Diamines
are compounds which contain two amino groups. Both aliphatic (linear or branched
from short C-2 chain to fatty length ) and aromatic diamines are used as a
monomer to form copolymers like nylons, polyesters and polyurethanes for
characteristic properties. They can form a protein-like structure at both ends
of each monomer. The chain length characteristics with recurring amide groups
provide a variety physical properties and are further processed into various
applications including plastics, oil-modified and moisture-area types of
urethane coatings, polyamides for printing inks, dimer acids, textiles,
lubricant additive as scale and corrosion inhibitor, epoxy curing agent,
isocyanates, water treatment chemicals, biocides, and pharmaceutical
intermediates.
Cycloaliphatic diamines are used in urethane and epoxy coatings
for light-stable, weather-resistant properties. It is
used in water proofing and paving concreting. It is used in
manufacturing diisocyanates and polyamides. Common cycloaliphatic diamines
include isophorone diamine, 1,2-diaminocyclohexane, 1,4-bis(aminocyclohexyl)methane,
1,3-bis(aminomethyl)cyclohexane, bis(aminomethyl)norbornane. They are versatile
intermediate to produce leather, rubber products, plastics,
pesticides, dyes, and photo sensitive polymers. It is used in manufacturing diisocyanates and polyamides.
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