| 摘要 |
<p>Hot-melt adhesives for articles which come into contact with organic fuels for internal engines comprising binary copolyamides having: A. 50-90 percent by weight of lactams or omega -aminocarboxylic acids having at least 10 methylene groups; and B. 50-10 percent by weight of equimolar quantities of aliphatic dicarboxylic acids and of aliphatic or cycloaliphatic diamines in which the total of the methyl, methylene and/or methylidyne groups present is at least 13. The extractable content in the copolyamide hot-melt adhesive is not more than 5 percent by weight as determined after 9 hours in boiling ethanol.</p> |
