Process for producing n=c=o foams and the controlled pre-...

Details Process for producing n=c=o foams and the controlled pre-... Process for producing n=c=o foams and the controlled pre-...

C - Chemistry, Metallurgy

08

G

C08G 18/06 (2006.01) C08G 18/70 (2006.01) C08J 9/12 (2006.01) C08J 9/14 (2006.01) C08J 9/18 (2006.01)

Patent

CA 2075975

2075975 9112287 PCTABS00006 A method for producing polymeric foams based upon the N=C=O technology, intended for thermal insulation, floatation, rigidization, and like comprises the use of a liquid gas blowing agent, such as a liquid CO2 in the production of the foam. In addition, the present invention relates to the control of the amount of pre-expansion and post-expansion of the foam. This control can be provided through both the use of a co-blowing agent as well as controlling the pressure at the mixing zone.

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