Anhydrous Polyalkylene Glycol Hydraulic Fluids

Totten, George E.; Webster, G. M.; Bishop, R.J.; Sloan, W. E.

doi:10.4271/2000-01-2557

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…12,13 PAGs are typically prepared by reacting ethylene oxide (EO) and propylene oxide (PO) with compounds containing reactive hydrogen in the presence of a basic catalyst. 14 Figure 1 shows the synthetic options for the design of such structures. Different proportions of epoxides, initiators, molecular weights, and block structures can produce products with different physical properties.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we evaluate the effect of the deep-sea environment on the thickeners of water–glycol hydraulic fluid. Polyalkylene glycols (PAGs) are the viscosity additive of water glycol hydraulic fluid with the advantages of excellent lubricity, low pour point, high viscosity index, and biodegradability compared to mineral oil and other synthetic lubricants. , PAGs are typically prepared by reacting ethylene oxide (EO) and propylene oxide (PO) with compounds containing reactive hydrogen in the presence of a basic catalyst Figure shows the synthetic options for the design of such structures.…”

Section: Introductionmentioning

confidence: 99%

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Kinematic Viscosity Prediction of Polyalkylene Glycol in a Deep-Sea Environment from Molecular Dynamics

Dingcheng,

Yipan,

Zhenyao

et al. 2023

J. Chem. Eng. Data

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinematic Viscosity Prediction of Polyalkylene Glycol in a Deep-Sea Environment from Molecular Dynamics

Dingcheng,

Yipan,

Zhenyao

et al. 2023

J. Chem. Eng. Data

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“…During the 1950s, when PAGs were first introduced, most polymers were derived from copolymers of EO and PO, which had a high EO content since water solubility was a key desired property . For example, high viscosity copolymers of EO and PO were used as viscosity builders in fire‐resistant water glycols hydraulic fluids and aqueous based quenchants . Thereafter, lower viscosity copolymers, which also had a high EO content, found use in synthetic water‐based metalworking fluids and textile lubricants .…”

Section: Introductionmentioning

confidence: 99%

“…3 For example, high viscosity copolymers of EO and PO were used as viscosity builders in fire-resistant water glycols hydraulic fluids and aqueous based quenchants. 4 Thereafter, lower viscosity copolymers, which also had a high EO content, found use in synthetic water-based metalworking fluids and textile lubricants. 5 Homopolymers of PO subsequently were developed and found use in synthetic compressor and hydraulic fluids, but the PAGs used in these formulations were not water soluble or oil soluble.…”

Section: Introductionmentioning

confidence: 99%

Performance properties of oil‐soluble synthetic polyalkylene glycols

Greaves¹,

Zaugg-Hoozemans²,

Khelidj³

et al. 2012

Lubrication Science

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Conventional polyalkylene glycols (PAGs) that are derived from the polymerization of ethylene oxide and/or propylene oxide provide many performance benefits such as excellent friction control, good low temperature properties, high viscosity indices and excellent deposit control. One limitation is their poor miscibility in hydrocarbon oils. A new range of oil‐soluble PAG base oils has been developed using butylene oxide as one of the precursors, and these provide superior miscibility in hydrocarbon base stocks. The new base oils offer many of the traditional advantages of PAGs such as high viscosity indices, good low temperature properties and good traction behaviour. In addition, they can be used as a co‐base oil or additive in hydrocarbon base stocks to improve deposit control and provide good film‐forming behaviour. Examples of their structure property relationships will be discussed and also aspects of how this technology may enable application expansion of PAGs in the future. Copyright © 2012 John Wiley & Sons, Ltd.

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A Comparison of the Performance of Environmentally Friendly Anhydrous Fire Resistant Hydraulic Fluids

Greaves¹,

Knoell

2009

Journal of ASTM International

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Many industries benefit from using fire resistant hydraulic fluids including aviation, steel processing, aluminum die-casting, marine, mining, and many more. In recent years, environmental performance has become an increasingly important feature of hydraulic fluids notably in Europe with the introduction of the European Eco-Label and in the United States with the recommendations provided by the 2002 U.S. Farm Bill for procurement of bio-based materials by Federal agencies. Environmental performance favors esters and vegetable oils as the preferred technologies today but polyalkylene glycols (PAGs) offer an alternative option although they are not derived from renewable sources. The performance of several environmentally friendly fire resistant anhydrous hydraulic fluids based on these technologies has been evaluated in laboratory bench tests. All fluids exhibit excellent hydraulic vane pump wear performance. In high temperature oxidation studies, synthetic products based on esters and PAGs, out-perform vegetable oils. Hydrolytic stability results show hydrolysis of synthetic esters and vegetable oils occurs to form acids in contrast to a PAG formulation, which is more stable. Furthermore the unique water solubility and non-sheening aspects of the PAG product indicate it may be a more favorable choice for use in applications where fluid leakage into water-ways is a concern. By understanding the performance of each product technology, direction can be provided in the type of equipment and industries where these fluids can be used and a discussion pertaining to this is presented herein.

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Anhydrous Polyalkylene Glycol Hydraulic Fluids

Cited by 5 publications

References 8 publications

Kinematic Viscosity Prediction of Polyalkylene Glycol in a Deep-Sea Environment from Molecular Dynamics

Kinematic Viscosity Prediction of Polyalkylene Glycol in a Deep-Sea Environment from Molecular Dynamics

Performance properties of oil‐soluble synthetic polyalkylene glycols

A Comparison of the Performance of Environmentally Friendly Anhydrous Fire Resistant Hydraulic Fluids

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