| abstract |
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 70 to 90 mol percent of a dicarboxylic acid selected from adipic, pimelic, suberic, azelaic, sebacic acid or combinations thereof and 10 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, 1,4-cyclohexanebismethylamine or combinations thereof; and repeating units from 90 to 70 mol percent of a glycol selected from ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol or combinations thereof. The repeating units from the second linear aliphatic dicarboxylic acid and repeating units from the diamine are present in equal molar amounts. 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. |