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.co.uk/patents/US20030143330?utm_source=gb-gplus-sharePatent US20030143330 - Process for impregnating a porous material with a cross-linkable composition
