Air filters comprising polymeric sorbents for reactive gases
Assignee3M Innovative Properties Company
InventorsDerek M. Maanum, Michael S. Wendland, Michael W. Kobe, Austin D. Groth, Neal A. Rakow
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Abstract
An air filter including a filter support that supports polymeric sorbent particles. The polymeric sorbent is the reaction product of a divinylbenzene/maleic anhydride precursor polymeric material with a nitrogen-containing compound. The air filter may be used for capturing e.g. reactive gases.
Claims29
An air filter comprising a filter support that supports polymeric sorbent particles, wherein the polymeric sorbent comprises a reaction product of:
- (a) a precursor polymeric material comprising a polymerized product of a polymerizable composition that is a monomer mixture comprising:
- (1) 8 to 65 weight percent maleic anhydride based on the total weight of monomers in the polymerizable composition;
- (2) 30 to 85 weight percent divinylbenzene based on the total weight of monomers in the polymerizable composition;
- and
- (3) 0 to 40 weight percent of a styrene-type monomer based on the total weight of monomers in the polymerizable composition, wherein the styrene-type monomer is styrene, an alkyl-substituted styrene, or a combination thereof;
- and
- (b) a nitrogen-containing compound that is selected from ammonia or a compound having at least one primary amino group or at least one secondary amino group,
- and wherein the polymeric sorbent is present in the form of porous particles.
An air filter comprising a filter support that supports polymeric sorbent particles, wherein the polymeric sorbent comprises a reaction product of:
- (a) a precursor polymeric material comprising a polymerized product of a polymerizable composition comprising
- (1) 8 to 65 weight percent maleic anhydride based on the total weight of monomers in the polymerizable composition;
- (2) 30 to 85 weight percent divinylbenzene based on the total weight of monomers in the polymerizable composition;
- and
- (3) 0 to 40 weight percent of a styrene-type monomer based on the total weight of monomers in the polymerizable composition, wherein the styrene-type monomer is styrene, an alkyl-substituted styrene, or a combination thereof;
- and
- (b) a nitrogen-containing compound that is selected from ammonia or a compound having at least one primary amino group or at least one secondary amino group,
- and wherein the polymeric sorbent is present in the form of porous particles.
Dependencies are inferred from the claim text.