Polymer mixture consisting of an impact-resistance modified poly (meth) acrylate and a fluoropolymer
View Patent ↗The invention relates to a molded body consisting of plastic with a material thickness of at least 150 $g(m)m at any point. Said body contains a polymer mixture of an impact-resistance modified poly(meth)acrylate plastic, a polymethyl methacrylate matrix, elastomer particles contained in said matrix and a fluoropolymer. According to the invention, the fraction of the fluoropolymer in the mixture is between 30 and 95 wt. % and the polymer mixture of the impact-resistance modified poly(meth)acrylate plastic and the fluoropolymer is present in an outer layer with a continuous material thickness of at least 10 $g(m)m. The invention is characterized in that the impact-resistance modified poly(meth)acrylate plastic consists of between 20 and 70 wt. % poly(meth)acrylate matrix and between 30 and 80 wt. % elastomer particles.
1. A molding having a material thickness of at least 150 μm, and obtained from a composition comprising a polymer mixture comprising (1) an impact-modified poly(meth)acrylate polymer which is a poly(meth)acrylate matrix with elastomer particles distributed therein, and (2) a fluoropolymer, the proportion of the fluoropolymer in the polymer mixture being from 30 to 95% by weight, wherein
the impact-modified poly(meth)acrylate polymer consists of from 20 to 70% by weight of the poly(meth)acrylate matrix and from 80 to 30% by weight of the elastomer particles.
2. The molding as claimed in claim 1 , wherein the elastomer particles have a core of a soft elastomer phase and a hard phase bonded thereto.
3. The molding as claimed in claim 1 , wherein the mean particle diameter of the elastomer particles is from 10 to 1000 nm.
4. The molding as claimed in claim 1 , wherein said composition consists entirely of said polymer mixture.
5. The molding as claimed in claim 4 , wherein the material thickness is from 150 to 10 000 μm.
6. The molding as claimed in claim 5 , wherein the elongation at break after storage at 60° C. for 10 days is at least 150%.
7. The molding as claimed in claim 5 , wherein the elongation at break after storage at 60° C. for 10 days is still at least 60% of the value without 10-day thermal stress.
8. The molding as claimed in claim 5 , which is in the form of a film, and wherein the film is present within a membrane structure, said membrane structure comprising at least two curved films welded to one another at the edges and enclosing a cavity.
9. A process for producing the molding as claimed in claim 5 , comprising thermoplastic processing, extrusion or injection molding, or solvent casting said composition.
10. A method comprising forming the molding as claimed in claim 5 as a roofing element, façade element, or a window in a folding roof for a vehicle with foldable soft top.
11. The molding as claimed in claim 1 , wherein from 0.01 to 10% by weight of a light stabilizer is present therein.
12. The molding as claimed in claim 1 , wherein the proportion of the fluoropolymer in the polymer mixture is from 50 to 70% by weight.
13. The molding as claimed in claim 1 , wherein the elastomer particles are present in an amount of 70 to 50% by weight of the impact-modified poly(meth)acrylate polymer.