Flame retardant vapor retarding membranes
AssigneeCertainTeed Corporation
InventorsTimothy Jerome Coogan, Jeffrey H. Peet, Nicholas David Orf
Life of this patent
Estimating the term…
Abstract
The present disclosure relates generally to flame retarding building materials and methods for making them. More particularly, the present disclosure relates to flame retarding building materials that have both flame retardant character and desirable water vapor permeability values. In one embodiment, the disclosure provides a flame retardant vapor retarding membranes comprising: a building material substrate sheet having a melt viscosity of about 1 Pa·s to about 100,000 Pa·s at about 300° C. at 1 rad/s; and a polymeric coating layer disposed on the building material substrate layer, wherein the coating layer has a melt viscosity of about 1 Pa·s to about 100,000 Pa·s at about 300° C. at 1 rad/s.
Claims22
A flame retardant vapor retarding membrane, comprising
- a building material substrate sheet having a melt viscosity of about 1 Pa·s to about 1000 Pa·s at measured at 300° C. and 1 rad/s, the building material substrate sheet being a non-woven fabric or a perforated sheet;
- and
- a polymeric coating layer coated on the substrate sheet, the polymeric coating layer having a melt viscosity of about 1 Pa·s to about 1000 Pa·s measured at 300° C. and 1 rad/s, wherein the polymeric coating layer includes a continuous organic phase, with a particulate hydrophilic inorganic filler dispersed therein in an amount of about 10 wt % to about 70 wt %, the particulate hydrophilic inorganic filler being aluminum trihydrate, kaolin, expandable graphite or a combination thereof, the continuous organic phase comprising a hydrophobic polymer in an amount of at least about 70 wt %, based on the total weight of the continuous organic phase of the polymeric coating layer.
Dependencies are inferred from the claim text.