AlliedSignal, who adopted the Honeywell name after acquiring it, decided in 1999 to provide a non ozone depleting blowing agent as an alternative for dichlorofluoroethane ( HCFC-141b ) and trichlorofluoromethane ( CFC-11 ).
22.
The process itself is known to be very interesting, because the injected compound is not foam, until an endothermic reaction in a hot mold activates the blowing agents, resulting in an expanded foam part.
23.
Pena said the DOE sought a standard that would minimize the impact of converting from ozone-depleting chemicals currently used as blowing agents for refrigerator foam insulation, which the Environmental Protection Agency will ban in 2003.
24.
Pressed by the committee chairman, Sen . Patrick J . Leahy, D-Vt ., to pledge " unequivocally " that there would be no reprisals against whistle-blowing agents, most notably Coleen Rowley of Minneapolis, Mueller replied : " Absolutely.
25.
Chemical blowing agents e . g . isocyanate and water ( for PUs ), azo-, hydrazine and other nitrogen-based materials ( for thermoplastic and elastomeric foams ), sodium bicarbonate ( aka baking soda, used in thermoplastic foams ).
26.
Anastasius Gr�n wrote : " It was a fatal rashness that the method to use guncotton as blowing agent in guns, developed by Major General Lenk of Wolfsberg, was not pursued further after the explosion of a depot.
27.
Remaining MDI and the tri-isocyanate react with polyol to form a complex poly ( urethane-isocyanurate ) polymer ( hence the use of the abbreviation PUI as an alternative to PIR ), which is foamed in the presence of a suitable blowing agent.
28.
Chloromethane is employed as a greases oils and resins, as a propellant and blowing agent in polystyrene foam production, as a local anesthetic, as an intermediate in drug manufacturing, as a catalyst carrier in low-temperature polymerization, as a fluid for thermometric and thermostatic equipment, and as a herbicide.
29.
Azobisisobutyronitrile is a white powder often used as a photoinitiator for vinyl-based polymers such as polyvinyl chloride, also known as PVC . Because this particular photoinitiator produces nitrogen gas ( N 2 ) upon decomposition, it is often used as a blowing agent to change the shape and / or texture of plastics.
30.
These can be split into key groups, used as polyols, which have recently seen a dramatic increase in demand for their biobased origin and key chemical attributes such as high reactivity, range of functionalities, reduction in blowing agents, and naturally occurring fire retardant properties in the field of ridged polyurethanes aided by their inherent phenolic structure and larger number of reactive units per unit mass.
