Thermally reversible isocyanate polymers

Details Thermally reversible isocyanate polymers Thermally reversible isocyanate polymers

C - Chemistry, Metallurgy

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G

C08G 18/06 (2006.01) C08G 18/10 (2006.01) C08G 18/28 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08G 18/42 (2006.01) C08G 18/44 (2006.01) C08G 18/64 (2006.01) C08G 18/66 (2006.01) C08G 18/80 (2006.01) C08J 5/12 (2006.01)

Patent

CA 2075285

Thermally-reversible polymer compositions are obtained by reacting compounds with isocyanate and labile-hydrogen func- tionality. High-performance characteristics are incorporated into the polymer by using polyimide, aromatic polycarbonate, aro- matic polyester, polyphenylene sulfide, and poly(parabanic acid) oligomers. Low-temperature flexibility and toughness are im- parted to the polymers by using prepolymers such as polycaprolactone diols, polytetramethylene ether glycols and polyaliphatic carbonate diols. Ionic bonding and liquid-crystal functionality may also be incorporated into the compositions. The compositions are useful as hot-melt adhesives, coatings, and moldings and in injection reaction molding applications and composite and lami- nate fabrication.

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