Catalysts for extending the shelf life of formulations for produ

Details Catalysts for extending the shelf life of formulations for produ Catalysts for extending the shelf life of formulations for produ

1991-09-23

1992-05-12

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521155, C08J 914

Patent

active

051128780

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 semi-rigid polyurethane foam.

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