PROCESS FOR TREATING A POROUS SUBSTRATE TO ACHIEVE IMPROVED WATER AND OIL REPELLENCY

摘要

Oil and water repellency is conferred upon porous substrates (10) by treatment with a solution of a monomer (16) of the formula: (C n F2n+1)(CH2)x(CHR)OCOCH = CH2 where n is an integer; X is 0, 1, 2 or 3 and R is H or CH2-OCOCH=CH2. The monomer is polymerized in situ upon the substrate to provide a conformal coating (16') which preserves the porous structure.