Algae-resistant roofing granules

Details Algae-resistant roofing granules Algae-resistant roofing granules

A - Human Necessities

01

N

A01N 59/02 (2006.01) A01N 59/20 (2006.01) B05D 7/00 (2006.01) B32B 5/16 (2006.01) E04D 7/00 (2006.01) E04D 13/00 (2006.01)

Patent

CA 2375459

Algae-resistant roofing granules coated with: a first coat consisting of a fired silicate-clay matrix containing cuprous oxide and zinc sulfide to provide a slow, long-term bimetallic copper and zinc ions release; and a second coat consisting of a fired silicate-clay matrix containing a pigment.

La présente invention concerne des granules pour toiture résistantes aux algues revêtues des composants suivants: un premier revêtement composé d'une matrice d'argile cuite silicatée contenant de l'oxyde cuivreux et du sulfure de zinc afin d'obtenir une libération lente et dans le long terme d'ions bimétalliques de zinc et de cuivre, et un second revêtement composé d'une matrice d'argile cuite silicatée contenant un pigment.

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