Blowing Agents

Some articles on blowing agents, blowing agent, agent:

Polyurethane - Chemistry
... Resin blend additives may include chain extenders, cross linkers, surfactants, flame retardants, blowing agents, pigments, and fillers ... Blowing agents such as water, certain halocarbons such as HFC-245fa (1,1,1,3,3-pentafluoropropane) and HFC-134a (1,1,1,2-tetrafluoroethane), and hydrocarbons such as n-pentane, can be ... the polymerization reaction is exothermic, these blowing agents volatilize into a gas during the reaction process ...
Blowing Agent
... A blowing agent is a substance which is capable of producing a cellular structure via a foaming process in a variety of materials that undergo hardening or phase transition, such as ... Blowing agents (also known as 'pneumatogens') or related mechanisms to create holes in a matrix producing cellular materials, have been classified as follows Physical blowing agents e.g ... from a melt process or the chemical exotherm due to cross-linking), to volatile a liquid blowing agent ...
Polyurethane - History
... As the decade progressed, the availability of chlorofluoroalkane blowing agents, inexpensive polyether polyols, and methylene diphenyl diisocyanate (MDI) heralded ... (including foam rubber) is often made by adding small amounts of volatile materials, so-called blowing agents, to the reaction mixture ... greatly reduced use of many chlorine-containing blowing agents, such as trichlorofluoromethane (CFC-11) ...
Building Insulation Materials - Spray Foam - Types
... Blown with air (no CFCs, HCFCs or other harmful blowing agents) ... Fully sustainable Consists of phenolic, a foaming agent, and air ... Blown with air (no CFCs, HCFCs or other harmful blowing agents) ...

Famous quotes containing the words agents and/or blowing:

    Modern man’s capacity for destruction is quixotic evidence of humanity’s capacity for reconstruction. The powerful technological agents we have unleashed against the environment include many of the agents we require for its reconstruction.
    George F. Will (b. 1941)

    Many Americans imagine simpler times even as a storm of social change swirls about, blowing parents here and children there. Sure, the 1950s ideal world would be wonderful. But knock on the nation’s doors: Ozzie and Harriet are seldom at home.
    Leslie Dreyfous (20th century)