MULTI-LAYER SHEETS, METHODS OF THEIR MANUFACTURING AND PRODUCTS RECEIVED FROM THESE SHEETS Russian patent published in 2018 - IPC B32B15/82 B32B27/08 B32B27/12 B32B27/28 B32B27/30 B32B27/36 B32B7/12 

FIELD: materials.

SUBSTANCE: invention relates to multilayer sheets, methods for their preparation and articles obtained from these sheets, and, in particular, to multilayer sheets characterized by flame retardant properties, to the methods of their manufacture and to the products obtained from them. Multilayer sheet comprises a base layer comprising polycarbonate siloxane-arylate, and a top layer located on the side of the base layer, the top layer comprising poly (ethylene terephthalate), poly (vinyl fluoride), poly (vinylidene fluoride) or a combination comprising at least one of the above, wherein the multilayer sheet has at least the following properties: the flame propagation time is less than 15 seconds, a burn-out length of less than 6 inches and a fading time of the fallen burning material of less than 5 seconds, where each parameter is measured in accordance with the method set forth in JAR F25.5, and in accordance with JAR 25.853 (a) for a sample thickness of 3 mm; the integrated heat dissipation rate for 2 minutes is less than or equal to 65 kilowatt-minutes per square meter (kW-min / m²) and a peak heat dissipation of less than 65 kilowatts per square meter (kW / m²), measured in accordance with the method described in Section IV OSU Heat Release, JAR 25.853, as amended 25-116; the maximum averaged intensity of thermal radiation is less than or equal to 90 kW / m² at a radiation level of 50 kW / m² according to the test conditions of ISO 5660-1 or smoke density for a specimen 1.0 mm thick less than or equal to 200 particles after four minutes of burning according to ASTM E662-06.

EFFECT: fireproof sheets.

40 cl, 5 dwg, 4 tbl, 11 ex