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US 5,516,573 AGranted
Roofing materials having a thermoplastic adhesive intergace between coating asphalt and roffing granules
AssigneeMinnesota Mining and Manufacturing Company
InventorsBilly L. George, Stefan A. Babirad, Vincent J. Laraia, Jr., Wilson S. Bigham
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Abstract
An asphalt-based roofing product includes an asphalt-based substrate such as asphalt-saturated fiberglass or cellulose felt, a non-asphalt, thermoplastic, water-resistant adhesive on the surface of the asphalt-based substrate, and a plurality of roofing granules embedded in the asphalt such that the adhesive provides an interface between the asphalt and roofing granules. The adhesive is present in an amount sufficient to improve the adhesion of the roofing granules to the asphalt.
Claims8
A roofing product comprising:
- (a) coating asphalt;
- (b) a plurality of roofing granules embedded in the coating asphalt;
- and
- (c) a non-asphalt, thermoplastic water-resistant adhesive applied onto a surface of the coating asphalt and covering at least a portion of said surface of the coating asphalt so as to provide an interface between the roofing granules and the coating asphalt.
1 more element
Dependencies are inferred from the claim text.