JP5663468B2 - グリース組成物における高粘度指数paoとポリ尿素増稠剤 - Google Patents
グリース組成物における高粘度指数paoとポリ尿素増稠剤 Download PDFInfo
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Description
処方は、高粘度合成グループIVのPAOの二峰性ブレンドに基づく。好ましい実施形態においては、100cStKV100℃超の高粘度指数接触PAOが、グループII、グループIII、PAO、およびGTLからなる群から選択されるより低粘度の基材と、ポリ尿素増稠剤と共にブレンドされる。
グループI、II、III、IV、およびVは、潤滑油基油の指針を作成するのに米国石油協会によって開発および定義された基油材の広い分類(非特許文献4)である。グループI基材は、一般に、粘度指数約80〜120を有し、硫黄約0.03%超および/または飽和分約90%未満を含む。グループII基材は、一般に、粘度指数約80〜120を有し、硫黄約0.03%以下および飽和分約90%以上を含む。グループIII材は、一般に、粘度指数約120超を有し、硫黄約0.03%以下および飽和分約90%超を含む。グループIVには、ポリアルファオレフィン(PAO)が含まれる。グループV基材には、グループI〜IVに含まれない基材が含まれる。表3は、これらの5グループそれぞれの特性を要約する。グループI〜V基材について、全ての議論は、非特許文献5に見出すことができる。
最終生成物の粘度グレードは、異なる粘度の基材成分を適切にブレンドすることによって調節される。多くの従来の工業潤滑油処方においては、増稠剤が、粘度を増大するのに用いられる。異なる粘度グレードのHVI−PAO流体は、実質的な性能の利点を有する広い仕上げ粘度グレードを達成するのに、最も適切に用いられる。通常、異なる粘度の種々の基材成分(主要な炭化水素基材、第二の基材、および任意の更なる基材成分も)の異なる量が、適切にブレンドされて、仕上げ潤滑油の他の成分(次に記載されるものなど)とブレンドするのに適切な粘度の基材ブレンドが得られる。これは、過度の実験なしに、本開示を専有する当業者によって決定されてもよい。最終生成物の粘度グレードは、好ましくはISO 2〜ISO 1000であるか、または工業潤滑油の用途に対しては更により高い。例えば約ISO 46,000以下である。より低い粘度グレード(典型的にはISO 2〜ISO 100)については、組み合わせ基材の粘度は、最終生成物のそれより僅かに高いであろう。典型的にはISO 2〜約ISO 220である。しかし、ISO46,000以下のより粘稠なグレードにおいては、添加剤は、しばしば、基材ブレンドの粘度を、僅かにより低い値へ低減するであろう。ISO 680グレードの潤滑油については、例えば、基材ブレンドは、添加剤の性質および量によって、約780〜800cSt(40℃)であってもよい。
出願人は、この独特な基材組み合わせが、特定の添加剤系と組合された場合に、更に好適な特性を付与することができることを発見した。添加剤には、種々の商業的に入手可能なグリース添加剤が含まれる。
Claims (18)
- 好適な摩擦特性を有するグリースであって、
a)粘度100cStKV100℃超および粘度指数100超を有するPAOを含む第一の基材、
b)前記第一の基材の粘度より少なくとも25cStKV100℃低い粘度を有し、PAOである第二の基材、および
c)ポリ尿素増稠剤
を含み、
前記第一の基材が基材全体の82〜85重量%を構成し、前記第二の基材が基材全体の15〜18重量%を構成し、基材全体が前記グリースの72〜75重量%を構成し、前記ポリ尿素増稠剤が前記グレースの18〜22重量%構成し、
オプチモールSRV試験により測定される前記グリースの摩擦係数が、50〜600ニュートンの負荷範囲において、0.067以下である、
ことを特徴とするグリース。 - 等速継ぎ手グリースとして用いられることを特徴とする請求項1に記載のグリース。
- 耐磨耗剤、防錆剤、摩擦低減剤、低温特性添加剤、極圧剤およびそれらの任意の組み合わせからなる群から選択される少なくとも一種の添加剤を更に含むことを特徴とする請求項1に記載のグリース。
- 前記ポリ尿素は、イソシアネートとアミンの反応物であることを特徴とする請求項1に記載のグリース。
- 前記ポリ尿素増稠剤は、少なくとも、10ミクロン〜700ミクロン未満、密度7.16ポンド/ガロン(0.858g/cm3)未満および比表面積20m2/g超であるポリ尿素粒子を含むことを特徴とする請求項1に記載のグリース。
- 粘度100cStKV100℃超および粘度指数100超を有することを特徴とする請求項1に記載のグリース。
- 摩擦特性を向上する方法であって、
a)好適な摩擦特性を有するグリースを得る工程であって、前記グリースは、
粘度100cStKV100℃超および粘度指数100超を有するPAOを含む第一の基材、
前記第一の基材の粘度より少なくとも25cStKV100℃低い粘度を有し、PAOである第二の基材、および
ポリ尿素増稠剤
を含む工程、および
b)前記グリースで潤滑する工程を含み、
前記第一の基材が、基材全体の82〜85重量%を構成し、前記第二の基材が、基材全体の15〜18重量%を構成し、基材全体が、グリースの72〜75重量%を構成し、前記ポリ尿素増稠剤が、グリースの18〜22重量%を構成し、
オプチモールSRV試験により測定された前記グリースの摩擦係数が、50〜600ニュートンの負荷範囲において、0.067以下である、
ことを特徴とする方法。 - 前記グリースは、等速継ぎ手グリースとして用いられることを特徴とする請求項7に記載の方法。
- 前記グリースは、耐磨耗剤、防錆剤、摩擦低減剤、低温特性添加剤、極圧剤およびそれらの任意の組み合わせからなる群から選択される少なくとも一種の添加剤を更に含むことを特徴とする請求項7に記載の方法。
- 前記ポリ尿素増稠剤は、イソシアネートとアミンの反応物であることを特徴とする請求項7に記載の方法。
- 前記ポリ尿素増稠剤は、少なくとも、10ミクロン〜700ミクロン未満、密度7.16ポンド/ガロン(0.858g/cm3)未満および比表面積20m2/g超であるポリ尿素粒子を含むことを特徴とする請求項7に記載の方法。
- 前記グリースは、粘度100cStKV100℃超および粘度指数100超を有することを特徴とする請求項7に記載の方法。
- 好適な摩擦特性を有するグリースを配合する方法であって、
a)粘度100cStKV100℃超および粘度指数100超を有するPAOを含む第一の基材、前記第一の基材の粘度より少なくとも25cStKV100℃低い粘度を有し、PAOである第二の基材、およびポリ尿素増稠剤を得る工程、および
b)前記第一の基材、前記第二の基材および前記増稠剤を配合して、好適な摩擦特性を有するグリースを形成する工程
を含み、
前記第一の基材が、基材全体の82〜85重量%を構成し、前記第二の基材が、基材全体の15〜18重量%を構成し、基材全体が、グリースの72〜75重量%を構成し、前記ポリ尿素増稠剤が、グリースの18〜22重量%を構成し、
オプチモールSRV試験により測定された前記グリースの摩擦係数が、50〜600ニュートンの負荷範囲において、0.067以下である、
ことを特徴とする方法。 - 前記グリースは、等速継ぎ手グリースとして用いられることを特徴とする請求項13に記載の方法。
- 前記グリースは、耐磨耗剤、防錆剤、摩擦低減剤、低温特性添加剤、極圧剤およびそれらの任意の組み合わせからなる群から選択される少なくとも一種の添加剤を更に含むことを特徴とする請求項13に記載の方法。
- 前記ポリ尿素増稠剤は、イソシアネートとアミンの反応物であることを特徴とする請求項13に記載の方法。
- 前記ポリ尿素増稠剤は、少なくとも、10ミクロン〜700ミクロン未満、密度7.16ポンド/ガロン(0.858g/cm3)未満および比表面積20m2/g超であるポリ尿素粒子を含むことを特徴とする請求項13に記載の方法。
- 前記グリースは、粘度100cStKV100℃超および粘度指数100超を有することを特徴とする請求項13に記載の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7243308P | 2008-03-31 | 2008-03-31 | |
US61/072,433 | 2008-03-31 | ||
US12/378,466 US8772210B2 (en) | 2008-03-31 | 2009-02-13 | High viscosity index PAO with polyurea thickeners in grease compositions |
US12/378,466 | 2009-02-13 | ||
PCT/US2009/001984 WO2009145825A2 (en) | 2008-03-31 | 2009-03-31 | High viscosity index pao with polyurea thickeners in grease compositions |
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US8772210B2 (en) | 2014-07-08 |
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WO2009145825A2 (en) | 2009-12-03 |
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