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US 12,753,607 B2Granted
Algaecidal roofing granules, roofing products including them, and methods for making them
AssigneeCertainTeed Corporation
InventorsXiaofeng Tang, Valerio Massara, Shuang Liu, Mark Simon
Life of this patent
Estimating the term…
Abstract
Provided are roofing granules, such as algaecidal roofing granules, methods for making them and their use in roofing products. In one aspect, the disclosure provides an algaecidal roofing granule that comprises an ion-exchanged zeolite disposed within the binder, wherein the ion-exchanged zeolite comprises algaecidal ions.
Claims21
A roofing product comprising a base sheet and a mix of a first plurality of algaecidal roofing granules and a second plurality of roofing granules wherein each of the algaecidal roofing granules comprises:
- an algaecidal composition, the algaecidal composition comprising an ion-exchanged zeolite, wherein the ion-exchanged zeolite comprises algaecidal ions, wherein the algaecidal composition makes up the body of the algaecidal roofing granule,
- the base sheet having an upper surface, wherein the algaecidal roofing granules are disposed on at least a portion of the upper surface of the base sheet,
- wherein the algaecidal roofing granules makes up 3 wt. % to 30 wt. % of the mix of the first plurality of algaecidal roofing granules and the second plurality of roofing granules.
Dependencies are inferred from the claim text.