Lignin-containing polyurethane and process for producing the...

Details Lignin-containing polyurethane and process for producing the... Lignin-containing polyurethane and process for producing the...

C - Chemistry, Metallurgy

08

G

C08G 18/64 (2006.01)

Patent

CA 2450852

A polyurethane which comprises a polyurethane and a ligninsulfonic acid residue incorporated in the molecular chain of the polyurethane and which is inexpensive and has excellent material properties. The polyurethane is characterized by being obtained by condensation-polymerizing a polyisocyanate with a polyol solution containing ligninsulfonic acid or a partial neutralization salt thereof in a dissolved state, and by having a ligninsulfonic acid content of 1 to 40% based on the whole polyurethane.

L'invention concerne un polyuréthane comprenant un polyuréthane et un résidu acide lignosulfonique intégré dans une chaîne moléculaire du polyuréthane et qui n'est pas onéreux et présente d'excellentes propriétés en termes de matériau. Ledit polyuréthane se caractérise en ce qu'il s'obtient par polymérisation par condensation d'un polyisocyanate avec une solution polyol contenant de l'acide lignosulfonique ou un de ses sels de neutralisation partielle, à l'état dissous et avec une teneur en acide lignosulfonique de l'ordre de 1 à 40% sur la base de l'ensemble du polyuréthane.

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