyde group, a hydrogen group, an alkylcarboxyl group or an anhydride thereof. To use. For example, maleic acid, fumaric acid, itaconic acid,
It refers to a modification in which an unsaturated polycarboxylic acid such as a hymic acid or an acid anhydride thereof or an unsaturated polycarboxylic acid compound such as an alkyl ester is grafted to a polyolefin. The above-mentioned oxidation-modified polyolefin and acid-modified polyolefin are conventionally mainly used for internal lubrication of various resins,
It is used as an anti-wear additive for printing inks and paints, as a polish for automobiles or floors, and as a fiber processing aid.
本発明はウレアグリースにこれらの増粘着剤を４〜８％
添加混合して得られる。本発明の増粘着剤の添加量の合
計が４％以下では添加量が少なすぎて増粘着効果が少な
く付着が悪く軸受けから垂れ落ちやすくなり、８％を越
え添加するとグリースが硬くなり、必要なちょう度のN
o.2を維持しようとすると増ちょう剤の割合を少なくし
なければならず、グリース本来の必要性能である機械安
定性（軟化しにくさ）や耐高温性などが悪くなるので本
発明のグリース組成物には増粘着剤はグリース中に４〜
８％含有する様添加される。静的な短時間の試験では
（１）のみでも付着性は良くなるが、（１）は分子量が
大きい為、これだけを多く加えるとグリースの機械的安
定性が低下する傾向があり（２）との併用でこれを改善
することができ、長時間使用中の性能低下を防ぐ効果を
期待出来る。（２）だけではたれ落ち性の改善効果が十
分でない。In the present invention, these greases are added to urea grease in an amount of 4 to 8%.
It is obtained by adding and mixing. If the total amount of the tackifier of the present invention added is 4% or less, the amount of tackifier added is too small and the tackifying effect is small, resulting in poor adhesion and easy dripping from the bearing. If it exceeds 8%, the grease becomes hard and necessary. Consistency N
In order to maintain o.2, the proportion of the thickener must be decreased, and the mechanical stability (hardness to soften) and high temperature resistance, which are essential performances of the grease, are deteriorated. The composition has a thickening agent of 4 to 4 in the grease.
8% is added. In the static short-time test, the adhesion is improved even by (1) alone, but since (1) has a large molecular weight, adding a large amount of this tends to decrease the mechanical stability of the grease (2). This can be improved by the combined use of the above, and the effect of preventing performance deterioration during long-term use can be expected. (2) alone is not sufficient to improve the effect of sagging.
即ち、本発明における、増粘着剤としては、本発明の実
施例にも記載の通り、平均分子量20,000〜100,000の水
素化スチレン−イソプレン共重合体３〜６重量％に、平
均分子量1,500〜5,000の酸化変性ポリオレフィン又は酸
変性ポリオレフィンを配合して４〜８重量％含有せしめ
且つ前記水素化スチレン−イソプレン共重合体と酸化変
性ポリオレフィン又は酸変性ポリオレフィンの合計量に
対する水素化スチレン−イソプレン共重合体の配合割合
を50〜86％とすることが最も好ましい。That is, as the tackifying agent in the present invention, as described in the examples of the present invention, hydrogenated styrene-isoprene copolymer having an average molecular weight of 20,000 to 100,000 and 3 to 6% by weight, and having an average molecular weight of 1,500 to 5,000 are used. The oxidation-modified polyolefin or the acid-modified polyolefin is blended to contain 4 to 8% by weight, and the hydrogenated styrene-isoprene copolymer is blended with respect to the total amount of the hydrogenated styrene-isoprene copolymer and the oxidation-modified polyolefin or the acid-modified polyolefin. Most preferably, the ratio is 50-86%.
なお、本発明のグリース組成物には極圧添加剤、防錆
剤、腐食防錆剤などの添加剤を添加することが出来る。In addition, additives such as extreme pressure additives, rust preventives, and corrosion rust preventives can be added to the grease composition of the present invention.
以下に本発明の実施例に基づいて説明する。Below, it demonstrates based on the Example of this invention.
実施例１ 4,4ジフェニルメタンジイソシアネート41.1部と鉱油（1
00℃での粘度が14.82cSt−以下実施例、比較１〜４例同
じ）450部を反応釜に入れ、撹拌しながら加熱し、50℃
にした。別の容器にオクチルアミン35.6部を上記鉱油35
0.0部を混合したものを前記反応釜に撹拌しながら入れ
て反応させた。別の容器に鉱油60部にステアリルアミン
8.3部を入れ加熱しながら撹拌し65〜70℃で溶解させた
ものを、前記反応釜に加えこれを撹拌しながら加熱し、
88〜95℃で30分保った後、さらに185℃にし、水素化ス
チレン−イソプレン共重合物（平均分子量45,000）30部
を加えた後30分撹拌した。その後冷却し140℃にし酸化
変性ポリオレフィン（平均分子量2500）20部を入れ、冷
却して130℃で酸化防止剤としてジフェニルアミン５部
を入れ撹拌し、更に80℃に冷却した後、反応釜からだし
ロールミルで処理し、ちょう度（25℃でのちょう度−以
下同じ）281のグリースを得、試料とした。Example 1 41.1 parts of 4,4 diphenylmethane diisocyanate and mineral oil (1
Viscosity at 00 ° C is 14.82 cSt-the following examples, the same as Comparative Examples 1 to 4) 450 parts are put into a reaction kettle and heated with stirring to 50 ° C.
I chose In a separate container, add 35.6 parts of octylamine to the above mineral oil 35
A mixture of 0.0 parts was put into the reaction vessel while stirring and reacted. In a separate container 60 parts mineral oil with stearylamine
8.3 parts was put and stirred while heating and dissolved at 65 to 70 ° C., added to the reaction kettle and heated while stirring,
After maintaining at 88 to 95 ° C for 30 minutes, the temperature was further raised to 185 ° C, 30 parts of hydrogenated styrene-isoprene copolymer (average molecular weight 45,000) was added, and the mixture was stirred for 30 minutes. Then cool to 140 ° C, add 20 parts of oxidation-modified polyolefin (average molecular weight 2500), cool and add 5 parts of diphenylamine as an antioxidant at 130 ° C, stir, and further cool to 80 ° C, then roll out from the reaction kettle Was processed to obtain a grease having a consistency of 281 (the consistency at 25 ° C-the same applies hereinafter), and used as a sample.
実施例２ 4,4ジフェニルメタンジイソシアネート38.7部と鉱油450
部を反応釜に入れ、撹拌しながら加熱し、50℃にした。
別の容器にオクチルアミン33.5部を上記鉱油350.0部を
混合したものを前記反応釜に撹拌しながら入れて反応さ
せた。別の容器に鉱油65部にステアリルアミン7.8部を
入れ加熱しながら撹拌し、65〜70℃で溶解させたもの
を、前記反応釜に加えこれを撹拌しながら加熱し、88〜
95℃で30分保った後、さらに185℃にし、水素化スチレ
ン−イソプレン重合物（平均分子量65,000）40部を加え
た後30分撹拌した。その後冷却し150℃にし酸変性ポリ
オレフィン（平均分子量3500）10部を入れ、冷却して13
0℃で酸化防止剤としてジフェニルアミン５部を入れ撹
拌し、更に80℃に冷却した後、反応釜からだしロールミ
ルで処理し、ちょう度285のグリースを得、試料とし
た。Example 2 38.7 parts of 4,4 diphenylmethane diisocyanate and 450 of mineral oil
Parts were placed in a reaction kettle and heated to 50 ° C. with stirring.
A mixture of 33.5 parts of octylamine and 350.0 parts of the above mineral oil was placed in another container in the reaction vessel while stirring and reacted. Add 7.8 parts of stearylamine to 65 parts of mineral oil in another container and stir while heating, and dissolve at 65-70 ° C, add to the reaction kettle and heat while stirring, 88-
After maintaining at 95 ° C for 30 minutes, the temperature was further raised to 185 ° C, 40 parts of hydrogenated styrene-isoprene polymer (average molecular weight 65,000) was added, and the mixture was stirred for 30 minutes. Then, cool to 150 ° C, add 10 parts of acid-modified polyolefin (average molecular weight 3500), and cool to 13
After adding 5 parts of diphenylamine as an antioxidant at 0 ° C. and stirring, and further cooling to 80 ° C., it was processed with a roll mill taken out of the reaction kettle to obtain a grease with a consistency of 285, which was used as a sample.
実施例３ 4,4ジフェニルメタンジイソシアネート36.3部と鉱油450
部を反応釜に入れ、撹拌しながら加熱し、50℃にした。
別の容器にオクチルアミン31.4部を上記鉱油300.0部を
混合したものを前記反応釜に撹拌しながら入れて反応さ
せた。別の容器に鉱油110部にステアリルアミン7.3部を
入れ加熱しながら撹拌し65〜70℃で溶解させたものを、
前記反応釜に加えこれを撹拌しながら加熱し、88〜95℃
で30分保った後、さらに185℃にし、水素化スチレン−
イソプレン重合物（平均分子量65,000）40部を加えた後
30分撹拌した。その後冷却し150℃にし酸変性ポリオレ
フィン（平均分子量3500）20部を入れ、冷却して130℃
で酸化防止剤としてジフェニルアミン５部を入れ撹拌
し、更に80℃に冷却した後、反応釜からだしロールミル
で処理し、ちょう度277のグリースを得、試料とした。Example 3 36.3 parts of 4,4 diphenylmethane diisocyanate and 450 mineral oil
Parts were placed in a reaction kettle and heated to 50 ° C. with stirring.
A mixture of 31.4 parts of octylamine and 300.0 parts of the above-mentioned mineral oil was put in another container in the reaction vessel while stirring and reacted. Put 7.3 parts of stearylamine in 110 parts of mineral oil in another container and stir with heating to dissolve at 65-70 ° C.
Add to the reaction kettle and heat it with stirring to 88-95 ° C.
After keeping it for 30 minutes at 185 ° C, hydrogenated styrene-
After adding 40 parts of isoprene polymer (average molecular weight 65,000)
It was stirred for 30 minutes. Then cool to 150 ° C, add 20 parts of acid-modified polyolefin (average molecular weight 3500), cool to 130 ° C.
Then, 5 parts of diphenylamine as an antioxidant was added and stirred, and after further cooling to 80 ° C., it was processed from the reaction kettle by a roll mill to obtain a grease having a consistency of 277, which was used as a sample.
実施例４ 4,4ジフェニルメタンジイソシアネート33.8部と鉱油450
部を反応釜に入れ、撹拌しながら加熱し、50℃にした。
別の容器にオクチルアミン29.3部を上記鉱油350.0部を
混合したものを前記反応釜に撹拌しながら入れて反応さ
せた。別の容器に鉱油55部にステアリルアミン6.9部を
入れ加熱しながら撹拌し65〜70℃で溶解させたものを、
前記反応釜に加えこれを撹拌しながら加熱し、88〜95℃
で30分保った後、さらに195℃にし、水素化スチレン−
イソプレン重合物（平均分子量65,000）50部を加えた後
45分撹拌した。その後冷却し150℃にし酸変性ポリオレ
フィン（平均分子量3500）20部を入れ、冷却して130℃
で酸化防止剤としてジフェニルアミン５部を入れ撹拌
し、更に80℃に冷却した後、反応釜からだしロールミル
で処理し、ちょう度275のグリースを得、試料とした。Example 4 33.8 parts of 4,4 diphenylmethane diisocyanate and 450 of mineral oil
Parts were placed in a reaction kettle and heated to 50 ° C. with stirring.
A mixture of 29.3 parts of octylamine and 350.0 parts of the above mineral oil was placed in another container in the reaction vessel while stirring and reacted. In a separate container, add 6.9 parts of stearylamine to 55 parts of mineral oil, stir while heating, and dissolve at 65-70 ° C.
Add to the reaction kettle and heat it with stirring to 88-95 ° C.
After keeping it for 30 minutes at 195 ℃, hydrogenated styrene-
After adding 50 parts of isoprene polymer (average molecular weight 65,000)
It was stirred for 45 minutes. Then cool to 150 ° C, add 20 parts of acid-modified polyolefin (average molecular weight 3500), cool to 130 ° C.
Then, 5 parts of diphenylamine as an antioxidant was added, and the mixture was stirred, cooled to 80 ° C., and then treated with a roll mill taken out of the reaction kettle to obtain a grease having a consistency of 275, which was used as a sample.
実施例５ 4,4ジフエニルメタンジイソシアネート31.4部と鉱油450
部を反応釜に入れ、撹拌しながら加熱し、50℃にした。
別の容器にオクチルアミン27.2部を上記鉱油350.0部を
混合したものを前記反応釜に撹拌しながら入れて反応さ
せた。別の容器に鉱油60部にステアリルアミン6.4部を
入れ加熱しながら撹拌し65〜70℃で溶解させたものを、
前記反応釜に加えこれを撹拌しながら加熱し、88〜95℃
で30分保った後、さらに185℃にし、水素化スチレン−
イソプレン重合物（平均分子量65,000）60部を加えた後
30分撹拌した。その後冷却し150℃にし酸化変性ポリオ
レフィン（平均分子量3500）10部を入れ、冷却して130
℃で酸化防止剤としてジフェニルアミン５部を入れ撹拌
し、更に80℃に冷却した後、反応釜からだしロールミル
で処理し、ちょう度279のグリースを得、試料とした。Example 5 31.4 parts of 4,4 diphenylmethane diisocyanate and 450 mineral oil
Parts were placed in a reaction kettle and heated to 50 ° C. with stirring.
A mixture of 27.2 parts of octylamine and 350.0 parts of the mineral oil was placed in another container in the reaction vessel while stirring and reacted. In a separate container, place 6.4 parts of stearylamine in 60 parts of mineral oil, stir while heating, and dissolve at 65-70 ° C.
Add to the reaction kettle and heat it with stirring to 88-95 ° C.
After keeping it for 30 minutes at 185 ° C, hydrogenated styrene-
After adding 60 parts of isoprene polymer (average molecular weight 65,000)
It was stirred for 30 minutes. Then cool to 150 ° C and add 10 parts of oxidation-modified polyolefin (average molecular weight 3500) and cool to 130
At 5 ° C, 5 parts of diphenylamine as an antioxidant was added and stirred, and further cooled to 80 ° C, and then treated with a roll mill taken out of the reaction kettle to obtain a grease having a consistency of 279, which was used as a sample.
実施例６ 4,4ジフェニルメタンジイソシアネート24.2部と鉱油（1
00℃での粘度が14.82cSt）450部を反応釜に入れ、撹拌
しながら加熱し、50℃にした。別の容器にオクチルアミ
ン21.0部を上記鉱油350.0部を混合したものを前記反応
釜に撹拌しながら入れて反応させた。別の容器に鉱油50
部にステアリルアミン4.8部を入れ加熱しながら撹拌し6
5〜70℃で溶解させたものを、前記反応釜に加えこれを
撹拌しながら加熱し、88〜95℃で30分保った後、さらに
185℃にし、水素化スチレン−イソプレン重合物（平均
分子量65,000）60部を加えた後30分撹拌した。その後冷
却し150℃にし酸化変性ポリオレフィン（平均分子量350
0）20部を入れ、冷却して130℃で酸化防止剤としてジフ
ェニルアミン５部を入れ撹拌し、更に80℃に冷却した
後、反応釜からだしロールミルで処理し、ちょう度284
のグリースを得、試料とした。Example 6 24.2 parts of 4,4 diphenylmethane diisocyanate and mineral oil (1
450 parts of a solution having a viscosity of 14.82 cSt at 00 ° C) was placed in a reaction kettle and heated to 50 ° C with stirring. A mixture of 21.0 parts of octylamine and 350.0 parts of the above mineral oil was placed in another container in the reaction vessel while stirring and reacted. Mineral oil in another container 50
Add 4.8 parts of stearylamine to the parts and stir while heating.
What was dissolved at 5 to 70 ° C was added to the reaction kettle, heated while stirring, and kept at 88 to 95 ° C for 30 minutes.
The temperature was adjusted to 185 ° C., 60 parts of a hydrogenated styrene-isoprene polymer (average molecular weight 65,000) was added, and the mixture was stirred for 30 minutes. After that, it is cooled to 150 ° C, and oxidation-modified polyolefin (average molecular weight 350
0) Add 20 parts, cool and add 5 parts of diphenylamine as an antioxidant at 130 ° C., stir, and further cool to 80 ° C., then remove from the reaction kettle and process with a roll mill to obtain a consistency of 284.
Was obtained as a sample.
比較例１ 4,4ジフェニルメタンジイソシアネート43.5部と鉱油450
部を反応釜に入れ、撹拌しながら加熱し、50℃にした。
別の容器にオクチルアミン43.5部を上記鉱油350.0部を
混合したものを前記反応釜に撹拌しながら入れて反応さ
せた。別の容器に鉱油55部にステアリルアミン8.8部を
入れ加熱しながら撹拌し65〜70℃で溶解させたものを、
前記反応釜に加えこれを撹拌しながら加熱し、88〜95℃
で30分保った後、さらに185℃にし、水素化スチレン−
イソプレン重合物（平均分子量45,000）20部を加えた後
30分撹拌した。その後冷却し150℃にし酸化変性ポリオ
レフィン（平均分子量3500）30部を入れ、冷却して130
℃で酸化防止剤といてジフェニルアミン５部を入れ撹拌
し、更に80℃に冷却した後、反応釜からだしロールミル
で処理し、ちょう度276のグリースを得、試料とした。Comparative Example 1 4,4 diphenylmethane diisocyanate 43.5 parts and mineral oil 450
Parts were placed in a reaction kettle and heated to 50 ° C. with stirring.
A mixture of 43.5 parts of octylamine and 350.0 parts of the above mineral oil was put in another container in the reaction vessel while stirring and reacted. In a separate container, put 8.8 parts of stearylamine in 55 parts of mineral oil, stir while heating, and dissolve at 65-70 ° C.
Add to the reaction kettle and heat it with stirring to 88-95 ° C.
After keeping it for 30 minutes at 185 ° C, hydrogenated styrene-
After adding 20 parts of isoprene polymer (average molecular weight 45,000)
It was stirred for 30 minutes. Then, cool to 150 ° C, add 30 parts of oxidation-modified polyolefin (average molecular weight 3500), and cool to 130
At 5 ° C, 5 parts of diphenylamine as an antioxidant was added and stirred, and after cooling to 80 ° C, the mixture was processed with a roll mill taken out from the reaction kettle to obtain a grease having a consistency of 276, which was used as a sample.
比較例２ 実施例４と同じ製法で水素化スチレン−イソプレン重合
物（平均分子量65,000）の添加量を20部に、酸変性ポリ
オレフィン（平均分子量3,500）の添加量を30部に変え
て、ちょう度271のグリースを得、試料とした。Comparative Example 2 By the same production method as in Example 4, the addition amount of hydrogenated styrene-isoprene polymer (average molecular weight 65,000) was changed to 20 parts, and the addition amount of acid-modified polyolefin (average molecular weight 3,500) was changed to 30 parts, and the consistency was changed. 271 grease was obtained and used as a sample.
比較例３ 実施例４と同じ製法で製造したが、4,4ジフェニルメタ
ンジイソシアネート29.0部を鉱油450部に撹拌溶解、オ
クチルアミン25.1部を鉱油350.0部に撹拌溶解、ステア
リルアミン5.9部を鉱油445部に撹拌溶解に変更した。水
素化スチレン−イソプレン重合物（平均分子量65,000）
30部に、酸変性ポリオレフィン（平均分子量3500）60部
に変更し、ちょう度270のグリースを得、試料とした。Comparative Example 3 Produced in the same manner as in Example 4, except that 29.0 parts of 4,4 diphenylmethane diisocyanate was dissolved in 450 parts of mineral oil with stirring, 25.1 parts of octylamine was dissolved in 350.0 parts of mineral oil with stirring, and 5.9 parts of stearylamine was dissolved in 445 parts of mineral oil. It was changed to stirring dissolution. Hydrogenated styrene-isoprene polymer (average molecular weight 65,000)
The amount of the acid-modified polyolefin (average molecular weight 3500) was changed to 30 parts and 60 parts to obtain a grease having a consistency of 270 and used as a sample.
比較例４ 実施例６と同じ方法で製法で製造したが、4,4ジフェニ
ルメタンジイソシアネート20.8部を鉱油450部に撹拌溶
解、オクチルアミン18.0部を鉱油350.0部撹拌溶解、ス
テアリルアミン4.2部を鉱油62部に撹拌溶解に変更し
た。水素化スチレン−イソプレン重合物（平均分子量4
5,000）80部、酸変性ポリオレフィン（平均分子量650
0）10部に変更し、ちょう度287のグリースを得、試料と
した。Comparative Example 4 Produced in the same manner as in Example 6, except that 20.8 parts of 4,4 diphenylmethane diisocyanate was dissolved in 450 parts of mineral oil with stirring, 18.0 parts of octylamine was dissolved in 350.0 parts of mineral oil with stirring, and 4.2 parts of stearylamine was 62 parts of mineral oil. It was changed to stirring dissolution. Hydrogenated styrene-isoprene polymer (average molecular weight 4
5,000) 80 parts, acid-modified polyolefin (average molecular weight 650)
0) Change to 10 parts to obtain grease with a consistency of 287 and use it as a sample.
比較例５ 市販ジウレア基グリースでちょう度275のグリースを
得、試料とした。Comparative Example 5 A commercially available diurea-based grease having a consistency of 275 was obtained and used as a sample.
比較例６ 市販ポリウレア基グリースでちょう度291のグリースを
得、試料とした。Comparative Example 6 A commercially available polyurea-based grease having a consistency of 291 was obtained and used as a sample.
比較例７ 市販極圧アルミ複合石けん基グリースでちょう度318の
グリースを得、試料とした。Comparative Example 7 A commercially available extreme pressure aluminum composite soap-based grease was used to obtain a grease having a consistency of 318, which was used as a sample.
比較例８ 市販極圧リチウム基グリースででちょう度275のグリー
スを得、試料とした。Comparative Example 8 A commercially available extreme pressure lithium-based grease having a consistency of 275 was obtained as a sample.
なお実施例１〜６、を通じ、増粘着剤の一部、または全
部をあらかじめ約５〜10倍の鉱油に加熱溶解しておき、
これを冷却工程の適当な時期に加えて製造することも出
来る。この場合4,4ジフェニルメタンジイソシアネー
ト、オクチルアミン、ステアリルアミンを溶解する鉱油
の部数を減じ、鉱油の全部数は変わらないようにする。In addition, through Examples 1 to 6, a part or all of the thickening agent is previously dissolved in about 5 to 10 times mineral oil by heating,
It can also be produced by adding it at an appropriate time during the cooling process. In this case, the number of mineral oils in which 4,4 diphenylmethane diisocyanate, octylamine and stearylamine are dissolved is reduced so that the total number of mineral oils does not change.
叙上の実験例、比較例の各試料グリースについてちょう
度、滴点、離油度、（JIS K 2200）および性能評価試験
を実施した。又実施例１、３及び比較例６、７を内径82
5mm、ころ小端直径30mmの４列円錐ころ軸受を竪型圧延
機に実際に使用し比較した。尚、この軸受けの回転数は
60rpmであった。Consistency, dropping point, oil separation, (JIS K 2200) and performance evaluation tests were carried out on each of the sample greases of the above experimental examples and comparative examples. Further, the inner diameters of Examples 1 and 3 and Comparative Examples 6 and 8 are 82
A 4-row tapered roller bearing with a diameter of 5 mm and a small end diameter of 30 mm was actually used in a vertical rolling mill for comparison. The rotation speed of this bearing is
It was 60 rpm.
1.ちょう度、滴点、離油度試験。1. Consistency, dropping point, oil separation test.
JIS K 2220に従って試験を行った。その結果を第１表に
示す。ちょう度は試料が長期使用に適している２号ちょ
う度としたので、比較例７を除き全試料共２号ちょう度
とした。The test was conducted according to JIS K 2220. The results are shown in Table 1. Since the consistency was set to the No. 2 consistency, which is suitable for long-term use, all samples except Comparative Example 7 were the No. 2 consistency.
適点は比較例８以外260℃以上で耐高温性が優れている
と判断される。比較例８の188℃はリチウム系の通常値
である。離油度は全試料共2.0％以下でグリースからの
油分離が少なく実施例は特に優れている。Except for Comparative Example 8, the appropriate point is judged to be excellent in high temperature resistance at 260 ° C. or higher. 188 ° C. in Comparative Example 8 is a normal value for lithium. The degree of oil separation is 2.0% or less for all the samples, and the oil separation from the grease is small, and the examples are particularly excellent.
2.シェルロールテスト ASTM-D1831のシェルロール試験機を用い80℃で24時間試
験し、試験前後のちょう度変化の大きさにより機械安定
性の良否を調べた。その結果を表に示す。特に軟化及び
硬化しないグリースがよい。定説はないが、No.2ちょう
度グリースの試験後の変化が70未満であれば良いと考え
られる。2. Shell roll test A shell roll tester of ASTM-D1831 was used to perform a test for 24 hours at 80 ° C, and the quality of mechanical stability was examined by the magnitude of the consistency change before and after the test. The results are shown in the table. A grease that does not soften or harden is particularly preferable. Although there is no dogma, it is considered that the change of No. 2 consistency grease after the test is less than 70.
比較例３、４などの増ちょう剤が少なく、増粘着剤の多
いグリースは軟化程度が大きくグリースの長期使用に対
して不十分とみとめられる。Greases such as Comparative Examples 3 and 4 which have a small amount of a thickening agent and a large amount of a thickening agent have a large degree of softening and are considered insufficient for long-term use of the grease.
また増粘着剤（１）の比率を多く添加したものは軟化す
る傾向が強い。Further, the one containing a large proportion of the tackifier (1) has a strong tendency to be softened.
3.付着性垂れ落ち試験 厚さ3mm、300mm角の鉄板に10mmの厚みで30mmφ径のグリ
ースを張り付けた後、垂直に立て80℃の恒温槽に入れ垂
れ落ち性を調べた。200mm落下するまでの時間で評価し
た。実施例１〜６と比較例４は120分以上であり、他の
比較例１〜３、５〜８より非常に垂れ落ちないグリース
であった。3. Adhesion dripping test: A 3 mm thick, 300 mm square iron plate was pasted with grease with a diameter of 30 mm and a thickness of 10 mm, and then it was placed vertically and placed in an 80 ° C thermostat to check the dripping property. It was evaluated by the time until it dropped 200 mm. The grease of Examples 1 to 6 and Comparative Example 4 was 120 minutes or longer, and was a grease that did not droop down more than other Comparative Examples 1 to 3 and 5 to 8.
4.軸受内グリース保持性試験 急勾配型円錐ころ軸受け（内径70mm、外径150mm、幅38m
m）の外輪を軸受箱に固定し、内輪を２個の支持軸受で
支えられた回転軸に固く嵌め込み、軸受に60±1gの供試
グリースを充填した後、3000Kgのスラスト荷重を加え75
0rpmで回転試験を行った。4. Bearing grease retention test Steep taper roller bearing (70mm inside diameter, 150mm outside diameter, 38m width)
After fixing the outer ring of (m) to the bearing box and fitting the inner ring firmly to the rotating shaft supported by two supporting bearings, fill the bearing with 60 ± 1g of the test grease and add a thrust load of 3000Kg to 75
A rotation test was performed at 0 rpm.
この回転速度は実装置圧延機の大型軸受の周速とほぼ等
しくやや上回る周速を与えるものであり、スラスト荷重
は実装置大型軸受の最高使用温度レベルである70℃〜80
℃と、この保持性試験の温度をほぼ同レベルにするため
に定めたものである。またグリース充填量は軸受ころ保
持器幅間の空間容積のほぼ85％に相当する量である。こ
の回転速度、荷重、温度条件で軸受を回転すると、充填
されたグリースは内輪ところの回転により混和されると
共に温度上昇により流動しやすくなり、遠心力により軸
受のころ大端側から押し出される。この状況は実装置軸
受の場合と同様であり、軸受内に残存保持される割合の
多いグリースほど、実装置軸受けでも垂れおちて失われ
ることが少ないと判断できる。This rotation speed gives a peripheral speed that is almost equal to and slightly higher than the peripheral speed of the large bearing of the actual equipment rolling mill, and the thrust load is 70 ° C to 80 ° C, which is the maximum operating temperature level of the large bearing of the actual equipment.
This is set so that the temperature of this retention test is approximately the same as the temperature of ° C. The grease filling amount is equivalent to about 85% of the space volume between the bearing roller cage widths. When the bearing is rotated under the rotational speed, load, and temperature conditions, the filled grease is mixed by the rotation of the inner ring and easily flows due to the temperature rise, and the grease is pushed out from the roller large end side of the bearing by the centrifugal force. This situation is the same as in the case of the actual device bearing, and it can be determined that the more grease that is retained and retained in the bearing, the less the grease drops and is lost even in the actual device bearing.
10時間回転試験を行った後、主な実施例グリースおよび
比較例グリースについて軸受け内保持性を示すグリース
残存率を比較して表の下部に示した。After the rotation test for 10 hours, the residual grease ratios showing the retention in the bearing of the main example grease and the comparative example grease were compared and shown in the lower part of the table.
実施例１〜４は保持性が比較例５〜８などの約２〜３倍
になる実験結果が得られ短時間の評価ではあるがこの結
果は次の5.に示す実圧延機軸受けでのテスト結果とも第
１図に示すごとく、よく相関することが分かった。In Examples 1 to 4, an experimental result in which the retention property is about 2 to 3 times that of Comparative Examples 5 to 8 is obtained, which is an evaluation in a short time, but this result is obtained in the actual rolling mill bearing shown in the following 5. As shown in FIG. 1, it was found that the test results also correlate well.
5.実圧延機によるテスト 製鉄所の圧延機軸受けの定期点検時、実施例１、３、比
較例６、７の試料をそれぞれ１組の軸受けに16kg充填し
テストした。5. Test with an actual rolling mill At the time of periodic inspection of rolling mill bearings at an iron mill, 16 kg of each of the samples of Examples 1 and 3 and Comparative Examples 6 and 7 was filled in a set of bearings and tested.
比較例７は従来より使用していたもので、１ケの軸受に
時間毎に30g補給補充していたが、14日後軸受けを分解
点検した。軸受け上部はグリースが非常に少ない状態で
あった。又かなりの頻度で軸受にフレーキングなどの損
傷が経験されている。実施例１、３、比較例６を初充填
の16kgのみで、10日間連続運転したが、実施例１は軸受
けのころ全面にグリースが付着しており、軸受け金属面
が見えない状態で、さらにそのまま使用出来る状態であ
った。さらに30日目、60日目に分解点検したが使用可能
であった。実施例３は150日間（累計圧延量45万屯×３
回＝125万屯相当）使用出来た。比較例５は15日目の分
解点検で軸受け転送面の外側、間座にグリースが溜ま
り、転走面には少ない状態であった。そのまま使用する
には少々不安の状態と判断された。In Comparative Example 7, which had been used conventionally, 30 g was replenished and replenished to one bearing every hour, but the bearing was disassembled and inspected after 14 days. The upper part of the bearing was very low in grease. Also, the bearing is frequently damaged such as flaking. In Examples 1 and 3 and Comparative Example 6, only 16 kg of the initial filling was continuously operated for 10 days. In Example 1, grease was adhered to the entire surface of the bearing, and the metal surface of the bearing was invisible. It was ready to use. Furthermore, it was usable after being overhauled on the 30th and 60th days. Example 3 is 150 days (cumulative rolling amount 450,000 tons x 3
Times = 1.25 million tons) In Comparative Example 5, the grease was accumulated on the outside of the bearing transfer surface and on the spacer during the overhaul on the 15th day, and the amount of grease on the rolling surface was small. It was judged to be a little uneasy to use as it is.
発明の効果 本発明のグリース組成物は垂れ性試験の結果より非常に
垂れにくい事が分かり、又軸受内保持性試験でも良好で
あり、さらに実機テストでも頭記の用途に対し、垂れな
くて軸受けに良く付着する非常に優秀な性能のグリース
組成物であり、軸受損傷の防止、使用量の低減、メンテ
ナンスの軽減に有効であることが証明された。 The effect of the invention shows that the grease composition of the present invention is very unlikely to drip from the results of the dripping test, and is also good in the retention test in bearings. It is a grease composition with excellent performance that adheres well to, and has been proved to be effective in preventing bearing damage, reducing the amount used, and reducing maintenance.
第１図は軸受内残量と初充填のみで運転できた回数の相
関を示すグラフである。FIG. 1 is a graph showing the correlation between the remaining amount in the bearing and the number of times operation was possible only with initial filling.
───────────────────────────────────────────────────── 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 115:08 143:18 143:08） Ｃ１０Ｎ 20:02 20:04 30:02 40:02 50:10 60:04 (72)発明者 佐々木 中道 山口県下関市彦島弟子待町１―８―１ 日 本グリース株式会社下関工場内 (72)発明者 有冨 耕一郎 大阪府大阪市北区茶屋町18−21 日本グリ ース株式会社内 (56)参考文献 特開 平２−80493（ＪＰ，Ａ) 特開 昭58−125794（ＪＰ，Ａ)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location C10M 115: 08 143: 18 143: 08) C10N 20:02 20:04 30:02 40:02 50 : 10 60:04 (72) Inventor Nakamichi Sasaki 1-8-1, Hikoshima Teshi-machi, Shimonoseki City, Yamaguchi Prefecture Nihon Grease Co., Ltd. Shimonoseki Plant (72) Inventor Koichiro Aritomi 18 Chajayacho, Kita-ku, Osaka-shi, Osaka -21 Japan Grease Co., Ltd. (56) Reference JP-A-2-80493 (JP, A) JP-A-58-125794 (JP, A)
Claims (2)
と、この鉱油100重量％に対して、４〜12重量％のウレ
ア系増ちょう剤と、３〜６重量％の平均分子量20,000〜
100,000の水素化スチレン−イソプレン共重合体と、平
均分子量1,500〜5,000の酸化変性ポリオレフィンとを主
成分とし、前記水素化スチレン−イソプレン共重合体と
酸化変性ポリオレフィンとを合計量で４〜８重量％含有
せしめ且つこの合計量に対する前記水素化スチレン−イ
ソプレン共重合体の配合割合を50〜86％にしたことを特
徴とする大型竪型ころ軸受用ウレアグリース組成物。1. A mineral oil having a viscosity of 10 to 35 cSt at 100 ° C. as a base oil, 4 to 12% by weight of a urea thickener with respect to 100% by weight of this mineral oil, and an average molecular weight of 3 to 6% by weight. 20,000 ~
The main component is 100,000 hydrogenated styrene-isoprene copolymer and an oxidation-modified polyolefin having an average molecular weight of 1,500 to 5,000, and the total amount of the hydrogenated styrene-isoprene copolymer and the oxidation-modified polyolefin is 4 to 8% by weight. A urea grease composition for large vertical roller bearings, characterized in that the hydrogenated styrene-isoprene copolymer is contained in an amount of 50 to 86% with respect to the total amount.
と、この鉱油100重量％に対して、４〜12重量％のウレ
ア系増ちょう剤と、３〜６重量％の平均分子量20,000〜
100,000の水素化スチレン−イソプレン共重合体と、平
均分子量1,500〜5,000の酸変性ポリオレフィンとを主成
分とし、前記水素化スチレン−イソプレン共重合体と酸
変性ポリオレフィンとを合計量で４〜８重量％含有せし
め且つこの合計量に対する前記水素化スチレン−イソプ
レン共重合体の配合割合を50〜86％にしたことを特徴と
する大型竪型ころ軸受用ウレアグリース組成物。2. A mineral oil having a viscosity of 10 to 35 cSt at 100 ° C. as a base oil, 4 to 12% by weight of a urea thickener, and 3 to 6% by weight of an average molecular weight based on 100% by weight of the mineral oil. 20,000 ~
A hydrogenated styrene-isoprene copolymer of 100,000 and an acid-modified polyolefin having an average molecular weight of 1,500 to 5,000 are main components, and the hydrogenated styrene-isoprene copolymer and the acid-modified polyolefin are 4 to 8% by weight in total. A urea grease composition for large vertical roller bearings, characterized in that the hydrogenated styrene-isoprene copolymer is contained in an amount of 50 to 86% with respect to the total amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2269502A JPH0768537B2 (en) | 1990-10-09 | 1990-10-09 | Urea grease composition for large vertical roller bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2269502A JPH0768537B2 (en) | 1990-10-09 | 1990-10-09 | Urea grease composition for large vertical roller bearings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04146996A JPH04146996A (en) | 1992-05-20 |
| JPH0768537B2 true JPH0768537B2 (en) | 1995-07-26 |
Family
ID=17473320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2269502A Expired - Lifetime JPH0768537B2 (en) | 1990-10-09 | 1990-10-09 | Urea grease composition for large vertical roller bearings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0768537B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002327188A (en) * | 2001-04-27 | 2002-11-15 | Kanto Kasei Kogyo Kk | Oil nonseparating lubricant composition |
| JP5383392B2 (en) * | 2009-08-31 | 2014-01-08 | コスモ石油ルブリカンツ株式会社 | Grease composition |
| JP7075877B2 (en) * | 2018-12-27 | 2022-05-26 | 株式会社イチネンケミカルズ | Grease composition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58125794A (en) * | 1982-01-21 | 1983-07-26 | Showa Shell Sekiyu Kk | Lithium complex grease composition with high dropping point, having improved acoustic characteristics |
| JPH0776353B2 (en) * | 1988-09-16 | 1995-08-16 | 日本グリース株式会社 | Urea grease composition for tapered roller bearings |
-
1990
- 1990-10-09 JP JP2269502A patent/JPH0768537B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04146996A (en) | 1992-05-20 |
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