Method for inhibiting the degradation of hydrochlorofluorocarbon

Details Method for inhibiting the degradation of hydrochlorofluorocarbon Method for inhibiting the degradation of hydrochlorofluorocarbon

1994-06-15

1995-11-07

Seidleck, James J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 98, 521128, 521131, 521155, 521170, C08J 914

Patent

active

054648823

ABSTRACT:
The invention relates to a method for inhibiting the degradation by dehydrohalogenation of hydrochlorofluorocarbons, such as for example the mixture of 123 and 123a, used as foaming agents during the formation reaction of foamed polyurethanes or polyisocyanurates starting from polyols and polyisocyanates. Prior to the reaction starting, a little amount of a stabilizing substance selected from the group consisting of nitromethane, nitroethane and 1-nitropropane is added to the reaction medium.

REFERENCES:
patent: 3085116 (1963-04-01), Kvalnes
patent: 4463189 (1984-07-01), Hoffmann et al.
patent: 4997589 (1991-03-01), Lund et al.
patent: 5035833 (1991-07-01), Ogawa et al.
patent: 5124503 (1992-06-01), Li et al.
patent: 5137929 (1992-08-01), Demmin et al.

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