Polyamide-imides are either thermosetting or thermoplastic, amorphous polymers that have exceptional properties.
Polyamide-imides display a combination of properties from both polyamides and polyimides. High mechanical strength, thermal and chemical resistant, also good wear and radiation resistance make Polyamide-imides very expensive.
Polyamideimides are either prepared from an aromatic diamine and aromatic acid chloride anhydride (acid chloride route) or from aromatic diisocyanate and anhydride (diisocyante route)
One of common ways to synthesize polyamide-imides are from reacting isocyanates and TMA (trimellic acid-anhydride) in N-methyl-2-pyrrolidone (NMP).
Polyamide-imide polymers can be processed into a wide variety of forms, from injection or compression molded parts and ingots, to coatings, films, fibers and adhesives.
Applications of polyamide-imides includes manufacturing parts for internal combustion and jet engines, electrical and electronic components, and extensively as wire coatings in making magnet wire.