| 摘要 |
The invention relates poly(meth)acrylate-based compositions which can be formed into a film by thermal means, have been plasticised by addition of plasticisers and contain a polymer obtained from a dispersion and a bead polymer. The compositions M are mixtures of the components A) a finely divided homopolymer or copolymer FP obtained by spray-drying polymer dispersions and built up from a-1) 50-100% by weight of methyl methacrylate and a-2) 0-50% by weight of at least one monomer, other than methyl methacrylate, of the formula I <IMAGE> in which R1 is hydrogen or methyl and R2 is an optionally branched alkyl radical having 1 to 10 carbon atoms, and a-3) 0-5% by weight of an adhesion-promoting monomer HH, B) a bead polymer PP obtained by suspension polymerisation and built up from b-1) 10-20% by weight of methyl methacrylate, b-2) 0-80% by weight of at least one monomer of the formula I other than methyl methacrylate, and b-3) 0-5% by weight of an adhesion-promoting monomer HM, C) a plasticiser W in an amount of from 5 to 200 parts by weight per 100 parts by weight of the polymer mixture of A) + B), with the proviso that alpha ) at least one of the two components A) and B) is a copolymer as defined in a-2) or b-2) containing at least 5% of at least one monomer of the formula I, and that beta ) the ratio by weight between components A) and component B) is from 95:5 to 30:70. |
