Patent ID: 6906142

Claim:
An impact resistant PMMA molding composition, comprising: a) a matrix copolymer of from 75 to 100% by weight of methyl methacrylate from 0 to 15% by weight of acrylate and from 0 to 15% by weight of other copolymerizable compounds, and b) another matrix copolymer of from 70 to 92% by weight of styrene from 8 to 30% by weight of acrylonitrile from 0 to 22% by weight of other comonomers, and c) an impact modifier mixture of c1) silicone elastomer particles having a PMMA shell and c2) an impact modifier based on acrylate rubber, where (i) the contents of c 1) are from 5 to 100% by weight and of c2) are from 0 to 95% by weight, based on the entirety of c1) and c2), (ii) the amount of c) in the composition ranges from 5 to 60% by weight, based on the entirety of components a) and b) and c), (iii) the content of a) ranges from 50 to 95% by weight, and the content of b) ranges from 0to 45% by weight, the contents of the components of the composition being 100% in total, and the molding composition having the following properties: a Vicat softening point to ISO 306 (B50) of at least 950° C., a notched impact strength NIS (Izod 180/1 eA, 1.8 MPa) to ISO 180 of at least 3.0 kJ/m 2 at −20° C. and of at least 2.5 kJ/m 2 at −40° C., and a modulus of elasticity to ISO 527-2 of at least 2000 MPa.