Catalysts for extending the shelf life of formulations for producing rigid polyurethane foams
AssigneeBASF SE
InventorsTodd W. Wishneski, Donald E. Margitich
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Abstract
The present invention relates to an improved process for producing, by means of a portable foaming apparatus having a static mixer, a polyurethane foam by reacting a reaction mixture comprised of a polyol, an organic isocyanate, a foaming/frothing agent, and a reaction catalyst, the improvement comprising employing monochlorodifluoromethane as at least a portion of said blowing/frothing agent in said reaction and employing an acid-blocked amine catalyst as at least a portion of said reaction catalyst in order to produce a CFC-free essentially closed-cell rigid or simi-rigid polyurethane foam.
Claims1
A composition, useful as a B-side polyurethane formulation in a portable foaming apparatus having a static mixer, wherein the composition comprises:
- a polyol, monochlorodifluoromethane, and an acid-blocked amine catalyst.
Dependencies are inferred from the claim text.