CN111801406B - 包含聚亚烷基二醇的润滑剂和制冷剂组合物及其用途 - Google Patents
包含聚亚烷基二醇的润滑剂和制冷剂组合物及其用途 Download PDFInfo
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Abstract
本发明涉及润滑油组合物和制冷剂组合物,其含有具有诸如法尼醇端基的萜类端基的聚亚烷基二醇。
Description
技术领域
本申请根据35U.S.C.§119(e)要求于2018年3月6日提交的在先美国临时专利申请第62/639,187号的权益,其全部内容通过引用并入本文。
本发明涉及具有萜类官能团的新型聚亚烷基二醇(PAG),其可用作润滑剂。本发明进一步涉及包含所述聚亚烷基二醇和制冷剂,特别是诸如C3-C5氢氟烯烃制冷剂的低全球变暖潜能值(GWP)制冷剂的组合物,其可以用作加热、通风以及空调(HVAC)系统的制冷回路中的传热介质,诸如冰箱、空调单元、冷却器、热泵等。
背景技术
氟烯烃(“HFO”/“氟烯烃“,诸如氢氟烯烃(HFO)制冷剂HFO-1234yf(2,3,3,3-四氟丙-1-烯)和制冷剂HFO-1234ze(1,3,3,3-四氟丙烯))被用作制冷剂(包括氯氟烃(CFC)、氢氯氟烃(HCFC)和氢氟烃(HFC))的合适的低GWP替代品,后者在历史上已被发现在制冷和空调行业中用作制冷剂。氟烯烃的全球升温潜能值(GWP)低,对臭氧层的消耗几乎没有或没有影响,因此是比其上一代更加环保的选项。氟烯烃的低全球变暖效应部分地归因于它们的化学结构中存在反应性位点(双键),因此与CFC、HCFC和HFC相比,它们的热稳定性和化学稳定性较差。尽管这种降低的稳定性在环境影响方面是有利的,但是当氟烯烃与制冷回路构造的其他组件接触时具有负面影响,因此需要在化学上稳定这种系统。因此,与此类制冷剂结合使用的制冷润滑剂必须提供针对此类制冷剂的特定性能,诸如适当的混溶性和适当的压力-粘度-温度动力学,特别是当与氟烯烃制冷剂结合使用时,必须提供适当的化学稳定性、热稳定性和水解稳定性。
已知PAG润滑剂可与氟烯烃一起使用。例如,US 2007/0069175教导了各种氟烯烃与多种润滑剂的混合物,包括PAG类型的有机润滑剂。US 2007/0069175没有教导一种结构类型的润滑剂相对于另一种结构类型的适用性。另外,该公开的内容未解决对氟烯烃型制冷剂的系统稳定性的显著影响以及因此从润滑剂的角度,特别是在润滑剂-氟烯烃体系的化学稳定化方面需要的修改。
在US 2009/0283712中教导了这种化学稳定化,其公开了将清除自由基的倍半萜烯例如法呢醇和/或法呢烯以0.001至约10重量%的剂量添加至低GWP制冷剂例如氟烯烃中,从而增加了化学稳定性,并可以在储存条件下和高温条件下减慢氟烯烃的聚合或分解,并减慢PAG压缩机润滑剂的聚合。
然而,当倍半萜烯添加到PAG-氟烯烃制冷系统中时,其稳定能力可能受到很大限制,倍半萜烯的比例也可能受到限制,其可以合理地用于制冷系统中而对其他系统组件没有潜在的不利影响。
US 7,252,779和WO2014/144554已经教导了基于羟基羧酸酯的组合物的用途,所述组合物已被证明可用作润滑剂、传热剂、流变改性剂、腐蚀抑制剂,并且可用于防止润滑剂降解。可以证明,当使用氟烯烃类型的制冷剂时,使用这种基于羟基羧酸酯的组合物对HVAC系统的润滑剂组合物的处理受到影响,并且制冷剂与基于羟基羧酸酯的组合物一起存在会不利地影响化学稳定性。
工业上仍然需要适用于与氟烯烃制冷剂一起使用的润滑剂,该润滑剂是天然稳定的,而无需进一步向系统中添加自由基清除稳定剂。
我们现已发现,在PAG润滑剂中使用特定的端基可提供稳定的好处,大大超过了将基于倍半萜烯的添加剂物理添加到制冷系统中所能达到的稳定效果,并且可以减少或消除对润滑配方中物理添加的需求,该配方通常用清除添加剂(诸如自由基和酸清除剂)稳定化。此外,将合适的端基直接包含在PAG润滑剂结构中,为掺有性能增强组分(诸如羟基羧酸酯)的体系提供了稳定化的益处。
发明内容
本发明涉及具有萜类端基的聚亚烷基二醇。
本发明提供了一种润滑油组合物,其为包含具有萜类端基的聚亚烷基二醇;制冷剂组合物,其包含制冷剂和具有萜类端基的聚亚烷基二醇;制冷系统,其包含根据本发明的制冷剂组合物;以及润滑工业或汽车系统的运动部件的方法,该方法包含将根据本发明的聚亚烷基二醇或润滑剂组合物施加至运动部件。
具体实施方式
申请人发现,将萜类作为端基直接包含在PAG润滑剂的聚合物结构中提供了稳定化的好处,该好处大大超过了通过物理添加基于萜类的添加剂而达到的那些好处,以前已经公开了的这些添加剂适合减轻化学不稳定物质(如氟烯烃制冷剂)的化学降解和热降解,在HVAC应用(诸如制冷系统)中使用时,润滑剂会与之接触。
根据本发明的PAG可以含有C2环氧烷(环氧乙烷)单体单元,C3环氧烷(环氧丙烷)单体单元和/或高级环氧烷单元,例如(C4-8)环氧烷单元。尽管可以在本发明的PAG中使用高级氧化烯单元并获得本发明的所有优点,但是本发明的经济优势是仅使用C2和/或C3环氧烷单元可以就获得其益处。因此,优选的高级(C4和更高)环氧烷单元的数目为0。环氧烷单元的总数优选为5~100,特别是5~75。
PAG可以是均聚物,或者可以含有不同单元的混合物。如果它含有不同单元的混合物,则它可以是无规共聚物或嵌段共聚物的形式。它可以是线性的或分支的,但是优选是线性的。
线性PAG将具有两个端基,分支PAG将具有三个或更多个端基。PAG还可以含有两条或多条独立的PAG链:此类多链PAG通常是通过使用多功能引发剂制备的,因此在最终产品中,两条(或更多条)PAG链将通过单个双价(或多价)端基终止。在所有情况下,至少一个端基是萜类。另一个端基也可以是萜类,但优选为氢原子、烷基,优选为C1-20烷基,特别是C1-10烷基,或酰基,优选为C1-20酰基,特别是C1-10酰基。最优选地,其他端基为氢原子。
线性PAG可以由式(I)表示:
R(RaO)x(RbO)y(RcO)zRd (I)
其中R是萜类;
Rd为萜类,例如与R相同,或为氢原子、烷基,优选为C1-20烷基,特别是C1-10烷基,或酰基,优选为C1-20酰基,特别是C1-10酰基;
x,y和z各自独立地为0或小于等于100的数字;x+y+z的总和是5~100的数字。
优选地,Rd为C1-4烷基,特别是甲基或氢原子。最优选地,Rd为氢原子。优选地,z为0。优选x为0。优选地,y为5至75。最优选地,z和x均为0,且z为5至75。在该实施方案中,PAG是聚丙二醇(PPG)的均聚物。
萜类,也称为类异戊二烯,是一组衍生自异戊二烯的化合物(甲基丁-1,3-二烯,也称为半萜烯)。每个萜类均包含一定数量的异戊二烯单元。萜类可以是环状的也可以是非环状的,包括半萜类(5个碳)、单萜类(10个碳)、倍半萜类(15个碳)、二萜类(20个碳)、二倍半萜类(25个碳)、三萜类(30个碳)、三倍半萜类(35个碳)、四萜类(40个碳原子)和多萜类(异戊二烯单元数量更多)。这些萜类中的任一种均可用于本发明。
无环天然萜类的实例包括:
优选使用法尼醇作端基。法尼醇可以由以下某些或所有异构形式组成:
在每个萜类中(半萜、单萜、倍半萜等),也存在一系列更复杂的无环醇。例如,在二萜类中众所周知的是:
也可以使用天然的环状萜类,例如(但不限于)单萜类,它们被称为萜品醇,具有以下结构式:
除了上面所有结构中所携带的羟基外或者代替上面所有结构中所携带的羟基,萜类可以带有胺、酸或酰基官能团。下面显示了倍半萜类一般结构的(E,E)几何异构体的每个实例。(Z,Z)、(E,Z)和(Z,E)异构体形式也是可能的,具有不同数目异戊二烯单元的萜类的胺、酸和酰基官能化等价物也是可能的。
在式I及其上面的优选实施方案中,优选R是法尼醇。在萜类为法尼醇的特定实施方案中,优选的合成PAG结构如下所示:
优选地,Rd=H且x=0,并且在该特别优选的实施方案中,PAG为:
法尼醇-(C3H7O)5-75-H
优选地,根据本发明的PAG的数均分子量为512至4,572g/mol。优选地,其在40℃下表现出10至460cSt的运动粘度(根据ASTM D445测量),至少150的粘度指数,至少180℃的闪点和着火点(均根据Cleveland Open Cup,COC,ASTM D92方法测量),和/或至少-40℃的流动点(根据ASTM D97方法测量)。
可以通过类似于本领域已知方法的方法来制备根据本发明的PAG。制备封端PAG的多种方法是已知的,并且可以使用任何这些方法。可以在预成型的PAG上添加一个端基,但这是一个不太优选的工艺。通常,形成PAG的工艺从含有胺、酸、酰基或醇的官能团(即带有与环氧烷反应而被提取的可提取质子)的引发剂开始,从而开始聚合反应。该反应可以例如通过与催化剂反应来提取质子,随后与环氧烷反应来进行。在本发明中,引发剂可以是含有胺、酸或醇的官能团的萜类。例如,含有可提取质子的萜类衍生物,特别是萜类醇,例如ROH,将与催化剂反应,从而充当环氧烷的聚合反应的引发剂,并且可以通过适当的环氧烷单元构建PAG链。如果使用单官能化的萜类,例如单醇,则将产生含有一个PAG链的PAG。如果期望制备具有两条或更多条PAG链的化合物,则可以使用具有两个或更多个与催化剂反应的基团(例如两个或更多个醇基)的引发剂。上式I中的萜类基团R将总是通过杂原子连接至环氧烷单元Ra/Rb/Rc,杂原子的性质取决于原始萜类中存在的官能团的性质。
效用
根据本发明的PAG可用作润滑剂,因此,本发明提供了包含根据本发明的PAG的润滑剂组合物。由于其自由基清除能力,根据本发明的PAG还可以在非润滑应用中用作化学稳定剂。
取决于特定的应用,润滑剂组合物可以包括一种或多种已知的添加剂。它们可以例如含有选自下述的添加剂:提供改善的抗磨性能、极耐压性、氧化稳定性、腐蚀抑制、消泡、抑制流动点、改善粘度指数和降低酸含量中的那些。如果存在的话,这些添加剂优选以组合物重量的至多15%的量存在。
PAG可以作为润滑剂的主要或次要成分存在,例如它可以作为唯一的润滑剂存在,或者可以与一种或多种其他润滑剂混合存在。其他润滑剂可以例如是不同的PAG润滑剂,和/或它可以是不同类型的润滑剂,例如多元醇酯、烷基苯、聚乙烯基醚和/或矿物油。
本发明的PAG或润滑剂组合物可用于例如工业和汽车应用中,其中可通过施加于设备的运动部件而用于润滑任何工业设备或车辆的运动部件。在一个优选的实施方案中,发现它在下述中的润滑剂效用:HVAC系统例如制冷系统中,特别是在空调压缩机,其他冷却系统如工业和家用制冷系统或热泵系统中,以及特别是使用氟烯烃制冷剂的那些中。
因此,本发明还提供了一种制冷剂组合物,其包含制冷剂以及根据本发明的(作为润滑剂的)PAG或润滑剂组合物。优选地,制冷剂选自HFO、HCFC、HFC、HC、CO2或NH3,尤其是HFO,特别是C3-5HFO,例如HFO-1234yf(1,3,3,3-四氟丙-1-烯)或HFO-1234ze(2,3,3,3-四氟丙-1-烯)。
根据本发明的制冷剂组合物还包括性能增强的添加剂组分,诸如染料、密封溶胀剂或润滑促进剂,其在优选的实施方案中为羟基羧酸酯。
本发明还提供了以下附加实施方案:
实施方案1.具有萜类端基的聚亚烷基二醇。
实施方案2.根据实施方案1的聚亚烷基二醇,其中所述萜类为半萜类、单萜类、倍半萜类、二萜类、二倍半萜类、三萜类、三倍半萜类、四萜类或多萜类。
实施方案3.根据实施方案2的聚亚烷基二醇,其中萜类为香叶基香叶醇、法尼醇、香叶醇、异戊烯醇、视黄醇、植醇或萜品醇。
实施方案4.根据实施方案2的聚亚烷基二醇,其中所述萜类是倍半萜类。
实施方案5.根据实施方案4的聚亚烷基二醇,其中所述萜类为法尼醇。
实施方案6.根据前述实施方案中任一项的聚亚烷基二醇,其具有式(I):
R(RaO)x(RbO)y(RcO)zRd (I)
其中R是萜类;
Ra为C2亚烷基,Rb为C3亚烷基,Rc为C4-8的亚烷基;
Rd为萜类,或为氢原子、烷基或酰基;
x,y和z各自独立地为0或小于等于100的数字;x+y+z的总和是5~100的数字。
实施方案7.根据前述实施方案中任一项的聚亚烷基二醇,其中亚烷基二醇单元是C2和/或C3单元。
实施方案8.根据前述实施方案中任一项的聚亚烷基二醇,其中一个端基为萜类,且所述或其他端基为氢原子、C1-20烷基基团或C1-20酰基基团。
实施方案9.根据实施方案8的聚亚烷基二醇,其中所述或其他端基为甲基或氢原子。
实施方案10.根据实施方案9的聚亚烷基二醇,其中所述或其他端基为氢原子。
实施方案11.根据前述实施方案中任一项的聚亚烷基二醇,其含有5-75个C3亚烷基二醇单元,并且不含C2或C(4或更多)亚烷基二醇单元。
实施方案12.根据实施方案1的聚亚烷基二醇,其具有下式:
法尼醇-(C3H7O)5-75-H
实施方案13.制备前述实施方案中任一项的聚亚烷基二醇的工艺,其包含使含有胺、酸、酰基或醇官能团的萜类与环氧烷反应。
实施方案14.根据实施方案13的工艺,其包括使含有醇官能团的萜类与环氧烷反应。
实施方案15.一种润滑油组合物,其包含实施方案1至12中任一项的聚亚烷基二醇。
实施方案16.一种制冷剂组合物,其包含制冷剂以及实施方案1至12中任一项的聚亚烷基二醇或实施方案15的润滑油组合物。
实施方案17.根据实施方案16的制冷剂组合物,其中所述制冷剂包括氟烯烃。
实施方案18.根据实施方案17的制冷剂组合物,其中所述制冷剂包括制冷剂HFO-1234yf和/或制冷剂HFO-1234ze。
实施方案19.一种制冷系统,其包含实施方案16至18中任一项的制冷剂组合物。
实施方案20.一种润滑工业或汽车系统的运动部件的方法,该方法包含将实施方案1至12中任一项的聚亚烷基二醇或实施方案15的组合物施加至运动部件。
下列实施例说明了本发明。
实施例
实施例1-16摩尔法尼醇丙氧基化物(样品“16MIFP”)
第一步,通过在105℃氮气吹扫,将222.37g的法尼醇(以“法尼醇-异构体混合物,≥95%,市售”,来自Sigma Aldrich)干燥至0.01重量%的水含量,并且用固体氢氧化钾催化至在最终产品中为0.250重量%的剂量,然后通过在105℃下的氮气吹扫再次干燥至0.01重量%的水含量。然后使该材料与522.72g的环氧丙烷在初始添加温度115℃下反应,升高至138℃,直到反应容器中的压力输出指示反应完成为止。此后,在样品测试之前,通过硅酸镁过滤介质进行压力过滤,从产物中除去催化剂。所得的聚合物包含(每个法尼醇分子)16个环氧丙烷单元,并且分子量为1151.65,并且分子量为2895.05。
实施例2-46摩尔的法尼醇丙氧基化物(样品“46MIFP”)
第一步,通过在105℃氮气吹扫,将222.37g的法尼醇(以“法尼醇-异构体混合物,≥95%,市售”,来自Sigma Aldrich)干燥至0.01重量%的水含量,并且用固体氢氧化钾催化至在最终产品中为0.250重量%的剂量,然后通过在105℃下的氮气吹扫再次干燥至0.01重量%的水含量。然后使该材料与2671.68g的环氧丙烷在初始添加温度115℃下反应,升高至138℃,直到反应容器中的压力输出指示反应完成为止。此后,在样品测试之前,通过硅酸镁过滤介质进行压力过滤,从产物中除去催化剂。所得聚合物包含(每个法尼醇分子)46个环氧丙烷单元。
实施例3:物理性能测试
根据工业标准ASTM方法对与打算用于该应用的润滑油有关的实施例1和2的产品的物理性能进行测量。结果显示在下表1中。
表1
上述物理性能数据提供了证据,证明本发明的PAG具有与PAG型润滑剂基液的期望和要求高度一致的物理特性,例如高粘度指数、高闪点和着火点、低流动点和良好的极端压力和抗磨性能。
实施例4.稳定性测试
化学稳定性、热稳定性和水解稳定性的测量是根据标准方法Ashrae 97通过密封玻璃管测试(SGT)进行的,其中待测试润滑剂、制冷剂气体(氢氟烯烃R1234yf)和铜、铝和钢的金属试样被密封在预先抽真空的玻璃管中,在175℃的温度下进行14天的固定测试。待测试润滑剂和制冷剂的使用比例相同,另外向管中添入1000ppm的水来代表制冷回路中典型的湿气污染。铜、铝和铁试样是按照标准制备的,代表了制冷回路的主要构造金属。据报道,对润滑剂和试样进行了测试前和测试后分析,以确定润滑剂和制冷剂的分解以及对金属系统组分的降解影响。每次测试均一式三份进行,为报告目的使用平均值。
SGT测试中使用的组分的定义:
“法尼醇”:法尼醇-异构体混合物,≥95%,来自Sigma Aldrich,作为添加剂添入。
“MIFP”:16MIFP(ISO粘度等级46)实施例1,如上定义。
“DEC PAG1”:分子式为CH3O(C3H6O)xCH3的聚亚烷基二醇基液,其中x是根据ASTMD445方法在40℃下最终基液粘度为46cSt的数字。该基液被广泛用于与基于HFO的制冷系统一起使用的润滑剂中,例如,它是润滑剂PSD-1(Idemitsu)和HD46(Shrieve)中的基液。
“HCAE”:在工业中建立的基于羟基羧酸酯的功能组合物,用于增强制冷系统的性能。该材料是通过在85%磷酸催化剂存在下,用正丙醇对蓖麻油进行酯交换反应制得的。在商业润滑剂ICE 32和Zerol ICE(Shrieve)中可以找到它。
稳定性测试的结果显示在表2中。在表2中,试样的定性评估如下:1A=外观不变,1B=变色但程度较小(并且没有试样降解的任何迹象),2=有显著程度的变色,并伴有试样降解的迹象。
表2中给出的结果说明了以下几点:
样品A(根据本发明的)和B(对比的)的比较表明了将法尼基官能团作为端基结合到PAG基液上的影响,这是因为除了以下“A”和“B”在结构上是相同的:“A”是在样品的末端带有法尼基和羟基官能团,相对而言“B”是两端带有甲氧基末端。该结果可以得出简单的结论,即法尼基官能团通过法尼醇的羟基官能团的烷氧基化结合到聚亚烷基二醇聚合物结构中时,仍保留了它的稳定化的能力。
样品C和D(都是对比的)考虑了现有技术的公开内容,即向低GWP制冷剂例如氟烯烃中以0.001至约10重量%的剂量作为添加剂添入清除自由基的倍半萜烯(诸如法尼醇和/或法尼烯),这会增加化学稳定性。数据表明,尽管有迹象表明,与未添加的样品B相比,TAN的增加较低,但当以1.0或10.0wt%的添加剂量率使用时,在氟烯烃与DEC PAG 1基液存在下这种清除自由基的倍半萜烯不能充分提供稳定作用(预先定义为第一产业迄今已为HFO1234yf系统采用的润滑剂基液选择)。金属试样的较差的测试后条件证明了这一点,此外,数据表明,以添加剂形式包含法尼醇实际上造成了化学不稳定。
与C和D相比,样品A的优选稳定性结果(在优选试样条件/重量变化中反映)可以被本领域技术人员合理地认为仅归因于样品A中较高的法尼基含量,因为样品A中的MIFP基液贡献了19重量%法尼基含量(基于基液的结构组成)。因此,通过对样品E和样品F进行分析,可以进一步考虑样品A所显示出的稳定性改善是否仅仅是法尼基浓度效应,还是将清除自由基的倍半萜烯掺入PAG基液结构中是否提供了本领域技术人员无法预料的益处。
基于MIFP的结构组成和使用的剂量分别为2%和1%,样品E和F(均根据本发明)的法尼基含量分别为0.38重量%和0.19重量%。样品E表现出最优异的稳定性结果,完全没有试样腐蚀,也不存在测试后TAN增加。样品F表现出测试后TAN有所增加,但这与样品C和样品D观察到的结果一致,但是,与样品B、C和D相比,试样的外观得到了显著优越的结果。可以推断出,通过使用清除自由基的萜烯,特别是萜类官能化的PAG的形式,提供了高度可接受的和出乎意料的稳定化水平,在构成低法尼基含量的剂量下提供稳定化作用。
当存在其他性能增强组分例如羟基羧酸酯时,样品G(对比的)、H(对比的)和I(根据本发明的)考虑了通过萜类官能化的PAG结构对制冷系统的潜在稳定化。有许多这样的性能增强组分的例子,这些组分本质上经常是高反应性的,并且发现与HFO型制冷剂结合对制冷系统的稳定性有非常有害的影响。因此,本发明的目的是提供一种在需要结合性能增强组分的情况下利用HFO制冷剂的稳定化系统的手段。被选择来证明本发明的一个主要实例是使用基于羟基羧酸酯(“HCAE”)的性能增强剂,如现有技术US 7,252,779和WO2014/144554中所教导的。这样的性能增强剂通常与包括“DEC PAG 1”类型的那些PAG基液组合使用。
当以12.5%的典型剂量使用HCAE来提供增强系统性能的功效所需的HCAE时,样品G清楚地证明了在HFO系统中化学去稳定化所获得的结果。测试后的TAN增加,试样外观和显著的试样重量损失清楚地表明了HCAE和HFO制冷剂的组合导致系统的化学去稳定化。因此,本发明的又一个特定方面是提供一种通过使用萜类官能化的PAG来稳定此类系统的手段。
样品H再次考虑了现有技术的公开内容,即向低GWP制冷剂例如氟烯烃中以0.001至约10重量%添加清除自由基的倍半萜烯(例如法尼醇和/或法尼烯),这会增加化学稳定性。尽管与样品G相比,测试后的TAN结果更低,且测试后的润滑剂外观得到了改善,但试样外观的下降和重量损失的增加却证明了其化学去稳定化的程度是不可接受的。
样品I提供了证据,证明了本发明的稳定化HFO制冷剂和性能增强的化学品的高反应性组合的能力。为了稳定化这样的系统,已确定萜类封端的PAG再次提供了意想不到的好处,从而发现仅通过使用能提供最佳法尼基水平剂量的MIFP才能达到可接受的系统稳定化水平,所述剂量(基于MIFP组成和剂量计为16.625%)与先前观察到的法尼基掺入PAG结构中而不是作为添加剂独立添入时所观察到的出乎意料的好处相结合。
以上结果清楚地表明,本发明的产品具有出乎意料的有利特性,使其特别适合用于利用氟烯烃制冷剂的制冷应用中,并且当已经发现其他化学反应性能增强的组分对制冷系统的稳定性有不利影响时,还可以进一步用于稳定化该制冷系统。
前述内容概述了本发明的特征和技术优点。本领域技术人员将理解,所公开的实施例可以容易地用作修改或设计用于实现本发明的相同目的的其他实施例的基础。这样等效的构造不脱离所附权利要求书中阐述的本发明的精神和范围。
Claims (19)
1.一种润滑油组合物,其包含具有萜类端基的聚亚烷基二醇,其中所述润滑油组合物还包含选自不同的聚亚烷基二醇润滑剂、多元醇酯、烷基苯、聚乙烯基醚和矿物油的一种或多种其他润滑剂。
2.根据权利要求1所述的润滑油组合物,其中,所述萜类为半萜类、单萜类、倍半萜类、二萜类、二倍半萜类、三萜类、三倍半萜类、四萜类或多萜类。
3.根据权利要求2所述的润滑油组合物,其中,所述萜类为香叶基香叶醇、法尼醇、香叶醇、异戊烯醇、视黄醇、植醇或萜品醇。
4.根据权利要求2所述的润滑油组合物,其中,所述萜类为倍半萜类。
5.根据权利要求4所述的润滑油组合物,其中所述萜类为法尼醇。
6.根据前述权利要求中任一项所述的润滑油组合物,其中所述具有萜类端基的聚亚烷基二醇具有式(I):
R(RaO)x(RbO)y(RcO)zRd (I)
其中R是萜类;
Ra为C2亚烷基;Rb为C3亚烷基;Rc为C4-8的亚烷基;
Rd为萜类,或为氢原子、烷基或酰基;
x,y和z各自独立地为0或小于等于100的数字;x+y+z的总和是5~100的数字。
7.根据权利要求1所述的润滑油组合物,其中所述具有萜类端基的聚亚烷基二醇的亚烷基二醇单元是C2和/或C3单元。
8.根据权利要求1所述的润滑油组合物,其中所述具有萜类端基的聚亚烷基二醇的一个端基为萜类,并且其他一个或多个端基为氢原子、C1-20烷基或C1-20酰基。
9.根据权利要求8所述的润滑油组合物,其中,所述具有萜类端基的聚亚烷基二醇的其他一个或多个端基为甲基或氢原子。
10.根据权利要求9所述的润滑油组合物,其中,所述具有萜类端基的聚亚烷基二醇的其他一个或多个端基为氢原子。
11.根据权利要求1所述的润滑油组合物,其中,所述具有萜类端基的聚亚烷基二醇包含5-75个C3亚烷基二醇单元,并且不包含C2或C(4或更多)亚烷基二醇单元。
12.根据权利要求1所述的润滑油组合物,其中,所述具有萜类端基的聚亚烷基二醇具有下式:
法尼醇-(C3H7O)5-75-H。
13.根据权利要求1所述的润滑油组合物,其还包含一种或多种添加剂,所述添加剂选自提供改善的耐磨性能、耐极压性、氧化稳定性、腐蚀抑制、消泡、抑制流动点、改善粘度指数和减少酸含量中的那些。
14.一种制冷剂组合物,其包含制冷剂以及权利要求1至12中任一项所述的具有萜类端基的聚亚烷基二醇或权利要求1至13中任一项所述的润滑油组合物。
15.根据权利要求14所述的制冷剂组合物,其中,所述制冷剂包括氟烯烃。
16.根据权利要求15所述的制冷剂组合物,其中,所述制冷剂包括制冷剂HFO-1234yf和/或制冷剂HFO-1234ze。
17.根据权利要求14至16中任一项所述的制冷剂组合物,其中,所述制冷剂选自氢氟烯烃(HFO)、氢氯氟烃(HCFC)、氢氟烃(HFC)、烃(HC)、CO2或NH3或它们的组合。
18.一种制冷系统,其包含权利要求14至17中任一项所述的制冷剂组合物。
19.一种润滑工业或汽车系统的运动部件的方法,该方法包含:将权利要求1至13中任一项所述的润滑油组合物施加至运动部件。
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