公开(公告)号：US12286382B2

公开(公告)日：2025-04-29

申请号：US16620087

申请日：2018-06-13

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Robert P. Brown ,  Taisiya Skorina ,  Rebecca L. A. Everman ,  Jean A Tangeman ,  Kenton D. Budd

IPC: C04B41/87 ,  C04B35/10 ,  C04B35/46 ,  C04B40/02 ,  C04B111/00 ,  C04B111/80 ,  E04D7/00

Abstract: 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.