Graphene-containing roofing materials and related methods

Patent metadata

Field	Value
Publication number	US-11565970-B1
Application number	US-202217856386-A
Country	US
Kind code	B1
Filing date	Jul 1, 2022
Priority date	Jul 1, 2021
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

Some embodiments of the present disclosure relate to a roofing material, wherein the roofing material may comprise a plurality of coated roofing granules, wherein each of the plurality of the coated roofing granules may comprise a roofing granule having an outer surface; and a granule coating, wherein the granule coating is disposed on at least a portion of the outer surface of the roofing granule, and wherein the granule coating comprises graphene. Some embodiments of the present disclosure relate to a roofing material, wherein the roofing material may further comprise a reflective base coating, wherein the reflective base coating is positioned between the outer surface of the roofing granule and the granule coating.

First claim

What is claimed is:

1. A roofing material, comprising:
a plurality of coated roofing granules, wherein each of the plurality of coated roofing granules comprises:
a roofing granule,
wherein the roofing granule having an outer surface;

a coating,
wherein the coating disposed on at least a portion of the outer surface of the roofing granule;
wherein the coating having an outer surface; and

a graphene particle layer,
wherein the graphene particle layer is composed of a plurality of graphene particles;
wherein the graphene particle layer is disposed on at least a portion of the outer surface of the coating.

2. The roofing material of claim 1 , wherein the graphene particle layer covers 25% to 95% of the outer surface of the coating.

3. The roofing material of claim 1 , wherein the graphene particle layer is directly exposed to an environment.

4. The roofing material of claim 1 , wherein the coating comprises at least one of a metal silicate binder, a phosphate binder, a fluoropolymer coating, an acrylic coating, a polyurethane coating, a sol-gel coating, a silica coating, or any combination thereof.

5. The roofing material of claim 1 , wherein the coating comprises at least one of a latent heat reactant, a dispersing agent, a curing agent, an accelerator, a viscosity modifier, a color pigment, or any combination thereof.

6. The roofing material of claim 1 , wherein the coating comprises a polymer.

7. The roofing material of claim 1 , wherein the coating covers 25% to 100% of the outer surface of the roofing granule.

8. The roofing material of claim 1 , wherein the roofing material has a CIELAB color value comprising an L* value of 50 or less.

9. The roofing material of claim 1 , wherein the roofing material has a CIELAB color value comprising an L* value range of 0<L*<40.

10. The roofing material of claim 1 , wherein a total solar reflectance of the plurality of coated roofing granules is at least 10% greater than a roofing granule control, wherein the roofing granule control does not comprise a graphene particle layer, wherein the total solar reflectance is measured via a spectrophotometer according to ASTM E903.

11. The roofing material of claim 1 , wherein each of the plurality of coated roofing granules further comprises:
a reflective base coating,
wherein the reflective base coating is positioned between the roofing granule and the coating.

12. The roofing material of claim 11 , wherein the reflective base coating comprises at least one of a reflective pigment, a transitional metal oxide, a cool pigment, a metallic pigment, a metallic particle, a mirrored pigment, a light scattering additive, an opacifier, a thin-film coated particle, or any combination thereof.

13. A roofing shingle comprising:
a substrate;
an asphalt filled coating on the substrate; and
a plurality of coated roofing granules disposed on the asphalt filled coating, wherein each of the plurality of coated roofing granules comprises:
a roofing granule,
wherein the roofing granule having an outer surface;

a coating,
wherein the coating disposed on at least a portion of the outer surface of the roofing granule;
wherein the coating having an outer surface; and

a graphene particle layer,
wherein the graphene particle layer is composed of a plurality of graphene particles;
wherein the graphene particle layer is disposed on at least a portion of the outer surface of the coating.

14. The roofing shingle of claim 13 , wherein the graphene particle layer covers 25% to 95% of the outer surface of the coating.

15. The roofing shingle of claim 13 , wherein the graphene particle layer is directly exposed to an environment.

16. The roofing shingle of claim 13 , wherein the coating comprises at least one of a metal silicate binder, a phosphate binder, a fluoropolymer coating, an acrylic coating, a polyurethane coating, a sol-gel coating, a silica coating, or any combination thereof.

17. The roofing shingle of claim 13 , wherein the roofing shingle having a CIELAB color value comprising an L* value range of 0<L*<40.

18. The roofing shingle of claim 13 , wherein a total solar reflectance of the roofing shingle is at least 10% greater than a roofing shingle control, wherein the roofing shingle control does not comprise a graphene particle layer, wherein the total solar reflectance is measured via a spectrophotometer according to ASTM E903.

19. The roofing shingle of claim 13 , wherein each of the plurality of coated roofing granules further comprises:
a reflective base coating,
wherein the reflective base coating is positioned between the outer surface of the roofing granule and the coating.

20. A method comprising:
obtaining a plurality of roofing granules;
obtaining a coating material;
obtaining a graphene composition,
wherein the graphene composition comprises a plurality of graphene particles;

applying the coating material to the plurality of roofing granules so as to form a plurality of coated roofing granules,
wherein the coating disposed on at least a portion of an outer surface of each of the plurality of roofing granules;

applying the graphene composition to the plurality of coated roofing granules such that a graphene particle layer covers at least a portion of an outer surface of the coating disposed on each the plurality of coated roofing granules,
wherein the graphene particle layer is composed of a plurality of graphene particles; and

heating the plurality of coated roofing granules to a first temperature.

Assignees

• Bmic Llc

Inventors

• Shiao Ming-Liang

Classifications

• C04B2111/00586

  Roofing materials · CPC title

• C04B26/26

  Bituminous materials, e.g. tar, pitch {(C08L95/00 takes precedence)} · CPC title

• C04B20/1059

  Pigments or precursors thereof · CPC title

• C04B2103/54

  Pigments; Dyes · CPC title

• E04D1/20 Primary

  of plastics; {of asphalt;} of fibrous materials · CPC title