Colored roofing granules with increased solar heat reflectance, solar heat-reflective shingles, and process for producing same
First Claim
1. Colored infrared-reflective roofing granules comprising base particles comprising inert mineral particles coated with a cured first coating composition comprising including a base particle binder and at least one colorant selected from the group consisting of uv-stabilized dyes and granule coloring pigments, the base particles being coated with a cured second coating composition comprising a coating binder and at least one infrared-reflective functional pigment.
2 Assignments
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Accused Products
Abstract
Solar-reflective roofing granules having deep-tone colors are formed by coating base mineral particles with a coating composition including an infrared-reflective pigment. Color is provided by colored infrared pigment, light-interference platelet pigment, or a metal oxide.
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Citations
20 Claims
- 1. Colored infrared-reflective roofing granules comprising base particles comprising inert mineral particles coated with a cured first coating composition comprising including a base particle binder and at least one colorant selected from the group consisting of uv-stabilized dyes and granule coloring pigments, the base particles being coated with a cured second coating composition comprising a coating binder and at least one infrared-reflective functional pigment.
- 8. A bituminous roofing product comprising a substrate sheet of a fibrous material saturated with a bituminous coating material and colored infrared-reflective roofing granules comprising base particles comprising inert mineral particles coated with a cured first coating composition comprising including a base particle binder and at least one colorant selected from the group consisting of uv-stabilized dyes and granule coloring pigments, the base particles being coated with a cured second coating composition comprising a coating binder and at least one infrared-reflective functional pigment.
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15. A method for preparing colored infrared-reflective roofing granules, the method comprising:
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(a) providing inert mineral particles; (b) coating the inert mineral particles with first coating composition comprising including a base particle binder and at least one colorant selected from the group consisting of uv-stabilized dyes and granule coloring pigments, (c) curing the first coating composition to provide base particles; (d) coating the base particles with a second coating composition comprising a coating binder and at least one infrared-reflective functional pigment; and (e) curing the second coating composition. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification