3m Innovative Properties Company

Robert P Brown

Kenton D Budd

Jean A Tangeman

Craig W Lindsay

Taisiya Skorina

Rachael A T Gould

Rebecca L A Everman

Rebecca L Everman

Zachary M Schaeffer

Plurality of granules comprising a ceramic core having an outer surface and a shell on and surrounding the core, wherein the shell comprises ceramic particles bound together with an inorganic binder, the inorganic binder comprising reaction product of at least alkali silicate and hardener, wherein the ceramic particles are present as greater than 50 percent by weight of the shell of the respective granule, based on the total weight of the shell of the respective granule, wherein the shell of each granule has a total porosity in a range from greater than 0 to 60 percent by volume, based on the total volume of the shell of the respective granule, wherein the shell of each granule has a volume of at least 40 volume percent, based on the total volume of the respective granule, and wherein the granules have a minimum Total Solar Reflectance of at least 0.7. The granules are useful, for example, as roofing granules.

Granules

A granule and building material including a granule having an inner zone and an outer zone that at least partially surrounds the inner zone and that comprises greater than 10% of the total volume of the granule is provided.

Glass granule having a zoned structure

Growing community of inventors

Hudson, WI, United States of America

Robert P Brown