JP2024034708A - Heat-resistance grease - Google Patents
Heat-resistance grease Download PDFInfo
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- JP2024034708A JP2024034708A JP2022139150A JP2022139150A JP2024034708A JP 2024034708 A JP2024034708 A JP 2024034708A JP 2022139150 A JP2022139150 A JP 2022139150A JP 2022139150 A JP2022139150 A JP 2022139150A JP 2024034708 A JP2024034708 A JP 2024034708A
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- 239000004519 grease Substances 0.000 title claims abstract description 62
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002562 thickening agent Substances 0.000 claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 17
- 239000002199 base oil Substances 0.000 claims description 30
- 239000003921 oil Substances 0.000 claims description 27
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 claims description 8
- 239000010696 ester oil Substances 0.000 claims description 6
- 150000002366 halogen compounds Chemical class 0.000 claims description 6
- 229920005862 polyol Polymers 0.000 claims description 6
- 150000003077 polyols Chemical class 0.000 claims description 4
- 238000000926 separation method Methods 0.000 abstract description 17
- 230000001050 lubricating effect Effects 0.000 abstract description 7
- 238000011156 evaluation Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 150000002222 fluorine compounds Chemical class 0.000 description 4
- -1 for example Substances 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920013639 polyalphaolefin Polymers 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010702 perfluoropolyether Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- HBEXMKJUVPFPEZ-UHFFFAOYSA-N isocyanic acid;1,3,5-triazine-2,4,6-triamine Chemical compound N=C=O.NC1=NC(N)=NC(N)=N1 HBEXMKJUVPFPEZ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000006078 metal deactivator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
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- Lubricants (AREA)
Abstract
Description
本発明は、耐熱グリースに関し、特に増ちょう剤としてメラミンシアヌレートを含む耐熱グリースに関する。 The present invention relates to a heat-resistant grease, and particularly to a heat-resistant grease containing melamine cyanurate as a thickener.
グリースは増ちょう剤、基油が主成分であり各々の種類によって分類される。耐熱グリースとして、例えば増ちょう剤の種類にはウレアもしくはリチウム、カルシウムやバリウム等の複合型金属石鹸が、基油にはエステル油やポリアルファオレフィン油が一般的に用いられており、優れた耐熱性、低温性や潤滑性から車載製品や家電製品を含み幅広い分野で使用されている。 Grease has thickeners and base oil as its main components, and is classified according to each type. As heat-resistant grease, for example, thickeners such as urea or lithium, composite metal soaps such as calcium and barium are generally used, and base oils are ester oils and polyalphaolefin oils, which have excellent heat resistance. It is used in a wide range of fields, including automotive products and home appliances, due to its low-temperature properties, low-temperature properties, and lubricity.
耐熱グリースとして、増ちょう剤がポリテトラフルオロエチレンと基油がパーフルオロポリエーテル油からなるフッ素グリースが知られており、極めて優れた耐熱性から特に厳しい高温環境下での要求事項を満足させうる性能を有する。（例えば特許文献１および２） As a heat-resistant grease, fluorinated grease is known, which is made of polytetrafluoroethylene as a thickener and perfluoropolyether oil as a base oil.It has extremely excellent heat resistance and can meet the requirements in particularly severe high-temperature environments. Has performance. (For example, Patent Documents 1 and 2)
しかしながら、上述のような、特許文献１または２に記載の耐熱グリースであっても、１３０℃以上の使用環境下においては、増ちょう剤や基油の熱劣化によるグリースの変質が起こるという欠点を有していた。 However, even the heat-resistant grease described in Patent Documents 1 and 2, as mentioned above, has the disadvantage that the grease deteriorates due to thermal deterioration of the thickener and base oil when used in an environment of 130°C or higher. had.
そこで、本発明の主たる目的は、離油度、摩擦特性、低温性といった潤滑グリースに必要な特性について、従来の耐熱グリースと同等以上の特性を有しつつ、１３０℃以上の使用環境下における耐熱性について、従来の耐熱グリース以上の特性を有する耐熱グリースを提供することである。 Therefore, the main purpose of the present invention is to have properties required for lubricating grease such as oil separation, friction properties, and low-temperature properties that are equivalent to or better than conventional heat-resistant greases, while also providing heat resistance in use environments of 130°C or higher. The object of the present invention is to provide a heat-resistant grease that has better properties than conventional heat-resistant greases.
本発明者らは、上記目的の実現に向け鋭意検討した。その結果、特定の平均粒子径を有するメラミンシアヌレートを増ちょう剤として含む耐熱グリースが、離油度、摩擦特性、低温性といった潤滑グリースに必要な特性について、従来の耐熱グリースと同等以上の特性を有しつつ、１３０℃以上の使用環境下における耐熱性について、従来の耐熱グリース以上の特性を有することを見出し、本発明を完成するに至った。 The present inventors have made extensive studies to achieve the above object. As a result, heat-resistant grease containing melamine cyanurate as a thickener with a specific average particle size has properties equivalent to or better than conventional heat-resistant grease in terms of properties required for lubricating grease such as oil separation, friction properties, and low-temperature properties. The present inventors have discovered that the grease has properties superior to conventional heat-resistant greases in terms of heat resistance under usage environments of 130° C. or higher, and has completed the present invention.
すなわち、本発明の耐熱グリースは、平均粒子径が２μｍ以下であるメラミンシアヌレートを増ちょう剤として含むことを特徴とする。ここで、平均粒子径とは、レーザー回折光散乱法による粒度分布測定において、体積基準による累積粒度分布のＤ５０（メジアン径）である。この測定器としては、例えば（株）堀場製作所製のレーザー回折／散乱式粒子分布測定装置ＬＡ－９５０Ｓ２がある。 That is, the heat-resistant grease of the present invention is characterized by containing melamine cyanurate having an average particle size of 2 μm or less as a thickener. Here, the average particle diameter is D50 (median diameter) of a volume-based cumulative particle size distribution in particle size distribution measurement using a laser diffraction light scattering method. An example of this measuring device is a laser diffraction/scattering particle distribution measuring device LA-950S2 manufactured by Horiba, Ltd.
また、本発明の耐熱グリースは、メラミンシアヌレートを耐熱グリースの中に２０～５０質量％含むことが好ましく、また、基油にハロゲン系化合物を含まないことが好ましく、また、基油にフェニルエーテル油またはポリオールエステル油のいずれか一方を少なくとも含むことが好ましく、さらにまた、４０℃における基油の粘度が８０ｍｍ２／ｓ以上であることが好ましい。 Further, the heat-resistant grease of the present invention preferably contains 20 to 50% by mass of melamine cyanurate in the heat-resistant grease, and also preferably contains no halogen compounds in the base oil, and also preferably contains phenyl ether in the base oil. It is preferable that the base oil contains at least either oil or polyol ester oil, and furthermore, it is preferable that the viscosity of the base oil at 40° C. is 80 mm 2 /s or more.
本発明によれば、離油度、摩擦特性、低温性といった潤滑グリースに必要な特性について、従来の耐熱グリースと同等以上の特性を有しつつ、１３０℃以上の使用環境下における耐熱性について、従来の耐熱グリース以上の特性を有する耐熱グリースを提供することができる。 According to the present invention, the properties necessary for a lubricating grease such as oil separation, friction properties, and low temperature properties are equal to or higher than those of conventional heat-resistant grease, and the heat resistance in an operating environment of 130°C or higher is achieved. It is possible to provide a heat-resistant grease that has properties superior to conventional heat-resistant greases.
前述のように本発明に係る耐熱グリースは、平均粒子径が２μｍ以下であるメラミンシアヌレートを増ちょう剤として含むことで１３０℃以上の使用環境下における耐熱性について、従来の耐熱グリース以上の特性を有する。 As mentioned above, the heat-resistant grease according to the present invention contains melamine cyanurate with an average particle size of 2 μm or less as a thickener, so that it has better heat resistance than conventional heat-resistant greases in an environment of use of 130°C or higher. has.
このため、耐熱性向上のためにフッ素化合物等のハロゲン化合物を含む基油を使用する必要はない。フッ素化合物等のハロゲン化合物を含む基油は、近年環境問題が取りざたされていることから、本発明の耐熱グリースは環境にやさしいとの効果も有する。さらに、フッ素化合物等のハロゲン化合物を含む基油は非常に高価であるため、本発明の耐熱グリースは低コストに寄与し得るとの効果も有する。 Therefore, it is not necessary to use a base oil containing a halogen compound such as a fluorine compound to improve heat resistance. Since base oils containing halogen compounds such as fluorine compounds have become an environmental issue in recent years, the heat-resistant grease of the present invention also has the effect of being environmentally friendly. Furthermore, since base oils containing halogen compounds such as fluorine compounds are very expensive, the heat-resistant grease of the present invention also has the effect of contributing to lower costs.
これらの効果、特性を有する本発明は、小型化が進み耐熱耐久性が求められる電気電子分野や車載分野等での使用に適している。 The present invention having these effects and characteristics is suitable for use in electrical and electronic fields, automotive fields, etc. where miniaturization is progressing and heat resistance and durability are required.
以下、本発明の各構成成分について、詳しく説明する。 Each component of the present invention will be explained in detail below.
［増ちょう剤］
前述のように本発明に係る耐熱グリースは、平均粒子径が２μｍ以下であるメラミンシアヌレートを増ちょう剤として含む。メラミンシアヌレートは、グラファイト構造を持つため、これを増ちょう剤として使用することで従来の耐熱グリースと同等以上の優れた摩擦特性の機能付与が可能になる。また、メラミンシアヌレートは、熱分解温度が２５０℃以上であるため、これを増ちょう剤として使用することで１３０℃以上の使用環境下における耐熱性について、従来の耐熱グリース以上の特性付与が可能になる。
[Thickener]
As described above, the heat-resistant grease according to the present invention contains melamine cyanurate having an average particle size of 2 μm or less as a thickener. Melamine cyanurate has a graphite structure, so by using it as a thickener, it is possible to provide friction properties that are equal to or better than those of conventional heat-resistant greases. In addition, melamine cyanurate has a thermal decomposition temperature of 250°C or higher, so by using it as a thickener, it is possible to provide better heat resistance than conventional heat-resistant greases in use environments of 130°C or higher. become.
本発明のメラミンシアヌレートの平均粒子径は、２μｍ以下であれば本発明の効果を得ることができるが、１μｍ以下がより好ましい。 The effects of the present invention can be obtained if the average particle diameter of the melamine cyanurate of the present invention is 2 μm or less, but it is more preferably 1 μm or less.
メラミンシアヌレートは、従来からグリースの極圧特性や摩耗特性を向上させるために各種グリースに個体添加剤として使用されることがあったものの、グリースの増ちょう効果が乏しいため増ちょう剤として使用することは難しいとされてきた。しかしながら、本発明で使用する平均粒子径が２μｍ以下のメラミンシアヌレートは高いグリースの増ちょう効果を有し、増ちょう剤として使用することができる。平均粒子径が２μｍ以下であるメラミンシアヌレートを増ちょう剤として使用することにより、ＮＬＧＩグレードでのちょう度規格１号から３号に調整することができる。 Melamine cyanurate has traditionally been used as a solid additive in various greases to improve the extreme pressure characteristics and wear characteristics of greases, but it is used as a thickener because it has a poor thickening effect on greases. This has been considered difficult. However, the melamine cyanurate used in the present invention having an average particle diameter of 2 μm or less has a high grease thickening effect and can be used as a thickener. By using melamine cyanurate having an average particle diameter of 2 μm or less as a thickener, it is possible to adjust the consistency from No. 1 to No. 3 according to the NLGI grade.
本発明に使用できるメラミンシアヌレートの具体例として、ＭＣ－６０００（日産化学（株）製）やＭｅｌａｍｉｎｅ Ｃｙａｎｕｒａｔｅ ＨＭ０１（Ｌｉａｎｙｕｎｇａｎｇ Ｈａｎｍｉｎｇ Ｎｅｗ Ｍａｔｅｒｉａｌｓ社製）などが挙げられる。 Specific examples of melamine cyanurate that can be used in the present invention include MC-6000 (manufactured by Nissan Chemical Co., Ltd.) and Melamine Cyanurate HM01 (manufactured by Lianyungang Hanming New Materials).
［基油］
前述のように、本発明に係る耐熱グリースは、耐熱性向上のためにフッ素化合物等のハロゲン化合物を含む基油を使用する必要はなく、基油としては、公知のものが使用できる。例えば鉱油、ポリアルファオレフィン油、エステル油、フェニルエーテル油、シリコーン油もしくはパーフルオロポリエーテル油などが使用される。基油の粘度が低いほど油分離が起こりやすいため、拡散防止剤が塗布面に配向されるよりも先に油の拡散が起こるが、４０℃における基油の粘度が１６ｍｍ２／ｓ以上であれば本願発明に使用することができる。
[Base oil]
As mentioned above, the heat-resistant grease according to the present invention does not need to use a base oil containing a halogen compound such as a fluorine compound to improve heat resistance, and any known base oil can be used as the base oil. For example, mineral oil, polyalphaolefin oil, ester oil, phenyl ether oil, silicone oil or perfluoropolyether oil are used. The lower the viscosity of the base oil, the more likely it is that oil separation will occur , so oil diffusion will occur before the diffusion inhibitor is oriented on the coating surface. If so, it can be used in the present invention.
特にその中で、非ハロゲン系であり耐熱性に優れるポリオールエステル油もしくはフェニルエーテル油が望ましく、さらに、耐熱グリースの耐熱性をより高めるとの観点から、４０℃における基油の粘度は５０ｍｍ２／ｓ以上が好ましく、８０ｍｍ２／ｓ以上がより好ましい。また、トルクを低くすることができるとの観点から、４０℃における基油の粘度は４００ｍｍ２／ｓ以下が好ましく、３００ｍｍ２／ｓ以下がより好ましい。
ポリオールエステル油としては、３エステル基以上で構成される例えばトリメチロールプロパン系やペンタエリスリトール系由来のもの、具体例として、Ｓｙｎａｔｉｖｅ ＥＳ ＴＭＰ（ＢＡＳＦ社製）やＳｙｎａｔｉｖｅ ＥＳ（ＢＡＳＦ社製）などが挙げられる。
一方、フェニルエーテル油としては、モレスコハイルーブＬＢ－１５、ＬＢ－６８Ｄ、ＬＢ－１００（（株）ＭＯＲＥＳＣＯ製）などが挙げられる。
Among them, polyol ester oil or phenyl ether oil, which is non-halogenated and has excellent heat resistance, is particularly desirable.Furthermore, from the viewpoint of further increasing the heat resistance of heat-resistant grease, the viscosity of the base oil at 40°C is 50 mm 2 / s or more is preferable, and 80 mm 2 /s or more is more preferable. Further, from the viewpoint of being able to lower the torque, the viscosity of the base oil at 40° C. is preferably 400 mm 2 /s or less, more preferably 300 mm 2 /s or less.
Examples of polyol ester oils include those composed of three or more ester groups, such as those derived from trimethylolpropane and pentaerythritol, and specific examples include Synative ES TMP (manufactured by BASF) and Synative ES (manufactured by BASF). It will be done.
On the other hand, examples of the phenyl ether oil include Moresco High Lube LB-15, LB-68D, and LB-100 (manufactured by MORESCO Co., Ltd.).
［その他の成分］
本発明に係る耐熱グリースは、例えば、酸化防止剤、極圧剤、摩耗防止剤、防錆剤、金属不活性剤など各種添加剤を必要に応じて配合することができる。
[Other ingredients]
The heat-resistant grease according to the present invention may contain various additives, such as an antioxidant, an extreme pressure agent, an anti-wear agent, a rust preventive, and a metal deactivator, as necessary.
［配合量］
本発明に係る耐熱グリース中のメラミンイソシアネートの配合量としては２０～５０質量％が好ましい。耐熱グリース中の増ちょう剤の配合量が２０質量％以上であれば、本願発明の効果が得られるうえ、基油との接触面積が十分となり、油分離を十分防止することができる。また、耐熱グリース中の増ちょう剤の配合量が５０質量％以下であれば、油分離を低くし、グリース化することができる。増ちょう剤の配合量は２５質量％以上がより好ましく、３０質量％以上が最も好ましい。また、４０質量％以下がより好ましい。
[Amount]
The amount of melamine isocyanate contained in the heat-resistant grease according to the present invention is preferably 20 to 50% by mass. When the content of the thickener in the heat-resistant grease is 20% by mass or more, not only the effects of the present invention can be obtained, but also the contact area with the base oil is sufficient, and oil separation can be sufficiently prevented. Furthermore, if the amount of thickener added in the heat-resistant grease is 50% by mass or less, oil separation can be reduced and the grease can be made into a grease. The content of the thickener is more preferably 25% by mass or more, most preferably 30% by mass or more. Moreover, 40 mass % or less is more preferable.
本発明に係る耐熱グリース中の基油の配合量としては５０～８０質量％が好ましく、基油の配合量が多いほど拡散防止剤の量を多く添加することが好ましい。また、前述の通り基油の粘度が低いほど油分離が起こりやすいため、拡散防止剤が塗布面に配向されるよりも先に油の拡散が起こる。そのため、基油の粘度が低いほど拡散防止剤の添加量を増やすことが望ましい。 The amount of base oil blended in the heat-resistant grease according to the present invention is preferably 50 to 80% by mass, and the larger the amount of base oil blended, the more preferably the amount of diffusion inhibitor is added. Furthermore, as described above, the lower the viscosity of the base oil, the more likely oil separation will occur, so oil diffusion occurs before the diffusion inhibitor is oriented on the coating surface. Therefore, it is desirable to increase the amount of the diffusion inhibitor added as the viscosity of the base oil decreases.
［耐熱グリースの製造方法について］
本発明の耐熱グリースは周知の一般的な方法により製造が可能である。例えば、基油と増ちょう剤を万能混錬機によって混錬しグリース基材を得、得られたグリース基材に対して必要に応じ各種添加剤を添加した後、３本ロールなどを用いて混錬を行うことで得ることができる。
[About the manufacturing method of heat-resistant grease]
The heat-resistant grease of the present invention can be manufactured by a well-known general method. For example, a base oil and a thickener are kneaded using a universal kneader to obtain a grease base material, various additives are added as needed to the resulting grease base material, and then the mixture is mixed using a three-roll machine or the like. It can be obtained by kneading.
（耐熱グリースの製造）
表１中に示す材料を用い、実施例１～３、比較例１のグリースを製造した。増ちょう剤としてのメラミンシアヌレートと各種グリース基油を表１中に示す秤量し、これらを容器に入れてヘラで十分攪拌混合させた後、３本ロールミルにて加圧分散処理を行い、ＮＬＧＩちょう度規格２号のグリースを作成した。なお、表１中、配合量は「質量部」で表される。また、比較例２については、市販グリースを使用した。
(Manufacture of heat-resistant grease)
Greases of Examples 1 to 3 and Comparative Example 1 were manufactured using the materials shown in Table 1. Melamine cyanurate as a thickener and various grease base oils as shown in Table 1 were weighed, put into a container, stirred and mixed thoroughly with a spatula, and then subjected to pressure dispersion treatment in a three-roll mill to obtain NLGI. Grease with consistency standard No. 2 was created. In Table 1, the blending amount is expressed in "parts by mass". Furthermore, for Comparative Example 2, a commercially available grease was used.
実施例１～３、比較例１、２の各グリースに対して、離油特性、摩擦特性、低温性の潤滑グリースに必要な特性と、耐熱性を各々測定した。結果を表１中に併せて記載する。 For each of the greases of Examples 1 to 3 and Comparative Examples 1 and 2, oil separation properties, friction properties, properties necessary for low-temperature lubricating greases, and heat resistance were measured. The results are also listed in Table 1.
（離油度の評価）
ＪＩＳ Ｋ２２２０．１１に準拠し測定した。離油度の評価基準は以下の通りとした。
◎：離油度が０．５質量％未満であった。
〇：離油度が０．５質量％以上１．０質量％未満であった。
×：離油度が１．０質量％以上であった。
(Evaluation of oil separation degree)
Measured in accordance with JIS K2220.11. The evaluation criteria for oil separation degree were as follows.
◎: Oil separation degree was less than 0.5% by mass.
O: Oil separation degree was 0.5% by mass or more and less than 1.0% by mass.
×: Oil separation degree was 1.0% by mass or more.
（摩擦特性の評価）
往復動試験機（装置名：ＨＥＩＤＯＮ １４ＤＲ、新東科学（株）製）を用い、振幅１０ｍｍ、荷重２００ｇの条件にてのＳＵＳ製ボールとＳＵＳ製板の摺動の動摩擦係数を測定した。摩擦特性の評価基準は以下の通りとした。
◎：動摩擦係数が０．３未満であった。
〇：動摩擦係数が０．３以上０．４未満であった。
×：動摩擦係数が０．４以上であった。
(Evaluation of friction characteristics)
Using a reciprocating motion tester (equipment name: HEIDON 14DR, manufactured by Shinto Kagaku Co., Ltd.), the coefficient of dynamic friction of sliding between an SUS ball and an SUS plate was measured under conditions of an amplitude of 10 mm and a load of 200 g. The evaluation criteria for friction characteristics were as follows.
◎: Dynamic friction coefficient was less than 0.3.
Good: Dynamic friction coefficient was 0.3 or more and less than 0.4.
×: Dynamic friction coefficient was 0.4 or more.
（耐熱性の評価）
恒温槽（装置名：ＴＨＲ０５０ＦＡ、（株）アドバンテック製）を用い、２００℃、５時間の条件にて蒸発損失を測定した。耐熱性の評価基準は以下の通りとした。
◎：蒸発損失が３質量％未満であった。
〇：蒸発損失が３質量％以上７質量％未満であった。
×：蒸発損失が７質量％以上であった。
(Evaluation of heat resistance)
Evaporation loss was measured using a constant temperature bath (equipment name: THR050FA, manufactured by Advantech Co., Ltd.) at 200° C. for 5 hours. The evaluation criteria for heat resistance were as follows.
◎: Evaporation loss was less than 3% by mass.
Good: Evaporation loss was 3% by mass or more and less than 7% by mass.
×: Evaporation loss was 7% by mass or more.
（低温性の評価）
見掛粘度試験機（装置名：ＨＡＡＫＥ、サーモフィッシャーサイエンティフィック（株）製）を用い、－２０℃、２５ｓ－１の条件にて見掛粘度を測定した。低温性の評価基準は以下の通りとした。
◎：見掛粘度が２０Ｐａ・ｓ未満であった。
〇：見掛粘度が２０Ｐａ・ｓ以上４０Ｐａ・ｓ未満であった。
×：見掛粘度が４０Ｐａ・ｓ以上であった。
(Low temperature evaluation)
The apparent viscosity was measured using an apparent viscosity tester (equipment name: HAAKE, manufactured by Thermo Fisher Scientific Co., Ltd.) under the conditions of -20°C and 25 s -1 . The evaluation criteria for low temperature properties were as follows.
◎: Apparent viscosity was less than 20 Pa·s.
Good: Apparent viscosity was 20 Pa·s or more and less than 40 Pa·s.
×: Apparent viscosity was 40 Pa·s or more.
（＊１）Ｌｉａｎｙｕｎｇａｎｇ Ｈａｎｍｉｎｇ Ｎｅｗ Ｍａｔｅｒｉａｌｓ社製メラミンシアヌレート 商品名：Ｍｅｌａｍｉｎｅ Ｃｙａｎｕｒａｔｅ ＨＭ０１、平均粒子径：０．９μｍ
（＊２）日産化学（株）製メラミンシアヌレート 商品名：ＭＣ－４５００、平均粒子径：４μｍ
（＊３）（株）ＭＯＲＥＳＣＯ製フェニルエーテル 商品名：ＭＯＲＥＳＣＯハイルーブＬＢ－６８Ｄ、４０℃粘度：６８ｍｍ２／ｓ
（＊４）（株）ＭＯＲＥＳＣＯ製フェニルエーテル 商品名：ＭＯＲＥＳＣＯハイルーブＬＢ－１００、４０℃粘度：１０２ｍｍ２／ｓ
（＊５）ＢＡＳＦ社製ポリオールエステル 商品名：Ｓｙｎａｔｉｖｅ ＥＳ―２８１１、４０℃粘度：２００ｍｍ２／ｓ
（＊６）カントーカセイ（株）製グリース 商品名：ＦＬＯＩＬグリース、増ちょう剤：ウレア（１０質量％配合）、基油：ＰＡＯ（９０質量％配合）
(*1) Melamine cyanurate manufactured by Lianyungang Hanming New Materials Product name: Melamine Cyanurate HM01, average particle size: 0.9 μm
(*2) Melamine cyanurate manufactured by Nissan Chemical Co., Ltd. Product name: MC-4500, average particle size: 4 μm
(*3) Phenyl ether manufactured by MORESCO Co., Ltd. Product name: MORESCO High Lube LB-68D, 40°C viscosity: 68 mm 2 /s
(*4) Phenyl ether manufactured by MORESCO Co., Ltd. Product name: MORESCO Hi-Lube LB-100, 40°C viscosity: 102 mm 2 /s
(*5) BASF polyol ester Product name: Synative ES-2811, 40°C viscosity: 200mm 2 /s
(*6) Grease manufactured by Kanto Kasei Co., Ltd. Product name: FLOIL Grease, Thickener: Urea (10% by mass blend), Base oil: PAO (90% by mass blend)
表１に示すように、グリースの離油特性に関して、平均粒子径が小さいメラミンシアヌレートを増ちょう剤として使用したグリースは離油が少ないことが確認できた。これは、メラミンシアヌレートの平均粒子径が小さいほど、基油に対して保持性が優れているためと考えられる。
増ちょう剤にメラミンシアヌレート（ナノ）もしくはメラミンシアヌレートを用いた場合、耐熱性が優れている結果となり、メラミンシアヌレート（ナノ）と高粘度のフェニルエーテルもしくはポリオールエステルのグリースの耐熱性が特に優れていた。
増ちょう剤にメラミンシアヌレート（ナノ）を用いた場合、摩擦特性に関しても優れた結果を示しており、低温性に関しても維持していることが確認できた。
As shown in Table 1, regarding the oil separation properties of the grease, it was confirmed that the grease using melamine cyanurate, which has a small average particle size, as a thickener had less oil separation. This is thought to be because the smaller the average particle diameter of melamine cyanurate, the better the retention of the base oil.
When melamine cyanurate (nano) or melamine cyanurate is used as a thickener, the heat resistance is excellent, and the heat resistance of greases made of melamine cyanurate (nano) and high viscosity phenyl ether or polyol ester is particularly high. It was excellent.
When melamine cyanurate (nano) was used as the thickener, it was confirmed that excellent results were shown in terms of frictional properties and that low-temperature properties were also maintained.
以上のように、本発明によれば、離油度、摩擦特性、低温性といった潤滑グリースに必要な特性について、従来の耐熱グリースと同等以上の特性を有しつつ、１３０℃以上の使用環境下における耐熱性について、従来の耐熱グリース以上の特性を有する耐熱グリースを提供することができる。
As described above, according to the present invention, the lubricating grease has properties required for a lubricating grease such as oil separation, frictional properties, and low-temperature properties that are equivalent to or higher than conventional heat-resistant grease, and can be used in environments of 130°C or higher. With regard to heat resistance, it is possible to provide a heat-resistant grease that has better properties than conventional heat-resistant greases.
Claims (5)
The heat-resistant grease according to claim 4, wherein the base oil has a viscosity of 80 mm 2 /s or more at 40°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022139150A JP2024034708A (en) | 2022-09-01 | 2022-09-01 | Heat-resistance grease |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022139150A JP2024034708A (en) | 2022-09-01 | 2022-09-01 | Heat-resistance grease |
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| JP2024034708A true JP2024034708A (en) | 2024-03-13 |
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| JP2022139150A Pending JP2024034708A (en) | 2022-09-01 | 2022-09-01 | Heat-resistance grease |
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