Ignition temperature minerals

The extrusion aid must easily coat the resin yet be readily removable from the extrudate. It should also not leave a residue which could alter the color of the product. The volatilization temperature of the lubricant should be lower than the sintering temperature of the polymer. The other requirements of lubricants include high purity, low odor, low polar components, high auto-ignition temperature, low surface tension, and low skin irritation. Common lubricants are synthetic isoparaffmic hydrocarbons available in a wide boiling range. Some of the commercial lubricants include Isopar solvents (available from Exxon Corp.), mineral spirits, and VM P Naphtha (available from Shell Corp.). 

Agents Not To Be Used Water may be ineffective Special Hazards of Combustion Products Not pertinent Behavior in Fire Not pertinent Ignition Temperature (°F) 540 (mineral spirits) Electrical Hazard Not pertinent Burning Rate 4 mm/min. Chemical Reactivity — Reactivity with Water No reaction Reactivity with Common Materials No reaction Stability During Transport Stable Neutralizing Agents for Acids and Caustics Not pertinent Polymerization Not pertinent Inhibitor of Polymerization Not pertinent. 

Oils, Miscellaneous Mineral — Fire Hazards Flash Point (deg. F) 380 OC Flammable Limits in Air (%) Data not available Fire Extinguishing Agents Dry chemical, foam, or carbon dioxide Fire Extinguishing Agents Not to be Used Water or foam may cause frothing Special Hazards of Combustion Products Not pertinent Behavior in Fire Not peitinent Ignition Temperature (deg. F) 500 - 700 Electrical Hazard Not peninent Burning Rate 4 mm/min. Chemical Reactivity ... 

Rubidium can be liquid at room temperature. It is a soft, silvery-white metallic element of the alkali group and is the second most electropositive and alkaline element. It ignites spontaneously in air and reacts violently in water, setting fire to the liberated hydrogen. As with other alkali metals, it forms amalgams with mercury and it alloys with gold, cesium, sodium, and potassium. It colors a flame yellowish violet. Rubidium metal can be prepared by reducing rubidium chloride with calcium, and by a number of other methods. It must be kept under a dry mineral oil or in a vacuum or inert atmosphere. 

Boron does not react with water at ambient temperatures. The powdered amorphous form, however, reacts slowly at 100°C producing horic acid. The amorphous metal reacts slowly with dilute mineral acids at ambient temperatures the crystalline form is inert. The former, however, reacts vigorously with concentrated nitric acid. The amorphous powder ignites in oxygen at... 

Ytterbium oxide is produced as an intermediate in recovering ytterbium from minerals (See Ytterbium). After opening the ore by digestion with concentrated sulfuric acid or caustic soda solution at high temperatures, rare earths are separated by ion exchange, solvent extraction, or fractional precipitation. Ytterbium fraction is treated with oxahc acid or sodium oxalate to precipitate jdterbium oxalate, which is ignited to yield ytterbium oxide. 

---