Blowing agent and process for preparing polyurethane foam

Details Blowing agent and process for preparing polyurethane foam Blowing agent and process for preparing polyurethane foam

1991-05-20

1992-11-17

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, C08J 912

Patent

active

051644193

ABSTRACT:
The use of 1,1-difluoroethane (HFC-152a) with a minimum amount of water, preferably in the absence of water, as the blowing agent is discolored as an efficient route to a rigid closed-cell polyurethane or polyisocyanurate foam of improved cell structure and excellent insulation properties.

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patent: 4927863 (1990-05-01), Bartlett et al.
patent: 4972003 (1990-11-01), Greenbauer et al.
patent: 4981879 (1991-01-01), Snider
patent: 4997589 (1991-03-01), Lund et al.
patent: 4997706 (1991-03-01), Smits et al.

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