Thermosetting polyurethane-urea elastic yarn and process thereof

Details Thermosetting polyurethane-urea elastic yarn and process thereof Thermosetting polyurethane-urea elastic yarn and process thereof

1995-10-18

1997-04-01

Hamilton, III, Thomas

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528906, 264205, D01F 670, D01F 672, C08G 1810, C08G 1832

Patent

active

056166761

ABSTRACT:
A thermosetting polyurethane-urea elastic yarn having a thermosetting ratio of 45-65%, which is obtained by reacting a polyglycol which has a number average molecular weight of 600-6,000 and which has hydroxy at both terminals, with a molar excess of a diisocyanate compound to give an isocyanate-terminated polymeric intermediate, reacting the isocyanate-terminated polymeric intermediate with a diamine compound to give a segmented polyurethane-urea elastomer, and subjecting the obtained elastomer to a spinning step. The thermosetting polyurethane-urea elastic yarn of the present invention has superior mechanical properties and high thermosetting ratios. When applied to knit fabric, particularly to thin knit fabric for panty hose, superior appearance of the knit fabric can be achieved.

REFERENCES:
patent: 3557044 (1971-01-01), Bleasdale et al.
patent: 4973647 (1990-11-01), Bretches et al.
patent: 5362432 (1994-11-01), Houser et al.

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