Spray foams

The product contains 12.6% phosphoms and has an OH number in the 450 mg KOH/g range. Fyrol 6 is used to impart a permanent Class 11 E-84 flame spread rating to rigid foam for insulating walls and roofs. Particular advantages are low viscosity, stabiHty in polyol—catalyst mixtures, and outstanding humid aging resistance. Fyrol 6 is used in both spray foam, froth, pour-in-place, and slab stock. 

With amine initiators the so-called self-catalysed polyols are obtained, which are used in the formulation of rigid spray foam systems. The rigidity or stiffness of a foam is increased by aromatic initiators, such as Mannich bases derived from phenol, phenoHc resins, toluenediamine, or methylenedianiline... 

The penetration and eooling aetion of water is required with Class A fires, e.g. those involving paper, wood, textiles, refuse. Water is applied in the form of a jet or spray foam or multi-purpose powder extinguishers are alternatives. Extinguishment of a Class B fire ean be aehieved by the smothering aetion of dry ehemieal, earbon dioxide or foam. Most flammable liquids will float on water (refer to Table 6.1 under Speeifie gravity ), so that water as a jet is unsuitable a mist may, however, be effeetive. Water is also widely used to proteet equipment exposed to heat. Dry powders are effeetive on flammable liquid or eleetrieal fires. 

Fire Hazards - Flash Point (deg. F) 148 CC, 163 OC Flammable Limits in Air (%) No data Fire Extinguishing Agents Water spray, foam, carbon dioxide, or dry chemical Fire Extinguishing Agents Not To Be Used Not pertinent Special Hazards of Combustion Products Not pertinent Behavior in Fire Not pertinent Ignition Temperature (deg. F) 378 Electrical Hazard Not pertinent Burning Rate 3.8 mm/min. 

Shut off supply if not possible and no risk to surroundings, let the fire burn itself out in other cases extinguish with powder, water spray, foam, carbon dioxide. 

Mitigation factors— Systems or procedures, such as water sprays, foam systems, and shelteringand evacuation, which tend to reduce the magnitude of potential effects due to a release. 

The bulk of the ngid polyurethane and polyisocyanurate foam is used in insulation. See also Insulation (Thermal) More than half (60%) of the rigid foam consumed in 1994 was in the form of board or laminate die remainder was used in pour-in-place and spray foam applications. 

Direct application of dye liquor by spraying, foam application, or printing. 

Flash point, -30°C flammable limits, 1.3-50% ignition temperature, 90°C. Extinguish fire with foam, dry powder, carbon dioxide, or water spray. Foam and water may be ineffective.2... 

Flammable. Flash point, below -8°C. Extinguish fire with water spray, foam, dry powder, or carbon dioxide.1... 

Water spray, foam, mist, C02, or dry chemical. Ignition... 

The rise time for airless-sprayed urethane foam is about 30 s. It can be refoamed for additional thickness after this period. The foam can be walked on after 3 to 4 minutes and reaches its full properties in 24 h. The airless spray gun is held about 30 in. (76 cm) from the surface and moved steadily over it. Dispensing rates of 4 to 6 lb (1.8 to 3.6 kg) per minute are generally considered optimum for most spray applications. The surface on which the foam is sprayed must be free of loose scale or grease. The adhesion of urethane foam to steel is essentially equal to the tensile strength of the foam, provided the surface is clean. Aluminum surfaces, on the other hand, do not provide a good bond unless a primer coat, such as vinyl wash, is used prior to spray foaming. 

SAFETY PROFILE Poison by intraperitoneal and subcutaneous routes. Intensely irritating. Mutation data reported. Moderate fire hazard via heat, flame, and oxidizers. To fight fire, use water, spray, foam, dry che Tiical. When heated to decomposition it emits very toxic NOx and SOx. See also ESTERS and THIOCYANATES. 

Has produced liver and kidney injury in experimental animals. Mutation data reported. Sometimes thought to be nonflammable, however, it is a dangerous fire hazard when exposed to heat or flame. Reaction with solid caustic alkalies or their concentrated solutions produces chloracetylene gas, which ignites spontaneously in air. Reacts violently with N2O4, KOH, Na, NaOH. Moderate explosion hazard in the form of vapor when exposed to flame. Can react vigorously with oxidizing materials. To fight fire, use water spray, foam, CO2, dr) chemical. When heated to decomposition it emits toxic fumes of Cl . See also VINYLIDENE CHLORIDE and CHLORINATED HYDROCARBONS, ALIPHATIC. 

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