| abstract |
A storage-stable two-component polyurethane or polyisocyanurate spray foam composition is disclosed, the composition comprising: (a) an A-side component comprising at least one polyisocyanate and at least one catalyst; and (b) a B-side component comprising at least one polyol; further comprising one or more hydrohaloolefin blowing agents in the A-side component or the B-side component, or both; Both the A-side component and the B-side component individually produce less than 600 ppm of fluoride ions after 2 weeks of aging at 50°C. |