Linear segmented polyurethaneurea and process for production...

Details Linear segmented polyurethaneurea and process for production... Linear segmented polyurethaneurea and process for production...

C - Chemistry, Metallurgy

08

G

C08G 18/65 (2006.01) C08G 18/08 (2006.01) C08G 18/10 (2006.01)

Patent

CA 2089069

- 32 - ABSTRACT A linear segmented polyurethaneurea having a degree of branching (Nb) of 3 or less and obtained by chain- extending a prepolymer with an organic diamine in an organic solvent comprising dimethylformamide or dimethylacetamide, wherein the prepolymer has an isocyanate group at the both ends thereof and comprises a stoichiometrically excessive amount of a diisocyanate component selected from 4,4'-diphenylmethane diisocyanate, 2,4-toluene diisocyanate and 1,4-phenylene diisocyanate and a diol component having a number average molecular weight of 500 to 6000.

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