Energy efficient construction materials

摘要

A roofing shingle may include a substrate, granules and multilayer infrared light reflecting film particles. In some cases, a roofing shingle may include a substrate, granules and a multilayer infrared light reflecting film disposed either above or below the granules. Such roofing shingles may exhibit improved solar reflectivity. An infrared light reflecting mixture may include inorganic granules and polymeric multilayer infrared light reflecting film particles. An existing construction surface may be treated to improve its solar reflectivity.

主权项

1. An infrared light reflecting mixture, comprising:
inorganic granules having a mean size ranging from about 0.1 millimeters to about 5 millimeters; and polymeric multilayer infrared light reflecting film particles comprising a plurality of alternating polymeric layers, wherein the particles exhibit a mean size ranging from about 50 micrometers to about 5 millimeters, and further wherein the polymeric multilayer infrared light reflecting film particles are at least about 90 percent transparent to incident light within the visible spectrum of about 400 to about 700 nanometers, wherein the relative weight percent of inorganic granules to polymeric multilayer infrared light reflecting film particles is about 99.95 to about 70 weight percent inorganic granules and about 0.05 to about 30 weight percent polymeric multilayer infrared light reflecting film particles.