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Reaction Solvent
As DMI is thermally and chemically stable, its dissolving power for organic
and inorganic compounds in addition to its accelerating effect as an aprotic polar
solvent, makes it an exceptionally effective reaction solvent. By applying DMI,
reaction products of high purity can be obtained in a short time at a higher yield.
It is effective for various nucleophilic substitution reactions such as the
synthesis of phenylether derivatives, amino compounds and fluorobenzene derivatives
as illustrated below. Its high dielectric constant and solvation effect accelerate
anionic nucleophilic reaction through solvation of cations. These synthesis products
are used as intermediates in agrochemicals, medicines, dyestuffs and monomers
of high performance resins.
Polymers
DMI is uniquely suited for the manufacture of heat resistant thermoplastics
and can be effectively used as a solvent for synthesis of various polymers and
a cleaning agent for polymerization and molding equipment. In the production of
polyamides and polyimides, DMI accelerates the formation of amide and imide groups
to produce high molecular weight polymers. In the production of polyphenylenesulfides,
products containing smaller amounts of organic impurities are acquired in electric
materials. In the production of polyethersulfones, DMI controls side reactions
to produce polymers of high quality. In the formation of polyimide and polysulfone
films and the stretching of polyetherketone film, treatment of DMI makes films
more uniform.
Detergents
By adding DMI to a mixture of surfaceactive agents, alkalines, alcohols, and
polyoxyethylenealkylethers, an effective detergent can be obtained. It also makes
an effective cleaning solution for glass and metal since it dissolves dirt easily.
Dyestuffs and Pigments
Higher contrast, clear printed images can be obtained by adding DMI as an ink
solvent with dyestuffs and pigments.
Electric Materials
Due to its low viscosity and high dielectric constancy, DMI can be used as
a solvent for electrolytic solutions of non-aqueous batteries. In addition, it
can be used as a stripper for photo-resist, and unlike conventional strippers,
does not involve a series of complicated processes because of water insolubility
or a resulting adverse impact on the environment.
Surface Treatment Agent
To increase adhesive strength of epoxy resin adhesives, a DMI solution of SDN
(polyaryl complex of sodium, potassium or lithium), is used for surface treatment
of TEFLON® (polytetrafluoroethylene).
Petroleum Products
DMI has a high boiling point, high thermal stability and doesn't produce azeotrope,
therefore it can be used commercially as a solvent in processes such as liquid-liquid
extraction, counter current distribution, extractive distillation and counter
current washing process.
Since DMI dissolves aromatic compounds, unsaturated hydrocarbons,
and does not dissolve paraffin hydrocarbons, it is the best extractant
of BTX.
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