| 摘要 |
<p>Bonding Compositions and Shaped Articles Utilizing the Bonding Compositions Bonding compositions for bonding polyesters or copolyesters to poly(vinyl alcohol) or copolymers thereof, the composition comprising a poly(esteramide) having an inherent viscosity of at least 0.8 dl/g, said poly(esteramide) containing repeating units from at least 70 mol percent of a dicarboxylic acid selected from pimelic, azelaic, sebacic acid or combinations thereof and optionally up to 30 mol percent of a second linear aliphatic dicarboxylic acid having at least four carbon atoms connected linearly between the two acid groups or an aromatic dicarboxylic acid; repeating units from 10 mol percent to 30 mol percent of a diamine selected from 1,6-hexanediamine, 1,4cyclohexanebismethylamine or combinations thereof; and repeating units from 90 to 70 mol percent of a glycol selected from ethylene glycol, 1,4-butanediol, 1,4cyclohexanedimethanol or combinations thereof. Also disclosed are shaped articles comprising a polyester polymer layer and a poly(vinyl alcohol) layer, the layers being bonded together with bonding compositions of this invention. It is preferred that the poly (vinyl alcohol) layer be an ethylene-vinyl alcohol copolymer having an ethylene content of 30 to 50 mol percent. The shaped article may be an oriented film or an oriented bottle.</p> |
