| 摘要 |
<p>Claimed is a copolyether amide having a melting point in the range of 180 DEG to 260 DEG C, incorporating at least 10 wt.% and not more than 30 wt.% of ethylene oxide groups, and composed of 30 to 60 wt.% of polyamide segments and 70 to 40 wt.% of segments derived from a (cyclo)aliphatic or aromatic dicarboxylic acid or a dimeric fatty acid and a polyoxyalkylene diamine derived from a polyoxyalkylene group having a molecular weight of 600 to 6000 and an atomic ratio of carbon to oxygen of 2,0 to 4,3. Also claimed is a non-porous, waterproof film having a water vapour permeability of at least 1000 g/m<2>day determined at 30 DEG C and 50% RH in accordance with ASTM E96-66 which is based on a the use of these films in rainwear, shoes, tents, chairs, as mattress covers and underslating, for medical purpose garments, and for the manufacture of dressings.</p> |
