Environmentally compatible hydraulic fluid
AssigneeEnBio Industries, Inc.
InventorDaniel M. da Costa
Life of this patent
Estimating the term…
Abstract
Environmentally safe and compatible fluids that are useful as lubricants, and especially as hydraulic fluids, in mobile machinery are formulated to be non-contaminating when accidentally contacted with surrounding vegetation, and removable from vegetation by simply washing the vegetation with tap water. The fluids of the invention are polyalkylene glycol-based and having an ethylene oxide to propylene oxide ratio of from about 68:32 to about 78:22.
Claims17
An environmentally compatible lubrication and hydraulic fluid for machinery, comprising:
- a polyalkylene glycol base, which is characterized in that the ethylene oxide to propylene oxide ratio of the polyalkylene glycol component of the fluid is from between about 68:32 and 78:22 by weight, and further comprises polyethylene glycol in an amount by weight of between 22.0% and 45.0%.
An environmentally compatible lubrication and hydraulic fluid comprising at least one polyalkylene glycol having an ethylene glycol content of between about 50% to about 80% by weight, at least one surfactant, at least one anti-oxidant and at least one anti-corrosion agent and, polyethylene glycol in an amount by weight of between 22.0% and 45.0%.
An environmentally compatible lubrication and hydraulic fluid comprising:
- at least one polyalkylene glycol in an amount by weight of between 50% and 85%;
- at least one surfactant in an amount by weight of between 2.0% and 6.0%;
- at least one antioxidant in an amount by weight of between 0.1% and 2.0%;
- and
- at least one anti-corrosion or anti-rust agent in an amount by weight of between 0.01% and 2.0%;
- and
- polyethylene glycol in an amount by weight of between 22.0% and 45.0% wherein the ethylene oxide to propylene oxide ratio of said fluid is between about 68:32 and 78:22 by weight.
Dependencies are inferred from the claim text.