Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-07-24
1976-11-30
Cockeram, H.S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 75NT, 260 775AM, 260 775AT, 260 775SP, C08G 1832, C08G 1876
Patent
active
039948811
ABSTRACT:
Segmented elastomeric polyester polyurethaneurea spandex filaments having improved resistance to degradation by ultraviolet radiation and chlorine-containing bleaches in which the hard segments contain ureylene groups joined to functionally non-aromatic radicals, at least 25 mole percent of which are ##SPC1##
Are provided as well as a process for preparing them from a polymer formed from a polyester glycol, a functionally non-aromatic diisocyanate and a functionally non-aromatic diamine. A sufficient amount of the diisocyanate and/or diamine having the structure ##SPC2##
Wherein R is --NCO or --NH.sub.2 is reacted to provide at least 25 mole percent of the sum of the diisocyanate and diamine residues in the hard segment with the structure ##SPC3##
REFERENCES:
patent: 3365412 (1968-01-01), Thoma et al.
patent: 3401143 (1968-09-01), Finelli et al.
patent: 3415790 (1968-12-01), Davis et al.
patent: 3507834 (1970-04-01), Wittbecker
patent: 3555115 (1971-01-01), Bottomley et al.
patent: 3600358 (1971-08-01), Taub
patent: 3839284 (1974-10-01), Mohajer
patent: 3870683 (1975-03-01), Freure et al.
Altau Karl
Stiehl, Jr. Roy Thomas
Cockeram H.S.
E. I. Du Pont de Nemours and Company
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