C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/199 (2006.01) C08G 63/181 (2006.01)
Patent
CA 2292715
This invention relates to PET copolymer compositions that have both 1,4- cyclohexanedimethal (CHDM) and isophthalic acid moieties copolymerized. These compositions have better oxygen and carbon dioxide barrier properties than either PET homopolymer or CHDM-modified PET copolymers. These copolymer compositions are useful for packaging applications (such as carbonated soft drink bottles) requiring barrier properties to oxygen and carbon dioxide at least as good or better than PET homopolymer.
L'invention porte sur une composition de copolymère PET comportant des fragments de 1,4-cyclohexanediméthal (CHDM) et d'acide isophtalique copolymérisés. Ces compositions présentent de meilleures propriétés de barrières vis-à-vis de l'oxygène et du CO¿2? que les PET d'homopolymères ou de copolymères de CHDM modifiés. Les susdites compositions dont adaptées à des applications d'emballage (bouteilles de boissons gazeuses sucrées) requérant des propriétés de barrières vis-à-vis de l'oxygène et du CO¿2? au moins aussi bonnes ou meilleures que celles des PET d'homopolymères.
Jones Allan Scott
Long Timothy Edward
Wells Sara Stanley
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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