FIREPROOF ADDITIVE TO POLYURETHANES, FIREPROOF POLYURETHANE, METHOD OF PRODUCTION OF FIREPROOF ADDITIVE

摘要

Fireproof additive slows or stops the burning of the polyurethane. The additive uses a mixture of the saccharose and copolymer of pentaerythritol, ammonium polyphosphate and melamine in aqueous solution. In preferable arrangement the additive can contain additional melamine which takes no part in polymerization and instead provides mainly a source of nitrogen to be released during the contact with flames. Saccharose in connection with copolymer has significant function in the creation of the surface structure which forms the mechanically resistant enough carrier for the intumescent processes. The additive is created from non-toxic components in such a way that into the water (30% - 90% mass share) with temperature between 15 °C and 25 °C a pentaerythritol (5% to 90% mass share) is added; during continuous mixing the solution is gradually heated to the temperature between 52 °C and 68 °C. Subsequently an ammonium polyphosphate (5% to 90% mass share) is added to the solution during intensive mixing and the solution is heated to the temperature above 92 °C. After surpassing this temperature melamine (5% to 90% mass share) is added to the solution and the solution is heated to the temperature between 98 °C and 100 °C. Subsequently a saccharose is added, as well as additional melamine.