VERFAHREN ZUR HERSTELLUNG VON GEGEBENENFALLS MEHRERE HOHLRAUME AUFWEISENDEN HOHLPROFILEN MIT KOMPLIZIERTEM QUERSCHNITT FUR DAS BAUWESEN, SOWIE NACH DEM VERFAHREN HERGESTELLTER GEGENSTAND

摘要

1444562 Extruded door or window frame section DYNAMIT NOBEL AG 21 Sept 1973 [22 Sept 1972] 44504/73 Heading B5A [Also in Division El] An extruded window or door frame section comprises rigid polyvinyl chloride, or acrylonitrile-butadiene-styrene polymer, which is coated with a simultaneously extruded layer of a homopolymer or co-polymer of methyl methacrylate on at least a surface exposed in use on the exterior of a building. The coating provides increased brilliance, light fastness, and weathering and scratch resistance, and may be coloured and incorporate ultra-violet absorbers. The coating may be coloured with dark pigment having high absorption of visible light, together with high infra-red reflectance, e.g. black pigments Sb 2 S 3 and Sb 2 S 3 -Sb 2 (SO 4 ) 3 . The methyl methacrylate is preferably of molecular weight of 120,000 to 180,000, and the coating thickness preferably 0À1 to 1 mm.