Epoxy resin Intumescent

Industrial furnace tests, according to UL-1709 standard, have been carried out in a 1.5 m3 furnace (Figure 6.20) for further comparison with the heat radiator test. Different intumescent formulations have been examined The first type comprised three basic intumescent (ingredients include APP, PER, and melamine) epoxy resins (IF1, IF2, and IF3) whose performance is compared to a reference commercial intumescent epoxy resin (IF4). 

The formation of borophosphate partially explains the good performance when APP and boric acid are mixed together in the epoxy resin. Indeed, in that case good mechanical resistance of the intumescent char is observed as borophosphate is a hard material, which also shows a good thermal stability. As a conclusion, the boron containing compounds provide the good structural properties of the char, whereas the phosphorus ensures the adhesion of the char to the steel. 

Uses Flame retardant for epoxy resins, adhesives, coatings, and textiles Features Intumescent nonhalogen... 

Notes White free-flowing powders, easily dispersed in polymers mainly used in intumescent paints also in sealants, PU foams, epoxy resins, non-halogenated FR PP ... 

Polyolefins Polyesters Epoxy resins and Rubber Adjuvant flame retardant for intumescent coatings and paints Higher temperature processing due to high thermal stability Additive in lubricants... 

A Epoxy Resin 4% Chlorophosphate in the (S) catalyst Intumescent Failed Failed... 

APP and APP-based systems are very effident halogen-free flame retardants mainly used in polyolefins (PE, PP), epoxies, polyurethanes, unsaturated polyesters, phenolic resins, and others. APP is a nontoxic, environment friendly material and it does not generate additional quantities of smoke due to intumescence. Compared to other halogen-free systems, APP requires lower loadings. In thermoplastic formulations, APP exhibits good processability, retention of good mechanical properties. 

Gilman, J.W. Kashiwagi, T. Giannehs, E.P. Manias, E. Lomakin, S. Lichtenham, J.D. Jones, P. Flammabihty studies of pol3mer layered silicate nanocomposites polyolefin, epoxy, and vinylester resins. In M. Le Bras, G. Camino, S. Bourbigot, and R. Delobel, Eds., Fire Retardancy of Polymers The Use of Intumescence. Royal Society of Chemistry, London, 1998, pp. 203-221. 

---