Bonding compositions and shaped articles utilizing the...

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C - Chemistry, Metallurgy

08

G

154/140, 402/183

C08G 69/44 (2006.01) B32B 27/36 (2006.01) C08G 73/16 (2006.01) C08J 5/12 (2006.01) C09J 177/12 (2006.01) C09J 179/00 (2006.01)

Patent

CA 1218192

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 0.45 dl/g, said poly(esteramide) containing repeating units from at least 80 mol percent of a dicarboxylic acid selected from pimelic, azelaic, sebacic acid or combinations thereof and optionally up to 20 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 5 mol percent to 20 mol percent of 1,2-ethanediamine; and repeating units from 95 to 80 mol percent of a glycol selected from ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol 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.

451430

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