A process for impregnating a porous material with a cross-linkable composition is disclosed. The degree of impregnation and placement of the cross-linkable composition within the pores of the porous material can be controlled very precisely through the use of a pressure differential. The pressure differential...http://www.google.de/patents/US6797311?utm_source=gb-gplus-sharePatent US6797311 - Process for impregnating a porous material with a cross-linkable composition
