초록 ▼

Coated porous materials that exhibit air permeability and repellency to liquids having a surface tension at least equal to or greater than 20 dynes/cm which are suitable for making ileostomy vent filters, transdermal drug substrates, agricultural and medical apparel, as well as paint and chemical pr

Coated porous materials that exhibit air permeability and repellency to liquids having a surface tension at least equal to or greater than 20 dynes/cm which are suitable for making ileostomy vent filters, transdermal drug substrates, agricultural and medical apparel, as well as paint and chemical protective garments. The coating for the porous material is applied as a curable composition containing fluorocarbon urethane precursors which are cross-linked in situ.

대표청구항 ▼

[ We claim:] [1.] A coated porous material comprising:(a) a porous material having a pore size between 0.01 and 250 micrometers and(b) a curable crosslinkable coating composition applied to said material comprising fluorocarbon urethane precursors including:(i) a polyisocyanate;(ii) a polyhydric alc

[ We claim:] [1.] A coated porous material comprising:(a) a porous material having a pore size between 0.01 and 250 micrometers and(b) a curable crosslinkable coating composition applied to said material comprising fluorocarbon urethane precursors including:(i) a polyisocyanate;(ii) a polyhydric alcohol; wherein at least one member of (i) or (ii) has a functionality of greater than 2, and(iii) a perfluoroalkyl alcohol of the formula EQU R--CH.sub.2).sub.x -OH, which R is [ STR 8 ] where x is 1-12, n is 3-20, and R.sup.1 is H, alkyl of 1-4 carbon atoms or --(CH.sub.2).sub.x -OH, wherein said composition is crosslinked after it is applied to said material and wherein the pore pathways through said material are not blocked or plugged with the coating.