C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 67/00 (2006.01) C08L 67/02 (2006.01) C08L 67/04 (2006.01)
Patent
CA 2549990
This invention relates to a blend of biodegradable polymers comprising: (A) about 70% to about 80% by weight of at least one flexible biodegradable polymer (A) having a glass transition less than about 0~C, (B) about 30% to about 20% by weight of at least one rigid biodegradable polymer (B) having a glass transition greater than about 10~C; said percentages being based on the total weight of the polymer blend; wherein said polymer blend has a notched Izod impact strength according to ASTM D256 of at least 7.5 fl-lbs/in.
L'invention concerne un mélange de polymères biodégradables comprenant (A) entre environ 70 % et environ 80 % en poids d'au moins un polymère biodégradable souple (A) présentant une température de transition vitreuse inférieure à environ 0 ·C, et (B) entre environ 30 % et environ 20 % en poids d'au moins un polymère biodégradable rigide (B) présentant une température de transition vitreuse supérieure à environ 10 ·C, ces pourcentages étant basés sur le poids total du mélange de polymères. Ledit mélange de polymères présente une résistance au choc Izod entaillé selon ASTM D256 d'au moins 7,5 pieds-livres/pouce.
Hale Wesley Raymond
Tanner Candace Michele
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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