Methacrylic composition for obtaining a coating having a rough texture and a matt appearance

Abstract

The invention relates to a methacrylic composition comprising (100-x-y) parts of at least one methacrylic polymer that is a homopolymer or copolymer of MMA, dispersed in which are: x parts of particles of a thermoplastic polymer A comprising MMA as the main monomer that is either crosslinked or that has a weight-average molecular weight Mw>300 000 g/mol, advantageously >400 000 g/mol (relative to a PMMA standard), with a weight-average diameter (ASTM D1921)>100 μm, advantageously >250 μm and <500 μm, advantageously <400 μm; y parts of particles of a crosslinked thermoplastic polymer B comprising MMA as the main monomer, with a weight-average diameter (ASTM D1921) ranging from 15 to 70 μm; such that x varies from 2 to 20 and y varies from 10 to 25. Preferably, x+y<33. The invention also relates to a multilayer structure comprising: a layer (I) comprising the methacrylic composition according to the invention; and a layer (II) comprising at least one thermoplastic polymer, and also an optional interlayer placed between layers (I) and (II).

Dependencies are inferred from the claim text.