Sartomer BU, Arkema Inc.,
Keywords: isocyanate-free, polyurethane, spray foam, insulation, acrylate
Summary:Spray polyurethane foam (SPF) insulation is the subject of scrutiny and regulation due to worker health concerns. California has proposed to name SPF containing di-isocyanates as a priority product under the Safer Consumer Products (SCP) program. Some argue that the current regulations do not require substitution of hazards, but rather seek to impose controls to manage them. To this end, we report an alternative approach to producing foams while eliminating the use of isocyanates. As with polyurethane foams, our system consists of two stable liquid components. Upon combining and briefly mixing, the liquids react producing heat sufficient to volatilize a blowing agent to make the foamed product. We will also demonstrate that this technology offer control over various properties of the foam such as hardness, density, compressive strength, pore size and morphology. This method mainly utilizes acrylates, which are commonly used in paints, inks, adhesives and personal care products such as nail polish. We believe that this technology not only paves the way for a safer alternative to SPFs but any application that requires the use of foam.