Acrylic sheet having uniform distribution of coloring and...

C - Chemistry – Metallurgy – 08 – L

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Details

C08L 33/12 (2006.01) C04B 26/06 (2006.01) C08F 2/42 (2006.01) C08F 2/44 (2006.01) C08F 20/14 (2006.01) C08J 5/18 (2006.01) C08K 3/22 (2006.01) C08L 51/08 (2006.01)

Patent

CA 2265496

The present invention is drawn to a composition and thermoformable sheets and articles made therefrom. In the present invention, ranges of chain-transfer agents, thixotropic agents, and mineral filler content are balanced to minimize migration or maldistribution of coloring matter and mineral filler during curing of methyl methacrylate in a syrup and also during subsequent heating and deformation in thermoforming, to achieve constancy of impact resistance and improve stability of patterns even in deformed portions of formed sheets.

La présente invention concerne une composition ainsi que des feuilles et articles thermoformables fabriqués à partir de cette composition. Dans le procédé selon la présente invention, on équilibre les gammes d'agents de migration de chaîne, d'agents thixotropiques et de charge minérale pour réduire la migration ou la mauvaise répartition de matière colorante et de charge minérale pendant le traitement du méthacrylate de méthyle dans un sirop et également pendant le chauffage et la déformation postérieurs lors du thermoformage, pour obtenir une régularité de la résistance aux chocs et améliorer la stabilité des motifs même dans les parties déformées des feuilles formées.

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