Description and references
A synthetic fiber, condensation product of
nonamethylenediamine and urea. Prepn of such polyurea polymers: GB 900787 (1962 to Toyo Koatsu
Ind.).
Properties
Fiber softens at 205-210°, mp
at about 237°. Sp gr 1.07. Loses
not more than 10% of its strength after 10 hrs of exposure to 40%
sulfuric acid or 40% caustic soda at room temp. Also loses strength
on prolonged exposure to light or to a temp of 150°. Hydrolyzes at
130° in the presence of steam.Status
This monograph has been retired and is no longer subject
to revision or update.