Arkema announces new, high performance, low GWP blowing agent for polyurethane foams KING OF PRUSSIA, Pa., Sept. 20, 2013 (GLOBE NEWSWIRE) -- Arkema has patented the use of Forane® 1233zd as a blowing agent in the manufacture of polyurethane foams: US Pat. No. 8,314,159 and EP...