ARTICLE, LAMINATE AND ASSOCIATED METHODS
An article includes a porous membrane having pores, a first selectively permeable coating supported by the membrane and a component protective against delamination of the selectively permeable coating from the porous membrane and/or any other coatings applied thereto. The first selectively permeable coating includes an antichemical, antibiological, antiradiological and/or antimicrobial agent. The protective component may be provided alone, or as an element of the first selectively permeable coating, or, a second selectively permeable coating. A laminate and methods of providing these are also provided.
1 . An article, comprising:
a porous membrane;
a first selectively permeable coating supported by the membrane and comprising an effective amount of an antichemical, antibiological, antiradiological and/or antimicrobial agent; and
a component protective against delamination of the first selectively permeable coating from the porous membrane and/or any other coatings applied thereto.
2 . The article of claim 1 , wherein the component comprises an element of the first selectively permeable coating.
3 . The article of claim 1 , wherein the component comprises an element of a second selectively permeable coating.
4 . The article of claim 3 , wherein the second selectively permeable coating coats substantially the entirety of the first selectively permeable coating.
5 . The article of claim 1 , wherein the component comprises an organic polymer.
6 . The article of claim 5 , wherein the component comprises one or more polyurethanes, polyallyamines, polyvinylamines, polyvinylalcohols, or copolymers or blends of these.
7 . The article of claim 6 , wherein the component comprises a copolymer of one or more polyvinylalcohols and one or more polyvinylamines.
8 . The article of claim 1 , wherein the membrane comprises one or more of polyalkene, polyarylene, polyamide, polyester, polysulfone, polyether, polyacrylic, polystyrene, polyurethane, polyarylate, polyimide, polycarbonate, polysiloxane, polyphenylene oxide, cellulosic polymer, or substituted derivatives thereof.
9 . The article of claim 8 , wherein the membrane comprises a fluorinated polymer.
10 . The article of claim 9 , wherein the fluorinated polymer comprises one or both of polyvinylidene fluoride or polytetrafluoroethylene.
11 . The article of claim 10 , wherein the fluorinated polyolefin comprises expanded polytetrafluoroethylene.
12 . The article of claim 1 , wherein the first selectively permeable coating comprises two or more layers, wherein at least one layer comprises at least one antichemical, antibiological, antiradiological and/or antimicrobial agent.
13 . The article of claim 12 , wherein the first selectively permeable coating further comprises a polymeric component active against chemical, biological, radiological or antimicrobial agents.
14 . The article of claim 13 , wherein the polymeric component comprises a hydroxyalkyl-substituted polyalkyleneimine.
15 . The article of claim 1 , wherein the article has a permeability to a chemical biological or microbial agent that is less than about 20 micrograms/cm 2 /24 hours for DFP.
16 . A laminate comprising the article as defined in claim 1 and at least one additional membrane.
17 . An apparel item comprising the laminate of claim 16 , wherein the apparel comprises outerwear.
18 . An apparel comprising the laminate of claim 16 , wherein the apparel is capable of being worn against exposed skin.
19 . A method comprising applying to a porous membrane (i) a first selectively permeable coating comprising an effective amount of an antichemical, antibiological, antiradiological and/or antimicrobial agent and (ii) a component protective against delamination of the first selectively permeable coating from the porous membrane and/or any other coatings applied thereto.
20 . The method of claim 19 , wherein the component is also an element of the selectively permeable coating.
21 . The method of claim 19 , wherein the component is provided as an element of a second selectively permeable coating.
22 . The method of claim 21 , wherein the second selectively permeable coating coats substantially the entirety of the first selectively permeable coating.
23 . The method of claim 19 , wherein the first selectively permeable coating further comprises a polymeric component and the method further comprises curing the polymeric component.