Patent ID: 9408383
Filing Date: 2016-08-09
CPC Classification: A01N

Claim Text:
1. A coating for use with a roofing granule, the coating comprising sodium silicate, a clay, or a sol gel with a biocidal glass composition, the biocidal glass composition comprising glass doped with at least one biocidal agent, the biocidal agent at least partially solubilized within a glass composition matrix wherein the glass comprises at least one of soda-lime silicate glass, float glass, borate glass, or combinations thereof, the at least one biocidal agent comprising about 0.01 wt. % to about 50 wt. % of a total weight % of the biocidal glass composition, wherein the at least one biocidal agent comprises copper oxide present at about 20 wt. % to about 50 wt. % of the total weight of the biocidal glass composition, the biocidal glass composition having a solubility when exposed to an aqueous environment and the at least one biocidal agent has a first steady normalized flux from the biocidal glass composition after about 2 to about 4 years under normal outdoor weather conditions, wherein the roofing granule has an L* value of at least 40 as measured by a CIE LAB color scale.