Asphalt nanocomposite-based roofing products
AssigneeBuilding Materials Investment Corporation
InventorsVinay Mehta, Brian Kanze, Krishna Srinivasan, Awdhoot Vasant Kerkar
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Abstract
An asphalt-based nanocomposite useful as a coating for various applications including building materials products, such as shingles, is provided. The asphalt-based nanocomposites are particle-filled matrices that include an asphalt flux or derivate thereof and a layered clay mineral in an amount ranging from about 1 to about 15 weight %. Coated articles such as shingles including the asphalt-based nanocomposite are also disclosed as well as various methods of preparing the asphalt-based nanocomposite.
Claims8
A method of preparing a shingle, the method comprising
- mixing from about 1 to about 15 weight % of a layered clay mineral into an asphalt flux of partially or fully oxidized asphalt to form a nanocomposite;
- wherein the mixing is performed in a blender than can operate at low shear conditions at 500-1200 rpm mixing speed;
- applying a coating comprising the nanocomposite to at least one surface of a substrate wherein said substrate is a base layer or a material layer of a building materials product;
- and wherein said building materials product is a shingle.
A method of preparing a nanocomposite comprising
- fractionating an asphalt flux or partially or fully oxidized asphalt into an asphaltene fraction, a polar aromatic fraction, a naphthene fraction and a saturate fraction;
- mixing from about 1 to about 15 weight % of a layered clay mineral into one of said fractions;
- and recombining said fraction containing said layered clay mineral with said other fractions.
A method of preparing a nanocomposite comprising
- introducing from about 1 to about 15 weight % of a layered clay mineral into an asphalt flux or partially or fully oxidized asphalt to provide a premix;
- and
- oxidizing (blowing) the premix.
A coated article comprising
- a substrate having at least one surface that is coated with a nanocomposite, said nanocomposite comprising an asphalt flux or partially or fully oxidized asphalt;
- and
- a layered clay mineral in an amount from about 1 to about 15 weight %, based on the total weight of the nanocomposite;
- wherein said substrate is a base layer or a material layer of a building materials product, and wherein said building materials product is a shingle.
Dependencies are inferred from the claim text.