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US 11,987,524 B2Granted
Building materials comprising agglomerated particles
AssigneeSpecialty Granules Investments LLC
InventorsJustin P. Dunlap, John Allen Horton, Olan Leitch, Daniel E. Rardon
Life of this patent
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Abstract
Roofing granules comprising agglomerated inorganic material, and building materials, such as shingles, that include such roofing granules. By fabricating roofing granules from agglomerating inorganic material it is possible to tailor the particle size distribution so as to provide optimal shingle surface coverage, thus reducing shingle weight and usage of raw materials. Additionally, the use of agglomeration permits the utilization of by-products from conventional granule production processes.
Claims15
A method comprising:
- obtaining an agglomerated particle, the agglomerated particle comprising (a) a plurality of fragments of at least one of a rock, a mineral, or a combination thereof and (b) a binder, agglomerated together to form the agglomerated particle, wherein the plurality of fragments of the at least one of a rock, a mineral, or a combination thereof comprises fragments having a particle size passing US Mesh 100 but retained by US Mesh 270, wherein the agglomerated particle is an unsintered agglomerated particle, wherein the at least one of a rock, a mineral, or a combination thereof comprises at least one of basalt, metabasalt, andesite, rhyolite, or a combination thereof, and wherein the binder is present in the agglomerated particle in an amount of not more than 8 wt %;
- and
- applying the agglomerated particle to a sheet to form a roofing product.
Dependencies are inferred from the claim text.