New fire‐protective intumescent coatings for wood

Polyurethane coatings are highly flammable, and because of their widespread applications on different substrates (wood, steel, and building materials), there is a need to increase their fire‐safety properties. Intumescent additives sharply suppress the flammability properties of polyurethane coatings. Two problems accompany intumescent additives: their high loading percentage and incompatibility with polyurethane coatings. In this research, we succeeded in increasing the compatibility by mixing intumescent additives with a butyl acrylate polymer and in lowering the flame‐retardant additive loading (up to 20%) by incorporating newly modified montmorillonite. The flammability properties of the new intumescent coatings were characterized with a cone calorimeter. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Newly Modified MMT and Its Application with Intumescent Additives as New Flame Retardant System for Polyurethane Polymer

Montmorillonite (MMT) clay was modified using the new modifier butyl acrylate resin. The new modified MMT have better thermal stability in comparison with butyl acrylate. The newly modified MMT mixed with polyurethane (PU) and formed a new nanocomposite PU formulation, and the structure has been proven by atomic force microscopy (AFM). New flame retardant systems containing the modified nanoclay were added to the polyuerethane polymer. The flammability properties of the new PU formulations were evaluated by cone calorimeter and ISO 1210 tests. The thermal stability of the formulations was studied by TGA and DSC. The new flame retardant systems gave the PU higher fire properties and good thermal stability.     

The Effect of New Flame Retardant Systems Containing Montmorillonite-Butyl Acrylate Nanoclay on the Flammability Properties of Polyuerethane Polymer

The montmorillonite (MMT) was modified by butyl acrylate polymer. The newly modified MMT was characterized by TGA and DSC techniques. The modified MMT constitute melamine phosphate and different carbonizing agents and new flame retardant systems for poly urethane (PU) polymer. The flammability properties of the different PU formulations were characterized by cone calorimeter and ISO 1210 tests.The new flame retardant system gave the poly urethane polymer higher fire class, V0 (PU3 & 23). The thermal stability of the PU formulations was also improved.