Abstract: A cooling tower with a plurality of fill packs has a fire stop with openings disposed below the fill packs, a water distribution system for distributing water onto the fill packs, and a cold water basin disposed below the fire stop for collecting water which has past through said fill packs. The openings in the fire stop occupy at least 80% of the area over which the fire stop extends. The fire stop is made of an intumescent material with an expansion ratio sufficient to close said openings when said material intumesces.

Abstract: A battery housing has a body and a lid mateable with the body. The body and the lid, when mated, provide a chamber dimensioned to hold at least one battery; and a venting passageway from the chamber. At least a portion of at least one of the body and the lid comprises an intumescent flame retardant material with an expansion ratio sufficient to drive gas from the chamber through the venting passageway and to seal the chamber when the material intumesces in the event of thermal runaway of a battery housed in the chamber.

Abstract: A firestop element can be installed as a passthrough for a floor of a building. The element has a rigid annular body having a first section and a second section. At least a portion of the first section is fabricated of a polymer intumescent composition. This portion has an inner annular surface with a plurality of spaced lands and a void extending between each pair of lands. The second section is a sleeve having a smaller diameter than the first section.

Abstract: A cooling tower with a plurality of fill packs has a fire stop with openings disposed below the fill packs, a water distribution system for distributing water onto the fill packs, and a cold water basin disposed below the fire stop for collecting water which has past through said fill packs. The openings in the fire stop occupy at least 80% of the area over which the fire stop extends. The fire stop is made of an intumescent material with an expansion ratio sufficient to close said openings when said material intumesces.

Abstract: A composition for a firestop is provided. The composition comprises a thermoplastic; expandable graphite; alumina trihydrate; and a flame retardant compound or mixture comprising antimony and a halogen. There is also provided a flame retardant composite, which comprises expandable graphite; alumina trihydrate; antimony; and a halogen. The halogen may include bromine. The flame retardant compound may be brominated antimony. The flame retardant mixture may include an antimony oxide and a compound containing bromine. The flame retardant composite may comprise brominated antimony, or comprise antimony trioxide and a bromine-containing compound.

Abstract: A compound is provided having the means of intumescence at temperatures above 195° C. to 220° C. The compound is an intumescent powder defined by the molar ratios (2.20 to 3.70) SiO2/(0.20 to 0.35) Li2O: (0.65 to 0.80)(Na2O+K2O) where the coefficients of Li2O and of (Na2O+K2O) total 1.00 and thermoplastic material having a plastic state at less than 195° C. If the thermoplastic contains a halogen, as does Polyvinyl Chloride (PVC) the halogen acts as a flame retardant in the event of combustion and prevents complete burning of the plastic. If there is as filler mixed with the compound which is endothermic this assists with the fire retardant effect of the compound.

Abstract: An intumescent powder where the molar ratio of SiO2 to Li2O+Na2O+K2O is between 2.20 to 3.70 to 1.00 and the molar ratio of Li2O to Li2O+Na2O+K2O is 0.20 to 0.35 has an intumescent point of 195° C. or higher and thus will not prematurely intumesce if mixed with another material at temperatures below 195° C. The powder as used is usually dried to 8-12% by weight to moisture for most purposes is ground to 50 to −500 microns. Preferred methods of manufacture comprise taking a source of lithium hydroxide or lithium silicate and a source of sodium silicate to create a powder with ratios as outlined above.