| abstract |
Procedure for the production of a high molecular weight polyurethane solution, characterized in that it comprises reacting a mixture of propolymer terminated with groups reactive with isocyanates and containing active hydrogen, diisocyanate and difunctional reagent provided with two hydrogen atoms reactive with asanates, in a solvent for them, until the intrinsic viscosity of the resulting dissolved polyurethane is of the order of 0.9 to 1.4. (Machine-translation by Google Translate, not legally binding) |