Blowing Agent


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blowing agent

[′blō·iŋ ‚ā·jənt]
(materials)
A chemical added to plastics and rubbers that generates inert gases on heating, causing the resin to assume a cellular structure. Also known as foaming agent.

Blowing agent

Compound used in producing foam insulation. Mixed as a liquid with the foam ingredients under pressure, the blowing agent evaporates, creating gas bubbles that provide the insulation.

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.

References in periodicals archive ?
Blowing agent blends made with HFCs and hydrocarbons can have GWPs of more than 150.
UNEP is assisting the Kingdom to adopt new, more energy efficient blowing agent technology which will help the nation meet its energy targets.
2], so called dry ice, is of interest as blowing agent for polymer foams as the dosage in form of pellets allows introducing the blowing agent over the material feed.
Honeywell said that Solstice LBA is a next-generation blowing agent with a global warming potential of 1, significantly lower than previous-generation hydrofluorocarbon blowing agents.
The new blowing agent being developed is a non-flammable liquid that will assist customers in reducing the overall environmental impact of foam.
In 2006, Honeywell introduced its low-GWP portfolio, which is based on hydrofluoroolefin (HFO) technology, and last year it commercialised HFO-1234ze, a low-GWP gaseous blowing agent for one-component foam in Europe.
has developed a technique that uses pure carbon dioxide, instead of CFCs and HCFCs, as the propellant, or blowing agent, in the manufacture of polystyrene foam.
As manufacturers of home refrigerators prepare to select the next-generation blowing agent to use with polyurethane foam after 2002, Bayer Corporation, Pittsburgh, PA, is providing original research on blowing agent options, and is offering the resources of its state-of-the-art Appliance Lab.
During production, a blowing agent blows gas into the polystyrene.
It is a result of diffusion of the blowing agent, typically pentane, out of the cells and its replacement in the cells by air.
Dabco PM301 catalyst - a patented, non-emissive, organic modifier that can promote HFO blowing agent solubility in SPF applications.
Also, since physical blowing agent is injected into the primary extruder, the screw in the extruder plays an important role in dispersing the blowing agent into extremely fine droplets.