Pmma/pvdf foil with particularly high weathering resistance...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 5/18 (2006.01) B32B 27/08 (2006.01) C09D 127/16 (2006.01) C09D 133/10 (2006.01)

Patent

CA 2691570

The invention describes a transparent foil composed of plastic with improved weathering resistance and increased intrinsic stability where the foil encompasses a) poly(meth)acrylate and polyvinylidene fluoride in a ratio of from 1: 0.01 to 1: 1(w/w); and b) a mixture composed of UV stabilizers and of UV absorbers. PMMA matrix plastics with high molecular weights and with a certain selected coacrylate proportion are preferably used in order to achieve excellent weathering resistance, and also improved intrinsic stability of the surface- protection foils.

L'invention concerne une feuille transparente en plastique qui constitue une protection élevée contre les intempéries et possède une résistance propre élevée. La feuille selon l'invention comprend a) du poly(méth)acrylate et du fluorure de polyvinylidène en un rapport de 1:0,01 à 1:1 (p/p) ; et b) un mélange de stabilisateurs UV et d'absorbeurs UV. Afin d'obtenir des feuilles de protection de surface qui présentent une excellente stabilité aux intempéries et une résistance propre élevée, des plastiques à matrice de PMMA de poids moléculaires élevés et avec une proportion sélectionnée donnée de coacrylate sont utilisés.

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