| 摘要 |
<p>A halogen-free flame retardant, low smoke generating thermoplastic composition comprising: (a) 50-70 weight percent of an ethylene acrylate copolymer which contains 30-60 weight percent ethylene, (b) 10-30 weight percent of a linear polyolefin of ethylene or propylene, (c) 5-25 weight percent of a polymer having a melting point not greater than about 180 DEG C selected from the group consisting of a multi-block copolyetherester elastomer or an ethylene vinyl ester copolymer of a monocarboxylic alkanoic acid containing 2-4 carbon atoms, said copolymer containing 10-30 weight percent vinyl ester or mixtures thereof, and (d) 100-175 parts per 100 parts total polymer of a hydrated inorganic metal salt flame retardant. These thermoplastic compositions are especially useful for wire and cable covering because, among other things, they do not emit toxic or corrosive gases when burned, they are dimensionally stable at elevated temperatures and they have a low smoke density when burned.</p> |
