JP2864473B2 - Urea grease composition - Google Patents
Urea grease compositionInfo
- Publication number
- JP2864473B2 JP2864473B2 JP4194946A JP19494692A JP2864473B2 JP 2864473 B2 JP2864473 B2 JP 2864473B2 JP 4194946 A JP4194946 A JP 4194946A JP 19494692 A JP19494692 A JP 19494692A JP 2864473 B2 JP2864473 B2 JP 2864473B2
- Authority
- JP
- Japan
- Prior art keywords
- grease
- group
- urea
- nhconhr
- thickener
- 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
- Lubricants (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、増ちょう剤として２種
類のジウレア化合物を併合したウレアグリース組成物に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a urea grease composition in which two types of diurea compounds are combined as a thickener.
【０００２】[0002]
【従来技術】近年、自動車や鉄鋼等の各種産業界では、
機械技術の進歩が著しく、各種機械部品の小型化、軽量
化および高性能化が進み、潤滑箇所が高温となる傾向に
ある。このため、耐熱性や酸化安定性に優れたウレア系
グリースがその使用量の削減や機械寿命の延長に効果的
なことから徐々にその用途を広げている。特開平１−２
８４５９１号の技術は、増ちょう剤としてのジウレア化
合物を開示しており、このジウレア化合物は２価のジフ
ェニルメタン基の一方には炭素数３〜４のアルキル基
を、もう一方には炭素数１６〜１８のアルキル基を有す
るものである。特開平１−２６８７９３号の技術も、増
ちょう剤としてのジウレア化合物を使用するが、このジ
ウレア化合物は２価のジフェニルメタン基の両端にはオ
クタデシル基、オクチル基、ドデシル基よりなる群から
選ばれた基が結合しており、かつそのオクタデシル基の
モル比率を２０〜８０モル％としたものである。特開平
１−１３９６９６号は、増ちょう剤としてジフェニルメ
タンの両端に尿素結合をもつタイプのジウレア化合物
と、トリレン基またはビトリレン基の両端に尿素結合を
もつタイプのジウレア化合物とを併用する技術に関する
ものであるが、尿素結合を介してジフェニルメタン基に
結合しているアルキルは炭素数８のものに限られてお
り、また尿素結合を介してトリレン基またはビトリレン
基に結合している基は芳香族基に限られていた。特開平
２−７７４９４号は、増ちょう剤としてジフェニルメタ
ンの両端に尿素結合をもつタイプのジウレア化合物と、
ビトリレン基の両端に尿素結合をもつタイプのジウレア
化合物とを併用する技術に関するものである。特公昭６
３−２６７９８号の技術は、三種類のジウレア化合物を
併用するものであるが、２つの尿素結合にはさまれた基
はいずれも同じ基が使用されており、１つの化合物は両
端の基がドデシルのもの、１つの化合物は１端がドデシ
ルで、他端がオクチルのもの、もう１つの化合物は両端
がオクチルのものを組合せて使用するものである。特開
昭５８−１８５６９３号の技術は、ジウレア系グリース
にアルケニルこはく酸アミド、アルキルベンゼンスルホ
ン酸金属塩、石油スルホン酸金属塩などを添加して音響
特性を改善するものであるが、ジウレアについてはとく
に特色はない。2. Description of the Related Art In recent years, in various industries such as automobiles and steel,
The mechanical technology has been remarkably advanced, and various types of mechanical parts have been reduced in size, weight, and performance, and lubricated parts tend to be hot. For this reason, urea-based greases having excellent heat resistance and oxidation stability are effective in reducing the amount of use and extending the service life of the urea grease. JP-A 1-2
No. 84591 discloses a diurea compound as a thickener, and the diurea compound has an alkyl group having 3 to 4 carbon atoms in one of divalent diphenylmethane groups and a divalent compound having 16 to 16 carbon atoms in the other. It has 18 alkyl groups. The technique of JP-A-1-268793 also uses a diurea compound as a thickener, and this diurea compound is selected from the group consisting of an octadecyl group, an octyl group and a dodecyl group at both ends of a divalent diphenylmethane group. Groups are bonded, and the molar ratio of the octadecyl group is 20 to 80 mol%. JP-A-1-139696 relates to a technique in which a diurea compound having a urea bond at both ends of diphenylmethane and a diurea compound having a urea bond at both ends of a tolylene group or a vitrilene group are used in combination as a thickener. However, the alkyl bonded to the diphenylmethane group via the urea bond is limited to those having 8 carbon atoms, and the group bonded to the tolylene group or the vitrilen group via the urea bond is an aromatic group. Was limited. JP-A-2-77494 discloses a diurea compound having a urea bond at both ends of diphenylmethane as a thickener,
The present invention relates to a technique in which a diurea compound having a urea bond at both ends of a bitrylene group is used in combination. Tokunosho 6
The technique of 3-26798 uses three kinds of diurea compounds in combination, but the same group is used for all groups sandwiched between two urea bonds, and one compound has two groups at both ends. One compound is dodecyl, one compound is dodecyl at one end and the other end is octyl, and the other compound is a combination of those having octyl at both ends. The technique of JP-A-58-185693 is to improve acoustic characteristics by adding alkenyl succinamide, metal salt of alkyl benzene sulfonic acid, metal salt of petroleum sulfonic acid and the like to diurea grease. There is no feature.
【０００３】[0003]
【目的】本発明の第一の目的は、少量の増ちょう剤で所
望のちょう度が得られ、かつ機械的安定性、耐水性、圧
送性および音響特性に優れたウレアグリースを提供する
点にある。本発明の第二の目的は、特開平１−１３９６
９６号の技術を拡張、改良する点にある。A first object of the present invention is to provide a urea grease which can obtain a desired consistency with a small amount of a thickener and is excellent in mechanical stability, water resistance, pumpability and acoustic properties. is there. A second object of the present invention is to
No.96 technology is to be expanded and improved.
【０００４】[0004]
【構成】本発明は、一般式 （ａ）Ｒ1ＮＨＣＯＮＨＲ2ＮＨＣＯＮＨＲ3 （式中、Ｒ2はトリレン基、Ｒ1とＲ3は炭素数１６〜１
８の直鎖状または分岐状の飽和または不飽和のアルキル
基である）で示されるジウレア化合物および （ｂ）Ｒ4ＮＨＣＯＮＨＲ5ＮＨＣＯＮＨＲ6 （式中、Ｒ5はジフェニルメタン基、Ｒ4とＲ6は炭素数
８の直鎖または分岐の飽和アルキル基である）で示され
るジウレア化合物よりなる混合物であって、（ａ）に対
する（ｂ）の割合が２０〜９０モル％である増ちょう剤
を、鉱油および／または合成油よりなる基油に対し、２
〜２０重量％含有させたことを特徴とするウレア系グリ
ース組成物に関する。The present invention relates to a compound represented by the following general formula (a): R 1 NHCONHR 2 NHCONHR 3 (wherein R 2 is a tolylene group, and R 1 and R 3 are C 16 to C 1
(B) R 4 NHCONHR 5 NHCONHR 6 (wherein R 5 is a diphenylmethane group, and R 4 and R 6 are A thickener having a ratio of (b) to (a) of from 20 to 90 mol%, which is a mineral oil. And / or a base oil of synthetic oil
To a urea-based grease composition characterized in that the urea-based grease composition contains about 20% by weight.
【０００５】（ａ）成分は、トリレンジイソシアネート
とヘキサデシルアミン、ヘプタデシルアミン、および／
またはオクタデシルアミンを反応させることにより得る
ことができる。トリレンジイソシアネートは２，４−ト
リレンジイソシアネート、２，６−トリレンジイソシア
ネートおよびこれらの混合物などが使用できる。 （ｂ）成分は、ジフェニルメタンジイソシアネートとオ
クチルアミンとを反応させることにより得られる。The component (a) comprises tolylene diisocyanate and hexadecylamine, heptadecylamine, and / or
Alternatively, it can be obtained by reacting octadecylamine. As tolylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, a mixture thereof and the like can be used. The component (b) is obtained by reacting diphenylmethane diisocyanate with octylamine.
【０００６】[0006]
【実施例】以下、実施例を掲げて本発明を説明する。ま
た比較例を併記し、本発明のウレアグリースの特性を明
らかにした。 実施例１〜７ 表に示す配合割合にて成分（ａ）のジイソシアネートと
６０重量部の基油とをグリース釜に入れ、約８０℃に加
熱し、ジイソシアネートを溶解した後、これに２０重量
部の基油に溶解させた成分（ａ）のｎ−オクタデシルア
ミンを徐々に加えて激しく撹拌する。約１０分後、成分
（ｂ）のジフェニルメタン４，４′−ジイソシアネート
を加えたのちに２０重量部の基油に溶解させたｎ−オク
チルアミンを加え撹拌を続ける。ジイソシアネートとア
ミンとの反応により温度は上昇するが約３０分間この状
態で撹拌後、１７０℃まで加熱して反応を完結させる。
その後、室温まで放冷し、混練してグリースを作った。
実施例に示す鉱油の粘度は１１ｃｓｔ（１００℃）であ
り、ポリα−オレフィン油は１２ｃｓｔ（１００℃）で
ある。各実施例のグリースのちょう度、滴点、シェルロ
ール（１５０℃、２４ｈ）および１８０℃における加熱
後ちょう度（２５℃、不混和）並びに音響試験の結果を
表に示した。なお、音響試験は特公昭５３−２３５７号
記載の方法により測定した。 比較例１〜２ 表に示す配合割合にてジイソシアネートと鉱油の８０重
量部とをグリース釜に入れ、約８０℃に加熱し、ジイソ
シアネートを溶解した後、２０重量部の鉱油に溶解させ
たアミンを加え撹拌した。約３０分間この状態で撹拌を
続けた後、約１７０℃まで加熱し反応を完結させ、室温
に放冷後、混練してグリースを作った。各比較例の性状
を表に示した。 （以下余白）The present invention will be described below with reference to examples. The properties of the urea grease of the present invention were clarified together with comparative examples. Examples 1 to 7 The diisocyanate of the component (a) and 60 parts by weight of the base oil were placed in a grease kettle at the mixing ratio shown in the table, heated to about 80 ° C., and the diisocyanate was dissolved. The n-octadecylamine of the component (a) dissolved in the base oil is slowly added and stirred vigorously. After about 10 minutes, diphenylmethane 4,4'-diisocyanate of component (b) is added, and then n-octylamine dissolved in 20 parts by weight of base oil is added and stirring is continued. The temperature rises due to the reaction between the diisocyanate and the amine, but after stirring for about 30 minutes in this state, the reaction is completed by heating to 170 ° C.
Then, it was allowed to cool to room temperature and kneaded to produce grease.
The viscosity of the mineral oil shown in the examples is 11 cst (100 ° C.), and that of the poly-α-olefin oil is 12 cst (100 ° C.). Tables show the consistency, drop point, consistency of the shell roll (150 ° C., 24 hours), the consistency after heating at 180 ° C. (25 ° C., immiscible), and the results of the acoustic test of each example. The acoustic test was measured by the method described in JP-B-53-2357. Comparative Examples 1 and 2 Diisocyanate and 80 parts by weight of mineral oil in the mixing ratio shown in the table were put in a grease kettle, heated to about 80 ° C., and the diisocyanate was dissolved. Then, the amine dissolved in 20 parts by weight of mineral oil was dissolved. Added and stirred. After stirring was continued for about 30 minutes in this state, the mixture was heated to about 170 ° C. to complete the reaction, allowed to cool to room temperature, and kneaded to form a grease. The properties of each comparative example are shown in the table. (Below)
【０００７】[0007]
【表１】 [Table 1]
【０００８】[0008]
【表２】 ＊比較例における2.4/2.6の割合は65％／35％である。 ちょう度：ＪＩＳ ２２２０ シェルロール：ＡＳＴＭ Ｄ１８３１に準拠 音響試験：特公昭５３−２３５７号記載の方法による。[Table 2] * The ratio of 2.4 / 2.6 in the comparative example is 65% / 35%. Consistency: JIS 2220 Shell roll: Conforms to ASTM D1831 Acoustic test: According to the method described in JP-B-53-2357.
【０００９】実施例８、比較例３〜５ 実施例８として実施例６に酸化防止剤、防錆剤および極
圧剤を加えたグリースをつくり、市販のグリースと性状
を比較した結果をつぎの表に示した。本発明グリース
は、市販のグリースよりも機械的安定性、耐水性、耐熱
性および圧送性に優れている。Example 8, Comparative Examples 3 to 5 As Example 8, a grease was prepared by adding an antioxidant, a rust inhibitor and an extreme pressure agent to Example 6, and the properties were compared with those of a commercially available grease. It is shown in the table. The grease of the present invention has better mechanical stability, water resistance, heat resistance and pumpability than commercially available grease.
【表３】 （注） 比較例３：市販ウレア系グリース 比較例４：市販リチウム石鹸グリース 比較例５：カルシウムコンプレックス系グリース[Table 3] (Note) Comparative Example 3: Commercially available urea grease Comparative Example 4: Commercially available lithium soap grease Comparative Example 5: Calcium complex grease
【００１０】比較例６〜１０ 特開平１−１３９６９６号の実施例１〜４および９のデ
ータを比較例６〜１０として示す。Comparative Examples 6 to 10 The data of Examples 1 to 4 and 9 of JP-A-1-139696 are shown as Comparative Examples 6 to 10.
【表４】 この表からみて、本発明が特開平１−１３９６９６号の
発明に較べて総合的に音響効果がさらに改良されている
ことが明らかであろう。さらに本発明によれば少ない増
ちょう剤量で硬いグリースが得られる。いいかえれば、
ちょう度収率が優れていることが明白である。このよう
に本発明のウレア系グリース組成物は、音響特性の改善
のみならず、ちょう度収率に優れ、しかも耐水性や常温
から高温における機械的安定性に優れたグリースを提供
することができる。[Table 4] From this table, it will be apparent that the present invention has an overall improved sound effect as compared with the invention of JP-A-1-139696. Further, according to the present invention, a hard grease can be obtained with a small amount of the thickener. In other words,
It is clear that the consistency yield is excellent. As described above, the urea-based grease composition of the present invention can provide not only an improvement in acoustic characteristics but also an excellent consistency yield, and a grease excellent in water resistance and mechanical stability at room temperature to high temperature. .
【００１１】[0011]
【効果】本発明は、新しい増ちょう剤の配合を提示する
ことにより、技術を豊富化するとともに、先行技術であ
る特開平１−１３９６９６号の主課題である音響特性を
一層改善することができた。しかも、本発明のグリース
は、高温における機械的安定性にすぐれ、熱硬化性が非
常に少ない。According to the present invention, by presenting a new thickener composition, the technology can be enriched and the acoustic characteristics, which is the main problem of the prior art, JP-A-1-139696, can be further improved. Was. In addition, the grease of the present invention has excellent mechanical stability at high temperatures and very little thermosetting.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−128993（ＪＰ，Ａ) 特開 平２−77494（ＪＰ，Ａ) 特開 平１−139696（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C10M 115/08 C10N 50:10────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-3-128993 (JP, A) JP-A-2-77494 (JP, A) JP-A-1-139696 (JP, A) (58) Field (Int.Cl. 6 , DB name) C10M 115/08 C10N 50:10
Claims (1)
８の直鎖状または分岐状の飽和または不飽和のアルキル
基である）で示されるジウレア化合物および （ｂ）Ｒ4ＮＨＣＯＮＨＲ5ＮＨＣＯＮＨＲ6 （式中、Ｒ5はジフェニルメタン基、Ｒ4とＲ6は炭素数
８の直鎖または分岐の飽和アルキル基である）で示され
るジウレア化合物よりなる混合物であって、（ａ）に対
する（ｂ）の割合が２０〜９０モル％である増ちょう剤
を、鉱油および／または合成油よりなる基油に対し、２
〜２０重量％含有させたことを特徴とするウレア系グリ
ース組成物。1. A compound represented by the general formula (a): R 1 NHCONHR 2 NHCONHR 3 (wherein R 2 is a tolylene group, and R 1 and R 3 are C 16 to C 1 )
(B) R 4 NHCONHR 5 NHCONHR 6 (wherein R 5 is a diphenylmethane group, and R 4 and R 6 are A thickener having a ratio of (b) to (a) of from 20 to 90 mol%, which is a mineral oil. And / or a base oil of synthetic oil
A urea-based grease composition, characterized in that it contains -20% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4194946A JP2864473B2 (en) | 1992-06-29 | 1992-06-29 | Urea grease composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4194946A JP2864473B2 (en) | 1992-06-29 | 1992-06-29 | Urea grease composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0617080A JPH0617080A (en) | 1994-01-25 |
| JP2864473B2 true JP2864473B2 (en) | 1999-03-03 |
Family
ID=16332964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4194946A Expired - Lifetime JP2864473B2 (en) | 1992-06-29 | 1992-06-29 | Urea grease composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2864473B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6919301B2 (en) | 2001-10-16 | 2005-07-19 | Nsk Ltd. | Grease composition and rolling apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023199911A1 (en) * | 2022-04-11 | 2023-10-19 | 協同油脂株式会社 | Grease composition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0692592B2 (en) * | 1987-11-26 | 1994-11-16 | 昭和シェル石油株式会社 | Urea grease composition |
| JP2777928B2 (en) * | 1989-07-07 | 1998-07-23 | 日本石油株式会社 | Diurea grease composition |
-
1992
- 1992-06-29 JP JP4194946A patent/JP2864473B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6919301B2 (en) | 2001-10-16 | 2005-07-19 | Nsk Ltd. | Grease composition and rolling apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0617080A (en) | 1994-01-25 |
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