ROOFING SYSTEMS AND ROOFING BOARDS WITH NON-HALOGENATED FIRE RETARDANT

摘要

According to one embodiment, a halogen free roof system is described. The roof system includes a structural deck that is positioned above joists or other support members. Polyisocyanurate foam insulation is positioned atop the structural deck. The polyisocyanurate foam insulation has an isocyanate index greater than 200 and includes a polyisocyanurate core having a halogen free fire retardant. A water proof membrane is positioned atop the polyisocyanurate foam insulation. The polyisocyanurate core is able to form a sufficiently stable char when exposed to flame conditions such that the polyisocyanurate core is able to pass the ASTM E-84 test.

主权项

1. A polyisocyanurate foam insulation board comprising:
a polyisocyanurate core produced from:
an isocyanate;a polyol; andat least one isocyanate reactive mono-hydroxyl phosphorus containing non-halogenated fire retardant, the polyisocyanurate core forming a sufficiently stable char when exposed to flame conditions in accordance with an ASTM E-84 that enables the polyisocyanurate core to pass the ASTM E-84 test, wherein the polyisocyanurate core foam board comprises an initial R-value of at least 6.4, and wherein the polyisocyanurate core foam board exhibits an ASTM E1354-11b performance equivalent with or better than a polyisocyanurate foam insulation board having a halogenated fire retardant tris(2-chloroisopropyl)phosphate (TCPP); wherein the polyisocyanurate foam insulation board has an isocyanate index greater than 200.