On-site generation of polyurethane foam using an HCFC as a sole blowing agent

摘要

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 the sole blowing/frothing agent in said reaction in order to produce a CFC- free essentially closed-cell rigid or semi-rigid polyurethane foam. Also claimed is the foam produced by the above process.