Polymeric sorbents for aldehydes and methods of making
Assignee3M Innovative Properties Company
InventorsMichael S. Wendland, Himanshu Jasuja, Michael W. Kobe
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Abstract
Polymeric sorbents for aldehydes including formaldehyde and acetaldehyde are provided. More particularly, the polymeric sorbents are sulfonic acid-containing polymeric materials with impregnated urea-based compounds. Additionally, methods of making the polymeric sorbent, methods of sorbing aldehydes (i.e., aldehydes that are volatile under use conditions) on the polymeric sorbents, compositions resulting from the sorption of aldehydes on the polymeric sorbents, and filters containing the polymeric sorbents are provided.
Claims15
A polymeric sorbent comprising:
- a) a sulfonic acid-containing polymeric material having covalently attached sulfonic acid groups, the sulfonic acid-containing polymeric material comprising a reaction product of a mixture comprising
- 1) A precursor polymeric material comprising a polymerized product of a polymerizable composition comprising aromatic monomers;
- and
- 2) A sulfonic acid agent;
- and
- b) urea-based compounds impregnated into the sulfonic acid-containing polymeric material.
A method of making a polymeric sorbent, the method comprising:
- a) obtaining a sulfonic acid-containing polymeric material having covalently attached sulfonic acid groups, the sulfonic acid-containing polymeric material comprising a reaction product of a mixture comprising
- 1) A precursor polymeric material comprising a polymerized product of a polymerizable composition comprising aromatic monomers;
- and
- 2) A sulfonic acid agent;
- and
- b) impregnating the sulfonic acid-containing polymeric material with a urea-based compound to form the polymeric sorbent.
Dependencies are inferred from the claim text.