Non-white construction surface

E - Fixed Constructions – 04 – D

Patent

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Details

E04D 7/00 (2006.01) C04B 41/52 (2006.01)

Patent

CA 2541884

A non-white construction surface comprising a substrate, a first reflective coating on at least a portion of an outer surface of the substrate, the coated substrate exhibiting a minimum direct solar reflectance value of at least about 25 %, and a second reflective coating on at least a portion of the first reflective coating, wherein the combination of the first reflective coating and the second reflective coating provide the substrate with at least one of (i) a reflectivity of at least about 20 % at substantially all points in the wavelength range between 770 and 2500 nm, and (ii) a summed reflectance value of at least 7000 as measured in the range between 770 and 2500 nm inclusive. Also provided are various substrates having the coatings described as well as methods of providing the described construction surfaces.

La présente invention concerne une surface de construction non blanche comprenant un substrat, un premier revêtement réfléchissant appliqué sur au moins une partie d'une surface extérieure du substrat, le substrat revêtu ayant une valeur de réflectance solaire directe minimale d'au moins environ 25 %, et un second revêtement réfléchissant appliqué sur au moins une partie du premier revêtement réfléchissant, la combinaison du premier revêtement réfléchissant et du second revêtement réfléchissant permettant d'obtenir un substrat ayant au moins : (i) une réflectivité d'au moins environ 20 % sensiblement en tous points de la plage de longueurs d'onde de 770 à 2500 nm ; et (ii) une valeur de réflectance totale d'au moins 7000 telle que mesurée sur la plage de longueurs d'onde de 770 à 2500 nm. L'invention a également pour objet différents substrats présentant lesdits revêtements, et des procédés pour produire les surfaces de construction de l'invention.

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