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Hatco offers a wide range of
trimellitates for use in applications where lubricity,
hydrolytic stability and low odor are critical. Usages include
oiling agent for textile, plastic lubricant, and additive for
plastic processing.
Trimellitates are aromatic triesters which are
similar to the phthalates described under diesters but with a
third ester linkage. By taking on three alcohols, the
trimellitates are significantly more viscous then the linear
adipates or phthalates with viscosities ranging from about 9 to
20 cSt at 100 C. Like phthalates, trimellitates have a low
viscosity index and poor biodegradability and their price is
between adipates and polyols.
Trimellitates are generally used
where high viscosity is needed as in gear lubricants, chain
lubricants, and grease.
These materials are
produced by the esterification of a range of alcohols with
trimellitic anhydride (TMA, which is similar in structure to
phthalic anhydride with the exception of a third functionality
on the aromatic ring. Consequently, esters are produced in the
ratio of three moles of alcohol to one mole of anhydride. Common
esters in this family are Tris-2-ethyhexyl trimellitate (Tri-octyl
trimellitate - TOTM),
triisodecyl trimellitate
(an ester of mixed semi-linear C10 alcohols), and
1,2,4-Benzenetricarboxylic acid decyl octyl ester, (an ester of
mixed C8 and C10 linear alcohols).
The principle
features of these esters, when processed with PVC, is their low
volatility, and consequently large volumes of trimellitate
esters are used in high specification electrical cable
insulation and sheathing. The extraction and migration
resistance of these materials are also significantly improved
relative to the phthalates. The low volatile loss also results
in usage in automotive interior applications where the issue of
windscreen fogging is important. In this respect they often
compete with the linear high molecular weight phthalates such as
911P.
For more information about
our extensive line of tribasic esters,
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 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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