Patent ID: 8293815

Claim:
An element, comprising: a low viscosity thermoplastic plastic; from 0.01 to 2 wt. % of IR-reflective particles comprising at least one lamellar-shaped carrier pigment coated with a metal oxide; and an impact modified polymethyl methacrylate comprising a polymethyl methacrylate matrix and an agent to modify impact resistance; wherein a hail impact test rating of the element is at least 4J according to SIA V280, and the element is obtained by a process comprising: mixing the IR-reflective particles with a melt of the low-viscosity thermoplastic plastic at a temperature of at least 280° C. in a pressure-free, non-shearing zone of a twin-screw extruder to form a pre-mixture comprising from 5 to 40 wt. % of the IR-reflective particles; extruding the pre-mixture; converting the pre-mixture to a granulate or a melt; mixing the granulate or melt of the premixture with a granulate or a melt of the impact modified polymethyl methacrylate to form a mixture; extruding or co-extruding the mixture with another melt of a thermoplastic plastic into an extrudate having a desired shape; and cooling said extrudate to obtain the element wherein a melt viscosity of the low viscosity thermoplastic plastic is 20 to 80% lower than a melt viscosity of the matrix polymethyl methacrylate at a temperature at which the mixture is extruded or co-extruded.