| 摘要 |
The invention relates to a methacrylic composition comprising (100-x-y) parts of at least one methacrylic polymer comprising a MMA homo- or copolymer containing dispersed therein: x parts of particles of a thermoplastic polymer A containing MMA as a majority monomer which is crosslinked or has a weight-average mass Mw>300,000 g/mol, (in relation to a PMMA standard), with a weight-average diameter (ASTM D1921)>100 mum, and <500 mum; and y parts of particles of a crosslinked thermoplastic polymer comprising MMA as a majority monomer, with a weight-average diameter (ASTM D1921) ranging from 15 to 70 mum; such that x varies between 2 to 20 and y varies between 10 to 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).
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