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Spray foam insulation or spray polyurethane foam (SPF) is an alternative to traditional building insulation such as fiberglass. A two-component mixture composed of isocyanate and polyol resin comes together at the tip of a gun, and forms an expanding foam that is sprayed onto roof tiles, concrete slabs, into wall cavities, or through holes ...
BASF plant in Ludwigshafen, 1865. BASF is an acronym for Badische Anilin- und Sodafabrik (German for 'Baden Aniline and Soda Factory'). It was founded by Friedrich Engelhorn on 6 April 1865 in Mannheim, in the German-speaking state of Baden. Engelhorn had been responsible for setting up a gasworks and street lighting for the town council in 1861.
Firefighting foam is a foam used for fire suppression. Its role is to cool the fire and to coat the fuel, preventing its contact with oxygen, thus achieving suppression of the combustion. Firefighting foam was invented by the Moldovan engineer and chemist Aleksandr Loran in 1902. [1] The surfactants used must produce foam in concentrations of ...
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The foam fractionation technique is a derivation of traditional absorptive bubble separation techniques used by industries for decades to extract amphiphilic contaminants. The absence of a solid absorptive surface reduces consumables and waste byproducts and produces a liquid hyper-concentrate which can be fed into one of the various PFAS ...
Polyurethane foam (including foam rubber) is sometimes made using small amounts of blowing agents to give less dense foam, better cushioning/energy absorption or thermal insulation. In the early 1990s, because of their impact on ozone depletion , the Montreal Protocol restricted the use of many chlorine -containing blowing agents, such as ...
The answer hinges, Hall says, on when the “most contested, most crucial battleground states finish counting.”. And that, experts say, is not likely to happen on Nov. 5. Write to Simmone Shah ...
October 15, 2024 at 3:54 PM. A U.S. Navy parachutists crashed into a crowd of spectators at San Francisco's Fleet Week on Sunday, injuring a mother and her daughter. The parachutist, a member of ...
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