Photocatalytic composition and method for preventing algae growth on building materials
Assignee3M Innovative Properties Company
InventorJeffrey L. Jacobs
Life of this patent
Estimating the term…
Abstract
The present invention provides a coating composition for substrates. The coating composition of the present invention generally includes a silicate binder and a plurality of photocatalytic particles. The silicate binder functions as a bonding agent to establish the coating on the substrate. A plurality of photocatalyst particles are dispersed throughout the silicate binder. The particles are included in an amount that provides sufficient distribution of the particles in the resulting coating. The incorporation of the present invention onto substrates prevents algal growth on building materials utilizing the coated substrates.
Claims12
Roofing granules comprising:
- a plurality of coated roofing granules, each of said coated roofing granules including an inorganic granule and a coating applied onto an outer surface of said inorganic granule, said coating including an amount of a silicate binder sufficient to bind said coating to said inorganic granule, and said coating including a plurality of photocatalytic particles;
- wherein said silicate binder is an alkali metal silicate binder.
A coated substrate, comprising:
- a substrate having an outer surface suitable for receiving a coating;
- a coating applied onto the outer surface of said substrate, said coating including an amount of an alkali metal silicate binder sufficient to bind said coating to said substrate, and said coating including a plurality of photocatalytic particles.
Dependencies are inferred from the claim text.