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In our family of polyol ester,
you find high purity dipentaerythritol, pentaerythritol and
trimethylolpropane esters for use in applications where thermal
stability, high viscosity index and lubricity are essential.
Typical usages include raw material for spin finishers and
oiling agents, lubricants, lubricating oil, and as
jet engine lubricants.
 The term "polyol esters" is short for neopentyl
polyol esters which are made by reacting monobasic fatty acids
with polyhedric alcohols having a "neopentyl" structure. The
unique feature of the neopentyl structure of polyol alcohols
molecules is the fact that there are no hydrogens on the
beta-carbon. As a result, polyol esters usually have added
polarity, reduced volatility and enhanced lubricity
characteristics. This makes polyol esters ideally suited for the
higher temperature applications where the performance
of diesters and PAOs may fade.
Hatco uses many different acids and alcohols for
manufacturing polyol esters and an even greater number of
permutations are possible due to the multiple ester linkages.
The difference in ester properties as they relate to the
alcohols are primarily those related to molecular weight such as
viscosity, pour point, flash point, and volatility. The
versatility in designing these fluids is mainly related to the
selection and mix of the acids esterified onto the alcohols.
The major application for polyol esters is jet
engine lubricants where they have been used exclusively for more
than 30 years. In this application, the oil is expected to flow
at -54 C, pump readily at -40 C, and withstand sump temperature
approaching 200 C with drain intervals measured in years. Only
polyol esters have been found to satisfy this demanding
application.
Polyol esters are also the ester of choice for
blending with PAOs in passenger car motor oils. This application
reduces fuel consumption and lowers volatility in modern
specifications. They are used in 2-cycle oils for the same
reasons plus biodegradability.
Polyol esters are used extensively in synthetic
refrigeration lubricants due to their miscibility with
non-chlorine refrigerants. They are also widely used in a
variety of very high temperature applications such as industrial
oven chains, stationary turbine engines, high temperature
grease, fire resistant transformer coolants, fire resistant
hydraulic fluids, and textile lubricants.
For more information about
our extensive line of
trimethylolpropane,
pentaerythritol esters
and dipentaerythritol,
we
encourage confidential consultation with our technically trained
Business Managers who can guide you to the best products
or development programs. Given
of the
complexity involved in balancing the physical, chemical, and
performance characteristics of our extensive range of ester
products with the exact application and market needs,
this preliminary consultation
allows for the selection of the best product based on properties
determined by you or defined by your application.
You can email us at hatcoinfo@chemtura.com, or submit your requirements
using our
Ester Design Sheet. Either way you can
count on prompt and confidential service.
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