CN107922868A - 润滑脂组合物及封入润滑脂滚动轴承 - Google Patents
润滑脂组合物及封入润滑脂滚动轴承 Download PDFInfo
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Abstract
本发明提供能够作为滚动轴承的润滑剂来使用、高温耐久性及防锈性优异、并且能够防止氢致脆性所导致的滚行面处的早期剥离的润滑脂组合物等。就滚动轴承(1)而言,通过将润滑脂组合物(7)封入滚动体(4)的周围而成,该润滑脂组合物(7)包含基油、增稠剂和添加剂,所述基油不包括酯系合成油,该添加剂包含(a)链烷醇胺和(b)2,2,4‑三甲基‑1,2‑二氢喹啉或其聚合物、并且不含有机磺酸盐,就(a)和(b)而言,相对于基油和增稠剂的合计量100重量份,各自含有0.1~10重量份。
Description
技术领域
本发明涉及润滑脂组合物及封入了该润滑脂组合物的滚动轴承。
背景技术
目前为止,在产业界中,为了实现在滚动轴承等的滚动部件中使用的润滑剂(润滑脂组合物等)的高性能化,尝试了在润滑剂中配合各种添加剂。在高温条件下使用滚动轴承等的情况下,封入的润滑脂组合物氧化劣化,润滑膜变得容易断裂等,有可能润滑寿命变短。特别是在高温且高速条件下,变得容易发生润滑膜的断裂,如果断裂,则发生滚动部件间的金属接触,产生发热、摩擦磨损增大的不利情形。因此,在滚动轴承等中使用的润滑脂组合物中,为了提高高温耐久性,作为抗氧化剂,将胺系抗氧化剂、酚系抗氧化剂等单独使用或者将多种组合使用。另外,为了同时防止滚动部件中的生锈,在润滑脂组合物中使用了有机磺酸盐、山梨糖醇酐脂肪酸酯作为防锈剂。
例如,在轴承用润滑剂中,作为抗氧化剂,提出了使用2,2′-亚甲基双(6-叔-丁基-4-甲基苯酚)等的酚系抗氧化剂、辛基化二苯胺等的胺系抗氧化剂、吩噻嗪等的硫系抗氧化剂、二硫代磷酸锌等的磷系抗氧化剂(参照专利文献1)。在专利文献1中,进一步记载了能够将作为其他添加剂的石油磺酸酯、二壬基萘磺酸酯、山梨糖醇酐酯等防锈剂并用。
另外,在滚动轴承中,由于在上述的高温且高速条件上加上急加减速等,使用条件变得严酷,因此有可能在早期在滚行面发生伴有白色组织变化的特异的剥离。该特异的剥离与通常的由于金属疲劳而产生的从滚行面内部的剥离不同,是从滚行面表面的比较浅的部位发生的破坏现象,认为是氢为原因的氢致脆性。认为例如润滑脂分解而产生氢,其侵入滚动轴承的钢中,从而发生以氢致脆性为起因的早期剥离。由于氢使钢的疲劳强度显著地降低,因此即使在认为是接触要素间被油膜隔断的弹性流体润滑的条件下,也在交替剪切应力成为最大的滚动表层内部附近产生龟裂、传播以致早期剥离。
作为抑制这样的早期发生的伴有白色组织变化的特异的剥离现象的方法,例如提案有添加二硫代氨基甲酸铋的方法(参照专利文献2)、添加钼酸盐和有机酸盐的方法(参照专利文献3)。
此外,作为耐热性、机械稳定性、耐水性、防锈性、耐负荷性、阻燃性等优异的润滑脂组合物,提案有在由矿物油、合成油构成的基油中配合了磷酸三钙和二乙醇胺类等的润滑脂结构稳定化剂的润滑脂组合物(参照专利文献4)。
现有技术文献
专利文献
专利文献1:日本特开2005-188557号公报
专利文献2:日本特开2005-42102号公报
专利文献3:日本特开2005-112902号公报
专利文献4:日本特开2008-156624号公报
发明内容
发明要解决的课题
即使在使用专利文献1那样的抗氧化剂的情况下,因组合的其他添加剂的种类、润滑时的温度条件(例如,180℃以上)等,有时对于高温耐久性得不到充分的性能。另外,近年来,滚动轴承的使用条件变得严酷,滚动体与轨道轮之间的面压上升、急加减速所引起的滑动增大,变得容易引起该部分处的油膜断开(润滑不良)。在这样的严酷化的环境下,如果是采用以往的添加剂的方法,作为防止上述剥离现象的对策已变得不充分。
另外,对于高温耐久性的提高、防锈性的提高、氢致脆性所导致的滚行面处的早期剥离的防止这样的特性的各个单独的特性,即使将添加剂的组合最优化而得以应对,但同时满足这些特性的全部并不容易。这是因为,通过必要成分的具体的组合,有时反而给予不良影响,只凭借单纯地将适于各个要求特性的公知的添加剂等并用,不能发挥所期望的效果。
本发明为了应对这样的问题而完成,目的在于提供能够作为滚动轴承的润滑剂使用、高温耐久性和防锈性优异、并且能够防止氢致脆性所导致的滚行面处的早期剥离的润滑脂组合物和封入了该润滑脂组合物的封入润滑脂滚动轴承。
用于解决课题的手段
就本发明的润滑脂组合物而言,其特征在于,其为包含基油、增稠剂和添加剂的润滑脂组合物,所述基油不包括酯系合成油,上述添加剂包含(a)链烷醇胺、(b)由下述式(1)表示的化合物或其聚合物,并且不含有机磺酸盐,就上述(a)及(b)而言,相对于上述基油和上述增稠剂的合计量100重量份,各自含有0.1~10重量份。
[化1]
其特征在于,上述链烷醇胺为二乙醇胺。
其特征在于,上述添加剂包含(c)二硫代磷酸锌、(d)有机酸的金属盐和(e)胺系抗氧化剂,就上述(c)~(e)而言,相对于上述基油和上述增稠剂的合计量100重量份,各自含有0.1~10重量份。另外,其特征在于,上述有机酸的金属盐为癸二酸二钠,上述胺系抗氧化剂为辛基化二苯胺。
其特征在于,上述基油为选自烷基二苯醚油和聚-α-烯烃(以下也称为“PAO”)油中的至少1种油。另外,其特征在于,上述增稠剂为脂环族二脲化合物。
本发明的封入润滑脂轴承,其特征在于,封入有本发明的润滑脂组合物。
发明的效果
本发明的润滑脂组合物在由不包括酯系合成油的基油和增稠剂构成的基础润滑脂中含有规定量的(a)链烷醇胺和(b)规定的喹啉系抗氧化剂作为添加剂,并且不含有机磺酸盐,因此通过封入到滚动轴承等中,高温耐久性及防锈性优异,并且能够防止氢致脆性所导致的滚行面等处的早期剥离。
另外,作为添加剂,含有规定量的(c)二硫代磷酸锌、(d)癸二酸二钠等的有机酸金属盐和(e)辛基化二苯胺等的胺系抗氧化剂,因此能够进一步发挥上述效果。
就本发明的封入润滑脂滚动轴承而言,由于封入有本发明的润滑脂组合物,因此高温耐久性和防锈性优异,并且能够防止氢致脆性所导致的滚行面处的早期剥离,成为长寿命。
附图说明
图1为本发明的封入润滑脂滚动轴承的一例的截面图。
具体实施方式
本发明的润滑脂组合物,其特征在于,包含不包括酯系合成油的基油和增稠剂和添加剂,该添加剂包含(a)链烷醇胺和(b)规定的喹啉系抗氧化剂,而且不含有机磺酸盐。另外,根据需要,在添加剂中含有(c)二硫代磷酸锌、(d)有机酸的金属盐和(e)胺系抗氧化剂。
通过配合(a)链烷醇胺(螯合剂),即使在滚行面处的严酷条件(边界润滑条件)下油膜变薄的情况下,在摩擦磨损面或由于磨损而露出的铁系金属新生面处,通过链烷醇胺进行吸附(螯合作用)等,也能够防止铁系金属新生面与润滑脂的直接接触。由此抑制润滑脂的分解引起的氢的产生,能够防止氢致脆性引起的滚行面处的早期剥离。另外,在使用这样的链烷醇胺作为添加剂的情况下,如果将作为已有的防锈剂的磺酸锌、磺酸钙等的有机磺酸盐并用,则阻碍其效果,因此将其排除。进而,通过采用(b)规定的喹啉系抗氧化剂作为抗氧化剂,保持链烷醇胺产生的早期剥离防止效果、同时使高温耐久性提高。
(a)链烷醇胺
作为本发明中使用的链烷醇胺,可列举出一异丙醇胺、一乙醇胺和一正丙醇胺等的伯链烷醇胺、N-烷基一乙醇胺和N-烷基一丙醇胺等的仲链烷醇胺、三乙醇胺、环己基二乙醇胺、三(正丙醇)胺、三异丙醇胺、N,N-二烷基乙醇胺和N-烷基(或烯基)二乙醇胺等的叔链烷醇胺。另外,根据链烷醇基的数,分类为一链烷醇胺、二链烷醇胺、三链烷醇胺,在本发明中从通过多个羟基(链烷醇基)与氨基的螯合作用来将铁离子夹持、容易防止铁系金属新生面的露出出发,优选使用二链烷醇胺或三链烷醇胺。
上述中,从与基油的相容性和防剥离能力优异、得到性也优异出发,优选使用下述式(2)的N-烷基(或烯基)二乙醇胺。
[化2]
式中的R1表示碳原子数1~20的直链或分支状的烷基或烯基。另外,碳原子数优选1~12,更优选1~8。作为具体的化合物,例如可列举出N-甲基二乙醇胺、N-乙基二乙醇胺、N-丙基二乙醇胺、N-丁基二乙醇胺、N-戊基二乙醇胺、N-己基二乙醇胺、N-庚基二乙醇胺、N-辛基二乙醇胺、N-壬基二乙醇胺、N-癸基二乙醇胺、N-十一烷基二乙醇胺、N-十二烷基二乙醇胺、N-十三烷基二乙醇胺、N-十四烷基二乙醇胺、N-十五烷基二乙醇胺、N-十六烷基二乙醇胺、N-十七烷基二乙醇胺、N-油烯基二乙醇胺、N-十八烷基二乙醇胺、N-异硬脂基二乙醇胺、N-十九烷基二乙醇胺、N-二十烷基二乙醇胺等。
链烷醇胺可单独地使用1种,也可将2种以上组合使用。另外,链烷醇胺优选在室温及使用温度下为液体或糊状的物质。另外,可以是在溶剂等中被分散的状态。通过使用这样的链烷醇胺,即使在严酷条件下滚行面等处的油膜变薄的情况下也容易进入到该部分。作为链烷醇胺的运动粘度,在40℃下优选10~100mm2/s,在40℃下更优选40~70mm2/s。
作为链烷醇胺(叔二乙醇胺)的市售品,例如可列举出ADEKA公司制造的アデカキクルーブFM-812、アデカキクルーブFM-832等。
就上述润滑脂组合物中的链烷醇胺的配合比例而言,相对于基油和增稠剂的合计量100重量份,设为0.1~10重量份。如果不到0.1重量份,则有可能不能充分地防止氢致脆性所导致的早期剥离。另外,如果超过10重量份,则与铁的反应性过度升高,有可能产生腐蚀磨损等。优选为0.3~10重量份,更优选为0.3~5重量份,进一步优选为2~5重量份。
(b)喹啉系抗氧化剂
本发明中使用的喹啉系抗氧化剂为由下述式(1)表示的化合物即2,2,4-三甲基-1,2-二氢喹啉及其2聚体以上的缩合物(聚合物)。另外,可使用该化合物与聚合物的混合物。
[化3]
该聚合物相当于JIS K 6220-3的防老剂“TMDQ”,作为其物性,可列举出软化点80~110℃、比重1.06~1.11、灰分0.5%以下。作为本发明中能够使用的市售品,可列举出Vanderbi l t公司制造:VANLUBE RD、大内新兴化学工业公司制造:ノクラック(注册商标)224等。
就上述润滑脂组合物中的喹啉系抗氧化剂的配合比例而言,相对于基油与增稠剂的合计量100重量份,设为0.1~10重量份。如果不到0.1重量份,则有可能无法谋求高温耐久性的充分的提高。另外,如果超过10重量份,则有可能不仅性能没有提高,而且由于抗氧化剂的劣化物而蒸发等,高温耐久性反而变差。优选为0.3~10重量份,更优选为0.3~5重量份,进一步优选为2~5重量份。
(c)二硫代磷酸锌
作为本发明中使用的二硫代磷酸锌(二硫代磷酸锌;以下称为“ZnDTP”),可列举出由下述式(3)表示的二烷基二硫代二硫代磷酸锌、二芳基二硫代磷酸锌等。
[化4]
式中的R2表示碳原子数1~24的伯或仲烷基、或者、碳原子数6~30的芳基。作为R2,例如可列举出甲基、乙基、丙基、异丙基、丁基、仲丁基、异丁基、戊基、4-甲基戊基、己基、2-乙基己基、庚基、辛基、壬基、癸基、异癸基、十二烷基、十四烷基、十六烷基、十八烷基、二十烷基、二十二烷基、二十四烷基、环戊基、环己基、甲基环己基、乙基环己基、二甲基环己基、环庚基、苯基、甲苯基、二甲苯基、乙基苯基、丙基苯基、丁基苯基、戊基苯基、己基苯基、庚基苯基、辛基苯基、壬基苯基、癸基苯基、十二烷基苯基、十四烷基苯基、十六烷基苯基、十八烷基苯基、苄基等。应予说明,这些各R2可以相同,也可不同。
这些中,从稳定性优异、也有助于防止氢致脆性所导致的滚行面处的早期剥离出发,优选R2为伯烷基。另外,在R2为烷基的情况下,碳原子数越多,耐热性越优异,另外,越容易溶于基油。另一方面,碳原子数越少,耐磨损性越优异,越难以溶于基油。作为ZnDTP的优选的市售品,例如可列举出ADEKA公司制造:アデカキクルーブZ112等。
(d)有机酸的金属盐
就本发明中使用的有机酸的金属盐而言,只要是芳香族系有机酸、脂肪族系有机酸或脂环族系有机酸的金属盐(碱金属盐、碱土金属盐),则都能够使用。另外,作为有机酸,能够使用一元有机酸、多元有机酸。
如果例示有机酸的具体例,则可列举出醋酸、丙酸、丁酸、戊酸、己酸、庚酸、辛酸、壬酸、癸酸、十一酸、月桂酸、十三酸、肉豆蔻酸、十五酸、棕榈酸、十七酸、硬脂酸、十九酸、二十酸等的1元饱和脂肪酸、丙烯酸、巴豆酸、十一碳烯酸、油酸、鳕油酸等的1元不饱和脂肪酸、丙二酸、甲基丙二酸、琥珀酸、甲基琥珀酸、二甲基丙二酸、乙基丙二酸、戊二酸、己二酸、二甲基琥珀酸、庚二酸、四甲基琥珀酸、辛二酸、壬二酸、癸二酸等的2元饱和脂肪酸、富马酸、马来酸、油酸等的2元不饱和脂肪酸、酒石酸、柠檬酸等的脂肪酸衍生物、苯甲酸、邻苯二甲酸、偏苯三酸、均苯四甲酸等的芳香族有机酸。
在有机酸的金属盐中,优选钠盐。作为优选的有机酸的金属盐的具体例,可列举出苯甲酸钠、癸二酸一钠、癸二酸二钠、琥珀酸一钠、琥珀酸二钠。
(e)胺系抗氧化剂
作为本发明中使用的胺系抗氧化剂,能够使用辛基化二苯胺等的烷基二苯胺、N-苯基-1-萘胺等的公知的胺系抗氧化剂。
就上述润滑脂组合物中的(c)~(e)的添加剂的配合比例而言,相对于基油与增稠剂的合计量100重量份,优选设为0.1~10重量份。更优选为0.3~5重量份,进一步优选为0.5~1.5重量份。
以下对基油和增稠剂进行说明。
本发明的润滑脂组合物的基油不包括酯系合成油,除此以外并无特别限定,能够使用通常在润滑脂的领域中所使用的一般的基油。不包括酯系合成油的理由在于,如果在基油中使用酯系合成油,则得不到所期望的效果(后述表1的比较例6)。作为基油,例如能够使用高度精制油、矿物油、醚系合成油、合成烃油(PAO油)、硅油、含氟油及它们的混合油等。这些中,优选合成油,特别优选为选自烷基二苯醚油及PAO油中的至少1种的油。
作为烷基二苯醚油,可列举出单烷基二苯醚油、二烷基二苯醚油、多烷基二苯醚等。
PAO油为α-烯烃或被异构化的α-烯烃的低聚物或聚合物的混合物。作为α-烯烃的具体例,可列举出1-辛烯、1-壬烯、1-癸烯、1-十二碳烯、1-十三碳烯、1-十四碳烯、1-十五碳烯、1-十六碳烯、1-十七碳烯、1-十八碳烯、1-十九碳烯、1-二十碳烯、1-二十二碳烯、1-二十四碳烯等,通常使用它们的混合物。
基油的更优选的形态为以烷基二苯醚油作为必要成分、相对于基油全体含有25重量%以上(优选50重量%以上)的油。烷基二苯醚油的酸值稳定性优异,高温耐久性优异。
作为基油的运动粘度(在混合油的情况下为混合油的运动粘度),在40℃下优选10~200mm2/s。更优选为30~150mm2/s,进一步优选为30~100mm2/s。
对本发明的润滑脂组合物的增稠剂并无特别限定,能够使用通常在润滑脂的领域中所使用的一般的增稠剂。例如能够使用金属皂、复合金属皂等的皂系增稠剂、膨润土、硅胶、脲化合物、脲·氨基甲酸酯化合物等的非皂系增稠剂。作为金属皂,可列举出钠皂、钙皂、铝皂、锂皂等,作为脲化合物、脲·氨基甲酸酯化合物,可列举出二脲化合物、三脲化合物、四脲化合物、其他的多脲化合物、二氨基甲酸酯化合物等。这些中,优选使用耐热耐久性优异、对滚行面的介入性和附着性优异的脲化合物。
脲化合物通过使多异氰酸酯成分与单胺成分反应而得到。作为多异氰酸酯成分,可列举出苯二异氰酸酯、甲苯二异氰酸酯、联苯二异氰酸酯、二苯基甲烷二异氰酸酯、十八烷二异氰酸酯、癸烷二异氰酸酯、己烷二异氰酸酯等。另外,单胺成分能够使用脂肪族单胺、脂环族单胺及芳香族单胺。作为脂肪族单胺,可列举出己胺、辛胺、二十烷基胺、十六烷基胺、十八烷基胺、硬脂胺、油胺等。作为脂环族单胺,可列举出环己胺等。作为芳香族单胺,可列举出苯胺、对-甲苯胺等。
这些脲化合物中,从耐热耐久性特别优异出发,优选使用了芳香族二异氰酸酯作为多异氰酸酯成分的二脲化合物,例如使用了芳香族单胺作为单胺成分的芳香族二脲化合物、使用了脂肪族单胺作为单胺成分的脂肪族二脲化合物、使用了脂环族单胺作为单胺成分的脂环族二脲化合物的使用。特别地,从在外圈旋转用途等中油供给性优异出发,优选使用脂环族二脲化合物。
在基油中配合脲化合物等的增稠剂而得到基础润滑脂。就以脲化合物作为增稠剂的基础润滑脂而言,通过在基油中使多异氰酸酯成分与单胺成分反应而制作。基础润滑脂中所占的增稠剂的配合比例为1~40重量%,优选为3~25重量%。如果增稠剂的含量不到1重量%,则増稠效果变小,润滑脂化变得困难,如果超过40重量%,得到的基础润滑脂过度变硬,难以得到所期望的效果。
本发明的润滑脂组合物的混和稠度(JIS K 2220)优选在200~350的范围内。在稠度不到200的情况下,有可能油分离小、成为润滑不良。另一方面,在稠度超过350的情况下,润滑脂为软质、容易向轴承外流出,不优选。
在本发明的润滑脂组合物中,(a)链烷醇胺并非如与酸的盐那样为反应生成物的形式,而是在原样的状态下存在。因此,作为其他添加剂,使得不含脂肪酸等的与链烷醇胺形成盐这样的添加剂。在润滑脂组合物中,在不损害这样的本发明的目的的范围内,可根据需要含有公知的添加剂。
本发明的润滑脂组合物使用于滚动部件的润滑。例如,在滚动轴承、齿轮及它们的构成部件中,在其润滑对象部位中封入等而使用。该润滑脂组合物中所设想的使用温度例如为150℃以上,特别是180℃以上,上限为200℃左右。即,作为使用温度范围,例如为150~200℃,特别是180~200℃的范围。另外,即使在上述这样的高温气氛中并且加上急加减速这样的严酷的条件也能够适宜地利用。
对于封入了本发明的润滑脂组合物的封入润滑脂滚动轴承,基于图1来进行说明。图1为深沟球轴承的截面图。就滚动轴承1而言,将在外周面具有内圈滚行面2a的内圈2与在内周面具有外圈滚行面3a的外圈3同心地配置,在内圈滚行面2a与外圈滚行面3a之间配置多个滚动体4。利用保持器5保持该滚动体4。另外,利用密封构件6将内·外圈的轴向两端开口部8a、8b密封,至少在滚动体4的周围封入上述的润滑脂组合物7。内圈2、外圈3和滚动体4由铁系金属材料构成,润滑脂组合物7介于与滚动体4的滚行面而进行润滑。
在滚动轴承1中,构成内圈2、外圈3、滚动体4、保持器5等的轴承构件的铁系金属材料是作为轴承材料而一般所使用的任意的材料,例如可列举出高碳铬轴承钢(SUJ1、SUJ2、SUJ3、SUJ4、SUJ5等;JIS G 4805)、渗碳钢(SCr420、SCM420等;JIS G 4053)、不锈钢(SUS440C等;JIS G 4303)、高速度钢(M50等)、冷轧钢等。另外,密封构件6可以是单独的橡胶成型体或金属制,或者可以是橡胶成型体与金属板、塑料板或陶瓷板的复合体。从耐久性、固着的容易性出发,优选橡胶成型体与金属板的复合体。
在图1中,作为轴承,对于球轴承进行了例示,本发明的滚动轴承也能够作为上述以外的圆筒滚子轴承、圆锥滚子轴承、自动调心滚子轴承、针状滚子轴承、推力圆筒滚子轴承、推力圆锥滚子轴承、推力针状滚子轴承、推力自动调心滚子轴承等来使用。
实施例
通过实施例及比较例对本发明更具体地说明,但本发明绝不受这些例子限定。
实施例1~实施例5、比较例1~比较例6
在表1中所示的基油的一半量中,以该表中所示的比例溶解4,4'-二苯基甲烷二异氰酸酯(以下记为“MDI”),在剩余的一半量的基油中溶解了成为MDI的2倍当量的单胺。各自的配合比例和种类如该表所示。一边搅拌溶解了MDI的溶液一边加入溶解了单胺的溶液后,在100~120℃下继续搅拌30分钟而使其反应,使二脲化合物在基油中生成,得到了基础润滑脂。以表1中所示的配合比例向其中加入各添加剂,进一步充分地搅拌。然后,用三联辊均质化,得到了试验用的润滑脂组合物。
将得到的润滑脂组合物封入滚动轴承中,进行了以下所示的急加减速试验、高温耐久试验及锈试验。以下示出试验方法及试验条件。
<急加减速试验>
将润滑脂组合物封入到支承旋转轴的内圈旋转的滚动轴承(内圈·外圈·钢球为轴承钢SUJ2、型号:6203LLU(带有密封)),进行了急加减速试验。就急加减速试验条件而言,在室温(25℃)气氛下,使对于安装于旋转轴顶端的滑轮的承载负荷为1960N,旋转速度为0rpm~20000rpm而设定运转条件,进而,以在试验轴承内0.7A的电流进行流动的状态实施了试验。然后,计测了在轴承内发生异常剥离、振动检测器的振动成为设定值以上而停止的时间(剥离发生寿命时间、h)。将结果示于表1中。
<高温耐久试验>
将润滑脂组合物封入滚动轴承(内径20mm×外径47mm×厚14mm、型号:6204ZZ(带有密封)),在轴向负荷67N和径向负荷67N下、以轴承温度180℃、10000rpm的旋转速度使其旋转,测定直至烧结的时间(高温耐久寿命时间、h)。将结果示于表1中。
<锈试验>
基于ASTM D 1743中所规定的锈试验法,就试验条件而言,在对于生锈更为严酷的条件下进行。在预先通过有机溶剂进行脱脂、使其干燥了的圆锥滚子轴承30204中封入了得到的润滑脂组合物2.0g后,施加98N的轴向负荷,以每分钟1800转磨合了1分钟。接着,浸渍于1重量%食盐水中后,将该轴承装入在40℃下达到了饱和水蒸汽压的密封高湿容器,在40℃下放置了48小时后,考察了生锈状况。就生锈状况而言,将外圈座圈等分,计数有锈的区间,算出了生锈概率(百分率%)。将结果示于表1中。
[表1]
1)MORESCO公司制モレスコハイル-ブLB-100(40℃下的运动粘度102mm2/s)
2)新日铁住金化学公司制シンフルード801(40℃下的运动粘度46mm2/s)
3)HATCO公司制H2362(40℃下的运动粘度72mm2/s)
4)二异氰酸酯(MDI):日本ポリウレタン工业公司制ミリオネートMT
5)ADEKA公司制アデカキクルーブZ-112
6)ADEKA公司制アデカキクルーブFM-812
7)Vanderbilt Chemicals公司制VANLUBE RD
8)大内新兴化学工业公司制ノクラックAD-F(DDPA)
9)King Industries公司制NA-SUL ZS
10)MORESCO公司制モレスコアンバーSC45
如表1中所示那样,得知:各实施例具备优异的高温耐久性,同时能够抑制氢致脆性所导致的滚行面处的早期剥离的发生,进而具有充分的防锈性。另外,即使在包含本申请规定的添加剂的情况下,在进一步包含有机磺酸盐的比较例3、4中,与实施例相比,在防锈性以外也成为了差的结果。
产业上的可利用性
就本发明的润滑脂组合物而言,由于高温耐久性及防锈性优异,并且能够防止氢致脆性所导致的滚行面处的早期剥离,因此能够适合作为在高温、高速、急加减速等严酷条件下所使用的滚动轴承用的润滑剂来利用。
附图标记的说明
1 滚动轴承
2 内圈
3 外圈
4 滚动体
5 保持器
6 密封构件
7 润滑脂组合物
8a、8b 开口部
Claims (8)
1.一种润滑脂组合物,其特征在于,其为包含基油、增稠剂和添加剂的润滑脂组合物,所述基油不包括酯系合成油,
所述添加剂包含(a)链烷醇胺、(b)由下述式(1)表示的化合物或其聚合物,并且不含有机磺酸盐,
就所述(a)及(b)而言,相对于所述基油和所述增稠剂的合计量100重量份,各自含有0.1~10重量份,
2.根据权利要求1所述的润滑脂组合物,其特征在于,所述链烷醇胺为二乙醇胺。
3.根据权利要求1所述的润滑脂组合物,其特征在于,所述添加剂包含(c)二硫代磷酸锌、(d)有机酸的金属盐和(e)胺系抗氧化剂,
就所述(c)~(e)而言,相对于所述基油和所述增稠剂的合计量100重量份,各自含有0.1~10重量份。
4.根据权利要求3所述的润滑脂组合物,其特征在于,所述有机酸的金属盐为癸二酸二钠,所述胺系抗氧化剂为辛基化二苯胺。
5.根据权利要求1所述的润滑脂组合物,其特征在于,所述链烷醇胺为二乙醇胺,
所述添加剂包含(c)二硫代磷酸锌、(d)有机酸的金属盐和(e)胺系抗氧化剂,就所述(c)~(e)而言,相对于所述基油和所述增稠剂的合计量100重量份,各自含有0.1~10重量份,
所述有机酸的金属盐为癸二酸二钠,所述胺系抗氧化剂为辛基化二苯胺。
6.根据权利要求1所述的润滑脂组合物,其特征在于,所述基油为选自烷基二苯醚油及聚-α-烯烃油中的至少1种的油。
7.根据权利要求1所述的润滑脂组合物,其特征在于,所述增稠剂为脂环族二脲化合物。
8.一种封入润滑脂滚动轴承,其为封入了润滑脂组合物的封入润滑脂滚动轴承,其特征在于,所述润滑脂组合物为权利要求1所述的润滑脂组合物。
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- 2016-07-29 US US15/751,860 patent/US10597598B2/en not_active Expired - Fee Related
- 2016-07-29 CN CN201680046865.9A patent/CN107922868B/zh not_active Expired - Fee Related
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Also Published As
Publication number | Publication date |
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JP2017036385A (ja) | 2017-02-16 |
EP3336161A1 (en) | 2018-06-20 |
US10597598B2 (en) | 2020-03-24 |
WO2017026299A1 (ja) | 2017-02-16 |
EP3336161A4 (en) | 2019-02-27 |
JP6646379B2 (ja) | 2020-02-14 |
US20180230396A1 (en) | 2018-08-16 |
CN107922868B (zh) | 2021-02-26 |
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