Uv stable polyetherester copolymer composition and film...

Details Uv stable polyetherester copolymer composition and film... Uv stable polyetherester copolymer composition and film...

C - Chemistry, Metallurgy

08

L

C08L 67/02 (2006.01) C08J 5/18 (2006.01) C08K 3/04 (2006.01) C08K 5/34 (2006.01) C08K 13/02 (2006.01) C08L 71/02 (2006.01)

Patent

CA 2333462

The invention relates to a polyetherester copolymer composition having a strongly improved UV stability, which is eminently suitable for use in film. The polyestherester copolymer composition according to the invention contains 0.1-10 wt.% activated carbon and 0.05-3 wt% of a hindered amine light stabilizer (HALS). Preferably, the contents are 0.5-3 and 0.2-1 wt.%, respectively. At a film thickness of 100 µm an increase in the life on the order of a factor 2, relative to the effect of the sum of the individual components, appears to be possible. Preferably, the molecular weight of the HALS is higher than 1500.

L'invention concerne une composition de copolymère de polyétherester possédant une stabilité aux UV sensiblement accrue, pouvant être particulièrement utilisée dans un film. Ladite composition de polyétherester de l'invention contient 0,1 à 10 % en poids de charbon activé et 0,05 à 3 % en poids d'un stabilisant UV à amine empêchée (HALS). De préférence, les teneurs sont respectivement de 0,5 à 3 et 0,2 à 1 % en poids. Avec une épaisseur de film de 100 mu m, une augmentation de la durée de vie de l'ordre du facteur 2, par rapport à l'effet de la somme des composants séparés, semble possible. Le poids moléculaire de HALS est supérieur à 1 500.

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