process for treating a porous substrate to achieve improved water and oil repellency
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United States of America Patent
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Oct 20, 1992
Issued Date -
N/A
app pub date -
Jul 18, 1990
filing date -
Jul 24, 1989
priority date (Note) -
Expired
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Abstract
Oil and water repellency is conferred upon porous substrates (10) by treatment with a solution of a monomer (16) of the formula: (C.sub.n E.sub.2n+1)(CH.sub.2).sub.x (CHR)OCOCH.dbd.CH.sub.2 where n is an integer; X is 0,1,2 or 3 and R is H or CH.sub.2 --OCOCH.dbd.CH.sub.2. The monomer is polymerized in situ upon the substrate to provide a conformal coating (16') which preserves the porous structure.
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