METHACRYLIC COMPOSITION FOR OBTAINING A COATING HAVING A ROUGH TEXTURE AND A MATT APPEARANCE

摘要

The invention relates to a methacrylic composition consisting of (100-x-y) parts of at least one methacrylic polymer comprising a MAM homo- or copolymer containing dispersed therein: x parts of particles of a thermoplastic polymer A containing MAM as a majority monomer which is cross-linked or has a weight-averaged mass Mw > 300000 g/mol, preferably > 400000 g/mol (in relation to a PMMA standard), with a weight-averaged diameter (ASTM D1921) > 100 µm, preferably > 250 µm and < 500 µm, preferably < 400 µm; - and y parts of particles of a cross-linked thermoplastic polymer comprising MAM as a majority monomer, with a weight-averaged diameter (ASTM D1921) ranging from 15 to 70 µm; such that x varies between 2 and 20 and y varies between 10 and 25. Preferably, x+y < 33. The invention also relates to a multilayer structure consisting of: a layer (I) comprising the inventive methacrylic composition, a layer (II) comprising at least one thermoplastic polymer and an optional intermediate layer between layers (I) and (II).