C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
154/140, 402/183
C08G 69/44 (2006.01) B32B 27/04 (2006.01) B32B 27/36 (2006.01)
Patent
CA 1218193
Bonding Compositions and Shaped Articles Utilizing the Bonding Compositions 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 at least 70 mol percent of a dicarboxylic acid selected from pimelic, azelaic, sebacic acid or combi- nations 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, 1,4- 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. 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.
451953
Fagerburg David R.
Sand Irving D.
Shepherd Freddie A.
Wright Benny W.
Eastman Kodak Company
Gowling Lafleur Henderson Llp
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