Examples of 'viscosity index' in a sentence
Meaning of "viscosity index"
Viscosity index is a measurement used in the field of rheology to quantify the resistance of a fluid to flow or change in consistency. It determines how well a lubricant can maintain its viscosity and fluidity under different temperatures and shear conditions. Higher viscosity index values indicate that the fluid's viscosity changes less with temperature fluctuations
How to use "viscosity index" in a sentence
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viscosity index
Viscosity index is used to characterise base oil.
Environmentally friendly viscosity index improving compositions.
Process for producing oils with a high viscosity index.
Typically high viscosity index is preferred.
Resistance to thinning with increasing temperature is called viscosity index.
Production of high viscosity index lubricants.
Use as viscosity index improvers in car engine lubricating oils.
A high and stable viscosity index.
A very high viscosity index and high resistance to shearing.
What are viscosity and viscosity index.
Viscosity index has been found to increase with lower branch ratio.
This polymethacrylate is used as viscosity index improver additive.
The viscosity index indicates the connection between viscosity and temperature.
Viscosity and viscosity index.
Extensive branching in a molecule usually results in a low viscosity index.
See also
Lubricant composition containing a viscosity index improver having dispersant properties.
Shear stability is a desirable property in polymers used as viscosity index improvers.
Viscosity index improvers which can be used include polymethacrylate and polybutene.
Process for the production of high viscosity index lubricants.
The viscosity index of a hydrocarbon lube oil is related to its molecular configuration.
Compositions of the invention additionally contain a viscosity index modifier.
Other examples of viscosity index modifier dispersants are given later in this specification.
Process for the preparation of dispersant viscosity index improvers.
Viscosity index improver dispersants function as dispersants as well as viscosity index improvers.
These materials are also often referred to as viscosity index improvers.
Polymeric viscosity index additive and oil composition comprising the same.
Such base oils may contain a viscosity index improver if desired.
Hydrocarbon base oil for lubricants with very high viscosity index.
A high viscosity index increases the temperature range in which the lubricant is suitable.
Preferred lubricating compositions also contain a viscosity index improver dispersant.
A viscosity index improver dispersant functions both as a viscosity index improver and as a dispersant.
The copolymers are disclosed to be useful in lubricating oils as viscosity index improvers.
A high viscosity index signifies that the temperature dependence of the fluid is small.
Said process can separate oils in accordance with their viscosity index.
Viscosity index also plays a crucial role when temperatures are known to fluctuate widely.
It can also convert heavier feeds to oils with a high viscosity index.
Viscosity index improvers are also added to have limited viscosity variation with the temperature.
Such polymers include those useful as lubrication and viscosity index improvers.
The preparation of high viscosity index lubricating base oils can be carried out as follows.
A decline is fundamentally attributed to the loss of additives which improve the viscosity index.
Viscosity index is a property characterizing the relationship between the viscosity of a fluid and temperature.
Viscosity improvers are usually polymeric materials and are often referred to as viscosity index improvers.
The resulting product contained the viscosity index improver graft polymer of the present invention.
It is generally known to incorporate in lubricants thickeners which have a viscosity index improving effect.
Examples of the pour point depressant and viscosity index improver include polymethacrylates and polyolefins.
Catalytic hydrotreatment allows production of lubricating base oils having a higher viscosity index.
Many synthetic oils inherently provide the viscosity index required for multigrade oils.
The result is a base oil with extremely good oxidation resistance and viscosity index.
The present invention provides such multifonctional viscosity index improvers and oil compositions containing same.
The tetrablocks significantly improve low temperature performance of the polymers as viscosity index improvers.
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