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

C - Chemistry, Metallurgy

08

J

C08J 9/14 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2115547

The use of 1,1-difluoroethane (HFC-152a) and dimethyl ether, optionally with up to 50 mole % of water, as the blowing agent is disclosed 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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