The invention relates to a composition forming an insulating layer, which composition contains a binder, which is based on a compound having electron-deficient carbon multiple bonds and a carbanion-forming compound. By means of the composition according to the invention, the expansion rate of which is relatively high, coatings having the layer thickness required for the particular fire resistance time can be applied easily and quickly, wherein the layer thickness can be reduced to a minimum and nevertheless a great insulating effect can be achieved. The composition according to the invention is suitable especially for fire protection, in particular as a coating of steel components, such as supports, beams and truss members, for increasing the fire resistance time.

Fire impregnation substance is produced by polymerization of non-toxic components in such a way that pentaerythritol (5% to 90% of the mass) and ammonium polyphosphate (5% to 90% of the mass) are added to the water (30% to 96% of the mass) with temperature from 5 C. to 98 C. and the solution is mixed until it is pure. The mutual ratio of the components of pentaerythritol and ammonium polyphosphate can range from 1:18 to 18:1 During the production of the cellulose product or fibrous wood products such as chipboards or particle boards the wood chips or sawmill shavings are dipped in the impregnation substance before connecting and pressing, or the impregnation substance is added to adhesive or binder, respectively, which coats the chips or shavings before pressing into desired product. The cores of microintumescence inside the material, mainly on surfaces of the original chips, shavings or fibers subsequently produce gradually activate layers preventing the permeation of the fire's effects.

An intumescent composition which comprises a polymer selected from a silane-terminated polyurethane or a silane-terminated polyether, a plasticizer that is compatible with the polymer and an intumescent ingredient. Processes of forming a cured intumescent substance, and methods of fire protecting a building are also provided.

An intumescent coating composition includes a binder resin, an acid-generating agent, and an expansion agent. The expansion agent can be meso-lactide, a polylactide or other polyester, a polysulfone, a polycarbonate, a 1,1-di-activated vinyl compound, or an addition polymer of a 1,1-di-activated vinyl compound, or a combination of any thereof.

This application relates to I-joists which are configured to resist fire damage. Specifically, the present application relates to reinforcing I-joists with reinforcing members configured to provide structural support and/or to provide a physical barrier to fire. This may help the I-joists to maintain structural integrity during a fire and so help improve safety during evacuation of a building and during fire-fighting operations.

A coating composition comprising: a) a first expandable graphite compound having a mean particle size in the range of from 300 microns to 1000 microns; b) a second expandable graphite compound having a mean particle size in the range of from 0.5 microns to 250 microns; c) a binder comprising: i) a thermoplastic compound and ii) a thermoset compound; d) a catalyst; and e) a blowing agent, is disclosed.

Intumescent flame-retardant formulations and their application to mass timber substrates.

The invention relates to a mixture containing as component A at least one organic phosphinic acid salt and as component B at least one alkali metal stannate (M.sub.2SnO.sub.3), alkali metal hydroxyl stannate (M.sub.2Sn(OH).sub.6), alkaline earth metal stannate (MSnO.sub.3) and/or alkaline earth metal hydroxy stannate (MSn(OH).sub.6). The invention relates also to the use of such a mixture.

Fire retardant paint compositions and coatings containing acrylic modified polysiloxane, polyphosphate salt, expandable graphite, and fire retardant additives are provided. The paint compositions find use in protecting a substrate against fire and exhibit excellent adhesion to substrates and long term weather resistance.

A mixture curable to provide an intumescent coating material. The mixture comprises a silicone polymer, a cross-linker, a diluent and an intumescent ingredient. The mixture comprises at least 50% by weight of the intumescent ingredient.