公开(公告)号：FR1457975A

公开(公告)日：1966-11-04

申请号：FR41869

申请日：1965-12-10

Applicant: BAYER AG

Inventor： RELLENSMANN W ,  WIEDEN H ,  FALKAI B VON ,  REICHLE A

IPC: C08G18/08 ,  C08G18/83 ,  C08J3/21 ,  D01F6/72 ,  D06P1/92

Abstract: 1,080,610. Polyurethane filaments. FARBENFABRIKEN BAYER A.G. Dec. 8, 1965 [Dec. 10, 1964], No. 52119/65. Heading B5B. A process for the production of a fast dyed, elastic filament made from a high molecular weight, segmented polyurethane comprises adding an acid or basic dyestuff to a solution of a segmented polyurethane containing acid or basic groups, especially tertiary amino and/or disulphonic acid or disulphimide groups, in an organic solvent, mixing the solution with the dyestuff and subsequently spinning said solution to form the fast dyed filament. The dyestuff may be added to the solution in a proportion of 0À1 to 10% by weight, especially 0À3 to 6%, based on the fibre forming polymer. Specified organic solvents include dimethyl formamide, dimethyl acetamide and dimethyl sulphoxide. Examples are given in which the spinning solution is spun by a dry spinning method to form the dyed filaments.