Acrylic sheet having uniform distribution of coloring and...

Details Acrylic sheet having uniform distribution of coloring and... Acrylic sheet having uniform distribution of coloring and...

C - Chemistry, Metallurgy

08

L

C08L 33/12 (2006.01) C04B 26/06 (2006.01) C08F 265/06 (2006.01) C08J 5/18 (2006.01) C08K 3/22 (2006.01) C08L 51/00 (2006.01)

Patent

CA 2188465

Ranges of chain-transfer agents, thixotropic agents, and alumina trihydrate content are balanced to minimize migration or maldistribution of coloring matter and alumina trihydrate during curing of methyl methacrylate in a syrup including polymethylmethacrylate 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. Such sheets can be bent to a significantly greater degree than those of the prior art.

On équilibre des gammes d'agents de migration de chaîne, d'agents thixotropes et de particules d'hydroxyde d'aluminium en vue de limiter la migration ou la distribution incorrecte des matières colorantes et de l'hydroxyde d'aluminium au cours de la polymérisation du méthacrylate de méthyle dans un sirop contenant du polyméthacrylate de méthyle, ainsi qu'au cours du chauffage et de la déformation ultérieures par thermoformage, de façon à obtenir une résistance aux chocs constante et à améliorer la stabilité des structures, même dans les parties déformées de feuilles profilées. Ces feuilles peuvent être pliées suivant un angle sensiblement plus grand que les feuilles produites selon la technique antérieure (Figure 1A).

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