Washington, DC – EPA has added two more low-GWP blowing agents for polyurethane to its list of acceptable substitutes under the Significant New Alternatives Policy (SNAP) programme.
Methylal and HFO-1336mzz(E) (trans-1,1,1,3,3,3-hexafluorobutene) have been approved for both high- and low-pressure spray polyurethane foam, and one-component foam sealants.
HFO-1336mzz(E) is sold under the trade name Opteon 1150 by Chemours. In addition to SPF applications, it has been deemed an acceptable substitute in various other forms of rigid PU foam, including foams for appliances, commercial refrigeration, sandwich panels, slabstock and rigid PU and polyisocyanurate laminated boardstock. It has also been added to the list for integral skin and flexible PU foams,
Methylal was already approved for multiple rigid and flexible applications. It is manufactured by Belgian company Lambiotte & Cie, and sold under the trade name Novicell.
The distributor for Novicell in the US Midwest is Maroon Group, whose executive vice president Jonathon Rhodes hailed the product’s efficiency, handling and cost. ‘Given its superior blowing performance over current options and its compatibility to work alongside multiple blowing agent chemistries, we expect Novicell to be readily used within the polyurethane spray foam markets,’ he said.