Blowing Agent
blowing agent
[′blō·iŋ ‚ā·jənt]Blowing agent
Blowing Agent
a substance used in the manufacture of porous materials to create a system of connecting pore channels or isolated pore cells in an initially dense body (medium).
Blowing agents include various organic and mineral compounds, such as Porofors and carbonates, which generate gases upon decomposition or upon reacting with the components of the solidifying product—for example, a synthetic resin or concrete mix. A second type of blowing agent is a substance that is added to a material as a filler and then washed out of the solid intermediate product with solvents. Blowing agents are used in the manufacture of porous articles and materials made of plastic, rubber, cement, clay, glass, and metal.