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US 10,011,092 B2Granted
Asphaltic sheet materials including expandable graphite
AssigneeFirestone Building Products Company, LLC
InventorsWensheng Zhou, Donald R. Kirk, James Young, Robert Anderson, Joseph Standeford, Lance Black
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Abstract
An asphaltic sheet comprising an asphaltic component including an asphalt binder and expandable graphite.
Claims16
An asphaltic sheet comprising:
- (i) an asphaltic component including an asphalt binder and a flame retardant, other than expandable graphite, dispersed within the asphalt binder, said asphaltic component including first and second planar surfaces;
- (ii) a release film removably secured to said first planar surface;
- (iii) a polymeric sheet adhesively secured to said second planar surface;
- and
- (iv) a concentrated region of expandable graphite at or near at least one of said first and second planar surfaces, where said concentrated region is in the form of a concentration gradient, where the concentration of expandable graphite within the gradient changes from a plane of maximum concentration to a plane of minimum concentration.
2 more elements
A method forming an asphaltic composite, the method comprising:
- (i) providing an asphaltic sheet, where the asphaltic sheet includes an asphaltic binder and a flame retardant dispersed within said asphaltic binder, and where said asphaltic sheet includes first and second planar surfaces;
- (ii) dropping expandable graphite on to the first planar surface of the asphaltic sheet to form a concentration gradient of the expandable graphite, wherein the concentration of the expandable graphite decreases from said first planar surface to said second planar surface of said asphaltic sheet;
- (iii) laminating a polymeric sheet to the first planar surface of the asphaltic sheet;
- and
- (iv) removably securing a release film to the second planar surface of the asphaltic sheet.
2 more elements
Dependencies are inferred from the claim text.