Bloom-free thermoplastic polyurethane compositions

Details Bloom-free thermoplastic polyurethane compositions Bloom-free thermoplastic polyurethane compositions

C - Chemistry, Metallurgy

08

G

C08G 18/42 (2006.01) C08G 18/28 (2006.01) C08G 18/66 (2006.01) C08G 18/71 (2006.01)

Patent

CA 2148881

Blooming in certain thermoplastic polyurethane products is substantially or completely eliminated by including a chain terminator. More specifically, at least one hydroxy functional polyester polyol having a molecular weight of at least 500 and a hydroxyl functionality of at least 2, a chain extender and an organic diisocyanate are combined with a chain terminator. The chain terminator which is preferably a monofunctional compound that is reactive with an isocyanate. These reactants are used in amounts such that the of NCO/H index of the formulation is at or near 100.

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