N-alkylchitosan films and laminates made therefrom
AssigneeE.I. du Pont de Nemours and Company
InventorEdward George Howard, JR.
Life of this patent
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Abstract
N-alkylchitosan films, composite films, and, laminates, made from the films are provided. The films and laminates can be used to make a variety of finished articles that can be used to provide protection from hazardous chemical and biological agents.
Claims21
A method of inhibiting the permeation of a chemically or biologically harmful agent through a laminate or a structure or item of apparel fabricated therefrom, by including within the laminate a continuous N-alkylchitosan film.
A selectively permeable protective structure comprising a continuous N-alkylchitosan film and at least one layer of fabric.
A finished article incorporating a laminate comprising a continuous N-alkylchitosan film and at least one layer of fabric.
20 The method of claim 1 wherein said method provides protection of military personnel against dermal exposure to chemical and biological agents potentially encountered in a warfighter environment;
- protection of first responder personnel from chemical or biological agents in an emergency response situation;
- or protection of cleanup personnel from chemical or biological agents during a hazmat response situation.
A composite film comprising chitosan and N-methylchitosan.
Dependencies are inferred from the claim text.