FILTER MEDIA COMPRISING FLUORINATED AND NON-FLUORINATED WATER REPELLENT ADDITIVES
Filter media comprising fluorinated water-repellent additives and/or water-repellent additives having minimal or no fluorine atoms are generally provided. Filter media disclosed herein may include fluorinated water-repellent additives but not water-repellent additives having minimal or no fluorine atoms, water-repellent additives having minimal or no fluorine atoms but not fluorinated water-repellent additives, or both fluorinated water-repellent additives and water-repellent additives having minimal or no fluorine atoms.
1 . A filter media, comprising:
a non-woven fiber web;
a first water-repellent additive; and
a second water-repellent additive, wherein:
the first water-repellent additive comprises one or more water-repellent functional groups;
each water-repellent functional group of the first water-repellent additive is independently an alkyl group comprising greater than or equal to 3 carbon atoms, an alkenyl group comprising greater than or equal to 3 carbon atoms, and/or an alkynyl group comprising greater than or equal to 3 carbon atoms;
each water-repellent functional group of the first water-repellent additive is independently a side chain of a repeat unit of a polymer and/or bonded to a silicon atom and/or a metal atom; and
the second water-repellent additive comprises a fluorinated polymer a fluorinated oligomer, and/or a fluorinated monomer.
2 . A filter media, comprising:
a non-woven fiber web;
a first water-repellent additive; and
a fluorinated resin, wherein:
the first water-repellent additive comprises one or more water-repellent functional groups;
each water-repellent functional group of the first water-repellent additive is independently an alkyl group comprising greater than or equal to 3 carbon atoms, an alkenyl group comprising greater than or equal to 3 carbon atoms, and/or an alkynyl group comprising greater than or equal to 3 carbon atoms; and
each water-repellent functional group of the first water-repellent additive is independently a side chain of a repeat unit of a polymer and/or bonded to a silicon atom and/or a metal atom.
3 - 5 . (canceled)
6 . A filter media as in claim 1 , wherein the fluorinated polymer is a perfluoropoly(ether).
7 . A filter media as in claim 1 , wherein the fluorinated polymer is a fluorinated poly(urethane).
8 . A filter media as in claim 1 , wherein the fluorinated polymer comprises a plurality of fluorinated side chains.
9 . A filter media as in claim 8 , wherein the fluorinated side chains comprise the structure —C n F m R y .
10 . A filter media as in claim 9 , wherein n is 3-4, m is ≥1, R is an atom or a group of atoms, and y≥0.
11 . (canceled)
12 . A filter media as in claim 8 , wherein the fluorinated side chains comprise the structure —(CF 2 ) n CF 3 .
13 . A filter media as in claim 12 , wherein n is 2-3.
14 - 20 . (canceled)
21 . A filter media as in claim 1 , wherein the second water-repellent additive makes up greater than or equal to 1 wt % and less than or equal to 100 wt % of the total weight of the first water-repellent additive and the second water-repellent additive.
22 . (canceled)
23 . A filter media as in claim 1 , wherein the second water-repellent additive makes up greater than or equal to 0.01 wt % and less than or equal to 50 wt % of the filter media.
24 . A filter media as in claim 1 , wherein the metal in the first water-repellent additive is titanium, zirconium, and/or aluminum.
25 . A filter media as in claim 1 , wherein the first water-repellent additive is a reaction product of a silane, a titanate, a zirconate, and/or an aluminate.
26 - 28 . (canceled)
29 . A filter media as in claim 1 , wherein the polymer in the first water-repellent additive is a poly(siloxane), a poly(silazane), a poly(acrylate), a poly(urethane), a poly(ether), a poly(urea), a poly(ester), and/or a poly(carbodiimide).
30 - 36 . (canceled)
37 . A filter media as in claim 1 , wherein the polymer in the first water-repellent additive is a hydrolysis product of a species comprising a metal atom, a hydrolysable functional group, and a water-repellent functional group.
38 . A filter media as in claim 1 , wherein the first water-repellent additive comprises a silanol, a siloxide, a siloxane, and/or a silyl ether.
39 - 71 . (canceled)
72 . A filter media as in claim 1 , wherein the non-woven fiber web comprises glass fibers.
73 . A filter media as in claim 72 , wherein the glass fibers comprise microglass fibers and/or chopped strand glass fibers.
74 . A filter media as in claim 73 , wherein the non-woven web comprises two or more types of microglass fibers having different average diameters.
75 - 83 . (canceled)
84 . A filter media as in claim 1 , wherein the non-woven fiber web comprises synthetic fibers and/or cellulose fibers.
85 - 106 . (canceled)