The hottest new method to improve the flame retard
2022-09-29- Detail
A new method to improve the flame retardant performance of marine composites
the flame retardant performance of composites has always been a major obstacle to deter them from becoming the main structure of shipbuilding. For this reason, Italian researchers have achieved the goal of improving the flame retardancy of composites by adding zinc based compounds to epoxy resins. In the United States, up to now, federal regulations also prohibit the use of composite materials in the main structure of ships, because the flame retardant performance of composite materials can not meet the requirements
recently, at a meeting held by the Italian Classification Society (i.e. Rina Royal Society of shipbuilders), the Institute of composite materials (IMCB) and the Italian national Biomedical Research Council (CNR) emphasized the importance of improving the flame retardant properties of composite materials by adding zinc based compounds to epoxy resins
experts at the meeting pointed out that unmodified epoxy resin burns at a temperature of 400 ℃, and then it is mass produced, which is harmful to smoke over time. Most of the smoke is caused by the flammable volatiles contained in the resin as can be seen from the above figure
it is understood that zinc and tin compounds can effectively inhibit the emission of harmful smoke, and they achieve this by slowing down the combustion process. The tests of Italian experimenters showed that zinc borate, zinc stannate such as data and zinc hydrogen stannate compounds can be added as additives to the low viscosity toughened epoxy resin used in resin transfer molding (RTM) and vacuum pouring process, which can effectively improve the flame retardant performance of the resin
British Bureau of shipping submitted a theoretical model of the expected behavior of FRP Yacht composites under the specified thermal load, and finally adhered to the idea of "port, industry and city" in the actual fire test, which successfully verified this view. This will greatly help designers to take timely and effective protective measures against harmful gas emissions during and after resin ignition
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