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

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

1993-07-26

1994-07-12

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521126, 521127, 521129, 521131, 521174, 521917, C08J 914

Patent

active

053289382

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 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.

REFERENCES:
patent: 5032623 (1991-07-01), Keske et al.
patent: 5264464 (1993-11-01), Wishneski et al.

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