Natural and Synthetic Ester-Containing Lubricants Having Enhanced Hydrolytic Stability
    35.
    发明申请
    Natural and Synthetic Ester-Containing Lubricants Having Enhanced Hydrolytic Stability 有权
    具有增强水解稳定性的含天然和合成含酯的润滑剂

    公开(公告)号:US20140107004A1

    公开(公告)日:2014-04-17

    申请号:US14118683

    申请日:2012-06-08

    Abstract: A lubricant composition comprising (a) from 0.1 to 10 percent by weight of one or more polyalkylene glycols (PAG); and (2) one or more ester base oils selected from the group of natural esters, synthetic esters and combinations thereof; wherein the one or more PAG has a molecular weight in the range 1500 to 5000 g/mole, comprises from 10 to 40 percent by weight of units derived from ethylene oxide and from 90 to 60 percent by weight of units derived from propylene oxide; and wherein the one or more PAGs are in the form of block copolymer, reverse block copolymer or combinations thereof is provided. Also provided is a method of enhancing the hydrolytic stability of an ester base oil.

    Abstract translation: 一种润滑剂组合物,其包含(a)0.1至10重量%的一种或多种聚亚烷基二醇(PAG); 和(2)一种或多种选自天然酯,合成酯及其组合的酯基油; 其中所述一种或多种PAG的分子量为1500至5000g / mol,包含10至40重量%的衍生自环氧乙烷的单元和90至60重量%的源自环氧丙烷的单元; 并且其中所述一种或多种PAG为嵌段共聚物的形式,提供反向嵌段共聚物或其组合。 还提供了提高酯基油的水解稳定性的方法。

    Hydraulic fluids having biodegradable polyalkylene glycol rheology modifiers useful in subsea applications

    公开(公告)号:US11505762B2

    公开(公告)日:2022-11-22

    申请号:US17281651

    申请日:2019-10-03

    Abstract: A composition comprising water, a glycol, and a polyalkylene glycol which has a biodegradability of at least 60% as determined using OECD 301F wherein the composition has a kinematic viscosity of at least 25 mm2/sec at 40° C. is useful as a rheology modifier, particularly in subsea applications. In some instances, the composition comprises 10 to 65 weight % water, 20 to 60 weight % of a glycol selected from ethylene glycol, diethylene glycol, triethylene glycol and tetra ethylene glycol, 10 to 40 weight % of a polyalkylene glycol, and 0 to 10% of additives based on total weight of the composition wherein the polyalkylene glycol has a—molecular weight of no more than 4000 g/mol and is characterized in that it is an oxyethylene/oxypropylene block copolymer having a weight percent of oxyethylene of at least 20% based on total weight of the copolymer.

    Capped oil soluble polyalkylene glycols with low viscosity and high viscosity index

    公开(公告)号:US10113134B2

    公开(公告)日:2018-10-30

    申请号:US15500412

    申请日:2015-07-21

    Abstract: A capped oil soluble polyalkylene glycol has the following structure: R1O-(AO)n—R2 where: R1 is a linear or branched alkyl or aryl with one to 18 carbon atoms; AO refers to residuals of monomers selected from 1,2-butylene oxide and 1,2-propylene oxide selected so that at least 50 weight-percent of the (AO)n component is 1,2-butylene oxide residuals; n is selected to provide a kinematic viscosity at 100 degrees Celsius of less than 5 centiStokes for the non-capped polyalkylene glycol; and R2 is a linear or branched alkyl or aryl having from 1-8 carbon atoms and wherein the capped oil soluble polyalkylene glycol is characterized by having a kinematic viscosity of less than 4.5 centiStokes at 100 degrees Celsius and a viscosity index of greater than 150.

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