OpteonTM foam blowing agents are based on hydrofluoroolefin (HFO) chemistry. They produce thermal insulating foam that enables builders and designers to achieve a higher insulating effectiveness with the same thickness or the same R-value with a thinner layer of insulation than previous generation products.
What is a blowing agent used for?
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 polymers, plastics, and metals. They are typically applied when the blown material is in a liquid stage.
What is HFO insulation?
Permax® 2.0 HFO is a 4th generation, low-global warming potential, 2-component polyurethane spray foam system consisting of resin components A and B, which when sprayed through plural component spray equipment, will produce a premium seamless, monolithic, and durable closed-cell polyurethane foam air barrier / ...
What does HFO stand for in spray foam?
The introduction of commercially viable fourth-generation – hydrofluoroolefin (HFO) – foam blowing agents with low global warming potential (GWP) led to SNAP Rules 20 and 21, which prohibit the use of certain hydrofluorocarbon (HFC) blowing agents in spray polyurethane foam.
What is HFC blowing agents?
A blowing agent is an additional gaseous ingredient that causes the sprayed foam insulation to expand up to 30 times its original volume and fill with ‘bubbles’ (otherwise known as ‘closed cells’) that add insulative value and rigidity to the foam.
What are the types of blowing agent?
- Endothermic (heat consuming) and.
- Exothermic (heat releasing) blowing agents.
Is water a blowing agent?
The oldest and most common blowing agent is water, which reacts with the isocyanates liberating carbon gas and forming polyurea rigid structures. The auxiliary blowing agents (ABAs) are low boiling point compounds, also used in foam formulation.
Why is pentane a good blowing agent?
Pentane-blown foams have another advantage: better dimensional stability due to the fact that pentane does not condense as much as HCFC-141b at temperatures normally experienced by the foam in use. The condensation of HCFC-141b causes the cells to shrink and expand on a cyclical basis, reducing dimensional stability.”
Do foam blowing agents deplete ozone layer?
Chemical refrigerants and foam blowing agents are harmful to the environment – they can cause ozone layer depletion and are powerful greenhouse gases. ... Hydrofluorocarbons (HFCs) have become a popular replacement for CFCs and HCFCs since they pose no harm to the ozone layer.
How do you make hydrofluorocarbons?
For example, HFC-134a (1,1,1,2-tetrafluoroethane, or R134a), one of the most widely used HFCs, can be prepared from trichloroethylene or tetrachloroethylene through halogen exchange and hydrofluorination , in which chlorine is replaced by hydrogen and fluorine, or through isomerization followed by hydrogenolysis, in ...
Is pentane a blowing agent?
Blowing agent
Pentane is a hydrocarbon solvent coming directly from the natural gas and crude oil. ... Pentane as blowing agent in (PUR) insulation foam : N-Pentane (CAS : 78-78-4)
How does a foaming agent work?
A foaming agent is a material that facilitates the formation of foam such as a surfactant or a blowing agent. A surfactant, when present in small amounts, reduces surface tension of a liquid (reduces the work needed to create the foam) or increases its colloidal stability by inhibiting coalescence of bubbles.
What type of plastic is polyurethane?
Polyurethane is a polymer joined by urethane links . These links are formed by reacting a di- or poly-isocyanate with a polyol. Polyurethane is unique in that it is not manufactured like many other plastics. Most polymers, such as polyethylene, are produced in the form of a powder and then molded into a desired form.
Is ethanol a blowing agent?
Several CO 2 -based mixtures have also been used as blowing agent . For instance, Champagne et al. used ethanol and 1,1,1,2-tetrafluoroethane (HFC-134a) as a co-blowing agent for the foaming of PS [64] and PE [65], respectively. ...
What are examples of gas blown plastics?
Foam insulation – this includes polystyrene (Styrofoam), polyurethane , and polyisocyanurate (Polyiso) in both board and blown in varieties. In each of these cases, a plastic is “blown” with a gas to create a foam that has a large number of voids incorporating the gas, and hence a high insulation value.
What is the blowing agent for open cell foam?
The blowing agent used to install open-cell insulation is water , which reacts with air to become carbon dioxide. Because CO2 expands quickly, the bubbles tend to burst before the plastic sets — hence “open cell” — producing a spongy, lightweight foam.
