Non-aqueous, base-degradable polyurethane

Details Non-aqueous, base-degradable polyurethane Non-aqueous, base-degradable polyurethane

C - Chemistry, Metallurgy

08

G

C08G 18/66 (2006.01) C05G 3/00 (2006.01) C08G 18/08 (2006.01) C08G 18/28 (2006.01) C08G 18/42 (2006.01)

Patent

CA 2203867

The present invention is directed to a non-aqueous base-degradable polyurethane. The polyurethane is prepared by reacting an organic polyisocyanate with a hydroxyl group containing hydrophilic composition. The hydrophilic composition must have specified amounts of ionic or acidic groups and specific amounts of polyester groups. In a preferred embodiment, the hydrophilic composition also contains polyoxyethylene groups.

La présente invention porte sur un polyuréthane dégradable dans une base non aqueuse. Ce polyuréthane est préparé par la réaction d'un polyisocyanate organique avec une composition hydrophile contenant un groupe hydroxyle. Cette composition doit contenir des quantités déterminées de groupes ioniques ou acides et des quantités déterminées de groupes polyester. L'une des variantes préférées de cette composition hydrophile contient également des groupes polyoxyéthylène.

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