Gas resistant foam materials
AssigneeHer Majesty the Queen in right of Canada
InventorJohn A. H. Hart
Life of this patent
Estimating the term…
Abstract
Laminated fabric materials which are resistant to the passage of noxious chemicals in the form of liquids and condensible vapors and gases, but which are relatively permeable to air and water vapor, are described. Said laminated materials comprise (a) an air and water vaporpermeable open cell solid resin foam resistant to passage therethrough of noxious chemicals in liquid or vapor form, said foam having dispersed therein a particulate adsorbent material for said noxious chemicals, said particulate adsorbent material being bonded in said foam by an organic binder which is substantially free from substances which substantially deactivate the adsorbent; and (b) an air and water vapor-permeable fabric backing to which the aforesaid foam is bonded.
Claims11
A laminated fabric material comprising an air and water permeable open cell solid flexible polyurethane foam resistant to passage therethrough of noxious chemicals in liquid or vapor form, said foam having dispersed therein particulate activated carbon of average particle size in the range of 7 to 10 microns and in an amount of at least 10% by weight of said foam but not in excess of 12 milligrams per sq. cm. of foam, said particulate activated carbon being bonded in said foam by an acrylic elastomeric binder which is substantially free from substances which substantially deactivate the carbon, said binder being present in an amount of from 15 to 100 parts by weight per 100 parts by weight of said activated carbon, and an air and water vapor permeable fabric backing to which said foam is bonded.
Dependencies are inferred from the claim text.