Polyurea xerogel

Title:  PROCESS FOR PRODUCING FLAME-RETARDANT POROUS MATERIALS BASED ON POLYUREA

Number:  US2012235070

 Publication date:  20-9-2012

Applicant/Assignee: BASF

Gist: polyfunctional isocyanate and polyfunctional amine are reacted in organic solvent containing soluble flame ratardant.  The solvent is then removed, under subcritical conditions, resulting in a self-standing porous material..

Why it is interesting:  Since a few years there is a surge of BASF patent applications on microporous/nanoporous materials for insulation, and this case is probably only one of many to follow. It appears BASF is taking the lead in this highly promising field for PU insulation.

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