CN1322104C - 用于等速万向节的润滑脂组合物 - Google Patents

用于等速万向节的润滑脂组合物 Download PDF

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CN1322104C
CN1322104C CNB008049920A CN00804992A CN1322104C CN 1322104 C CN1322104 C CN 1322104C CN B008049920 A CNB008049920 A CN B008049920A CN 00804992 A CN00804992 A CN 00804992A CN 1322104 C CN1322104 C CN 1322104C
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grease composition
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尾崎幸洋
吉田强
益森隆一
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Shell Internationale Research Maatschappij BV
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Abstract

用于等速万向节的含有基础油和尿素基增稠剂的润滑脂组合物,该润滑脂还含有,(A)0.1-10%(重量)任意取代的含有至少5个环原子的钼-有机环状化合物,其中每个直接连接到钼原子上的环原子是杂原子,(B)0.1-5%(重量)的至少一种选自硫化烯烃、硫-磷耐特压添加剂、无灰二硫代氨基甲酸盐、聚硫化物、噻二唑和二硫代氨基甲酸锌的含硫添加剂,和(C)0.1-5%(重量)的至少一种选自二硫代磷酸钼,二硫代磷酸锌和三苯基偶磷硫代硫酸盐的含磷添加剂;一种润滑等速万向节的方法,包括将所述的润滑脂填充到等速万向节中,和填充有所述润滑脂的等速万向节。

Description

用于等速万向节的润滑脂组合物
本发明涉及用于等速万向节的润滑脂组合物,润滑等速万向节的方法和充填润滑脂的等速万向节。
等速万向节可用于前置式发动机/前轮驱动汽车、具有独立悬架的汽车、4轮驱动车辆。等速万向节是专用的一类万向联轴节,该万向联轴节可在恒定旋转速度下将推进力从末级减速齿轮传递到车轮轴杆。两种主要类型的等速万向节是插入式(plunging)和固定式等速万向节,它们通常以合适的结合方式用于车辆中。
需要大功率的汽车发动机、较小的和较轻的等速万向节(在下文缩写成CVJ)和较大的安装角的趋势提高了对CVJ的要求,并且导致了接合点温度升高的趋势。
在传递扭矩时插入式等速万向节旋转,从而在轴方向上产生滑动阻力,这样就会引起汽车振动、发出噪音和小的横摇,特别是在某些行车条件下更是如此这些噪音、振动和晃动对车辆上的乘客来说是不愉快的。
为了克服这些问题,已经研究出了对CVJ工作表面的对策。通常将润滑组合物用于其他的汽车,例如内燃式发动机汽车中,但是当这种组合物用于CVJ时却不能提拱足够的润滑作用。然而,某些专门开发出的低摩擦润滑脂已经在降低CVJ中摩擦阻力方面显示出是有效的。
众所周知,含有二硫化钼,脂肪和油硫化物,硫化烯烃,铅化合物等的耐特压锂皂润脂油可用于CVJ的润滑。近来,增加了对含有附加的二烷基二硫代氨基甲酸钼硫化物的尿素润滑脂的应用,该润滑脂显示出对摩擦有用的性能。
例如,日本审查的专利公开号H4-34590公开了用于汽车等速万向节的含有尿素润滑脂的润滑脂组合物,该润滑脂组合物含有作为必要组分的(1)二烷基二硫代氨基甲酸钼硫化物和(2)一种或多种选自脂肪和油硫化物、硫化烯烃、磷酸三甲苯酯、三烷基硫代磷酸盐和二烷基二硫代磷酸锌的硫-磷耐特压添加剂。
关于尿素润滑脂的类似技术公开在下列专利的说明书中:日本审查的专利公开号H5-79280和H8-23034,日本未经审查的专利申请号H4-178499,H4-304300,H4-328198,H6-57283,H6-57284,H6-100878,HH6-184583,H9-194871,H9-324190,H10-183161,H10-273691和H10-273692,和美国专利号4840740,5160645和5499471。这些文献涉及通过将二烷基二硫代氨基甲酸钼加入到尿素润滑脂中,并且还加入其他添加剂如二磕代磷酸锌来降低摩擦和磨损。
人们不断地需要可降低摩擦、改善振动性能和CVJ性能的低成本高性能润滑脂。
然而,可用于降低摩擦和磨损的二烷基二硫代氨基甲酸钼硫化物是很昂贵的,因此,很难降低使用了这种添加剂的润滑脂的成本。此外,即使使用二烷基二硫代氨基甲酸钼藕化物,也很难改善上述不同的专利说明书所达到的性能指标,因此该技术是受到限制的。
因此,本发明的目的是提供新的用于等速万向节的润滑脂组合物,该组合物可非常有效地降低摩擦和磨损,并且不合二烷基二硫代氨基甲酸钼硫化物,一般地说不含二烷基二硫代氨基甲酸钼。
为了实现这一目的,本发明人制备了各种润滑脂细合物,并根据ASTM D5707中规定的试验法研究了这些组合物作为等速万向节润滑脂的摩擦和磨损性能,即:使用SRV(schwingung reibung und verschleiss)试验装置,并且已经鉴别了一种新的比常规润滑脂更能降低摩擦和磨损的等速万向节润滑脂组合物。
因此,本发明提供了用于等速万向节的润滑脂组合物,该组合物含有基础油和尿素基增稠剂,该润滑脂还含有,
(A)0.1-10%(重量)任意取代的含有至少5个环原子的钼-有机环状化合物,其中每个直接连接到钼原子上的环原子是杂原子。
(B)0.1-5%(重量)的至少一种选自硫化烯烃、硫-磷耐特压剂、无灰二硫代氨基甲酸盐、聚硫化物、噻二唑和二硫代氨基甲酸锌的含硫添加剂,和
(C)0.1-5%(重量)的至少一种选自二硫代磷酸钼、二硫代磷酸锌和硫代磷酸三苯酯的含磷添加剂。
可用于本发明的润滑脂中的基础油与润滑油通常所选用的基础油类型相同。这些基础油可以是矿物和/或化学合成来源。矿物来源的基础油可以是矿物油,例如由溶剂精制或加氢处理生产的那些矿物油。化学合成来源的基础油一般可以是C10-C50烃聚合物的混合物,例如α-烯烃的液体聚合物。基础油也可以是这些油的混合物。优选的基础油是矿物来源的。
可方便使用的矿物油的例子包括由Royal Dutch/Shell Group公司以“HVI”或“MVIN”名称销售的那些矿物油。也可使用由蜡的加氢异构化制备的聚α烯烃和基础油,例如由Royal Dutch/Shell Group公司以“XHVI”(商标)名称销售的那些基础油。
任何尿素化合物可用作尿素-基增稠剂。其例子包括单-,二-,三-和四尿素。也可使用含尿素,例如尿素-氨基甲酸乙酯化合物和尿素-酰亚胺化合物的各种增稠剂。润滑脂组合物优选含有2-20%(重量),更优选5-20%(重量)的尿素增稠剂(以组合物总重量计)。
本发明的任意取代的钼-有机环状化合物(A)含有至少5个环原子,包括至少一个钼原子。环原子是在钼-有机环中的原子,该环优选是单环,即它不构成螺-、二-或多环体系的一部分。连接到钼原子上的每个环原子都是杂原子,优选氧,氮或硫原子,最优选氧原子。
该任意取代的钼-有机环状化合物(A)优选含有5-12个环原子,更优选5-8个环原子。除钼环原子外,环原子优选主要是有机性质的。优选的环原子是碳原子和杂原子,例如氧,氮,硫和磷原子。适合于本发明的任意取代的钼有机环状化合物(A)可使用类似于和根据美国专利4889647,5412130和5137647所描述的反应得到。
优选的化合物(A)是任意取代的1,3-杂原子-2-钼-2,2-二氧代有机环状化合物。
钼有机环状化合物(A)的任意取代基包括含有1-50个碳原子的烷基,链烯基,芳基,烷芳基,脂肪族残基,和分子量为150-1200的聚烯烃残基。优选的这种烷基,链烯基,芳基,或烷芳基主要是烃基。
(A)的任意脂肪族残基取代基可以衍生自脂肪油或脂肪酸。脂肪油是脂肪酸的甘油酯。这样的酯通常被称为植物油或动物油。化合物(A)的特别有效的脂肪族残基取代基是由椰子,玉米,棉籽,亚麻子,花生,大豆和向日葵籽的脂肪油得到的。还可使用被动物脂肪族残基如牛油的脂肪族残基取代的化合物(A)。该脂肪族残基可以是饱和的或不饱和的。特别有效的残基是来自月桂酸,棕榈酸,硬脂酸,油酸,亚油酸,和亚麻酸的残基优选的脂肪族残基取代基是式-CH2OCOR和-COR基团,其中R是优选含有至少8个碳原子,更优选8-24个碳原子和最优选8-18个碳原子的脂肪族残基,优选脂肪酸残基。优选的脂肪族残基R主要是烃基,优选具有的非烃基含量小于25%(重量),更优选小于10%(重量)的烃基,最优选是烃基。
化合物(A)的任意的聚烯烃残基取代基可以是饱和的或不饱和的,并且可以由聚α烯烃,优选聚丙烯,聚丁烯和/或聚异丁烯得到。
优选的钼-有机环状化合物(A)是下列通式的化合物
Figure C0080499200071
或它们的混合物,其中X1和X2选自氧,硫和氮,其中当X1是氧或硫时,n是1,当X1是氮时,n是2,当X2是氧或硫时,m是1,当X2是氮时,m是2,其中R1,R2,R3,R4和R5各自独立地表示氢原子或含有1-50个碳原子的烷基,链烯基,芳基,或烷芳基,或脂肪族残基,或分子量为150-1200的聚烯烃残基。
优选的是,R1,R2,R3,R4和R5各自独立地表示氢原子或上述脂肪族残基。X1和X2优选表示氧原子。
特别优选的钼-有机环状化合物(A)是下列通式的化合物
或下列通式的化合物
Figure C0080499200074
或它们的混合物,其中R表示脂肪族残基,优选脂肪酸残基,该残基优选含有至少8个碳原子,更优选8-24个碳原子,最优选8-18个碳原子。优选的脂肪族残基R主要是烃表优选具有的非烃基含量小于25%(重量),更优选小于10%(重量)的烃基,最优选是烃基。
优选的任意取代的钼-有机环状化合物(A)可通过i)具有12或更多个碳原子的脂肪油,ii)二乙醇胺,和iii)钼源反应得到。该化合物可使用根据和类似于美国专利4889647中所述的那些反应得到。
通过i),ii)和iii)反应得到的化合物(A)的主要成分被认为是上述通式(3)和(4)的化合物。
适用于i),i)和iii)反应的脂肪油包括含具有8-24个碳原子,优选8-18个碳原子的脂肪酸残基的脂肪油。该油通常被称为植物油或动物油。可方便使用的植物油包括由椰子,玉米,棉籽,亚麻子,花生,大豆和向日葵籽得到的油。还可使用动物脂肪油如牛油。钼源可以是含氧的钼化合物,该化合物可通过与脂肪油和二乙醇胺的反应产物反应形成酯类型钼配合物。该钼源的具体例子包括钼酸铵,氧化钼和它们的混合物。
相对于尿素基润滑脂的总量,在本发明润滑脂中钼-有机环状化合物(A)的存在量为0.1-10%(重量),优选0.5-5%(重量),更优选1-4%(重量),最优选1.5-3.5%(重量)。如果该量低于0.1%(重量),那么降低摩擦就不充分,然而若使用超过10%(重量)的量也不会看出在效果上有进一步的改善。
 尤其适用于本发明润滑脂组合物的钼-有机环状化合物(A)是“Molyvan855”(Molyvan是Vanderbilt公司的商标)。
用于本发明的(B)组分是选自硫化烯烃,硫-磷耐特压添加剂,无灰二硫代氨基甲酸盐,聚硫化物,噻二唑和二硫代氨基甲酸锌的含硫添加剂。不管这些添加剂是单独使用或是以混合物形式使用,它们的用量相对于尿素基润滑脂的总量为0.1-5%(重量),优选0.5-2%(重量)。如果该量低于0.1%(重量),那么降低摩擦就不充分,然而若使用超过5%(重量)的量也不会看出在效果上有进一步的改善。
作为含硫添加剂(B),优选使用硫-磷耐特压添加剂,例如“Anglamol 99M(Anglanmol是lubrizol公司的商标)。
用于本发明的(C)组分是选自二硫代磷酸钼,二硫代磷酸锌和硫代磷酸三苯酯的含磷添加剂。不管这些添加剂是单独使用或是以混合物形式使用,它们的用量相对于尿素基润滑脂的总量为0.1-5%(重量),优选0.5-2%(重量)。如果该量低于0.1%(重量),那么降低摩擦就不充分,然而若使用超过5%(重量)的量也不会看出在效果上有进一步的改善。
优选的含磷添加剂(C)选自二硫代磷酸钼和二硫代磷酸锌。
可用作组分(C)的二硫代磷酸钼或二硫代磷酸锌优选选自二烷基-、二芳基-或烷芳基-二硫代磷酸钼或锌,在该二硫代磷酸盐中烷基部分是直链减支链的,并优选含有最多12个碳原子。
在本发明组合物中润滑脂还可含有各种已知的添加剂,例如抗氧化剂,防锈剂,耐特压添加剂/抗磨剂,油改进剂和增稠剂。
本发明还提供了润滑等速万向节的方法,该方法包括用本发明的润滑脂填充等速万向节,本发明还提供了填充有本发明润滑脂的等速万向节。
等速万向节可以是插入式等速万向节,固定式等速万向节,高速万向接头,该高速万向接头可包括固定式或插入式等速万向节。本发明的润滑脂特别适用于插入式等速万向节。
现在参考下列实施例来说明本发明。
实施例1-8和对比实施例1-11
制备润滑脂组合物
通过将各种添加剂加入到基础润滑脂中,然后用3-辊磨处理得到本发明的润滑脂组合物和对比润滑脂组合物。本发明的润滑脂组合物(实施例1-8)显示在表1中,对比润滑脂组合物(对比实施例1-11)显示在表2中。
基础润滑脂1-3的制备如下。对于每种润滑脂,使用粘度为100℃下约11平方毫米/秒的纯化矿物油作为基础油。
1.双脲润滑脂
在5400克基础油中1摩尔4,4,-二苯基甲烷二异氰酸酯和2摩尔辛胺反应。将得到的尿素化合物均匀地分散在整个油中得到具有用过的润滑脂的针入度(25℃,60击(strokes))为:301dmm和滴点为:>270℃的润滑脂产物。该尿素化合物的含量为约10%(重量)。
2.四脲润滑脂
在5100克基础油中将2摩尔4,4′-二苯基甲烷二异氰酸酯,1摩尔辛胺,1摩尔月桂胺和1摩尔乙二胺反应。将得到的尿素化合物均匀地分散在整个油中得到具有用过的润滑脂的针入度(25℃,60击(strokes))为:308dmm和滴点为:254℃的润滑脂产物。该尿素化合物的含量为约15%(重量)。
3.锂皂润滑脂
将150克12-羟基硬脂酸锂溶解和均匀分散在1350克基础油中,得到用过的润滑脂的针入度(25℃,60击)为:275dmm和滴点为:199℃的润滑脂产物。锂皂的含量是10%(重量)。
将下面1)-10)所示的化合物作为添加剂用于表1和2的润滑脂组合物中。
1)Molyvan 855(Molyvan是Vanderbilt公司的商标)作为有机钼配合物(Mo-配合物)。
2)Anglamol33(Anglamol是Lubrizol公司的商)作为硫化烯烃。
3)Anglamol99M(Anglamol是Lubrizol公司的商标)作为硫-磷体系。
4)Vanlube7723(Vanlube是Vanderbilt公司的商标)为无灰二硫代氨基甲酸盐。
5)TPS32(法国ElfAtochem公司产品的商品名)作为聚硫化物。
6)Vanlube829(Vanlube是Vanderbilt公司的商标)作为噻二唑。
7)Vanlube AZ(Aanlube是Vanderbilt公司的商标)作为二硫代氨基甲酸锌(Zn-DTC)。
8)Sakuralube300(Asahi Denka K. K.的产品商品名)作为二硫代磷酸钼(Mo-DTP)。
9)由Lubrizol公司得到的二硫代磷酸锌(Zn-DTP)。
10)Irgalube TPPT(Irgalube是Ciba-Geigy公司的商标)作为硫代磷酸三苯酯(TPPT)。
试验条件
按照ASTM D5707的方法,对表1和2的润滑脂组合物进行SRV试验,测定这些组合物的摩擦和磨损性能。
作为测试预目,使用10毫米直径的标准滚珠(材料为DIN100Cr6),直径和厚度为2.4X735毫米的标准板(材料为DIN100Cr6)。试验期间施加50N的负荷30秒,然后施加200N的负荷30分钟。所用频率为50赫兹,试验温度是50℃。摩擦系数是在试验结束时在15秒针内测量的摩擦系数平均值。磨损数值是以在试验结束时测量的滚珠磨痕直径。测量结果列于表1和2。
表1
                实施例    1   2     3     4     5     6     7     8
基础润滑脂%W 1.双脲润滑脂2.四脲润滑脂    -95.5   95.5-     94.5-     95.0-     -94.5     -95.5     95.5-     95.5-
添加剂%W   A 有机Mo-配合物1)    3   3     3     3     3     3     3     3
B 硫化烯烃2)硫-磷3)无灰二硫代氨基甲酸盐4)聚硫化物5)噻二唑6)Zn-DTC7)    1-----   ---1--     -1----     -1---0.5     -1----     -1----     --1---     ----1-
C Mo-DTTP8)Zn-DTP9)TPPT10)    -0.5-   --0.5     10.5-     --0.5     10.5-     -0.5-     --0.5     --0.5
                合计    100.0   100.0     100.0     100.0     100.0     100.0     100.0     100.0
SRV试验(ASTM D5707)结果 摩擦系数    0.068   0.062     0.067     0.070     0.068     0.070     0.065     0.075
滚珠磨痕(mm)直径    0.46   0.44     0.45     0.48     0.42     0.45     0.44     0.42
表2
        对比实施例    1     2     3     4     5     6     7     8     9     10     11
基础润滑脂%W 1.双脲润滑脂3.锂皂润滑脂    97-     96-     96-     96-     96-     96-     96-     96-     96-     95-     -95.5
添加剂%W   A 有机Mo-配合物1)    3     3     3     3     3     3     3     3     3     3     3
B 硫化烯烃2)硫-磷3)无灰二硫代氨基甲酸盐4)聚硫化物5)噻二唑6)Zn-DTC7) ------ ------ 1----- -1---- --1--- ---1-- ----1- -----1 ------ ------ --1---
C Mo-DTP8)Zn-DTP9)TPPT10)    ---     -1-     ---     ---     ---     ---     ---     ---     1--     11-     --0.5
             合计    100.0     100.0     100.0     100.0     100.0     100.0     100.0     100.0     100.0     100.0     100.0
SRV试验(ASTMD5707)结果 摩擦系数    0.110     0.110     0.085     0.091     0.085     0.097     0.107     0.084     0.117     0.110     0.130
滚殊磨痕(mm)直径 0.50 0.62 0.48 0.48 0.46 0.44 0.43 0.57 0.53 0.65 0.57
从表1可以看出,实施例1-8的润滑脂组合物具有低的摩擦系数并提供了好的耐磨性。另一方面,从表2的结果可以看出,没有组分(B)和/或(C)的尿素润滑脂具有高的摩擦系数,耐磨性差(对比实施例1-10)。
对应于操作实施例7的对比实施例11中使用了锂皂润滑脂。对比实施例11的摩擦系数和耐磨性较差,因比如果使用该润滑脂那么减少摩擦和磨损的效果将较差。

Claims (8)

1.用于等速万向节的含有基础油和尿素基增稠剂的润滑脂组合物,该润滑脂组合物还含有,
(A)1-4%重量任意取代的含有5-8个环原子的钼-有机环状化合物,其中每个直接连接到钼原子上的环原子是杂原子,并且所述钼-有机环状化合物的任意取代基选自含有1-50个碳原子的烷基、链烯基、芳基、烷芳基或脂肪族残基,或分子量为150-1200的聚烯烃残基;
(B)0.1-5%重量的至少一种选自硫化烯烃、硫-磷耐特压添加剂、无灰二硫代氨基甲酸盐、聚硫化物、噻二唑和二硫代氨基甲酸锌的含硫添加剂,和
(C)0.1-5%重量的至少一种选自二硫代磷酸钼、二硫代磷酸锌和硫代磷酸三苯酯的含磷添加剂。
2.根据权利要求1的润滑脂组合物,其中(A)是任意取代的1,3-杂原子-2-钼-2,2-二氧代有机环状化合物。
3.根据权利要求2的润滑脂组合物,其中(A)是下列通式的化合物
Figure C008049920002C2
或它们的混合物,其中X1和X2选自氧,硫和氮,其中当X1是氧或硫时,n是1,当X1是氮时,n是2,当X2是氧或硫时,m是1,当X2是氮时,m是2,其中R1,R2,R3,R4和R5各自独立地表示氢原子或含有1-50个碳原子的烷基,链烯基,芳基,或烷芳基,或脂肪族残基,或分子量为150-1200的聚烯烃残基。
4.根据权利要求3的润滑脂组合物,其中(A)是下列通式的化合物
或下列通式化合物
Figure C008049920003C2
或它们的混合物,其中R表示脂肪族残基。
5.根据权利要求4的润滑脂组合物,其中(A)可通过i)具有12或更多个碳原子的脂油,ii)二乙醇胺和iii)钼源反应得到。
6.根据权利要求1-4之任一项的润滑脂组合物,其中至少一种含硫添加剂(B)是硫-磷耐特压添加剂。
7.根据权利要求1-4之任一项的润滑脂组合物,其中至少一种含磷添加剂(C)选自二硫代磷酸钼和二硫代磷酸锌。
8.一种润滑等速万向节的方法,包括用权利要求1-4之任一项的润滑脂组合物填充到等速万向节。
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BR0008999B1 (pt) 2010-11-30
DE60001160T2 (de) 2003-08-21
PL197499B1 (pl) 2008-04-30
AR022922A1 (es) 2002-09-04
EP1169421A1 (en) 2002-01-09
PL349807A1 (en) 2002-09-09
KR20020009578A (ko) 2002-02-01
JP2009167422A (ja) 2009-07-30
KR100675060B1 (ko) 2007-01-26
CA2364594C (en) 2008-03-11
WO2000055284A1 (en) 2000-09-21
ZA200107489B (en) 2002-11-27
EP1169421B1 (en) 2003-01-08
CN1782051A (zh) 2006-06-07

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