Composition for plates coulees of arrays of interpenetrating methacrylate and poly (methyl styrene-b-acrylate), plates coulees obtained from this composition and their method of manufacturing

摘要

The composition in order to cast ingots of poly (methyl methacrylate) is interpenetrated with polyurethane elastomer, in which the ratio of the components of the base of the polyurethane network - - - that is to say the sum of the (or) compound (s), organic (s) to the isocyanate functions (or) and the polyol (s) - to the sum of these components and of methyl methacrylate, is between 3% and 8%, comprises a stabilizing system constituted by: & br / (i) 0,1 to 2% by weight of at least one antioxidant redox; & br / & (ii) 0,01 to 0,5% by weight of at least one primary antioxidant photostable; & br / (containing) up to 0,5% by weight of a uv absorber, & br /, these percentages being attached to the methyl methacrylate. & br / application to the preparation of cast ingots to ageing resistance improved.