A foaming agent is a material that will decompose to release a gas under certain conditions (typically high temperature), which can be used to turn a liquid into a foam. chemical decomposition is the gradual fragmentation of a chemical compound into smaller molecules. ...
For Example, powdered titanium hydride is used as a foaming agent in the production of metal foams, as it decomposes to form titanium and hydrogen gas at elevated temperatures. Open celled metal foams have a structure similar to open-celled polyurethane foams and have a wide variety of applications including heat exchangers (compact electronics cooling, cryogen tanks, PCM heat exchangers), energy absorption, flow diffusion and lightweight optics. ... Jump to: navigation, search General Name, Symbol, Number titanium, Ti, 22 Chemical series transition metals Group, Period, Block 4, 4, d Appearance silvery metallic Atomic mass 47. ...
See also: antifoaming agent An antifoaming agent is a food ingredient intended to curb effusion or effervescence in preparation or serving. ...
However, it is obvious that protein foamingagents are considerably better in the production of foam concrete than synthetic foamingagents because the main qualities of the protein foamingagents include the possibility to produce far firmer foam concrete of low densities.
Moreover, the foamingagent which is based on organic vegetable raw materials has an increased ratio and a higher resistance of foam in comparison with other imported foamingagents and synthetic ones.
Consequently now it is possible to reduce the consumption of the foamingagent on each cubic meter of foam concrete approximately to 45 % that adds to the quality and the strength of the produced foam concrete.
Foaming of thermoplastics in the majority of applications is now accomplished with exothermic foamingagents, usually azo compounds, which when admixed with the desired thermoplastic polymer in an extruder or molding machine are heated above their decomposition temperatures, and produces nitrogen which forms the cell structure in the molded or extruded part.
In contrast, pellets of foamingagents now produced use lower melting materials, often waxes, to reduce reaction and gas release or alternately the pellets are foamed or even collapsed showing evidence of reaction of the foamingagent during the compounding of the foamingagents (these pellets increasing in size before collapse).
The chemical foamingagents are compounded with the resin carrier in the extruder as the mixture move from the side feeder 14 or hopper 16 to a die 20.
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