| abstract |
The invention relates to a method for protecting a thermoplastic polymer, whereby the following layers are superimposed by coextrusion, hot-pressing or multi-injection, in the following order: a protective layer (I) comprising a PMMA; an intermediate ductile layer (II) comprising a sequenced copolymer of formula BAn consisting of a polymer sequence B comprising at least 60 wt. % of at least one (meth)acrylic monomer having a Tg lower than -5°C, and n polymer sequences A which are connected to the polymer sequence B by covalent bonds, n representing an integer between 1 and 10, and comprise at least 60 wt. % of at least one (meth)acrylic monomer having a Tg higher than 0°C, such that sequence B and/or sequences A comprise between 0.2 and 20 wt. % of at least one compound selected from acrylic acid, methacrylic, styrene, alphamethyl styrene, maleic anhydride, acrylonitrile, glycidyl acrylate, and glycidyl methacrylate; and a layer of at least one thermoplastic polymer (III). |