Zwitterionic-doped hydrogels and anti-fogging coatings comprising the same
Assigneeactnano, Inc.
InventorsPeter Kim-Santos, Sruti Balasubramanian, Justin A Kleingartner
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Abstract
An anti-fog material comprising a zwitterionic-doped hydrogel made up of charged monomers, at least a portion of which comprise zwitterionic monomers, uncharged hydrophilic monomers, and at least one crosslinking agent is disclosed. A composition for forming the hydrogel and a transparent, removable article comprising the anti-fog material are also disclosed. The article, which may be in the form of a film or decal, may comprise an active layer attached to a backing layer, the active layer comprising an anti-fog material described herein. A method of making a surface of a substrate resistant to fogging by applying the transparent and removable article thereto is also disclosed.
Claims28
A composition for forming a hydrogel that imparts anti-fog properties to the hydrogel, the composition comprising:
- charged monomers, at least a portion of which comprise zwitterionic monomers, and uncharged hydrophilic monomers,
- wherein the charged monomers and the uncharged hydrophilic monomers contain reactive groups, which react to form said hydrogel having anti-fog properties,
- wherein the hydrogel exhibits Δ Haze values of less than 5% when exposed to fog conditions.
An anti-fog material comprising a zwitterionic-doped hydrogel, said zwitterionic-doped hydrogel comprising:
- charged monomeric residues, at least a portion of which comprise zwitterionic monomeric residues;
- uncharged hydrophilic monomeric residues;
- and
- at least one crosslinking agent residue,
- wherein the anti-fog material exhibits Δ Haze values less than 5% when exposed to fog conditions.
A coated article comprising:
- a substrate and an anti-fog coating, said anti-fog coating comprising:
- a zwitterionic-doped hydrogel, said zwitterionic-doped hydrogel comprising:
- charged monomeric residues, at least a portion of which comprise zwitterionic monomeric residues;
- uncharged hydrophilic monomeric residues;
- and
- at least one crosslinking agent residue, wherein the anti-fog coating exhibits Δ Haze values of less than 5% when exposed to fog conditions.
A method of making a surface of a substrate resistant to fogging, said method comprising:
- applying to the surface of the substrate a zwitterionic-doped hydrogel comprising:
- charged monomeric residues, at least a portion of which comprise zwitterionic monomeric residues;
- uncharged hydrophilic monomeric residues;
- and
- at least one crosslinking agent residue, wherein the zwitterionic-doped hydrogel exhibits Δ Haze values of less than 5% when exposed to fog conditions.
Dependencies are inferred from the claim text.