Method of increasing the cell volume of pur foams

Details Method of increasing the cell volume of pur foams Method of increasing the cell volume of pur foams

C - Chemistry, Metallurgy

08

J

C08J 9/228 (2006.01) C08G 18/48 (2006.01)

Patent

CA 2521454

The mean pore number of conventional open-celled PUR foams having at least 8 ppi can be significantly reduced if the foam is stored in a liquid compound having an aromatic skeleton and at least one hydroxy group or in such a compound dissolved in a solvent. During this treatment, the foam experiences an increase in volume of at least 10% without the pores collapsing. Ceramic foams produced from open-celled PUR foam having a mean pore count of less than 8 ppi are particularly suitable as flame zone structure for pore burners.

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