![]() ![]() Although they are excellent lubricants, they can pose a logistic problem in plants. They should not be mixed with mineral oils. Water-soluble polyglycols are not compatible with mineral oils and therefore must be handled and disposed of separately. They are used as compressor oils in rotary screw and reciprocating units, worm gear oils, fire-resistant lubricants, metal-working fluids and as brake fluids. Some versions are food grade and biodegradable. They burn off cleanly, leaving no residue, and have been used as a carrier oil for solid lubricants for high-temperature chain lubrication. They have a very high viscosity index (180 to 280) and good low and high temperature abilities. ![]() Polyglycols are moderately polar, which gives them moderate film strength properties. The most common are the water-soluble fluids, and thus they can have some very different properties. These fluids can be manufactured to be either water soluble or water insoluble (oil soluble). ![]() The terms polyalkylene glycol and polyglycol are used interchangeably. ![]()
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