Anti-pathogenic air filtration media and air handling devices having protective capabilities against infectious airborne mircoorganisms
AssigneeInnovative Construction and Building Materials
InventorsDavid S. Soane, Christopher D. Tagge
Life of this patent
Estimating the term…
Abstract
The present invention provides an anti-pathogenic air filtration medium comprising a fibrous substrate whose fibers are coated with coating comprising a polymer. The coating provides an environment that is destructive to airborne pathogens. In particular, the filter medium can be used in a building air handling system that both filters the air and eliminates pathogens. The filter medium also can be used to create a new bio-protective gas mask that not only offers protection against chemical warfare agents, but also provides protection against biological pathogens.
Claims57
An anti-pathogenic air filtration medium comprising:
- a) a fibrous substrate comprising a plurality of intermingled fibers and
- b) surrounding each of a substantial proportion of the plurality of fibers, an anti-pathogenic coating comprising an anti-pathogenic polymer network selected from the group consisting of cross-linked poly(styrenesulfonic acid) (free acid or salt), cross-linked polyacrylic acid (free acid or salt), cross-linked poly(methacrylic acid), cross-linked poly(vinyl pyridine) quaternary ammonium salts and cross-linked polyethylenimine quaternary ammonium salts and co-polymers thereof.
An anti-pathogenic air filtration medium comprising:
- a) a fibrous substrate comprising a plurality of intermingled fibers and
- b) surrounding each of a substantial proportion of the plurality of fibers, an anti-pathogenic coating comprising an anti-pathogenic polymer network selected from the group consisting of cross-linked poly(styrenesulfonic acid) (free acid or salt), cross-linked polyacrylic acid (free acid or salt), cross-linked poly(methacrylic acid), cross-linked poly(vinyl pyridine) quaternary ammonium salts and cross-linked polyethylenimine quarternary ammonium salts and co-polymers thereof, wherein the polymer network is a randomly cross-linked polymer.
An anti-pathogenic air filtration medium comprising:
- a) a fibrous substrate comprising a plurality of intermingled fibers and
- b) surrounding each of a substantial proportion of the plurality of fibers, an anti-pathogenic coating comprising an anti-pathogenic polymer network selected from the group consisting of cross-linked poly(styrenesulfonic acid) (free acid or salt), cross-linked polyacrylic acid (free acid or salt), cross-linked poly(methacrylic acid), cross-linked poly(vinyl pyridine) quaternary ammonium salts and cross-linked polyethylenimine quaternary ammonium salts and co-polymers thereof, wherein the polymer network is cross-linked 4-styrenesulfonic acid.
An anti-pathogenic air filtration medium comprising:
- a) a fibrous substrate comprising a plurality of intermingled fibers and
- b) surrounding each of a substantial proportion of the plurality of fibers, an anti-pathogenic coating comprising an anti-pathogenic polymer network selected from the group consisting of cross-linked poly(styrenesulfonic acid) (free acid or salt), cross-linked polyacrylic acid (free acid or salt), cross-linked poly(methacrylic acid), cross-linked poly(vinyl pyridine) quaternary ammonium salts and cross-linked polyethylenimine quaternary ammonium salts and co-polymers thereof, wherein the polymer network contains quaternary ammonium functionality.
An anti-pathogenic air filtration medium comprising:
- a) a fibrous substrate comprising a plurality of intermingled fibers and
- b) surrounding each of a substantial proportion of the plurality of fibers, an anti-pathogenic coating comprising a polymer network wherein the polymer network is a gel-forming polymer and the coating further comprises a non-volatile anti-pathogenic liquid.
An anti-pathogenic air filtration medium comprising:
- a) a fibrous substrate comprising a plurality of intermingled fibers and
- b) surrounding each of a substantial proportion of the plurality of fibers, an anti-pathogenic coating comprising a polymer network wherein the polymer network is a covalently cross-linked linear polymer.
A process for fabricating an anti-pathogenic air filtration medium comprising:
- a) wetting a fibrous substrate comprising a plurality of intermingled fibers with a solution of pre-polymer wherein the pre-polymer is a mixture of 4-styrenesulfonic acid and a cross-linking agent, and
- b) curing the pre-polymer in the solution wetting the fibers to form an anti-pathogenic polymer network about the fibers.
A process for fabricating an anti-pathogenic air filtration medium comprising:
- a) wetting a fibrous substrate comprising a plurality of intermingled fibers with a solution of pre-polymer, wherein the pre-polymer is a mixture of vinyl pyridine and a cross-linking agents,
- b) curing the pre-polymer in the solution wetting the fibers to form a polymer network about the fibers, and p1 c) contacting the fibrous substrate with an alkyl bromide to convert pendant pyridine groups on the polymer network to quaternary ammonium salts to make the polymer network anti-pathogenic.
A process for fabricating an anti-pathogenic air filtration medium comprising:
- a) wetting a fibrous substrate comprising a plurality of intermingled fibers with a solution of pre-polymer, wherein the pre-polymer is a mixture of a quaternary ammonium salt of vinyl pyridine and a cross-linking agent, and
- b) curing the pre-polymer in the solution wetting the fibers to form an anti-pathogenic polymer network about the fibers.
A process for fabricating an anti-pathogenic air filtration medium comprising:
- a) wetting a fibrous substrate comprising a plurality of intermingled fibers with a solution of pre-polymer
- b) curing the pre-polymer in the solution wetting the fibers to form a gel-forming polymer network about the fibers;
- and
- c) contacting the fibrous substrate with an anti-pathogenic liquid of:
- a solution of an acid, base or oxidant in at least one non-volatile diluent;
- a metal colloid suspension in at least one non-volatile diluent;
- or a surfactant-laden non-volatile oil.
A neutralizing filtration medium for neutralizing a substance in a fluid, comprising:
- a) a fibrous substrate comprising a plurality of intermingled fibers;
- and
- b) a coating comprising a gel-forming polymer layer and auxiliary substances surrounding each of a substantial proportion of the plurality of intermingled fibers, wherein the auxialiary substances are capable of chemically neutralizing at least one harmful gas, vapor or aerosol.
A neutralizing filtration medium for neutralizing a substance in a fluid, comprising:
- a) a fibrous substrate comprising a plurality of intermingled fibers;
- and
- b) a coating comprising a gel-forming polymer layer and auxiliary substances surrounding each of a substantial proportion of the plurality of intermingled fibes, wherein the auxiliary substances are capable of chemically neutralizing at least one harmful gas, vapor or aerosol, wherein the auxiliary substances include an oxidizing substance.
Dependencies are inferred from the claim text.